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SERVICE MANUAL

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3. 2 6 Outline of operation control by microcomputer E How to read the model name Example SR F 50 Z IX S Series code Inverter type Product capacity L Floor standing type Split type room air conditioner iring 2 1 Electrical w 1 Indoor unit Models SRF25ZIX S 3521 5 50ZIX S 34IM TWNOIS NC S34IM YAMOd U89J2 M0 94 DA pey en g 18 yoe d 20 09 Ae 10109 10491 ICA BA yoo q euluJ8 1 asn4 15 apoiq Sq Josues Kiipiung eyl Josu s 9x ieoH 21441 Josu s duej uooy LI Wie Jedue Nd Joiou jedueq HQ J030U de 4 INS JO OW UP Nd 10 9 uu09 ZXN JN9 Uo13d 49seq LINN 5000110 OL YSSNVHOXA 1V3H ZHOS Orc Occ aseyd a04nos 1 MOd e as Lx T 18 Mine MJONVHOXA f 1V3H NS HM PA n 9 DAK 11 1 ere eg Es 1 eer t 3 NI8 0S LL SNO 75 11 JOVANI p cul 1
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5. If no data are recorded error code is normal the information display in the remote controller becomes as follows Remote controller setting Display when error code is normal in service mode Operation switching in service mode Switch nen 7 when there is an there is an RUN light abnormal stop TIMER light _ abnormal stop Operation switching Fan speed switching 0 AUTO 0 AUTO 1 DRY 2 HI 2 COOL 3 MED 3 FAN 4 LO 4 HEAT 6 HI POWER 7 ECONO Operation switching AUTO Fan speed switching AUTO Example Operation switching fan speed switching cooling HI 1 5 sec ON RUN light 10 s digit OFF ON TIMER light 1 s digit OFF a 11 second interval e Room temperature sensor indoor heat exchanger sensor outdoor air temperature sensor outdoor heat exchanger sensor table Units C TIMER light 1 s digit digit 1 2 3 4 5 6 7 8 8 9 Buzzer sound 6 60 61 62 63 64 5 50 51 52 53 54 55 56 57 58 59 4 40 41 42 43 44 45 46 47 48 49 n secondi 3 30 31 32 33 34 35 36 37 38 39 2 20 21 22 23 24 25 26 27 28 29 1 10 31x 12 13 14 15 16 17 18 19 0 Meade sear wee oe 0 1 22 3 4 5 6 7 8 9 1
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11. Note 1 Even in cases where only intermittent stop data are generated the air conditioning system is normal However if the same protective operation recurs re peatedly 3 or more times it will lead to customer complaints Judge the conditions in comparison with the contents of the complaints 5 Self diagnosis table When this air conditioner performs an emergency stop the reason why the emergency stop occurred is displayed by the flashing of display lights If the air conditioner is operated using the remote controller 3 minutes or more after the emergency stop the trouble display stops and the air conditioner resumes operation m i e Indoor unit display panel Outdoor Wired AV 4 remote Description T RUN TIMER it controller of trouble Cause Display flashing condition light light LED display Broken heat exchanger sensor When a heat exchanger sensor 1 wire disconnection is detected while 1 time ON zz Heat exchanger 1 wire poor connector operation is stopped If a temperature of 28 or lower is detected for flash sensor error connection 15 seconds it is judged that the wire is disconnected Indoor PCB is faulty Not displayed during operation R Broken room temperature When a room temperature sensor wire disconnection is detected while 2 time ON t t sensor wire poor connector opera
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15. Red 5 SS Yellow DC308 336V GND 2 Fan motor resistance check Measuring point Resistance when normal Notes 1 Remove the fan motor and measure it without power connected to it 6 4 Red Black 20 MQ or higher 2 If the measured value is below the value when the motor is normal it means White Black 20 MQ or higher that the fan motor is faulty 3 2 Servicing 1 Evacuation 2 The evacuation is an procedure to purge impurities noncondensable gas air moisture from the refrigerant equipment by us ing a vacuum pump Since the refrigerant RA10A is very insoluble in water even a small amount of moisture left in the refriger ant equipment will freeze causing what is called water clogging Evacuation procedure a b c Notes Check to ensure that there is no internal pressure in the unit If there is an internal pressure it should be relieved through the check joint Connect the service hoses of the gauge manifold to the check joint of the gas amp liquid piping Connect a vacuum pump to the charge hose A Repeat evacuation in the following sequence Liquid side Vacuuming begins Run the vacuum pump for at least one hour after the vacuum gauge shows 101kPa or lower 755mmHg or lower Vacuuming completed Confirm that the vacuum gauge indicator does not rise even if the system is left for one hour or
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19. 1 Indoor heat exchanger temperature Th2 is lower than 5 C compressor 2 5 minutes after reaching the compressor command speed except 0 rps ded b Detail of anti frost operation Lower Indoor heat exchanger limit temperature 5 C or lower 2 5 C or lower Item p speed Lower limit of compressor command speed 22 rps model 50 60 25 rps 0 rps 0 rps Protects the fan tap just Indoor fan Depends on operation mode frost prevention control Outdoor fan Depends on command speed Depends on stop mode 4 way valve OFF Notes 1 When the indoor heat exchanger temperature is in the range of 2 5 S C the speed is reduced by 4 rps at each 20 seconds 2 When the temperature is lower than 2 5 C the compressor is stopped 3 When the indoor heat exchanger temperature is in the range of 5 8 C the compressor command speed is been maintained c Reset conditions When either of the following condition is satisfied 1 The indoor heat exchanger temperature Th2 is 8 C or higher 2 The compressor command speed is 0 rps 2 Cooling overload protective control Indoor heat exchanger temperature C a Operating conditions When the outdoor air temperature TH2 has become continuously for 30 seconds at 41 C or more or 47 C or more Models 50 60 41 C or more with the compressor running the lower limit speed of compressor is brought up Item SRK20 35ZIX S SRK50 60ZIX S
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23. 1 6 11 Outline of automatic operation 1 2 3 4 Determination of operation mode The unit checks the indoor temperature and the outdoor air temperature determines the operation mode and then begins in the automatic operation Cooling 27 5 Boo pie EE ES Indoor air temperature C Dehumidifying 19 5 eae Heating 1 1 18 30 Outdoor air temperature The unit checks the temperature every hour after the start of operation and if the result of check is not same as the previous operation mode changes the operation mode When the unit is started again within one hour after the stop of automatic operation or when the automatic operation is selected during heating cooling or dehumidifying operation the unit is operated in the previous operation mode Setting temperature can be adjusted within the following range There is the relationship as shown below between the signals of the wireless remote controller and the setting temperature Unit C Signals of wireless remote controller Display 6 5 4 3 2 1 0 1 2 3 4 5 6 Cooling 18 19 20 21 22 23 24 25 26 27 28 29 30 Setting ae Dehumidifying 19 20 21 22 23 24 25 26 27 28 29 30 31 temperature Heating 20 21 22 23 24 25 26 27 28 29 30 31 32 1 6 12 Protective control function 1 Frost prevention control During cooling or dehumidifying a Operating conditions
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38. 18 CDB 20 CDB 22 CDB TC SHC TC SHC TC SHC TC SHC TC SHC TC SHC 4 14 4 07 4 18 412 4 13 3 98 4 09 4 02 4 13 4 08 4 09 3 96 4 03 3 96 4 09 4 04 4 06 3 93 3 97 3 91 4 04 4 00 4 03 3 91 35 4 15 3 36 4 42 3 34 4 82 3 58 5 00 3 57 5 12 3 54 5 43 3 70 5 66 3 62 36 4 08 3 33 4 35 3 31 4 76 3 55 4 94 3 55 5 06 3 51 5 37 3 68 5 61 3 60 38 3 94 3 26 4 21 3 24 4 63 3 49 4 82 3 50 4 94 3 47 5 27 3 64 5 50 3 56 39 3 87 3 22 4 14 3 21 4 57 3 47 4 76 3 47 4 88 3 44 5 21 3 62 5 45 3 55 15 CWB 3 61 3 58 3 45 10 CWB 4 10 4 05 3 95 5 cWB 4 46 4 37 4 32 Hi O0CWB 4 67 4 59 4 54 10 7 m min 5 CWB 6CWB 5 97 5 94 5 82 10 CWB 15 CWB 20 CWB 7 63 JO asn Aq s ui pexi eq Pinoys yun 400pino y uonisod jie pue peoejdsip Buraq 10 Bulag Jo e seu 1 ay ueuM o ejod uoee sea Jo 12e3u02 yams ejqnop e el eq 1 Ajddns surew y jo OY o1 uoroeuuoo eu
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45. 60 E 60 5 1 2350 byes to 50 5 a Se ey oe 4 B 40 en e Ime 40 9 EMEN M EMO J amp E 25 5 2 30 30 2 20 20 LIA 1141 11411 10 10 63 125 250 500 1000 2000 4000 8000 Mid Octave Band frequency Hz Model SRK60ZIX S Condition ISO T1 JIS C9612 Indoor Unit SRK60ZIX S Noise 47 dB A Level 45 dB A X Cooling O Heating Sound Pressure Level dB standard 2x10 Pa 63 125 250 500 1000 2000 4000 8000 Mid Octave Band frequency Hz Outdoor Unit SRC60ZIX S Noise 51 dB A Level 51 dB A 40 standard 2x10 30 Sound Pressure Level dB 20 20 TTTTTTTTTTTTTTTTTTTTTTTTTTTTT TTTTTT L ae Pu s 4 7 ra f B n 5 2 7 1111 111 10 10 125 250 500 1000 2000 4000 8000 Mid Octave Band frequency Hz nN 1 4 Sensible heat capacity Model SRK20ZIX S Outdoor air temp 21 CDB 14 CWB Cool Mode 23 CDB 16 CWB Indoor air temp 28 CDB 20 CWB 31 CDB 22 CWB 33 CDB 24 CWB TC SHC TC SHC TC SHC TC SHC Heat Mode outdoor air temp indoor air temp 16 CDB 18 CDB 20 CDB 24 CDB 215 211
46. Outdoor air temperature 41 C or more 47 C or more 41 C or more Lower limit speed 30 rps b Detail of operation 40 rps 1 The outdoor fan is stepped up by 3 speed step Upper limit 7th model 50 60 8th speed 30 rps 2 The lower limit of compressor command speed is set to 30 or 40 SRK50 60 30 rps and even if the calculated result becomes lower than that after fuzzy calculation the speed is kept to 30 or 40 SRK50 60 30 rps However when the thermo becomes OFF the speed is reduced to 0 rps c Reset conditions When either of the following condition is satisfied 1 The outdoor air temperature is lower than 40 C or 46 C 2 The compressor command speed is 0 rps 3 Cooling high pressure control a Purpose Prevents anomalous high pressure operation during cooling b Detector Outdoor heat exchanger sensor TH1 c Detail of operation Example Fuzzy After lapse of 30 sec or over After lapse of 30 sec or over lower limit speed 30 rps After lapse of 30 sec or over 53 58 63 Outdoor heat exchanger temperature C Notes 1 When the outdoor heat exchanger temperature is in the range of 58 63 C the speed is reduced by 6 rps at each 30 seconds 2 When the temperature is 63 C or higher the compressor is stopped 3 When the outdoor heat exchanger temperature is in the range of 53 58 C if the compresso
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55. Remote controller settings Display results Temperature setting Operation switching Fan speed switching lay data Buzzer Yes No RUN light Times TIMER light Times Display content MED Error code on previous occasion Cooling HI Room temperature sensor on previous occasion AUTO Indoor heat exchanger sensor 1 on previous occasion 21 LO Remote controller information on previous occasion MED Outdoor air temperature sensor on previous occasion Heating 7 HI Outdoor heat exchanger sensor on previous occasion AUTO Discharge pipe sensor on previous occasion 26 Cooling AUTO Indoor heat exchanger sensor 2 on previous occasion MED Error code on second previous occasion Cooling HI Room temperature sensor on second previous occasion AUTO Indoor heat exchanger sensor on second previous occasion 22 LO Remote controller information on second previous occasion MED Outdoor air temperature sensor on second previous occasion Outdoor heat exchanger sensor on second previous occasion AUTO Discharge pipe sensor on second previous occasion 27 Cooling AUTO Indoor heat exchanger sensor 2 on second occasion MED Error code on third previous occasion Cooling HI Room temperature sensor on third previous occasion AUTO Indoor heat exchanger sensor 1 on third previous occasion 23 LO Remote controller information on third previous occasion MED Outdoor air temperature sensor on third previous occasion Heating
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70. 26 28 30 32 34 36 38 0 2 4 6 8 10 12 14 16 18 0 eee 1 20 22 24 26 28 30 32 34 36 38 2 40 42 44 46 48 50 52 54 56 58 3 60 62 64 66 68 70 72 74 76 78 does not sound 4 s0 82 84 86 88 90 92 94 96 og 5 100 102 104 106 108 110 112 114 116 118 6 120 122 124 126 128 130 132 134 136 138 7 140 142 144 146 148 150 If no data are recorded error code is normal the display for each sensor becomes as shown below Sensor name Sensor value displayed when the error code is normal Discharge pipe sensor 64 C Example Discharge pipe temperature 122 C n the case of discharge pipe data multiply the reading value by 2 Below 61 x 2 122 0 1 sec ON If the temperature is lt 0 the buzzer sounds If the temperature 1520 the buzzer does not sound OFF 1 5 sec RUN light 10 s digit OFF ON Buzzer sound TIMER light 178 digit OFF 11 second interval Service data record form Customer Model Machine name Date of investigation Content of complaint
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72. Reset conditions When either of the following conditions is satisfied 1 The outdoor air temperature TH2 is 25 C or higher 2 compressor command speed is 0 rps Heating Operating conditions When the outdoor air temperature TH2 is 4 C or lower continues for 30 seconds while the compressor command speed is other than 0 rps Detail of operation The outdoor fan is stepped up by 2 speed step at each 20 seconds Upper limit 8th speed Reset conditions When either of the following conditions is satisfied 1 The outdoor air temperature TH2 is 6 C or higher 2 The compressor command speed is 0 rps 3 MAINTENANCE DATA 3 1 Troubleshooting procedures for electrical equipment 1 2 3 Cautions a If you are disassembling and checking an air conditioner be sure to turn off the power before beginning When working on indoor units let the unit sit for about 1 minute after turning off the power before you begin work When working on outdoor unit there may be an electrical charge applied to the main circuit electrolytic condenser so begin work only after discharging this electrical charge to DC 10 V or lower b When taking out printed circuit boards be sure to do so without exerting force on the circuit boards or package components c When disconnecting and connecting connectors take hold of the connector housing and do not pull on the lead wires Items to check before troubleshooting a Have yo
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78. ISO T1 JIS C9612 Level 50 dB A 70 N70 60 3 ET 50 5 ia B 40 2 oU a S 5 30 un 20 10 63 125 250 500 1000 2000 4000 8000 Mid Octave Band frequency Hz Outdoor Unit SRC50ZIX S Noise 48 dB A Level 48 dB A Xe Cooling O Heating 70 60 amp S e 50 DA 7 az B 40 S 5 5 30 o un 20 10 63 125 250 500 1000 2000 4000 8000 Mid Octave Band fequency Hz 2 4 Sensible heat capacity Model SRF25ZIX S Air flow Hi 9 0 m min Outdoor air temp 21 CDB Cool Mode Indoor air temp 26 CDB 31 CDB 14 CWB 23 CDB 16 CWB TC 18 CWB 27CDB 28 CDB 19 CWB 20 CWB TC 22 CWB 33 CDB 24 CWB TC SHC 2 95 3 11 2 90 2 85 2 30 3 07 2 80 2 28 2 74 2 26 2 68 2 23 2 63 2 21 2 57 2 18 2 51 2 16 2 44 2 13 2 38 2 11 2 31 2 08 2 25 2 05 2 21 2 03 2 18 2 02 2 11 1 99 2 07 1 98 Cool Mode Heat Mode outdoor Air flow 3 air temp 15 CWB indoor air temp 18 CDB 20 CDB 22 CDB 10 CWB 5 cWB O0CWB 5 CWB 6CWB 10 CWB 15 CWB 20 CWB Heat Mode Model SRF35ZIX S Indoor air temp Outdoor air tem
79. Indoor air temp Outdoor Air flow outdoor indoor air temp Air flow air temp air temp 16 CDB 18 CDB 20 CDB 22 CDB O0CWB 5 CWB 6CWB 10 CWB 15 CWB Hi 20 CWB 13 5 m min Model SRK60ZIX S Cool Mode Heat Mode outdoor indoor air temp Outdoor Air flow air temp air temp 16 CDB 18 CDB 20 CDB 22 CDB 15 CWB 4 18 4 09 4 00 3 92 10 CWB 4 73 4 65 4 59 4 47 5 cWB 5 13 5 05 4 95 4 90 O0CWB 5 88 5 30 5 20 5 14 5 CWB 6 85 6 77 6 73 6 60 6CWB 6 96 6 88 6 80 6 71 10 CWB 7 39 7 32 7 28 7 18 15 CWB 8 05 7 98 7 92 7 83 Hi 20 CWB 8 65 8 58 8 54 8 44 14 5 m min yooys ULI Jo 1ueureoejd ew e 10 pos Burujufi edid se e m y joeuuoo you oq SL6L 10 jo Aq uonisod 5 renueyog uim o9010Jd OJOAY eui Aq seb e si YOLPH aeydsowoye ay YOLPH 100 e pinoys yun JoOpyno ay uonisod sy pue peoe dsip Buraq 1
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82. s Power When the power transistor is judged breakdown while compressor ON 51 transistor Broken power transistor starts error The compressor is stopped ON 5 time 5 time E36 Over heat of ce osi ee aie When the of discharge pipe sensor exceeds the set value flash flash compressor valves closed The air conditioner stops When there is ignal bet the indoor PCB and outdoor PCB fi ON 6 time 6 time 5 Error of signal PE Pi supply 10 soos Ur lodge when the power is cued or when fiers i i flash flash transmission Broken signal Wire delective signal for 7 minute 35 seconds or longer during operation the asm Mas door outdoor PCB 100009010007 compressor is stopped ON 7 time ON E48 Outdoor fan Defective fan motor poor When the outdoor unit s fan motor speed continues for 30 seconds or flash motor error connector connection longer at 75 rpm or lower 3 times The air conditioner stops Coolinz hish Overload operation overcharge Keeps 2 time mS UE Broken outdoor heat exchange When the value of the outdoor heat exchanger sensor exceeds the set ON flashing flash E 35 pressure sensor wire value protecton Service valve is closed n 1 i Defective compressor If the compressor motor s magnetic pole positions cannot be correctly aoe anme 60 Rotor lock Open phase on compressor detected when the compressor starts as as as Defective outdoor PC
83. th is turned on power is turned on YES Proceed to the indoor printed If the package components circuit board check are not damaged replace Is there a reception sound emitted from the NO SIRE unit when it is operated by the remote controller YES Replace the indoor printed Proceed to the wireless remote circuit board and perform an controller troubleshooting pro operation check cedure 4 Troubleshooting procedure If the air conditioner runs Confirm the contents of the customer complaint NO The cause of the trouble can YES be specifically identified y Check the self diagnosis display Eliminate the cause of the trouble and perform an See page 71 operation check Is an error code displayed by Using Service mode access the self diagnosis the self diagnosis function displays generated in the past YES See pages 72 75 YES Is there a history of self diagnosis display items NO Using the Service mode access the stop history due to protection control generated in the past See pages 72 75 YES Is there a history of stops due to protection control NO 1 Identify the faulty component by using the check procedure corresponding to the content of the trouble Replace the faulty component then perform an The air conditioning system is operating normally operation check
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85. 2 30 2 24 212 2 09 2 29 2 24 210 2 07 2 28 2 23 2 08 2 05 2 27 2 22 2 06 2 03 2 26 2 21 2 04 2 02 2 25 2 20 1 99 2 00 2 23 2 19 Hi 1 94 1 98 2 23 2 18 11 5 1 90 1 97 2 21 2 18 m min 1 85 1 94 2 20 2 16 1 79 1 90 2 19 215 1 74 1 85 2 18 2 14 1 69 1 80 2 16 243 1 66 1 77 2 16 212 1 63 1 74 2 15 211 1 58 1 68 211 2 10 Model 5 2521 5 Outdoor air temp 21 CDB 14 CWB Cool Mode 23 CDB 16 CWB Indoor air temp 28 CDB 20 CWB 31 CDB 22 CWB 33 CDB 24 CWB SHC SHC Tc SHC TC SHC Hi 12 0 m min 15 CWB 1 54 1 51 147 141 10 CWB 1 74 171 1 69 1 61 6 CWB 10 CWB 15 CWB Heat Mode outdoor air temp 20 CWB 3 18 indoor air temp 16 CDB 18 CDB 20 CDB 22 CDB 2 69 2 65 2 88 2 81 2 67 2 63 2 86 2 80 2 64 2 61 2 85 2 79 m min Model SRK35ZIX S Outdoor air temp 21 CDB 14 CWB Cool Mode 23 CDB 16 CWB Indoor air temp 28 CDB 20 CWB 31 CDB 22 CWB 33 CDB 24 CWB TC SHC TC SHC Tc SHC TC SHC Hi 13 0 m min
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89. Data older than the 10th previous occasion are erased Important In cases where transient stop data only are generated the air conditioner system may still be normal However if the same protective stop occurs frequently 3 or more times it could lead to customer complaints Stop data b Service mode display procedure Start When the optional wired remote control is used When the service mode is effective and the optional wired remote controller is used the signal from the wired remote controller won t be received Use the self diagnostic function with i the wireless remote controller Turn off the air conditioner s power once then wait 1 minute or longer Turn the air conditioner s power on again while pressing the unit ON OFF button NOCD t If the buzzer does not sound no matter how Did a buzzer located in many times you repeat the operation the the indoor unit sound unit ON OFF button may be faulty YES Within 1 minute after turning the air conditioner s 2 Set the remote controller settings on Cool power on signals will be sent from the remote ing Operation Fan Speed MED and Set controller C Temperature 21 C Count the number of times the RUN light and TIMER light flash and check the contents of the error etc from the table See page 75 NO Turn off the air conditioner
90. s power to terminate the Are other data displayed service mode If you are going to turn the power on again wait 1 minute or longer after turning it off YES Change the remote controller settings based on the instructions in the table See page 73 3 To count the number of flashes in the service mode count the number of flashes after the light lights up for 1 5 second initially start signal The time that the light lights up for 1 5 second start signal is not counted in the number of flashes In the case of current cut example stop code 42 The RUN light 10 s digit flashes 4 times and the TIMER light 1 s digit flashes 2 times 4X 10 2 X 1 42 From the table read the instructions for error code 42 current cut 1 5 sec ON RUN light 10 digit TIMER light 1 s digit 11 second interval gt 4 When in the service mode when the remote controller settings operation switching fan speed switching temperature setting are set as shown in the following table and sent to the air conditioner unit the unit switches to display of service data 1 Self diagnosis data What are Self These are control data reasons for stops temperature at each sensor remote controller information diagnosis Data from the time when there were error displays abnormal stops in the indoor unit in the past Data from up to 5 previous occasion
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93. 102rps 30 115rps 12 106rps 12 120rps MED 30 66rps 30 72rps 30 76rps 12 74rps 12 90rps LO 30 40rps 30 42rps 30 46rps 12 42rps 12 58rps When the defrosting protection device etc is actuated operation is performed in the corresponding mode b Hot keep operation If the hot keep operation is selected during the heating operation the indoor blower is controlled based on the temperature of the indoor heat exchanger Th2 to prevent blowing of cool wind 3 Defrosting operation a Starting conditions Defrosting operation can be started only when all of the following conditions are met 1 After start of heating operation When it elapsed 45 model 50 60 35 minutes Accumulated compressor operation time 2 After end of defrosting operation When it elapsed 45 model 50 60 35 minutes Accumulated compressor operation time 3 Outdoor heat exchanger sensor TH1 temperature When the temperature has been below 5 C for 3 minutes continuously 4 The difference between the outdoor air sensor temperature and the outdoor heat exchanger sensor temperature The outdoor air temperature 0 C model 50 60 2 C 7 C or higher 15 C The outdoor air temperature lt 0 C model 50 60 lt 2 C 4 15 x The outdoor air temperature 7 C or higher The outdoor air temperature lt 15 C 5 C or higher 5 During continuous compressor operation In addition when the speed command from the indoor controller
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95. 76 cmHg 17 0 1 3 8 76 cmHg 38 kgf cm In order to prevent any other refrigerant from being charged accidentally each port of the manifold has been changed in shape Table 12 Differences in port size between conventional manifold and that for RA10A Conventional manifold Manifold for R410A Portsize 7 16 UNF 1 2 UNF 20 threads per inch 20 threads per inch b Charge hose As R410A is characterized by high pressure the pressure resistance of the charge hose has been increased The material has also been changed to an HFC resistant type and as in the case of each port of the manifold the hose cap size has been changed Furthermore for prevention of gas pressure reaction a charge hose with a valve placed near the cap is also available Table 13 Differences between conventional charge hose and that for R410A Conventional charge hose Charge hose for R410A Pressure Normal pressure 3 4 MPa 34 kgf cm 5 1 MPa 51 kgf cm resistance Breaking pressure 17 2 MPa 172 kgf cm 27 4 MPa 274 kgf cm Engineering material NBR rubber 2 INBE tubes internally coated with nylon Cap size 7 16 UNF 1 2 UNF P 20 threads per inch 20 threads per inch c Electronic balance for refrigerant charging As R410A belonging to the HFCs features high pressure and high evaporating speed when R410A is charged by using charging cylinder R410A in the cylinder cann
96. Heat exchanger sensor Tho 190 96 35 Model SRK50ZIX S 60ZIX S Indoor unit ri connection X4 Gas Room temp exchanger 912 7 sensor sensor Th1 Th23 1 1 Heat Humidity X exchanger sensor Th3 618 Heat exchanger sensor i i Th21 Liquid enn KK Flare connection V Service valve Gas pipie der Heat 99 52 Check joint Liquid Service valve pipe Liquid 96 35 pane 35ZIX S Outdoor unit Service valve Strainer Outdoor unit Service valve Strainer Discharge pipe temp sensor TH3 tre Compressor Discharge pipe temp sensor Compressor gt Electronic expansion valve EEV Capillary tube Electronic expansion valve EEV Capillary tube lt Cooling cycle Heating cycle Accumlator gt Strainer q 4 Cooling cycle Heating cycle Muffler Capillary tube Capillary tube Outdoor air temp sensor TH2 Heat exchanger Heat exchanger sensor TH1 Outdoor air temp sensor TH2 Heat exchanger Heat exchanger sensor TH1 1 3 Noise level Model SRK20ZIX S Indoor Unit SRK20ZIX S Noise 39 dB A Level 38 dB A Sound Pressure Level dB Outdoor Unit s
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99. after a delay time of 3 minutes 11 Outdoor unit failure This is a function for determining when there is trouble with the outdoor unit during air conditioning The compressor is stopped if any one of the following in item a b is satisfied Once the unit is stopped by this function it is not restarted a When the input current is measured at 1 A or less for 3 continuous minutes or more b Ifthe outdoor unit sends a 0 rps signal to the indoor unit 3 times or more within 20 minutes of the power being turned on 12 Indoor fan motor protection When the air conditioner is operating and the indoor fan motor is turned ON if the indoor fan motor has operated at 150 rpm or under for more than 30 seconds the unit enters first in the stop mode and then stops the entire system 13 Serial signal transmission error protection a Purpose Prevents malfunction resulting from error on the indoor lt gt outdoor signals b Detail of operation If the compressor is operating and a serial signal cannot be received from the indoor control with out door control having serial signals continues for 7 minute and 35 seconds the compressor is stopped After the compressor has been stopped it will be restarted after the compressor start delay if a serial signal can be received again from the indoor control 14 Rotor lock If the motor for the compressor does not turn after it has been started it is determined that a compressor lock has occurred
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101. for 3 minutes when the temperature is in the range of 90 100 C model 50 95 105 C the speed is raised by rps and kept at that speed for 3 minutes This process is repeated until the command speed is reached 4 Lower limit speed Model Cooling Heating 2535 20ms 30 rps 50 25 rps 32 rps Lower limit speed 2 Ifthe temperature of 110 C model 50 115 C is detected by the sensor on the discharge pipe then the compressor will stop immediately When the discharge pipe temperature drops and the time delay of 3 minutes is over the unit starts again within hour but there is no start at the third time 9 Current safe a Purpose Current is controlled not to exceed the upper limit of the setting operation current b Detail of operation Input current to the converter is monitored with the current sensor fixed on the printed circuit board of the outdoor unit and if the operation current value reaches the limiting current value the compressor command speed is reduced If the mechanism is actuated when the compressor command speed is less than 30 rps the compressor is stopped immediately Operation starts again after a delay time of 3 minutes 10 Current cut a Purpose Inverter is protected from overcurrent b Detail of operation Output current from the inverter is monitored with a shunt resistor and if the current exceeds the setting value the compressor is stopped immediately Operation starts again
102. io 12 13 14 15 16 17 18 19 2 20 21 22 23 2425 26 27 28 29 3 32 33 35 36 37 38 39 No 4 40 41 42 43 44 45 46 47 48 49 does not sound 5 50 51 52 53 54 55 56 57 58 59 6 60 61 62 63 64 65 66 67 68 69 7 70 71 72 73 74 75 76 77 78 79 8 so 81 82 83 84 85 86 87 88 89 9 91 92 93 94 95 96 97 98 99 If no data are recorded error code is normal the display for each sensor becomes as shown below Sensor name Sensor value displayed when the error code is normal Room temperature sensor 64 C Indoor heat exchanger sensor 64 C Outdoor air temperature sensor 64 C Outdoor heat exchanger sensor 64 C Example Room temperature indoor heat exchanger outdoor air temperature outdoor heat exchanger 9 C If the temperature is lt 0 the buzzer sounds If the temperature is 0 the buzzer does not sound ON Buzzer sound OFF 1 5 sec RUN light 10 s digit OFF ON TIMER light 178 digit OFF 11 second interval f Discharge pipe sensor table Units C TIMER light 1 s digit 10 s digit TES EE S WE E MESE 9 Buzzer sound 3 60 62 64 Yes 2 40 42 44 46 48 50 52 54 56 58 sounds for 0 1 second 1 20 22 24
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104. more Vacuum gauge check Gas side Check joint Service hose x Gauge When the system has ini ist i en tne system nas remaining moisture manifold inside or leaky point the vacuum gauge indicator will rise Check the system for a leaky point and then draw air to create a vacuum again 1 Do not use the refrigerant pressure to expel air 2 Do not use the compressor for evacuation 3 Do not operate the compressor in the vacuum condition G Refrigerant cylinder 0 Refrigerant charge a b c d e f g h i G Discharge refrigerant entirely from the unit and evacuate the unit Note Addition of refrigerant without evacuation is unreasonable because it will result in low charge or overcharge Keep the gauge manifold and connect a refrigerant cylinder to the unit Record the weight of the refrigerant cylinder on the balance This is necessary for making sure of the charged refrigerant amount Purge air from the charge hose Firstly loose the connecting portion of the charge hose amp at the gauge manihold side and open the valve 3 for a few seconds and then immediately retighten it after observing that gas is blow out from the loosened portion Open the valve 1 and after discharging air from the charge hose 4 then the liquid refrigerant begins flowing from the cylinder into the unit Be sure to erect the refrigerant cylinder upright to let liquid ref
105. outdoor control having serial signals continues for 7 minute and 35 seconds the compressor is stopped After the compressor has been stopped it will be restarted after the compressor start delay if serial signal can be received again from the indoor control 14 Rotor lock If the motor for the compressor does not turn after it has been started it is determined that a compressor lock has occurred and the compressor is stopped 15 Outdoor fan motor protection If the outdoor fan motor has operated at 75 rpm or under for more than 30 seconds the compressor and fan motor are stopped 16 Outdoor fan control at low outdoor temperature Cooling a Operating conditions When the outdoor air temperature TH2 is 22 C or lower continues for 30 seconds while the compressor command speed is other than 0 rps b Detail of operation After the outdoor fan operates at A speed for 60 seconds the corresponding outdoor heat c a b c exchanger temperature shall implement the following controls e Value of A Outdoor fan Outdoor temperature gt 10 C 2nd speed Outdoor temperature S 10 C Ist speed 1 Outdoor heat exchanger temperature lt 21 After the outdoor fan speed drops down to 1 speed for 60 seconds if the outdoor heat exchanger temperature is lower than 21 C gradually reduce the outdoor fan speed by 1 speed Lower limit 1st speed 2 21 lt Outdoor heat exchanger temper
106. outlets ARS ARS Upper air outlet ligh BF ligh S 2 Auto air outlet selection a COOL DRY operation 1 In case both lower and upper outlets operation is selected in Cooling or Dry operation both outlets will be kept for sixty minutes after the start or until indoor temperature is below the setting point And then the air outlet will change to the upper outlet That state will be maintained until switch is turned off 2 In case both outlets operation with Auto fan speed mode is selected the upper outlet will be kept for ten minutes after the start or until indoor temperature is close to reaching the setting point And then the air outlet will change to both outlets in order to spread comfort air to every corner b HEAT operation 1 In case both lower and upper outlets operation with Auto fan speed mode is selected the lower outlet will be kept for twenty minutes after the start or until room temperature is close to reaching the setting point And then the air outlet will change to both outlets That state will be maintained until the switch is turned off 2 Automatic adjustment of lower air outlet direction prevents stirring up of warm air and keeps optimum comfort at floor level 2 6 7 Timer operation 1 Comfortable timer setting ON timer If the timer is set at ON when the operation select switch is set at the cooling or heating or the cooling or heating in auto mode operation is selected the comfortable t
107. position 3 4 c Place the handle Lo in the fully opened position 5 and turn on the vacuum pump s power switch During this step perform evacuating about 10 15 minutes for the evacuating time refer to the equipment manufacturer s manual d When the compound gauge s pointer has indicated 101 kPa 755 mmHg place the handle Lo in the fully closed position 5 and turn OFF the vacuum pump s power switch Keep this state for 1 2 minutes and ascertain that the compound gauge s pointer does not return e Fully open the service valves 3 4 f Detach the charge hoses 1 2 g Tightly secure the cap on the service port 7 h After securing the caps on the service valves check the caps periphery if there is any gas leakage 3 4 6 Compound pressure Gauge manifold 10kPa gauge 755mmHg Handle Lo Handle Hi always closed CD Charge hose Charge hose Vacuum pump adapter Vacuum pump Service valve 2 way Caution Be sure to use the vacuum pump vacuum pump adapter and gauge manifold to refer to their instruction manuals beforehand Ascertain that the vacuum pump is filled with oil to the level Service port Service valve designated on the oil gauge 3 way Fig 6 Configuration of air purge by vacuum pump 2 Additional refrigerant charging required for refrigerant piping length longer than standard length The following steps should be taken following the
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109. recovering equipment and the recover ing cylinder b Detach the recovering cylinder charged with refrigerant and store it as required by law 4 4 2 Accessories tools In order to carry out R410A recovery a variety of accessories tools are required Shown below are standard accessories 1 Recovering cylinder Use a recovering cylinder designated by the equipment manufacturer A detachable cylinder must be such that it complies with the laws and regulations concerned Do not use an ordinary cylinder as a recovering cylinder Note 1 A cylinder available when R410A was purchased is a borrowed one Note 2 As a cylinder available when R410A was purchased is provided with a check valve it cannot be used as a recovering cylinder Types by function Valve for liquid lt Valve for liquid the tube is inserted to a level close to the cylinder bottom Valve for gas alve for gas for gas releasing r4 Signal Liquid Liquid a Float a Basic type b 2 port valve type c Float type special l port valve Capable of delivering cylinder Can be used for liquid R410A or With a built in float R410A recovery releasing gas in the signal for prevention of Inverted when upright position overcharging delivering liquid Convenient for R410A servicing Fig 8 Cylinder types Caution It is prohibited by law to recover R410A into a throw away service can or one way cylinder 2 Drier
110. step e in 1 above See Fig 7 a Set the refrigerant cylinder to the electronic balance and connect the connecting hoses on the cylinder and electronic balance s connecting port Caution Be sure to make setting so that liquid can be charged When using a cylinder equipped with a siphon liquid can be charged without turning it upside down b Connect the gauge manifold s charge hose to the electronic balance s connecting port 3 c Open the refrigerant cylinder s valve and after opening the charging valve a little close it 1 2 d After making zero 0 adjustment open the charging valve and by opening the gauge manifold s valve Lo charge the liquid refrigerant 2 5 Before handling the electronic balance refer to its instruction manual e When the designated amount of refrigerant could not be charged make additional charging bit by bit by cooling operation for the amount of each addition follow the instruction manual prepared by the equipment manufacturer If the first additional charging was not enough make the second additional charging after about one minute in the same manner as the first addi tional charging Caution Be sure never to charge a large amount of liquid refrigerant at once to the unit in cooling mode since liquid is charged from the gas side 101 f After charging liquid refrigerant into the air conditioner by closing the charging valve stop operation by fully closing the g
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112. than 62 rps defrost operation is started b Ending conditions Operation returns to the heating cycle when either one of the following is met 1 Outdoor heat exchanger sensor TH1 temperature 13 C model 50 10 C or higher 2 Continued operation time of defrosting For more than 15 min 2 6 9 Outline of cooling operation 1 Operation of major functional components in Cooling mode Cooling Thermostat ON Thermostat OFF Failure Compressor ON OFF OFF Indoor fan motor ON ON OFF Outdoor fan motor ON few seins ON few eae ON 4 way valve 2 Detail of control in each mode Pattern a Fuzzy operation During the fuzzy operation the air flow and the compressor speed are controlled by calculating the difference between the indoor temperature setting correction temperature and the retum air temperature Model SRF25ZIX S SRF35ZIX S SRF50ZIX S Fan speed Auto 20 72rps 20 104rps 12 86rps HI 20 72rps 20 104rps 12 86rps MED 20 48rps 20 70rps 12 58rps LO 20 34rps 20 46rps 12 38rps 2 6 10 Outline of automatic operation 1 Determination of operation mode The unit checks the indoor temperature and the outdoor air temperature determines the operation mode and then begins in the automatic operation Cooling 275 25b e Dehumidifying Indoor air temperature 19 5 ri PROS PPTPO ZI UI Heating 1 1 18 30 Outdoor air temperature 2 The un
113. to connect the copper pipes cannot be used for pipings whose outer diameter exceeds 20 mm In such a case socket joints can be used Sizes of flare pipe ends flare joint ends and flare nuts are as shown in Tables 5 8 see page 94 95 below Also union half union Tee type union and elbow type union shapes are generally used see Fig 1 Half union Half elbow Fig 1 Flare joints 5 Socket joints Socket joints are such that they are brazed for connections and used mainly for thick pipings whose diameter is larger than 20 mm Thicknesses of socket joints are as shown in Table 4 Socket elbow type and tee type shapes are generally used see Fig 2 Table 4 Minimum thicknesses of socket joints Nominal Reference outer diameter Minimum joint thickness diameter of copper pipe jointed mm mm 1 4 6 35 0 50 3 8 9 52 0 60 1 2 12 7 0 70 Socket Socket with different diameter Tee Tee with different diameter Fig 2 Socket joints 4 2 2 Processing of piping materials When performing the refrigerant piping installation care should be taken to ensure that water or dust does not enter the pipe interior that no other oil other than lubricating oils used in the installed air conditioner is used and that refrigerant does not leak When using lubricating oils in the piping processing use such lubricating oils whose water content has been removed When stored be sure to seal the container with an a
114. tools b Vacuum pump g Hole core drill 665 70 Torque wrench h Hexagonal wrench opposite side 4 or 5 mm a oi 16 N m for 1 4 opposite side 17 mm x 160 kefcm i Spanner or monkey wrench for 1 4 opposite side 17 mm x 18 Nm j Tape measure 180 kgf cm for 3 8 opposite side 22 mm x 42 Nm k Thermometer 420 kgf em Pipe cutter 1 Clamping ampere meter Reamer m Insulation resistance tester mega tester Screwdriver n Electro circuit tester Hacksaw Pipe bender 3 Applicability of R410A tools to R22 model Table 15 Applicability of R410A tools to R22 model Tools for R410A Applicable to R22 model a Gauge manifold X b Charge hose x c Electronic balance for refrigerant charging d Torque wrench nominal diameter 1 2 5 8 x e Flare tool clutch type f Gauge for projection adjustment g Vacuum pump adapter h Refrigerant cylinder X 1 Charge port and packing for refrigerant cylinder X j Gas leakage detector X Used when conventional flare tool clutch type is used Note For inquiry contact your agent 100 4 3 2 New installation work when using new refrigerant piping 1 purge by vacuum pump and gas leakage inspection see Fig 6 a Connect the charge hose to the outdoor unit 1 b Connect the charge hose to the vacuum pump adapter 2 At this time keep the service valves in the fully closed
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116. when normal 20 MQ or higher 4 White Black 20 MQ or higher Red O Notes 1 Remove the fan motor and measure it without power connected to it 2 If the measured value is below the value when the motor is normal it means that the fan motor is faulty C Power transistor inspection procedure Use a tester with a needle indicator for the inspection Do not use a digital tester Check in the AC 300 volt range 1 If there is a self diagnosis display inspect the compressor system burns wiring mistakes etc If no problems are found check the output of the power transistor 2 Output inspection procedure Disconnect the terminals for the compresseor If an output such as the one shown in the figure on the below can be measured the power transistor and the circuit board for the outdoor unit are normal Example RUN light ON Output voltage TIMER light 2 time flash am mum 8 10 a 1 sec 3 min 1 sec 3 min 1 sec w He J Operation SW ON Measure in this section 11 How to make sure of remote controller Defective remote controller Is remote controller normal Replace the display Again pushing operating switch Is the unit operable with remote controller Defective remote controller Note 1 Check method of remote controller a Press the reset switch of the remote controller b Ifall LCD are displa
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120. 0 0 5 0 5 1 0 1 0 1 5 1 2 12 7 0 8 0 0 5 0 5 1 0 1 5 2 0 Fig 4 Relations between flare nut and flare seal surface Table 7 Flare and flare nut dimensions for R410A unit mm Nominal Outer diameter Thickness Dimension mm Flare nut width diameter mm mm A B C D 1 4 6 35 0 8 9 1 9 2 6 5 13 17 3 8 9 52 0 8 13 2 13 5 9 7 20 22 1 2 12 7 0 8 16 6 16 0 12 9 23 26 Table 8 Flare and flare nut dimensions for R22 unit mm Nominal Outer diameter Thickness Dimension mm Flare nut width diameter mm mm B C D 1 4 6 35 0 8 9 0 9 2 6 5 13 17 3 8 9 52 0 8 13 0 13 5 9 7 20 22 1 2 12 7 0 8 16 2 16 0 12 9 20 24 2 Flare connecting procedures and precautions a Make sure that the flare and union portions do not have any scar or dust etc b Correctly align the processed flare surface with the union axis c Tighten the flare with designated torque by means of a torque wrench The tightening torque for R410A is same as that for conventional R22 Incidentally when the torque is weak the gas leakage may occur When it is strong the flare nut may crack and may be made nonremovable When choosing the tightening torque comply with values designated by manufac turers Table 9 shows reference values Note When applying oil to the flare surface be sure to use oil designated by the manufacturer If any other oil is used t
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124. 2 y 7 841 ZXNO sd OND pu quvog LINOYID a MS 192738 LXNO 3 __MS 9 9 LJ OL 0313038 S33 T AWIdS1G RWB000Z050 2 Outdoor unit Models SRC25ZIX S 35ZIX S Refer to page 4 Model SRC50ZIX S Refer to page 5 2 2 Piping system Model SRF25ZIX S 3521 5 Indoor unit Flare connection Y X Gas pipie Heat Room temp exchanger 99 52 sensor sensor Th1 Th2 1 1 X exchanger Humidity sensor Th3 Heat exchanger sensor NES Liquid Tha 06 35 e Flare connection V Model SRF50ZIX S Indoor unit Flare Room temp sensor Th Y Humidity sensor Th3 connection exchanger sensor Th25 0 Heat exchanger Heat exchanger sensor _ Th2 Liquid Y X Flare connection Service valve Service valve pipe Liquid 06 35 Cane Outdoor unit Check joint Away valve Service valve Umid Strainer Outdoor unit Gas pipie e Heat 012 7 Check joint Service valve Strainer Discharge pipe temp sensor TH3 m Compressor Electronic expansion valve EEV Capillary tube gt Discharge pipe temp
125. 3 When power failure ocurrs the timer setting is cancelled Once power is resumed reset the timer If the jumper wire J170 AUTO RESTART is cut auto restart is disabled See the diagram at right 7 1 Jumper wire J171 1 6 4 Custom cord switching procedure If two wireless remote controller are installed in one room in order to prevent wrong opera i OM FLAP LOUER _ 1 tion due to mixed signals please modify the printed circuit board in the indoor unit s control arpon a S E c CNG THE 161 16109 box and the remote controller using the following procedure Be sure to modify both boards If only one board is modified receiving and operation cannot be done PAUL CUSTOM 1 Modifying the indoor printed circuit board Oos Take out the printed circuit board from the control box and cut off jumper wire J171 mu etam a using wire cutters m 2 7 3 3c iN After cutting of the jumper wire take measures to prevent contact with the other the lt Y a lead wires etc 2 Modifying the wireless remote controller a Remove the battery Cut b Cut the jumper wire shown in the figure at right 1 6 5 Flap and louver control Control the flap and louver by AIRFLOW UP DOWN and 4 LEFT RIGHT button on the wireless remote controller 1 Flap Each time when you press the AI
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127. 5 60 F Eata N60 PUR Sec NE PEERS CON 50 50 40 40 standard 2x10 30 30 Sound Pressure Level dB 1 121 1 11111 1 1 11 20 20 10 10 125 250 500 1000 2000 4000 8000 Mid Octave Band frequency Hz nN Outdoor Unit SRC35ZIX S Noise 50 dB A Level 50 dB A Xe Cooling O Heating 70 x ELT 70 N70 60 60 50 50 40 40 1 standard 2x10 30 30 Sound Pressure Level dB 20 20 TOT TT Z p Sue a ss 2 E SAM 4 E E E A t o E gt 7 F a 5 1 AS f 10 10 nN 125 250 500 1000 2000 4000 8000 Mid Octave Band frequency Hz Model SRK50ZIX S Condition ISO T1 JIS C9612 Indoor Unit SRK50ZIX S Noise 45 dB A Level 45 dB A Sound Pressure Level dB standard 2x10 Pa nN 125 250 500 1000 2000 4000 8000 Mid Octave Band frequency Hz Outdoor Unit SRC50ZIX S Noise 48 dB A Level 48 dB A Xe Cooling O Heating 70 70
128. 60 50 50 40 40 1 1 11114 1114 111 1 111 11111 standard 2x10 30 30 Sound Pressure Level dB 20 20 EO TT UA 2 N 141 1117 E E n E E 4 4 s 4 rig a P d d gt 7 7 7 7 n n a n n r D 7 7 7 7 7 2 gt D f 7 7 7 T 10 10 nN 125 250 500 1000 2000 4000 8000 Mid Octave Band fequency Hz Model SRF35ZIX S Condition ISO T1 JIS C9612 Indoor Unit SRF35ZIX S Noise 39 dB A Level 39 dB A 70 Xe Cooling O Heating N70 60 E E 60 SERN N60 3 50 50 7 0 standard 2x10 Pa Sound Pressure Level dB 63 125 250 500 1000 2000 4000 8000 Mid Octave Band frequency Hz Outdoor Unit SRC35ZIX S Noise 50 dB A Level 50 dB A Xe Cooling O Heating 70 s 70 4 N70 TR pic MM c a E 60 D a EN MA AM T 4 2 X 40 d 40 J amp S es FE 5 2 30 30 nN 20 20 10 10 63 125 250 500 1000 2000 4000 8000 Mid Octave Band fequency Hz Model SRF50ZIX S Indoor Unit SRF50ZIX S Noise 50 dB A Condition
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130. A desiccant container for removing the water content of R410A A drier should be prepared as expendables Keep the drier sealed just before fitting it Required to protect the R410A recovering equipment 3 Connection hose a Charge port and charge port packing Usually it is sold independently of a refrigerant cylinder a In the case of a two port cylinder the diameter may be special Inquire the manufacture for confirmation Charge port A packing is expendables 104 b Charge hose pressure resistant hose for fluorocarbon and packing It is 1 4B in thickness and available in various lengths etc Use a hose whose pressure resisting performance is higher than 5 2 MPa 52 Generally a setting fixture is provided only on one end 4 Gauge manifold 4 j X Hose ES The most important service tool for refrigeration and air conditioner packing ux 4 Setting fixture Widely used when charging recovering R410A while checking gas pressure Compound gauge Pressure gauge Gauge manifold Charge hose Stop valve 5 Tube piercing valve A tool used to make a hole for recovery in the copper pipe when recovering R410A from equipment which has no port for charging or recovering gas Various types are available on the market and given various names b As the piercing edge tends to wear it is necessary to treat this valve as semi expendables As vacuu
131. B The air conditioner stops 5 time 2 time Active filter When the wrong voltage connected for the power supply flash ON flash E47 voltage error iDeiecuveactve filter When the outdoor PCB is faulty 5 xdi Refrigeration 7 time 2 time cycle system Service valve is closed flash ON flash 57 SONS EN Refrigerant is insufficient When refrigeration cycle system protective control operates control E f wired The wired remote controller wire Y is open The wired remote a E 1 EN 9 hia Broken wired remote controller controller wires X and are reversely connected Noise is penetrating wire defective indoor PCB the wired remote controller lines The wired remote controller or indoor wimg PCB is faulty The communications circuit is faulty Notes 1 The air conditioner cannot be restarted using the remote controller for 3 minutes after operation stops 2 The wired remote controller is optional parts 6 Service mode Trouble mode access function This air conditioner is capable of recording error displays and protective stops service data which have occurred in the past If self diagnosis displays cannot be confirmed it is possible to get a grasp of the conditions at the time trouble occurred by checking these service data a Explanation of terms Term Explanation The service mode is the mode where service data are displayed by flashing of the display lights Service mode NEM when the o
132. HI Outdoor heat exchanger sensor on third previous occasion AUTO Discharge pipe sensor on third previous occasion 28 Cooling AUTO Indoor heat exchanger sensor 2 on third occasion MED Error code on fourth previous occasion Cooling HI Room temperature sensor on fourth previous occasion AUTO Indoor heat exchanger sensor 1 on fourth previous occasion 24 LO Remote controller information on fourth previous occasion MED Outdoor air temperature sensor on fourth previous occasion Heating HI Outdoor heat exchanger sensor on fourth previous occasion AUTO Discharge pipe sensor on fourth previous occasion 29 Cooling AUTO Indoor heat exchanger sensor 2 on fouth occasion MED Error code on fifth previous occasion Cooling HI Room temperature sensor on fifth previous occasion AUTO Indoor heat exchanger sensor 1 on fifth previous occasion 25 LO Remote controller information on fifth previous occasion MED Outdoor air temperature sensor on fifth previous occasion Heating 2 x _ HI Outdoor heat exchanger sensor on fifth previous occasion AUTO Discharge pipe sensor on fifth previous occasion 30 Cooling AUTO Indoor heat exchanger sensor 2 on fifth occasion 21 Stop code on previous occasion 22 Stop code on second previous occasion 23 Stop code on third previous occasion 24 Stop code on fourth previous occasion 25 Stop code on fifth previous occasion Cooling Lo 26 Stop code on sixth previous occasion 27 Stop code on seventh previo
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134. Manual 09 SRK SRF SM 082 updated 25 May 2009 SERVICE MANUAL INVERTER WALL MOUNTED TYPE AND FLOOR STANDING TYPE ROOM AIR CONDITIONER Split system air to air heat pump type Wall mounted type Floor standing type SRK20ZIX S SRF25Z7IX S 2521 5 3521 5 3521 5 50ZIX S 50ZIX S 60ZIX S MITSUBISHI HEAVY INDUSTRIES LTD TABLE OF CONTENTS 1 WALL MOUNTED TY PE SRR reete reiten decedent 2 2 FLOOR STANDING TY PE SRE iiiter coa cicuta reru tue raten 45 3 MAINTENANCE er acie er ceca cu cuu eoru Der ntes aras 69 3 4 Troubleshooting procedures for electrical equipment 69 9 2 Servicing RR 90 4 REFRIGERANT PIPING INSTALLATION SERVICING MANUAL FOR AIR CONDITIONERS USING e 91 4 1 eec 91 4 2 Refrigerant piping installation esse 92 4 3 Installation removal and servicing 98 4 4 Refrigerant recovery nnn 103 1 WALL MOUNTED TYPE SRK CONTENTS 1 1 Electrical wiring 1 2 PIPING ric ibasura 1 3 Noise level 1 4 Sensible heat capacity 1 5 Application data 1 5 1 Installati
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137. Processing the connected parts Q As brazing is molten between the joined surfaces to yield high adhesive strength it is necessary to secure a wide enough space to be joined and also an adequate clearance between the joined surfaces Copper pipe joints minimum insertion depths outer pipe diameters and clearances between outer and inner pipe diameters are as shown in Table 10 In the case of bronze brazing filler when the clearance is about 0 05 0 1mm the pipes can be connected most strongly Table 10 Copper pipe joints minimum insertion depths and clearances B Outer pipe diameter Minimum insertion depth Clearance D B A D x 1 2 mm mm mm 5 8 6 0 05 0 35 8 12 7 0 05 0 35 12 16 8 0 05 0 45 When joining the pipes either the pipe ends are processed or pipes are connected by brazing with a socket joint Brazing filler metal b Alloy brazing filler An alloy mainly composed of silver and copper is used to join iron copper or copper alloy Although it excels in solderability it is relatively expensive Phosphor bronze brazing filler Phosphor bronze brazing filler is generally used to join copper or copper alloy Low temperature solder An alloy of tin and lead An ordinary type of solder Since it is weak in adhesive strength it should not be used for refrigerant pipe brazing Cautions 1 BCuP tends to react with sulphur and produce a fragile compound wa
138. RFLOW UP DOWN button the mode changes as follows q 4 A A 6 A A Y 4 1 ui Flap stopped Swing Angle of Flap from Horizontal Remote controller display Al Al A C COOL DRY FAN Approx 5 Approx 20 Approx 35 Approx 45 Approx 60 HEAT Approx 20 Approx 35 Approx 45 Approx 60 Approx 75 2 Louver Each time when you press the AIRFLOW 4 LEFT RIGHT button the mode changes as follows L p cA a Louver stopped 4M 4 4 V Swing Spot Wide Angle of Louver Remote controller display 44 4 A v Center installation Left Approx 50 Left Approx 20 Center Right Approx 20 Right Approx 50 Right end installation Left Approx 50 Left Approx 45 Left Approx 30 Center Right Approx 20 3 Left end installation Left Approx 20 Center Right Approx 30 Right Approx 45 Right Approx 50 Swing a Swing flap b Swing louver Flap moves in upward and downward Louver moves in left and right directions continuously directions continuously Topertion hCOR Y FANpertion 3 Approx lt 7 S Approx 6 4 Memory flap Flap or Louver stopped When you press the AIRFLOW UP DOWN or LEFT RIGHT button once while the flap or louver is operating it stops swinging at t
139. ach 20 seconds When the indoor heat exchanger temperature is in the range of C D C the speed is reduced by 8 rps at each 20 seconds When the temperature is D C or higher continues for 1 minute the compressor is stopped When the indoor heat exchanger temperature is in the range of A B C if the compressor command speed is been maintained and the operation has continued for more than 20 seconds at the same speed it returns to the normal heating operation 4 Indoor blower retains the fan tap when it enters in the high pressure control Outdoor blower is operated in accordance with the speed e Temperature list Models 25 35 Unit C A B D RPSmin lt 50 48 53 55 58 50 lt RPSmin lt 104 48 5 56 58 61 104 lt RPSmin 42 1 44 47 3 61 Model 50 Unit C A B D RPSmin lt 88 48 5 56 58 61 88 lt RPSmin lt 108 44 51 5 53 5 56 5 108 lt RPSmin 39 46 5 48 5 51 5 Note 1 RPSmin The lower one between the outdoor speed and the compressor command speed 6 Heating overload protective control a Operating conditions When the outdoor air temperature TH2 is 22 C model 50 17 C or higher continues for 30 seconds while the compressor command speed other than 0 rps b Detail of operation 1 2 3 4 5 Taking the upper limit of compressor command speed range at 60 rps model 50 50 rps if the output speed obtained with the fuzzy calculation exceeds the upper limit t
140. and the compressor is stopped 15 Outdoor fan motor protection If the outdoor fan motor has operated at 75 rpm or under for more than 30 seconds the compressor and fan motor are stopped 16 Outdoor fan control at low outdoor temperature Cooling a Operating conditions When the outdoor air temperature TH2 is 22 C or lower continues for 30 seconds while the b c a b c compressor command speed is other than 0 rps Detail of operation After the outdoor fan operates at A speed for 60 seconds the corresponding outdoor heat exchanger temperature shall implement the following controls e Value of A EMEN Outdoor fan Outdoor temperature gt 10 C 2nd speed Outdoor temperature lt 10 C Ist speed 1 Outdoor heat exchanger temperature lt 21 C After the outdoor fan speed drops down to 1 speed for 60 seconds if the outdoor heat exchanger temperature is lower than 21 C gradually reduce the outdoor fan speed by 1 speed Lower limit 1st speed 2 21 lt Outdoor heat exchanger temperature lt 38 C After the outdoor fan speed maintains at A speed for 20 seconds if the outdoor heat exchanger temperature is 21 C 38 C maintain outdoor fan speed 3 Outdoor heat exchanger tempeature gt 38 C After the outdoor fan speed rises up to 1 speed for 60 seconds if the outdoor heat exchanger temperature is higher than 38 C gradually increase outdoor fan speed by 1 speed Upper limit 3rd speed
141. at exchanger sensor 2 Remote controller setting Indicates the number of occasions previous to the present Temperature setting the error display data are from 26 C 1 time previous previous time 27 C 2 times previous 28 C 3 times previous 29 C 4 times previous 30 C 5 times previous Example Remote controller setting Operation Fan speed Temperature Displayed data switching switching setting Cooling MED 21 C Displays the reason for the stop error code the previous time an error was displayed 22 C Displays the reason for the stop error code 2 times previous when an error was displayed 23 C Displays the reason for the stop error code 3 times previous when an error was displayed 24 C Displays the reason for the stop error code 4 times previous when an error was displayed 25 C Displays the reason for the stop error code 5 times previous when an error was displayed 2 Stop data Remote controller setting Operation Fan speed Temperature Displayed data switching switching setting Cooling LO 210 isplays the reason for the stop stop code the previous time when the air conditioner was stopped by protective stop control 22 6 isplays the reason for the stop stop code 2 times previous when the air conditioner was stop
142. ature lt 38 C After the outdoor fan speed maintains at A speed for 20 seconds if the outdoor heat exchanger temperature is 21 C 38 C maintain outdoor fan speed 3 Outdoor heat exchanger tempeature gt 38 C After the outdoor fan speed rises up to 1 speed for 60 seconds if the outdoor heat exchanger temperature is higher than 38 C gradually increase outdoor fan speed by 1 speed Upper limit 3rd speed Reset conditions When either of the following conditions is satisfied 1 The outdoor air temperature TH2 is 25 C or higher 2 The compressor command speed is 0 rps Heating Operating conditions When the outdoor air temperature TH2 is 4 C or lower continues for 30 seconds while the compressor command speed is other than 0 rps Detail of operation The outdoor fan is stepped up by 2 speed step at each 20 seconds Upper limit 8th speed Reset conditions When either of the following conditions is satisfied 1 The outdoor air temperature TH2 is 6 C or higher 2 The compressor command speed is 0 rps 2 FLOOR STANDING TYPE SRF CONTENTS 2 1 Electrical WINO ettet escent 2 2 Piping System oid eere comu 2 3 NOISE I Ne 2 4 Sensible heat capacity erret re cede 2 5 Application data SuSE cose ete 2 5 1 Installation of indoor unit i eire 2 5 2 Installation of outdoor unit
143. auge manifold s valve Lo 2 g Quickly remove the charge hose from the service port 6 When stopped halfway refrigerant being cycled will be released h After securing the caps on the service port and service valve check the caps periphery to see if there is any gas leakage 6 7 Outdoor unit Refrigerant cylinder with syphon Service port Service port 6 Electronic balance for refrigerant charging Fig 7 Configuration of additional refrigerant charging 4 3 3 Removal When using new refrigerant piping 1 Removing the unit a Recovery of refrigerant from the outdoor unit by pump down At the time of pump down use a gauge manifold exclusive for R410A Operating the unit in forced cooling mode recover refrigerant from the outdoor unit For details of reclaiming steps and precautions see the instruction manual prepared by the equipment manufacturer Caution In the case of an outdoor unit which is incapable of pump down use a refrigerant recovery unit b Removing the indoor outdoor units Remove the piping and wiring between the indoor and outdoor units Tighten the outdoor unit s service valves and service port with the specified torque Tighten the capped flare nuts at the indoor outdoor units connecting part with the specified torque Remove the indoor outdoor units Caution When storing the indoor unit piping in its original position be careful not to break the pip
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145. by using a gauge manifold and charge hose 2 When there is no service port port for recovery Make connection in a manner similar to 1 above by using a piercing valve b Connect the refrigerant recovering equipment to the recovering cylinder 103 4 Recovering procedures a According to the instructions for handling the refrigerant recovering equipment described in the attached instruction manual operate the equipment to recover refrigerant b During the operation take care of the following cautions D Ascertain that the refrigerant recovering equipment is running as required and always monitor the state of operation so that adequate steps can be taken in an emergency 2 During the operation remain at work site to ensure safety 3 If you have to leave your work site for any unavoidable reason stop the operation after ascertaining that the recovering cylinder is not overcharged c During the operation if the refrigerant recovering equipment s overcharging prevention mechanism operates and the equip ment stops automatically replace the recovering cylinder with an empty one d Ifthe pressure gauge s reading increases after a short time from the accomplishment of recovery and automatic stoppage of the refrigerant recovering equipment restart the equipment and if it stops again finish the recovery 5 Procedures after recovery a Close the valves on the air conditioner subjected to refrigerant recovery the refrigerant
146. cessories to the refrigerant recovering equipment Preparations for recovering procedures a Installation of refrigerant recovering equipment Install the equipment in a place which satisfies the following requirements as much as possible D Ambient temperature is higher than 0 C and lower than 40 C 2 A flat and dry floor 3 A place as close to the air conditioner as possible b Preparation of recovering cylinder A recovering cylinder should be such that it does not go against prohibitions and is suitable for refrigerant recovered c Connect to the power source d Preparations for air conditioner subjected to refrigerant recovery CD When it is possible to run the air conditioner subjected to refrigerant recovery perform pump down operation so that refrigerant is contained in the outdoor unit condenser side Carry out the pump down operation after confirming the specification of the air conditioner subjected to refrigerant recovery 2 If there is any clogging part ex the electronic expansion valve etc fully open such part Gauge manifold Air conditioner subjected to recovery Refrigerant recovering equipment Intake port Recovering cylinder Connection of refrigerant recovering equipment a Connect the air conditioner subjected to refrigerant recovery to the refrigerant recovering equipment 7 When there is a service port port for recovery Make connection to the service port port for recovery
147. compressor command speed is set to 44 30 rps and even if the speed becomes lower than 44 30 rps the speed is kept to 44 30 rps However when the thermo becomes OFF the speed is reduced to 0 rps 2 The upper limit of the compressor command speed is set to 50 60 rps and even if the calculated result becomes higher than that after fuzzy calculation the speed is kept to 50 60 rps Note 1 Valuesin are for outdoor air temperature is 22 C or 25 C Upper limit 50 rps Lower limit 44 rps ON f Upper limit 60 rps Lower limit 30 rps e Values of A B D Outdoor air temp C i EP A B First time 0 3 22 25 air anre the seconds 7 10 25 28 c Reset conditions When either of the following condition is satisfied 1 2 The outdoor air temperature TH2 is C or higher The compressor command speed is 0 rps 5 Heating high pressure control a Purpose Prevents anomalous high pressure operation during heating b Detector Indoor heat exchanger sensor Th2 c Detail of operation Example Fuzzy Notes 1 Q 3 After lapse of 20 sec or over After lapse of 20 sec or over lower limit After lapse of 20 sec or over eed 30 50 35 ps Indoor unit heat exchanger temperature C When the indoor heat exchanger temperature is in the range of B C C the speed is reduced by 4 rps at e
148. conditioning installation location Press the AIR FLOW 4 LEFT RIGHT button and adjust to the desired location H POWER Each time the AIR FLOW 4 LEFT RIGHT button is pressed the indicator is switched in the order of Soe Right End Installation Center Installation Left End Installation d Press the ON OFF button The air conditioner s installation location is set Press within 60 seconds of setting the installation location while the installation location setting display illuminates Airflow range Airflow range Airflow range Left End Installation Center Installation Right End Installation 1 6 9 Outline of heating operation 1 Operation of major functional components in heating mode Heating Thermostat ON Thermostat OFF Failure Compressor ON OFF OFF Indoor fan motor ON ON HOT KEEP OFF OFF Outdoor fan motor ON few minutes ON OFF OFF 4 way valve ON ON 3 minutes ON 2 Details of control at each operation mode pattern a Fuzzy operation Deviation between the indoor temperature setting correction temperature and the return air temperature is calculated in accordance with the fuzzy rule and used for control of the air capacity and the compressor speed SRK20ZIX S SRK25ZIX S SRK35ZIX S SRK50ZIX S SRK60ZIX S Fan speed Auto 30 94rps 30 102rps 30 115rps 12 106rps 12 120rps HI 30 94rps 30
149. d the outdoor PCB is normal 4 If the expansion valve does not operate no operating sound while voltage is detected the expansion valve is defective Inspection of electronic expansion valve as a separate unit Measure the resistance between terminals with an analog tester Measuring point Resistance when normal 1 6 2 4 46 40 2 3 at 20 C 2 5 b Outdoor unit fan motor check procedure When the outdoor unit fan motor error is detected diagnose which of the outdoor unit fan motor or outdoor PCB is defective Diagnose this only after confirming that the indoor unit is normal 1 Outdoor PCB output check 1 Turn off the power 2 Disconnect the outdoor unit fan motor connector CNFAN 3 When the indoor unit is operated by inserting the power supply plug and pressing ON the backup switch for more than 5 seconds if the voltage of pin 2 in the following figure is output for 30 seconds at 20 seconds after turning ON the backup switch the outdoor PCB is normal but the fan motor is defective If the voltage is not detected the outdoor PCB is defective but the fan motor is normal Note 1 The voltage is output 3 times repeatedly If it is not detected the indoor unit displays the error message Measuring Resistance when point normal DC 308 336V DC 15V DC several V 4 7V DC several V 4 7V Blue Outdoor PCB AX DC several 4 7V
150. d off 2 When power failure ocurrs the timer setting is cancelled Once power is resumed reset the timer 3 Ifthe jumper wire J170 AUTO RESTART is cut auto restart is disabled See the diagram at right C C 8EMOTE AI Sra eae SN L omn Jumper wire J171 2 6 4 Custom cord switching procedure If two wireless remote controller are installed in one room in order to prevent wrong opera i CMR FLAP LUE _ 1 cun FLAP LOUVER fuer gt 16103 1 C tenes tion due to mixed signals please modify the printed circuit board in the indoor unit s control box and the remote controller using the following procedure Be sure to modify both boards 1 e 2 If only one board is modified receiving and operation cannot be done 1 Modifying the indoor printed circuit board m tie 5 D Take out the printed circuit board from the control box and cut off jumper wire 7171 gt a 2G using wire cutters A D CJ 1 88 After cutting of the jumper wire take measures to prevent contact with the other the 5 i lead wires etc 2 Modifying the wireless remote controller a Remove the battery Cut b Cut the jumper wire shown in the figure at right 2 6 5 Flap control Control the flap by AIRFLOW UP DOWN button on the wireless remote contro
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152. digit 1 s digit OFF OFF 0 Normal 5 time 05 Can not receive signals for 35 Power supply is faulty When 35 seconds passes without flash seconds Power supply cables and signal lines are improperly wired communications signals from either the outdoor unit or mE if communic ations have recovered Indoor or outdoor PCB are faulty the indoor unit being detected correctly 3 time 5 time 35 Cooling high pressure control Cooling overload operation When the outdoor heat exchanger sensor s value exceeds flash flash Outdoor unit fan speed drops the set value 5 Outdoor heat exchanger sensor is short circuit 5 times 6 time 36 Compressor overheat Refrigerant is insufficient When the discharge pipe sensor s value exceeds the set flash 110 C model 50 60 115 C Discharge pipe sensor is faulty value 2 times Service valve is closed 7 time 37 Outdoor heat exchanger sensor Outdoor heat exchanger sensor wire is 55 C or lower is detected for 5 seconds continuously 3 times E disconnected An wt n flash is abnormal within 40 minutes after intial detection of this anomalous onnector connections are poor Q Outdoor PCB is faulty temperatur E 3 times Or 55 C higher is detected for 5 seconds continuously within 20 seconds after compressor ON 8time 38 Outdoor air temperature sensor Out air temperature sensor wire is 5seC or lower is detected for 5 seconds continuously 3 times flash z di
153. during heating b Detector Indoor heat exchanger sensor Th2 c Detail of operation Example Fuzzy After lapse of 20 sec or over After lapse of 20 sec or over lower limit 3 After lapse of 20 sec or over speed 30 model 50 60 35 ps Indoor heat exchanger temperature C Notes 1 When the indoor heat exchanger temperature is in the range of B C C the speed is reduced by 4 rps at each 20 seconds 2 When the indoor heat exchanger temperature is in the range of C D C the speed is reduced by 8 rps at each 20 seconds When the temperature is D C or higher continues for 1 minute the compressor is stopped 3 When the indoor heat exchanger temperature is in the range of A B C if the compressor command speed is been maintained and the operation has contin ued for more than 20 seconds at the same speed it returns to the normal heating operation 4 Indoor blower retains the fan tap when it enters in the high pressure control Outdoor blower is operated in accordance with the speed Temperature list Model 20 35 Unit C A B D RPSmin lt 50 48 53 55 58 50 lt RPSmin lt 104 48 5 56 58 61 104 RPSmin 42 1 44 47 3 61 Model 50 60 Unit C A B D RPSmin lt 88 48 5 56 58 61 88 lt RPSmin lt 108 44 51 5 53 5 56 5 108 lt RPSmin 39 46 5 48 5 51 5 Note 1 RPSmin The lower one between the outdoor speed and the compressor command sp
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156. e temperature at which pipes are touchable with finger Completely remove the flux after brazing Reducing valve Flow meter Nitrogen gas Stop valve From the nitrogen cylinder Nitrogen gas Rubber plug for sealing Fig 5 Prevention of oxidation during brazing Cautions during brazing D General cautions 1 The brazing strength should be high as required 2 After operation airtightness should be kept under a pressurized condition 3 During brazing do not allow component materials to become damaged due to overheating 4 The refrigerant pipe work should not be come blocked with scale or flux 5 The brazed part should not restrict the flow in the refrigerant circuit 6 No corrosion should occur from the brazed part 2 Prevention of overheating Due to heating the interior and exterior surfaces of treated metal may oxidize Especially when the interior of the refrigerant circuit oxidizes due to overheating scale occurs and stays in the circuit as dust thus exerting a fatally adverse effect So make brazing at adequate brazing temperature and with a minimum of heating area 3 Overheating protection In order to prevent components near the brazed part from overheating damage or quality deterioration due to flame or heat take adequate steps for protection such as 1 by shielding with a metal plate 2 by using a wet cloth and 3 by means of heat absorbent 4 Movement during brazing Eliminate all vibra
157. e anti frost control operates and the compressor __ flash Indoor heat exchanger sensor is broken wire stops during cooling operation 6 time 86 Heating high pressure control Heating overload operation When high pressure control operates during heating flash Indoor unit fan speed drops operation and the compressor stops Indoor heat exchanger sensor is short circuit Note 1 The number of flashes when in the Service Mode do not include the 1 5 second period when the lights light up at first starting signal See the example shown below In the case of current cut example stop code 42 The RUN light 10 s digit flashes 4 times and the TIMER light 1 s digit flashes 2 times 4x 10 2 1 42 From the table read the instructions for error code 42 Current cut 1 5 sec ON RUN light 10 s digit OFF ON TIMER light 1 s digit OFF 11 second interval 2 Error display Is not displayed automatic recovery only O Displayed If there isa displayed the error display shows the number of times that an auto recovery occurred for the same reason has reached the number of times in Ifno 15 displayed the error display shows that the trouble has occurred once 3 Auto Recovery Does not occur Auto recovery occurs d Remote controller information tables 1 Operation switching 2 Fan speed switching Display pattern when Display pattern when
158. e figure below EGO Lower limit 45 rps E M Normal operation 10 7 Outdoor air temp C c Reset conditions When either of the following condition is satisfied 1 The outdoor air temperature TH2 becomes 7 C 2 The compressor command speed is 0 rps Model 50 60 a Operating conditions When the outdoor air temperature TH2 is lower than 4 C or 13 C or higher continues for 30 seconds while the compressor command speed is other than 0 rps b Detail of operation lower limit compressor command speed is change as shown in the figure below Lower limit 45 rps Lower limit 32 rps Normal operation Outdoor air temp C c Reset conditions When either of the following condition is satisfied 1 The outdoor air temperature TH2 becomes 6 C 11 C 2 The compressor command speed is 0 rps 8 Compressor overheat protection a Purpose It is designed to prevent deterioration of oil burnout of motor coil and other trouble resulting from the compressor overheat b Detail of operation 1 Speeds are controlled with temperature detected by the sensor mounted on the discharge pipe Example Fuzzy After lapse of 3 min or over 4 rps After lapse of 3 min or over imt 4 After lapse of 3 min or over o Lower limit Figures in are for 90 95 100 105 110 115 model 50 60 Discharge pipe temperature C Notes 1 When the discharge pipe temperatur
159. e is in the range of 100 110 C model 50 60 105 115 C the speed is reduced by 4 rps 2 When the discharge pipe temperature is raised and continues operation for 20 seconds without changing then the speed is reduced again by 4 rps 3 Ifthe discharge pipe temperature is in the range of 90 100 C model 50 60 95 105 C even when the compressor command speed is maintained for 3 minutes when the temperature is in the range of 90 100 C model 50 60 95 105 C the speed is raised by 1 rps and kept at that speed for 3 minutes This process is repeated until the command speed is reached 4 Lower limit speed Model Cooling Heating 20 35 20ms 30 rps Lower Limit Speed 50 60 25 rps 32 rps 2 Ifthe temperature of 110 C model 50 60 115 C is detected by the sensor on the discharge pipe then the compressor will stop immediately When the discharge pipe temperature drops and the time delay of 3 minutes is over the unit starts again within 1 hour but there is no start at the third time 9 Current safe a Purpose Current is controlled not to exceed the upper limit of the setting operation current b Detail of operation Input current to the converter is monitored with the current sensor fixed on the printed circuit board of the outdoor unit and if the operation current value reaches the limiting current value the compressor command speed is reduced If the mechanism is actuated when the compresso
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162. ed position 3 Place the handle in the fully opened position and turn ON the vacuum pump s power source For the evacuating time refer to the equipment manufacturer s manual 4 When the compound gauge s pointer has indicated 101 kPa 755 mmHg place the handle Lo in the fully closed position and turn OFF the vacuum pump s power source Keep this state for 1 2 minutes and ascertain that the compound gauge s pointer does not return 5 Charge liquid refrigerant by using the electronic balance according to the steps described in Section 4 3 2 2 See pages101 102 4 4 Refrigerant recovery 4 4 1 Recovering procedures 1 2 3 The following procedures for refrigerant recovery represent general procedures and they may differ between actual cases depend ing upon the type of refrigerant recovering equipment The connecting and handling methods for different type of refrigerant recovering equipment may also differ So ascertain the details by referring to the respective instruction manuals etc Checks prior to recovering procedures a Checking the refrigerant recovering equipment D Gas leakage If there is any malfunction repair it 2 Oil separator Drain the residual oil 3 Recovering equipment weighing function overcharge preventing function float switch moisture indicator drier and other accessory functions should be adjusted or replaced where necessary 4 Electrical circuit b Checking the ac
163. eed 6 Heating overload protective control a Operating conditions When the outdoor air temperature TH2 is 22 C model 50 60 17 C or higher continues for 30 seconds while the compressor command speed other than 0 rps b Detail of operation 1 Taking the upper limit of compressor command speed range at 60 rps model 50 60 50 rps if the output speed ob tained with the fuzzy calculation exceeds the upper limit the upper limit value is maintained 2 The lower limit of compressor command speed is set to 40 rps model 50 60 35 rps and even if the calculated result becomes lower than that after fuzzy calculation the speed is kept to 40 rps model 50 60 35 rps However when the thermo becomes OFF the speed is reduced to 0 prs 3 Inching prevention control is activated and inching prevention control is carried out with the minimum speed set at 40 rps model 50 60 35 rps 4 The outdoor fan is set on 2nd speed 5 The indoor fan is stepped up by 1 speed step Upper limit 8th speed c Reset conditions The outdoor air temperature TH2 is lower than 21 C model 50 60 16 C 7 Heating low outdoor temperature protective control Model 20 35 a Operating conditions When the outdoor air temperature TH2 is lower than 10 C or higher continues for 30 seconds while the compressor command speed is other than 0 rps b Detail of operation The lower limit compressor command speed is change as shown in th
164. emoving capability due to the addition of compounds such as potassium fluoride potas sium chloride and sodium fluoride to the borax boric acid compound Cautions D Remove the flux after brazing 2 When chlorine contained in the flux stays within the pipe the lubricating oil deteriorates So use a flux which does not contain chlorine 3 When adding water to the flux use water which does not contain chlorine e g distilled water or ion exchange water 4 Brazing As brazing requires sophisticated techniques and experiences it must be performed by a qualified person In order to prevent the oxide film from occurring in the pipe interior during brazing it is effective to proceed with brazing while letting dry nitrogen gas N2 flow lt Brazing method for preventing oxidation a b c d e f g Attach a reducing valve to the nitrogen gas cylinder Use a copper pipe to direct the nitrogen gas into the piping and attach a flowmeter to the nitrogen gas cylinder Apply a seal onto the clearance between the piping and inserted pipe for the nitrogen gas in order to prevent the nitrogen gas from flowing backward When the nitrogen gas is flowing be sure to keep the piping end open Adjust the flow rate of nitrogen gas so that it is lower than 0 05m h or 0 02MPa 0 2kgf cm by means of the reducing valve After taking the steps above keep the nitrogen gas flowing until the piping cools down to a certain extent 1
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166. ervice valve close Defective EEV Defective outdoor PCB Is the power supply voltage OK YES Check power supply Proper power supply voltages are as follows At the power supply outlet 220V 198 242V 230V 207 253V 240V 216 264V Is the service valves of the outdoor unit open Open the service valves Adjust the refrigerant amount properly Is the refrigerant amount normal YES Does electronic expansion valve operate properly Defective EEV or outdoor PCB Is the output voltage applied to all 3 phases of power transistor Defective outdoor PCB Judgment of refrigerant quantity 1 Phenomenon of insufficient refrigerant a Loss of capacity b Poor defrosting Frost is not removed completely Is the connector for compressor connection good Correct connection c Longer time of hot keep 5 minute or more Normal time Approx 1 1 minute and 30 seconds For inspection of electronic expansion valve see page89 Is the checked result of insulation resistance and coil resistance k1 of compressor motor OK NO Defective outdoor For the output voltage check of power transistor see page86 1 Model 20 35 1 7030 or more at 20 C Model 50 60 0 953Q or more at 20 C Replace compressor C Outdoor fan motor error Defective fan motor connector EMI D connection defective outdoor PCB Is connector connection good Correct connecto
167. es during TIMER operation ECONO light green Illuminates during ECONOMY operation 2 6 2 Unit ON OFF button When the remote controller batteries become weak or if the remote controller is lost or malfunctioning this button may be used to turn the unit on and off 1 Operation Push the button once to place the unit in the automatic mode Push it once more to turn the unit off 2 Details of operation The unit will go into the automatic mode in which it automatically determines from indoor temperature as detected by sensor Unit ON OFF button whether to go into the cooling thermal dry or heating modes temperature Fan speed Flap Louver Timer Switch operation mode setting Cooling About 24 C Thermal dry About 25 C Auto Auto Continuous Heating About 26 C 2 6 3 Auto restart function 1 Auto restart function records the operational status of the air conditioner immediately prior to be switched off by a power cut and then automatically resumes operations after the power has been restored 2 The following settings will be cancelled Jumper wire 1170 1 CNet FLAP LOUVER i chive FLAP ES CRF HUMIDITY 1108 095 a Timer settings b HIGH POWER operations 16103 Notes 1 Auto restart function is set at on when the air conditioner is shipped from the factory Consult with your dealer if this function needs to be switche
168. fter fuzzy calculation the speed is kept to 30 or 40 SRF50 30 rps However when the thermo becomes OFF the speed is reduced to 0 rps c Reset conditions When either ofthe following condition is satisfied 1 The outdoor air temperature is lower than 40 C or 46 C 2 The compressor command speed is 0 rps Cooling high pressure control a Purpose Prevents anomalous high pressure operation during cooling b Detector Outdoor heat exchanger sensor TH1 c Detail of operation Example Fuzzy After lapse of 30 sec or over After lapse of 30 sec or over lower limit speed 30 rps After lapse of 30 sec or over 53 58 63 Outdoor unit heat exchanger temperature C Notes 1 When the outdoor heat exchanger temperature is in the range of 58 63 C the speed is reduced by 6 rps at each 30 seconds 2 When the temperature is 63 C or higher the compressor is stopped 3 When the outdoor heat exchanger temperature is in the range of 53 58 C if the compressor command speed is been maintained and the operation has continued for more than 30 seconds at the same speed it returns to the normal cooling operation Cooling low outdoor temperature protective control a Operating conditions When the outdoor air temperature TH2 is 22 C or lower continues for 20 seconds while the compressor command speed is other than 0 rps b Detail of operation 1 The lower limit of the
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170. h transistor high side Power transistor is damaged damaged at the time the compressor started Current cut circuit breakdown 3 time 53 Suction pipe sensor Suction pipe sensor wire is 55 C or lower is detected for 5 seconds continuously 3 times flash is abnormal disconnected within 40 minutes after intial detection of this anomalous Multi system only Connector connections are poor temperature 35 Outdoor PCB is faulty Or 55 C higher is detected for 5 seconds continuously 8 times within 20 seconds after compressor ON 7 time 57 Refrigeration cycle system Service valve is closed When refrigeration cycle system protective control Q flash protective control Refrigerant is insufficient operates 3 times 8 time 58 Current safe Refrigerant is overcharge When there is a current safe stop during operation flash Compressor lock I Overload operation 9 time 59 Compressor wiring is unconnection Compressor wiring is disconnected When the current is 1A or less at the time the flash Voltage drop Power transistor is damaged compressor started Low speed protective control Power supply construction is defective When the power supply voltage drops during operation Outdoor PCB is faulty When the outdoor unit s speed is lower than 32 rps for Compressor is faulty 60 minutes 6 time OFF 60 Rotor lock Compressor is faulty After the compressor starts when the compressor stops flash Compressor output is open phase due to roto
171. he lubricating oils may deteriorate and cause the compressor to burn out Table 9 Tightening torque of flare for R410A Reference values 4 2 3 Storage of piping materials 1 Types and storage of piping materials Nominal Outer diameter Tightening torque Tightening torque of torque diameter mm N m kgf cm ers a 1 4 6 35 14 18 140 180 16 160 18 180 3 8 9 52 34 42 340 420 42 420 1 2 12 7 49 61 490 610 55 550 Refrigerant piping materials for air conditioners are broadly classified into the following types Refrigerant piping materials r with heat p insulation without heat insulation with flare processing without flare processing b Copper pipe with insulation General name a Piping set without flare processing c Bare copper pipe bare copper pipe As R410A features pressure about 1 6 times higher than R22 it is necessary to use a copper pipe which has a thickness stated in Table 3 see page 92 and which contains less contaminants It is necessary to carefully treat store copper pipes so that they are not collapsed deformed or damaged Due care must also be exercised so that foreign matters such as dust and water do not enter the pipe interior A piping set s open end is sealed with a cap etc When storing it make sure that it is sealed securely When storing a cladded copper pipe or bare copper pipe securely seal the opening with pinc
172. he position Since this angle is memorized in the microcomputer the flap or louver will automatically be set at this angle when the next operation is started 5 When not operating The flap returns to the position of air flow directly below when operation has stopped 1 6 6 3D auto operation Control the flap and louver by 3D AUTO button on the wireless remote controller Air flow selection and air flow direction are automatically controlled allowing the entire indoor to efficiently conditioned 1 During Cooling and Heating Including auto cooling and heating a Air flow selection is determined according to indoor temperature and setting temperature Air flow selection Operation mode AUTO HI MED LO At cooling Indoor temp Setting temp gt 5 C Indoor temp Setting temp 5 5 C HIGH POWER AUTO Setting temp Indoor temp gt 5 C Setting temp Indoor 5 5 C Hi MED 29 At heating ue HIGH POWER AUTO b Air flow direction is controlled according to the indoor temperature and setting temperature 1 When 3D auto operation starts Cooling Heating Flap Up down Swing Louver 2 Wide fixed Center fixed When Indoor temp Setting temp is 5 C during cooling and when Setting temp Indoor temp is 5 C during heating the system switches to the following air flow direction control After the louver sw
173. he upper limit value is maintained The lower limit of compressor command speed is set to 40 rps model 50 35 rps and even if the calculated result becomes lower than that after fuzzy calculation the speed is kept to 40 rps model 50 35 rps However when the thermo becomes OFF the speed is reduced to 0 prs Inching prevention control is activated and inching prevention control is carried out with the minimum speed set at 40 rps model 50 35 rps The outdoor fan is set on 2nd speed The indoor fan is stepped up by 1 speed step Upper limit 8th speed c Reset conditions The outdoor air temperature TH2 is lower than 21 C model 50 16 C 7 Heating low outdoor temperature protective control Models 20 35 a Operating conditions When the outdoor air temperature TH2 is lower than 10 C or higher continues for 30 seconds while the compressor command speed is other than 0 rps b Detail of operation The lower limit compressor command speed is change as shown in the figure below Lower limit 45 rps s HEP see Normal operation 10 57 Outdoor air temp C c Reset conditions When either of the following condition is satisfied 1 The outdoor air temperature TH2 becomes 7 C 2 The compressor command speed is 0 rps Model 50 a Operating conditions When the outdoor air temperature TH2 is lower than 4 C or 13 C or higher continues for 30 seconds while the compressor command
174. hing taping etc 2 3 Identification b Piping set A copper pipe as piping set for R410A must have a thickness as stated in Table 3 see page 92 and as shown in Tables 5 and 6 see page 94 it also differs from R22 in flare processing and flare nut dimensions So it is necessary to choose a pip ing set suitable for R410A Copper pipe with insulation Before using a copper pipe with insulation make sure that it has a thickness designated for R410A Bare copper pipe It is necessary to use a bare copper pipe which has a thickness designated in Table 3 see page 92 and contains less con taminants As the bare copper pipe surface is naked it is necessary to treat it with exceeding care and adopt a means for identification to prevent improper usage by making it easily discriminable from other piping materials Precautions before installation Observe the following precautions when performing the piping connection at the site a b Keep any open ends of pipes be sealed with a cap etc until connected with the equipment Exercise great care when performing piping installation on a rainy day When water enters into the piping the lubricating oil may deteriorate and cause the equipment to fail Carry out the piping connection in as short a time as possible If the piping is left open for a long period fully purge the interior with nitrogen gas or dry it with a vacuum pump 4 2 4 Brazing 1
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176. imer starts and determines the starting time of next operation based on the initial value of 15 minutes and the relationship between the indoor temperature at the setting time temperature of room temperature sensor and the setting temperature 2 Sleep timer operation Pressing the SLEEP button causes the temperature to be controlled with respect to the set temperature 3 OFF timer operation The Off timer can be set at a specific time in 10 minute units within a 24 hour period 2 6 8 Outline of heating operation 1 Operation of major functional components in heating mode Heating Thermostat ON Thermostat OFF Failure Compressor ON OFF OFF Indoor fan motor ON ON HOT KEEP OFF OFF Outdoor fan motor ON few minutes ON OFF OFF 4 way valve ON ON minutes ON 2 Details of control at each operation mode pattern a Fuzzy operation Deviation between the indoor temperature setting correction temperature and the return air temperature is calculated in accordance with the fuzzy rule and used for control of the air capacity and the compressor speed Model SRF25ZIX S SRF35ZIX S SRF50ZIX S Fan speed Auto 30 102rps 30 115rps 12 110rps HI 30 102rps 30 115rps 12 110rps MED 30 76rps 30 106rps 12 80rps LO 30 58rps 30 80rps 12 60rps When the defrosting protection device etc is actuated operation is performed in the corresponding mode b Hot keep operation If the hot keep operati
177. ing 2 Installing the unit a Proceed with the installation following the steps described in 4 3 2 New installation work 4 3 4 Replacing the unit Never use the existing refrigerant piping Use a brand new refrigerant piping 1 when replacing the air conditioner using the conventional refrigerant R22 with an air conditioner using the alternative refrigerant R410A or 2 even when replacing the air conditioner using the alternative refrigerant R410A with another air conditioner using R410A as a problem may occur due to differences in pressure characteristics of refrig erant or differences in type of lubricating oil air conditioners using R410A do not always use the same type of the lubricating oils 4 3 5 Retrofitting Do not operate the air conditioner which has used the conventional refrigerant R22 by charging the alternative refrigerant R410A Otherwise the equipment may cease to function normally and go wrong or even cause serious problems such as rupture of the refrigeration cycle 102 4 3 6 Refrigerant recharging at servicing When it becomes necessary to recharge refrigerant charge the specified amount of new refrigerant according to the following steps For details see the instruction manual prepared by the equipment manufacturer 1 Connect the charge hose to the outdoor unit s service port 2 Connect the charge hose to the vacuum pump adapter At this time keep the service valves in the fully open
178. ing Fixed Louver W de fed 1 6 7 Timer operation 1 Comfortable timer setting ON timer If the timer is set at ON when the operation select switch is set at the cooling or heating or the cooling or heating in auto mode operation is selected the comfortable timer starts and determines the starting time of next operation based on the initial value of 15 minutes and the relationship between the indoor temperature at the setting time temperature of room temperature sensor and the setting temperature 2 Sleep timer operation Pressing the SLEEP button causes the temperature to be controlled with respect to the set temperature 3 OFF timer operation The Off timer can be set at a specific time in 10 minute units within a 24 hour period 1 6 8 Installation location setting When the indoor unit is installed at the end of a room control the air flow direction so that it is not toward the side walls If you set the remote controller installation position keep it so that the air flow is within the range shown in the following figure 1 Setting a If the air conditioning unit is running press the ON OFF button to stop The installation location setting cannot be made while the unit is running b Press the AIR FLOW UP DOWN button and the AIRFLOW 4 LEFT RIGHT button together for 5 seconds or more Aa MITSUBISHI MITSUBISHI The installation location display illuminates xs E o c Setting the air
179. ings left and right sym metrically for 3 cycles control is switched to the control in 3 Cooling Heating Flap Horizontal blowing Fixed Slant forwardl blowing Fixed Louver 3 Left right Swing Cooling After the flap swings for 5 cycles control is switched to the control in 4 Heating Flap Up down Swing Louver 4 Center Fixed Cooling For 5 minutes the following air flow direction control is carried out Heating Flap Horizontal blowing Fixed Slant forwardl blowing Fixed Louver 3 temperature Operation mode W de Fixed Air flow direction contorol After 5 minutes have passed the air flow direction is determined according to the indoor temperature and setting At cooling Indoor temp Setting temp 2 2 C lt Indoor temp Setting temp 5 C Indoor temp Setting temp gt 5 C The control in 4 continues Control returns to the control in 2 Control returns to the control in 1 At heating Setting temp Indoor temp amp 2 2 C lt Setting temp Indoor temp 5 Setting temp Indoor temp gt 5 C The control in 4 continues 2 During DRY Operation including auto DRY operation Air flow selection Control returns to the control in 2 According to DRY operation Control returns to the control in 1 Flap Horizontal blow
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181. ir s may result in water leakage electric shock and fire etc 4 2 Refrigerant piping installation 4 2 1 Piping materials and joints used 1 For the refrigerant piping installation copper pipes and joints are mainly used Copper pipes and joints suitable for the refrigerant must be chosen and installed Furthermore it is necessary to use clean copper pipes and joints whose interior surfaces are less affected by contaminants Copper pipes It is necessary to use seamless copper pipes which are made of either copper or copper alloy and it is desirable that the amount of residual oil is less than 40 mg 10m Do not use copper pipes having a collapsed deformed or discolored portion especially on the interior surface Otherwise the expansion valve or capillary tube may become blocked with contaminants As an air conditioner using R410A incurs pressure higher than when using R22 it is necessary to choose adequate materials Thicknesses of copper pipes used with R410A are as shown in Table 3 Never use copper pipes thinner than 0 8 mm even when it is available on the market Table 3 Thicknesses of annealed copper pipes Thickness mm Nominal Outer diameter S R410A re R22 diameter mm 1 4 6 35 0 80 0 80 3 8 9 52 0 80 0 80 1 2 127 0 80 0 80 2 Joints For copper pipes flare joints or socket joints are used Prior to use be sure to remove all contaminants a Flare joints Flare joints used
182. irtight cap or any other cover 1 Flare processing procedures and precautions a Cutting the pipe By means of a pipe cutter slowly cut the pipe so that it is not deformed b Removing burrs and chips If the flared section has chips or burrs refrigerant leakage may occur Carefully remove all burrs and clean the cut sur face before installation c Insertion of flare nut d Flare processing Make certain that a clamp bar and copper pipe have been cleaned By means of the clamp bar perform the flare processing correctly Use either a flare tool for R410A or conventional flare tool Flare processing dimensions differ according to the type of flare tool Be careful When using a conventional flare tool be sure to secure dimension A by using a gage for size adjustment Fig 3 Flare processing dimensions Table 5 Dimensions related to flare processing for R410A A mm Nominal Outer diameter Thickness 7 damde mm Flare tool for R410A Conventional flare tool Clutch type Clutch type Wing nut type 1 4 6 35 0 8 0 0 5 1 0 1 5 1 5 2 0 3 8 9 52 0 8 0 0 5 1 0 1 5 1 5 2 0 1 2 12 7 0 8 0 0 5 1 0 1 5 2 0 2 5 Table 6 Dimensions related to flare processing for R22 mm Nominal Outer diameter Thickness 3 Gris Flare tool for R410A Conventional flare tool Clutch type Clutch type Wing nut type 1 4 6 35 0 8 0 0 5 0 5 1 0 1 0 1 5 3 8 9 52 0 8
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184. it checks the temperature every hour after the start of operation and if the result of check is not same as the previous op eration mode changes the operation mode 3 When the unit is started again within one hour after the stop of automatic operation or when the automatic operation is selected during heating cooling or dehumidifying operation the unit is operated in the previous operation mode 4 Setting temperature can be adjusted within the following range There is the relationship as shown below between the signals of the wireless remote controller and the setting temperature Unit C Signals of wireless remote controller Display 6 5 4 3 2 1 0 1 2 3 4 5 6 Cooling 18 19 20 21 22 23 24 25 26 27 28 29 30 tti Setting Dehumidifying 19 20 21 22 23 24 25 26 27 28 29 30 31 temperature Heating 20 21 22 23 24 25 26 27 28 29 30 31 32 2 6 11 Protective control function 1 Frost prevention control During cooling or dehumidifying a Operating conditions 1 Indoor heat exchanger temperature Th2 is lower than 5 C compressor 2 5minutes after reaching the compressor command speed except 0 rps command speed b Detail of anti frost operation tower Indoor heat exchanger limit 7777777 id temperature 5 C or lower 2 5 C or lower speed Lower limit of compressor command speed 22 rps model 50 25 rps 0 rps 0 rps y Protects the fa
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187. ller 1 Flap Each time when you press the UP DOWN button the mode as follows 1 u u u u u Flap soppedl Angle of Flap from Horizontal Remote controller Y 1 1 2 1 display COOL DRY FAN Approx 60 Approx 50 Approx 38 Approx 21 5 Approx 12 HEAT Approx 44 Approx 32 Approx 21 5 Approx 12 Approx 5 2 Swing a Swing flap Flap moves in upward and downward directions continuously T operation nm FANperation Approx 44 x7 Approx 60 Ds 12 N 5 3 Memory Flap stopped When you press the AIRFLOW button once while the flap is operating it stops swinging at the position Since this angle is memo rized in the microcomputer the flap will automatically be set at this angle when the next operation is started 4 When not operating The flap returns to the position of air flow directly below when operation has stopped 2 6 6 Air outlet selection 1 AIR SELECTION button can switch between the combination of upper and lower air outlets and upper air outlet Not operable while the air conditioner is OFF lt a Each time the AIR SELECTION button is pressed The combination of the upper and lower air outlets and the upper air outlet can be switched b When the upper air outlet is selected AIR OUTLET SELECTION light on the unit display area will light green Upper and lower air
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189. m rises air tends to be inhaled from the hole So care must be exercised T Pp pliers Piercing valve 6 Vacuum pump Used to evacuate the recovering equipment and recovering cylinder Exhaust port Suction port INVERTER WALL MOUNTED TYPE AND FLOOR STANDING TYPE ROOM AIR CONDITIONER EA MITSUBISHI HEAVY INDUSTRIES LTD Air Conditioning amp Refrigeration Systems Headquarters 16 5 2 chome Kounan Minato ku Tokyo 108 8215 Japan Fax 03 6716 5926 Because of our policy of continuous improvement we reserve the right to make changes in all specifications without notice updated 24 April 2009
190. n ON TIMER button gt This b 1 ON TIMER i T 528 tton s t tion is button selects operation po 3D AUTO button This button sets 3D AUTO operation SLEEP button OFF TIMER button This button selects SLEEP operation This button selects OFF TIMER operation CLEAN switch ACL switch This switch changes the CLEAN mode This switch is for resetting microcomputer CANCEL button and setting time This button cancels the ON timer OFF This button selects ALLERGEN CLEAR ALLERGEN CLEAR button timer and SLEEP operation operation Unit indication section Model All models Unit ON OFF button This button can be used for turning on off the unit when remote controller is not available Remote controller signal receiver The above illustration shows all controls but in practice only the relevant parts are shown RUN HOT KEEP light green blue lluminates during operation green except ECONO operation blue ECONO operation Blinks when airflow stops due to the HOT KEEP and CLEAN operation 1 5 sec ON OFF k Hi Power 29 OFF d 5 sec auTo mp ess CLEAN operation OFF mS 1 sec 3D AUTO light green Illuminates during 3D AUTO operation HI POWER light green TIMER light yellow Illuminates during HIGH POWER operation Illuminates during TIMER operation 1 6 2 Unit ON OFF button When the remo
191. n tap just before Indoor fan Depends on operation mode 25 5 8 frost prevention control Outdoor fan Depends on command speed Indoor heat exchanger Depends on stop mode 4 way valve OFF temperature C Notes 1 When the indoor heat exchanger temperature is in the range of 2 5 5 C the speed is reduced by 4 rps at each 20 seconds 2 When the temperature is lower than 2 5 C the compressor is stopped 3 When the indoor heat exchanger temperature is in the range of 5 8 C the compressor command speed is been maintained c Reset conditions When either of the following condition is satisfied 1 The indoor heat exchanger temperature Th2 is 8 C or higher 2 The compressor command speed is 0 rps 2 3 4 Cooling overload protective control a Operating conditions When the outdoor air temperature TH2 has become continuously for 30 seconds at 41 C or more or 47 C or more Models 50 60 41 C or more with the compressor running the lower limit speed of compressor is brought up SRF25 3521 5 SRF50ZIX S Item Outdoor air temperature 41 C or more 47 C or more 41 C or more Lower limit speed 30 rps 40 rps 30 rps b Detail of operation 1 The outdoor fan is stepped up by 3 speed step Upper limit 7th model 50 8th speed 2 The lower limit of compressor command speed is set to 30 or 40 SRF50 30 rps and even if the calculated result be comes lower than that a
192. nds continuously 3 times within Keeps 2 time 8 time Outdoor heat wire donee ur F sensor 40 minutes after initial detection of this anomalous temperature E 37 exchanger uh Or 55 C or higher is detected for 5 seconds continuously within 20 flashing flash flash connection 55 sensor error x m seconds after compressor ON Outdoor PCB is faulty The compressor is stopped 5 Broken discharge pipe sensor za m Keeps 4 time 8 time E 39 Discharge pipe wire poor connector 25 C or 15 T for d neus 3 times within 40 flashing flash flash Sensor error co nection minutes after initia etection of this anomalous temperature The compressor is stopped Outdoor PCB is faulty Compressor locking open phase 1 time 1 time E42 Cartent cut on compressor output short The compressor output current exceeds the set value during compressor flash flash circuit on power transistor start Ha service valvedsiclosed The air conditioner stops 4 a When there is an emergency stop caused by trouble in the outdoor unit ON 2 ime E 59 of t n Pro egn compres or Sut or the input current value is found to be lower than the set value as as 5 The air conditioner stops ON 3 time 3 time E58 Current safe 4 over oag operanon When the compressor command speed is lower than the set value and flash flash stop Compres ie locking the current safe has operated the compressor stops
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195. o start operation press again to WOOO AIR FLOW UP DOWN button a 5 5 This button changes the air flow p down direction OFF TIMER button This button selects OFTIMER operation SLEEP button This button selects amp EEP operation CLEAN switch This switch selects the CLEAN mode CANCEL button This button cancels the ON timer OF F timer and amp EEP operation Unit display section Model All models Unit ON OFF button This button can be used for turning on off the unit when remote controller is not available ACL switch This switch is for resetting microcomputer and setting time The above illustration shows all controls but in practice onlyhe relevant parts are shown RUN RUN HOT KEEP light green lluminates during operation HI POWER Blinks when airflow stops due to the HOT Qe KEEP and CLEAN operation HI POWER Light green RT 1 5 sec Illuminates during HIGH POWER operation TIMER HOT KEEP To OFF AIR AIR SELECTION button SELECTION 0 5 sec Use this button to switch between the combination of upper and lower air outlets and upper air outlet AIR OUTLET ec SELECTION D 22 4 AIR OUTLET SELECTION light green CLEAN operation OFF Illuminates during upper air outlet operation EN 1 sec Remote controller signal receiver TIMER light yellow Illuminat
196. of the indoor unit during heating operation has counted 0 rps 10 times or more and all conditions of 1 2 3 and 5 above and the outdoor air temperature is 3 C or less are satisfied note that when the temperature for outdoor heat exchanger sensor TH1 is 5 C or less 62 rps or more 4 C or less less than 62 rps defrost operation is started b Ending conditions Operation returns to the heating cycle when either one of the following is met 1 Outdoor heat exchanger sensor TH1 temperature 13 C model 50 60 10 C or higher 2 Continued operation time of defrosting For more than 15 min 1 6 10 Outline of cooling operation 1 Operation of major functional components in Cooling mode Cooling Thermostat ON Thermostat OFF Failure Compressor ON OFF OFF Indoor fan motor ON ON OFF Outdoor fan motor ON few ON few P ON 4 way valve OFF OFF OFF 2 Detail of control in each mode Pattern a Fuzzy operation During the fuzzy operation the air flow and the compressor speed are controlled by calculating the difference between the indoor temperature setting correction temperature and the return air temperature 6 SRK20ZIX S SRK25ZIX S SRK35ZIX S SRK50ZIX S SRK60ZIX S Fan speed Auto 20 65 20 74rps 20 86rps 12 86rps 12 110rps HI 20 65rps 20 74rps 20 86rps 12 86rps 12 110rps MED 20 44rps 20 55rps 20 58rps 12 62rps 12 86rps LO 20 30rps 20 34rps 20 38rps 12 34rps 12 48rps
197. on is selected during the heating operation the indoor blower is controlled based on the temperature of the indoor heat exchanger Th2 to prevent blowing of cool wind 3 Defrosting operation a Starting conditions Defrosting operation can be started only when all of the following conditions are met 1 After start of heating operation When it elapsed 45 model 50 35 minutes Accumulated compressor operation time 2 After end of defrosting operation When it elapsed 45 model 50 35 minutes Accumulated compressor operation time 3 Outdoor heat exchanger sensor TH1 temperature When the temperature has been below 5 C for 3 minutes continuously 4 The difference between the outdoor air sensor temperature and the outdoor heat exchanger sensor temperature The outdoor air temperature 0 C model 50 2 C 7 C or higher e 15 C The outdoor air temperature lt 0 C model 50 lt 2 C 4 15 x The outdoor air temperature 7 C or higher The outdoor air temperature lt 15 C 5 C or higher 5 During continuous compressor operation In addition when the speed command from the indoor controller of the indoor unit during heating operation has count ed 0 rps 10 times or more and all conditions of 1 2 3 and 5 above and the outdoor air temperature is 3 C or less are satisfied note that when the temperature for outdoor heat exchanger sensor TH1 is 5 C or less 62 rps or more 4 C or less less
198. on of indoor unit ee eere eene 1 5 2 Installation of outdoor unit 1 6 Outline of operation control by microcomputer E How to read the model name Example SR K 50 Z IX S Series code Inverter type Product capacity Wall mounted type Split type room air conditioner iring 1 1 Electrical w 1 Indoor uni Models SRK20ZIX S 2521 5 3521 5 50ZIX S 60ZIX S 34IM 1VN9IS N Z S3YIM YAMOd u 19 M0 9 9A dH enig 19 yd 10109 52 10109 10481 eA yoo q 1 1 osnj yoe1s sd yo IMS 1 09 06 200 iipiung 108098 uoxe jeeu 21241 108095 uoo 1030 191 WI J01ou 4030u de 4 4030Ul Ue J IW 103990007 4N 3N9 0131 10590 w LINN 0001 0 OL ZHOS A Ove 000 95999 99Jnos YSONVHOXA 1V3H 9 U39NVHOX3 v 1082 os NNO f CT TR NZS J HM qu PA n 9 616114
199. or PCB Adjust the refrigerant amount properly Secure space for inlet and outlet Replace compressor Over heat of compressor Gas shortage defective pipe sensor Is discharge pipe sensor Connector connection check resistance resistance value good value check replacement of discharge pipe page 80 sensor YES Is sufficient quantity of refrigerant circulated Defective outdoor PCB Does trouble persist after charging gas Check if there are any places where gas is leaking YES Clogged capillary tube or strainer defective EEV etc e Error of signal transm ission power cable defective indoor D Does error persist after power P Trouble by transient cause not unit trouble reset Correct improper wire connection on indoor outdoor unit Defective outdoor PCB Are the lines connecting the indoor and outdoor units connected normally Is DC 0 Approx 20V detected between 2 3 terminals on outdoor terminal block Is DC 0 Approx 20V detected between 2 3 terminals on indoor terminal block Check crossover wires Is AC 220 230 240V applied between D 2 on the indoor terminal block Defective outdoor PCB Check crossover wires YES Defective indoor PCB Insufficient refregerant amount Faulty power transistor Broken compressor SA C Trouble of outdoor un it S
200. ot be kept in a liquefied state and gasified refrigerant bubbles in the charging cylinder it becomes difficult to read values Therefore it is advisable to adequately use an electronic balance for refrigerant charging An electronic balance for refrigerant charging has higher strength due to its structure with four points of support for refrig erant cylinder weight detection As the charge hose connecting part has two ports one for R22 7 16 UNF 20 threads per inch and the other for R410A 1 2 UNF 20 threads per inch it can also be used for charging the conventional refrigerant Two types of electronic balance for refrigerant charging are available one for 10kg cylinder and the other for 20kg cylinder Electronic balance for 10kg cylinder Electronic balance for 20kg cylinder precision 2g precision 5g Refrigerant is charged manually by opening closing the valve d Torque wrench for nominal diameters 1 2 and 5 8 Along with changes in flare nut sizes for enhanced pressure resisting strength torque wrenches for R410A differ in opposite side size Table 14 Differences between conventional wrenches and those for R410A Conventional torque wrench Torque wrench for R410A For 1 2 opposite side 24mm x 55N m 26mm x 55 x torque 550 kgfcm 550 kgf cm For 5 8 opposite side 27mm x 65N m 29mm 65N m x torque 650 kgfcm 650 kgf cm 2 g h Flare tool clutch ty
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202. ow Humidity sensor Normal system operation is possible Humidity sensor Humidity sensor operation element Failure mode Control input circuit resding Air conditioning system operation Connector F 77 7X 773 D Disconnected wire I E E Disconnected wire Humidity reading is 0 Anti condensation control is not done a 02 Disconnected wire Bl Awaesna UNGELESEN _ _______ _ 5 2 dad BEG Humidity reading is 100 Anti condensation control keep doing Remark Do not perform a continuity check of the humidity sensor with a tester If DC current is applied it Humidity sensor assembly could damage the sensor b Outdoor unit i Phenomenon Sensor Operation __ mode Shortcircuit Disconnected wire Heat exchanger Cooling System can be operated normally Compressor stop sensor Heating Defrosting is not performed Defrosting is performed for 10 minutes at approx 35 minutes Ourdoor air Cooling System can be operated normally Compressor stop temperature sensor Heating Defrosting is not operated Defrosting is performed for 10 minutes at approx 35 minutes Discharge pipe Compressor overload protection is disabled All modes Can be operated Compressor stop 9 Checking the indoor electrical equipment a Is there voltage between terminal blocks 1 and 2 AC 220 230 240 YES y NO Is the fu
203. p 21 CDB 23 CDB 27CDB 31 CDB 33 CDB 14 CWB 16 CWB 19 CWB 22 CWB 24 CWB outdoor air temp indoor air temp 16 CDB 18 CDB 20 CDB 22 CDB TC SHC TC SHC TC SHC TC SHC TC SHC 15 CWB 2 77 2 71 2 65 2 59 5 CWB 6 CWB 10 CWB 15 CWB Hi 20 CWB 9 2 m min 28 3 23 2 65 3 42 2 62 3 66 2 78 3 77 2 77 3 85 2 74 4 04 2 86 4 20 2 78 30 3 14 2 60 3 33 2 58 3 58 2 74 3 70 2 74 3 78 2 71 3 98 2 83 4 13 2 76 32 3 05 2 56 3 24 2 54 3 50 2 71 3 62 2 70 3 70 2 67 3 91 2 80 4 06 2 74 34 2 95 2 51 3 14 2 50 3 41 2 68 3 54 2 67 3 62 2 65 3 84 2 78 4 00 2 72 35 2 91 2 49 3 10 2 47 3 37 2 66 3 50 2 65 3 58 2 63 3 80 2 77 3 96 2 71 36 2 86 2 47 3 05 2 45 3 33 2 64 3 46 2 64 3 54 2 61 3 76 2 75 3 92 2 70 38 2 76 2 42 2 95 2 41 3 24 2 60 3 38 2 60 3 46 2 58 3 69 2 72 3 85 2 67 39 2 71 2 39 2 90 2 39 3 20 2 58 3 33 2 59 3 42 2 56 3 65 2 71 3 81 2 66 Model SRF50ZIX S Cool Mode Heat Mode Air flow Outdoor air temp 21 CDB 23 CDB 26 CDB 27CDB 28 CDB 31 CDB 33 CDB 14 CWB 16 CWB 18 CWB 19 CWB 20 CWB 22 CWB 24 CWB outdoor air temp indoor air temp
204. pH 9205 e 2 Jaye 34 1e 3ueuudius 104 paseya euinjoA 34 95 yua edid ul JO WG uorej ersur ue 104 e si yns jeuonippe ue Ajeuonippe 0 Auessadau jou SI 1I 20 0 f012e4 urew jeuonippy euonippe Jo aui 0 104 uoee aya y oj Buljqeo ay eseejd suonipuoo 2599 JO apis no uonejejsui ue 104 2 si e pue jinpuoo e peurejuoo say ugy OU pesn si jInpuoo onsejd 10 e yey uonduinsse ay uo peseq ejqeo eu e yom gunoo uoee edA edAj q no Aled euns eseejqo ay uesouo eq pinous jueuno WOJ si YAUM Ajoedeo Jayeaiq NIIN 10 JeabyIMS jun JOOPU BY jo suononujsui uononJjsuoo Y Jo 99 0 SHUN 404 5
205. pe A flare tool for R410A is provided with a large clamp bar receiving hole so that the projection of the copper pipe from the clamp bar can be set at 0 0 5 mm in flare processing and also features higher spring strength for increased expansion pipe torque This flare tool can also be used for R22 copper pipe Gauge for projection adjustment used when flare processing is made by using conventional flare tool clutch type A gauge 1 0 mm in thickness which helps in easily setting the projection of the copper pipe from the clamp bar at 1 0 1 5 mm Vacuum pump adapter It is necessary to use an adapter for preventing vacuum pump oil from flowing back to the charge hose The charge hose connecting part has two ports one for conventional refrigerant 7 16 UNF 20 threads per inch and the other for R410A If the vacuum pump oil mineral mixes with R410A a sludge may occur and damage the equipment Refrigerant cylinder A refrigerant cylinder exclusive for R410A comes identified with refrigerant name and is coated with pink paint as desig nated by the ARI U S A Charge port and packing for refrigerant cylinder According to the charge hose s size a charge port with 1 2 UNF 20 threads per inch and corresponding packing required Gas leakage detector Ahigh sensitivity gas leakage detector exclusive for HFC refrigerant is used In the case of R410A the detection sensitivity is about 23g per year General
206. ped by protective stop control 23 C isplays the reason for the stop stop code 3 times previous when the air conditioner was stopped by protective stop control 24 C isplays the reason for the stop stop code 4 times previous when the air conditioner was stopped by protective stop control 25 C Displays the reason for the stop stop code 5 times previous when the air conditioner was stopped by protective stop control 26 C Displays the reason for the stop stop code 6 times previous when the air conditioner was stopped by protective stop control 27 C isplays the reason for the stop stop code 7 times previous when the air conditioner was stopped by protective stop control 28 C isplays the reason for the stop stop code 8 times previous when the air conditioner was stopped by protective stop control 29 C isplays the reason for the stop stop code 9 times previous when the air conditioner was stopped by protective stop control 30 C Displays the reason for the stop stop code 10 times previous when the air conditioner was stopped by protective stop control c Error code stop code table Assignment of error codes and stop codes is done in common for all models Number of flashes when in service mode Stop coad m Error Auto RUN TIMER or Error content Cause Occurrence conditions display recovery light light Error coad 10 s
207. perations in item below performed with the indoor controller These are the contents of error displays and protective stops which occurred in the past in the air conditioner system Error display contents and protective stop data from past anomalous Service data operations of the air conditioner system are saved in the indoor unit controller s non volatile memory memory which is not erased when the power goes off There are two types of data self diagnosis data and stop data described below These are the data which display the reason why a stop occurred when an error display self diagnosis display occurred in an indoor unit Data are recorded for up to 5 previous occurrences Data which are older than the Sth previous occurrence are erased Self diagnosis data In addition data on the temperature of each sensor room temperature indoor heat exchanger outdoor heat exchanger outdoor air temperature discharge pipe remote controller information operation switching fan speed switching are recorded when trouble occurs so more detailed information can be checked These are the data which display the reason by a stop occurred when the air conditioning system performed protective stops etc in the past Even if stop data alone are generated the system restarts automatically After executing the stop mode while the display is normal the system restarts automatically Data for up to 10 previous occasions are stored
208. r command speed is been maintained and the operation has continued for more than 30 seconds at the same speed it returns to the normal cooling operation 4 5 Cooling low outdoor temperature protective control a Operating conditions When the outdoor air temperature TH2 is 22 C or lower continues for 20 seconds while the compressor command speed is other than 0 rps b Detail of operation 1 The lower limit of the compressor command speed is set to 44 30 rps and even if the speed becomes lower than 44 30 rps the speed is kept to 44 30 rps However when the thermo becomes OFF the speed is reduced to 0 rps 2 The upper limit of the compressor command speed is set to 50 60 rps and even if the calculated result becomes higher than that after fuzzy calculation the speed is kept to 50 60 rps Note 1 Valuesin are for outdoor air temperature is 22 C or 25 C ON Upper limit 50 rps Lower limit 44 rps ON f Upper limit 60 rps Lower limit 30 rps e Values of A B C D Outdoor air temp OFF Sh a a aae First time 0 3 2 25 A B C D i 5 the seconds 7 10 25 28 Outdoor air temp C times c Reset conditions When either of the following condition is satisfied 1 The outdoor air temperature TH2 is D C or higher 2 compressor command speed is 0 rps Heating high pressure control a Purpose Prevents anomalous high pressure operation
209. r command speed is less than 30 rps the compressor is stopped immediately Operation starts again after a delay time of 3 minutes 10 Current cut a Purpose Inverter is protected from overcurrent b Detail of operation Output current from the inverter is monitored with a shunt resistor and if the current exceeds the setting value the compressor is stopped immediately Operation starts again after a delay time of 3 minutes 11 Outdoor unit failure This is a function for determining when there is trouble with the outdoor unit during air conditioning The compressor is stopped if any one of the following in item a b is satisfied Once the unit is stopped by this function it is not restarted a When the input current is measured at 1 A or less for 3 continuous minutes or more b Ifthe outdoor unit sends a 0 rps signal to the indoor unit 3 times or more within 20 minutes of the power being turned on 12 Indoor fan motor protection When the air conditioner is operating and the indoor fan motor is turned ON if the indoor fan motor has operated at 300 rpm or under for more than 30 seconds the unit enters first in the stop mode and then stops the entire system 13 Serial signal transmission error protection a Purpose Prevents malfunction resulting from error on the indoor lt gt outdoor signals b Detail of operation If the compressor is operating and a serial signal cannot be received from the indoor control with
210. r connection YES NO Is fan motor resistance value good Disconnect the fan motor connector then investigate YES Replace outdoor fan motor the fan motor and outdoor PCB separately Is the output of the outdoor PCB NO normal YES Defective outdoor PCB Defective compressor defective e Rotor lock outdoor PCB D Is output voltage applied to all 3 phases of power transistor YES Inspect compressor Check compressor wiring visually Check insulation resistance 1 or over ___ If check results are normal compressor is locked Check coil wire resistance Model 20 35 1 703Q or more at 20 C Model 50 60 0 953Q or more at 20 C 8 Phenomenon observed after shortcircuit wire breakage on sensor Indoor unit Operation Phenomenon Sensor TENIS Shortcircuit Disconnected wire Room temperature Cooling Release of continuous compressor operation command Continuous compressor operation command is not released sensor Heating Continuous compressor operation command is not released Release of continuous compressor operation command Coolin Syst b d T Continiuous compressor operation command is not released stem can be operated normally Heat exchanger g P Anti frosting sensor Heating High pressure control mode Compressor stop command Hot keep Indoor fan stop es Cooling Refer to the table below Refer to the table bel
211. r lock Electronic expansion valve is faulty E Q 2 times Overload operation Outdoor PCB is faulty 1 time 61 Connection lines between the Connection lines are faulty When 10 seconds passes after the power is turned on flash indoor and outdoor units are without communications signals from the indoor Indoor or outdoor PCB are faulty faulty outdoor unit being detected correctly 62 Serial transmission error Indoor or outdoor PCB are faulty When 7 minute 35 seconds ae 5 Noise is causing faulty operation communications signal 5 from either the outdoor unit or the indoor unit being detected correctly 8 time OFF 80 Indoor unit s fan motor is Indoor fan motor is faulty When the indoor unit s fan motor is detected to be running flash abnormal Connector connections are poor at 300 SRF 150 rpm or lower speed with the fan motor Indoor PCB is faulty in the ON condition while the air conditioner is running 2 time 82 Indoor heat exchanger sensor Indoor heat exchanger sensor wire is When a temperature of 28 C or lower is sensed flash is abnormal anomalous stop disconnected continuously for 40 minutes during heating operation Connector connections are poor the compressor stops 4 time 84 Anti condens ation control High humidity condition Anti condensation prevention control is operating flash Humidity sensor is faulty 5 time 85 Anti frost control Indoor unit fan speed drops When th
212. r which is designed to operate with R410A 2 Ifarefrigeration gas leakage occurs during installation servicing be sure to ventilate fully If the refrigerant gas comes into contact with fire a poisonous gas may occur 3 When installing or removing an air conditioner do not allow air or moisture to remain in the refrigeration cycle Otherwise pressure in the refrigeration cycle may become abnormally high so that a rupture or personal injury may be caused 4 After completion of installation work check to make sure that there is no refrigeration gas leakage Ifthe refrigerant gas leaks into the room coming into contact with fire in the fan driven heater space heater etc a poisonous gas may occur 5 When an air conditioning system charged with a large volume of refrigerant e g multi type air conditioner is installed in a small room it is necessary to exercise care so that even when refrigerant leaks its concentration does not exceed the marginal level If the refrigerant gas leakage occurs and its concentration exceeds the marginal level an oxygen starvation accident may result 6 Be sure to carry out installation or removal according to the installation manual Improper installation may cause refrigeration trouble water leakage electric shock fire etc 7 Unauthorized modifications to the air conditioner may be dangerous If a breakdown occurs please call a qualified air condi tioner technician or electrician Improper repa
213. rigerant flow into the unit When refrigerant has been charged into the system to some extent refrigerant flow becomes stagnant when that happens start the compressor in cooling cycle until the unit is filled with refrigerant to the specified weight Making sure of the refrigerant amount close the valve 3 Disconnect the charge hose from the unit Cover the valve ports of the refrigerant piping with caps and tighten them securely Check for gas leakage applying a gas leak detector along the piping line Start the air conditioner and make sure of its operating condition high side and low side pressures and temperature dif ference between return air and supply air 4 REFRIGERANT PIPING INSTALLATION SERVICING MANUAL FOR AIR CONDITIONERS USING R410A These materials are extracted from document issued by The Japan Refrigeration and Air Conditioning Industry Association 4 1 Outline 4 1 1 Refrigerant R410A 1 2 Adoption of R410A in air conditioners In 1974 it was pointed out that the ozone layer in the upper stratosphere about 20 40 km above ground might have been damaged by the ozone depleting substances such as CFC chlorofluorocarbon and HCFC hydrochlorofluorocarbon Since that time many countries across the world have endeavored to take countermeasures against the ozone depletion As a refrigerant belonging to the HCFCs the conventional refrigerant R22 used in air conditioners also tends to deplete the ozone la
214. s JWOD y puey SIy YM pue yun au Jo jaued y uo 1 ejpueu y puey siu apis puey ya uues y JOR siy jo paau aye apis puey y Hues uosied y SI opis 19 1 JUO Y P M A se au JO apis puey e 2 jun ay Aew yey os sped uonoejo1d pue sadou 10 5 uoj u uy UN ay 1910 y 0 y ney e 10 pun y yedun uauM e y ays IY 0 a gissod se ISOJI se PUN aui 1 1 pue eouejeq jo eq ueo pun eu Auedoid jou j uonisod 13 u39 S JO 1950 ay uomeJepisuoo OJU aye eDejneu 10 ui pejsiou s PUN e ueuM NOILQV V sadoid jim 15 5 ay Ji 100pui Duo1M v 943 e pun 9jqejoauuoa x29 vOLpH 10 Ajanisnjoxa sjapow aq snw spun JOOpU Iy e eseud pinbij y ur Jepui o Woy aye semje 3ue1961j81 uj e uonepejbap eoueuuojied syjnsaJ uoiuw eBueuo oj uonisoduioo ay asned jj Japul AD e jo
215. s are stored in memory Data older than the Sth previous occasion are erased The temperature setting indicates how many occasions previous to the present setting the error display data are and the operation switching and fan speed switching data show the type of data Remote controller setting fen eae m Contents of output data Operation switching Fan speed switching MED Displays the reason for stopping display in the past error code Cooling HI Displays the room temperature sensor temperature at the time the error code was displayed in the past AUTO Displays the indoor heat exchanger sensor temperature at the time the error code was displayed in the past LO Displays the remote controller information at the time the error code was displayed in the past MED Displays the outdoor air temperature sensor temperature at the time the error code was displayed in the past HI Displays the outdoor heat exchanger sensor temperature at the time the error code was displayed in the past AUTO Displays the discharge pipe sensor temperature at the time the error code was displayed in the past Remote controller setting Indicates the number of occasions previous to the present Temperature setting the error display data are from 21 C 1 time previous previous time 22 C 2 times previous 23 C 3 times previous 24 C 4 times previous 25 C 5 times previous Only for indoor he
216. sconnected ae ES is abnormal C pon within 40 minutes after intial detection of this anomalous Q onnector connections are poor temperature Outdoor PCB is faulty i Or 55 C higher is detected for 5 seconds continuously G times within 20 seconds after compressor ON 9 time 39 Discharge pipe sensor is Disc arge pipe sensor wire is 25 C or lower is detected for 5 seconds continuously 3 times flash abnormal anomalous stop disconnected within 40 minutes after intial detection of this anomalous gt P Connector connections are poor t t 3 times Outdoor PCB is faulty emperaue 4 time 2 time 42 Current cut Compressor lock Compressor start fails 42 times in succession and the flash flash Compressor wiring short circuit reason for the final failure is current cut Compressor output is open phase Outdoor PCB is faulty O Service valve is closed 2 times Electronic expansion valve is faulty Compressor is faulty 7 time 47 Active filter voltage error Defective active filter When the wrong voltage connected for the power supply em flash When the outdoor PCB is faulty 8 time 48 Outdoor unit s fan motor is Outdoor fan motor is faulty When a fan speed of 75 rpm or lower continues for 30 Q flash abnormal Connector connections are poor seconds or longer T Outdoor PCB is faulty 8 times 5 time 1 time 51 Short circuit in the power Outdoor PCB is faulty When it is judged that the power transistor was flash flas
217. se burnt out 3 15 A Is the voltage DC 0 and 20V blocks 2 and 3 oscillating between YES between terminal YES are normal Indoor electrical components b Indoor PCB check procedure Inspect power source for outdoor unit Replace fuse Replace indoor PCB Indoor unit fan motor check procedure This is a diagnostic procedure for determining if the indoor unit s fan motor or the indoor PCB is broken down 1 Indoor PCB output check a Turn off the power b Remove the front panel then disconnect the fan motor lead wire connector c Turn on the power If the unit operates when the ON OFF button is pressed if trouble is detected after the voltages in the following figure are output for approximately 30 seconds it means that the indoor PCB is normal and the fan motor is broken down If the voltages in the following figure are not output at connector pins No D and 5 the indoor PCB has failed and the fan motor is normal CNU 6 r DC several V 4 6 V GND DC 308 336V DC15V Measuring Resistance when point normal Oi yer reu amp G DC several V 4 6V a DC several V 4 6V sk c o m Blue Yellow 2 Fan motor resistance check Measuring point CD 8 Red Black Resistance
218. sensor TH3 Compressor Electronic expansion valve EEV X Capillary tube Cooling cycle Heating cycle Outdoor air temp sensor 2 Muffler Accumlator Heat exchanger Heat exchanger sensor TH1 Capillary tube Strainer 7777 4 Cooling cycle Heating cycle Outdoor air temp sensor TH2 Heat exchanger Heat exchanger sensor TH1 Capillary tube 2 3 Noise level Model SRF25ZIX S ISO T1 JIS C9612 Indoor Unit 2521 5 Noise 38 dB A Level 38 dB A Xx Cooling O Heating 70 lt M rom 70 E N70 60 60 er __ N60 50 50 40 40 standard 2x10 Pa rrr err e T ET 74 72 B H E PX EL a n Pid Li a ol IE E s uw s i AE n 7 ie 7 7 7 7 3 n 7 A n s j j 2 7 30 30 Sound Pressure Level dB NE DE g tiie 20 20 10 10 63 125 250 500 1000 2000 4000 8000 Mid Octave Band frequency Hz Outdoor Unit SRC25ZIX S Noise 47 dB A Level 47 dB A Xe Cooling Heating 70 p 70 70 60 60 veu N
219. speed is other than 0 rps b Detail of operation lower limit compressor command speed is change as shown in the figure below Lower limit 45 rps mE Lower limit 32 rps Normal operation 8 6 4 6 11 13 Outdoor air temp C c Reset conditions When either of the following condition is satisfied 1 The outdoor air temperature TH2 becomes 6 C 11 C 2 The compressor command speed is 0 rps 8 Compressor overheat protection a Purpose It is designed to prevent deterioration of oil burnout of motor coil and other trouble resulting from the compressor overheat b Detail of operation 1 Speeds are controlled with temperature detected by the sensor mounted on the discharge pipe After lapse of 3 min or over 4 rps After lapse of 3 min or over n0 After lapse of 3 min or over 9 Lower limit Example Fuzzy Figures in are for 90 95 100 105 110 115 Discharge pipe temperature Notes 1 When the discharge pipe temperature is in the range of 100 110 C model 50 105 115 C the speed is reduced by 4 rps 2 When the discharge pipe temperature is raised and continues operation for 20 seconds without changing then the speed is reduced again by 4 rps 3 Ifthe discharge pipe temperature is in the range of 90 100 C model 50 95 105 C even when the compressor command speed is maintained
220. stic incurs less composition changes even when evaporation or condensation as a phase change occurs Consequently even when refrigerant leaks from the gas phase somewhere in the piping installation the composition of circulated refrigerant incurs less changes Therefore R410A can be treated in almost a same manner as a mono constituent refrigerant like R22 is treated When actually charging R410A however do so from the liquid phase side by taking into account the phenomenon that when put in a cylinder the composition changes a little between gas and liquid phases c Pressure characteristics As shown in Table 2 since R410A s vapor pressure is about 1 6 times higher than that of R22 at the same temperature perform installation service with special tools and materials which are exclusive for RA10A and can withstand high pressure Table 1 Comparison of thermophysical properties of R410A and Table 2 Comparison of saturated vapor pressure of R22 R410A and R22 MUT R410A R22 Refrigerant R410A R22 Composition R32 R125 R22 Temperature C wt 50 50 100 20 0 30 0 14 Molecular weight 72 6 86 5 0 0 70 0 40 Boiling point C 514 40 8 20 135 0 81 Vapr pressure 25 C MPa 1 56 0 94 40 232 143 Saturated vapor density 25 C kg m 64 0 44 4 60 373 233 Inflammability Nonflammable Nonflammable 65 4 15 2 60 Oznoe depletion potential ODP 0 0 055 5 5 Source List of thermoph
221. tandard 2x10 Pa ISO T1 JIS C9612 Xx Cooling O Heating 63 125 250 500 1000 2000 4000 8000 Mid Octave Band frequency Hz SRC20ZIX S Noise 47 dB A Level 47 dB A Sound Pressure Level dB standard 2x10 X e Cooling O Heating 63 125 250 500 1000 2000 4000 8000 Mid Octave Band frequency Hz 7 Model SRK25ZIX S Condition ISO T1 JIS C9612 Indoor Unit 2521 5 Noise 41 dB A Level 41 dB A Xx Cooling O Heating 70 70 60 ROM 60 S Ceu ho i ee ee 50 gt 50 Y M NEC CDS NICE PSR B A 40 5 e Dna 40 g EUN ss 58 B E 30 30 o nN 20 20 10 10 63 125 250 500 1000 2000 4000 8000 Mid Octave Band frequency Hz Outdoor Unit SRO25ZIX S Noise 47 dB A Level 47 dB A X Cooling O Heating 70 70 60 60 N60 4 CEN CS ie NS ea 3 S 50 4 50 Pu es N50 1 ss ud S 40 40 g amp 9 v B E 30 30 o ua 20 20 10 10 63 125 250 500 1000 2000 4000 8000 Mid Octave Band frequency Hz Model SRK35ZIX S Condition ISO T1 JIS C9612 Indoor Unit SRK35ZIX S Noise 43 dB A Level 42 dB A Xe Cooling O Heating pouce e v Maias pc cT _ E o e 5
222. te controller batteries become weak or if the remote controller is lost or malfunctioning this button may be used to turn the unit on and off 1 Operation Push the button once to place the unit in the automatic mode Push it once more to turn the unit off 2 Details of operation The unit will go into the automatic mode in which it automatically determines from indoor temperature as detected by sensor whether to go into the cooling thermal dry or heating modes Function Indoor temperature Fan speed Flap Louver Timer Switch operation mode setting Cooling About 24 C Thermal dry About 25 C Auto Auto Continuous i Heating About 26 C Unit ON OFF button 1 6 3 Auto restart function 1 Auto restart function records the operational status of the air conditioner immediately prior to be switched off by a power cut and then automatically resumes operations after the power has been restored 2 The following settings will be cancelled Jumper wire J170 1 FLAP LOUVER 16108 16108 1 FLAP LOUVER Timer settings b HIGH POWER operations Corum J lt g Deuston muc 2 raar Poc ya PUC eae aG 2 b A a Nia 2 16182 10158 Notes 1 Auto restart function is set at on when the air conditioner is shipped from the factory Consult with your dealer if this function needs to be switched off 2
223. ter solution which may cause a gas leakage So use any other type of brazing filler at a hot spring resort etc and coat the surface with a paint 2 When performing brazing again at the time of servicing use the same type of brazing filler 3 Flux a b Reasons for the use of flux By removing the oxide film and any foreign matter on the metal surface it assists the flow of brazing filler In the brazing process it prevents the metal surface from being oxidized By reducing the brazing filler s surface tension the brazing filler adheres better to the treated metal Properties required for flux Temperature at which flux is active coincides with the brazing temperature Due to a wide effective temperature range flux is hard to carbonize It is easy to remove slag after brazing The corrosive action to the treated metal and brazing filler is negligible Excels in coating performance and is harmless to the human body As the flux works in a complicated manner as described above it is necessary to choose an adequate type of flux according to the type and shape of treated metal type of brazing filler and brazing method etc Types of flux Incorruptible flux Generally it is a compound of borax and boric acid Effective in cases where the brazing temperature is higher than 800 C Activated flux Most of fluxes generally used for silver brazing fall under this type It features an increased oxide film r
224. tion during brazing to protect brazed joints from cracking and breakage 5 Oxidation preventive In order to improve the brazing efficiency various types of antioxidant are available on the market However the con stituents of these are widely varied and some are anticipated to corrode the piping materials or adversely affect HFC refrigerant lubricating oil etc Exercise care when using an oxidation preventive 4 3 Installation removal and servicing 4 3 1 Tools for R410A In the case of an air conditioner using R410A in order to prevent any other refrigerant from being charged accidentally the service port diameter of the outdoor unit service valve 3 way valve has been changed Also to increase the pressure resisting strength flare processing dimensions and sizes of opposite sides of flare nuts for copper pipes with nominal diameters 1 2 and 5 8 have been changed During installation service therefore prepare tools exclusive for RA10A shown in 1 on page 99 and general tools shown in 2 on page 100 1 Tools exclusive for R410A a Gauge manifold As R410A is characterized by high pressure conventional tools cannot be used Table 11 Differences between conventional high low pressure gauges and those for R410A Conventional gauges Gauges exclusive for R410A High pressure gauge red 0 1 3 5MPa 76 cmHg 35 0 1 5 3MPa 76 cmHg 53 Compound gauge blue 0 1 1 7MPa
225. tion is stopped If a temperature of 45 C or lower is detected for flash zs connection 15 seconds it is judged that the wire is disconnected eee CHE OE Indoor PCB is fault Not displayed during operation y Broken heat exchanger sensor When a heat exchanger sensor 2 wire disconnection is detected while 3 time ON ic c Heatexchanger 2 wire poor connector operation is stopped If a temperature of 28 C or lower is detected for flash sensor 2 error connection 15 seconds it is judged that the wire is disconnected Indoor PCB is faulty Not displayed during operation 6 time Indoorfan Defective fan motor poor When conditions for turning the indoor unit s fan motor on exist during air ON E 16 conditioner operation an indoor unit fan motor speed of 300 SRF 150 rpm flash i or lower is measured for 30 seconds or longer The air conditioner stops Brok td irt 55 C or lower is detected for 5 seconds continuously 3 times within K Outdoor air enn uN 40 minutes after initial detection of this anomalous temperature eeps 1 time 8 time E38 d sensor wire poor connector Or 55 C or higher is di d for 5s ds N 2 ithin 20 flashing flash flash emperature connection or higher is detected for 5 seconds continuously within sensor error Outdoor PCB is faulty seconds after compressor ON The compressor is stopped Brokeii heat exch 55 or lower is detected for 5 seco
226. u thoroughly investigated the details of the trouble which the customer is complaining about b Is the air conditioner running Is it displaying any self diagnosis information c Is a power supply with the correct voltage connected d Are the control lines connecting the indoor and outdoor units wired correctly and connected securely e Is the outdoor unit s service valve open Troubleshooting procedure If the air conditioner does not run at all If the air conditioner does not run at all diagnose the trouble using the following troubleshooting procedure If the air conditioner is running but breaks down proceed to troubleshooting step 4 Important When all the following conditions are met we say that the air conditioner will not run at all a The RUN light does not light up b The flaps do not open c The indoor unit fan motors do not run d The self diagnosis display does not function Troubleshooting procedure If the air conditioner does not run at all If the voltage is correct it will be within the following voltage range 198 264 V Is the correct voltage NO Make sure the correct volt connected for the power age is connected then per supply form an operation check YES With the power off do the flaps open manually NO Is the current fuse on theN YES then close again when indoor unit s board broken
227. ueJ si JO 51001 y 0 y uesut 9 jue d jiu spuiM ue sii yun Joopino 9 esu 10 0g pue pue ay uyoq punoj ajqqom 10 39205 sysodep 1snp se uons saijeuroue ou Jey exeui ajqeo amod ay Hulpasul uj e ue sDurpuno uns y 0 Jeuiojsno au YSL eseg d aul 812A YUM 196300 seb 1ue196181 3onpoud 31X0 e jo pue jo s1ea Jaye abeyearq yea seb asnes nu 1 10 anre yun e esneo Aay apisul sped 291 9 pue ayy ejua fau JI Jeuueu e ui uouaJA e yy m ynu e uay fi e 0 Ajay ews eoejd jun 16150 JOU od e Aunful 40 aunqdnu edid ui ULI uou ire jo JO e se ejo o 1290 osje dn pyinq eanssejd uy wojrno 1 uauj ono ji Aunful anou Aew noA ue funfur 10 1504 uedo sapis se pue y pue edid ay Jossaidwod 3y nof JJ jun JOOP NO jo sui pue ay yano jou 00 40ss81duI02 y
228. uipuno uns ay 4999 0 48ul0 sno 3U Js asea d 10 9JnjIej Pun asneo Ady apisul sued 1 pue zun y 193u8 Y J 0 Ajay ase jews 9Jeuw aoejd e ui yun 100pino au 1815 JOU og 310 Yons Anfu 10 sjusjuoo ay 0j JOU se OS 3129 aye seau Hulbeyoed uj e 109 pjoyasnoy Duiddup 10 Buryes uonuaAeJd uomesuepuoo Duidid 0 190010 0 e YIM Huldid eu 5590 e yun 5 sjrejpueu 10 saouay pue yed 59292 aui sjlespuey pue suappe jueueuued uonisod payeng a ue do 001 e uo paesu s yun ay uauM e Aun ul queyjnsad pue ay ui nsa ueo 92205 92195 juarornsui UY au ui payloads se eoueuejureui pue uoioadsul adeds 90195 e ANIIS e 84 Jo e 109 9 y 0 OND 1019 au 0 aJnsseJd e seu WOO e ue Aep e Joop y uado 104 uej y Aq se Jie se
229. ung ued mous aay e 1 jou os snorsuoo eaeds yeu uerorgns yun auo uey aow e s sixa 110 5 jo Jabuep 3134M e Aisea panowas ued sajejd 3U LU OS SPUN eoeds juaroiins e eseejd Jo HuLDIAJaS Jep1o UJ AILAS 5 SB WAY UI MJ Q JAPIM JO 08 e apis Aq epis palje sul yun euo au 10 1943W e jsnui 31341 ejqejdooo jou sepis JNO ay pun Duipunouns sie e 5 c Kn pui pui jo 34 o Jejnaipuedjed uonisod e ui YUN y JO epis NO ayy s tuos 180 u98J9S xeeqpuiM 2 api oud 10 jo B 0 PUN Y JO epis JANO aui ainssaid jo anp pun y jo dojs snojewoue 496614 ues Jo esneo ued Jo Jo asnes ueo Duong ase saunseaw puim Aq payaye aq ues yun 2 suosJad JO OM uy ue uons pue ay JO
230. us occasion 28 Stop code on eighth previous occasion 29 Stop code on ninth previous occasion 30 Stop code on tenth previous occasion Judgment Examiner Remarks Note 1 In the case of indoor heat exc hanger sensor 2 match from 26 to 30 the temperature setting of remote controller Refor to page 73 7 Inspection procedures corresponding to detail of trouble Sensor error Broken sensor wire connector poor connection SE YES NO Is sensor resistance value good YES Replace PCB Discharge pipe sensor temperature characteristics Sensor temperature characteristics Room temp indoor heat exchanger temp out door heat exchanger temp outdoor air temp Broken wire 180 Broken wire 39 160 25 EN 140 TN LI 120 20 8 8 100 5 5 15 E 80 t 60 g 10 NS 40 20 Short circuit 0 Short circuit Temperature Temperature C Defective fan motor connector poor Indoor fan motor error connection defective indoor PCB 1 Disconnect the fan motor connector then investigate the fan motor and indoor PCB separately Replace indoor fan motor Notes 1 See pages 85 for the fan motor and indoor PCB check pro cedure 2 After making sure the fan motor and indoor PCB are nor mal connect the connectors and confirm that the fan motor is turning If power is turned on while one or the other is broken down it could ca
231. use the other to break down also Current cut Compressor lock Compressor wiring short circuit Compressor output is open Outdoor is faulty Service valve is closed EEV is faulty Compressor faulty In the service valves of the outdoor Open the service valves unit open Secure space for suction Is there any shortcircuit And Blow out Does electronic expansion valve operate normally Defective EEV For inspection of electronic expansion valve see page 89 Defective outdoor PCB P P See pag When the inverter is operated after disconnecting the wires of compressor does the current cut operate within 10 minutes 1 YES Defective outdoor PCB 1 If it is normal it is the rotor lock problem Is output voltage applied to all 3 phases of power transistor Inspect compressor Defective outdoor PCB For the output voltage check of power transistor see page 86 TERI Check compressor wiring visually If check results are normal Check insulation resistance 1 MQ or over compressor is locked Check coil wire resistance Model 20 35 1 7030 or more at 20 C Model 50 60 0 953Q or more at 20 C Overload operation compressor Cu rrent safe stop lock overcharge NO Is the refrigerant amount mormal YES He M NO Is outdoor ventilation condition good YES YES Inspect outdoor air temp sensor Defective outdo
232. yed after one 1 display it is basically normal Abnormality is not found Operating the unit Does unit ON OFF button operates Operating the unit 3577 Control problem main unit Models 58 2021 5 2521 5 3521 5 10 Outdoor unit inspection points nm nmn nm nm nm mu nm m LLL 68 8 uoisuedxe Jo uonoedsu e ME IL ML UL UIS VUL ML ML MIL LEE um 08 eSed uo JOSUAS uores 205 ooutjsisei IY YOOYO pue JOJSOUUOD Josues JO anjeA eouejsisoJ jo uonoedsu Mn dn n un mn o Mu mu um nua ni nn xo1dde pue 0 DC SoyzeIIIOSO F PULION 01 0 AOFc 0 c 0cc XQ oY D 0 0 OV NA OD uonoedsui jeubis jenas pue MIL ML UL HL 1 IHE MIL HL ULE LL MUL MII MHI UNE HI HUE WNT WI IE ene te AN
233. yer Therefore complying with the provisions of the international regulations i e Montreal Protocol concerning the Ozone Depleting Substances and national laws amp Regulations concerned it is necessary to replace R22 with other types of refrigerant which do not deplete the ozone layer A refrigerant composed of hydrogen H fluorine F and carbon C is called an HFC and does not deplete the ozone layer One HFC s is R410A whose pressure is about 1 6 times higher than R22 and whose energy efficiency is almost comparable to that of R22 at the same refrigerant temperature Chemical characteristics of R410A a Chemical stability Like R22 R410A is a chemically stable less toxic and non flammable refrigerant However as in the case of R22 the spe cific gravity of its vapour is larger than that of air and should it leak in an airtight room it may stay at a low level and cause an oxygen starvation accident It may also should it come in direct contact with fire cause a poisonous gas to occur so be sure to handle it only in a well ventilated area b Composition changes Pseudo azeotropic characteristics R410A is a pseudo azeotropic mixed refrigerant composed of two constituents R32 and R125 Quasi azeotropic condition refers to a state in which the dew point curve and boiling point curve gas liquid equilibrium curves pressure constant almost lie on top of each other and a multi constituent refrigerant having this chemical characteri
234. ys 21 eDexeo jnseJ 5 jenueu ay uo peseq Ajejeinooe y e ay eoejd e uons ui Bare 5200 sezeeiq ees Jalgns s eoejd e Yun Siy pue e pue syoous Jayem Jo ou uonejeueb esiou enp ynsa1 sty eunjrej y sarem ouenbeuj uBlu suoyejjesu euorssejoud e 10 jueuidinbe y uoruw ueduioo eui 1euye o jsnque esee d e jueudinbe 10 jeyidsou se uons jueudinbe u eu siy eseejd e jueuidinbe esneo ey y sued onsejd pue pinos dous se yons exij eu pue seouepisei spjoyesnoy se eq pinoys ueis s siy e JAY 0 ULI esau pejpueu si eLayEW
235. ysical properties complied by the Japan Global warming potential GWP 1730 1700 society of refrigeration and air conditioning NIST Source List of thermophysical properties complied by the Japan society of REFPROP V5 10 etc refrigeration and air conditioning NIST REFPROP V5 10 etc 3 Lubricating oils for R410A As the lubricating oils for R22 mineral oils alkylbenze synthetic oils etc have so far been used As R410A features less solubility with these conventional lubricating oils such as mineral oils the lubricating oils tend to stay within the refrigeration cycle As the lubricating oils highly soluble with R410A ester ethereal and other synthetic oils are available However as these syn thetic oils are very hygroscopic they must be treated even more carefully than the conventional lubricating oils Furthermore if these synthetic oils are mixed with mineral oils alkylbenzene synthetic oils etc they may deteriorate and block the capillary tubes or cause the compressor to fail So never mix these synthetic oils 4 1 2 Safety during installation servicing As R410A s pressure is about 1 6 times higher than that of R22 improper installation servicing may cause a serious trouble By using tools and materials exclusive for R410A it is necessary to carry out installation servicing safely while taking the following precautions into consideration 1 Never use refrigerant other than R410A in an air conditione

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