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Service Manual

1. Discharge temperature thermistor RT62 200 100 700 180 Se 600 a G o ae 8l Q 500 Es SS SS 70 9 120 2 8 400 100 S 60 S B gt E 300 a 3 S 50 9 oO MC 60 a 200 k o 46 40 100 Z 2 20 30 0 3 a Ka 50 68 86 104 122 140 158 176 20 32 50 68 86 104 122 140 176 194 122 212 230 48 E Temperature F E S Temperature CF 10 z lt Lo D O 0 p 28 5 ge e 0 4 14 32 50
2. Screws of the cabinet Screw of the motor support Screw of the service panel H Screws of the top panel Conduit plate the back panel Screws of d the back Screws of the cabinet Screw of the valve cover Set screws of the back panel OPERATING PROCEDURE PHOTOS 2 Removing the inverter assembly P C board and power board 1 Remove the top panel cabinet service panel and the back panel Refer to 1 2 Disconnect the following connectors lt Electronic control P C board gt CN931 and CN932 Fan motor CN795 LEV CN661 Discharge temperature thermistor defrost therm istor MUZ and outdoor heat exchanger tem perature thermistor CN663 Ambient temperature thermistor CN681 High pressure switch MUZ lt Noise filter P C board gt CN912 4 way valve MUZ lt Compressor gt lt Reactor gt 4 Remove the screws fixing the relay panel 5 Remove the inverter assembly 6 Disconnect all connectors and lead wires on the electronic control P C board 7 Remove the electronic control P C board from the inverter assembly 8 Remove the screws fixing the power board assembly 9 Disconnect all connectors and lead wires on the power board 10 Remove the power board from the inverter assembly 11 Disconnect all connectors and lead wires on the noise filter P C board 12 Remove the noise filter P C board from the inverter assem bly
3. cal ISO S381M ONTLOINNOO t LINN HOOONI OL STe Ee 831113 3SION IN00u9 JN D EH Tal 7HO9 aseyd 1 A0EZ 802 AlddNS HIMOA MUZ D36NA uz MUZ D36NA MUZ D30NA vz MUZ D30NA 13014 eurui CO 9 DJIDUI Morag S OquAS BUTJIM Plats J04 A UO SI0JINPUOI 19000 asf BUTITAJIS 101 WEIBEIP GUIJSTA 1J 9 9 JTUN JOOPUT BY 0 13431 GUTITA 111 9 39 BPS JO0pUI ayy 1000 T SILON 1109 OI0N310S JAIWA INISUJAJ8 F IZ YOISIWYIHL dW31 JONVHOSTG 2914 31M00W H3MOd INJDITISINI Wal AV Tau f5X HOLSIWHSHL 1504430 T914 HOLIMS 38NSSIYA H IH SdH YyINYOISNVEL INIHOLIMS 1081 HOISIS3H P lt ISH 310008 HIMOd INIDITIILNT DEER 19018 IWNIWHSL 2 TEL y31108INOY YOLOV Y3MOA dd AOGZIVGT ED ISNI 1083 AV139 1109 010N3105 19855 YOLSIYVA SUN A0Se Ive 91 4SN4 993593 yOISIS3U 8 VEU Y31114 SION IN A0S3 Wel ISNI 794 HOLSIS34 S9 V90Ld HOLOW NV4 3H yOLIIVAVI KO HOISINH3HI dal BIONVHOX 1V3H BOOOINO 8913 YyOSSIYAWOI OW H3WHOJSNVHI IN3G8NI 1919 HOLSIWHSHL dWAL INJIGWV 5918 JAIWA NOISNVdX3 MJ H3WHOJSNVHI IN3G8NI TI HOLSIWHSHL dW VIII v918 BIER 7 YyOLIIVAVI ONIHLOOWS 189 JWYN TOGWAS JWYN TOGWAS JWYN TOGWAS peal 8918 918 e S914 SdH Lo MAN e UE 9 d i Ape 2190 SU ONILOINNOD L LINA MOO OOOO Sal H ES II
4. o Ei Suction pressure S 58Hz o 60 50 14 20 25 30 35 40 45 50 55 60 65 70 F PSIG 150 Outdoor ambient temperature 75 140 65 130 120 o A 100 o o Suction pressure oo le KY 58Hz 70 60 50 14 20 25 30 35 40 45 50 55 60 6570 F 16 Outdoor ambient temperature STANDARD OPERATION DATA MSZ D30NA MSZ D36NA MSY D30NA MSY D36NA Cooling Heating Cooling Heating Cooling Cooling Capacity 30 700 32 600 32 000 33 200 35 200 30 700 33 200 34 000 SHF 0 64 0 62 0 64 0 62 Input 3 85 3 36 4 14 4 36 3 84 3 38 4 21 4 24 Rated frequency 84 84 91 91 79 92 Electrical circuit Indoor unit MSZ D30NA MSZ D36NA MSY D30NA MSY D36NA Power supply 208 230 1 60 Input 0 058 Fan motor current 0 45 0 42 Outdoor unit MUZ D30NA MUZ D36NA MUY D30NA MUY D36NA Power supply 208 230 1 60 Input 3 792 3 302 4 082 4 302 3 782 3 322 4 152 4 182 Comp current 17 25 15 56 14 95 13 46 18 65 17 86 17 25 15 56 15 05 13 56 18 95 17 26 Fan motor current 0 80 0 72 Refrigerant circuit Condensing press
5. Removing R V coil MUZ 1 Remove the top panel cabinet service panel and the back panel Refer to 1 2 Disconnect the following connectors lt Noise filter P C board gt CN912 4 way valve 3 Remove the R V coil Photo 9 Screws of the reactor Discharge temperature thermistor Screws of the relay panel Photo 6 Screws of the relay panel Propeller OPERATING PROCEDURE PHOTOS 4 Removing the defrost thermistor MUZ discharge Photo 7 temperature thermistor outdoor heat exchanger Outdoor heat temperature thermistor and ambient temperature exchanger thermistor temperature 1 Remove the top panel cabinet service panel and the back thermistor panel Refer to 1 2 Disconnect the following connectors lt Electronic control P C board gt CN661 Discharge temperature thermistor defrost therm istor MUZ and outdoor heat exchanger tem EN emperature perature thermistor thermistor CN663 Ambient temperature thermistor 3 Pull out the defrost thermistor from its holder MUZ 4 Pull out the discharge temperature thermistor from its hold er Photo 4 5 Pull out the outdoor heat exchanger temperature thermistor from its holder 6 Pull out the ambient temperature thermistor from its holder Defrost thermistor for MUZ Removing outdoor fan motor 1 Remove the top panel cabinet service panel and the back panel Refer to 1 Photo 8 2 Disconnect the following
6. No Replace the noise filter P C board Yes Replace the outdoor electronic control P C board 32 D Check of outdoor fan motor Check the connection between the connector CN931 and CN932 Is the resistance between each ter minal of outdoor fan motor normal Refer to 10 4 ZS No Y Disconnect CN932 from outdoor electronic control P C board and turn on the power supply Y Rotate the outdoor fan motor manually and measure the voltage of CN931 Between 1 and 5 Between 2 and 5 Between 3 and 5 Y Fixed to either 5 or 0 VDC Does the voltage between each terminal become 5 VDC No and 0 VDC repeatedly Yes Y lt No Does the outdoor fan motor rotate smoothly Y Yes Replace the outdoor DC fan motor E Check of power supply Check the connecting of parts of main power supply circuit Y Turn ON power supply Y Is there voltage of 208 230 VAC in the power supply terminal block Yes Y Is the output voltage from the noise filter P C board 208 230 VAC Yes Y Is the input voltage to the power board 208 230 VAC Yes Y Is the input voltage to the outdoor electronic control P C board 294 325 VDC Yes Replace the outdoor electronic control P C board No No No
7. No Replace the outdoor electronic control P C board Check the power supply cable Replace the noise filter P C board Replace the reactor Replace the power board 33 F Check of compressor start failure Confirm that 1 4 is normal Electrical circuit check 1 Contact of lead wire leading to compressor 2 Output voltage of the outdoor electronic control P C board and balance of them See 10 5 0 3 Direct current voltage to the outdoor electronic control P C board 4 Voltage between outdoor terminal block S1 S2 Does the compressor run for 10 seconds or Check the refrigerant circuit more after H starts Yes Check the stop valve we After the compressor is heated with a drier does the compressor start 1 No Yes Compressor start failure Activate pre heat control Refer to 9 1 PRE HEAT CONTROL G Check of LEV Turn ON power supply to the outdoor unit after checkin LEV coil is mounted to the LEV body securely Y Is click click sound heard Or do you feel vibration of the LEV coil with a hand Yes No Y Disconnect the connector CN795 Is there normal resistance to LEV coil No Replace the LEV coil 34 Replace the compressor E Heating part x1 Heat the compressor with a drier for about 20 minutes Do not recover refrigerant gas wh
8. o Press EMERGENCY OPERATION switch to COOL or HEAT mode COOL Press once HEAT Press twice Test run operation starts and continues to operate for 30 minutes Compressor operates at rated frequency in COOL mode or 58 Hz in HEAT mode Indoor fan operates at High speed After 30 minutes test run operation finishes and EMERGENCY OPERATION starts Operation frequency of compressor varies To cancel test run operation EMERGENCY OPERATION press EMERGENCY OPERATION switch or any button on remote controller 19 8 ACTUATOR CONTROL MUZ D30NA MUZ D36NA MUY D30NA MUY D36NA 8 1 OUTDOOR FAN MOTOR CONTROL The fan motor turns ON OFF interlocking with the compressor ON The fan motor turns ON 5 seconds before the compressor starts up OFF The fan motor turns OFF 15 seconds after the compressor has stopped running 5 seconds 15 seconds ON lt E Compressor i i OFF ON dn OFF 8 2 R V COIL CONTROL lt MUZ gt Heating AA Su q A T ON Cooling io ey es OFF Dry Se tate tees OFF NOTE The 4 way valve reverses for 5 seconds right before start up of the compressor lt COOL gt lt HEAT gt 5 seconds 5 seconds ON d ON or orl ON or OFF F i i Outdoor fan ON Ee SSES OFF motor R V coil 8 3 Relation between main sensor and actuator Actuator Outdoor fan motor Sensor Purpose Indoor Compressor fan motor Protection Cooling Coil frost prevention
9. R V coil 208 230 VAC 60 Hz Output 208 230 VAC 60 Hz Output CN901 To electronic CN902 CN903 control P C Topower To power GALO Input ves dF o board board board TT TD Orn OREA Te ern d ac o e od vi of o_o_o oo E zoo l D902 _0000 oo o HO o d PIO Lee DE seen EOD ces EE E u D915 Ki PO o o o OLO 9 H o o Si H al alo Q AB E N Sg o o oo 28 NaS22 I 5 DIP o o PE oo oo T2AL250V J o l l PTOS F64 FUSE T2AL250V 39 Ez x64 NR64 VARISTOR 208 230 VAC 60 Hz DMOON201 Jones 3 Outdoor power board MUZ D30NA MUZ D36NA MUY D30NA MUY D36NA 294 370 VDC g Output Red 00 00 00 OO mm am O A 00000000 40 Connect to the compressor Voltage among phases 180 V Connect to the ground CN2 Connect to the controller board 1 5 Signal transmission To electronic control P C board 5 VDC pulse wave 2 5 Zero cross signal 3 4 Not used 6 5 15 V 7 5 15 V CN3
10. y Is there voltage of 208 230 VAC between pin1 gt 1 Turn off power supply of indoor and outdoor unit and discon and pin 2 at connector CN912 X No nect the connector CN781 in the outdoor electronic control P C Yes board Y 2 3 minutes after turning ON the power supply start EMER Turn OFF power supply of indoor and outdoor unit GENCY OPERATION in HEAT mode Y y ec the Se Is there voltage 12 VDC be Replace the electronic or In noise filter i tween the connector CN781 Si P C board Is there normal Replace the R V coil No control P C board h Keis resistance to R V coil BS CO ee Yes Replace the noise filter P C board Yes Replace the 4 way valve e Cooling operation does not work 1 Disconnect the lead wire leading to the compressor X If the connector CN912 is not 2 3 minutes after turning on the power supply start EMERGENCY connected or R V coil is open OPERATION in COOL mode voltage occurs between terminals even when the control is OFF Is there voltage of 208 230 VAC between pin1 Replace the dewav valve and pin 2 at connector CN912 X No P y 1 Turn OFF power supply of indoor and outdoor unit and disconnect the connector CN781 in the outdoor electronic control P C board 2 3 minutes after turning ON the power supply start EMER GENCY OPERATION in COOL mode Is there voltage 12 VDC between the connector CN781 pin 5 and pin 3
11. 6 times Serial signal The communication fails between the indoor and outdoor unit for 3 minutes Refer to 10 5 How to check miswiring and serial signal error Lightning 7 times Nonvolatile memory data The nonvolatile memory data cannot be read properly Replace the outdoor electronic control P C board Lightning 8 times Current sensor Current sensor protection stop is continuously performed twice Replace the power board Lightning 11 times Communication error between P C boards The communication protection stop between boards is con tinuously performed twice Check the connecting wire between outdoor elec ronic control P C board and power board Lightning 12 times Zero cross detecting circuit The protection stop of the zero cross detecting circuit is continuously performed 10 times Check the connecting wire among outdoor elec ronic control P C board noise filter P C board and power board Outdoor unit stops and restarts 3 minutes later is repeated NOTE 1 The location of LED is illustrated at the right figure Refer to 10 6 1 IPM protection Overcurrent is detected after 30 seconds of compressor start up Lock protection Overcurrent is detected within 30 seconds of compressor start up Reconnect compressor connector Refer to 10 5 How to check inverter compres sor Refer to 10 5 Check of compressor start fai eChe
12. Even when the inverter P C board or the outdoor electronic control P C LED2 LED1 board is normal LED blinks 6 times after 3 minutes e r Does the LED on the inverter P C board or 7 E A the outdoor electronic control P C board Replace the inverter P C board or Lighted Blinking repeat 3 6 second OFF and 0 8 second No the outdoor electronic control P C board ON quick blinking 3X3 Lighted L amp 2 Yes or not X2 Be careful of the residual voltage lighted of smoothing capacitor Turn OFF the power supply Remove the short circuit between Is there any error of the in outdoor terminal block S2 and S3 door outdoor connecting wire Replace the indoor A Turn ON the power supply No such as the damage of the wire outdoor connecting Turn OFF inverter controlled lighting Is there amplitude of 10 to 20 VDC intermediate connection poor wire equipment between outdoor terminal block S2 and contact to the terminal block Turn OFF the power supply and then 3 lt Confirmation of serial signal gt No turn ON again Yes e Press EMERGENCY OPERATION switch Y Is there any error of the in z Is there rated voltage between door outdoor connecting wire Replace the indoor e Reinstall indoor terminal block S1 and S2 No such as the damage of the wire outdoor connecting either the unit lt Confirmation of power voltage gt 9 N intermediate connection poor wire or the light Yes contact to the terminal block away from No Is serial signa
13. Fin temperature thermistor RT64 Signal reception From electronic control P C board 5 VDC pulse wave CNS Primary current detection Connect to the noise filter 11 DISASSEMBLY INSTRUCTIONS lt Terminal with locking mechanism Detaching points gt The terminal which has the locking mechanism can be detached as shown below There are two types refer to 1 and 2 of the terminal with locking mechanism The terminal without locking mechanism can be detached by pulling it out Check the shape of the terminal before detaching 1 Slide the sleeve and check if there is a locking lever or not 2 The terminal with this connector has the locking mechanism Slide the sleeve Hold the sleeve and Pull the terminal while pull out the terminal pushing the locking slowly lever Connector MUZ D30NA MUZ D36NA MUY D30NA MUY D36NA NOTE Turn OFF power supply before disassembly OPERATING PROCEDURE 1 Removing the cabinet 1 Remove the screws of the service panel Photo 1 2 Remove the screws of the top panel 3 Remove the screw of the valve cover 4 Remove the service panel 5 Remove the top panel the top 6 Remove the valve cover panel 7 Remove the screws of the cabinet 4 e e Screw of 8 Remove the cabinet r 9 Remove the screws of the back panel Screws gt A Z 10 Remove the back panel ofthe 4 SG u K cabinet Z
14. after the fan gets started Refer to 10 5 0 Check of outdoor fan motor 9 time flash Nonvolatile memory data 5 times Nonvolatile memory data cannot be read properly Replace the outdoor electronic control P C board 10 time flash Discharge temperature Lighting The frequency of the compressor is kept 80 Hz or more and the discharge temperature is kept under 102 F 39 C for more than 20 minutes e Check refrigerant circuit and refrigerant amount Refer to 10 5 Check of LEV Communication error between P C boards Communication error occurs between the electronic control P C board and power board for more than 10 seconds The communication between boards protection stop is continuously performed twice Check the connecting wire between outdoor electronic control P C board and power board 41 time flash Current sensor A short or open circuit is detected in the current sensor during compressor operating Current sensor protection stop is continuously performed twice Replace the power board Zero cross detecting circuit 5 times Goes out Zero cross signal cannot be detected while the compres sor is operating The protection stop of the zero cross detecting circuit is continuously performed 10 times Check the connecting wire among electronic control P C board noise filter P C board and power board NOTE Blinking pat
15. 2031 VIE A OHNO un Z Z TBN DINOULOI13 99 109 aseyd I 1082 802 IM ONTLOINNOD INN BO0ONI OL 2409 aseyd A064 804 AIddp Y3M0d 10 6 REFRIGERANT SYSTEM DIAGRAM MUZ D30NA MUZ D36NA Unit inch Oil Strainer Capillary tube separator 100 9D 0 071 x1 D 0 024 X Refrigerant pipe 5 8 with heat insulator Flared connection 9 3 8 61 8 x 0 6 x 1 000 Stop valve Service with service p gt port Defrost e Da Seel EE thermistor RT65 Discharge temperature thermistor q Compressor Outdoor heat exchanger temperature thermistor Flared connection Strainer LEV Strainer N Receiver 100 100 R V coil heating ON mn Capillary tube cooling OFF Se 00 942 1D 01084 sopes pow n zons 43 6 x 42 4 x 50 Refrigerant flow in heating MUY D30NA MUY D36NA Unit inch Oil separator Capillary tube oD e x I D 0 024 E E Refrigerant pipe 45 8 x 39 with heat insulator 1 8 x 0 6 x 1 000 temperature Service gt port High pressure Switch Stop valve with service port 3 Flared connection Outdoor heat E exchanger i H temperature Ge d thermistor thermistor Compressor Flared connection LEV Strainer 100 EE Stop valve Capillary tube Refrigerant pipe 63 8 OD 9 142 EE with heat insulat
16. 800 33 200 33 200 34 600 9 800 33 200 9 800 34 600 Heating 47 31 32 600 8 700 34 000 35 200 8 700 36 000 Heating 17 3 amp 2 Btu h 20 800 22 800 Power consumption Rated Minimum Maximum TOTAL Cooling 1 W 3 850 620 3 850 3 380 620 3 380 4 140 4 360 620 4 140 620 4 360 4 210 4 240 620 4 210 620 4 240 Heating 47 1 3 360 520 3 600 3 840 520 4 100 Power consumption Heating 17 2 2 620 3 000 EER 1 SEER 3 amp 3 Cooling 8 0 14 5 9 1 16 0 7 7 7 6 14 5 7 9 8 2 15 1 HSPF IV V 3 4 Heating 8 2 6 7 8 2 6 7 COP Heating 1 2 84 2 69 Outdoor unit model MUZ D30NA MUY D30NA MUZ D36NA MUY D36NA Power supply V phase Hz 208 230 1 60 Max fuse size time delay 25 Min circuit ampacity 21 Fan motor 0 93 Compressor TNB220FMCHT 16 20 Refrigeration oil 870 NEO22 Refrigerant control Linear expansion valve Sound level 31 Cooling 55 55 56 Heating 57 57 Defrost method Reverse cycle Reverse cycle Dimensions W 33 1 16 D 13 H 33 7 16 Weight 126 141 External finish Munsell 3Y 7 8 1 1 Remote controller Wireless type Control voltage by b
17. g 8 380 s 340 110 70 Oo 300 100 260 n 90 6870 75 80 85 90 95 100 105 F 6870 75 80 85 90 95 100 105 F Outdoor ambient temperature Outdoor ambient temperature 15 MUY D36NA PSIG 580 540 PSIG 2 500 T YN g EA y 460 140 g 420 d 130 o 2 g 8 380 2120 Re 340 8 110 Oo 200 100 260 90 68 70 75 80 85 90 95 100 105 F 68 70 Outdoor ambient temperature Heating Data is based on the condition of outdoor humidity 75 Air flow should be set to High speed Data is for heating operation without any frost MUZ D30NA PSIG 500 480 460 440 420 400 380 360 340 320 300 280 260 240 220 200 Condensing pressure 14 20 25 30 35 40 45 50 55 60 6570 F Outdoor ambient temperature MUZ D36NA PSIG 500 480 460 440 420 400 380 360 340 320 300 280 260 240 220 200 Condensing pressure 14 20 25 30 35 40 45 50 55 60 6570 F Outdoor ambient temperature PSIG 150 indoor DB te mperature CE 86 EE EE 70 75 80 85 95 100 105 F Outdoor ambient temperature 140 75 130 YE
18. outdoor electronic control P C board Refer to 10 5 0 Check of bus bar voltage 13 times Goes ou Outdoor fan motor Failure occurs continuously three times within 30 seconds after the fan gets started Refer to 10 5 0 Check of outdoor fan motor Lighting 8 times Current sensor protection Ashort or open circuit is detected in the current sensor during compressor operating Replace the power board Lighting 11 times Communication between PC boards protection Communication error occurs between the outdoor electronic control P C board and power board for more than 10 sec onds e Check the connecting wire between outdoor elec tronic control P C board and power board Lighting Zero cross detecting circuit protection 2 LED is lighted during normal operation Zero cross signal cannot be detected while the compressor is operating The flashing frequency shows the number of times the LED blinks after every 2 5 second OFF Example When the flashing frequency is 2 0 5 second ON 2 5 second OFF 27 0 5 second ON Check the connecting wire among outdoor elec tronic control P C board noise filter P C board and power board Outdoor electronic control P C board Parts side LED2 LED1 v V Lighting gt Symptom ion LED2 Yellow Abnormal point Condition Condition Remedy Outdoor un
19. stops but the indoor outdoor communication still runs on In this situation check for the electromagnetic noise 37 10 6 TEST POINT DIAGRAM AND VOLTAGE 1 Outdoor electronic control P C board MUZ D30NA MUZ D36NA MUY D30NA MUY D36NA Defrost thermistor RT61 Ambient temperature thermistor RT65 Fin temperature thermistor RT64 Outdoor heat exchanger temperature thermistor RT68
20. 0 5 Input correction factors HI Capacity correction factors 0 50 100 150 Hz The operational frequency of compressor MUY D36NA Correction of Cooling capacity 1 5 1 0 0 5 Capacity correction factors o o Input correction factors o a le 150 Hz a o HI a 1 5 1 0 0 5 1 5 1 0 0 5 Correction of Cooling total input 0 50 100 Correction of Cooling total input 0 50 100 Correction of Cooling total input 0 50 100 150 Capacity correction factors 150 Hz The operational frequency of compressor The operational frequency of compressor Capacity correction factors 150 Hz The operational frequency of compressor The operational frequency of compressor The operational frequency of compressor 1 5 1 0 0 5 Correction of Cooling total input 100 150 0 50 The operational frequency of compressor The operational frequency of compressor 18 o a o a a Correction of Heating capacity 0 50 100 Correction of Heating capacity 0 50 100 150 Hz 150 Hz Correction of Heating total input 5 o Input correction factors o a 0 50 100 150 Hz The operational frequency of compressor Correction of Heating total input 15 o Input correction factors o a 0 50 100 150 Hz The operational frequency of compressor 7 6 TEST RUN OPERATION How to operate fixed frequency operation OO OO N
21. 190 2 SINIM INTLIINNOJ 277 LINN YOON el oo o off 2 o off 2 o Sit col my SBLNO EUR Can 997 038 _ 1031 2037 9 AR auyoa 9 d Sie HIN TBLNO 1081N09 IS ail L E J JB THO9 aseud ei le 201 AVAN gt SIMIM INTLJINNOJ LINA Y000NI OL 2409 aseyd T AQEC 7800 Addi UIMOd MUY D36NA MUY D30NA 3301q eurui CTI a RITPUT Morag SIOQU S P BUTJIM Plats JOJ 100 SIOJINPUOI J3000 ash 2 GUTITAJOS 104 WRIGETP BUTJIM 1333918 1100 JOOPUT 34 0 18191 GUTITA 11 29 3 9818 JOOPUT ay InOqY T SILON YOISINY3HI dWIL NIS t918 JINGOW BIMOd 1N3911141NI WdI HOLSTWHSHL dW3l 398VHOSTO 914 HOLIMS 38N5538d HOIH SdH Y0l1SIS38 EA JINGOW YSMOd 1N3911131NI 0 69H YAWYOSSNVUL ONTHOLIMS Y3 11041N09 HOLOVS Y3M0d Jidd AOS 1VSI EL JSN TOBY 19018 TVNINW331 HOLSTEVAL SUN A0S2 Ive 91 ISNA 993593 19019 IWNIWYSL BILT ISTON 4N 0521421 3503 933 yOLSIS38 BOLON WWII JN BOLIOVAYI AQ HOLSIS3Y HOSSIudWO0 JW WINNOISNVEL IN38UNO 1919 HOISINH3HI ONIL HJONVHOX3 1Y3H YOOOLNO JAIWA NOISNWdX3 MT HINBOJSNVEL INJMMNO Z TI BOLSINGIHL ANIL INJIGWV wolovau 1 HOLIOVdVJ ONIHLOOWS 182 KEG IWWN TO8WAS A1 8918 918 EI SdH Eug Ee WOI M4 190 UNI 9NILIINNO LINN YOOONT Woud T99NO Can TBSNO El 1031
22. 2 3 Make sure to check at least two consecutive blinking cycles 2 The outdoor unit is normal Releasing the failure mode recall function Release the failure mode recall function by the following procedures 7 Turn OFF the power supply and turn it ON again Release the failure mode recall function accord Press RESET button of the remote controller ing to the left mentioned procedure Y Repair the defective parts Deleting the memorized abnormal condition After repairing the unit recall the failure mode again according to Setting up the failure mode recall function 10 2 1 Press OPERATE STOP ON OFF button of the remote controller the set temperature is displayed with the remote controller headed towards the indoor unit Press EMERGENCY OPERATION switch so that the memorized abnormal condition is deleted Release the failure mode recall function according to Releasing the failure mode recall function mentioned above NOTE 1 Make sure to release the failure mode recall function once it is set up otherwise the unit cannot operate properly 2 If the abnormal condition is not deleted from the memory the last abnormal condition is kept memorized 2 Blinking pattern when outdoor unit is abnormal S i Blinking at 0 5 Blinking at 0 5 2 5 second OFF 3 second ON second interval 2 5 second OFF 3 second ON second interval Dd gt gt gt gt lt __
23. 2 3 3 68 20 3 71 18 5 4 25 17 4 4 58 16 2 MUZ D36NA 67 22 2 4 03 20 6 4 36 19 1 63 25 3 3 86 23 5 4 16 21 4 71 17 8 3 30 16 7 3 55 15 6 MUY D30NA 67 21 2 3 13 19 6 3 38 18 3 63 24 0 2 99 22 3 3 23 20 3 71 18 5 4 10 17 4 4 42 16 2 67 22 2 3 89 20 6 4 21 19 1 63 25 3 3 73 23 5 4 02 21 4 71 19 3 4 13 18 1 4 45 16 8 67 23 2 3 92 21 5 4 24 20 0 63 26 3 3 75 24 5 4 05 22 3 NOTE 1 IWB Intake air wet bulb temperature TC Total Capacity x10 Btu h SHC Sensible Heat Capacity x10 Btu h TPC Total Power Consumption kW 2 SHC is based on 80 F of indoor Intake air DB temperature 2 COOLING CAPACITY CORRECTIONS Refrigerant piping length one way ft 25 std 40 65 IWB F MUY D36NA 208 V MUY D36NA 230 V MUZ D30NA MUZ D36NA MUY D30NA MUY D36NA 3 HEATING CAPACITY Indoor air Outdoor intake air WB temperature F 25 35 43 45 IDE UE TC TPC TC TPC TC TPC TC 75 2 94 3 28 3 44 MUZ D30NA 70 2 87 3 19 3 36 65 2 77 3 11 3 28 75 3 36 3 74 3 94 MUZ D36NA 70 3 28 3 65 3 84 65 3 17 3 55 3 74 NOTE 1 IDB Intake air dry bulb temperature TC Total Capacity x10 Btu h TPC Total Power Consumption kW 2 Above data is for heating operation without any frost 1 0 0 878
24. 68 86 104 cog E NA o Ce D SZ o 3 ke Temperature F GO GO Doe OSS z gt Ki 5 x S222 265 Bro o S 2 58 8 58g 823 Sr g 2 oe ge 2 24 332 pl amp ge fgs HEEE Eyias e Es 885 lt 20 cs 2555508 50 SE gt E gt 0 a gt z zo se SE E DD 55 gt Sel Z2n35 ao Bess 82 e Z O o gt O o S S 4a Ora 29 0 ENSS SE ZE Om 38 a Q gt D os 2 30 E o Q gt gt Oe Ge ER ON gt z EDO Of lt S GA 2 5 gt R gt 22 55 ZEE L 220 an nn et Ze Ole Bett AT TA 2 LE le z I TER oS o 90 e El 000 O sel Set Won Jg AO ee 233 Ca Al Li resea AT 000 do de cese o 2 1 m R cees o dE LED 1 Je E No Allo Roses Rea7 LED 2 sO Resse ce 5 5 TE os ec o CJess2 CS KS H e Fa o Coes o LS tt ce e T o o e Zen oi Desa ose oi Clesse i ES 2 oi Clesse a 8 Ro 2 28 2 ei ene Pai cas2 a E gt cesar Jo g Reeia o _ o z ws CN801 i d Ze 294 370 d 1 Ee VDC SS Cones ze Input o Levi eee o casas c8s3c e F801 2 S T FUSE ae T3 15AL250V gas em i Reo CN601 CI ov 208 230 VAC mas 60 Hz for indoor a8 KS Input 5 10 VDC Daez S so1 Gees ooo Ex Bea 180i D8020 zoe cnt Usezaneze negenen KE gt CN681 H H ST High pressure switch LL ES WLLL ISS PEP oooooo o o OO ans 00 c 00 am O 38 2 Noise filter P C board MUZ D30NA MUZ D36NA MUY D30NA MUY D36NA MUZ CN912
25. Discharge temperature thermistor Indoor coil temperature thermistor Heating High pressure protection Defrost thermistor Defrosting Fin temperature thermistor Protection Outdoor heat exchanger temperature Protection Ambient temperature thermistor O O O O O O O O O O O Cooling Low ambient temperature operation 20 9 SERVICE FUNCTIONS MUZ D30NA MUZ D36NA MUY D30NA MUY D36NA 9 1 PRE HEAT CONTROL If moisture gets into the refrigerant cycle or when refrigerant is liquefied and col lected in the compressor it may interfere the start up of the compressor To improve start up condition the compressor is energized even while it is not KIT operating E ge D This is to generate heat at the winding eo E The compressor uses about 50 W when pre heat control is turned ON p af D Pre heat control is OFF at initial setting 9 D TO mah How to activate pre heat control ne EA 1 Turn OFF the power supply for the air conditioner before making the setting L s nma 2 Set the 2nd Dip Switch of SW1 on the outdoor electronic control P C board to les EI o ON to activate pre heat control function 9 2 CHANGE IN DEFROST SETTING Changing defrost finish temperature 1 Turn OFF the power supply for the air conditioner before makin
26. How to operate with fixed operational frequency of the compressor 1 Press the EMERGENCY OPERATION switch on the front of the indoor unit and select either EMERGENCY COOL mode or EMERGENCY HEAT mode before starting to operate the air conditioner The compressor starts with operational frequency The fan speed of the indoor unit is High This operation continues for 30 minutes In order to release this operation press the EMERGENCY OPERATION switch twice or once or press any button on the remote controller OO O N 13 7 2 PERFORMANCE CURVE Cooling MUZ D30NA MUZ D36NA MUY D30NA at rating condition 0 at rating condition 0 at rating condition 0 SHF ji iti 0 64 SHF di 0 62 SHF i diti 0 64 Airflow 763 CFM Airflow 763 CFM Airflow 763 CFM 40 43 40 38 41 38 SS 2 T 8E E lt KT oS A EE h EE h 32 door ae 35 Ndog ax 32 Dote i ga or m or m or 5 int 5 int 5 int Sa 30 ake A S 33 Die A i Sa 30 ake A BS 2 t WB 71 TE 3 t wg 71 BS 28 h EA 71 5X tem 3 x
27. MITSUBISHI ELECTRIC SPLIT TYPE AIR CONDITIONERS OUTDOOR UNIT SERVICE MANUAL Models Changes for the Better Revision C e Errors in TROUBLESHOOTING have been corrected Please void OBH502 REVISED EDITION B No OBH502 REVISED EDITION C utilized R410A MUZ D30NA S MUZ D36NA MUY D30NA MUY D36NA Indoor unit service manual MSZ D NA Series OBH501 MSY D NA Series OBH501 in Se Ss Ss SS gt lt lt lt S Se S55 SS SS SZ SS Se SS Ss Ss Ss gt FE SAS lt CONTENTS 1 TECHNICAL CHANGES a 3 2 PART NAMES AND FUNCTIONS 3 3 SPECIFICATION SPER CLERC POOLE REECE EEC L REENEN RER E ER ERR 4 4 OUTLINES AND DIMENSIONS 6 5 WIRING DIAGRAM a 7 6 REFRIGERANT SYSTEM DIAGRAM 11 72 DAA I 13 8 ACTUATOR CONTROL e 20 9 SERVICE FUNCTIONS 21 10 TROUBLESHOOTING eneen eenen nen 22 11 DISASSEMBLY INSTRUCTIONS 41 PARTS CATALOG OBB502 NOTE RoHS compliant products have lt G gt mark on the spec name plate Mir SLIM Use the specified refrigerant only Never use any refrigerant other than th
28. MUZ Measure the resistance using a tester Temperature 14 104 F 10 40 C Normal 1 20 1 55 KQ Linear expansion valve Measure the resistance using a tester Temperature 14 104 F 10 40 C Color of lead wire WHT RED RED ORN YLW BRN BRN BLU 29 YLW BRN BLU 10 5 TROUBLESHOOTING FLOW A How to check inverter compressor Disconnect the terminal of the compressor 3 minutes after turn ing on the power supply start EMERGENCY OPERATION y X After the outdoor fan starts running wait for 1 minute or more before measur ing the voltage oo NEE Output voltage is 50 130 V The voltage may differ according to the tester U BLK V WHT V WHT W RED No W RED U BLK Is there output voltage gt Yes Y gt Is output balanced T No y Is the input voltage to the outdoor electronic control Replace the power board ce board 370 V or more No Replacetheipower board Yes y Turn off power supply of indoor and outdoor unit and measure the compressor winding resistance between the compressor terminals No Is the resistance between each terminal normal es Replace the compressor Reconnect the lead wire of compressor and turn on power supply to indoor and outdoor unit 3 minutes later starts EMERGENCY OPERATION Clarify the causes by cou
29. N B 5 Distributed in Mar 2008 No OBH502 REVISED EDITION A 7 Distributed in Feb 2008 No OBH502 7 New publication effective Jul 2011 Made in Japan Specifications subject to change without notice
30. S6LNO 199N9 COON TBSNO _ 1031 2031 UVO8 9 d e cOLNO a ch TBLNO 2IN0819313 TO9NO 704 1N09 ooo Offs o 0 Ir CU Kei 118 118 118 81 o 106N9 EES 12 Hi MARD HI ONTLOINNOD LINA BOOONT OL 2409 aseyd AQEC B02 AlddfS HOM MUY D30NA MUY D36NA 19019 eutwsal CCO Q RIIPUL A0 3q SJOQU S BULJIM Pats 104 AJUO SIOJINPUOI 1addor asf GULITAJOS JO WEIGETP BULITM 211322 JIUN JOOPUT 38 0 138431 BUTJIA 1112913 APIS JOOPUI ay 3noqy SALON YOISINY3HI dW31 NIJ 31N00WN_83M0d IN391 1131NI YOLSINYJHI dWdl JOYVHOSIG HOLIMS JUNSSIUd HOIH vox HOLSISIY JINGOW HIMOd IN39I1131NI 1081 Y311041N09 YOLOVS HIMOd AQS2 1WST E1 35N3 329018 IVNIWN831 81 HOLSTHVA A0S2 TVE 91 JSN 32018 IVNIW83L Tal 4317113 3SION AOGE 1Vel 4SN4 Y01SIS3H 8 VLE68 HOLOW NVd YOLTOWdVO Y01SIS3H S9 991d YOSS3YdWO9 YINYOISNV8L IN388NO AV 134 YAWYOISNVYL INIHOLIMS HOISINUJHI AWIL HJ9NVH2X3 1V3H BOOOINO 8318 JAVA NOISNVdX3 A1 H2NNDIENNNT IN383802 2 TIO HOISIWH3HI dWIL IN3IENV 5918 yOLOV38 1 HOLIJVJVJ SNIH1OONS 182 JNVN TOENAS JWYN TOAWAS JWYN TOAWAS A31 MN ONTLO3NNOD vm d Geen 8918 918 6918 SdH e LINA 8000 5 Bee d a al el Ee Nj LHM VLEBY 9 0 Ave 2
31. SPF t minimum compressor Speed 70 ge 62 Heating High temperature Heating at minimum compressor Speed 70 60 47 Frost Accumulation at rated compressor Speed 70 60 35 Frost Accumulation at Intermediate compressor Speed Zb 70 60 35 3 5 At Intermediate compressor Speed Cooling rated compressor speed minimum compressor speed 3 minimum compressor speed OPERATING RANGE 1 POWER SUPPLY Rated voltage Guaranteed voltage V 208 230 V Min 187 208 230 Max 253 Outdoor unit 1 phase 60 Hz 2 OPERATION Intake air temperature F Condition Outdoor WB DB Standard temperature 67 95 Maximum temperature 73 115 Minimum temperature 57 14 Maximum humidity Standard temperature 60 47 Heating Maximum temperature 67 75 Minimum temperature 60 14 Cooling 4 OUTLINES AND DIMENSIONS MUZ D30NA MUZ D36NA MUY D30NA MUY D36NA 33 7 16 20 9 32 11 25 32 REQUIRED SPACE 16 15 16 sn ou 19 11 16 4 3 8x13 16 slot 3 3 16 gt 33 1 16 MN l i i S o A I E WS o i fi SS lt bz IN AN 0 RNY Open as a rule 20 inch or more if the back both sides and top are open Unit inch Open as a rule 20 inch or mor
32. _________ No beep r B No beep Beeps gt EE ee ee t s OFF eee de eee eeps Repeated cycle i 24 Repeated cycle Repeated cycle 3 Outdoor unit failure mode table MUZ D30NA MUZ D36NA MUY D30NA MUY D36NA LED indication Outdoor P C board The left lamp of OPERA TION INDICATOR lamp Indoor unit Abnormal point Failure mode protection LED 1 LED 2 Condition Indoor outdoor unit failure mode recall function Non Normal Lighting Lighting 2 time flash Outdoor power system Lighting IPM protection stop or lock protection stop is continuously performed 3 times within 1 minute after the compres sor gets started or converter protection stop or bus bar voltage protection stop is continuously performed 3 times within 3 minutes after start up Check the connection of the compressor connecting wire Refer to 10 5 How to check inverter compressor Refer to 10 5 Check of compressor start failure Check the stop valve Discharge temperature thermistor Once Defrost thermistor MUZ Once Ambient temperature thermistor Twice 3 time flash Fin temperature thermistor 3 times P C board temperature thermistor 4 times Outdoor heat exchanger tempera ture thermistor 9 times Thermistor shorts or opens during compressor running Refer to 10 5 Check of outdoor thermistors Replace the
33. ailure mode table Refer to 10 2 3 Make sure to check at least two consecutive blinking cycles 2 Make sure to check at least two consecutive blinking cycles 3 Releasing the failure mode recall function P Release the failure mode recall function by the following procedures Turn OFF the power supply and turn it ON again Press RESET button of the remote controller Y Repair the defective parts Deleting the memorized abnormal condition After repairing the unit recall the failure mode again according to Setting up the failure mode recall function mentioned above Press OPERATE STOP ON OFF button of the remote controller the set temperature is displayed with the remote controller headed towards the indoor unit Press EMERGENCY OPERATION switch so that the memorized abnormal condition is deleted Release the failure mode recall function according to Releasing the failure mode recall function mentioned above NOTE 1 Make sure to release the failure mode recall function once it is set up otherwise the unit cannot operate properly 2 If the abnormal condition is not deleted from the memory the last abnormal condition is kept memorized X2 Blinking pattern when the indoor unit is abnormal Blinking at 0 5 Blinking at 0 5 2 5 second OFF second interval 2 5 second OFF second interval lt et Er EN UA OFF ek lt gt lt gt POS gig COPS gg Dee
34. at specified Doing so may cause a burst an explosion or fire when the unit is being used serviced or disposed of Correct refrigerant is specified in the manuals and on the spec labels provided with our products We will not be held responsible for mechanical failure system malfunction unit breakdown or accidents caused by failure to follow the instructions Revision A 3 SPECIFICATION has been corrected Revision B e MULZ DehNA 209 and MUY D NA H1 have been corrected Revision C e Errors in TROUBLESHOOTING have been corrected 1 TECHNICAL CHANGES MUZ D30NA MUZ D30NA u MUZ D36NA MUZ D36NA u MUY D30NA MUY D36NA 1 New model MUZ D30NA MUZ D30NA 7 MUZ D30NA u1 MUZ D30NA u N MUZ D36NA MUZ D36NA m MUZ D36NA ur MUZ D36NA u2 MUY D30NA MUY D30NA MUY D36NA MUY D36NA 1 Wiring diagram has been changed 2 Fan motor has been changed ala a la 2 PART NAMES AND FUNCTIONS MUZ D30NA MUZ D36NA MUY D30NA MUY D36NA back and side Drain hose Air outlet Drain outlet map IN WR SPECIFICATION MSZ D30NA MSY D30NA MSZ D36NA MSY D36NA Cooling 1 Btu h 30 700 9 800 30 700 30 700 9 800 30 700 32 000 33 200 9 800 32 000 9
35. ck the stop valve Check the power module PAM module Goes ou Discharge temperature protec tion Temperature of discharge temperature thermistor exceeds 241 F 116 C compressor stops Compressor can restart if discharge temperature thermistor reads 212 F 100 C or less 3 minutes later Check the amount of gas and refrigerant circuit Refer to 10 5 Check of LEV Goes ou Fin temperature protection The fin temperature exceeds 189 F 87 C during operation P C board temperature pro tection The P C board temperature exceeds 158 F 70 C during operation Check around outdoor unit Check outdoor unit air passage Refer to 10 5 Check of outdoor fan motor High pressure protection The outdoor heat exchanger temperature exceeds 158 F 70 C during cooling or indoor gas pipe temperature exceeds 158 F 70 C during heating MUZ Check around of gas and the refrigerant circuit eCheck of stop valve Converter protection A failure is detected in the operation of the converter during operation Replace the power board Goes ou Bus bar voltage protection 1 The bus bar voltage exceeds 400 V or falls to 200 V or below during compressor operating Bus bar voltage protection 2 The bus bar voltage exceeds 400 V or falls to 50 V or below during compressor operating Check the voltage of power supply Replace the power board or the
36. connectors lt Electronic control P C board gt Propeller CN931 and CN932 Fan motor A 3 Remove the propeller 4 Remove the screws fixing the outdoor fan motor 5 Remove the outdoor fan motor Screws of the outdoor fan motor OPERATING PROCEDURE PHOTOS 6 Removing the compressor and 4 way valve Photo 9 1 Remove the top panel cabinet service panel and the back panel Refer to 1 2 Remove the inverter assembly Refer to 2 3 Remove the R V coil Refer to 3 4 Recover gas from the refrigerant circuit NOTE Recover gas from the pipes until the pressure gauge shows 0 PSIG 5 Detach the brazed part of the suction and the discharge pipe connected with compressor 6 Remove the compressor nuts 7 Remove the compressor 8 Detach the brazed part of 4 way valve and pipe Photo 8 Brazed parts of 4 way valve R V coil Photo 10 Brazed part of the discharge pipe Brazed part of the suction pipe 7 Removing the reactor 1 Remove the top panel cabinet service panel and the back panel Refer to 1 2 Disconnect the reactor lead wire 3 Remove the screws of the reactor and remove the reactor a MITSUBISHI ELECTRIC CORPORATION HEAD OFFICE TOKYO BLDG 2 7 3 MARUNOUCHI CHIYODA KU TOKYO 100 8310 JAPAN Copyright 2008 MITSUBISHI ELECTRIC CO LTD Distributed in Jul 2011 No OBH502 REVISED EDITION C Distributed in Jan 2009 No OBH502 REVISED EDITIO
37. e OPERATION INDICATOR lamp on the indoor unit is flashing on and off to indicate an abnormality To make sure check how many times the OPERATION INDICATOR lamp is flashing on and off before starting ser vice work 2 Before servicing check that the connector and terminal are connected properly 3 When the electronic control P C board seems to be defective check the copper foil pattern for disconnection and the components for bursting and discoloration 4 Refer to 10 2 and 10 3 22 10 2 FAILURE MODE RECALL FUNCTION Outline of the function This air conditioner can memorize the abnormal condition which has occurred once Even though LED indication listed on the troubleshooting check table 10 3 disappears the memorized failure details can be recalled This mode is very useful when the unit needs to be repaired for the abnormality which does not recur 1 Flow chart of failure mode recall function for the indoor outdoor unit This figures show about MSZ type Operational procedure The cause of abnormality cannot be found because the abnormality does not recur Setting up the failure mode recall function H Turn ON the power supply lt Preparation of the remote controller gt While pressing both OPERATION SELECT button and TOO COOL button on the remote controller at the same time press RESET button First release RESET button Hold down the other two buttons for another 3 seconds Confirm t
38. e if the front and both sides are open 4 inch or more 8 inch or more if there are obstacles to both sides Liquid 3 8 Gas AO WIRING DIAGRAM 5 MUZ D36NA MUZ D36NA D30NA u1 D30NA MUZ MUZ 1109 QIONSTOS SATIVA 9NISUJA3J2U BUTITAJAS JOJ WPIGEIP GUIJIM 91772873 UI JOOPUT ay 0 YOISINY3HI dN7I JOYVHOSIO 320 9 eutwsal CIT ORITPUT MO AG 5 0qW45 E BUIEN Pal 104 ALUO S10 INPUOD 13dd0I asf 7 Y 18181 BULJIM 1J J9 3 APIS JOOPUT ayy ynogy T JINGOW YIMOd IN391 173 1NI a AV 138 YOLSTWYSHL 1504430 HOLIMS JUNSSIUd HOIH Y3NYOJSNV8L ONTIHOLIMS 39018 IVNIWg3l1 YOLSTISIY YATIOYLNOD YOLOVS 3M0d ddd JINGOW YIMOd INJII TINI AOGETVST EN SNS Av138 1109 GIONI105 YOLSTYVA EE ANS IVE 91 35N3 HOLSIS JY HOLSIWUSHL WIL ON LVIH 3000100 431713 3SION JN A0S 1We1 35N3 YOLTOVdY YAWYOISNVYUL IN388N9 HOLSTIWYSHL dWdl INITEWV 4INYOISNVEL IN388NO dOLIIWAVI ONTHLOOWS 189 JWYN JWYN 108W4S 8914 914 1919 591y gt JHIA ONTLOINNOD LINA WU SdH of o ot ot Po WI 9 7 Abg 190 SAYIM ONTLOINNOO ER a LINA BOOON B oo Ir d Ir 2 I TE S6LN9 1031 2037 199M9 99 A A cOLNO T8LNO N T89N9 QUVO8 9 d TOHLNOD Lo 00000 oli slo T 91N0819313 7409 aseyd
39. g the setting 2 Set the 4th Dip Switch of SW1 on the outdoor electronic control P C board to EE ON to change the defrost finish temperature Refer to 10 6 1 le o y DO B H BE D 4th Dip Switch of SW1 Defrost finish temperature Jon Kat coef OFF Ge ade a8 U Initial setting 49 5 F 9 7 C L enm 5 TEELT o ON 64 9 F 18 3 C 21 10 TROUBLESHOOTING MUZ D30NA MUZ D36NA MUY D30NA MUY D36NA 10 1 CAUTIONS ON TROUBLESHOOTING 1 Before troubleshooting check the following 1 Check the power supply voltage 2 Check the indoor outdoor connecting wire for miswiring 2 Take care of the following during servicing 1 Before servicing the air conditioner be sure to turn OFF the main unit first with the remote controller and after con firming the horizontal vane is closed turn off the breaker and or disconnect the power plug 2 Be sure to turn OFF the power supply before removing the front panel the cabinet the top panel and the electronic control P C board 3 When removing the electrical parts be careful of the residual voltage of smoothing capacitor 4 When removing the electronic control P C board hold the edge of the board with care NOT to apply stress on the components 5 When connecting or disconnecting the connectors hold the housing of the connector DO NOT pull the lead wires Incorrect Correct Lead wiring Housing point 3 Troubleshooting procedure 1 First check if th
40. hat the indicators on the LCD screen shown in the right figure are all displayed Then release the buttons Y Press OPERATE STOP ON OFF button of the remote controller the set temperature is displayed with the remote controller headed towards the indoor unit 31 X1 Regardless of normal or abnormal condition a short Y beep is emitted once the signal is received Does the left lamp of OPERATION INDICATOR lamp on the Indoor unit is normal indoor unit blink at the interval of 0 5 seconds But the outdoor unit might be abnormal because there are some abnor Blinks Either indoor or outdoor unit is abnormal Beep is emit No malities that cannot be recalled with this way ted at the same timing as the blinking of the left lamp OFF Confirm if outdoor unit is abnormal according to the detailed outdoor of OPERATION INDICATOR lamp 2 unit failure mode recall function Refer to 10 2 2 Yes Judgment of indoor outdoor abnormality Blinks Before blinking does the left lamp of OPERATION INDICA TOR lamp stay ON for 3 seconds Stays ON for 3 seconds without beep Yes The outdoor unit is abnormal o The indoor unit is abnormal The outdoor unit is abnormal Check the blinking pattern and confirm the abnormal point with the indoor unit Check the blinking pattern and confirm the abnormal point with the failure mode table Refer to indoor unit service manual outdoor unit f
41. ile heating Replace the outdoor electronic Yes control P C board How to check miswiring and serial signal error Turn OFF the power supply 5 Is there rated voltage in the power supply No Check the power supply Y Yes Turn ON the power supply outdoor terminal block S1 and Y Is there rated voltage between S2 No Check the wiring yes Press EMERGENCY OPERATION switch once Y WK the left lamp of OPERATION INDICA TOR lamp light up lt Confirmation of the No power to the indoor unit gt Yes SS Y Is there any miswiring poor contact or wire disconnec Is serial signal error indicated 6 minutes later No tion of the indoor outdoor Yes connecting wire Yes Is fuse F65 or F66 broken No lt Y A Y Turn OFF the power supply Check once more if the indoor outdoor B connecting wire is not miswiring Short circuit outdoor terminal block S2 X1 Miswiring may damage indoor electronic control P C and S3 X1 board during the operation Be sure to confirm the wiring is correct before the opera tion starts Outdoor electronic control P C board Y X3 Be sure to check this within 3 minutes after turning ON Parts side Turn ON the power supply After 3 minutes LED blinks 6 times
42. it oper ates Lighting Primary current protection The input current exceeds 15 A Secondary current protection The current of the compressor exceeds 15 A Lighting High pressure protection MUZ The indoor gas pipe temperature exceeds 113 F 45 C dur ing heating Defrosting in cooling The indoor gas pipe temperature falls 37 F 3 C or below during cooling These symptoms do not mean any abnormality of the pro Checl Checl Checl cycled duct but check the following points if indoor filters are clogged if refrigerant is short if indoor outdoor unit air circulation is short Lighting Discharge temperature protec tion The discharge temperature exceeds 212 F 100 C during operation e Chec refrigerant circuit and refrigerant amount Refer to 10 5 Check of LEV Refer to 10 5 Check of outdoor thermistors Lighting Low discharge temperature protection The frequency of the compressor is kept 80 Hz or more and the discharge temperature is kept under 102 F 39 C for more than 20 minutes Refer to 10 5 Check of LEV Checl refrigerant circuit and refrigerant amount Lighting Cooling high pressure protec tion The outdoor heat exchanger temperature exceeds 136 F 58 C during operation This symptom does not mean any abnormality of the pro Checl Checl Checl cycled duct but check the following poin
43. l each other error indicated 6 Attach a filter minutes later on remote control receiving Replace the indoor electronic control P C board section of the Be sure to release the failure mode recall function indoor unit after checking 35 D Check of HPS 2 Check the resistance of HPS 1 minute after the outdoor unit power supply was turned OFF check the resistance between each terminal Infinity Replace HPS 0 O E Disconnect the connector CN681 in the electronic control P C board Reconnect CN681 Turn ON power supply to the indoor and outdoor unit 3 minutes later start EMERGENCY OPERATION y Is HPS protection displayed immediately after Replace the outdoor electronic compressor starts Yes control P C board No Y Check of bus bar voltage Confirm outdoor unit failure mode E the voltage of power supply recall function Refer to 10 2 2 the outdoor electronic control P C board Nu e ret LED1 indication lamp on ER 5 times Blink 6 times jae x Replace the outdoor elec Replace the outdoor elec Replace the power board gt tronic control P C board X tronic control P C board X Turn ON power supply Start Turn ON power supply Start operation operation Confirm LED1 indication lamp Confirm LED1 indication lamp
44. lose Yes ing of the antennas Even if all of the above conditions are fulfilled the electromagnetic noise may enter depending on the electric field strength or the installation condition combination of specific conditions such as antennas or wiring Check the followings before asking for service 1 Devices affected by the electromagnetic noise TV sets radios FM AM broadcast shortwave 2 Channel frequency broadcast station affected by the electromagnetic noise 3 Channel frequency broadcast station unaffected by the electromagnetic noise 4 Layout of indoor outdoor unit of the air conditioner indoor outdoor wiring grounding wire antennas wiring from antennas receiver Electric field intensity of the broadcast station affected by the electromagnetic noise Presence or absence of amplifier such as booster Operation condition of air conditioner when the electromagnetic noise enters in 1 Turn OFF the power supply once and then turn ON the power supply In this situation check for the electromagnetic noise 2 Within 3 minutes after turning ON the power supply press OPERATE STOP ON OFF button on the remote controller for power ON and check for the electromagnetic noise 3 After a short time 3 minutes later after turning ON the outdoor unit starts running During operation check for the elec tromagnetic noise 4 Press OPERATE STOP ON OFF button on the remote controller for power OFF when the outdoor unit
45. nting time until the inverter stops 0 to 10 seconds compressor rare short 10 to 60 seconds compressor lock 60 seconds to 5 minutes refrigerant circuit defective 5 minutes or more normal 30 Check of outdoor thermistors Disconnect the connector of thermistor in the outdoor P C board see N below table and measure the resistance of thermistor Y Replace the thermistor except RT64 Is the thermistor normal Refer to 10 6 1 N When RT64 is abnormal replace the Yes outdoor power board Y Reconnect the connector of thermistor Turn ON the power supply and press EMERGENCY OPERATION switch Does the unit operate for 10 minutes or more without showing thermistor abnormality No Replace the outdoor power board Ka OK Cause is poor contact Thermistor Connector Pin No Board Defrost MUZ Between CN661 pin1 and pin2 Discharge temperature Between CN661 pin3 and pin4 Outdoor heat exchanger temperature Between CN661 pin7 and pin8 Ambient temperature Between CN663 pin1 and pin2 Fin temperature Between CN3 pin1 and pin2 Outdoor power board Outdoor electronic control P C board 31 Check of R V coil MUZ D30 36 e Heating operation does not work 1 Disconnect the lead wire leading to the compressor 2 3 minutes after turning on the power supply start EMERGENCY OPERATION in HEAT mode
46. on the outdoor electronic con gt Normal k on the outdoor electronic con trol P C board Lighting Lighting trol P C board Blink 9 times Blink 9 times Replace the outdoor elec Replace the power board X tronic control P C board X X Turn OFF power supply before removing P C board 36 K Electromagnetic noise enters into TV sets or radios Is the unit grounded No Ground the unit Ke Is the distance between the antennas and the indoor unit within 9 91 ft or is the distance between the antennas and the outdoor unit within 9 91 ft K Is the distance between the TV sets or radios and the indoor unit within 3 28 ft or is the distance between the TV sets or radios and the outdoor unit within 9 91 ft Extend the distance between the antennas and the indoor unit and or the antennas and the Yes outdoor unit E EE Extend the distance between the TV sets and or radios and the indoor unit or the TV sets or Yes radios and the outdoor unit No Are the antennas damaged Is the coaxial cable damaged Is there any poor contact in the anten Replace or repair the antenna ah Yes Replace or repair the coaxial cable na wiring is Is the indoor outdoor connecting wire of Extend the distance between the indoor outdoor the air conditioner and the wiring of the connecting wire of the air conditioner and the wir antennas c
47. or 53 6 x 2 4 x 50 gt Refrigerant flow in cooling 11 MAX REFRIGERANT PIPING LENGTH and MAX HEIGHT DIFFERENCE Refrigerant piping ft Piping size O D in Model Max Length Max Height difference A B Liquid MUZ D30NA MUZ D36NA MUY D30NA MUY D36NA 50 3 8 Indoor unit Max Height difference B Max Length A Outdoor unit ADDITIONAL REFRIGERANT CHARGE R410A oz Refrigerant piping exceeding 25 ft requires additional refrigerant charge according to the calculation Outdoor unit Refrigerant piping length one way ft precharged 40 50 60 70 80 Model MUZ D30NA MUZ D36NA 4 Ib 10 oz Calculation X oz 2 96 5 oz ft x Refrigerant piping length ft 25 Outdoor unit Refrigerant piping length one way ft precharged 40 50 60 70 80 Model MUY D30NA MUY D36NA 4 lb Calculation X oz 1 08 5 oz ft x Refrigerant piping length ft 25 NOTE Refrigerant piping exceeding 25 ft requires additional refrigerant charge according to the calculation 12 7 DATA MUZ D30NA MUZ D36NA MUY D30NA MUY D36NA 7 1 PERFORMANCE DATA 1 COOLING CAPACITY Indoor air Outdoor intake air DB temperature F 85 95 105 SHC TPC TC SHC TPC TC SHC 71 17 8 3 75 16 7 4 04 15 6 MUZ D30NA 67 21 2 3 56 19 6 3 85 18 3 63 24 0 3 41 2
48. outdoor electronic control P C board Refer to 10 5 Check of outdoor thermistors 4 time flash Overcurrent 28 A current flow into intelligent power module Reconnect compressor con nector Refer to 10 5 How to check inverter compressor Refer to 10 5 Check of compressor start failure e Check the stop valve 5 time flash Discharge temperature Lighting Lighting Temperature of discharge temperature thermistor exceeds 241 F 116 C compressor stops Compressor can restart if discharge temperature thermistor reads 212 F 100 C or less 3 minutes later Check refrigerant circuit and refrigerant amount Refer to 10 5 Check of LEV 6 time flash High pressure Lighting Lighting The outdoor heat exchanger temperature exceeds 158 F 70 C during cooling or the indoor gas pipe temperature exceeds 158 F 70 C during heating MUZ Check refrigerant circuit and refrigerant amount e Check the stop valve Fin temperature Goes out The fin temperature exceeds 189 F 87 C during opera ion 7 time flash P C board temperature 4 times Goes out The P C board temperature exceeds 158 F 70 C during operation Check around outdoor unit Check outdoor unit air pas sage Refer to 10 5 0 Check of outdoor fan motor 8 time flash Outdoor fan motor Lig Lighting Failure occurs continuously 3 times within 30 seconds
49. perating Refer to 7 5 and 7 6 for the relationships between frequency and capacity 14 7 3 CONDENSING PRESSURE Cooling Data is based on the condition of indoor humidity 50 Air flow should be set to High speed MUZ D30NA PSIG 580 540 PSIG 2 500 150 g CF a re gt 460 1 140 Indoor DB temperatu 86 B 420 3 130 80 o o e g 3 380 2120 Ke E S a 340 110 Oo 300 100 260 N 90 6870 75 80 85 90 95 100 105 F 6870 75 80 85 90 95 100 105 F Outdoor ambient temperature Outdoor ambient temperature MUZ D36NA PSIG 580 540 PSIG 2 500 PRP YN g a 460 140 D o 5 erature CF 86 420 2 130 indoor DB temp o o 80 pel 2 8 380 s 120 BEE 340 3 110 GES D r 300 100 260 I 90 6870 75 80 85 90 95 100 105 F 6870 75 80 85 90 95 100 105 F Outdoor ambient temperature Outdoor ambient temperature MUY D30NA PSIG 580 540 88 PSIG 500 oe dp 150 a af o 460 ef 140 ture CF 86 2 pe o indoor DB temper 5 g 5 420 weer 130 80 s
50. ps _ y Beeps Beeps Beeps Repeated cycle Repeated cycle Yt X3 Blinking pattern when the outdoor unit is abnormal ae Blinking at 0 5 Blinking at 0 5 2 5 second OFF 3 second ON second interval 2 5 second OFF 3 second ON second interval lt gt lt gt lt gt lt gt gt lt gt ee O e nn OFF i q o lt lt gt w E e e gt No beep Beeps pie No beep i Beeps p Repeated cycle i Repeated cycle j Repeated cycle 23 2 Flow chart of the detailed outdoor unit failure mode recall function Operational procedure The outdoor unit might be abnormal Confirm if outdoor unit is abnormal according to the following procedures Y Confirm that the remote controller is in the failure mode recall function With the remote controller headed towards the indoor unit press TOO COOL or TOO WARM button to adjust the set temperature to 77 F 25 C i Does left lamp of OPERATION INDICATOR lamp on the indoor unit blink at the interval of 0 5 seconds Blinks The outdoor unit is abnormal Beep is emitted No at the same timing as the blinking of the left OFF lamp of OPERATION INDICATOR lamp 2 2x1 Regardless of normal or abnormal condition 2 short beeps are emitted as the signal is received Yes Gin The outdoor unit is abnormal Check the blinking pattern and confirm the abnormal point with the out door unit failure mode table 10
51. rotection stop is continuously performed 3 times within 3 minutes after start up e Check the connection of the compressor connect ing wire Refer to 10 5 How to check inverter compres sor Refer to 10 5 Check of compressor start failure e Check the stop valve Lightning Discharge temperature therm istor Ashort circuit is detected in the thermistor during opera tion or an open circuit is detected in the thermistor after 10 minutes of compressor start up Refer to 10 5 Check of outdoor thermistors Lightning 4 times Fin temperature thermistor P C board temperature therm istor Ashort or open circuit is detected in the thermistor during operation Refer to 10 5 Check of outdoor thermistors Replace the outdoor electronic control P C board Lightning 5 times Ambient temperature thermis or Ashort or open circuit is detected in the thermistor during operation Outdoor heat exchanger emperature thermistor A short circuit is detected in the thermistor during operation or an open circuit is detected in the thermistor after 5 minutes in cooling and 10 minutes in heating MUZ of compressor start up Defrost thermistor MUZ Ashort circuit is detected in the thermistor during operation or an open circuit is detected in the thermistor after 5 minutes of compressor start up Refer to 10 5 Check of outdoor thermistors Lightning
52. tem 5 X tem GZ ze Pera 67 LS 29 Pera 67 ES 26 Pers 67 ure rd 63 ture r 63 re rd 63 24 E 27 FE 24 F e e o T o T 2 E E a 45 SE B 52 er B 40 oF E 43 ayes A E ave A E 38 ase e el pe 67 3 41 Res wem 63 Z 48 NS ed 63 Z 36 wee E 8 Si EM Eo ait Sr Bit 8 z 3 9 nere 8 Z 44 wiae LA 8 3 4 nee 5237 ooo PE w ss s 3 2 w z 3 5 4 0 3 0 2 33 a 36 2 28 3 34 gt B 26 o o o E 65 75 85 95 105 115 E 65 75 85 95 105 115 e 65 75 85 95 105 115 utdoor intake air temperature utdoor intake air temperature utdoor intake air temperature Outdoor intake air DB F Outdoor intake air DB SF Outdoor intake air DB te ture F SHF at rating condition 0 62 Airflow 763 CFM 46 42 gt gt 38 33 m S 34 ge es 26 amp 2 5 0 2 4 6 SS 83 42 s 3 8 34 o E 65 75 85 95 105 115 Outdoor intake air DB temperature F Heating Airflow 848 CFM i 45 s5 db Airflow 848 CFM o 70 40 e 75 43 ca 6 E BEN 35 AD eg 38 geer EE 30 axe Ay ze e os NE SE 33 A 22 w rft ER goo 8 m 25 So 28 Ka 2 So BES 20 BO 23 ER e x 15 ES 48 Ss ES 2 40 oF S 45 F ture C Ta a re C 5 mer 70 E 70 g 98 eg DB e 65 5 41 An en E SS 32h mao 83 37 mae A E Ze ooo 2 28 S 33 9 S 5 24 2 29 S 8 e E 15 25 35 45 55 P 15 25 35 45 55 Outdoor intake air WB temperature F Outdoor intake air WB temperature F This value of frequency is not the same as the actual frequency in o
53. terns of this mode differ from the ones of Troubleshooting check table 10 3 25 LED indication Out The left lamp of OPERA Abnormal point door P C board TION pida lamp Failure mode protection Indoor outdoor Condition Remedy unit failure mode recall function LED 1 LED 2 A failure is detected in the operation of the converter dur Check the voltage of ing operation power supply e Replace the power board Converter 5 times Goes out The bus bar voltage exceeds 400 V or falls to 200 V or Bus bar voltage 1 5 times Goes out below during compressor operating 11 time flash e Check the voltage of Bus bar voltage 2 power supply X Even if this protection stop e Replace the outdoor is performed continuously 3 times it does not mean the abnormality in outdoor power system The bus bar voltage exceeds 400 V or falls to 50 V or electronic control P C Goes out below during compressor operating board 26 10 3 TROUBLESHOOTING CHECK TABLE MUZ D30NA MUZ D36NA MUY D30NA MUY D36NA Indication Symptom LED Red LED2 Yellow Abnormal point Condition Condition Remedy Outdoor unit does not oper ate Lightning Outdoor power system IPM protection stop or lock protection stop is continuously performed three times within 1 minute after the compressor gets started or converter protection stop or bus bar voltage p
54. ts if indoor filters are clogged if refrigerant is short if indoor outdoor unit air circulation is short Outdoor unit oper ates 9 times Lighting Inverter check mode The unit is operated with emergency operation switch Lighting Lighting Normal 28 10 4 TROUBLE CRITERION OF MAIN PARTS MUZ D30NA MUZ D36NA MUY D30NA MUY D36NA Part name Check method and criterion Defrost thermistor RT61 MUZ Ambient temperature thermistor RT65 Outdoor heat ex changer temperature thermistor RT68 Fin temperature thermistor RT64 Measure the resistance with a tester Refer to 10 6 Test point diagram and voltage 1 Outdoor electron ic control P C board for the chart of thermistor Discharge tem perature thermistor RT62 Measure the resistance with a tester Before measurement hold the thermistor with your hands to warm it up Refer to 10 6 Test point diagram and voltage 1 Outdoor electron ic control P C board for the chart of thermistor Measure the resistance between terminals using a tester Temperature 14 104 F 10 40 C Normal 1 24 1 530 Outdoor fan motor Measure the resistance between lead wires using a tester Temperature 14 104 F 10 40 C Color of lead wire Normal RED BLK BLK WHT WHT RED 13 160 R V coil
55. uilt in transformer 12 24 VDC Refrigerant piping Not supplied Refrigerant pipe size Min wall thickness Liquid 3 8 0 0315 Gas 5 8 0 0394 Connection method Indoor Outdoor Flared Between the indoor 8 outdoor units Height difference 50 Piping length 100 Refrigerant charge R410A NOTE Test conditions are based on ARI 210 240 3 4 Rating conditions eating 3 2 Heating Heating 4 lb 10 oz Indoor 80 FDB 67 FWB Outdoor 95 FDB 75 FWB Indoor 70 FDB 60 FWB Outdoor 47 FDB 43 FWB Indoor 70 FDB 60 FWB Outdoor 17 FDB 15 FWB 4 lb 10 oz Rated frequency Rated frequency Maximum frequency Test condition 53 54 Indoor air condition F Outdoor air condition F Test Dry bulb Wet bulb Dry bulb Wet bulb A Cooling Steady State at rated compressor Speed B 2 Cooling Steady State at rated compressor Speed 80 67 95 75 80 67 82 65 SEER B 1 Cooling Steady State Cooling at minimum compressor Speed 80 67 82 65 Low ambient Cooling Steady State at minimum compressor Speed 80 67 67 53 5 Intermediate Cooling Steady State at Intermediate compressor Speed 5 0 67 87 69 Standard Rating Heating at rated compressor Speed 70 60 47 43 Low temperature Heating at rated compressor Speed 10 20 17 15 Max temperature Heating H
56. ure 468 404 480 420 453 475 Suction pressure 126 96 122 94 125 119 Discharge temperature 186 8 169 7 198 7 168 8 191 3 197 1 Condensing temperature 126 5 114 3 128 5 117 0 123 8 127 4 Suction temperature 45 5 29 8 48 0 29 1 54 7 48 6 Comp shell bottom temperature 175 6 156 4 187 0 155 7 177 4 182 7 Ref pipe length Refrigerant charge R410A 4 Ib 10 oz Indoor unit 80 70 80 80 80 Intake air temperature 67 60 67 67 67 53 53 7 51 7 Discharge air temperature 53 52 1 52 8 50 8 Fan speed High 1 1 Airflow High 741 Wet 738 Wet 718 Wet 710 Wet Outdoor unit 95 95 95 95 Intake air temperature Fan speed Airflow 17 7 5 CAPACITY AND INPUT CORRECTION BY INVERTER OUTPUT FREQUENCY MUZ D30NA Correction of Cooling capacity 1 5 2 E 5 ba 10 3 5 E 8 5 gt 3 0 5 oe ba 3 a a D 3 5 100 150 Hz 0 0 The operational frequency of compressor MUZ D36NA Correction of Cooling capacity 1 5 1 0 0 5 Input correction factors T Capacity correction factors X 0 50 0 150 Hz The operational frequency of compressor MUY D30NA Correction of Cooling capacity 1 5 1 0

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