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Mitsubishi Electronics MSZ-FA35VA User's Manual

1. Installation plate Installation plate fixing screw 4 x 25 mm MITSUBISHI ELECTRIC TOO ri TOO ON OFF Temperature buttons Indication of remote controller Open the front lid model is on back WIDE VANE button Vertical vane button OFF TIMER button ON TIMER button TIME SET buttons FORWARD button BACKWARD button CLOCK SET button VANE CONTROL button Horizontal vane button 3 SPECIFICATION Function Healing Heating Power supply Single phase Single phase 230V 50Hz 230V 50Hz mi apacit Air flow High Med Low 474 354 252 498 384 264 474 354 258 498 384 276 ower outlet 3 5 3 gt 2 C2 lt A ower input 1 uxiliary heater j 10 4 42 10 ower factor 1 0 4 Electrical 0 gt 0200 c 5 5 5 x gt 23 gt an motor current 1 A 0 25 an motor RC0J40 EB Dimensions WxHxD mm 1 Air direction Sound level High Med Low 3677294722 Q Fan speed Super High rpm Fan speed High Med Low rpm 1 010 800 610 1 050 850 640 1 010 800 630 1 050 850 660 Fan speed regulator Thermistor RT13 at25C Hemote controller model KMO05A KMO05A When outdoor unit is MXZ type Indoor model MSZ FA25VA 1 MSZ FA35VA E1
2. Replace the front panel driving motor unit Z Z side view 28 D Electromagnetic noise enters into TV sets or radios Is the unit earthed Earth the unit Extend the distance between Yes the antennas and the indoor unit or the antennas and the outdoor unit Yes Is the distance between the antennas and the indoor unit within 3m or is the distance between the antennas and the outdoor unit within 3m Is the distance between the TV sets or radios and the indoor unit within 1m or is the distance between the TV sets or radios and the outdoor unit within 3m Yes Extend the distance between the TV sets or radios and the indoor unit or the TV sets or radios and the outdoor unit Is there any antennas damage by rust or something coaxial cable damage or poor contact such as loosing of the connectors or wire disconnection of wiring of the antennas Yes Replace the antennas Replace the coaxial cable Is the indoor outdoor Extend the distance between connecting wire of the air the indoor outdoor connecting conditioner and the wiring of wire of the air conditioner and the antennas in close the wiring of the antennas Even if all of the above conditions is fulfilled the electromagnetic noise may enter depending on the electric field strength or the installation condition combination of specific conditions such as
3. Function Cooling Heating 546 dB A 36 29 21 36 29 22 gt x O NOTE Test conditions are based on ISO 5151 Cooling Indoor Dry bulb temperature 27 C Wet bulb temperature 19 C Outdoor Dry bulb temperature 35 C Wet bulb temperature 24 C Heating Indoor Dry bulb temperature 20 C Wet bulb temperature 15 C Outdoor Dry bulb temperature 7C Wet bulb temperature 6C Refrigerant piping length one way 5m Reference value 1 Measured under rated operating frequency Specifications and rating conditions of main electric parts INDOOR UNIT Fuse Fi MSBPC20M11 12V DC 3000 at 25 C 4 NOISE CRITERIA CURVES MSZ FA25VA m 1 FAN SPEED FUNCTION SPL dB A LINE Super High Test conditions OCTAVE BAND SOUND PRESSURE LEVEL dB re 0 0002 MICRO BAR Cooling Dry bulb temperature 27C Wet bulb temperature 19 C Heating Dry bulb temperature 20C Wet bulb temperature 15 C 80 70 60 2 Q 50 40 z Q A e 30 APPROXIMATE THRESHOLD OF HEARING FOR CONTINUOUS NOISE 63 125 lt o OCTAVE BAND SOUND PRESSURE LEVEL dB 0 0002 MICRO BAR zq a EE EE Se x LL SS NE aS x 250 500 1000 2000 4000 8000 BAND CENTER FREQUENCIES Hz MSZ FA35VA FAN SPEED FUNCTION SPL dB A LINE Super High Test conditions Cooling Dr
4. Indoor unit Test Run operation If blinking of OPERATION means the operation INDICATOR lamp cannot within 30 minutes after be checked it can be checked EMERGNCY OPERATION with failure mode recall function switch is pressed OPERATION OPERATION doesn t receive the signal from remote controller INDICATOR lamp on the indoor unit is flashing on INDICATOR lamp on the indoor unit switch is pressed Refer to 9 6 8 Check of remote controller Indoor unit operates when EMERGENCY OPERATION 1 Check indoor outdoor connecting wire Test point diagram and voltage compressor and receiver P C board and off stays off PLASMA WASH lamp 2 time flash Cause Indoor unit Trouble of PLASMA DEODORIZNG power control or PLASMA AIR PURIFYING power control Indoor unit doesn t operate when EMERGENCY OPERATION switch is pressed Replace the indoor electronic control P C Check if the power board is supplied to the indoor unit 2 Refer to 9 6 Check of indoor electronic control P C board and indoor refer to service manual OB372 As for outdoor unit MXZ type an motor refer to service manual OB377 Alllamps Flash on and off at 0 5 second Intervals Cause Indoor unit The horizontal vane is not installed correctly Refer to 9 6 Check of installation of the horizontal vane
5. Is the fuse F11 blown only Measure the resistance between and of the indoor fan motor connector to CN211 on the indoor electronic control P C board 33 Short circuit The indoor fan motor is abnormal Is the resistance 1MQ Replace the fuse F11 Measure the cement resistance R111 on the indoor electronic control P C board Yes Indoor electronic control P C Board 211 CO Varistor NH1 1 Hi CN201 approx 40 Fuse F11 23 Is the resistance Short circuit Replace the front panel driving motor and the indoor electronic control P C board Short circuit Replace i see Sensor motor and the indoor electronic control P C board Short circuit Replace the indoor fan motor Short circuit Replace the horizontal vane motor the vertical vane motor and the indoor electronic control P C board 1 The fan motor connector s lead wire is red whereas is black 3 2 Connect of the tester to fan motor connector s lead wire and to lead wire otherwise the resistance cannot be measured properly No arora Replace the fuse F11 and the indoor fan motor Replace the indoor electronic control P C board and the indoor fan motor Replace the indoor electronic control P C board When POWER lamp flashes ON and OFF every 0 5 second Outdoor unit does not operate D How to check mis wiring and serial signal error Tur
6. K connector CN112 3 Remove the switch holder and the electrical cover E See Photo 4 Tai Connector of the 4 Remove the ground wire connected to the heat exchanger PE is ME plasma power from the electrical box See Photo 5 Wk P C board CN1T1 5 Disconnect the following connectors on the electronic nmin Connector of the control P C board the fan motor connector lt 211 gt the safety device Plasma indoor coil thermistor connector CN112 the vane motor _ unit CN1T2 connector lt CN151 gt the connector of the interlock switch 4 RSS Vane motor Fan of the horizontal vane lt CN1R1 gt the connector of EW SER connector CN151 the safety device plasma unit lt CN1T2 gt the connector of TW the plasma power P C board lt CN1T1 gt the connector of 2 the front panel driving motor lt CN1U1 gt A Connector of the 6 Unhook the catches of the electrical box and pull out the front panel driving electrical box See Photo3 Power monitor motor CN1U1 receiver P C _ i see Sensor board holder i see Sensor cover OPERATING PROCEDURE PHOTOS 4 Removing the horizontal vane motor unit 1 Remove the horizontal vane and the panel Refer to 1 2 Remove the screws of the horizontal vane motor unit and pull out the horizontal vane motor unit See Photo 6 3 Disconnect the connector from the horizontal vane
7. 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 5 Electric field intensity of the broadcast station affected by the electromagnetic noise 6 Presence or absence of amplifier such as booster 7 Operation condition of air conditioner when the electromagnetic noise enters 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 electromagnetic noise 4 Press OPERATE STOP ON OFF button on the remote controller for power off when the outdoor unit stops but the indoor outdoor communication still runs on In this situation check for the electromagnetic noise After checking the above consult the service representative 29 xl O 9 7 Test point diagram and voltage MSZ FA25VA
8. n MSZ FA35VA Em Indoor electronic control P C board 12V DC Cement resistance R111 Power supply input 230V AC le SW Board Rz WASH _ switch SW2 09 9 Q Emergency operation switch SW1 G G G DIP M i gt Tu eus i S a o 7 o LT o 9 o o o IC1 54 z c o N o e e a L X 0 90 6 o a Vi 9 o A JRTU D101 A lt o O0Oo00o000000 0 o IC155 o0o00000 o gt DM76Y401G02 L Power monitor i see Sensor receiver P C CN110 board Release of Auto restart function Solder the Jumper wire to JR07 Refer to 8 3 Plasma power P C board DC 2 5V during PLASMA AIR PURIFYING PLASMA DEODORIZING operation GND DC 12 5V during PLASMA AIR PURIFYING PLASMA DEODORIZING operation Red Standard lead wire Green 30 Fuse F11 Indoor fan motor CN211 D311V DC 3 Fiducial terminal of cathode side on measur ing high voltage DC 15V DC 3 6V DC 0V DC or 15V DC Interlock switch Fan CN1R1 Ola wt t NI e 2 L0 temperature thermistor CN111 Varistor NR11 CN2010 Used for check of con ducting of thermal
9. E0 WH 11 1 INDOOR UNIT STRUCTURAL PARTS 11 2 ACCESSORY AND REMOTE CONTROLLER 10 Le 11 1 INDOOR UNIT STRUCTURAL PARTS Symbol Part name in Wiring MSZ FA25VA E MSZ FA35VA 1 Diagram WH WH 1 1 E02 897 234 BOX T 2 E02 913 000 PANEL ASSEMBLY WH 1 1 Including No 3 4 3 E02 913 067 SCREWCAP 2 2 X gQPCSSET 4 E02 913 010 FRONTPANEL WH 1 1 5 E02 914 100 AIRFILTER LEFT 1 1 6 E02 913 100 AIRFILTER RIGHT 7 E02 913 975 CORNER RIGHT 8 E02 913 970 INSTALLATIONPLATE 11 2 ACCESSORY AND REMOTE CONTROLLER 9 E02 913 426 CONTROLLER j 10 E02 527 083 REMOTE CONTROLLER HOLDER 1 MSZ FA25VA WH MSZ FA35VA En WH 11 3 INDOOR UNIT ELECTRICAL PARTS AND FUNCTIONAL PARTS SAFETY PLASMA 30 DEVICE 29 POWER 27 26 25 24 20 P C BOARD 4 2 SLEEVE SER BEARING SERERBEE y f m M Mp lj HM fj N m Mf 7 j My S amp S INTERLOCK NN SWITCH 6 FAN POWER MONITOR RECEIVER P C BOARD i see Sensor POWER MONITOR 11 RECEIVER P C MOTOR BOARD HOLDER 12 i see Sensor 9 FUSE VARISTOR 7 NR11 ROOM TEMPERATURE THERMISTOR 11 4 INDOOR UNIT HEAT EXCHANGER
10. EMERGENCY OPERATION switch is pressed CN211 Indoor electronic control P C board Replace the indoor fan motor Replace the indoor electronic control P C board The indoor fan motor error has occurred and the indoor fan repeats 12 second ON and 30 second OFF 3 times and then stops Replace the indoor electronic control P C board Changed Measure the voltage between CN211 and while the fan motor is rotating Is it unchanged holding OV DC or 15V DC Unchanged Replace the indoor fan motor 21 Indoor unit operates by pressing EMERGENCY OPERATION switch but does not operate with the remote controller of remote controller and receiver P C board Check if the remote controller is exclusive for this air conditioner Switch on the remote controller Is LCD display on the the remote contr lier visible Replace the batteries Refer to 9 1 4 not clear Remove the batteries then set them back and press RESET button Refer to 9 1 4 Check if the unit operates with the remote controller Does the unit operate with the No Turn on a radio to AM and press switch on remote controller the remote controller Yes No lt Is noise heard from radio gt Replace the remote controller Y Yes Are there any fluorescent lights of Yes inverter or rapid start type within the range of 1m Reinst
11. 1 874 or above 3 387V DC 1 010 1 420V Below 1 010 or above 1 420V DC NOTE Pay attention to static electricity PLASMA DEODORIZING PLASMA AIR PURIFYING Check 9 6 D or 9 power 20 9 6 Troubleshooting flow When POWER lamp flashes 3 time Indoor fan does not operate A Check of indoor fan motor Turn OFF the power supply Insert a stick such as a screw driver into the air outlet and check if there is any catch in the rotation of the line flow fan Pay careful attention to the high voltage on the fan motor connector CN211 Turn ON the power supply wait 5 seconds or more and then press EMERGENCY OPERATION switch Is there any foreign matter that Measure the supply voltage as follows within 12 seconds interferes the rotation of the after EMERGENCY OPERATION switch is pressed line flow fan If more than 12 seconds passes by turn OFF the power supply and turn ON it again then measure the voltage 1 Measure the voltage between CN211 and GX 2 Measure the voltage between CN211 and Adi d 12 seconds or more passes after EMERGENCY OPERATION switch just ing p is pressed the voltage mentioned above 2 goes OV DC although the remove the foreign matter indoor electric control P C board is normal Is there 311V DC between CN211 and does the voltage between CN21 1 and GX rise to the range of 3 to 6V DC within 12 seconds after
12. 33 HLL 7 7 7777 34 35 36 11 3 INDOOR UNIT ELECTRICAL PARTS AND FUNCTIONAL PARTS Symbol Part name in Wiring MS7 FA25VA e MSZ FA35VA ET Diagram WH WH F 1 E02 751 509 BEARINGMOUNT 2 E02 001 504 SLEEVEBEARING J 1 1 3 E02 897 702 DRANHOSE T 1 1 4 E02 913 235 NOZZLEASSEMBLY J 1 1 5 E02 897 303 VANE MOTOR UNIT HORIZONTAL MV1 1 1 UP amp DOWN 6 E02 897 316 INTERLOCK SWITCH FAN J 1 1 7 E02 913 303 MOTOR UNIT VERTICAL MV2 1 1 RIGHT amp LEFT 8 E02 913 040 HORIZONTALVANE J 1 1 9 E02 127 382 FUSE Fd 1 1 BASA 10 E02 661 385 VARISTOR NR 1 1 11 E02 913 095 POWERMONTORRECEVERPC BONRDHOLER 1 1 0 12 E02 913 391 1 Sensor RR 1 1 13 E02 914 303 isseeSensorMOTOR MT 1 1 14 E02 897 784 VA CLAMP 9 1 1 15 E02 897 780 TERMNALBLOCKCOVER 1 1 16 E02 897 779 TERMINALBLOCKHOLDER 1 Z 1 17 E02 913 375 TERMINALBLOCK TB 1 1 E02 913 452 ELECTRONIC CONTROL P C BOARD 1 1 AUTORESTART E02 914 452 ELECTRONIC CONTROL BOARD 1 _ 1 J AUTORESTART 9 E02 897 308 ROO
13. Abnormal electric discharge error 2 PLASMA DEODORIZING PLASMA AIR PURIFYING power When the room temperature thermistor short or open circuit is detected every 8 seconds during operation When the indoor coil thermistor short or open circuit is detected every 8 seconds during operation When the serial signal from outdoor unit is not received for a maximum of 6 minutes When the rotational frequency feedback signal is not emit during 12 second the indoor fan operation When it cannot properly read data in the nonvolatile memory of the indoor electronic control P C board Refer to the characteristics of the room temperature thermistor 9 7 Refer to the characteristic of the indoor coil thermistor the sub indoor coil thermistor 9 7 Refer to 9 6 How to check miswiring and serial signal error Refer to 9 6 Check of indoor fan motor Replace the indoor electronic control P C board When PLASMA DEODORIZING PLASMA AIR PURIFYING power cannot be turned OFF When the voltage between CN1 and GND on the PLASMA POWER board PLASMA DEODORIZING or PLASMA AIR PURIFYING falls below 1 6V spark discharge judgment voltage When the voltage between CN1 and G GND on the PLASMA POWER board PLASMA DEODORIZING or PLASMA AIR PURIFYING falls 0 9V below the normal range voltage When the voltage between CN1 and GND on the PLASMA POWER board PLASMA DEOD
14. BLU CONNECTING RED ewe RED GRN 4 3 3 INTERLOCK SW P C MP SWITCH FAN BOARD PLASMA PLASMA_D POWER MONITOR RR SAFETY DEVICE RECEIVER P C BOARD PLASMA UNIT PLASMA AIR PURIFYING FILTER UNT FRONT PANEL DRIVING MOTOR PLASMA D PLASMA DEODORIZING FILTER UNIT TERMINAL BLOCK i see Sensor MOTOR RR jiseeSenso VANE MOTOR HORIZONTAL 11 ROOMTEMPERATURETHERMISTOR gt Gv NOTE 1 About the outdoor side electric wiring refer to the outdoor unit electric wiring diagram for servicing 2 Use copper conductors only For field wiring 3 Symbols below indicate Terminal block T T 1 Connector 7 REFRIGERANT SYSTEM DIAGRAM MSZ FA25VA E MSZ FAS35VA E1 Unit mm INDOOR UNIT Refrigerant pipe 9 52 INDOOR UNIT Refrigerant pipe 9 52 with heat insulator with heat insulator Flared connection Indoor coil thermistor RT12 main Indoor coil thermistor RT12 main main Flared connection Indoor coil thermistor RT13 sub Indoor coil thermistor RT13 sub Room temperature Room temperature thermistor thermistor RT11 HT11 Flared connection Flared connection Refrigerant pipe 6 35 Refrigerant pipe 6 35 gt Refrigerant flow in cooling with heat insulator with heat insulator Refrigerant flow in heating MSZ FA25VA E1 MSZ FA35VA 8 1 TIMER SHORT MODE For servi
15. measures make sure that the symptom reappears for accurate troubleshooting Self check table Abnormal Mis Wiring Operation indicator lamp POWER lamp llashes 0 5 second ON or serial signal Vv V V V d eoeoeoeo EX EN iA 0 5 second OFF Outdoor control POWER lamp lights up system Indoor coil thermistor POWER lamp flashes 2 time flash _ V p tempera ture 2 5 second OFF thermistor POWER lamp flashes 3 time flash Indoor fan motor 00 00080808000 L Outdoor 2 5 second OFF POWER lamp flashes 5 time flash POWER lamp flashes 6 time flash Outdoor thermistors Outdoor POWER lamp flashes 7 time flash control system Other POWER lamp flashes 14 time flash OOF OO abnonmality W 0000000 2 5 second OFF Outdoor unit does not operate Outdoor unit does not operate Indoor unit and outdoor unit do not operate Indoor unit and outdoor unit do not operate Indoor unit and outdoor unit do not operate Indoor unit and outdoor unit do not operate Indoor unit and outdoor unit do not operate Indoor unit and outdoor unit do not operate Flashing of POWER lamp indicates abnormalities Detection method When the serial signal form the outdoor unit is not received for a maximum of 6 minutes When it cannot properly read data in the nonvolatile memory of the inverter P C board or
16. not more distance is not more than 50 cm than 50 cm Left Center Right Is the indoor unit in stalled at right left or NOTE If the indoor unit is installed more than 50 cm away from the side walls cabinets or other nearby objects set the slide switch to the center position 9 TROUBLESHOOTING MSZ FA25VA E MSZ FAS35VA 9 1 Cautions on troubleshooting 1 Before troubleshooting check the following 1 Check the power supply voltage 2 Check the indoor outdoor connecting wire for mis wiring 2 Take care the following during servicing 1 Before servicing the air conditioner be sure to turn off the unit first with the remote controller and then after confirming 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 electronic control P C board hold the edge of the board with care NOT to apply stress on the components 4 When connecting or disconnecting the connectors hold the housing of the connector DO NOT pull the lead wires X O re Lead wiring Housing point 3 Troubleshooting procedure 1 First check if the OPERATION INDICATOR lamp on the indoor unit is flashing on and off to indicate an abnormality To make sure check how many times the abnormality indication is flashing on and off be
17. procedure lock the stoppers until they click into place w Ws SOS its Insert this end first x C O 6 How to remove and install PLASMA DEODORIZING AIR PURIFYING filter units If PLASMA WASH lamp on the indoor unit blinks clean the filters as soon as possible The lamp will start blinking when accumulated operating time exceeds 330 hours Figure 1 Remove 1 Switch the indoor unit OFF with the remote controller and disconnect the power supply plug and or turn OFF the breaker M NOTE Otherwise you may get injured since PLASMA H DEODORIZING AIR PURIFYING filter units are s Hi charged with high voltage En 2 Hold the knobs on both sides of the front panel and lift the panel up until its level _ 3 Remove the anti mold air filter See Figure 1 4 R
18. refer to service manual OB372 As for outdoor unit MXZ type refer to service manual OB377 Repair the defective parts Deleting the abnormal condition After repairing the unit recall the failure mode again according to Setting up the failure mode recall function mentioned above 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 Note1 Make sure to release the failure mode recall function once it s set up otherwise the unit cannot operate properly 2 1 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 OFF second interval gt 1 rn ty p 47 4 qp Ve gt HR Beeps Beeps Beeps Repeated cycle Repeated cycle i Repeated cycle 3 Blinking pattern when the outdoor unit is abnormal EN 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 ON oo ey thy r No beep Beeps gt j No bee Beeps i Repeated cycle Repeated cycle Repeated cycle 14 2 Flow chart of PLASMA DEODORIZING PLASMA AIR PURIFYING power failure mode recall function Operat
19. temperature to 24 C Does POWER lamp on the indoor No Indoor unit is normal pink ihe interval of 0 5 seconds OFF There is a possibility that the plasma or outdoor unit is abnormal Blinks Either indoor or outdoor unit is abnormal Confirm the presence of abnormality according to the flow chart of the Beep sounds are emitted at the same timing the prasma unit or detailed outdoor unit failure mode recall function of the blinking of POWER lamp X2 Judgment of indoor outdoor abnormality Before blinking does POWER Yes lamp stay ON for 3 seconds Stays ON for 3 seconds without beep The outdoor unit is abnormal NO The indoor unit is abnormal The outdoor unit is abnormal Check the blinking pattern and refer to confirm the Check the blinking pattern and refer to confirm the abnormal point abnormal point 9 2 4 Make sure to check at least two consecutive blinking cycles 3 Make sure to check at least two consecutive blinking cycles 2 Releasing the failure mode recall function Release the failure mode recall function by the following procedures CDWith the remote controller headed towards the indoor unit press any button that is not used in this failure mode recall function e g TIMER button OR DTurn OFF the power supply and turn ON it again Press RESET button of the remote controller Yes Blinks As for outdoor unit MUZ type
20. the above detection method has detected an abnormality the first detection after the power ON the indoor electronic control P C board turns OFF the indoor fan motor with OPERATION INDICATOR lamp flashing 18 POWER R Lighted i Blinking PLASMA WASH Netlghted Flashing of AREA lamp left hand side lamp indicates abnormality NOTE Before taking measures make sure that the symptom reappears for accurate troubleshooting Self check table Abnormal point No Operation indicator lamp Left lamp of AREA lamp flashes 4 time flash 600600000000080 V fn L jJ 2 5 second OFF POWER 1 a i Blinking PLASMA WASH Abnormal No Operation indicator lamp All lamps flash at the same time Attachment of the horizontal vane 0 5 second ON eoeoeoeo 0 5 second OFF POWERA E it Blinking PLASMA WASH Notlighted Abnormal no point Operation indicator lamp Both lamps flash MXZ type w OOOOO OOOOO Lo Operation setting _ f N 2 5 second OFF POWER C B Lighted T Blinking PLASMA WASH E O AREA OOL RO Abnormal No Operation indicator lamp PLASMA WASH lamp flashes 2 time flash V V os N eoeo Symptom Detection method Indoor unit and outdoor unit do not operate When it cannot properly read data in the nonvolatile memory of the indoor electronic control P C board Vi Fla
21. the outdoor electronic control P C board When the indoor coil or the room temperature thermistor is short or open circuit When the rotational frequency feedback signal is not emit during the indoor fan operation When it consecutively occurs 3 times that the compressor stops for overcurrent protection or start up failure protection witth in 1 minute after start up When the outdoor thermistors short or open circuit during the compressor operation When it cannot properly read data in the nonvolatile memory of the inverter P C board or the outdoor electronic control P C board An abnormality other than above mentioned is deteced Check point e Refer to 9 6 0 How to check mis wiring and serial signal error Check the blinking pattern of the LED on the inverter P C board or the outdoor lectronic control P C board Refer to 9 7 the characteristics of indoor coil thermistor and the room temperature thermistor Refer to 9 7 Check of indoor fan motor Refer to Check of inverter compressor Refer to service manual OB372 or OB377 Check the stop valve Refer to Check of outdoor thermistor Refer to service manual OB372 or OB377 Replace the inverter P C board or the outdoor electronic control P C board Refer to service manual OB372 or OB377 Confirm the abnormarity in detail using the failure mode recall function NOTE When the indoor unit has started operation and
22. time The power failure mode for PLASMA AIR PURIFYING power is memorized when the failure mode is called G Check of PLASMA AIR PURIFYING power After performing the check make sure to release the failure mode recall function High voltage approx 3 9kV is generated during PLASMA AIR PURIFYING power operation Turn ON the power supply Pay careful attention and never touch PLASMA WASH unit and the high voltage lead part red wire While the operation is being stopped does PLASMA WASH lamp flash twice Replace the indoor electronic control P C board is out of order During pressing both OPERATION SELECT button and TOO COOL button on the remote controller at the same time press RESET button 2 First release RESET button And release the other two buttons since all LCD in operation display section of the remote controller is displayed after 3 seconds Failure mode recall function is set Press OPERATE STOP ON OFF button After a short beep sound is emitted press twice PLASMA button PLASMA AIR PURIFYING operation is selected Make sure that the front panel is firmly closed During pressing both OPERATION SELECT button and TOO COOL button on the remote controller at the same time press RESET button 2 First release RESET button And release the other two buttons since all LCD in operation display section of the remote controller is displayed after 3 seconds F
23. 0 seconds have passed after the indoor unit was operated with the remote controller f main power is turned OFF or a power failure occurs while AUTO START STOP timer is active the timer setting is cancelled f the unit has been off with the remote controller before power failure the auto restart function does not works as the power button of the remote controller is off To prevent breaker off due to the rush of starting current systematize other home appliance not to turn on at the same time When some air conditioners are connected to the same supply system if they are operated before power failure the starting current of all the compressors may flow simultaneously at restart Therefore the special counter measures are required to prevent the main voltage drop or the rush of the starting current by adding to the system that allows the units to start one by one 8 4 Remote controller Be sure to set the slide switch inside the remote controller to an appropriate position in accordance with the installed position of the indoor unit If the switch is not set correctly the air conditioner may not function properly D 25 Position of L C R L C R L C R the slide Cah side mr J C J _ 2 lt AZ Display on __ S D 2 Where is the indoor unit installed in your room Installed at left if the Installed at right if the distance is
24. AIR PURIFYING power is activated While PLASMA WASH lamp stays OFF and it means normal Flashing PLASMA WASH lamp means abnormal and the plasma power is not being conducted Follow Check of PLASMA DEODORIZING power or Check of PLASMA AIR PURIFYING power Continuously flashes to identify the error Refer to 9 6 or 2 time flash PLASMA DEODORIZING power or PLASMA AIR PURIFYING power control circuit on the indoor electronic control P C board is out of order Refer to 9 6 or NOTE Perform the above mentioned check with the front panel closed Panel open is detected by the SAFETY DEVICE PLASMA UNIT 15 4 Indoor unit failure mode table NOTE Blinking patterns of this mode differs from the ones of Troubleshooting check table 9 4 Abnormal point Detection method Check point Failure mode Low ll o POWER lamp Not lighted 1 time flash every 0 5 second 2 time flash 2 5 second OFF 3 time flash 2 5 second OFF 11 time flash 2 5 second OFF 12 time flash 2 5 second OFF 5 PLASMA DEODORIZING PLASMA AIR PURIFYING power failure mode table POWER lamp 1 time flash 2 time flash 3 time flash 4 time flash 5 time flash Room temperature thermistor Indoor coil thermistor Serial signal error Indoor fan motor Indoor control system Abnormal point Failure mode PLASMA DEODORIZING PLASMA AIR PURIFYING power control Spark discharge Abnormal electric discharge error 1
25. Changes for the Better MITSUBISHI ELECTRIC SPLIT TYPE HEAT PUMP AIR CONDITIONERS No OB371 Wireless type Models MSZ FA25VA w MSZ FA35VA w CONTENTS 1 TECHNICAL CHANGES 2 2 PART NAMES AND FUNCTIONS 3 3 5 4 NOISE CRITERIA CURVES 6 5 OUTLINES AND DIMENSIONS 7 Indication of model name 6 WIRING DIAGRAN 8 MSZ FA25VA J Ai 7 REFRIGERANT SYSTEM DIAGRAM 8 MSZ FA35VA 8 SERVICE FUNCTIONS 9 9 TROUBLESHOOTING 11 10 DISASSEMBLY INSTRUCTIONS 31 11 PARTS 35 12 OPTIONAL PARTS 38 NOTE This service manual describes technical data of the indoor units for outdoor units MUZ FA25VA Et MUZ FA35VA Et MUZ FA25VAH IE1 and MUZ FAS35VAH Et refer to service manual OB372 for outdoor units MXZ 3ABAVA E MXZ 4A71VA Et and MXZ 4A80VA E1 refer to service manual OB377 4 TECHNICAL CHANGES MSZ A09YV E MSZ FA25VA E MSZ A12YV gt MSZ FA35VA En Indication of capacity has been changed BTU base kW base Controller method between indoor and outdoor has been changed Power supply method has been c
26. M TEMPERATURE THERMISTOR RT E02 913 307 INDOOR COIL THERMISTOR 1 E02 914 307 INDOOR COIL THERMISTOR RTI RTS 10 1 E02 913 782 SWTCHHOLDER 1 1 E02 897 300 INDOORFANMOTOR 2 MF 1 1 RcjJo D 23 E02 897 333 MOTORBAND J 1 1 24 E02 898 303 FRONT PANEL DRIVING MOTOR 1 1 25 E02 897 302 LINEFLOWFAN J 1 1 26 E02 913 775 PLASMAELEMENTHOLDER 1 1 27 E02 913 776 PLASMAUNITCOVER 1 1 28 E02 913 777 PLASMA ELECTRICALBOX 1 1 29 E02 897 440 PLASMA POWER P C BOARD 2 2 30 E02 898 316 SAFETY DEVICE PLASMA 31 E02 913 774 PLASMA AIR PURIFYING FILTER UNIT PLASMA A 1 32 E02 914 774 PLASMA DEODORIZING FILTER UNIT PLASMA D 1 1 x1 Including SW P C BOARD and POWER MONITOR RECEIVER P C BOARD x2 Including FAN MOTOR RUBBER MOUNT 2 PCS SET 11 4 INDOOR UNIT HEAT EXCHANGER E02 913 620 INDOOR HEAT EXCHANGER E02 914 620 INDOOR HEAT EXCHANGER a 35 02 815 666 UNION GAS 99 52 E02 151 667 UNION LIQUID 1 1 4e35 37 12 OPTIONAL PARTS DEODORIZING CERAMIC FILTER Replacement of the deodorizing ceramic filter about once every 6 years Deodorizing ceramic filter is installed inside PLASMA DEODORIZING filter unit The filter is fragile Handle it
27. ORIZING or PLASMA AIR PURIFYING falls significantly 0 4V 0 5ms When the voltage between CN1 GND on the PLASMA POWER P C board PLASMA DEODORIZING or PLASMA AIR PURIFYING rises above the normal voltage value 3V Replace the indoor electronic control P C board Refer to 9 6 Check of PLASMA DEODORIZING power or 9 6 Check of PLASMA AIR PURIFYING power Refer to 9 6 Check of PLASMA DEODORIZING power or 9 6 Check of PLASMA AIR PURIFYING power Refer to 9 6 Check of PLASMA DEODORIZING power or 9 6 Check of PLASMA AIR PURIFYING power Refer to 9 6 Check of PLASMA DEODORIZING power or 9 6 Check of PLASMA AIR PURIFYING power As soon as an error is detected PLASMA DEODORIZING power or PLASMA AIR PURIFYING power goes OFF therefore measuring instrument which records the voltage wave is required in order to perform the above men tioned voltage measurement 16 9 3 Instruction of troubleshooting Indoor unit operates Outdoor unit doesn t operate Outdoor unit operates in only Test Run operation x doesn t operate even in Test Run operation Check room Refer to temperature thermistor Refer to 9 7 inverter Outdoor unit How to check Indoor unit operates Outdoor unit doesn t operate normally Unit doesn t operate normal operation in COOL or HEAT mode Refer to R V coil
28. ROCEDURE PHOTOS 1 Removing the panel Photo 1 1 Press and unlock the knobs on both sides of the front panel and lift the front panel until it is level and then pull the hinges forward to remove the front panel 2 Remove the horizontal vane 3 Remove the screw caps of the panel Remove the screws See Photo 1 4 Remove the screw of the front panel driving motor See Photo 2 5 Hold the lower part of both ends on the panel and pull it slightly toward you and then remove the panel by pushing it upward Front panel Screws of the panel Horizontal vane Photo 2 Screw of the front panel driving motor OPERATING PROCEDURE PHOTOS 2 Removing the electronic control P C board the Photo 3 power monitor receiver P C board i see Sensor SW P C board and the terminal block 1 Remove the horizontal vane the panel Refer to 1 and the corner box 2 Remove the screw of the V A clamp and then the indoor outdoor connecting wire See Photo 3 3 Remove the switch holder from the electrical cover See Photo 4 Screws of 4 Remove the screw of the electrical cover and then the the terminal electrical cover See Photo 4 block cover 5 Remove the ground wire connected to the indoor electronic control P C board from the electrical box See Photo 5 6 Unhook the power monitor receiver P C board holder from the catch See Photo 5 7 Open the rear cover of the power monitor rec
29. ailure mode recall function mentioned above Press EMERGENCY OPERATION switch so that the memorized abnormal condition is deleted S Release the failure mode recall function according to Releasing the failure mode recall function mentioned above Release the failure mode recall function according to the left mentioned procedure Note1 Make sure to release the failure mode recall function once it s 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 outdoor unit is abnormal Blinking at 0 5 Blinking at 0 5 2 5 second OFF second interval 2 5 OFF second interval lt 01 fa narsa mm OFF x lt gt gt Beeps Beeps Beeps Repeated cycle Repeated cycle i Repeated cycle 3 PLASMA DEODORIZING PLASMA AIR PURIFYING power operation check PLASMA DEODORIZING PLASMA AIR PURIFYING power goes ON when PLASMA button on the remote controller is pressed once while the indoor error indication is being checked or after one short beep sound signal reception beep is emitted PLASMA button is pressed the power of plasma is changed in sequence PLASMA DEODORIZING power goes ON 444 gt PLASMA AIR PURIFYING power goes ON 4 gt gt Cancel Check the operation display section of the remote controller to confirm that PLASMA DEODORIZING power or PLASMA
30. ailure mode recall function is set Press OPERATE STOP ON OFF button After a short beep sound is emitted press twice PLASMA button PLASMA AIR selected I I operation The plasma power operation check mode is set Refer to 9 2 5 Stays OFF PLASMA AIR PURIFYING power supply is normal The front panel is not firmly closed therefore the protection by the interlock switch is active Does PLASMA WASH lamp stay OFF or continuously flash 1 Turn PLASMA AIR PURIFYING power OFF and ON again For turning off PLASMA AIR PURIFYING power refer to 9 2 3 Continuously flashes If it goes normal without turning OFF and ON PLASMA WASH lamp doesn t go OFF If the plasma unit is dirty clean the unit Remove the plasma unit firmly close the front panel and then perform PLASMA AIR EA make sure to attach the unit when it is PURIFYING power operation check X1 MA If the air conditioner goes ON with the plasma unit Does PERS Wor lamp tay OFE 0r being wet protection gets active PLASMA WASH continuously flash lamp continuously flashes Stays OFF Continuously flashes Turn OFF the power supply and check the SAFETY DEVICE PLASMA UNIT Is it firmly fixed Firmly fix the SAFETY DEVICE Yes Turn ON and OFF the SAFETY DEVICE PLASMA UNIT using something like a screw driver and measure the resistance value between CN1T2 and on the indoor electro
31. all the unit away from lights Attach filter on receiving part Replace the indoor electronic control P C board 22 The unit does not operate with the remote controller Also POWER lamp does not light up by pressing EMERGENCY OPERATION switch CO Check of indoor electronic control P C board and indoor fan motor Turn OFF the power supply Remove indoor fan motor connector CN211 vane motor connector CN151 front panel driving motor connector connector CN1U1 and i see Sensor motor connector CN110 from the indoor electronic control P C board and turn ON the power supply Measure the resistance of the front panel driving motor coil Normal value is approx 1000 Measure the resistance of i see Sensor motor coil Normal value is approx 3000 Does the unit operate with the remote controller Does POWER lamp light up by pressing EMERGENCY OPERATION switch Measure the resistance between CN211 and of the indoor fan motor connector Normal value is approx 30 to 50kQ Measure the resistance of the horizontal vane motor coil and the vertical vane motor coil Normal value is approx 3000 or 2500 Replace the varistor NR11 and fuse F11 Are the varistor NR11 burnt No and the fuse F11 blown Turn OFF the power supply Check both parts side and pattern side of the indoor electronic control P C board visually Be sure to check both the fuse and the varistor in any case
32. ce set time can be shortened by short circuit of JPG and JPS the electronic control P C board The time will be shortened as follows Refer to 9 7 Set time 1 minute 1 second Set time 38 minute 3 second It takes minutes for the compressor to start operation However the starting time is shortened by short circuit of JPG and JPS 8 2 P C BOARD MODIFICATION FOR INDIVIDUAL OPERATION A maximum of 4 indoor units with wireless remote controllers can be used in a room In this case to operate each indoor unit individually by each remote controller P C boards of remote controller must be modified according to the number of the indoor unit How to modify the remote controller P C board Remove batteries before modification The board has a print as shown below Remote controller model KM05A NOTE For remodelling take out the batteries and press the OPERATE STOP ON OFF button twice or 3 times at first After finish remodelling put back the batteries then press the RESET button J1 J2 The P C board has the print J1 and J2 Solder 1 and J2 according to the number of indoor unit as shown in Table 1 After modification press the RESET button Table 1 BS 1 unit operation 2 units operation 3 units operation 4 units operation No modification Same as at left Same as at left Same as at left 2 OOO Same as at left Same as at left Nosunit Soler Same as at le
33. e the abnormal condition which has occurred once Even though LED indication listed on the troubleshooting check table disappears the memorized failure details can be recalled This mode is very useful when the unit needs to be repaired for the abnormality which doesn t recur 1 Flow chart of the indoor outdoor unit failure mode recall function Operational procedure The cause of abnormality cannot be found because the abnormality doesn t recur 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 And release the other two buttons since all LCD in operation display section of the remote controller is displayed after 3 seconds Setting up the failure mode recall function Turn ON the power supply While pressing both OPERATION SELECT button and TOO COOL button on the remote controller at the same time press RESET button Q First release RESET button And release the other two buttons since all LCD in operation display section of the remote controller is displayed after 3 seconds ae MITSUBISHI ELECTRIC X1 Regardless of normal or abnormal a short beep is emitted once as the signal is received X1 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 TOO COOL or TOO WARM button to adjust the set
34. eiver P C board holder and pull out the power monitor receiver P C board 8 Remove the screws of the i see Sensor cover and the i see Sensor motor and then the i see Sensor motor Photo 4 9 Open the i see Sensor holder and pull out the i see Sensor 10 Open the switch holder and pull out SW P C board 11 Pull the electronic control P C board slightly toward you from the electrical box and disconnect and all the connectors on the electronic control P C board LD101 and LD105 are direct mounted to the electronic control P C board zT i 12 Pull out the electronic control P C board from the electrical Switch holder box 13 Remove the ground wire connected to the heat exchanger vw from the electrical box See Photo 5 Mud sini k s Screw of the 14 Unhook the catches of the electrical box and pull out the P electrical cover electrical box k 15 Remove the screws of the terminal block cover and then the terminal block cover and the terminal block holder See Photo 3 16 Remove the terminal block by sliding it Drain hose Screw of the V A clamp Photo 5 Ground wires Fan motor connector CN211 Removing the electrical box N I Connector of the 1 Remove the horizontal vane the panel Refer to 1 and the Aap NIRI corner box 2 Remove the Screw of the V A clamp and then the indoor 2M outdoor connecting wire See Photo 3
35. emove PLASMA DEODORIZING AIR PURIFYING filter its Fi 2 units See Figure 2 Figure 2 EUR XN J EE lt Install gt Install PLASMA DEODORIZING AIR PURIFYING filter units by following the removal procedure in reverse 1 Insert the top of PLASMA DEODORIZING AIR PURIFYING filter units into the aperture in the plasma element holder See Figure 3 2 Push in PLASMA DEODORIZING AIR PURIFYING filter units JR until they click into place The front panel does not close if PLASMA DEODORIZING AIR PURIFYING filter units are not installed properly 3 Install the anti mold air filter 4 Connect the power supply plug and or turn ON the breaker b Press WASH reset switch A short beep is heard and the blinks of PLASMA WASH lamp will be cancelled Make sure PLASMA WASH lamp is not blinking at the start of operation next time See Figure 4 6 Hold both sides of the front panel and close the front panel Figure 4 7 Press the 3 positions on the front panel as indicated by the arrows See Figure 5 Figure 3 Plasma element holder NOTE Install PLASMA DEODORIZING AIR PURIFYING filter units only when they are completely dry If the filter unit remains wet PLASMA WASH lamp may blink and the plasma function may be disab
36. fore starting service work 2 Before servicing check that the connector and terminal are connected properly 3 If the electronic control P C board is supposed to be defective check the copper foil pattern for disconnection and the components for bursting and discoloration 4 When troubleshooting refer to 9 2 9 3 and 9 4 4 How to replace batteries Weak batteries may cause the remote controller malfunction In this case replace the batteries to operate the remote controller normally Remove the front lid and insert batteries 2 Press RESET button with tip end of ball point pen Then reattach the front lid or the like and then use the remote controller Insert the negative pole of the C s x batteries first Check if the polarity RESET button of the batteries are correct NOTE 1 If RESET button is not pressed the remote controller may not operate correctly 2 This remote controller has a circuit to automatically reset the microcomputer when batteries are replaced This function is equipped to prevent the microcomputer from malfunctioning due to the voltage drop caused by the battery replacement 5 How to install the horizontal vane If horizontal vane is not installed correctly All of the operation indicator lamps will blink In this case install the horizontal vane correctly by following the procedures to NOTE Before installation of the horizontal vane turn OFF the power supply S In
37. ft P Solder both J1 and J2 How to set the remote controller exclusively for particular indoor unit After you turn the breaker ON the first remote controller that sends the signal to the indoor unit will be regarded as the remote controller for the indoor unit The indoor unit will only accepts the signal from the remote controller that has been assigned to the indoor unit once they are set The setting will be cancelled if the breaker has turned off or the power supply has shut down Please conduct the above setting once again after the power has restored 8 3 AUTO RESTART FUNCTION When the indoor unit is controlled with the remote controller the operation mode the set temperature and the fan speed are memorized by the indoor electronic control P C board The AUTO RESTART FUNCTION sets to work the moment power has restored after power failure Then the unit will restart automatically Operation If the main power has been cut the operation settings remain 2 After the power is restored the unit restarts automatically according to the memory However it takes at least 3 minutes for the compressor to start running How to release AUTO RESTART FUNCTION Turn off the main power for the unit Solder the Jumper wire to JRO7 on the indoor electronic control P C board Refer to 9 7 e S oc L IL 1L 1L CN151 CN1T2 CNIT1 CN112 NOTE The operation settings are memorized when 1
38. ft side of the heat exchanger 7 Removing the plasma power board 1 Remove the horizontal vane the panel Refer to 1 and the corner box 2 Remove the switch holder and the electrical cover Refer to 3 3 Disconnect the connector of the front panel driving motor lt CN1U1 gt from the electronic control P C board 4 Remove the front panel driving motor 5 Remove the screw of the plasma element holder and remove the plasma element holder from the heat exchanger See Photo 11 6 Unhook all the catches of plasma unit cover and remove the plasma unit cover See Photo 12 7 Remove the terminals with locking mechanism connected to the plasma power P C board and the safety device Plasma unit See Photo 13 8 Remove the plasma electrical box from the plasma element holder 9 Remove the screw fixing the plasma electrical box and open the plasma electrical box then pull out the plasma power P C board from the plasma electrical box See Photo 13 34 OPERATING PROCEDURE PHOTOS Photo 11 Front panel driving motor Screw of the plasma element holder Photo 12 Plasma unit cover Photo 13 Screw of Terminal Terminal the plasma electrical box i DW os NU E mis RU M n dd ili Wa p Safety device Plasma unit Terminal Plasma power P C board Terminal 11 PARTS LIST MSZ FA25VA E0 WH MSZ FA35VA
39. fuse Indoor coil thermistor RT12 MAIN O RT13 SUB O CN112 Plasma deodorizing air purifying filter units CN1T1 A Safety device Plasma unit CN1T2 Horizontal and Vertical vane motor CN151 SHORT oa Timer short mode point JPG JPS Front panel Refer to 8 1 driving motor CN1U1 Indoor coil thermistor RT12 MAIN RT13 SUB Room temperature thermistor RT11 40 CRE W ral FI Han _ IN VEN N m EJ p Es EN EN d Lg EN n E Y E RESET acne ass IERI REN _ l ae Resistance E i Z 0 10 20 30 40 50 60 Temperature DISASSEMBLY INSTRUCTIONS lt Terminal with locking mechanism Detaching points 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 the sleeve and Pull the terminal while pull out the terminal pushing the locking slowly lever Connector MSZ FA25VA MSZ FA35VA E7 INDOOR UNIT OPERATING P
40. hanged change to supply from outdoor unit Power supply cord has been removed Indoor electronic control P C board has been changed Position of terminal block has been changed Indoor fan motor has been changed AC gt DC Indoor heat exchanger has been changed The horizontal vane motor unit has been changed An external gear is added to the generalized stepping motor The unit is structured so that the driving torque and stopping torque would increase as eo NO EU m D Generalized stepping motor NOTE Do not remove the vane motor from the motor unit Do not disassemble the horizontal vane motor unit 10 The vertical vane motor unit has been added An external gear is added to the generalized stepping motor The unit is structured so that the driving torque and stopping torque would increase Generalized stepping motor NOTE Do not remove the vane motor from the motor unit Do not disassemble the vertical vane motor unit 11 Front panel driving motor unit which opens and closes the front panel has been added Front panel opening closing output gear NOTE Do not disassemble the front panel driving motor unit 12 PLASMA DEODORIZING AIR PURIFYING filter units have been added 13 i see Sensor has been added i see control operation and AREA setting have been added 14 Air cleaning filer has been removed 15 Signal of remote controller has been changed I
41. ional procedure There is a possibility that the plasma unit is abnormal Confirm the presence of abnormality according to the following procedures Confirm that the remote controller is in the failure mode recall function 1 Regardless of normal or abnormal a short x1 beep is emitted as the signal is received With the remote controller headed towards the indoor unit press TOO COOL or TOO WARM button to adjust the set temperature to 23 C Confirmation of abnormality presence Does POWER lamp on the indoor unit blink at the interval of 0 5 seconds 2 Blinks The plasma unit is abnormal Beep sounds are emitted at the same timing of the blinking of POWER lamp The plasma unit is abnormal Check the blinking pattern and refer to confirm the abnormal point 9 2 5 Make sure to check at least two consecutive blinking cycles 3X2 Yes Blinks The plasma unit is normal Releasing the failure mode recall function Release the failure mode recall function by the following procedures With the remote controller headed towards the indoor unit press any button that is not used in this failure mode recall function e g TIMER button OR DTurn OFF the power supply and turn ON it again Press RESET button of the remote controller Repair the defective parts Deleting the abnormal condition DAfter repairing the unit recall the failure mode again according to Setting up the f
42. led When PLASMA DEODORIZING AIR PURIFYING filter units are cleaned Figure 5 INFORMATION FOR MULTI SYSTEM AIR CONDITIONER OUTDOOR UNIT MXZ series Multi system air conditioner can connect two or more indoor units with one outdoor unit Unit won t operate in case the total capacity of indoor units exceeds the capacity of outdoor units Do not connect indoor units beyond the outdoor unit capacity Operation indicator lamp flashes as shown in the figure below When you try to operate two or more indoor units with one outdoor unit simultaneously one for the cooling and the other for heating the operation mode of the indoor unit that operates earlier is selected The other indoor units which start the operation later cannot operate indicating as shown in the figure below In this case please set all the indoor units to the same operation mode POWER AE Lighted PLASMA WASH C 2 O Notlighted When indoor units start the operation while the defrosting of outdoor unit is being done it takes a few minutes max 10 minutes to blow out the warm air the heating operation though indoor unit that does not operate may get warm or the sound of refrigerant flowing may be heard they are not malfunction The reason is that the refrigerant continuously flows into it 9 2 Failure mode recall function Outline of the function This air conditioner can memoriz
43. motor unit 5 Removing the vertical vane motor unit 1 Remove the horizontal vane the panel Refer to 1 and the corner box 2 Pull out the drain hose from the nozzle assembly and remove the nozzle assembly See Photo 5 3 Remove the crank of the vertical vane motor unit from the arm of the vertical vane See Photo 7 4 Remove the screws of the vertical vane motor unit and pull the vertical vane motor unit See Photo 7 6 Removing the indoor fan motor and the line flow fan 1 Remove the horizontal vane the panel Refer to 1 and the corner box 2 Remove the switch holder and the electrical box Refer to 3 3 Pull out the drain hose from the nozzle assembly and remove the nozzle assembly 4 Remove the screws fixing the motor bed See Photo 8 5b Loosen the screw fixing the line flow fan See Photo 9 6 Remove the motor bed together with fan motor and motor band 7 Release the hooks of the motor band and remove the motor band then pull out the indoor fan motor 8 Remove the screws fixing the left side of the heat exchanger See Photo 10 9 Lift the heat exchanger and pull out the line flow fan to the lower left Photo 9 Screw of the line flow fan Photo 6 Screw of the horizontal vane motor unit Photo 7 Crank of the vertical vane motor unit Screws of the vertical vane motor unit Photo 8 Motor band Screws of the motor bed Photo 10 Screws of the le
44. move the short circuit between outdoor terminal block S2 and S3 Is there amplitude of 10 to 20V DC between outdoor terminal block S2 and S3 Confirmation of serial signal Is there any error of the indoor outdoor connecting wire Replace the such as the damage of the wire indoor outdoor intermediate connection poor connecting contact to the terminal block Turn OFF inverter controlled lighting equipment Turn OFF the power supply and then turn ON again Press EMERGENCY OPERATION switch No Reinstall Is there any error of the either the Is there 230V AC between outdoor indoor outdoor connecting wire Replace the unit or the terminal block S1 and S2 such as the damage of the wire indoor outdoor Confirmation of power voltage Is serial signal light each error indicated other away 6 minutes later Attach a filter Yes on receiving Replace the indoor electronic control P C board section of the indoor unit recall function after checking intermediate connection poor connecting contact to the terminal block Be sure to release the failure mode Ez un As for outdoor unit MXZ type refer to service manual OB377 24 When lamps flash ON and OFF every 0 5 second Indoor unit and outdoor unit do not operate E Check of installation of the horizontal vane Turn OFF the power supply Relock the s
45. n OFF the power supply Is there rated voltage of No 230V AC in the power s the power supply pply Yes Turn ON the power supply Is there 230V AC between outdoor terminal block S1 and 2 No Check the wiring Yes Press EMERGENCY OPERATION switch Does POWER lamp light up Confirmation of the power to the indoor unit Yes Is there any mis wiring poor contact or wire disconnection of the indoor outdoor connecting wire Make them sure Serial signal error display POWER lamp blinks quickly Turn OFF the power supply Check once more if the indoor outdoor connecting wire is not mis wiring Short circuit outdoor terminal block S2 and X1 Mis wiring may damage indoor electronic control 53 P C board during the operation 3 1 Be sure to confirm the wiring is correct before the operation starts Turn ON the power supply of the outdoor unit In 3 minutes after turning ON the power supply of the outdoor unit does the LED on the inverter P C board Inverter P C board repeat quick Replace the inverter Parts side and 0 8 second ON gt P C board Be sure to check above in 3 minutes Lighting xo after turning ON After 3 minutes LED v blinks 6 times When the inverter P C 2 Be careful to the residual LED O board is normal LED also blinks 6 voltage of smoothing capacitor times after 3 minutes Re
46. nic control P C board Does the switch work Yes Keep the SAFETY DEVICE PLASMA UNIT ON using something like a screw driver Turn ON the power supply While the operation is being stopped is the voltage between CN1 and GND on the PLASMA POWER P C board PLASMA AIR PURIFYING OV Replace the SAFETY DEVICE PLASMA UNIT No 9 5V DC is generated Replace the indoor electronic control P C board Yes Set the plasma power failure mode recall function When PLASMA button is pressed is Replace the indoor electronic control P C board there voltage of 12 5V DC between 1 Check the wiring of CN1T1 on the indoor electronic control and G GND P C board Replace the PLASMA POWER P C board PLASMA AIR PURIFYING 27 Indoor unit and outdoor unit do not operate H Check of auto front panel Turn the remote controller ON Does the front panel automatically open Does it start to move Is the connector of the front panel driving motor unit or the indoor electric control P C board unplugged Is the resistance value between terminals of the front panel driving Plug in the connector and motor unit normal check from the start again Replace the front panel driving motor unit Replace the indoor electric control P C board Is the front panel held 10mm more upper than the level line of the nozzle top
47. shing of All lamps indicate abnormality Symptom Detection method Indoor unit and outdoor unit do not operate When the electricity is not conducted to the interlock switch Fan of the horizontal vane Check point Replace the indoor electronic control P C board Check point Refer to 9 6 Check of installation of the horizontal Flashing of AREA lamp both lamps indicates abnormality POWER lamp is lighted Symptom Detection method Outdoor unit operates but indoor unit does not operate When the operation mode of the each indoor unit is differently set to COOL includes DRY and HEAT at the same time the operation mode of the indoor unit that has operated at first has the priority Flashing of PLASMA WASH lamp indicates abnormality Symptom Detection method Indoor unit and outdoor unit do not operate When PLASMA DEODORIZING power or PLASMA AIR PURIFYING power can not be turned OFF Check point Unify the operation mode Refer to service manual OB377 Check point Replace the indoor electronic control P C board NOTE When the indoor unit has started operation and the above detection method has detected an abnormality the first detection after the power ON the indoor electronic control P C board turns OFF the indoor fan motor with OPERATION INDICATOR lamp flashing 19 x C O 9 5 Trouble criterion of main parts MSZ FA25VA m MSZ FA35VA Check me
48. splayed after 3 seconds Failure mode recall function is set L Press OPERATE STOP ON OFF button After a short beep sound is emitted press once PLASMA button PLASMA DEODORIZING operation is selected Make sure that the front panel is firmly closed During pressing both OPERATION SELECT button and TOO COOL button on the remote controller at the same time press RESET button 2 First release RESET button And release the other two buttons since all LCD in operation display section of the remote controller is displayed after 3 seconds Failure mode recall function is set 3 Press OPERATE STOP ON OFF button After a short sound is emitted press once PLASMA button PLASMA PLASMA DEODORIZING operation is DEODORIZING selected operation The plasma power operation check mode is set Refer to 9 2 5 Stays OFF PLASMA DEODORIZING power supply is normal The front panel is not firmly closed therefore the protection by the interlock switch is active Does PLASMA WASH lamp stay OFF or continuously flash 1 Turn PLASMA DEODORIZING power OFF and ON again For turning off PLASMA DEODORIZING power refer to 9 2 3 If it goes normal without turning OFF and ON PLASMA WASH lamp doesn t go OFF Continuously flashes If the plasma unit is dirty clean the unit After cleaning make sure to attach the unit when it is completely dry If the air conditioner goes ON with the plasma uni
49. t being wet protection gets active and PLASMA WASH lamp continuously flashes Remove the plasma unit firmly close the front panel and then perform PLASMA DEODORIZING power operation check 31 Does PLASMA WASH lamp stay OFF or continuously flash Stays OFF Continuously flashes Turn OFF the power supply and check the SAFETY DEVICE PLASMA UNIT Is it firmly fixed Firmly fix the SAFETY DEVICE Yes Turn ON and OFF the SAFETY DEVICE PLASMA UNIT using something like a screw driver and measure the resistance value between CN1T2 on the indoor electronic control P C board Does the switch work Yes Keep the SAFETY DEVICE PLASMA UNIT ON using something like a screw driver Turn ON the power supply While the operation is being stopped is the voltage between CN1 and GND on the PLASMA POWER P C board PLASMA DEODORIZING 0V Yes Replace the SAFETY DEVICE PLASMA UNIT No 9 5V DC is generated Replace the indoor electronic control P C board Set the plasma power failure mode recall function When PLASMA button is pressed is there voltage of 12 5V DC between 1 and GND No Replace the indoor electronic control P C board Check the wiring of CN1T1 on the indoor electronic control P C board Yes Replace the PLASMA POWER P C board PLASMA DEODORIZING 26 When PLASMA WASH lamp flashes 2
50. t is not available for the conventional models 16 Symbol on terminal block has been changed to 51 52 53 M INDOOR UNIT MSZ FA25VA E MSZ FA35VA PLASMA AIR PURIFYING filter Heat exchanger Anti mold air filter Line flow fan Operation section When the front panel is opened Auto front panel When the unit starts operating the front panel opens automatically to draw in air When the unit stops operating the front panel closes automatically Auto front panel WR lt Open gt lt Closed gt WASH reset switch AREA lamp indicate AREA setting In AREA setting the horizontal air flow direction changes automatically according to the detection of i see Sensor which detects the floor wall temperature to air condition the room evenly Remote control receiving section PART NAMES AND FUNCTIONS Front panel PLASMA DEODORIZING filter Remote controller Display section POWER lamp pPowER O PLASMA WASH lamp PLASMA WASH AREA lamp RO e A see Sensor i see Sensor i see control operation i see sensor constantly measure floor wall temperature to automatically to the set temperature by estimating the temperature actually perceived by a person inside the room sensible temperature 1 MSZ FA25VA MSZ FA35VA E MSZ FA25VA Ei ACCESSORIES MSZ FA35VA
51. thod and criterion Measure the resistance with a tester Part temperature 10 C 30 C thermistor RT11 Indoor coil thermistor RT12 MAIN RT13 SUB m 1 Indoor fan motor MF Check 9 6 Measure the resistance between the terminals with a tester Horizontal vane Part temperature 10 C 30 C Color of the lead wire BRN other one 235 255 Open short circuit i Measure the resistance between the terminals with a tester Vertical vane motor MV2 Part temperature 10 C 30 C Sensor Color ofthe leadwire Normal Abnormal motor MT BRN other one 2820 306 Q Open or short circuit Measure the resistance between the terminals with a tester Front panel Part temperature 10 C 30 C driving motor MP Color of the lead wire Norma Abnormal i BRN other one 940 1020 Open or short circuit OBI GaN Turn the power ON i see Sensor is energized with the aluminum block part on the i see Sensor P C board upper part of i see Sensor covered with black vinyl tape then measure the voltage between connector terminals of i see Sensor using tester Part temperature 10 40 C x The aluminum block i see Sensor part is covered with black vinyl tape Aluminum block i see Sensor RR Black vinyl tape Connector i see Sensor P C board Normal range Abnormal 1 874 3 387V DC Below
52. topper of the horizontal vane to the indoor unit Refer to 9 1 5 Is the stopper of the horizontal vane No locked to the indoor unit correctly Yes Turn ON the power supply No Are all lamp flashing To check the continuity of the interlock switch Fan measure the resistance of connector connected to CN1R1 on the indoor electronic control P C board Turn OFF the power supply No Replace the Is there resistance 0 Q interlock switch Fan Yes Replace the indoor electronic control P C board 25 When PLASMA WASH lamp flashes 2 time The power failure mode for PLASMA DEODORIZING power is memorized when the failure mode is called E Check of PLASMA DEODORIZING power After performing the check make sure to release the failure mode recall function High voltage approx 3 9kV is generated during PLASMA DEODORIZING power operation Pay careful attention and never touch PLASMA WASH unit and the high voltage lead part red wire While the operation is being stopped does PLASMA WASH lamp flash twice Replace the indoor electronic control P C board is out of order During pressing both OPERATION SELECT button and TOO COOL button on the remote controller at the same time press RESET button 2 First release RESET button And release the other two buttons since all LCD in operation display section of the remote controller is di
53. wee eee ew at 0 5 second intervals Cause Indoor Outdoor unit Mis wiring or trouble of serial signal Refer to 9 6 How to check of mis wiring and serial signal error when outdoor unit doesn t work POWER lamp POWER lamp POWER lamp Flash on and off 2 time flash Cause Indoor unit Trouble of room temp erature indoor coil thermistor Check room temperature thermistor and indoor coil thermis tor Refer to 9 7 Test point diagram and voltage Check of 3 time flash Cause Indoor unit Trouble of indoor fan motor Refer to 9 6 Check of indoor fan motor Left lamp of AREA lamp 4 time flash Cause Indoor unit Trouble of indoor unit control system Replace the indoor electronic control P C board Outdoor compressor Cause Outdoor unit Trouble of thermistor in outdoor unit power system abnormality Refer to Check of outdoor thermistors Outdoor unit 7 time flash Cause Trouble of outdoor control system Replace the inverter P C board or the outdoor electronic control P C board POWER lamp 14 time flash Cause Outdoor unit Other Outdoor unit abnormality Check Flow chart of the detailed outdoor unit failure mode 9 4 Troubleshooting check table ME Lighted POWERT X Blinking PLASMA WASH Natlighted NOTE Before taking
54. with care NOTE PLASMA DEODORIZING filter unit may not operate properly if the deodorizing ceramic filter is not installed Be sure to install the deodorizing ceramic filter 1 Release the two knobs to open the filter unit 3 Pull out the deodorizing ceramic filter from the side of 2 Pull the side knobs to outward and then the filter unit forward to remove as illustrated below Deodorizing ceramic filter SZZ ZNZ ZNZ ZNZ D SA SIS INNEN NN ZSE SESZ SSL 1 A F A A 7 TAN 7 7 7 7 7 4 Install the deodorizing ceramic filter by following the removal procedure in reverse MSZ FA25VA MSZ FA35VA E1 MAC 305FT E 38 39 s MITSUBISHI ELECTRIC CORPORATION HEAD OFFICE MITSUBISHI DENKI BLDG 2 2 3 MARUNOUCHI CHIYODA KU TOKYO100 8310 JAPAN Copyright 2005 MITSUBISHI ELECTRIC ENGINEERING CO LTD Distributed in Jan 2005 No OB371 6 New publication effective Jan 2005 Made in Japan opecifications subject to change without notice
55. y bulb temperature 27C Wet bulb temperature 19 C Heating Dry bulb temperature 20C Wet bulb temperature 15 C 80 70 O gt E o e 50 O gt o Co O cO e z o e EE dc ae 20 APPROXIMATE E THRESHOLD OF E N 4 HEARING FOR N 20 CONTINUOUS NOISE 10 63 125 250 500 1000 2000 4000 8000 BAND CENTER FREQUENCIES Hz INDOORUNIT WALL 1m 0 8m MICROPHONE 5 OUTLINES AND DIMENSIONS MSZ FA25VA E7 Unit mm MSZ FA35VA INDOOR UNIT 11 26 Oblong hole 11 20 Oblong hole m 55 225 225 55 x Installation plate t au PER Y ANO 1 155__ 155 o g 55 335 320 70 8 Indoor unit ir i Wall hole 65 2 Installation plate Liquid line 6 35 0 5m z Gas line 9 52 0 43m Insulation 35 O D 9 19 1 0 a Drain hose 16 e Connected part O D 90 53 5 624 5 102 2 Insulation 228 106 58 19 Air out m Required space Indoor unit Wireless remote controller 75 or more 75 or more 10 O _ G Ed O o Oo UE ces n 5 oc 5 o 113 6 WIRING DIAGRAM MSZ FA25VA MSZ FA35VA INDOOR UNIT m MODELS WIRING DIAGRAM INDOOR ELECTRONIC TB m CONTROL P C BOARD aHa 29 51 BLK Me eol TOOUTDOOR a 9

Mitsubishi Electronics MSZ-FA35VA User's Manual

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