service manual msz-sf25ve - e1 , e2 , en1 , en2 , er2 msz-sf35ve
Contents
1. FAN SPEED FUNCTION SPL dB A LINE FAN SPEED FUNCTION SPL dB A LINE COOLING 42 o_o COOLING 42 oe Super High Super High HEATING 45 o _O HEATING 46 OO 90 I I T 90 7 I 1 1 x f T 1 x 1 i 1 J m E a q ES q I I I a 4 i amp 80 E 80 1 1 1 1 I F I 3 i E I i z i i E S Poi o m i F F ine 70 4 i 1 NC 70 D E i I 1 m 9 60 m s 60 m m i sel E F 4 i T 2 F i 50 F w 50 4 x i F al tr FP I q P i E NC 50 1 NC 50 2 gt 2 5 m H Loi m x L a 40 E YS KL a 40 E Q T E NC 40 Q L 1 ES NC 40 z on q 1 2 i T 2 j i y 30 30 N i a t I E TNC 30 a r NS x 1 NC 30 z 3 1 z L E P E m m 1 1 u 20 u 20 4 4 amp E i NC 20 amp i 1 NC 20 5 HNC 10 10 4 9 qo F i ad 1 T 63 125 250 500 1000 2000 4000 8000 63 125 250 500 1000 2000 4000 8000 BAND CENTER FREQUENCIES Hz BAND CENTER FREQUENCIES Hz FAN SPEED FUNCTION SPL dB A LINE FAN SPEED FUNCTION SPL dB A LINE COOLING 42 e COOLING2. NOTE 2 FOR MULTI SYSTEM AIR CONDITIONER OUTDOOR UNIT MXZ series Multi system air conditioner can connect two or more indoor units with one outdoor unit When you try to operate two or more indoor units with one outdoor unit simultaneously one for the cooling and the others for heating the operation mode of the indoor unit that operates first is selected Other indoor units cannot operate and operation indicator lamp flashes as shown in the figure below In this case please set all the indoor units to the same operation mode OPERATION INDICATOR Lighted Or Blinking O Not lighted When indoor unit starts 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 In the heating operation though indoor unit that does not operate may get warm or the sound of refrigerant flow ing may be heard they are not malfunction The reason is that the refrigerant continuously flows into it 9 6 AUTO VANE OPERATION 1 Horizontal vane 1 Vane motor drive These models are equipped with a stepping motor for the horizontal vane The rotating direction speed and angle of the motor are controlled by pulse signals approximately 12 V transmitted from indoor microprocessor 2 The horizontal vane angle and mode change as follows by pressing VANE CONTROL button AUTO Q 179 5 241 3 1 4 1 5 SWING Z 3 Positioning To confirm the standard position
3. 2 SO is 27 ioo 4 B of pgo FER G bes H E 6 og w a RABIPI gee of FL FROZE ooh D o o 3 RATRA2JP RAP wel ojojojojojojz 412131332 3 olololol olo ee e A Set en Room temperature ther mistor RT11 CN111 RT12 RT13 CN112 Timer short mode point To disable Auto restart function JPG JPS Refer to 8 1 cut the Jumper wire to JR77 Refer to 8 3 Switch board 55 Emergency operation switch E O SW SW1 OBH600C 31 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 18 Pull the terminal while pull out the terminal pushing the locking slowly lever Connector MSZ SF25VE MSZ SF35VE MSZ SF42VE MSZ SF50VE NOTE Turn OFF power supply before disassembly OPERATING PROCEDURE PHOTOS 1 Removing the panel 1 Remove the horizontal vanes
4. Front panel Horizontal vanes Removal procedure Unlock the upper and lower vanes as shown in using a thin instrument Then remove the horizontal vanes in the direction of Screws of the panel Upper and lower vanes 2 Remove the screw caps of the panel Remove the screws of the panel 3 Unhook the lower part of the panel 4 Pull the panel slightly toward you and then remove the panel by pushing it upward OBH600C 32 OPERATING PROCEDURE PHOTOS 2 Remove the indoor electrical box 1 Remove the panel Refer to 1 and the corner box right 2 Remove the screw of the V A clamp Remove the V A clamp and the indoor outdoor connecting wire 3 Remove the earth wire connected to the indoor heat exchanger from the electrical box 4 Remove the screw of the electrical cover and remove the electrical cover 5 Disconnect following connectors lt Indoor electronic control P C board gt CN151 Vane motor CN112 Indoor coil thermistor lt Indoor power P C board gt CN211 Indoor fan motor 6 Unhook the catch of the display P C board holder from the nozzle 7 Remove the screw fixing the electrical box then the upper catch of the electrical box and pull out the elec trical box When installing the electrical box pass the lead wire from the fan motor through B so that it will not be pinched under the electrical box Removing the indoor power P C board
5. No lt Y A Y X1 Miswiring may damage indoor electronic control P C board during the operation Turn OFF the power supply Bridge the outdoor terminal block S2 and S3 1 B Check once more if the indoor outdoor connecting wire is not miswiring Remove the indoor outdoor connecting wire from outdoor terminal block S3 Be sure to confirm the wiring is correct before the opera tion starts X3 Be sure to check this within 3 minutes after turning ON After 3 minutes LED blinks 6 times Even when the inverter P C board or the outdoor electronic control P C Y Turn ON the power supply Y board is normal LED blinks 6 times after 3 minutes Except for outdoor unit of multi system type Is the bus bar voltage of the inverter P C board or the outdoor electronic control P C board normal Refer to TEST POINT DIAGRAM AND VOLTAGE of the outdoor unit No Check of power supply Yes Y Does the LED on the inverter P C board or the outdoor electronic control P C board repeat 3 6 second OFF and 0 8 second ON quick blinking x3 Yes Y Turn OFF the power supply Remove the bridge between outdoor terminal block S2 and S3 Turn ON the power supply Connect the indoor outdoor connecting wire to outdoor terminal block S3 Replace the inverter P board or the outdoor No electronic control P C Lighted or not
6. Air direction 5 Super High High Med Low Silent Super High High Med Low Silent Super High High Med Low Silent Super High High Special remarks Sound level Med Low Silent Super High High Med Low Silent Super High Fan speed High Med Low Silent Fan speed regulator Remote controller model NOTE Test conditions are based on ISO 5151 Cooling Indoor Dry bulb temperature 27 Wet bulb temperature 19 C Outdoor Dry bulb temperature 35 C Heating Indoor Dry bulb temperature 20 C Wet bulb temperature 15 Outdoor Dry bulb temperature 7 C Wet bulb temperature 6 C 1 Measured under rated operating frequency Specifications and rated conditions of main electric parts Fuse T3 15AL250V Horizontal vane motor 12 VDC Varistor S10K300E2K1 ERZV10D471 Terminal block 3P OBH600C 5 4 NOISE CRITERIA CURVES
7. Cause Cause Cause Cause Cause Cause or more ond intervals Indoor unit Indoor unit Indoor unit Outdoor unit Outdoor unit Outdoor unit Cause Cause Trouble Trouble of Trouble Outdoor e Trouble of Trouble of Outdoor unit Indoor Outdoor of room indoor fan of indoor power thermistor in outdoor Other ab unit temperature motor unit control system outdoor unit trol system normality Miswiring or indoor coil system abnormality trouble of thermistor serial signal Refer to 10 6 5 How to check mis wiring and serial signal error Check room temperature thermistor and indoor coil thermis tor Refer to 10 7 Test point diagram and voltage OBH600C Refer to 10 6 Check of indoor fan motor Replace the indoor elec tronic control P C board 22 Refer to Check of outdoor ther mistors Replace the inverter P C board or the outdoor electronic control P C board Check Flow chart of the detailed outdoor unit failure mode recall func tion 10 4 TROUBLESHOOTING CHECK TABLE Before taking measures make sure that the symptom reappears for accurate troubleshooting When the indoor unit has started operation and detected an abnormality of the following condition the first detection after the power ON the indoor fan motor turns OFF and OPERATION INDICATOR lamp flashes OPERATION INDICATOR ito Abnormal poi
8. NOTES 1 About the outdoor side electric wiring 10105 e3 z lol DHOM 010000 refer to the outdoor unit electric wiring RECEIVER E aite NS ON diagram for servicing BOARD i 3 LD105 5 2 Use copper conductors only SWITCH BOARD For field wiring 3 Symbols indicate Terminal block 0000 Connector MSZ SF35VE MSZ SF50VE ite SYMBOL NAME FUSE FIL T3 15AL250V TB MF FAN MOTOR nipa apes VANE MOTOR 230V _ go NT MV HORIZONTAL x5 EGER IENE Foal RED NR11 VARISTOR UNIT 37 ME 8111 RESISTOR 5 Blk ari ROOM TEMP O VU INDOOR POWER MR BOARD LD106 RTI ruERMISTOR MAIN L 5 RTI3 THERMISTOR SUB 1 1011005 e o AU SEEN Nox T111 TRANSFORMER DISPLAY pA INDOOR ELECTRONIC n BOARD 1 CONTROL P BOARD TB TERMINAL BLOCK oe ty l l 9 EUG au LD105 M a RET Tio o e NOTES 1 d ne tdoor Side electronic wiring LD120 S 0110 LD120 M refer to the outdoor unit electronic wiring RECEIVER INE LL ON Leno eL ERE or servicing BOARD 3 3 B 2 Use ett conductors only i For field wiring 3 Symbols indicate OO Terminal block Connector OBH600C 7 REFRIGERANT SYSTEM DIAGRAM MSZ SF25VE MSZ SF3
9. the vane moves until it touches the vane stopper Then the vane is set to the selected angle Confirming of standard position is performed in the following cases a When the operation starts or finishes including timer operation b When the test run starts c When standby mode only during multi system operation starts or finishes 4 VANE AUTO mode In VANE AUTO mode the microprocessor automatically determines the vane angle to make the optimum room tem perature distribution Sz e CX In COOL and DRY operation In HEAT operation Vane angle is fixed to Horizontal position Vane angle is fixed to Angle 4 Horizontal position 4 5 STOP operation OFF and ON TIMER standby In the following cases the horizontal vane returns to the closed position a When OPERATE STOP ON OFF button is pressed POWER OFF b When the operation is stopped by the emergency operation c When ON TIMER is ON standby 6 Dew prevention During COOL or DRY operation with the vane angle at Angle 4 or 5 when the compressor cumulative operation time exceeds 1 hour the vane angle automatically changes to Angle 1 for dew prevention 7 SWING S mode By selecting SWING mode with VANE CONTROL button the horizontal vanes swing vertically When COOL DRY or FAN mode is selected only the upper vane swings 8 Cold air prevention in HEAT operation The horizontal vane position is set to Upward NOTE When 2 or more indoor units are operated w
10. 45 o_o Super High Super High HEATING 47 o O HEATING 49 o o 90 T I 7 90 T I nm 7 c r I x E q lt i F T ti i Se T Eo lt i i F i i E i F F t I x L c 80 9 9 E pE i z L I z Rie o r i e E SE e E S 70 8 70 P e E E I ANC ae a r m F ee 28 s 60 i s 60 E I r NC 60 u as gt L ir pesce u F 8 ij w 50 s i ies DIU T fees 2 E 50 E 40 40 NC 40 a F z 3 z T E o 30 o 30 a NC 30 a i 20 F L 20 5 HNC 10 Ne 20 5 NC 10 L 9 qo I x 10 I T 63 125 250 500 1000 2000 4000 8000 63 125 250 500 1000 2000 4000 8000 BAND CENTER FREQUENCIES Hz BAND CENTER FREQUENCIES Hz Test conditions INDOOR UNIT Cooling Dry bulb temperature 27 C WALL Wet bulb temperature 19 C 1m Heating Dry bulb temperature 20 C Wet bulb temperature 15 C 0 8m MICROPHONE OBH600C 6 9 OUTLINES AND DIMENSIONS MSZ SF25VE MSZ SF35VE MSZ SF42VE MSZ SF50VE Unit mm 11x26 Oblong ho 11x20 Oblong hole Installation plate 87 5 y F 225 225 1 87 5 N 7 x NE me wv o j to o S N 8 s SN Q QN SEN D MS XL s e Indoor unit 67 5 331 5 V 309 5 89 5 Wall hole 65 J Installation plate gt nen 7 10 Drain hos
11. No seconds between indoor terminal block S2 and S3 yee Does the indoor OPERATION INDICATOR lamp left blink continuously 6 minutes after the emergency operation starts No Yes Y Does the outdoor LED blink 6 times No Yes Y between indoor terminal block S2 Does DC 6V or more occur and S3 Turn the main power supply OFF Replace the indoor power P C board Y Turn the main power supply ON Y Start the emergency operation Y Does the indoor OPERATION INDICATOR lamp left blink continuously 6 minutes after the emergency operation starts No ye Does DC 20V or more occur between indoor terminal block S2 and S3 No Y Yes Replace the indoor electronic control P C board OBH600C No Does the outdoor LED light up Y Yes Confirm that the thermostat is OFF and wiring is not loose LI Y Turn the main power supply OFF Turn the main power supply ON Wait for 2 or more minutes after the main power sup ply is turned ON Touch CN202 and JPG with tester probes and start the emergency operation Y Replace the outdoor inverter P C board 1 During the emergency operation does DC 2V or more occur for 2 No seconds between CN202 and JPG on the indoor electronic control Replace the outdoor inverter P C
12. VANE MOTOR ro ourooor EE es neo oh U i MV HORIZONTAL UNIT NRI VARISTOR x O INDOOR POWER TI THERMISTOR COIL TEMP _ BOARD RT12 rHeRMISTOR MAIN y B COIL TEMP re 10 O RTIS THERMISTOR SUB i 1011015 Se T111 TRANSFORMER DISPLAY TF tS INDOOR ELECTRONIC BOARD CONTROL BOARD TERMINAL BLOCK s 2 MV TUR Te ou LD105 M e T RELAY AEDEM to NOTES 1 About the outdoor side electric wiring 012005 e mA iJo DOW refer to the outdoor unit electric wiring RECEIVER I amu y MPO EE diagram for servicing BOARD j 9 3 110105 5 Q Use copper conductors only SWITCH BOARD For field wiring Symbols indicate CO Terminal block 6900 Connector MSZ SF25VE MSZ SF42VE SYMBOL NAME s A s Fil T3 15AL250W TB N201 pi Lib CN211 Lilt REACTOR f BK ote ages aoe RED 2907 eo IL il gle NRI Lit o m MF FAN MOTOR I VANE MOTOR TO OUTDOOR ie TEN c3 Red z MV HORIZONTAL UNIT I BLU MF NRI VARISTOR Sary du ROOM TEMP C02 INDOOR POWER ST ee _ PG BOARD 10106 RTI THERMISTOR MAIN ETE 3 kie ss ES Ts 1005 e oui LENDI O Till TRANSFORMER MV DISPLAY ta dm INDOOR EL E TRONIC BOARD 15 CONTROL BOARD O TB TERMINAL BLOCK INE 2 MV Lopate CN112 LD105 M e x RELAY Monica NOTES 1 Abo
13. X2 Be careful of the residual voltage of smoothing lighted capacitor Check the wiring If there are any error of the indoor outdoor connecting wire such as the damage of the wire intermediate connection and or poor contact to the terminal block replace the indoor outdoor connecting wire Y Is there rated voltage between indoor terminal block S1 and S2 lt Confirmation of power voltage gt No Yes Is there amplitude of 10 to 20 VDC between indoor terminal block S2 and S3 lt Confirmation of serial signal gt No Yes Y Turn OFF inverter controlled lighting equipment Turn OFF the power supply and then turn ON again Press EMERGENCY OPERATION switch Reinstall either the unit or the light away from each other Attach a filter on remote control receiv ing section Is serial signal error indicated 6 minutes later of the indoor unit Is there 2 VDC or less between CN102 and JPG GNDY on the indoor electronic control P C board OBH600C Yes nd Is there 2 VDC or less ONC o CN102 and JPG GND the indoor electronic ne board Is there 2 VDC or less between 1029 and JPG GND on the indoor electronic control P C Yes board i Replace the indoor power P C board Replace the indoor elec tronic control P C board No 29 E Ele
14. before the shutoff of the main power Operation If the main power has been cut the operation settings remain 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 disable AUTO RESTART FUNCTION Turn off the main power for the unit Cut the jumper wire to JR77 on the indoor electronic control P C board Refer to 10 7 Indoor electronic control P C board JR77 NOTE The operation settings are memorized when 10 seconds have passed after the indoor unit was operated with the remote controller If main power is turned OFF or a power failure occurs while AUTO START STOP timer is active the timer setting is can celled f the unit has been off with the remote controller before power failure the auto restart function does not work 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
15. board 1 Electric charge may remain immediately after the main power supply is turned OFF Perform the procedure after 3 minutes P C board Y Yes Replace the Replace the indoor power indoor electronic board control P C board A Turn OFF inverter controlled lighting equipment Turn OFF the power supply and then turn ON again Repair completed Press EMERGENCY OPERATION switch inverter P C board 1 Y Is serial signal error indicated 6 Replace the outdoor minutes later Reinstall either the unit or the light away from each other Attach a filter on remote control receiving section of the indoor unit Yes 28 MXZ Type Turn OFF the power supply D Y Is there rated voltage in the power supply Y Yes Turn ON the power supply Y No Check the power supply Is there rated voltage between outdoor terminal block S1 and S2 NG Check the wiring yres Press EMERGENCY OPERATION switch once lamp light up lt Confirmation of the power to Y the left lamp of OPERATION INDICATO the indoor unit gt Yes Y Is serial signal error indicated 6 minutes later Yes No Is there any miswiring poor contact or wire disconnection of the No 5 indoor outdoor connect ing wire Yes Correct them
16. in the nonvolatile memory of the inverter P C board or the out door electronic control P C board Check the blinking pattern of the LED on the inverter P C board or the outdoor electronic control P C board NOTE The indoor unit may have been connected to a non low standby power model outdoor unit To use a low standby power model clear the error history by referring to Deleting the memorized abnormal condition described in 10 2 1 When the error history is being cleared the connection information also will be initialized The indoor unit will be compatible with a low standby power model after initialization If the operation indicator lamp continues to flash as shown in No 1 after the procedure refer to 10 6 How to check miswiring and serial error OBH600C 23 OPERATION INDICATOR Uu AE Operation indicator lamp Symptom Condition Left lamp lights and lower lamp flashes The operation mode of the each indoor unit S00000 8000008 is differently set to COOL includes DRY and Unify the operation mode Operation p e operates but HEAT at the same time the operation mode Refer to outdoor unit service mode 2 5 second OFF indoor unit does Sf the indoor unit that has operated at first has manual setting l not operate the priority MXZ type Outdoor unit 10 5 TROUBLE CRITERION OF MAIN PARTS MSZ SF25VE MSZ SF35VE MSZ SF42VE MSZ SF50VE Part name Ch
17. power control Follow the procedure Deleting the memorized abnormal condition described in 10 2 1 MSZ SF25VE ER2 MSZ SF35VE MSZ SF42VE MSZ SF50VE 1 New model OBH600C 2 PART NAMES AND FUNCTIONS MSZ SF25VE MSZ SF35VE MSZ SF42VE MSZ SF50VE Front panel Air filter A Nano platinum filter Air cleaning filter Electrostatic anti allerg enzyme filter option Horizontal vane Heat exchanger Emergency operation switch i Tel Operation I Remote control indicator lamp j i receiving section Remote controller ACCESSORIES Model MSZ SF25VE MSZ SF35VE MSZ SF42VE MSZ SF50VE Installation plate Installation plate fixing screw 4 x 25 mm Remote controller holder Fixing screw for 3 5 x 16 mm Black Battery AAA for remote controller Wireless remote controller Felt tape For left or left rear piping OBH600C 4 3 SPECIFICATION Indoor model MSZ SF25VE MSZ SF35VE MSZ SF42VE MSZ SF50VE Power supply Single phase 230 V 50 Hz Power input __ Cooling 18 1 Heating 27 Running Cooling 0 16 Electrical current 1 Heating 0 22 Model RC0J21 AA Cooli Current 1 ae Heating 0 22 Dimensions W x H x D 798 x 299 x 195 Weight 10
18. seconds passes after EMERGENCY OPERATION switch is pressed the voltage measured at 2 above goes 0 VDC although the indoor P C board is normal Does the voltage between CN211 Is there 325 VDC and on the power P C board between CN211 Yes rise to the range of 3 to 6 VDC within Replace the indoor fan motor and 12 seconds after EMERGENCY OPERATION switch is pressed Does the voltage between CN102 and JPG GND on the indoor Replace the indoor power electronic control P C board fall to Replace the indoor electronic P C board Yes 2 V or less within 12 seconds after No control P C board EMERGENCY OPERATION switch is pressed The indoor fan motor error has occurred and the indoor fan repeats 12 second ON and 30 second OFF 3 times and then stops Measure the voltage CN102 Measure the voltage between CN211 4 and JPG GND on the indoor Is it unchanged holding and while the fan motor is E 0 or 15 VDC No electronic control P C board when i Yes Changed the fan motor is rotaring Unchanged Replace the indoor fan motor Y Replace the indoor power P C lt Is it unchanged holding Replace the indoor board Yes 0 or 5 VDC No board Unchanged Changed OBH600C 25 Check of remote controller and indoor electronic c
19. the switch board the display board the receiver board and the indoor electronic control P C board 1 Remove the panel Refer to 1 and the corner box right 2 Remove the screw of the V A clamp Remove the V A clamp and the indoor outdoor connecting wire 3 Remove the indoor electrical box Refer to 2 4 Remove the earth wire connected to the electrical box from the indoor power P C board 5 Disconnect the following connectors Indoor electronic power P C board CN201 Terminal block CN202 To the indoor electronic control P C board 6 Remove the indoor power P C board 7 Disconnect the following connectors Indoor electronic control P C board CN111 Room temperature thermistor 8 Unhook the catch of the display P C board holder from the electrical box right side 9 Open the rear cover of the display P C board holder and remove the switch board the display board and the receiver board Remove the indoor electronic control P C board OBH600C 33 Catch of the display P C board holder Photo 3 Earth wire Screw of the terminal block Earth wire Electrical box Screw of the electrical cover pu d Display P C board holder Upper catch Indoor power P C board 1 Indoor electronic d control P C board Screw of the electrical box Catch of the display P C board holder OPERATING PROCEDURE PHOTOS 4 Removing the nozzle assembly Pho
20. to start one by one OBH600C 12 9 MICROPROCESSOR CONTROL MSZ SF25VE MSZ SF35VE MSZ SF42VE MSZ SF50VE WIRELESS REMOTE CONTROLLER Signal transmitting section MITSUBISHI ELECTRIC TEMP DONIOFF v ITs IL FAN SPEED CONTROL button VANE CONTROL button OPERATION SELECT button Mon Tue Wed Thu Fri Sat Sun ECONO COOL button CLOCKO ON DOFF 123490 GO GO Doa TIME TIMER set buttons FORWARD button BACKWARD button WEEKLY TIMER set button CLOCK RESET 1 RESET button CLOCK SET button OPERATE STOP ON OFF button Temperature buttons Indication of remote controller model is on back NOTE Last setting will be stored after the unit is turned OFF with the remote controller Indoor unit receives the signal of the remote controller with beeps INDOOR UNIT DISPLAY SECTION Operation Indicator lamp The operation indicator at the right side of the indoor unit indicates the operation state The following indication applies regardless of shape of the indication Indication Operation state Room temperature e e The unit is operating to About 2 C or more away ee e reach the set temperature from set temperature Lighted XX Blinking The room temperature is Q About 1 to 2 C from set gt approaching the se
21. 5VE MSZ SF42VE MSZ SF50VE Unit mm Refrigerant pipe 29 52 MSZ SF25 35 42VE 012 7 MSZ SF50VE with heat insulator Indoor coil thermistor RT12 main Flared connection Indoor coil thermistor RT13 sub Room temperature thermistor RT11 Flared connection Refrigerant pipe 26 35 with heat insulator Refrigerant flow in cooling gt Refrigerant flow in heating OBH600C 10 8 SERVICE FUNCTIONS MSZ SF25VE MSZ SF35VE 8 1 TIMER SHORT MODE For service the following set time can be shortened by bridging JPG and JPS on the electronic control P C board Refer to 10 7 Set time 3 minutes 3 seconds It takes 3 minutes for the compressor to start operation However the starting time is shortened by bridging 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 MSZ SF42VE MSZ SF50VE How to modify the remote controller P C board Remove batteries before modification The board has a print as shown below NOTE For modification take out the batteries and press the OPERATE STOP ON OFF button 2 or 3 times at first After modification put back the batteries then press the RESET button NI
22. Changes for the Better MITSUBISHI MSZ SF25 35 42 50VE ERJ have been added ELECTRIC x SPLIT TYPE AIR CONDITIONERS Please void OBH600 REVISED EDITION B INDOOR UNIT SERVICE MANUAL REVISED EDITION C Models MSZ SF25VE Ei E2 ER2 MSZ SF35VE Ei E2 EN2 ER2 MSZ SF42VE Ei 2 ER2 MSZ SF50VE Ei EZ EN2 ER2 Outdoor unit service manual MUZ SF VE H Series OBH629 MXZ C VA Series OB584 MXZ D VA Series OBH626 MXZ 8B Series OCH480 CONTENTS 1 TECHNICAL CHANGES 3 2 PART NAMES AND 4 35 SPECIEICATIONE nS 5 NOISE CRITERIA CURVES 6 Z 5 OUTLINES AND DIMENSIONS 7 6 WIRING 8 7 REFRIGERANT SYSTEM DIAGRAM 10 8 SERVICE FUNCTIONS 11 9 MICROPROCESSOR CONTROL 13 10 19 11 DISASSEMBLY INSTRUCTIONS 32 PARTS CATALOG OBB600 NOTE C RoHS compliant products have lt G gt mark on the spec name plate C Use the specified refrigerant on
23. ENCY OPERATION switch on the right side of the indoor unit Set temperature 24 Emergency operation is available when the remote controller is miss Fan speed Med ing has failed or the batteries of the remote controller run down The Horizorifal vana Auto unit will start and OPERATION INDICATOR lamp will light The first 30 minutes of operation is the test run operation This opera tion is for servicing The indoor fan runs at High speed and the tem perature control does not work The operation mode is indicated by the Operation Indicator lamp as following Operation Indicator lamp After 30 minutes of test run operation the system shifts to EMERGENCY COOL j O EMERGENCY COOL HEAT MODE with a set temperature of 24 C The fan speed shifts to Med EMERGENCY HEAT Lighted The coil frost prevention works even in the test run or the emergency O Not lighted operation STOP In the test run or emergency operation the horizontal vane operates in VANE AUTO mode Emergency operation continues until EMERGENCY OPERATION switch is pressed once or twice or the unit receives any signal from the remote controller In case of latter normal operation will start NOTE Do not press EMERGENCY OPERATION switch during nor mal operation Emergency operation switch E O SW 9 11 3 MINUTE TIME DELAY OPERATION When the system turns OFF compressor will not restart for 3 minutes as 3 minute time delay function ope
24. OTE It takes up to 1 minute to indicate the outdoor unit abnormality Even if the OPERATION INDICATOR lamp is not lighting keep checking at least 1 minute or longer seconds Stays ON for 3 seconds without beep Yes The outdoor unit is abnormal No Y Y The outdoor unit is abnormal Check the blinking pattern and identify the abnormal point by referring to the outdoor unit failure mode table Refer to outdoor unit service manual Make sure to check at least two consecutive blinking cycles 3 The indoor unit is abnormal Check the blinking pattern and identify the abnormal point by referring to the indoor unit failure mode table Refer to 10 2 2 Make sure to check at least two consecutive blinking cycles 2 lt Releasing the failure mode recall function Y Release the failure mode recall unction by the following procedures Turn OFF the power supply and tu rn it ON again Press RESET button of the remote controller Y Repair the failure parts Deleting the memorized abnormal condition CD 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 me
25. PPON SEIKI CO LTD zi 219 o MD 0396 001 07076 Pa 94V 0 7 D The P C board has the print J1 and J2 Solder J1 and J2 according to the number of indoor unit as shown in Table 1 After modification press the RESET button Table 1 1 unit operation 2 units operation 3 units operation 4 units operation No 1 unit No modification Same as at left Same as at left Same as at left No 2 unit Solder J1 Same as at left Same as at left No 3 unit Solder J2 Same as at left No 4 unit How to set the remote controller exclusively for particular indoor unit Solder both J1 and J2 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 accept 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 is turned OFF or the power supply is shut down Please conduct the above setting once again after the power has restored OBH600C 1 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 AUTO RESTART FUNCTION automatically starts operation in the same mode just
26. R11 Indoor fan motor CN211 325 VDC GND high voltage DC 15 VDC 3 6 VDC 0 or 15 VDC Indoor power P C board Connector Terminal Block CN201 Connector to indoor electronic control P C board CN202 Reactor L111 Resistor R111 Room temperature thermistor RT11 Indoor electronic Indoor coil thermistor RT12 RT13 control P C board Connector to indoor electronic control Receiver board P C board CN102 a z O o 8 ieu S gt LO o Resistance kO O evis2 quo Z Vane motor E D N L CN151 k e 3 27 o ff SE Lc ta V B qe 0 Displav board EG SED Eeee 5 ze 0 10 20 30 40 50 60 z 1 EY S play NE LR adsl 7 DMO0NG07 e Temperature C
27. REVISED EDITION C Distributed in Aug 2013 No OBH600 REVISED EDITION B Distributed in Nov 2012 No OBH600 REVISED EDITION A Distributed in Nov 2011 No OBH600 New publication effective Dec 2013 Made in Japan Specifications are subject to change without notice 36
28. ate ope OPERATION INDICATOR lamp on the indoor unit is flashing ON and OFF Outdoor unit Outdoor unit Unit does not Indoor unit Indoor unit does Test Run operation means the operates only does not operate nor operates when not operate when operation within 30 minutes af in Test Run operate even mal operation EMERGENCY EMERGENCY ter EMERGENCY OPERATION operation X in Test Run in COOL or OPERATION OPERATION switch is pressed operation X HEAT mode switch is pressed switch is pressed If blinking of OPERATION INDI CATOR lamp cannot be checked it can be checked with failure Check room temperature thermistor Refer to 10 7 Test point diagram and voltage Refer to How to check inverter com pressor Refer to Check of R V coil Refer to 10 6 Check of remote controller and indoor electronic control P C board 1 Check indoor out door connecting wire Check if the power is supplied to the indoor unit Refer to 10 6 Check of indoor P C board and indoor fan motor mode recall function Left lamp Left lamp Left lamp Left lamp Left lamp Left lamp Left lamp Left lamp Flash on and 2 time flash 3 time flash 4 time flash 5 time flash 6 time flash 7 time flash 14 time flash off at 0 5 sec
29. ctromagnetic noise enters into TV sets or radios lt Is the unit earthed Earth the unit No Yes Is the distance between the antennas and the indoor unit within 3 m or is the distance between the antennas and the Yes outdoor unit within 3 m Extend the distance between the antennas and the indoor unit and or the antennas and the outdoor unit No Is the distance between the TV sets or radios and the indoor unit within 1 m or is the distance between the TV sets or Yes radios and the outdoor unit within 3 m Extend the distance between the TV sets and or radios and the indoor unit or the TV sets or radios and the outdoor unit No Are the antennas damaged Is the coaxial cable damaged Replace or repair the antenna Is there any poor contact in the anten Yes Replace or repair the coaxial cable na wiring p Is the indoor outdoor connecting wire Extend the distance between the indoor outdoor of the air conditioner and the wiring of connecting wire of the air conditioner and the wir the antennas close 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 following before asking for service 1 Devices affected by the electromagnetic noi
30. e MSZ SF25 35 42 50VE m 1 E2 ER2 Insulation 37 Liquid line 6 35 0 39m Flared connection 56 35 Gas line 9 52 0 34m Flared connection 09 52 MSZ SF25 35 42VE 12 7 MSZ SF50VE Drain hose Inslation 28 Connected part 16 O D Piping MSZ SF25 35 42 50VE Insulation 37 Liquid line 6 35 0 5m Flared connection 6 35 Gas line 49 52 0 43m Flared connection 9 52 MSZ SF25 35 42VE 12 7 MSZ SF50VE Drain hose Inslation 28 Connected part 16 O D m N1 EN2 Piping OBH600C 7 6 WIRING DIAGRAM m MSZ SF25VE j Evi Enz MSZ SF42VE E1 22 Eni Ev SYMBOL NAME Fil T3 158L2500 By ANT ui REACTOR 5 eV wu HU nu MF FAN MOTOR 541
31. e indoor fan operates following the cold air prevention control This mode continues until the temperature of indoor heat exchanger falls 3 Defrosting Defrosting starts when the temperature of outdoor heat exchanger becomes too low The compressor stops once the indoor outdoor fans stop the 4 way valve reverses and the compressor re starts This mode continues until the temperature of outdoor heat exchanger rises or the fixed time passes 9 5 AUTO CHANGE OVER AUTO MODE OPERATION Once desired temperature is set unit operation is switched automatically between COOL and HEAT operation Mode selection 1 Initial mode When unit starts the operation with AUTO operation from OFF If the room temperature is higher than the set temperature operation starts in COOL mode If the room temperature is equal to or lower than the set temperature operation starts in HEAT mode 2 Mode change COOL mode changes to HEAT mode when about 15 minutes have passed with the room temperature 1 C below the set temperature HEAT mode changes to COOL mode when about 15 minutes have passed with the room temperature 1 C above the set temperature NOTE 1 If two or more indoor units are operating in multi system there might be a case that the indoor unit which is operating in ici AUTO cannot change over to the other operating mode COOL HEAT and becomes a state of standby Refer to NOTE 2 FOR MULTI SYSTEM AIR CONDITIONER OBH600C 14
32. e power supply lt Preparation of the remote controller gt While pressing both OPERATION SELECT button and TEMP 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 Make sure that the indicators on the LCD screen shown in the right figure are all displayed Then release the but tons 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 X1 urere ne i Ju s lc X1 Regardless of normal or abnormal condition CER on he WoT Pr Sat Si a short beep is emitted once the signal is ait M Sun Y received 123459 DB a8 b 80 Does the left lamp of OPERATION INDICATOR lamp on the indoor unit blink at the interval of 0 5 seconds Blinks Either indoor or outdoor unit is abnormal Beep is emitted at the same timing as the blinking of the left lamp of OPERATION INDICATOR lamp x2 Yes Judgment of indoor outdoor abnormality Y Blinks Before blinking does the left lamp of OPERATION INDICATOR lamp stay ON for 3 Indoor unit is normal But the outdoor unit might be abnormal because there are some abnor No malities that can not be recalled with this way OFF Confirm if outdoor unit is abnormal according to the detailed outdoor unit failure mode recall function N
33. eck method and criterion Figure Measure the resistance with a tester Room temperature nnn dM Refer to 10 7 Test point diagram and voltage Indoor electronic control RT12 RT13 P C board for the chart of thermistor Indoor fan motor MF Check 10 6 Check of indoor fan motor Measure the resistance between the terminals with a tester Temperature 10 30 C Color of the lead wire Normal RED BLK 232 2680 BLR BLK Vane motor MV OBH600C 24 10 6 TROUBLESHOOTING FLOW A Check of indoor fan motor The indoor fan motor error has occurred and the indoor fan does not operate Turn OFF the power supply Pay enough 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 Measure the supply voltage as follows within 12 seconds after EMER GENCY OPERATION switch is pressed If more than 12 seconds passes turn OFF the power supply and turn it Is there any foreign matter that interferes the rotation of the line flow fan No ON again then measure the voltage lt Indoor power P C board gt 1 Measure the voltage between CN211 and Yes 2 Measure the voltage between CN211 and Indoor electronic control P C board 3 Measure the voltage between CN102 and JPG GND R the forei tt d adjusbih ena S X If more than 12
34. es X1 The fan motor connector s lead wire is red whereas is black Measure the resistance between X2 Connect of the tester to fan motor connector s CN211 and of indoor fan lead wire and to lead wire otherwise the motor connector X1 2 resistance cannot be measured properly X3 Please replace the fuse after removing the indoor power P C board from the electrical box Y Replace the fuse F11 and the Is the resistance 1 or more No indoor fan motor 3 3 Yes Replace the fuse F11 x3 Measure the resistance of reactor L111 Is the resistance of reactor L111 Taqna MSZ SF25 42VE resistor R111 MSZ MSZ SF25 42VE approximately eplace the Indoor J3F SF35 50VE on the indoor power P C power board Board 2 2 resistor R111 MSZ the indoor fan motor SF35 50VE approximately 3 9 T Is there approximately 5 VDC between 5 V and JPG GND of the indoor electronic control P C board Is there i Indoor power Fuse F11 Varistor approximately 9 V to 13 VDC between Replace the indoor fan motor P C board NR11 12 V and JPG GND of the indoor electronic control P C board F l No 3 L111 R111 Are connector CN10A on the indoor electronic control P C Connect the connector or repair discon board or lead wires discon Yes nection CN211 nected No Indoor electronic X Replace the indoor electronic control P C board control P C b
35. g number d Sat ines C 17273 4 Mon Tue Wed Thu Fri Sat Sun All days can be selected 3 and buttons to set ON OFF time and temperature Mon Tue Wed Thu Fri Sat Sun E g ON 6 00 ps and 24 C are 1 5 09 psc selected E Pressing selects ON OFF timer A A OON OFF Pressing Pressing verte adjusts the time adjusts the tem Pressing DELETE Seite deletes timer setting Hold down the button to change the time quickly Press and buttons to continue setting the timer for other days and or numbers 4 Press button to complete and transmit the weekly timer setting Mon CSET which was blink CLOCK ing goes out and the 12 717 current time will be NOTE displayed Press button to transmit the setting information of weekly timer to the indoor unit Point the remote controller toward the indoor unit for 3 seconds When setting the timer for more than one day of the week or one number button does not have to be pressed per each setting Press button once after all the settings are complete All the weekly timer settings will be saved Press button to enter the weekly timer setting mode and press and hold button for 5 seconds to erase all weekly timer settings Point the remote controller toward the indoor unit OBH600C 17 WEEKLY 5 Press button to turn the weekly ti
36. ith multi outdoor unit even if any indoor unit turns thermostat off this control does not work in the indoor unit OBH600C 15 9 ECONO COOL 1 operation ECONOmical operation When ECONO COOL button is pressed in COOL mode set temperature is automatically set 2 C higher by the micrroprocessor However the temperature on the LCD screen on the remote controller is not changed Also the horizontal vane swings in various cycle SWING operation makes you feel cooler than set temperature So even though the set temperature is higher the air conditioner can keep comfort As a result energy can be saved To cancel this operation select a different mode or press one of the following buttons in ECONO COOL operation ECONO COOL or VANE CONTROL button 9 7 TIMER OPERATION 1 How to set the time 1 Check that the current time is set correctly NOTE Timer operation will not work without setting the current time Initially 0 00 blinks at the current time display of TIME MONITOR so set the current time correctly with CLOCK SET button How to set the current time a Press the CLOCK set button b Press the TIME SET buttons CA and to set the current time Each time FORWARD button is pressed the set time increases by 1 minute and each time BACKWARD button is pressed the set time decreases by 1 minute Pressing those buttons longer the set time increases decreases by 10 minutes c Press the CLOCK se
37. ly Never use any refrigerant other than that 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 lt Preparation before the repair service gt e Prepare the proper tools Prepare the proper protectors Provide adequate ventilation After stopping the operation of the air conditioner turn off the power supply breaker and remove the power plug Discharge the capacitor before the work involving the electric parts lt Precautions during the repair service gt e Do not perform the work involving the electric parts with wet hands Do not pour water into the electric parts Do not touch the refrigerant Do not touch the hot or cold areas in the refrigeration cycle When the repair or the inspection of the circuit needs to be done without turning off the power exercise great caution not to touch the live parts Revision A e MSZ SF25 35 42 50VE E2 and MSZ SF25 35 42 50VE have been added Revision B How to check miswiring and serial signal error for MUZ type has been added The description about Low standby power control has been added to TECHNICAL CHANGES Revisi
38. mer ON TR lights When the weekly timer is ON the day of the week whose timer setting is complete will light WEEKLY Press button again to turn the weekly timer OFF goes out NOTE The saved settings will not be cleared when the weekly timer is turned OFF 2 Checking weekly timer setting EDIT SEND 1 Press button to enter the weekly timer setting mode cse_ blinks 2 Press or buttons to view the setting of the particular day or number 3 Press button to exit the weekly timer setting 9 9 i save ff OPERATION 1 How to set i save operation 1 Press OPERATE STOP ON OFF button 2 Select COOL HEAT or ECONO COOL mode 3 Press i save button 4 Set the temperature fan speed and airflow direction for i save operation NOTE i save operation cannot be selected during DRY or AUTO mode operation The setting range of HEAT mode i save operation is 10 C and 16 31 C 2 groups of setting can be saved One for COOL ECONO COOL one for HEAT i save operation and the weekly timer operation cannot be used together 2 How to cancel operation Press i save button again i save operation can also be cancelled by pressing OPERATION SELECT button to change the operation mode The same setting is select from the next time by simply pressing i save button 9 10 EMERGENCY TEST OPERATION In case of test run operation or emergency operation use Operation mode COOL HEAT EMERG
39. morized abnormal condition is deleted x4 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 after 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 x4 The information regarding whether the connected 3X2 Blinking pattern when the indoor unit is abnormal Blinking at 0 5 low standby power model will also be initialized 2 5 second Ore gecond interval ON NN OFF LL Repeated cycle c Blinking at 0 5 L 5 second second interval Sat a Beeps Beeps wem cycle Repeated cycle 3 3 Blinking pattern when the outdoor unit is abnormal 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 E deo lt me n o pe L E ort c I lt No beep Beeps No beep Repeated cycle Repeated cycle m Repeated cycle OBH600C 20 outdoor unit is a low standby power model or a non Default compatible with a low standby power model 2 Indoor unit failure mode table The left lamp of OPERATION INDI CATOR lamp Abnormal point Failure mode Condition Not lighted Normal 1 time flash every 0 5 second Room temperature thermistor The room tem
40. not be able to operate with it if the inverter fluorescent light is turned on when the room is warm the unit may be able to operate with the remote controller Replace the remote controller Reinstall the unit away from lights Attach a filter on receiving part Check of indoor P C board and indoor fan motor Turn OFF the power supply Remove indoor fan motor connector CN211 from indoor power P C board and vane Measure the resistance of indoor fan Short circuit motor connector CN151 from the indoor motor ort circuit electronic control P C board and turn ON Refer to 10 5 Replace the indoor fan motor the power supply Does the unit operate with the remote controller Measure the resistance of the vane Short circuit Does OPERATION INDICATOR lamp light gt motor coil Replace the vane motor and the indoor up by pressing EMERGENCY OPERATION Yes Refer to 10 5 electronic control P C board switch No Replace the varistor NR11 and fuse F11 X3 Yes Is the varistor NR11 burnt and the fuse F11 blown No Turn OFF the power supply Check both parts side and pattern Be sure to check both the fuse side of the indoor power P C board and the varistor in any case visually Is the fuse F11 blown only No Y
41. nt Lighted 3 Blinking Notlighted Operation indicator lamp Symptom Condition Remedy Miswiring or serial signal Left lamp flashes 0 5 second ON gosgososo 0 5 second OFF Indoor coil thermistor Room tem perature thermistor Left lamp flashes 2 time flash w SPACE 2 5 second OFF Indoor fan motor Left lamp flashes 3 time flash e 0oveosooooosososooo h 2 5 second OFF Indoor con trol system Left lamp flashes 4 time flash e oeosoeooooosososoe ICT 2 5 second OFF Outdoor power sys tem Left lamp flashes 5 time flash Y 000008080 Pee ey 2 5 second OFF Outdoor thermistors Left lamp flashes 6 time flash Poir Y Y e ovososoeoeoooooto 2 5 second OFF Outdoor control sys tem Left lamp flashes 7 time flash w Lge LANDS NER eososoeoeososooooos 2 5 second OFF Other ab normality Left lamp flashes 14 time flash or more 2 5 OFF Indoor unit and outdoor unit do not operate The serial signal from the outdoor unit is not received for 6 minutes The indoor unit is connected to a low stand by power model after once connected to a non low standby power model Refer to 10 6 How to check miswiring and serial signal er ror Refer to NOTE The indoor coil or the room temperature ther mistor is short or open circui
42. oard CN10A t GND JPG OBH600C 27 D How to check miswiring and serial signal error MUZ Type C Turn the main power supply OFF Y Is there rated voltage in the power supply No Yes Check for incorrect indoor outdoor connecting wiring Yes Y Was the indoor unit ever connected to the Multi MXZ series and operated turned on initialization The connection information to the Multi series is stored in the indoor unit Refer to Deleting the memorized abnormal condition described in 10 2 1 to clear the error history When the error history is being cleared the con nection information also will be initialized The indoor unit will be compatible with a low standby power model after Y A Y Turn the main power supply ON Y Is there rated voltage between outdoor terminal block S1 and S2 yres Check the power supply Check for miswiring broken wires and loose No wire connection between the main power supply and outdoor terminal block S1 and between the main power supply and outdoor Wait for 2 or more minutes after the main power supply is turned on Touch S2 and S3 with tester probes and start the emergency operation terminal block S2 Y When the emergency operation starts does the rated voltage occur for 2
43. om the initial room temperature 1 Coil frost prevention Coil frost prevention works the same way as that in COOL mode 9 1 1 2 Low outside temperature operation Low outside temperature operation works the same way as that in COOL mode 9 1 2 3 Indoor fan speed control Indoor fan speed control works the same way as that in COOL mode 9 1 3 9 3 FAN 3 OPERATION 1 OPERATION INDICATOR lamp of the indoor unit turns on with a beep tone 2 Select FAN mode with OPERATION SELECT button 3 Select the desired fan speed When AUTO it becomes Low Only indoor fan operates Outdoor unit does not operate 9 4 HEAT 5 OPERATION 1 Press OPERATE STOP ON OFF button OPERATION INDICATOR lamp of the indoor unit turns on with a beep tone 2 Select HEAT mode with OPERATION SELECT button 3 Press TEMPERATURE buttons TEMP or button to select the desired temperature The setting range is 16 31 C 1 Cold air prevention control When the compressor is not operating or is starting and the temperature of indoor heat exchanger and or the room tem perature is low or when defrosting is being done the indoor fan will stop or rotate in Very Low speed 2 High pressure protection The compressor operational frequency is controlled by the temperature of the indoor heat exchanger to prevent the con densing pressure from increasing excessively When the temperature of indoor heat exchanger becomes too high the high pressure protection works Th
44. on C MSZ SF25 35 42 50VE m R2 have been added OBH600C 2 1 TECHNICAL CHANGES MSZ SF25VE m MSZ SF35VE m MSZ SF42VE m MSZ SF50VE m 1 New model MSZ SF25VE E MSZ SF35VE E MSZ SF42VE E MSZ SF50VE E MSZ SF25VE E MSZ SF35VE m MSZ SF42VE E MSZ SF50VE m MSZ SF25VE 2 gt MSZ SF35VE 2 MSZ SF42VE 2 gt MSZ SF50VE 2 MSZ SF25VE MSZ SF35VE MSZ SF42VE MSZ SF50VE 1 Indoor electronic control P C board has been changed E2 EN2 and Connecting these models to the MUZ SF VE H series outdoor units enables the low standby power control Refer to the tech nical guide OBT17 about the low standby power control These models may be connected to the MUZ SF VE H series after once connected to the MXZ series and operated for example because of relocation In that case the MUZ SF VE H series outdoor units will not operate without taking a step E z EN1 EN1 EN1 MSZ SF25VE E gt MSZ SF35VE E MSZ SF42VE E gt MSZ SF50VE E 2 N N N N models are compatible with the outdoor units with low standby
45. onditioner starts operating with timer cancelled when power is restored OBH600C 16 9 8 WEEKLY TIMER OPERATION maximum of 4 ON or OFF timers can be set for individual days of the week A maximum of 28 ON or OFF timers can be set for a week E g Runs at 24 C from waking up to leaving home and runs at 27 C from getting home to going to bed on weekdays Runs at 27 C from waking up late to going bed early on weekends Moi Setting1 Setting2 Setting3 Setting4 ON OFF ON OFF 24 C 27 C Fri 6 00 8 30 17 30 22 00 Setting1 Setting2 ON OFF 27 C Sun 8 00 21 00 NOTE e The simple ON OFF timer setting is available while the weekly timer is on In this case the ON OFF timer has priority over the weekly timer the weekly timer operation will start again after the simple ON OFF timer is complete When the weekly timer is set temperature cannot be set to 10 C The weekly timer operation and i save operation cannot be used together 1 How to set the weekly timer Make sure that the current time and day are set correctly 1 Press button to enter the weekly timer setting mode Mon SET 1 Toc u blinks 2 Press and buttons to select setting day and number E g Mon Sun Mon Tue Wed Thu Fri Sat Sun SET and 1 are selected 1 1 Pressing selects the day of Pressing selects the week to be set the settin
46. onents for bursting and discoloration 4 When troubleshooting refer to 10 2 10 3 and 10 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 Press RESET button with a thin instrument and Then reattach the front lid then use the remote controller Insert the negative pole of the batteries first Check if the polarity A of the batteries is correct RESET button 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 3 Do not use the leaking batteries OBH600C 19 10 2 FAILURE MODE RECALL FUNCTION 1 Flow chart of failure mode recall function for the indoor outdoor unit 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 4 disappears the memorized failure details can be recalled Operational procedure The cause of abnormality cannot be found because the abnormality does not recur Setting up the failure mode recall function Turn ON th
47. ontrol P C board XCheck if the remote controller is exclusive Press OPERATE STOP ON OFF button on the remote controller Is LCD display on the remote controller visible No Not clear ie Remove the batteries then set them back and press RESET button Refer to 10 1 4 Check if the unit operates with the remote controller Does the unit operate with the remote controller No Yes OBH600C for this air conditioner Replace the batteries Refer to 10 1 4 Turn ON a radio to AM and press OP gt ERATE STOP ON OFF button on the remote controller 1 Y Is noise heard from radio Yes Y Are there any fluorescent lights of inverter or rapid start type within the range of 1 m x2 No Replace the indoor electronic control P C board Including the receiver 26 No Yes x1 Look at the image of the signal transmitting section of the remote controller through the monitor of a digital camera or a camera phone It is normal if the LED of the signal transmitting section lights up when the OP ERATE STOP ON OFF button on the remote control ler is pressed However it may be difficult to see the illuminated LED of the signal transmitting section with a smartphone camera x 2 If the inverter fluorescent light is turned on when the room is cool the unit may have difficulty receiving the signal from the remote controller or may
48. perature thermistor short or open circuit is detected every 8 seconds dur ing operation Refer to the characteristics of the room temperature thermistor 10 7 2 time flash 2 5 second OFF Indoor coil thermistor The indoor coil thermistor short or open circuit is detected every 8 seconds during operation Refer to the characteristics of the main indoor coil ther mistor the sub indoor coil thermistor 10 7 3 time flash 2 5 second OFF Serial signal The serial signal from outdoor unit is not re ceived for a maximum of 6 minutes Refer to 10 6 How to check miswiring and serial signal error 11 time flash 2 5 second OFF Indoor fan motor The rotational frequency feedback signal is not emitted for the 12 seconds after the indoor fan motor is operated Refer to 10 6 9 Check of indoor fan motor 12 time flash 2 5 second OFF Indoor control System It cannot properly read data in the nonvolatile memory of the indoor electronic control P C board Replace the indoor electronic control P C board NOTE Blinking patterns of this mode differ from the ones of TROUBLESHOOTING CHECK TABLE 10 4 OBH600C 21 10 3 INSTRUCTION OF TROUBLESHOOTING Indoor unit operates Outdoor unit does not operate normally Indoor unit does not receive the signal from re mote controller Indoor unit oper ates Outdoor unit does not oper
49. rates to protect compressor from overload OBH600C 18 10 TROUBLESHOOTING MSZ SF25VE MSZ SF35VE MSZ SF42VE MSZ SF50VE 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 confirm ing 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 P C board 3 When removing the 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 Incorrect Correct Te m Lead wiring Housing point 3 Troubleshooting procedure 1 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 OPERATION INDICATOR lamp is flashing ON and OFF before starting serv ice 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 comp
50. se TV sets radios FM AM broadcast shortwave 2 Channel frequency broadcast station affected by the electromagnetic noise 3 4 Layout of Channel frequency broadcast station unaffected by the electromagnetic noise indoor outdoor unit of the air conditioner indoor outdoor wiring earth 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 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 OBH600C 30 10 7 TEST POINT DIAGRAM AND VOLTAGE Indoor power P C board Indoor electronic control P C board Receiver board Display board Switch board MSZ SF25VE MSZ SF35VE MSZ SF42VE MSZ SF50VE Fuse F11 Varistor N
51. t Refer to the characteristics of indoor coil thermistor and the room temperature thermistor 10 7 The rotational frequency feedback signal is not emitted during the indoor fan operation Refer to 10 6 Check of in door fan motor It cannot properly read data in the nonvolatile memory of the indoor electronic control P C board Replace the indoor electronic control P C board It consecutively occurs 3 times that the com pressor stops for overcurrent protection or start up failure protection within 1 minute after start up Refer to How to check of in verter compressor Refer to outdoor unit service manual Check the stop valve The outdoor thermistors short or open circuit during the compressor operation Refer to Check of outdoor thermistor Refer to outdoor unit service manual It cannot properly read data in the nonvolatile memory of the inverter P C board or the out door electronic control P C board Replace the inverter P C board or the outdoor electronic control P C board Refer to outdoor unit service manual An abnormality other than above mentioned is detected Check the stop valve Check the 4 way valve Confirm the abnormality in detail using the failure mode recall function for outdoor unit Outdoor control sys tem Left lamp lights up Outdoor unit does not oper ate It cannot properly read data
52. t button 2 Press OPERATE STOP ON OFF button to start the air conditioner 3 Set the time of timer ON timer setting a Press ON TIMER button eoN during operation b Set the time of the timer using TIME SET buttons C and Cv x OFF timer setting a Press OFF TIMER button oorr during operation b Set the time of the timer using TIME SET buttons C and Cv x x Each time FORWARD button is pressed the set time increases by 10 minutes each time BACKWARD but ton Cv is pressed the set time decreases by 10 minutes 2 To release the timer To release ON timer press ON TIMER button oN To release OFF timer press OFF TIMER button ecrr TIMER is cancelled and the display of set time disappears PROGRAM TIMER OFF timer and ON timer can be used in combination The timer of the set time that is reached first will operate first and display shows the order of OFF timer and ON timer operation Example 1 The current time is 8 00 PM Example 2 The current time is 11 00 AM The unit turns off at 11 00 PM and on at 6 00 AM The unit turns on at 5 00 PM and off at 9 00 PM Current Current ON ON ON OFF OFF OFF on nn 13 OoN OOF Aan 11 OVO OQ 6 NOTE If the main power is turned OFF or a power failure occurs while ON OFF timer is active the timer setting is can celled As these models are equipped with an auto restart function the air c
53. t tem temperature O Not lighted perature Standby mode Only during multi system operation 9 1 COOL m1 OPERATION 1 Press OPERATE STOP ON OFF button OPERATION INDICATOR lamp of the indoor unit turns on with a beep tone 2 Select COOL mode with OPERATION SELECT button 3 Press TEMPERATURE buttons TEMP or button to select the desired temperature The setting range is 16 31 C 1 Coil frost prevention The compressor operational frequency is controlled by the temperature of the indoor heat exchanger to prevent the coil from frosting When the temperature of indoor heat exchanger becomes too low the coil frost prevention mode works The indoor fan operates at the set speed and the compressor stops This mode continues until the temperature of indoor heat exchanger rises 2 Low outside temperature operation When the outside temperature is lower low outside temperature operation starts and the outdoor fan slows or stops 3 Indoor fan speed control When the thermostat turns OFF the indoor fan operates very Low to reduce power consumption When the room temperature rises and the thermostat is ON the indoor fan operates according to the settings on the remote controller OBH600C 13 9 2 DRY A OPERATION 1 Press OPERATE STOP ON OFF button OPERATION INDICATOR lamp of the indoor unit turns on with a beep tone 2 Select DRY mode with OPERATION SELECT button 3 The set temperature is determined fr
54. to 4 1 Remove the panel Refer to 1 and the corner box right 2 Remove the indoor outdoor connecting wire Refer to 2 3 Remove the electrical cover Refer to 2 4 Disconnect the following connector lt Indoor electronic control P C board gt CN151 Vane motor 5 Remove the display P C board holder 6 Pull out the drain hose from the nozzle assembly and remove the nozzle assembly 7 Remove the vane motors Refer to 5 Screws of the vane motor unit cover Removing the horizontal vane motor 1 Remove the nozzle assembly Refer to 4 2 Remove the screws of the vane motor unit cover and pull out the vane motor unit 3 Remove the screws of the vane motor unit 4 Disconnect the connector from the vane motor 5 Remove the vane motor from the vane motor unit Sc ews of the vane motor unit OBH600C 34 OPERATING PROCEDURE PHOTOS 6 Removing the indoor fan motor the indoor coil Photo 5 thermistor and the line flow fan 1 Remove the panel Refer to 1 and the corner box Lead wire of the right indoor coil thermistor 2 Remove the indoor electronic control P C board holder the electrical box and the nozzle assembly 3 Remove the screws fixing the motor bed 4 Release the hooks of the water cut and remove the X water cut Water cut T Screw of 5 Loosen the screw fixing the line flow fan the upper 6 Remove the motor bed together with the indoor fan side of mo
55. tor and the motor band J d the heat 7 Release the hooks of the motor band and remove the exchanger motor band Pull out the indoor fan motor 8 Remove the indoor coil thermistor from the heat exchanger Install the indoor coil thermistor in its former position when assembling it Photo 5 9 Remove the screws fixing the left side and the upper right side of the heat exchanger Photo 7 Photo 5 10 Lift the heat exchanger and pull out the line flow fan ae Screws of to the lower left the motor bed Photo 6 Screw of the line flow fan Photo 7 Screws of the left side of the heat exchanger OBH600C 35 Fixing the indoor coil thermisor x There are 2 forms of parts for fixing the indoor coil thermistor Clip shape Holder shape Position and procedure for mounting the clip shape part 1 Set the indoor coil 2 Check the marked 3 Mount the thermistor in the center mounting position clip shape part of the clip shape part About the same length E NOTE m Take care to avoid loss and accidental falling of the clip shape part inside the unit m Mount the clip shape part on the marked position m Do not pull the lead wire when removing the indoor coil thermistor MITSUBISHI ELECTRIC CORPORATION HEAD OFFICE TOKYO BLDG 2 7 3 MARUNOUCHI CHIYODA KU TOKYO 100 8310 JAPAN Copyright 2011 MITSUBISHI ELECTRIC CORPORATION Distributed in Dec 2013 No OBH600
56. ut the outdoor side electronic wiring LD120 3 n LD120 M nj es refer to the outdoor unit electronic wiring RECEIVER OZRT at EUNT MES diagram for servicing 3 3 LD105 S 2 copper conductors only SWITCH BOARD For field wiring f mic 3 Symbols indicate O Terminal block ooog Connector OBH600C 8 MSZ SF35VE 2 MSZ SF50VE e 2 Evi EN2 SYMBOL NAME CERE oe ae FIL m 250V 1B 021 Fil RU MF FAN MOTOR s Ho VANE MOTOR G WHT tI e lt gt MV HORIZONTAL TO outooor EET RED ht NRL VARISTOR UNIT 8111 RESISTOR x ROOM TEMP RT11 e ane THERMISTOR _ RT12 ryeRMISTOR MAIN Tam us es 1 1211015 em o JH CUS Tiii TRANSFORMER DISPLAY rA INDOOR ELECTRONIC BOARD CONTROL BOARD B TERMINAL BLOCK LHe CN112 LD105 M e a EN 2 c I O
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