Mitsubishi Electric MSZ-HR25VF-E1 Service Manual Download | Manualshive

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Models

MSZ-HR25VF

-

E1

,

ER1

,

ET1

MSZ-HR35VF

-

E1

,

ER1

,

ET1

MSZ-HR42VF

-

E1

,

ER1

,

ET1

MSZ-HR50VF

-

E1

,

ER1

,

ET1

INDOOR UNIT

No. OBH822

Outdoor unit service manual

MUZ-HR∙VF Series (OBH823)

PARTS CATALOG (OBB822)

CONTENTS

1. TECHNICAL CHANGES ∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙ 2
2. PART NAMES AND FUNCTIONS ∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙ 3
3. SPECIFICATION ∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙ 4
4. NOISE CRITERIA CURVES ∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙ 5
5. OUTLINES AND DIMENSIONS ∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙ 6
6. WIRING DIAGRAM ∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙ 7
7. REFRIGERANT SYSTEM DIAGRAM ∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙ 8
8. SERVICE FUNCTIONS ∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙ 10
9. MICROPROCESSOR CONTROL ∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙ 12

10. TROUBLESHOOTING ∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙ 16
11. DISASSEMBLY INSTRUCTIONS ∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙ 29

SERVICE MANUAL

MSZ-HR25VF

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Summary of Contents for MSZ-HR25VF-E1

Page 1: ...R VF Series OBH823 PARTS CATALOG OBB822 CONTENTS 1 TECHNICAL CHANGES 2 2 PART NAMES AND FUNCTIONS 3 3 SPECIFICATION 4 4 NOISE CRITERIA CURVES 5 5 OUTLINES AND DIMENSIONS 6 6 WIRING DIAGRAM 7 7 REFRIGERANT SYSTEM DIAGRAM 8 8 SERVICE FUNCTIONS 10 9 MICROPROCESSOR CONTROL 12 10 TROUBLESHOOTING 16 11 DISASSEMBLY INSTRUCTIONS 29 SERVICE MANUAL MSZ HR25VF ...

Page 2: ...HR50VF E1 ER1 ET1 1 New model Preparation before the repair service 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 Precautions during the repair service Do not perform the work invol...

Page 3: ...e fixing screw 4 25 mm 5 Wireless remote controller 1 Felt tape For left or left rear piping 1 Battery AAA for remote controller 2 Operation indicator lamp Remote control receiving section Horizontal vane Air inlet Air ﬁlter Front panel Air outlet Heat exchanger Emergency operation switch Air cleaning ﬁlter Silver ionized air purifier filter option Remote controller OBH822 ...

Page 4: ...37 38 39 40 Med 30 31 34 36 Low 21 22 24 28 Heating Super High 43 44 46 47 High 37 40 41 Med 30 32 34 Low 21 24 27 Fan speed Cooling Super High rpm 1 120 1 280 1 130 High 900 950 970 1 000 Med 730 750 830 860 Low 550 630 660 Heating Super High 1 150 1 180 1 150 1 220 High 920 970 1 000 Med 730 770 800 Low 520 600 640 Fan speed regulator 4 Remote controller model RH18A NOTE Test conditions are base...

Page 5: ...AND SOUND PRESSURE LEVEL dB re 0 0002 MICRO BAR 90 80 70 60 50 40 30 20 10 63 125 250 500 1000 2000 4000 8000 NC 60 NC 50 NC 40 NC 30 NC 20 NC 70 BAND CENTER FREQUENCIES Hz COOLING FUNCTION SPL dB A LINE 43 HEATING 43 OCTAVE BAND SOUND PRESSURE LEVEL dB re 0 0002 MICRO BAR 90 80 70 60 50 40 30 20 10 63 125 250 500 1000 2000 4000 8000 NC 60 NC 50 NC 40 NC 30 NC 20 NC 70 BAND CENTER FREQUENCIES Hz C...

Page 6: ...6 OUTLINES AND DIMENSIONS 5 MSZ HR25VF MSZ HR35VF MSZ HR42VF MSZ HR50VF Unit mm OBH822 ...

Page 7: ...7 MSZ HR25VF MSZ HR35VF MSZ HR42VF MSZ HR50VF WIRING DIAGRAM 6 OBH822 ...

Page 8: ...pe ø9 52 with heat insulator Refrigerant pipe ø6 35 with heat insulator Indoor coil thermistor RT12 Indoor coil thermistor RT13 Indoor heat exchanger Flared connection Room temperature thermistor RT11 Flared connection Refrigerant flow in cooling Refrigerant pipe ø9 52 with heat insulator Refrigerant pipe ø6 35 with heat insulator Indoor coil thermistor RT12 Indoor coil thermistor RT13 OBH822 ...

Page 9: ...nger Flared connection Room temperature thermistor RT11 Flared connection Refrigerant flow in cooling Refrigerant pipe ø9 52 with heat insulator Refrigerant pipe ø6 35 with heat insulator Indoor coil thermistor RT12 Indoor coil thermistor RT13 OBH822 ...

Page 10: ...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 been restored J2 J4 The P C board has the print J2 ...

Page 11: ...ds 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 If the unit has been turned 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 the breaker from...

Page 12: ...VF MSZ HR35VF MSZ HR42VF MSZ HR50VF STOP OPERATE OFF ON button Fan speed control button Operation select button Timer mode select button Signal transmitting section Operation display section Time set buttons RESET button Vane control button Temperature buttons ECONO COOL button MICROPROCESSOR CONTROL 9 Indication Operation state Room temperature The unit is operating to reach the set temperature A...

Page 13: ...RATE OFF ON button 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 OPERATION 1 Press STOP OPERATE OFF ON button OPERATION INDICATOR lamp of the indoor unit turns on with a beep tone 2 Select HEAT mode with OPERA...

Page 14: ...t 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 VANE CONTROL button 5 STOP operation OFF and ON TIMER standby In the following cases the horizontal vane returns to the closed position a When STOP OPERATE OFF ON button is pressed POWER OFF b When the operation is stopped by the emergency oper...

Page 15: ...INDICATOR lamp will light up The first 30 minutes of operation is the test run operation This operation is for servicing The indoor fan runs at High speed and the temperature control does not work After 30 minutes of test run operation the system shifts to EMERGENCY COOL HEAT MODE with a set temperature of 24 C The fan speed shifts to Med The coil frost prevention works even in the test run or the...

Page 16: ...bnormality To make sure check how many times the OPERATION INDICATOR lamp is blinking ON and OFF before starting ser vice work 2 Before servicing check that the connector and terminal are connected properly 3 When the electric control P C board seems to be defective check the copper foil pattern for disconnection and the components for bursting and discoloration 4 When troubleshooting Refer to 10 ...

Page 17: ... up the failure mode recall function mentioned above Press STOP OPERATE OFF ON button of the remote controller the set temperature is displayed with the remote controller headed towards the indoor unit Press EMERGENCY OPERATION switch so that the memorized abnormal condition is deleted Release the failure mode recall function according to Releasing the failure mode recall function mentioned above ...

Page 18: ...istics of the main indoor coil thermistor the sub indoor coil thermistor 10 7 3 time blink 2 5 sec ond 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 blink 2 5 second OFF Indoor fan motor The rotational frequency feedback signal is not emitted for the 12 seconds after the indoor ...

Page 19: ...cted refer to outdoor unit service manual Left lamp blink on and off at 0 5 second intervals Cause Indoor Outdoor unit Miswiring or trouble of serial signal Left lamp 2 time blink Cause Indoor unit Trouble of room temperature indoor coil thermistor Left lamp 3 time blink Cause Indoor unit Trouble of indoor fan motor Left lamp 4 time blink Cause Indoor unit Trouble of indoor unit control system Lef...

Page 20: ...ompressor Refer to outdoor unit service manual Check the stop valve 6 Outdoor thermistors Left lamp blinks 6 time blink 2 5 second OFF The outdoor thermistors short or open circuit during the compressor operation Refer to Check of outdoor thermistor Refer to outdoor unit service manual 7 Outdoor control sys tem Left lamp blinks 7 time blink 2 5 second OFF It cannot properly read data in the nonvol...

Page 21: ...a tester Temperature 10 30 C Color of the lead wire Normal RED BLK 262 328 Ω BLK BLK RED BLK BLK ROTOR OPERATION INDICATOR No Abnormal point Operation indicator lamp Symptom Condition Remedy 1 MXZ type Operation mode setting Left lamp lights and right lamp blinks 2 5 second OFF Outdoor unit operates but indoor unit does not operate The operation mode of the each indoor unit is differently set to C...

Page 22: ...tronic control P C board 1 Measure the voltage between CN211 and 2 Measure the voltage between CN211 and If more than 12 seconds passes after EMERGENCY OPERATION switch is pressed the voltage measured at 2 above goes 0 V DC although the indoor P C board is normal Does the voltage between CN211 and on the power P C board rise to the range of 3 to 6 V DC within 12 seconds after EMERGENCY OPERATION s...

Page 23: ...tart type within the range of 1 m 2 Yes No Reinstall the unit away from lights Attach a filter on receiving part 1 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 Howeve...

Page 24: ...wn only Measure the resistance between CN211 and of indoor fan motor connector 2 3 Yes Is the resistance 1MΩ or more Replace the fuse F11 and the indoor fan motor 3 No Replace the fuse F11 1 Measure the resistance of resistor R111 on the indoor power P C board No Replace the indoor electronic control P C board and the indoor fan motor Replace the indoor electronic control P C board Measure the res...

Page 25: ...er supply Check once more if the indoor outdoor connecting wire is not miswiring Bridge the outdoor terminal block S2 and S3 1 B 1 Miswiring may damage indoor electronic control P C board during the operation Be sure to confirm the wiring is correct before the opera tion starts Turn ON the power supply Does the LED on the inverter P C board repeat 3 6 second OFF and 0 8 sec ond ON quick blinking 3...

Page 26: ...oor terminal block S1 and S2 Confirmation of power voltage Replace the indoor electronic control P C board 2 Be careful of the residual voltage of smoothing capacitor Replace the outdoor control P C board 2 Is there any error of the indoor outdoor connecting wire such as the damage of the wire intermediate connection poor contact to the terminal block Replace the indoor outdoor connecting wire Is ...

Page 27: ...he installation condition combination of specific conditions such as antennas or wiring Check the following 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 outd...

Page 28: ...thermistor RT11 CN111 Connector to Indoor coil thermistor CN112 RT12 RT13 Vane motor CN151 12 V DC 5 V DC GND To disable Auto restart function cut the Jumper wire to JR77 Refer to 8 3 Indoor electronic control P C board Fuse F11 T3 15AL250V Varistor NR11 Emergency operation switch E O SW SW1 Indoor terminal P C board Power monitor receiver SW P C board Room temperature thermistor RT11 Indoor coil ...

Page 29: ...minal slowly Connector Sleeve Locking lever Detaching method of the terminal with locking mechanism The terminal which has the locking mechanism can be detached as shown below There are following 2 types 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 DISASSEMBLY INSTRUCTIONS 11 11 1 MS...

Page 30: ...es of the fan motor through B as shown in the Photo 3 Removing the indoor terminal P C board indoor elec tronic control P C board and power monitor receiver SW P C board 8 Remove the screw of the terminal block and remove the earth wire connected to the electrical box from the indoor electronic control P C board 9 Remove the power monitor receiver SW P C board holder from the electrical box 10 Unh...

Page 31: ...l cover Refer to section 2 4 Disconnect the following connectors on the electronic control P C board CN151 Vane motor 5 Pull out the drain hose from the nozzle assembly and remove the nozzle assembly Removing the vane motor 6 Cut the fixing band of the vane motor wire Photo 6 7 Remove the screws of the vane motor and remove the vane motor Photo 5 8 Disconnect the connector from the vane motor 31 P...

Page 32: ...otor band and remove the 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 9 Remove the screws fixing the left side of the heat exchanger 10 Lift the heat exchanger and pull out the line flow fan to the lower left When attaching the line flow fan screw the line flow fan s...

Page 33: ... position Do not pull the lead wire when removing the indoor coil thermistor Holder shape Clip shape When fixing the indoor coil thermistor to the clip shape holder shape part the lead wire should point down 1 Set the indoor coil thermistor in the center of the clip shape part 2 Check the marked mounting position 3 Mount the clip shape part Position and procedure for mounting the clip shape part A...

Page 34: ...ht 2018 MITSUBISHI ELECTRIC CORPORATION Published Oct 2018 No OBH822 Made in Japan Specifications are subject to change without notice HEAD OFFICE TOKYO BUILDING 2 7 3 MARUNOUCHI CHIYODA KU TOKYO 100 8310 JAPAN ...

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