Mitsubishi Electric MSZ-HR25VF - E1 Service Manual Download Page 33

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Room temperature thermistor (RT11)

Indoor coil thermistor (RT12, RT13)

Temperature (°C)

Resistance (kΩ)

Fuse (F11)

T3.15AL250V

Varistor (NR11)

Connector to indoor electronic

control P.C. board (CN20A)

5 VDC

12 VDC

GND

Connector to Indoor fan

motor (CN211)

Reactor (L111)

Connector to

Terminal block

(CN201)

(+)3-6 VDC

15 VDC

(-) GND

(High voltage DC)

325 VDC

(+)0 or 15 VDC

Room temperature thermistor RT11 (CN111)

Connector to

Indoor coil ther-

mistor RT12, RT13

(CN112)

Vane motor

(CN151)

Connector to indoor power

P.C. board (CN10A)

12V DC

5V DC

Emergency operation

switch (E.O. SW) (SW1)

MSZ-HR60VF MSZ-HR71VF

1. Indoor power P.C. board

2. Indoor electronic control P.C. board

GND

Timer short mode

point (Refer to 8-1.)

OBH822B

Summary of Contents for MSZ-HR25VF - E1

Page 1: ...XZ HA VF Series OBH828 PARTS CATALOG OBB822 CONTENTS 1 TECHNICAL CHANGES 2 2 PART NAMES AND FUNCTIONS 3 3 SPECIFICATION 4 4 NOISE CRITERIA CURVES 6 5 OUTLINES AND DIMENSIONS 8 6 WIRING DIAGRAM 9 7 REFRIGERANT SYSTEM DIAGRAM 10 8 SERVICE FUNCTIONS 11 9 MICROPROCESSOR CONTROL 13 10 TROUBLESHOOTING 17 11 DISASSEMBLY INSTRUCTIONS 34 SERVICE MANUAL MSZ HR25VF Revision B MSZ HR60 71VF ER1 have been adde...

Page 2: ...odel 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 involving the electric parts w...

Page 3: ...ntroller 2 Remote controller Heat exchanger Air inlet Front panel Air filter Air outlet Operation indicator lamp Emergency operation switch Remote control receiving section Air cleaning filter Horizontal vane Remote controller MSZ HR60VF MSZ HR71VF Air inlet Heat exchanger Front panel Air filter Air cleaning filter Horizontal vane Air outlet Remote control receiving section Operation indicator lam...

Page 4: ... High dB A 43 46 45 45 High 37 38 39 40 Med 30 31 34 36 Low 21 22 24 28 Heating Super High 43 44 46 47 High 37 37 40 41 Med 30 30 32 34 Low 21 21 24 27 Fan speed Cooling Super High rpm 1 120 1 280 1 130 1 130 High 900 950 970 1 000 Med 730 750 830 860 Low 550 550 630 660 Heating Super High 1 150 1 180 1 150 1 220 High 920 920 970 1 000 Med 730 730 770 800 Low 520 520 600 640 Fan speed regulator 4 ...

Page 5: ...per High dB A 50 50 High 44 44 Med 38 38 Low 33 33 Heating Super High dB A 50 50 High 44 44 Med 38 38 Low 33 33 Fan speed Cooling Super High rpm 1 220 1 220 High 1 000 1 000 Med 850 850 Low 730 730 Heating Super High rpm 1 220 1 220 High 1 070 1 070 Med 880 880 Low 750 750 Fan speed regulator 4 4 Remote controller model RH18A RH18A NOTE Test conditions are based on ISO 5151 Cooling Indoor Dry bulb...

Page 6: ... 70 BAND CENTER FREQUENCIES Hz COOLING FUNCTION SPL dB A LINE 45 HEATING 47 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 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 ...

Page 7: ... High FAN SPEED HEATING 50 50 NC 10 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 OCTAVE BAND SOUND PRESSURE LEVEL dB re 0 0002 MICRO BAR BAND CENTER FREQUENCIES Hz COOLING FUNCTION SPL dB A LINE Super High FAN SPEED HEATING 50 50 NC 10 INDOOR UNIT WALL MICROPHONE 0 8m 1m Test conditions Cooling Dry bulb temperature 27 C Wet bulb temperature 19 C...

Page 8: ...53 100 116 5 133 175 5 PIPING INSULATION φ50 O D LIQUID LINE φ8 0 50m FLARED CONNECTION φ6 35 GAS LINE φ12 0 45m FLARED CONNECTION φ12 7 DRAIN HOSE INSULATION φ29 CONNECTED PART φ16 O D IN CASE OF LEFT LEFT REAR OR LEFT UNDER PIPING USING SPACER MIN 125 5mm MIN 75mm MIN 40mm MIN 7mm MIN 89 5mm DRAIN HOSE PIPING AIR OUT AIR IN 26 11 OBLONG HOLE 11 20 OBLONG HOLE INSTALLATION PLATE INDOOR UNIT WALL ...

Page 9: ...9 MSZ HR25VF MSZ HR35VF MSZ HR42VF MSZ HR50VF WIRING DIAGRAM 6 MSZ HR60VF MSZ HR71VF OBH822B ...

Page 10: ... coil thermistor RT12 Indoor coil thermistor RT13 Refrigerant flow in cooling Refrigerant flow in heating MSZ HR42VF MSZ HR50VF MSZ HR60VF MSZ HR71VF Indoor heat exchanger Flared connection Room temperature thermistor RT11 Flared connection Refrigerant pipe ø9 52 with heat insulator Refrigerant pipe ø6 35 with heat insulator Indoor coil thermistor RT12 Indoor coil thermistor RT13 Refrigerant flow ...

Page 11: ...oor 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 been restored The P C board has the print ...

Page 12: ...erated 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 tripping OFF due to the rush of starting c...

Page 13: ...ation Operation state Room temperature HR25 35 42 50VF HR60 71VF The unit is operating to reach the set temperature About 2 C or more away from set temperature The room temperature is approaching the set tem perature About 1 to 2 C from set temperature Standby mode only during multi system operation Lit Blinking Not lit Temperature buttons Signal transmitting section ECONO COOL button VANE control...

Page 14: ...p operate 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 OFF ON stop operate button OPERATION INDICATOR lamp of the indoor unit turns on with a beep tone 2 Select HEAT mode with OPERATI...

Page 15: ...itioner 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 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 OFF ON stop operate button is pressed POWER OFF b When the operation is stoppe...

Page 16: ...nutes 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 emergency operation In the test run or emer...

Page 17: ...icate an abnormality 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 Re...

Page 18: ...ilure mode again according to Setting up the failure mode recall function mentioned above Press OFF ON stop operate 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 ...

Page 19: ...door 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 fan is operated Refer...

Page 20: ...1 blink on and off at 0 5 second intervals Cause Indoor Outdoor unit Miswiring or trouble of serial signal Left Upper lamp 1 2 time blink Cause Indoor unit Trouble of room temperature indoor coil thermistor Left Upper lamp 1 3 time blink Cause Indoor unit Trouble of indoor fan motor Left Upper lamp 1 4 time blink Cause Indoor unit Trouble of indoor unit control system Left Upper lamp 1 5 time blin...

Page 21: ...al Check the stop valve 6 Outdoor thermistors Left Upper lamp blinks 1 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 Upper lamp blinks 1 7 time blink 2 5 second OFF It cannot properly read data in the nonvolatile memory of the inverter...

Page 22: ...Y 262 328 Ω HR60 71 RED BLU HR25 35 42 50 HR60 71 No Abnormal point Operation indicator lamp Symptom Condition Remedy 1 MXZ type Operation mode setting Left Upper lamp lights and right lamp blinks 1 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 COOL includes DRY FAN and HEAT at the same time the operation mode...

Page 23: ...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 meas ured at 2 above goes 0 V DC although the indoor P C board is normal Does the voltage between CN211 and on the indoor electronic control P C board rise to the range of 3 to 6 V DC within 12 seconds after EMERGENCY OPERATION switch is press...

Page 24: ...oltage between CN211 and 2 Measure the voltage between CN211 and If more than 12 seconds passes after EMERGENCY OPERATION switch is pressed the voltage meas ured at 2 above goes 0 V DC although the indoor P C board is normal Does the voltage between CN211 and on the indoor power P C board rise to the range of 3 to 6 V DC within 12 seconds after EMERGENCY OPERATION switch is pressed Replace the ind...

Page 25: ...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 OFF ON stop operate button on the remote control ler is pressed However...

Page 26: ...easure 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 resistance o...

Page 27: ...e indoor fan motor Replace the power P C board Measure the resistance of the vane motor coil Refer to 10 5 Short circuit Replace the vane motor and the indoor electronic control P C board 1 The fan motor connector s lead wire is red whereas is black 2 Connect of the tester to fan motor connector s lead wire and to lead wire otherwise the resistance cannot be measured properly 3 Please replace the ...

Page 28: ...wiring Bridge the outdoor terminal block S2 and S3 1 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 Yes No Lit or not lit Replace the inverter P C board 2 2 Be careful of the ...

Page 29: ...ink continuously 6 minutes after the emergency operation starts No Does the outdoor LED light up Replace the indoor power P C board Yes Does the outdoor LED blink 6 times Yes Confirm that the thermostat is OFF and wiring is not loose No Does DC 6 V or more occur between indoor terminal block S2 and S3 Yes Replace the outdoor inverter P C board 1 No Replace the indoor power P C board 1 Electric cha...

Page 30: ...rminal block S2 and S3 1 Turn ON the power supply Turn OFF the power supply Remove the bridge between outdoor terminal block S2 and S3 Turn ON the power supply Is there amplitude of 10 to 20 V DC between outdoor terminal block S2 and S3 Confirmation of serial signal Yes Replace the inverter P C board 2 Yes Does the LED on the outdoor control P C board repeat 3 6 second OFF and 0 8 second ON quick ...

Page 31: ...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 32: ...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 33: ...11 Reactor L111 Connector to Terminal block CN201 3 6 VDC 15 VDC GND High voltage DC 325 VDC 0 or 15 VDC Room temperature thermistor RT11 CN111 Connector to Indoor coil ther mistor RT12 RT13 CN112 Vane motor CN151 Connector to indoor power P C board CN10A 12V DC 5V DC Emergency operation switch E O SW SW1 MSZ HR60VF MSZ HR71VF 1 Indoor power P C board 2 Indoor electronic control P C board GND Time...

Page 34: ...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 35: ...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 36: ... 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 36 Ph...

Page 37: ...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 38: ...ew caps on the panel and remove the screws of the panel 2 Pull the panel slightly toward you and then remove the panel by pushing it upward 38 11 2 MSZ HR60VF MSZ HR71VF NOTE Turn OFF the power supply before disassembly Photo 1 Figure 1 Screw of the panel Horizontal vane Screws of the panel Front panel OBH822B ...

Page 39: ...move the screw of the electrical cover and remove the electrical cover 10 Disconnect the CN211 Indoor fan motor from the indoor power P C board 11 Remove the upper catch of the electrical box and pull out the electrical box NOTE To attach the electrical box pass the wires connecting the indoor power P C board and the indoor electronic control P C board through Pass the lead wires of the fan motor ...

Page 40: ...k side of the control P C board holder 5 Unhook the catches of the control P C board holder and open the control P C board holder 6 Remove the indoor electronic control P C board from the control P C board holder 4 Removing the vane motor 1 Remove the panel Refer to section 1 Remove the corner box 2 Remove the control P C board holder water cover and the electrical box Refer to section 2 3 Pull ou...

Page 41: ...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 and upper right 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 scre...

Page 42: ...ip 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 About the same length 42 Copyright 2018 MITSUBISHI ELECTRIC CORPORATION Issued Feb 2020 No OBH822 REVISED EDITION B Issued Jan 2020 No OBH822 REVISED ...

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