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INDOOR UNIT
SERVICE MANUAL
Models
MSZ-HR25VF
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MSZ-HR35VF
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MSZ-HR42VF
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MSZ-HR50VF
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MSZ-HR60VF
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MSZ-HR71VF
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MSZ-HR25VF
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Revision F:
• MSZ-HR60/71VFK-
MSZ-HR60/71VF-
OBH822 REVISED EDITION-E is void.
MSZ-HR25VFK
MSZ-HR35VFK
MSZ-HR42VFK
MSZ-HR50VFK
MSZ-HR60VFK
E3
MSZ-HR71VFK
E3
Outdoor unit service manual
MUZ-HR∙VF Series (OBH823)
MXZ-HA∙VF Series (OBH828)
CONTENTS
1. TECHNICAL CHANGES ······························3
2. PART NAMES AND FUNCTIONS ··················4
3. SPECIFICATION ········································5
4. NOISE CRITERIA CURVES ··························7
5. OUTLINES AND DIMENSIONS ·····················9
6. WIRING DIAGRAM ··································· 10
7. REFRIGERANT SYSTEM DIAGRAM ··········· 15
8. SERVICE FUNCTIONS ······························ 16
9. MICROPROCESSOR CONTROL ················· 19
10. TROUBLESHOOTING ······························· 23
11. DISASSEMBLY INSTRUCTIONS ················· 42
PARTS CATALOG (OBB822)
and
ER1
have been added.
ER2
No. OBH822
REVISED EDITION-F
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Table of Contents
Related Manuals for Mitsubishi Electric MSZ-HR25VFK-ER1
Summary of Contents for Mitsubishi Electric MSZ-HR25VFK-ER1
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Page 1: Table Of Contents
Revision F: • MSZ-HR60/71VFK- MSZ-HR60/71VF- have been added. OBH822 REVISED EDITION-E is void. INDOOR UNIT No. OBH822 REVISED EDITION-F SERVICE MANUAL Models MSZ-HR25VF MSZ-HR25VFK MSZ-HR35VF MSZ-HR35VFK MSZ-HR42VF MSZ-HR42VFK MSZ-HR50VF MSZ-HR50VFK MSZ-HR60VF MSZ-HR60VFK MSZ-HR71VF MSZ-HR71VFK Outdoor unit service manual MUZ-HR∙VF Series (OBH823) MXZ-HA∙VF Series (OBH828) CONTENTS 1. - Page 2 Use the specified refrigerant only 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.
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Page 3: Technical Changes
TECHNICAL CHANGES MSZ-HR25VF - MSZ-HR35VF - MSZ-HR42VF - MSZ-HR50VF - MSZ-HR60VF - MSZ-HR71VF - 1. New model MSZ-HR60VF - MSZ-HR60VF - MSZ-HR71VF - MSZ-HR60VF - 1. Model name has been changed. MSZ-HR25VF - MSZ-HR25VF - MSZ-HR35VF - MSZ-HR35VF - MSZ-HR42VF - MSZ-HR42VF - MSZ-HR50VF - MSZ-HR50VF -... -
Page 4: Part Names And Functions
PART NAMES AND FUNCTIONS MSZ-HR25VF MSZ-HR35VF MSZ-HR42VF MSZ-HR50VF MSZ-HR25VFK MSZ-HR35VFK MSZ-HR42VFK MSZ-HR50VFK (Only for MSZ-HR•VFK) (Only for MSZ-HR25/35/42/50VF- MSZ-HR25/35/42/50VFK- (Other models) MSZ-HR60VF MSZ-HR71VF MSZ-HR60VFK MSZ-HR71VFK (Only for MSZ-HR•VFK) (Only for MSZ-HR60/71VF- MSZ-HR60/71VFK- (Other models) ACCESSORIES MSZ-HR25VF MSZ-HR25VFK MSZ-HR35VF MSZ-HR35VFK Model MSZ-HR42VF MSZ-HR42VFK MSZ-HR50VF MSZ-HR50VFK MSZ-HR60VF MSZ-HR60VFK MSZ-HR71VF MSZ-HR71VFK Installation plate... -
Page 5: Specification
SPECIFICATION MSZ-HR25VF MSZ-HR35VF MSZ-HR42VF MSZ-HR50VF Indoor model MSZ-HR25VFK MSZ-HR35VFK MSZ-HR42VFK MSZ-HR50VFK Power supply Single phase 230 V, 50 Hz Cooling Power input Heating Cooling 0.20 0.27 0.30 0.36 Running current *1 Heating 0.20 0.27 0.30 0.36 Model RC0J30-CV RC0J30-CV RC0J30-CV RC0J30-CV Cooling 0.20... - Page 6 MSZ-HR60VF MSZ-HR71VF Indoor model MSZ-HR60VFK MSZ-HR71VFK Power supply Single phase 230 V, 50 Hz Single phase 230 V, 50 Hz Cooling Power input *1 Heating Cooling 0.50 0.50 Running current Heating 0.50 0.50 Model RC0J40-SA RC0J40-SA Cooling 0.50 0.50 Current *1 Heating 0.50 0.50...
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Page 7: Noise Criteria Curves
NOISE CRITERIA CURVES MSZ-HR25VF MSZ-HR35VF MSZ-HR25VFK MSZ-HR35VFK FUNCTION SPL(dB(A)) LINE FUNCTION SPL(dB(A)) LINE COOLING COOLING HEATING HEATING NC-70 NC-70 NC-60 NC-60 NC-50 NC-50 NC-40 NC-40 NC-30 NC-30 NC-20 NC-20 1000 2000 4000 8000 1000 2000 4000 8000 BAND CENTER FREQUENCIES, Hz BAND CENTER FREQUENCIES, Hz MSZ-HR42VF MSZ-HR50VF... - Page 8 MSZ-HR60VF MSZ-HR71VF MSZ-HR60VFK MSZ-HR71VFK FAN SPEED FUNCTION SPL(dB(A)) LINE FAN SPEED FUNCTION SPL(dB(A)) LINE COOLING COOLING Super High Super High HEATING HEATING NC-70 NC-70 NC-60 NC-60 NC-50 NC-50 NC-40 NC-40 NC-30 NC-30 NC-20 NC-20 NC-10 NC-10 1000 2000 4000 8000 1000 2000 4000...
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Page 9: Outlines And Dimensions
OUTLINES AND DIMENSIONS MSZ-HR25VF MSZ-HR35VF MSZ-HR42VF MSZ-HR50VF Unit: mm MSZ-HR25VFK MSZ-HR35VFK MSZ-HR42VFK MSZ-HR50VFK Unit: mm MSZ-HR60VF MSZ-HR71VF MSZ-HR60VFK MSZ-HR71VFK INSTALLATION PLATE 26×11 OBLONG HOLE 11×20 OBLONG HOLE INDOOR UNIT 403.5 75.5 WALL HOLE AIR IN 403.5 INSTALLATION PLATE PIPING MIN 40mm MIN 75mm DRAIN HOSE 116.5... -
Page 10: Wiring Diagram
WIRING DIAGRAM MSZ-HR25VF - MSZ-HR35VF - MSZ-HR42VF - MSZ-HR50VF - MSZ-HR25VF - MSZ-HR35VF - MSZ-HR42VF - MSZ-HR50VF - OBH822F... - Page 11 MSZ-HR25VF - MSZ-HR35VF - MSZ-HR42VF - MSZ-HR50VF - MSZ-HR25VFK - MSZ-HR35VFK - MSZ-HR42VFK - MSZ-HR50VFK - OBH822F...
- Page 12 MSZ-HR25VFK - MSZ-HR35VFK - MSZ-HR42VFK - MSZ-HR50VFK - MSZ-HR60VF - MSZ-HR71VF - OBH822F...
- Page 13 MSZ-HR60VF - MSZ-HR71VF - PARÇA ADI SİGORTA (T3.15AL250V) REAKTÖR FAN MOTORU KANAT MOTORU DIŞ (YATAY) ÜNİTEYE VARİSTÖR ODA SICAKLIK TERMİSTÖRÜ İÇ ÜNİTE GÜÇ BORU SICAKLIK KARTI TERMİSTÖRÜ(ANA) BORU SICAKLIK TERMİSTÖRÜ(YARDIMCI) NOTLAR: TERMİNAL BLOĞU 1. Dış ünite elektronik kablolaması için dış ünite elektronik kablo devre şemasını...
- Page 14 MSZ-HR60VFK - MSZ-HR71VFK - MSZ-HR60VFK - MSZ-HR71VFK - PARÇA ADI SİGORTA (T3.15AL250V) REAKTÖR FAN MOTORU KANAT MOTORU DIŞ (YATAY) ÜNİTEYE VARİSTÖR ODA SICAKLIK İÇ ÜNİTE GÜÇ TERMİSTÖRÜ BORU SICAKLIK KARTI TERMİSTÖRÜ(ANA) BORU SICAKLIK NOTLAR: TERMİSTÖRÜ(YARDIMCI) 1. Dış ünite elektronik kablolaması TERMİNAL BLOĞU için dış...
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Page 15: Refrigerant System Diagram
REFRIGERANT SYSTEM DIAGRAM MSZ-HR25VF MSZ-HR35VF Unit: mm MSZ-HR25VFK MSZ-HR35VFK Refrigerant pipe ø9.52 Refrigerant pipe ø9.52 (with heat insulator) (with heat insulator) Indoor coil Indoor coil Indoor Indoor thermistor thermistor heat heat RT12 RT12 exchanger exchanger Flared connection Flared connection Indoor coil Indoor coil thermistor thermistor... -
Page 16: Service Functions
SERVICE FUNCTIONS MSZ-HR25VF MSZ-HR35VF MSZ-HR42VF MSZ-HR50VF MSZ-HR60VF MSZ-HR71VF MSZ-HR25VFK MSZ-HR35VFK MSZ-HR42VFK MSZ-HR50VFK MSZ-HR60VFK MSZ-HR71VFK 8-1. TIMER SHORT MODE For service, the following set time can be shortened by bridging the timer short mode point on the electronic control P.C. board. (Refer to 10-7.) •... - Page 17 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 before the shutoff of the main power.
- Page 18 Wi-Fi service. • This Wi-Fi interface should not be installed and connected to Wi-Fi interface any Mitsubishi Electric system which is to provide applica- tion critical cooling or heating. • At the time of relocation or disposal, reset the Wi-Fi interface Wi-Fi interface introduction to the factory default.
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Page 19: Microprocessor Control
MICROPROCESSOR CONTROL MSZ-HR25VF MSZ-HR35VF MSZ-HR42VF MSZ-HR50VF MSZ-HR60VF MSZ-HR71VF MSZ-HR25VFK MSZ-HR35VFK MSZ-HR42VFK MSZ-HR50VFK MSZ-HR60VFK MSZ-HR71VFK WIRELESS REMOTE CONTROLLER Signal transmitting section Distance of signal: About 6 m Beep(s) is (are) heard from the indoor unit when the signal is received. Battery replacement indicator Operation display section OFF/ON (stop/operate) button FAN speed control button... - Page 20 9-1. COOL ( ) OPERATION (1) Press OFF/ON (stop/operate) 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 (TOO WARM or TOO COOL button) to select the set temperature. The setting range is 16 - 31°C.
- Page 21 9-5. MULTI SYSTEM OPERATION FOR MULTI SYSTEM AIR CONDITIONER OUTDOOR UNIT: MXZ series Multi system air conditioner can connect 2 or more indoor units with 1 outdoor unit. • When you try to operate 2 or more indoor units with 1 outdoor unit simultaneously, one for the cooling and the others for heating, the operation mode of the indoor unit that operates first is selected.
- Page 22 9-7. TIMER OPERATION (ON/OFF TIMER) 1. How to set the timer (1) Press STOP/OPERATE/ (OFF/ON) button to start the air conditioner. (2) Select the timer mode by pressing the button during operation. Each time this button is pressed, the timer mode is changed in sequence: (OFF TIMER) →...
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Page 23: Troubleshooting
TROUBLESHOOTING MSZ-HR25VF MSZ-HR35VF MSZ-HR42VF MSZ-HR50VF MSZ-HR60VF MSZ-HR71VF MSZ-HR25VFK MSZ-HR35VFK MSZ-HR42VFK MSZ-HR50VFK MSZ-HR60VFK MSZ-HR71VFK 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. - Page 24 10-2. FAILURE MODE RECALL FUNCTION Outline of the function This air conditioner can memorize the abnormal condition which has occurred once. Even though LED indication listed on the troubleshooting check table (10-4.) disappears, the memorized failure details can be recalled. 1.
- Page 25 2. Table of indoor unit failure mode recall function Left/Upper lamp of Abnormal point OPERATION Condition Remedy (Failure mode) INDICATOR lamp *1 Not lit Normal — — The room temperature thermistor short or 1-time blink every Room tempera- Refer to the characteristics of the room temperature open circuit is detected every 8 seconds dur- 0.5-second ture thermistor...
- Page 26 10-3. INSTRUCTION OF TROUBLESHOOTING *2 There is possibility that diesel explosion may occur due to the air mixed in the refrigerant circuit. 1. Check of the unit *1 "Test Run operation" means the First, ensure that there are no leakage points on the valves, flare connec- operation within 30 minutes after tions, etc.
- Page 27 2. Check of Wi-Fi interface (MSZ-HR·VFK) Follow the procedure below if the air conditioner cannot be monitored or controlled with a device such as a smartphone. Start There is a problem in communication between the air conditioner and Is the UNIT LED on the Wi-Fi interface blinking? the Wi-Fi interface.
- Page 28 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 blinks. HR25/35/42/50VF HR60/71VF OPERATION INDICATOR...
- Page 29 OPERATION INDICATOR HR25/35/42/50 HR60/71 Blinking Not lit Abnormal Operation indicator lamp Symptom Condition Remedy point Left/Upper lamp lights and right lamp blinks. The operation mode of the each indoor unit is MXZ type Outdoor unit differently set to COOL (includes DRY, FAN) •...
- Page 30 10-6. TROUBLESHOOTING FLOW A Check of indoor fan motor HR25/35/42/50 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 the emergency operation switch.
- Page 31 HR60/71 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 the emergency operation switch.
- Page 32 C Check of indoor P.C. board and indoor fan motor HR25/35/42/50 Turn OFF the power supply. Remove indoor fan motor connector CN211 Measure the resistance of indoor fan Short circuit: and vane motor connector CN151 from the motor. Replace the indoor fan motor. indoor electronic control P.C.
- Page 33 HR60/71 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. Replace the indoor fan motor. electronic control P.C. board and turn ON Refer to 10-5.
- Page 34 D How to check miswiring and serial signal error NOTE: Refer to the outdoor unit service manual. HR25/35/42/50 Turn OFF the power supply. Is there rated voltage in the power supply? Check the power supply. Turn ON the power supply. Check the wiring.
- Page 35 HR60/71 Turn the power supply OFF. Is there rated voltage in the power supply? Check the power supply. Check for incorrect indoor-outdoor connecting wiring. • Turn OFF inverter-controlled lighting equipment. • Turn OFF the power supply and then turn ON again.
- Page 36 MXZ Type HR25/35/42/50 LED indication for communication status Communication status is indicated by the LED. Unit status Turn OFF the power supply. Blinking: Normal communication Lit: Abnormal communication or not connected Is there rated voltage in the power supply? Check the power supply. Pattern 1 and 2 is repeatedly displayed alternately.
- Page 37 E Electromagnetic noise enters into TV sets or radios Is the unit earthed? Earth the unit. Is the distance between the antennas Extend the distance between the antennas and and the indoor unit within 3 m, or is the the indoor unit, and/or the antennas and the distance between the antennas and the outdoor unit.
- Page 38 10-7. TEST POINT DIAGRAM AND VOLTAGE MSZ-HR25VF MSZ-HR35VF MSZ-HR42VF MSZ-HR50VF 1. Indoor electronic control P.C. board, indoor terminal P.C. board and power monitor receiver SW P.C. board Indoor electronic control P.C. board Connector to Indoor coil thermistor (CN112) RT12, RT13 Connector to Indoor Indoor terminal P.C.
- Page 39 MSZ-HR25VFK MSZ-HR35VFK MSZ-HR42VFK MSZ-HR50VFK 1. Indoor electronic control P.C. board, indoor terminal P.C. board and power monitor receiver SW P.C. board Indoor electronic control P.C. board Connector to Indoor coil thermistor (CN112) RT12, RT13 Connector to Indoor Indoor terminal P.C. board Vane motor(CN151) fan motor (CN211) Resistor (R111)
- Page 40 MSZ-HR60VF - MSZ-HR71VF - 1. Indoor power P.C. board Connector to indoor electronic control P.C. board (CN20A) 12 VDC 5 VDC Connector to Terminal block (CN201) Fuse (F11) T3.15AL250V Varistor (NR11) Connector to Indoor fan Reactor (L111) motor (CN211) 325 VDC (+)0 or 15 VDC (-) GND (+)3-6 VDC...
- Page 41 MSZ-HR60VF - MSZ-HR71VF - MSZ-HR60VFK- MSZ-HR71VFK- 1. Indoor power P.C. board Connector to indoor electronic control P.C. board (CN20A) 12 VDC 5 VDC Connector to Terminal block (CN201) Fuse (F11) T3.15AL250V Varistor (NR11) Connector to Indoor fan Reactor (L112) motor (CN211) 325 VDC (+)0 or 15 VDC (-) GND...
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Page 42: Disassembly Instructions
DISASSEMBLY INSTRUCTIONS <Detaching method of the terminal with locking mechanism> The terminal which has the locking mechanism can be detached as shown below. There are 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. - Page 43 OPERATING PROCEDURE PHOTOS/FIGURES 2. Removing the indoor terminal P.C. board, indoor Photo 2 Tab of the electronic control P.C. board, and power monitor earth wire Water cover Wires of indoor receiver SW P.C. board and the electrical box coil thermistor <Removing the electrical box>...
- Page 44 OPERATING PROCEDURE PHOTOS/FIGURES 3. Removing the nozzle assembly and the vane Photo 5 motor <Removing the nozzle assembly> (1) Remove the panel (Refer to section 1.) and the corner box. (2) Remove the V.A. clamp, and then the indoor/outdoor connecting wire. (Refer to section 2.) (3) Remove the electrical cover.
- Page 45 OPERATING PROCEDURE PHOTOS/FIGURES 4. Removing the indoor fan motor, the indoor coil Photo 7 thermistor and the line flow fan (1) Remove the panel. (Refer to section 1.) Remove the corner box. (2) Remove the electrical box and the nozzle assembly. (Refer to section 2,3.) (3) Remove the screws fixing the motor bed.
- Page 46 11-2. MSZ-HR25VFK MSZ-HR35VFK MSZ-HR42VFK MSZ-HR50VFK NOTE: Turn OFF the power supply before disassembly. OPERATING PROCEDURE PHOTOS/FIGURES 1. Removing the panel Photo 1-1 (1) Remove the front panel. (2) Remove the screw caps of the panel. Remove the Wi-Fi interface screws of the panel. Screw of Front panel Horizontal...
- Page 47 OPERATING PROCEDURE PHOTOS/FIGURES 2. Removing the Wi-Fi interface Photo 2 Earth wire connected (1) Remove the panel (Refer to section 1.) and the corner to the indoor heat box right. exchanger Electrical box Wi-Fi interface (2) Remove the screw of the V.A. clamp. Remove the V.A.
- Page 48 OPERATING PROCEDURE PHOTOS/FIGURES 4. Removing the indoor terminal P.C. board, indoor Photo 4 Tab of the electronic control P.C. board, and power monitor earth wire Water cover receiver SW P.C. board Coil thermistor (1) Remove the panel. (Refer to section 1.) and the corner box right.
- Page 49 OPERATING PROCEDURE PHOTOS/FIGURES 5. Removing the nozzle assembly and the vane Photo 6 motor <Removing the nozzle assembly> (1) Remove the panel (Refer to section 1.) and the corner box. (2) Remove the V.A. clamp, and then the indoor/outdoor connecting wire. (3) Remove the electrical cover.
- Page 50 OPERATING PROCEDURE PHOTOS/FIGURES 6. Removing the indoor fan motor, the indoor coil Photo 8 thermistor and the line flow fan (1) Remove the panel. (Refer to section 1.) Remove the corner box. (2) Remove the electrical box and the nozzle assembly. (Refer to section 2, 3.) (3) Remove the screws fixing the motor bed.
- Page 51 11-3. MSZ-HR60VF MSZ-HR71VF NOTE: Turn OFF the power supply before disassembly. OPERATING PROCEDURE PHOTOS/FIGURES 1. Removing the panel Photo 1 (1) Remove the holizontal vane. (Figure 1) Front panel (2) Remove the screw caps on the panel and remove the screws of the panel.
- Page 52 OPERATING PROCEDURE PHOTOS/FIGURES 2. Removing the indoor power P.C. board and the Photo 2 electrical box Water cover (1) Remove the panel (refer to section 1). Remove the right corner box. Screws of the earth plate (2) Disconnect the following connectors: Screw of the <Indoor electronic control P.C.
- Page 53 OPERATING PROCEDURE PHOTOS/FIGURES 3. Removing the indoor electronic control P.C. Photo 4 board Control P.C. board holder (Inside) (1) Remove the panel. (Refer to section 1.) Remove the right corner box. Catch (2) Disconnect the following connectors: <Indoor electronic control P.C. board> CN151 (Vane motor) CN112 (Indoor coil thermistor) CN10A (To the indoor power P.C.
- Page 54 OPERATING PROCEDURE PHOTOS/FIGURES 5. Removing the indoor fan motor, the indoor coil Photo 6 thermistor and the line flow fan (1) Remove the panel. (Refer to section 1.) Remove the corner box. (2) Remove the control P.C. board holder, the water cover, the electrical box and the nozzle assembly.
- Page 55 11-4. MSZ-HR60VFK MSZ-HR71VFK NOTE: Turn OFF the power supply before disassembly. OPERATING PROCEDURE PHOTOS/FIGURES 1. Removing the panel Photo 1-1 (1) Remove the horizontal vane (Figure 1). Wi-Fi interface (2) Remove the front panel. Screw of Front panel Horizontal (3) Remove the screw caps of the panel. Remove the Wi-Fi cover vane screws of the panel.
- Page 56 OPERATING PROCEDURE PHOTOS/FIGURES 2. Removing the Wi-Fi interface Photo 2 (1) Remove the panel (Refer to section 1.) and the corner box right. Wi-Fi interface Water cover (2) Remove the screw of the V.A. clamp. Screw of Remove the V.A. clamp and the indoor/outdoor con- the electrical cover necting wire.
- Page 57 OPERATING PROCEDURE PHOTOS/FIGURES 3. Removing the indoor power P.C. board and the Photo 4 Water cover electrical box Screws of the earth plate (1) Remove the panel (refer to section 1). Remove the Screw of the corner box right . electrical cover (2) Disconnect the following connectors: <Indoor electronic control P.C.
- Page 58 OPERATING PROCEDURE PHOTOS/FIGURES 4. Removing the indoor electronic control P.C. Photo 5 board Control P.C. board holder (Inside) (1) Remove the panel. (Refer to section 1.) Remove the corner box right. Catch (2) Remove the Wi-Fi interface. (Refer to section 2 (2) to (5).) (3) Disconnect the following connectors: <Indoor electronic control P.C.
- Page 59 OPERATING PROCEDURE PHOTOS/FIGURES 6. Removing the indoor fan motor, the indoor coil Photo 7 thermistor and the line flow fan (1) Remove the panel. (Refer to section 1.) Remove the corner box. (2) Remove the Wi-Fi interface, control P.C. board holder, the water cover, the electrical box and the nozzle assembly.
- Page 60 Do not pull the lead wire when removing the indoor coil thermistor. HEAD OFFICE: TOKYO BUILDING, 2-7-3, MARUNOUCHI, CHIYODA-KU, TOKYO 100-8310, JAPAN © Copyright 2018 MITSUBISHI ELECTRIC CORPORATION Issued: Dec. 2021. No. OBH822 REVISED EDITION-F Issued: Oct. 2021. No. OBH822 REVISED EDITION-E Issued: Feb.