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INDOOR UNIT
SERVICE MANUAL
Models
MSZ-HR25VF
MSZ-HR35VF
MSZ-HR42VF
MSZ-HR50VF
MSZ-HR60VF
MSZ-HR71VF
MSZ-HR25VF
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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
PARTS CATALOG (OBB822)
Revision B:
• MSZ-HR60/71VF-
have been added.
ER1
OBH822 REVISED EDITION-A is void.
No. OBH822
REVISED EDITION-B
Outdoor unit service manual
MUZ-HR∙VF Series (OBH823)
MXZ-HA∙VF Series (OBH828)
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Table of Contents
Related Manuals for Mitsubishi Electric MUZ-HR VF Series
Summary of Contents for Mitsubishi Electric MUZ-HR VF Series
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Page 1: Table Of Contents
Revision B: • MSZ-HR60/71VF- have been added. OBH822 REVISED EDITION-A is void. INDOOR UNIT No. OBH822 REVISED EDITION-B SERVICE MANUAL Models MSZ-HR25VF MSZ-HR35VF MSZ-HR42VF MSZ-HR50VF MSZ-HR60VF MSZ-HR71VF Outdoor unit service manual MUZ-HR∙VF Series (OBH823) MXZ-HA∙VF Series (OBH828) CONTENTS 1. TECHNICAL CHANGES ······························2 2. -
Page 2: Technical Changes
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. -
Page 3: Part Names And Functions
PART NAMES AND FUNCTIONS MSZ-HR25VF MSZ-HR35VF MSZ-HR42VF MSZ-HR50VF Heat exchanger Front panel Air inlet Air filter Air cleaning filter (Silver-ionized air purifier filter, option) Horizontal vane Air outlet Operation indicator lamp Remote control receiving section Emergency operation switch Remote controller MSZ-HR60VF MSZ-HR71VF Heat exchanger Front panel... -
Page 4: Specification
SPECIFICATION MSZ-HR25VF MSZ-HR35VF MSZ-HR42VF MSZ-HR50VF Indoor model 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 0.27 0.30 0.36 Current *1... - Page 5 Indoor model MSZ-HR60VF MSZ-HR71VF 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 *1 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 6: Noise Criteria Curves
NOISE CRITERIA CURVES MSZ-HR25VF MSZ-HR35VF 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 FUNCTION SPL(dB(A)) - Page 7 MSZ-HR60VF MSZ-HR71VF FUNCTION SPL(dB(A)) FUNCTION SPL(dB(A)) FAN SPEED LINE FAN SPEED 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 8000 BAND CENTER FREQUENCIES, Hz...
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Page 8: Outlines And Dimensions
OUTLINES AND DIMENSIONS MSZ-HR25VF MSZ-HR35VF MSZ-HR42VF MSZ-HR50VF Unit: mm Unit: mm MSZ-HR60VF MSZ-HR71VF 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 AIR OUT (53) 175.5... -
Page 9: Wiring Diagram
WIRING DIAGRAM MSZ-HR25VF MSZ-HR35VF MSZ-HR42VF MSZ-HR50VF MSZ-HR60VF MSZ-HR71VF OBH822B... -
Page 10: Refrigerant System Diagram
REFRIGERANT SYSTEM DIAGRAM MSZ-HR25VF Unit: mm MSZ-HR35VF 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 RT13... -
Page 11: Service Functions
SERVICE FUNCTIONS MSZ-HR25VF MSZ-HR35VF MSZ-HR42VF MSZ-HR50VF MSZ-HR60VF MSZ-HR71VF 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.) • The set time for the ON/OFF timer can be reduced to 1 second for each minute. •... - Page 12 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.
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Page 13: Microprocessor Control
MICROPROCESSOR CONTROL MSZ-HR25VF MSZ-HR35VF MSZ-HR42VF MSZ-HR50VF MSZ-HR60VF MSZ-HR71VF 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 Temperature buttons ECONO COOL button... - Page 14 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 15 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 oth- ers for heating, the operation mode of the indoor unit that operates first is selected.
- Page 16 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 17: Troubleshooting
TROUBLESHOOTING MSZ-HR25VF MSZ-HR35VF MSZ-HR42VF MSZ-HR50VF MSZ-HR60VF MSZ-HR71VF 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 18 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 19 2. Table of indoor unit failure mode recall function Left/Upper lamp of Abnormal point OPERATION INDI- Condition Remedy (Failure mode) CATOR 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 20 10-3. INSTRUCTION OF TROUBLESHOOTING Start Indoor unit operates. Indoor unit operates. Indoor unit does OPERATION INDICATOR Outdoor unit does Outdoor unit does not receive lamp on indoor unit is not operate normally. not operate. the signal from blinking ON and OFF. remote controller.
- Page 21 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 22 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 23 10-6. TROUBLESHOOTING FLOW A Check of indoor fan motor <HR25/35/42/50VF> 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.
- Page 24 <HR60/71VF> 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.
- Page 25 B Check of remote controller and indoor electronic control P.C. board Check if the remote controller is exclusive for this air conditioner. Press OFF/ON (stop/operate) button on the remote controller. Is LCD display on the remote controller Replace the batteries. (Refer to 10-1.4.) visible? (Not clear) Remove the batteries, then set them back...
- Page 26 C Check of indoor P.C. board and indoor fan motor HR25/35/42/50VF 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 27 HR60/71VF 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 28 D How to check miswiring and serial signal error NOTE: Refer to the outdoor unit service manual. HR25/35/42/50VF Turn OFF the power supply. Is there rated voltage in the power supply? Check the power supply. Turn ON the power supply. Is there rated voltage between outdoor terminal block S1 and S2? Check the wiring.
- Page 29 HR60/71VF 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 equip- ment. • Turn OFF the power supply and then turn ON again.
- Page 30 MXZ Type <HR25/35/42/50VF> LED indication for communication status Communication status is indicated by the LED. Turn OFF the power supply. Unit status 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 31 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 32 10-7. TEST POINT DIAGRAM AND VOLTAGE 1. Indoor electronic control P.C. board, indoor terminal P.C. board and power monitor receiver SW P.C. board MSZ-HR25VF MSZ-HR35VF MSZ-HR42VF MSZ-HR50VF Indoor electronic control P.C. board Connector to Indoor coil thermistor (CN112) RT12, RT13 Connector to Indoor Indoor terminal P.C.
- Page 33 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 motor (CN211) Reactor (L111) 325 VDC (+)0 or 15 VDC (-) GND (+)3-6 VDC (High voltage DC)
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Page 34: 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 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. - Page 35 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 receiver SW P.C. board and the electrical box Coil thermistor <Removing the electrical box> (1) Remove the panel.
- Page 36 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 37 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 38 11-2. 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 39 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 40 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 41 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 42 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: Feb. 2020. No. OBH822 REVISED EDITION-B Issued: Jan. 2020. No. OBH822 REVISED EDITION-A Published: Oct.