INDOOR UNIT
SERVICE MANUAL
Models
MSZ-FH25VE
MSZ-FH35VE
MSZ-FH50VE
MSZ-FH25VE2
MSZ-FH35VE2
MSZ-FH50VE2
NOTE:
RoHS compliant products have mark on the spec name plate.
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ER1
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E1
ER1
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E1
ER1
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E1
ER1
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CONTENTS
1. TECHNICAL CHANGES ··································· 3
2. PART NAMES AND FUNCTIONS ····················· 4
3. SPECIFICATION ················································ 5
4. NOISE CRITERIA CURVE ································ 6
5. OUTLINES AND DIMENSIONS ························ 7
6. WIRING DIAGRAM ············································ 8
7. REFRIGERANT SYSTEM DIAGRAM ············· 10
8. SERVICE FUNCTIONS ····································11
9. MICROPROCESSOR CONTROL ··················· 13
10. TROUBLESHOOTING ····································· 21
11. DISASSEMBLY INSTRUCTIONS ···················· 38
PARTS CATALOG (OBB623)
Revision D:
• MSZ-FH25VE2-
,
E1
FH35VE2-
,
and MSZ-
E1
ER1
FH50VE2-
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have been added.
E1
ER1
Please void OBH623 REVISED EDITION-C.
No. OBH623
REVISED EDITION-D
Outdoor unit service manual
Outdoor unit service manual
MUZ-FH·VEHZ Series (OBH625)
MUZ-FH·VE Series (OBH624)
MUZ-FH·VE Series
MUZ-FH·VEHZ Series (OBH625)
MXZ-D·VA Series
MXZ-D·VA Series (OBH626)
, MSZ-
ER1
Table of Contents
Related Manuals for Mitsubishi Electric MSZ-FH25VE - E1
Summary of Contents for Mitsubishi Electric MSZ-FH25VE - E1
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Page 1: Table Of Contents
Revision D: • MSZ-FH25VE2- , MSZ- FH35VE2- and MSZ- FH50VE2- have been added. Please void OBH623 REVISED EDITION-C. INDOOR UNIT No. OBH623 SERVICE MANUAL REVISED EDITION-D Models MSZ-FH25VE MSZ-FH35VE MSZ-FH50VE MSZ-FH25VE2 MSZ-FH35VE2 Outdoor unit service manual Outdoor unit service manual MUZ-FH·VEHZ Series (OBH625) MUZ-FH·VE Series (OBH624) MSZ-FH50VE2... - Page 2 Use the specifi ed 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 These models are compatible with the outdoor units with low standby power control. Connecting these models to the MUZ-FH·VE(HZ)-series outdoor units enables the low standby power control. Refer to the technical guide (OBT17) about the low standby power control. These models may be connected to the MUZ-FH·VE(HZ) series after once connected to the MXZ series and operated, for example because of relocation. -
Page 4: Part Names And Functions
PART NAMES AND FUNCTIONS MSZ-FH25VE MSZ-FH35VE MSZ-FH50VE MSZ-FH25VE2 MSZ-FH35VE2 MSZ-FH50VE2 Air inlet Emergency operation switch Air lter Horizontal vane Remote controller Remote control receiving section Operation indicator lamp ACCESSORIES MSZ-FH25VE MSZ-FH25VE2 Model MSZ-FH35VE Model MSZ-FH35VE2 MSZ-FH50VE MSZ-FH50VE2 Installation plate Installation plate Installation plate fi... -
Page 5: Specification
SPECIFICATION Indoor model MSZ-FH25VE MSZ-FH25VE2 MSZ-FH35VE MSZ-FH35VE2 MSZ-FH50VE MSZ-FH50VE2 Power supply Single phase 230 V, 50 Hz Cooling Power input Heating Cooling 0.28 0.29 Running current Heating 0.28 0.29 Model RC0J30-MD Cooling 0.28 0.29 Current Heating 0.28 0.29 Dimensions W × H × D 925 ×... -
Page 6: Noise Criteria Curve
NOISE CRITERIA CURVE MSZ-FH25VE MSZ-FH35VE MSZ-FH50VE MSZ-FH25VE2 MSZ-FH35VE2 MSZ-FH50VE2 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... -
Page 7: Outlines And Dimensions
OUTLINES AND DIMENSIONS MSZ-FH25VE MSZ-FH35VE MSZ-FH50VE MSZ-FH25VE2 MSZ-FH35VE2 MSZ-FH50VE2 Unit: mm MSZ-FH25VE MSZ-FH35VE MSZ-FH25VE2 MSZ-FH35VE2 Insulation ø37 O.D Liquid line ø6.35 - 0.50 m (Flared connection ø6.35) Gas line ø9.52 - 0.43 m (Flared connection ø9.52) Drain hose Insulation ø28 O.D Connected part ø16 O.D MSZ-FH50VE MSZ-FH50VE2 Insulation... -
Page 8: Wiring Diagram
WIRING DIAGRAM MSZ-FH25VE - MSZ-FH35VE - MSZ-FH50VE - MSZ-FH25VE - MSZ-FH35VE - MSZ-FH50VE - OBH623D... - Page 9 MSZ-FH25VE2 - MSZ-FH35VE2 - MSZ-FH50VE2 - MSZ-FH25VE2 - MSZ-FH35VE2 - MSZ-FH50VE2 - OBH623D...
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Page 10: Refrigerant System Diagram
REFRIGERANT SYSTEM DIAGRAM MSZ-FH25VE MSZ-FH35VE MSZ-FH25VE2 MSZ-FH35VE2 Unit: mm Refrigerant pipe ø9.52 (with heat insulator) Indoor coil Indoor thermistor heat RT12 (main) exchanger Flared connection Indoor coil thermistor RT13 (sub) Room temperature thermistor RT11 Flared connection Refrigerant pipe ø6.35 (with heat insulator) Refrigerant flow in cooling Refrigerant flow in heating MSZ-FH50VE... -
Page 11: Service Functions
SERVICE FUNCTIONS MSZ-FH25VE MSZ-FH35VE MSZ-FH50VE MSZ-FH25VE2 MSZ-FH35VE2 MSZ-FH50VE2 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. - Page 12 8-4. 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-FH25VE MSZ-FH35VE MSZ-FH50VE MSZ-FH25VE2 MSZ-FH35VE2 MSZ-FH50VE2 WIRELESS REMOTE CONTROLLER MSZ-FH25VE MSZ-FH35VE MSZ-FH50VE Signal transmitting section Distance of signal : About 6 m Beep(s) is (are) heard from the indoor unit when the signal is received. FAN SPEED CONTROL button OPERATION SELECT button ECONO COOL button WIDE VANE button... - Page 14 9-1. COOL ( ) OPERATION (1) Press OPERATE/STOP (ON/OFF) (MSZ-FH25/35/50VE)/STOP/OPERATE (OFF/ON) (MSZ-FH25/35/50VE2) 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 button to select the desired temperature. The setting range is 16 - 31°C. 1.
- Page 15 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 (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”.
- Page 16 (7) SWING ( ) 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 with multi outdoor unit, even if any indoor unit turns thermostat off, this control does not work in the indoor unit.
- Page 17 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 button. How to set the current time (a) Press the CLOCK button.
- Page 18 9-8. WEEKLY TIMER OPERATION • A 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. NOTE: 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 •...
- Page 19 (4) Press button to complete and transmit the weekly timer setting. which was blink- ing goes out, and the current time will be displayed. NOTE: • 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.
- Page 20 9-11. NATURAL FLOW ( ) OPERATION In NATURAL FLOW operation, air fl ow will become more like natural wind. An occupant will not be directly exposed to the air fl ow and feel more comfortable. (1) Press NATURAL FLOW button during COOL or FAN mode to start NATURAL FLOW operation. (2) Press NATURAL FLOW button again to cancel NATURAL FLOW operation.
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Page 21: Troubleshooting
TROUBLESHOOTING MSZ-FH25VE MSZ-FH35VE MSZ-FH50VE MSZ-FH25VE2 MSZ-FH35VE2 MSZ-FH50VE2 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 then after confirming the horizontal vane is closed, turn OFF the breaker and/or disconnect the power plug. - Page 22 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 23 2. Flow chart of AIR PURIFYING power failure mode recall function Operational procedure The air purifying device might be abnormal. Check if the air purifying device is abnormal according to the following procedures. Make sure that the remote controller is set to the failure mode recall function.
- Page 24 4. Indoor unit failure mode table Abnormal point POWER lamp Condition Remedy (Failure mode) Not lighted Normal — — The room temperature thermistor short or 1-time fl ash every Room temperature Refer to the characteristics of the room temperature open circuit is detected every 8 seconds dur- 0.5-second thermistor thermistor (10-7.).
- Page 25 10-3. INSTRUCTION OF TROUBLESHOOTING "Test Run operation" means the If blinking of OPERATION INDI- operation within 30 minutes af- CATOR lamp cannot be checked, Start ter EMERGENCY OPERATION it can be checked with failure switch is pressed. mode recall function. Indoor unit operates.
- Page 26 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. •...
- Page 27 OPERATION INDICATOR Lighted Blinking Not lighted (POWER) (AIR PURIFYING) Abnormal Operation indicator lamp Symptom Condition Remedy point • AIR PURIFYING lamp fl ash. The operation mode of the each indoor unit is MXZ type Outdoor unit differently set to COOL (includes DRY, FAN) •...
- Page 28 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.
- Page 29 B Check of remote controller and indoor electronic control P.C. board Check if the remote controller is exclusive for this air conditioner. Press OPERATE/STOP (ON/OFF) (MSZ-FH25/35/50VE)/STOP/ OPERATE (OFF/ON) (MSZ- FH25/35/50VE2) button on the 1 Look at the image of the signal transmitting section of remote controller.
- Page 30 C 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.
- Page 31 D How to check miswiring and serial signal error MUZ-25/35 Turn the power supply OFF. Is there rated voltage in the power supply? Check the power supply. Check for incorrect indoor-outdoor connecting wiring. Was the indoor unit ever connected to the Multi (MXZ) series and operated (turned on)? The connection information to the Multi series is stored...
- Page 32 MUZ-FH50 Turn the power supply OFF. NOTE: Refer to the outdoor unit service manual. Is there rated voltage in the power supply? Check the power supply. Check for incorrect indoor-outdoor connecting wiring. Was the indoor unit ever connected to the Multi •...
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MXZ Type 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. Press EMERGENCY OPERATION switch once. Does the indoor POWER lamp light up?
- Page 34 Turn ON the power supply. LED indication for communication status Communication status is indicated by the LED. Is there rated voltage Check the power supply Unit status between outdoor Blinking: Normal communication and correct the problem. terminal block S1 and S2 ? Lighted: Abnormal communication or not connected Not lighted: The outdoor P.C.
- Page 35 When AIR PURIFYING lamp flashes 2-time. When POWER lamp flashes 1 to 5 times while AIR PURIFYING power failure mode is recalled. E Check of AIR PURIFYING power After performing the check, make sure to release the failure mode recall function. High voltage (approximately 5.8kV) is generated during AIR PURIFYING power operation.
- Page 36 F 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 37 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-FH25VE MSZ-FH35VE MSZ-FH50VE MSZ-FH25VE2 MSZ-FH35VE2 MSZ-FH50VE2 Connector Terminal Varistor (NR11) Fuse (F11) Indoor fan motor Indoor power P.C. board Block (CN201) (CN211) (+)0 or 15 VDC...
Page 38: Disassembly Instructions
DISASSEMBLY INSTRUCTIONS DISASSEMBLY INSTRUCTIONS <"Terminal with locking mechanism" Detaching points> The terminal which has the locking mechanism can be detached as shown below. There are 2 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.- Page 39 OPERATING PROCEDURE PHOTOS 2. Removing the indoor electrical box Photo 3 Earth wire (1) Remove the panels (Refer to 1.) and the right corner Electrical box box. (2) Remove the screw of the V.A. clamp. Remove the V.A. clamp and the indoor/outdoor connecting wire.
- Page 40 OPERATING PROCEDURE PHOTOS 4. Removing the nozzle assembly Photo 7 (1) Remove the panels (Refer to 1.) and the right corner Screw of the vertical box. vane motor unit (2) Remove the indoor/outdoor connecting wire (Refer to 2.). (3) Remove the electrical cover (Refer to 2.). (4) Disconnect the following connector:
- Page 41 OPERATING PROCEDURE PHOTOS 7. Removing the air purifying device Photo 9 Lead wire of the indoor (1) Remove the panels (Refer to 1.) and the right corner coil thermistor box. Water cut (2) Remove the air purifying device. (3) Remove the electrical box (Refer to 2.). (4) Remove the lead wire from the water cut.
- Page 42 Do not pull the lead wire when removing the indoor coil thermistor. HEAD OFFICE: TOKYO BLDG., 2-7-3, MARUNOUCHI, CHIYODA-KU, TOKYO 100-8310, JAPAN © Copyright 2012 MITSUBISHI ELECTRIC CORPORATION Distributed in Nov. 2015. No. OBH623 REVISED EDITION-D Distributed in Jul. 2014. No. OBH623 REVISED EDITION-C Distributed in Dec.