hit counter script
Mitsubishi Electric MUZ-EF25VE Service Manual
  1. Manuals
  2. Brands
  3. Mitsubishi Electric Manuals
  4. Air Conditioner
  5. MUZ-EF25VE
  6. Service manual

Mitsubishi Electric MUZ-EF25VE Service Manual

Outdoor unit
Hide thumbs Also See for MUZ-EF25VE:
Table of Contents

Advertisement

Quick Links

INDOOR UNIT
OUTDOOR UNIT
SERVICE MANUAL
Models
MUZ-EF42VE
NOTE:
RoHS compliant products have <G> mark on the spec name plate.
Revision F:
• The descriptions of the expansion valve coil have
been corrected. (11-4.)
Please void OBH590 REVISED EDITION-E.
,
,
,
,
-
E1
E2
E3
E4
-
,
,
,
E1
E2
E3
ER2
-
,
,
,
,
E1
E2
E3
E4
-
,
,
,
E1
E2
E3
ER2
,
,
,
,
-
E1
E2
E3
E4
-
,
,
,
E1
E2
ER2
ET2
CONTENTS
1. TECHNICAL CHANGES ··································· 2
2. PART NAMES AND FUNCTIONS ····················· 4
3. SPECIFICATION ················································ 5
4. NOISE CRITERIA CURVES ······························ 7
5. OUTLINES AND DIMENSIONS ························ 8
6. WIRING DIAGRAM ············································ 9
7. REFRIGERANT SYSTEM DIAGRAM ············· 12
8. PERFORMANCE CURVES ····························· 14
9. ACTUATOR CONTROL ··································· 28
10. SERVICE FUNCTIONS ···································· 29
11. TROUBLESHOOTING ····································· 29
12. DISASSEMBLY INSTRUCTIONS ···················· 48
PARTS CATALOG (OBB590)
No. OBH590
HFC
utilized
REVISED EDITION-F
R410A
,
,
,
ER3
ER4
ET3
ET4
,
,
,
ER3
ET2
ET3
,
,
,
ER3
ER4
ET3
ET4
,
,
,
ER3
ET2
ET3
,
,
,
ER3
ER4
ET3
ET4
Indoor unit service manual
MSZ-EF•VE Series (OBH589)

Advertisement

Table of Contents
loading

Related Manuals for Mitsubishi Electric MUZ-EF25VE

Summary of Contents for Mitsubishi Electric MUZ-EF25VE

  • Page 1: Table Of Contents

    MUZ-EF35VE MUZ-EF35VEH MUZ-EF42VE MUZ-EF50VE Indoor unit service manual MSZ-EF•VE Series (OBH589) CONTENTS MUZ-EF25VE MUZ-EF25VEH MUZ-EF35VE MUZ-EF35VEH 1. TECHNICAL CHANGES ··································· 2 MUZ-EF42VE 2. PART NAMES AND FUNCTIONS ····················· 4 3. SPECIFICATION ················································ 5 4. NOISE CRITERIA CURVES ······························ 7 5. OUTLINES AND DIMENSIONS ························ 8 6.

  • Page 2: Muz-Ef25Ve

    • MUZ-EF25/35/42VE - and MUZ-EF25/35VEH - have been added. Revision F: • The descriptions of the expansion valve coil have been corrected. (11-4.) TECHNICAL CHANGES MUZ-EF25VE - MUZ-EF25VEH - MUZ-EF35VE - MUZ-EF35VEH - MUZ-EF42VE - MUZ-EF50VE - 1. New model...
  • Page 3 MUZ-EF25VE - MUZ-EF25VE - MUZ-EF35VE - MUZ-EF35VE - MUZ-EF42VE - MUZ-EF42VE - 1. Condenser net has been changed. MUZ-EF25VE - MUZ-EF25VEH - MUZ-EF35VE - MUZ-EF35VEH - MUZ-EF42VE - MUZ-EF50VE - 1. New model MUZ-EF25VE - MUZ-EF25VEH - MUZ-EF35VE - MUZ-EF35VEH -...

  • Page 4: Part Names And Functions

    PART NAMES AND FUNCTIONS MUZ-EF25VE MUZ-EF25VEH MUZ-EF35VE MUZ-EF35VEH MUZ-EF42VE Air inlet (back and side) Piping Drain hose Air outlet Drain outlet MUZ-EF50VE Air inlet (back and side) Piping Drain hose Air outlet Drain outlet ACCESSORIES MUZ-EF25VE MUZ-EF35VE MODELS MUZ-EF42VE MUZ-EF50VE...

  • Page 5: Specification

    SPECIFICATION 1 Measured under rated operating frequency. 2 MUZ-EF25/35/42VE- MUZ-EF25/35VEH- 3 MUZ-EF25/35/42VE- /MUZ-EF25/35VEH- MUZ-EF25VE MUZ-EF35VE Outdoor model MUZ-EF42VE MUZ-EF50VE MUZ-EF25VEH MUZ-EF35VEH Power supply Single phase, 230 V, 50 Hz Cooling 2.5 (1.2 - 3.4) 3.5 (1.4 - 4.0) 4.2 (0.9 - 4.6) 5.0 (1.4 - 5.4)
  • Page 6 Specifi cations and rated conditions of main electric parts Model MUZ-EF25VE MUZ-EF25VEH MUZ-EF35VE MUZ-EF35VEH MUZ-EF42VE MUZ-EF50VE Item (C61, C62) 600 μF/620 μF 420 V Smoothing capacitor (C63) — 600 μF/620 μF 420 V Diode module (DB61) 15 A 600 V...

  • Page 7: Noise Criteria Curves

    NOISE CRITERIA CURVES MUZ-EF25VE MUZ-EF25VEH MUZ-EF35VE MUZ-EF35VEH 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 NC-10 NC-10 1000 2000 4000 8000 1000 2000 4000 8000 BAND CENTER FREQUENCIES, Hz...

  • Page 8: Outlines And Dimensions

    OUTLINES AND DIMENSIONS MUZ-EF25VE MUZ-EF25VEH MUZ-EF35VE MUZ-EF35VEH MUZ-EF42VE Unit: mm REQUIRED SPACE *1 100 mm or more when front and sides of the unit are clear Drain hole ø42 (MUZ-EF25/35/42VE) Drain hole ø33 (MUZ-EF25/35VEH) Air in Air in *2 When any 2 sides of left, right...

  • Page 9: Wiring Diagram

    WIRING DIAGRAM MUZ-EF25VE - MUZ-EF35VE - MUZ-EF25VE - MUZ-EF35VE - OBH590F...
  • Page 10 MUZ-EF25VEH - , MUZ-EF35VEH - MUZ-EF25VEH - MUZ-EF35VEH - OBH590F...
  • Page 11 MUZ-EF42VE - MUZ-EF50VE - MUZ-EF42VE - MUZ-EF50VE - OBH590F...

  • Page 12: Refrigerant System Diagram

    REFRIGERANT SYSTEM DIAGRAM MUZ-EF25VE MUZ-EF25VEH Unit: mm Refrigerant pipe ø9.52 4-way valve (with heat insulator) Muffler Outdoor heat exchanger Stop valve temperature thermistor Outdoor Muffler RT68 Discharge Flared connection heat temperature exchanger thermistor RT62 Ambient Compressor temperature thermistor RT65 Defrost...
  • Page 13 MUZ-EF50VE Unit: mm Muffler Refrigerant pipe ø 12.7 #100 4-way valve (with heat insulator) Stop valve (with service port) Outdoor Flared connection Discharge heat Ambient temperature exchanger temperature thermistor Defrost thermistor RT62 thermistor RT65 RT61 Compressor Outdoor heat exchanger temperature thermistor RT68 Flared connection...

  • Page 14: Performance Curves

    PERFORMANCE CURVES MUZ-EF25VE MUZ-EF25VEH MUZ-EF35VE MUZ-EF35VEH MUZ-EF42VE MUZ-EF50VE The standard specifications apply only to the operation of the air conditioner under normal conditions. Since operating condi- tions vary according to the areas where these units are installed, the following information has been provided to clarify the operating characteristics of the air conditioner under the conditions indicated by the performance curve.
  • Page 15 Total input (Cooling : at Rated frequency 11.5 13.1 10.5 11.8 10.6 Indoor intake air Wet-bulb temperature( ) Outdoor intake air Dry-bulb temperature (°C) Heating capacity (at Rated frequency) 17.6 20.6 27.8 28.7 16.2 19.0 25.7 26.5 14.9 17.4 23.5 24.3 13.5 15.8...
  • Page 16 8-2. CAPACITY AND INPUT CORRECTION BY OPERATIONAL FREQUENCY OF COMPRESSOR MUZ-EF25VE MUZ-EF25VEH Correction of Cooling capacity Correction of Cooling input Correction of Heating capacity Correction of Heating input The operational frequency The operational frequency The operational frequency The operational frequency...
  • Page 17 8-4. OUTDOOR LOW PRESSURE AND OUTDOOR UNIT CURRENT COOL operation Dry-bulb temperature (°C) Relative humidity (%) Both indoor and outdoor unit are under the same temperature/ humidity condition. Operation: TEST RUN OPERATION (Refer to 8-3.) Outdoor low pressure MUZ-EF25VE MUZ-EF35VE MUZ-EF42VE MUZ-EF25VEH MUZ-EF35VEH (kgf/cm [Gauge])(MPa [Gauge]) (kgf/cm...
  • Page 18 Outdoor unit current MUZ-EF25VE MUZ-EF25VEH MUZ-EF35VE MUZ-EF35VEH MUZ-EF42VE Ambient temperature(°C) Ambient temperature (°C) Ambient temperature (°C) Ambient humidity(%) Ambient humidity(%) Ambient humidity(%) MUZ-EF50VE Ambient temperature (°C) Ambient humidity(%) HEAT operation Condition: Indoor Outdoor Dry bulb temperature (°C) 20.0 20.0 Wet bulb temperature (°C) 14.5 14.5...
  • Page 19 PERFORMANCE DATA COOL operation a t Rated frequency MUZ-EF25VE MUZ-EF25VEH CAPACITY: 2.5 kW SHF: 0.92 INPUT: 545 W OUTDOOR DB (°C) INDOOR INDOOR DB (°C) WB (°C) INPUT INPUT INPUT INPUT 2.94 2.17 0.74 2.81 2.08 0.74 2.70 2.00 0.74 2.60...
  • Page 20 PERFORMANCE DATA COOL operation a t Rated frequency MUZ-EF25VE MUZ-EF25VEH CAPACITY: 2.5 kW SHF: 0.92 INPUT: 545 W OUTDOOR DB (°C) INDOOR INDOOR DB (°C) WB (°C) INPUT INPUT INPUT 2.45 1.81 0.74 2.25 1.67 0.74 2.08 1.54 0.74 2.58 1.60...
  • Page 21 PERFORMANCE DATA COOL operation a t Rated frequency MUZ-EF35VE MUZ-EF35VEH CAPACITY: 3.5 kW SHF: 0.80 INPUT: 910 W OUTDOOR DB (°C) INDOOR INDOOR DB (°C) WB (°C) INPUT INPUT INPUT INPUT 4.11 2.55 0.62 3.94 2.44 0.62 3.78 2.34 0.62 3.64 2.26 0.62...
  • Page 22 PERFORMANCE DATA COOL operation a t Rated frequency MUZ-EF35VE MUZ-EF35VEH CAPACITY: 3.5 kW SHF: 0.80 INPUT: 910 W OUTDOOR DB (°C) INDOOR INDOOR DB (°C) WB (°C) INPUT INPUT INPUT 3.43 2.13 0.62 3.15 1.95 0.62 2.91 1.80 0.62 3.61 1.80 0.50 3.36...
  • Page 23 PERFORMANCE DATA COOL operation a t Rated frequency MUZ-EF42VE CAPACITY: 4.2 kW SHF: 0.72 INPUT: 1280 W OUTDOOR DB (°C) INDOOR INDOOR DB (°C) WB (°C) INPUT INPUT INPUT INPUT 4.94 2.66 0.54 1024 4.73 2.55 0.54 1075 4.54 2.45 0.54 1126 4.37...
  • Page 24 PERFORMANCE DATA COOL operation a t Rated frequency MUZ-EF42VE CAPACITY: 4.2 kW SHF: 0.72 INPUT: 1280 W OUTDOOR DB (°C) INDOOR INDOOR DB (°C) WB (°C) INPUT INPUT INPUT 4.12 2.22 0.54 1254 3.78 2.04 0.54 1331 3.49 1.88 0.54 1382 4.33 1.82...
  • Page 25 PERFORMANCE DATA COOL operation a t Rated frequency MUZ-EF50VE CAPACITY: 5.0 kW SHF: 0.71 INPUT: 1560 W OUTDOOR DB (°C) INDOOR INDOOR DB (°C) WB (°C) INPUT INPUT INPUT INPUT 5.88 3.11 0.53 1248 5.63 2.98 0.53 1310 5.40 2.86 0.53 1373 5.20...
  • Page 26 PERFORMANCE DATA COOL operation a t Rated frequency MUZ-EF50VE CAPACITY: 5.0 kW SHF: 0.71 INPUT: 1560 W OUTDOOR DB (°C) INDOOR INDOOR DB (°C) WB (°C) INPUT INPUT INPUT 4.90 2.60 0.53 1529 4.50 2.39 0.53 1622 4.15 2.20 0.53 1685 5.15 2.11...
  • Page 27 PERFORMANCE DATA HEAT operation at Rated frequency MUZ-EF25VE MUZ-EF25VEH CAPACITY: 3.2 kW INPUT: 700 W OUTDOOR WB (°C) INDOOR DB (°C) INPUT INPUT INPUT INPUT INPUT INPUT INPUT 2.02 2.43 2.85 3.26 3.68 4.06 4.48 1.92 2.30 2.72 3.10 3.52 3.90...

  • Page 28: Actuator Control

    ACTUATOR CONTROL MUZ-EF25VE MUZ-EF25VEH MUZ-EF35VE MUZ-EF35VEH MUZ-EF42VE MUZ-EF50VE 9-1. OUTDOOR FAN MOTOR CONTROL The fan motor turns ON/OFF, interlocking with the compressor. [ON] The fan motor turns ON 5 seconds before the compressor starts up. [OFF] The fan motor turns OFF 15 seconds after the compressor has stopped running.

  • Page 29: Service Functions

    SERVICE FUNCTIONS MUZ-EF25VE MUZ-EF25VEH MUZ-EF35VE MUZ-EF35VEH MUZ-EF42VE MUZ-EF50VE 10-1. CHANGE IN DEFROST SETTING Changing defrost finish temperature <JS> To change the defrost finish temperature, cut/solder the JS wire of the outdoor inverter P.C. board. (Refer to 11-6-1.) Defrost fi nish temperature (°C)
  • Page 30 11-2. 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 (11-3.) disappears, the memorized failure details can be recalled. 1.
  • Page 31 2. Flow chart of the detailed outdoor unit failure mode recall function Operational procedure The outdoor unit might be abnormal. Check if outdoor unit is abnormal according to the following procedures. Make sure that the remote controller is set to the failure mode recall function. 1.
  • Page 32 3. Outdoor unit failure mode table The left lamp of Indoor/outdoor Outdoor unit OPERATION Abnormal point LED indication unit failure Condition Remedy failure mode INDICATOR (Failure mode/protection) (Outdoor P.C. board) mode recall recall function lamp function (Indoor unit) None (Normal) —...
  • Page 33 The left lamp of Indoor/outdoor Outdoor unit OPERATION Abnormal point LED indication unit failure Condition Remedy failure mode INDICATOR (Failure mode/protection) (Outdoor P.C. board) mode recall recall function lamp function (Indoor unit) 10-time fl ash Discharge temperature Temperature of discharge temperature •...
  • Page 34 11-3. TROUBLESHOOTING CHECK TABLE Abnormal point/ Symptom LED indication Condition Remedy Condition Outdoor unit 1-time fl ash every Outdoor power sys- Overcurrent protection cut-out operates 3 consecutive times • Reconnect connector of compres- does not op- 2.5 seconds within 1 minute after the compressor gets started. sor.
  • Page 35 11-3. TROUBLESHOOTING CHECK TABLE Abnormal point/ Symptom LED indication Condition Remedy Condition Outdoor unit 7-time fl ash Low discharge tem- Temperature of discharge temperature thermistor has been • Refer to 11-5. "Check of LEV". operates. 2.5 seconds OFF perature protection 50°C or less for 20 minutes.
  • Page 36 11-4. TROUBLE CRITERION OF MAIN PARTS MUZ-EF25VE MUZ-EF25VEH MUZ-EF35VE MUZ-EF35VEH MUZ-EF42VE MUZ-EF50VE Part name Check method and criterion Figure Defrost thermistor (RT61) Fin temperature thermistor (RT64) Measure the resistance with a tester. Ambient temperature Refer to 11-6. “Test point diagram and voltage”, 1. “Inverter P.C.
  • Page 37 11-5. TROUBLESHOOTING FLOW A How to check inverter/compressor Disconnect the connector between compressor and the intelligent power module (IC700). Check the voltage between terminals. See 11-5. “Check of open phase”. Replace the inverter P.C. board. Are the voltages balanced? Check the compressor. See 11-5.
  • Page 38 D Check of compressor winding ●Disconnect the connector between the compressor and intelligent power module, and measure the resistance between the compressor terminals. <<Measurement point>> At 3 points BLK-WHT BLK-RED Measure the resistance between the lead wires at 3 points. WHT-RED <<Judgement>>...
  • Page 39 G Check of outdoor thermistors Disconnect the connector of thermistor in the inverter P.C. board (see below table), and measure the resistance of thermistor. Replace the thermistor except RT64. Is the resistance of thermistor normal? When RT64 is abnormal, replace the inverter P.C. (Refer to 11-6.1.) board.
  • Page 40 I Check of outdoor fan motor Disconnect the connectors CN931 and CN932 from the inverter P.C. board. Check the connection between the connector CN931 and CN932. Is the resistance between each ter- minal of outdoor fan motor normal? (Refer to 11-4.) Disconnect CN932 from the inverter P.C.
  • Page 41 J Check of power supply Disconnect the connector between compressor and inverter module. Rectify indoor/outdoor Turn ON power supply and press connecting wire. EMERGENCY OPERATION switch. Does the left lamp of OPERATION Is there voltage 230 VAC Replace the indoor INDICATOR lamp on the indoor unit between the indoor terminal electronic control P.C.
  • Page 42 K Check of LEV (Expansion valve) MSZ-EF•VEW/B/S MSZ-EF•VE2W/B/S Turn ON the power supply. <Preparation of the remote controller> While pressing both OPERATION SELECT button and TEMP button on the remote controller at the same time, press RESET button. First, release RESET button. Hold down the other two buttons for another 3 seconds.
  • Page 43 L Check of inverter P.C. board Check the outdoor fan motor. (Refer to 11-5. .) Is the fuse (F901) blown on the in- verter P.C. board? Check the connection of the connectors (CN931, CN932) of the outdoor fan motor. If the connection is poor, make it correct. Operate the outdoor unit by starting EMERGENCY OPERATION.
  • Page 44 M How to check miswiring and serial signal error Turn the main 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 45 N Check of defrost heater MUZ-EF•VEH Check the following points before checking electric continuity. 1. Does the resistance of ambient temperature thermistor have the characteristics? Refer to 11-6.1. 2. Is the resistance of defrost heater normal? Refer to 11-4. 3. Does the heater protector remain conducted (not open)? 4.
  • Page 46 P 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 47 11-6. TEST POINT DIAGRAM AND VOLTAGE 1. Inverter P.C. board MUZ-EF25VE MUZ-EF25VEH MUZ-EF35VE MUZ-EF35VEH MUZ-EF42VE MUZ-EF50VE Heater connector (CN722) Smoothing Smoothing Smoothing R.V.coil MUZ-EF25/35VEH capacitor (C63) capacitor capacitor (CN721) DB61 MUZ-EF42/50VE Back side of unit (C62) (C61) 230 VAC MUZ-EF42/50VE...

  • Page 48: Disassembly Instructions

    Locking lever lever. Connector 12-1. MUZ-EF25VE MUZ-EF25VEH MUZ-EF35VE MUZ-EF35VEH MUZ-EF42VE NOTE: Turn OFF the power supply before disassembly. OPERATING PROCEDURE PHOTOS 1. Removing the cabinet Photo 1 (1) Remove the screw fixing the service panel.
  • Page 49 OPERATING PROCEDURE PHOTOS 2. Removing the inverter assembly, inverter P.C. board Photo 3 (1) Remove the cabinet and panels. (Refer to 1.) Screws of the heat sink Screws of the terminal block (2) Disconnect the lead wire to the reactor and the following con- support and the separator support and the back panel nectors:...
  • Page 50 OPERATING PROCEDURE PHOTOS 5. Removing outdoor fan motor Photo 6 Ambient temperature (1) Remove the cabinet and panels. (Refer to 1.) thermistor (2) Disconnect the following connectors: <Inverter P.C. board> CN931, CN932 (Fan motor) (3) Remove the propeller fan nut. Outdoor heat (4) Remove the propeller fan.
  • Page 51 12-2. MUZ-EF50VE NOTE: Turn OFF the power supply before disassembly. OPERATING PROCEDURE PHOTOS 1. Removing the cabinet Photo 1 (1) Remove the screws of the service panel. Screws of the top panel (2) Remove the screws of the top panel. (3) Remove the screw of the valve cover.
  • Page 52 OPERATING PROCEDURE PHOTOS 2. Removing the inverter assembly, inverter P.C. board Photo 3 Screws of the terminal (1) Remove the cabinet and panels. (Refer to 1.) Screw of the heat sink block support and the (2) Disconnect the lead wire to the reactor and the following con- support and the separator back panel nectors:...
  • Page 53 OPERATING PROCEDURE PHOTOS 4. Removing the discharge temperature thermistor, Photo 6 defrost thermistor, outdoor heat exchanger tempera- Outdoor heat Ambient tem- exchanger tempera- perature ture thermistor and ambient temperature thermistor ture thermistor thermistor (1) Remove the cabinet and panels. (Refer to 1.) (2) Disconnect the lead wire to the reactor and the following connectors: <Inverter P.C.
  • Page 54 HEAD OFFICE: TOKYO BLDG., 2-7-3, MARUNOUCHI, CHIYODA-KU, TOKYO 100-8310, JAPAN © Copyright 2010 MITSUBISHI ELECTRIC CORPORATION Distributed in Jan. 2015. No. OBH590 REVISED EDITION-F Distributed in Oct. 2014. No. OBH590 REVISED EDITION-E Distributed in Aug. 2014. No. OBH590 REVISED EDITION-D Distributed in Jan.
  • Page 55 Related Links Model Number: MUZ-EF25VE MSZ-EF25-50 and MUZ-EF25-50 Declaration of Conformity (JG79R589H01) MUZ-EF25-50VE Parts Catalogue (OBB590C) MUZ-EF25-50VE Service Manual (OBH590F) MSZ-EF25-50VE3 MUZ-EF25-50VE Declaration of Conformity CE2015B14...

This manual is also suitable for:

Muz-ef25ve-e1Muz-ef25ve-e2Muz-ef25ve-e3Muz-ef25ve-e4Muz-ef25ve-er3Muz-ef25ve-er4 ... Show all

Table of Contents