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Mitsubishi Electric MUZ-EF VG Series User Manual

Mitsubishi Electric MUZ-EF VG Series
52 pages
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1
INDOOR UNIT
No. OBH831
REVISED EDITION-A
Models
MSZ-EF18VGW/B/S
-
E1
,
E2
MSZ-EF18VGKW/B/S
-
E1
MSZ-EF22VGW/B/S
-
E1
,
ET1
,
E2
,
ET2
MSZ-EF22VGKW/B/S
-
E1
,
ET1
MSZ-EF25VGW/B/S
-
E1
,
ET1
,
E2
,
ET2
MSZ-EF25VGKW/B/S
-
E1
,
ET1
MSZ-EF35VGW/B/S
-
E1
,
ET1
,
E2
,
ET2
MSZ-EF35VGKW/B/S
-
E1
,
ET1
MSZ-EF42VGW/B/S
-
E1
,
ET1
,
E2
,
ET2
MSZ-EF42VGKW/B/S
-
E1
,
ET1
MSZ-EF50VGW/B/S
-
E1
,
ET1
,
E2
,
ET2
MSZ-EF50VGKW/B/S
-
E1
,
ET1
MSZ-EF∙VGW/VGKW
MSZ-EF∙VGB/VGKB
MSZ-EF∙VGS/VGKS
PARTS CATALOG (OBB831)
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 ∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙ 27
11. DISASSEMBLY INSTRUCTIONS ∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙ 44
SERVICE MANUAL
Outdoor unit service manual
MUZ-EF∙VG/H Series (OBH832)
MXZ-F∙VF Series(OBH790)
OBH831 is void.
Revision A:
MSZ-EF18/22/25/35/42/50VGW/B/S -
E2
,
MSZ-EF22/25/35/42/50VGW/B/S -
ET2
,
MSZ-EF18/22/25/35/42/50VGKW/B/S -
E1
and
MSZ-EF22/25/35/42/50VGKW/B/S -
ET1
have been added.
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Mitsubishi Electric MUZ-EF VG Series Specifications

General IconGeneral
RefrigerantR32
Power Supply220-240 V, 50 Hz
Wi-Fi ControlOptional (with additional adapter)
TypeAir Conditioner
SeriesMUZ-EF VG Series
Energy Efficiency Ratio (EER)Varies by model
FeaturesInverter Technology, Quiet Operation
ColorWhite
Energy Efficiency Class (Cooling)A+++
Airflow Direction4-way adjustable louvers

Summary

TECHNICAL CHANGES

New Model Addition

Details new model additions for compatibility.

Indoor Electronic Control PC Board Change

Notes a change in the indoor electronic control P.C. board.

PART NAMES AND FUNCTIONS

Indoor Unit Components

Identifies and describes main parts of the indoor unit.

Accessories

Lists and describes optional accessories for the unit.

SPECIFICATION

Indoor Model Specifications

Details electrical and performance specs for indoor units.

Remote Controller Model

Specifies the model of the remote controller.

Main Electric Parts Specifications

Lists specifications for key electric components.

NOISE CRITERIA CURVES

OUTLINES AND DIMENSIONS

WIRING DIAGRAM

REFRIGERANT SYSTEM DIAGRAM

SERVICE FUNCTIONS

Timer Short Mode

Allows shortening of timer set times for service.

Remote Controller Exclusive Setting

Assigns remote controllers to specific indoor units.

Auto Restart Function

Enables automatic operation restart after power interruption.

Wi-Fi Interface Setting Up

Guides on connecting the Wi-Fi interface to MELCloud.

MICROPROCESSOR CONTROL

Wireless Remote Controller Operation

Details the functions and buttons of the wireless remote controller.

Indoor Unit Display and Indicators

Explains the operation indicator lamps and their meanings.

Cool Operation Modes

Describes the procedures and features of Cool mode.

Dry Operation Modes

Describes the procedures and features of Dry mode.

Fan Operation Modes

Describes the procedures and features of Fan mode.

Heat Operation Modes

Describes the procedures and features of Heat mode.

Auto Changeover and Auto Mode Operation

Explains automatic switching between Cool and Heat modes.

Auto Vane Operation

Details automatic horizontal vane angle control and modes.

Timer Operation

Instructions for setting ON/OFF timers.

Weekly Timer Operation

Instructions for setting up weekly timer schedules.

i-save Operation

Describes how to set and cancel the i-save function.

Emergency and Test Operation

Guides on using emergency and test run modes.

3-Minute Time Delay Operation

Explains the compressor restart delay function.

TROUBLESHOOTING

Troubleshooting Cautions

Important safety warnings before performing troubleshooting.

Failure Mode Recall Function

Procedure to recall and diagnose past failure modes.

Troubleshooting Instruction Flow

Step-by-step guide for diagnosing unit issues.

Troubleshooting Check Table

Table correlating indicator patterns to faults and remedies.

Trouble Criterion of Main Parts

Specific checks and criteria for key components.

Indoor Fan Motor Troubleshooting Flow

Diagnostic flow for indoor fan motor issues.

Remote Controller and PC Board Check

Procedure to check remote controller and indoor electronic board.

Indoor PC Board and Fan Motor Check

Detailed checks for the indoor PC board and fan motor.

Troubleshooting Flow for Specific Models

Diagnostic flow tailored for specific VG/VGK models.

Troubleshooting Flow for 50VG Models

Diagnostic flow for 50VG/VGK models.

Miswiring and Serial Signal Error Check

Procedure to diagnose miswiring and serial signal issues.

MXZ Type Miswiring and Signal Check

Troubleshooting serial signal and wiring for MXZ type.

Electromagnetic Noise Troubleshooting

Steps to address electromagnetic noise interference.

TEST POINT DIAGRAM AND VOLTAGE

DISASSEMBLY INSTRUCTIONS

Removing the Panel

Step-by-step guide to remove the front panel.

Removing the Indoor Electrical Box

Procedure to detach the indoor electrical box.

Removing Wi-Fi Interface (General)

Instructions for removing the Wi-Fi interface unit.

Removing PC Boards and Components

Guide to removing various boards and components.

Removing the Nozzle Assembly

Instructions for removing the nozzle assembly.

Removing the Horizontal Vane Motor

Procedure to remove the horizontal vane motor.

Removing Fan Motor, Coil Thermistor, and Line Flow Fan

Guide to removing the fan motor, thermistor, and fan.

Removing Wi-Fi Interface (VGKW Models)

Instructions for removing the Wi-Fi interface unit for VGKW models.

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