Mitsubishi Electric MUZ-DM25VA User Manual

Models
MUZ-DM25VA
-
E1
,
ER1
,
ET1
MUZ-DM35VA
-
E1
,
ER1
,
ET1
OUTDOOR UNIT
SERVICE MANUAL
No. OBH751
CONTENTS
1. TECHNICAL CHANGES ······························2
2. PART NAMES AND FUNCTIONS ··················3
3. SPECIFICATION ········································4
4. NOISE CRITERIA CURVES ··························6
5. OUTLINES AND DIMENSIONS ·····················7
6. WIRING DIAGRAM ·····································8
7. REFRIGERANT SYSTEM DIAGRAM ·············9
8. PERFORMANCE CURVES ························ 10
9. ACTUATOR CONTROL ····························· 20
10. SERVICE FUNCTIONS ······························ 21
11. TROUBLESHOOTING ······························· 22
12. DISASSEMBLY INSTRUCTIONS ················· 40
HFC
utilized
R410A
Indoor unit service manual
MSZ-DM•VA Series (OBH750)
NOTE:
RoHS compliant products have <G> mark on the spec name plate.
PARTS CATALOG (OBB751)

Mitsubishi Electric MUZ-DM25VA Specifications

General

Type	Split System
Cooling Capacity	2.5 kW
Heating Capacity	3.2 kW
Refrigerant	R32
Power Supply	220-240 V, 50 Hz
Indoor Unit Weight	9 kg
Operating Temperature Range (Cooling)	-10°C to 46°C
Operating Temperature Range (Heating)	-15°C to 24°C

Summary

Specifications

Wiring Diagram

Refrigerant System Diagram

Performance Curves

Actuator Control

Relation Between Main Sensor and Actuator

Service Functions

Change in Defrost Setting

Pre-Heat Control Setting

Troubleshooting

Cautions on Troubleshooting

Important precautions and safety measures before and during troubleshooting.

Failure Mode Recall Function

Procedure to recall and analyze memorized abnormal conditions.

Troubleshooting Check Table

Table listing symptoms, LED indications, conditions, and remedies for faults.

Trouble Criterion of Main Parts

Methods and criteria for checking the condition of key components.

Troubleshooting Flow

Step-by-step flowcharts for diagnosing inverter and compressor issues.

Test Point Diagram and Voltage

Diagrams of the inverter P.C. board with test points and voltage measurements.

Disassembly Instructions

Removing the Cabinet and the Panels

Removing the Inverter Assembly, Inverter P.C. Board

Removing the R.V. Coil

Removing Thermistors and Outdoor Heat Exchanger Temperature Thermistor

Removing the Outdoor Fan Motor

Removing the Compressor and the 4-way Valve