Mitsubishi Electric MSZ-DW50VF-E1 User Manual

CONTENTS
1. TECHNICAL CHANGES ······························2
2. PART NAMES AND FUNCTIONS ··················3
3. SPECIFICATION ········································4
4. NOISE CRITERIA CURVES ··························5
5. OUTLINES AND DIMENSIONS ·····················6
6. WIRING DIAGRAM ·····································7
7. REFRIGERANT SYSTEM DIAGRAM ·············8
8. SERVICE FUNCTIONS ································ 9
9. MICROPROCESSOR CONTROL ················ 11
10. TROUBLESHOOTING ······························· 15
11. DISASSEMBLY INSTRUCTIONS ·················27
INDOOR UNIT
SERVICE MANUAL
No. OBH905
PARTS CATALOG (OBB905)
Models
MSZ-DW25VF
-
E1
,
ER1
,
ET1
MSZ-DW35VF
-
E1
,
ER1
,
ET1
MSZ-DW50VF
-
E1
,
ER1
,
ET1
Outdoor unit service manual
MUZ-DW·VF Series (OBH906)
MXZ-HA∙VF Series (OBH828)

Mitsubishi Electric MSZ-DW50VF-E1 Specifications

General

Model	MSZ-DW50VF-E1
Category	Air Conditioner
Manufacturer	Mitsubishi Electric
Type	Split System
Cooling Capacity	5.0 kW
Heating Capacity	5.4 kW
Power Supply	220-240V, 50Hz
Energy Efficiency Ratio (Cooling)	3.21
Coefficient of Performance (Heating)	3.61
Refrigerant	R32
Outdoor Unit Dimensions (W x H x D)	800 x 550 x 285 mm

Summary

Part Names and Functions

Specifications

Outlines and Dimensions

Wiring Diagram

Refrigerant System Diagram

Microprocessor Control

Cooling Operation

Heating Operation

Troubleshooting

Cautions on Troubleshooting

Outlines essential safety precautions and general checks before performing troubleshooting.

Failure Mode Recall Function

Explains how to recall and interpret stored error codes from the unit's memory.

Table of Indoor Unit Failure Mode Recall Function

Lists specific blinking patterns for indoor unit faults and their corresponding remedies.

Instruction of Troubleshooting

Provides step-by-step guidance and flowcharts for diagnosing unit malfunctions.

Troubleshooting Check Table

A comprehensive table detailing symptoms, conditions, and remedies for various operational errors.

Troubleshooting Criterion of Main Parts

Provides methods for checking key components like thermistors and motors for faults.

Troubleshooting Flow

Detailed step-by-step troubleshooting flowcharts for specific components and errors.

Check of Remote Controller and Indoor Electronic Control P.C. Board

Check of Indoor P.C. Board and Indoor Fan Motor

How to Check Miswiring and Serial Signal Error

Detailed steps to diagnose and resolve miswiring and serial signal communication issues.

Test Point Diagram and Voltage

Diagrams showing test points and voltage specifications on the unit's P.C. boards for diagnostics.

Disassembly Instructions

Removing the Indoor Power P.C. Board and Electrical Box

Removing the Indoor Electronic Control P.C. Board

Removing the Indoor Fan Motor, Indoor Coil Thermistor and Line Flow Fan