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Mitsubishi Electric MUZ-LN35VGHZ2-E1 User Manual

Mitsubishi Electric MUZ-LN35VGHZ2-E1
86 pages
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SERVICE MANUAL
Models
OUTDOOR UNIT
Indoor unit service manual
MSZ-LN•VGW/V/B/R Series (OBH766)
PARTS CATALOG (OBB768)
HFC
utilized
R32
MUZ-LN25VGHZ
-
E1
,
ER1
,
ET1
MUZ-LN35VGHZ
-
E1
,
ER1
,
ET1
MUZ-LN50VGHZ
-
E1
,
ER1
,
ET1
,
E2
MUZ-LN25VGHZ2
-
E1
,
ER1
,
E2
,
E3
,
SC1
,
ER2
MUZ-LN35VGHZ2
-
E1
,
ER1
,
E2
,
E3
,
SC1
,
ER2
MUZ-LN50VGHZ2
-
E1
,
SC1
,
ER1
CONTENTS
1. TECHNICAL CHANGES ······························3
2. SERVICING PRECAUTIONS FOR UNITS
USING REFRIGERANT R32 ·························4
3. PART NAMES AND FUNCTIONS ··················6
4. SPECIFICATION ········································7
5. NOISE CRITERIA CURVES ························10
6. OUTLINES AND DIMENSIONS ··················· 12
7. WIRING DIAGRAM ··································· 15
8. REFRIGERANT SYSTEM DIAGRAM ··········· 21
9. PERFORMANCE CURVES ························24
10. ACTUATOR CONTROL ····························· 43
11. SERVICE FUNCTIONS ······························ 44
12. TROUBLESHOOTING ······························· 45
13. DISASSEMBLY INSTRUCTIONS ·················69
MUZ-LN25VGHZ
MUZ-LN35VGHZ
No. OBH768
REVISED EDITION-G
OBH768 REVISED EDITION-F is void.
Revision G:
MUZ-LN25/35VGHZ2-
E3
,
SC1
,
ER2
and
MUZ-LN50VGHZ2-
E1
,
SC1
,
ER1
have
been added.
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Mitsubishi Electric MUZ-LN35VGHZ2-E1 Specifications

General IconGeneral
Cooling Capacity3.5 kW
Heating Capacity4.0 kW
Power Supply220-240 V, 50 Hz
RefrigerantR32
Outdoor Noise Level49 dB(A)
Indoor Noise Level19 dB(A)

Summary

Technical Changes and Revisions

Servicing Precautions for R32 Refrigerant Units

Information on Servicing

Safety checks and workspace preparation for flammable refrigerants.

Checks on Refrigeration Equipment

Checks on components and markings for safety.

Checks on Electrical Devices

Safety checks for electrical components and wiring.

Repairs to Sealed Components

Safety precautions for working on sealed components.

Repair to Intrinsically Safe Components

Precautions for working on intrinsically safe components.

Cabling

Checking cabling for wear and adverse effects.

Part Names and Functions Overview

Unit Specifications

Noise Criteria Curves

Outlines and Dimensions

Wiring Diagrams

Refrigerant System Diagrams

Performance Curves and Operating Conditions

Guaranteed Voltage

Specifies the operational voltage range for the unit.

Airflow

Instruction to set airflow to MAX.

Main Readings

Lists key readings for performance testing.

Guaranteed Outdoor Temperature

Defines the temperature range for guaranteed operation.

Actuator Control Logic

Outdoor Fan Motor Control

Describes fan motor operation interlocking with the compressor.

R.V. Coil Control

Details the control logic for the reversing valve (R.V.) coil.

Relation Between Main Sensor and Actuator

Outlines how sensors interact with actuators in the system.

Service Functions and Settings

Change in Defrost Setting

Instructions for changing the defrost finish temperature.

Pre-Heat Control Setting

Explains how to activate or deactivate pre-heat control.

Troubleshooting Guide

12-1. Cautions on Troubleshooting

Safety precautions and initial checks before troubleshooting.

12-2. Failure Mode Recall and Check Table

Functions and tables for diagnosing failure modes.

12-5. Troubleshooting Flows and Procedures

Workflow, noise troubleshooting, and diagnostic flows.

12-6. Test Point Diagram and Voltage

Diagrams and voltage specifications for diagnosing the inverter P.C. board.

Disassembly Instructions by Model

MUZ-LN25/35VGHZ Models Disassembly

Disassembly instructions for specific MUZ-LN25/35VGHZ models.

MUZ-LN25/35VGHZ2 Suffix Models Disassembly

Disassembly for specific MUZ-LN25/35VGHZ2 models with suffixes.

MUZ-LN50VGHZ Disassembly

Disassembly instructions for the MUZ-LN50VGHZ model.

MUZ-LN50VGHZ2 Disassembly

Disassembly instructions for the MUZ-LN50VGHZ2 model.

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