Mitsubishi Electric MXZ-2C20NAHZ3 - User Manual

PARTS CATALOG (OBB702)
SERVICE MANUAL
OUTDOOR UNIT
Models
MXZ-2C20NA2 -
U1
,
U4
MXZ-2C20NAHZ
MXZ-2C20NA3
-
U1
MXZ-2C20NAHZ2 -
U1
MXZ-2C20NA4 -
U1
MXZ-2C20NAHZ3 -
U1
MXZ-3C24NA MXZ-2C20NAHZ4 -
U1
MXZ-3C24NA2 -
U1
MXZ-3C24NAHZ
MXZ-3C24NA3
-
U1
MXZ-3C24NAHZ2 -
U1
MXZ-3C24NA4 -
U1
MXZ-3C24NAHZ3 -
U1
MXZ-3C30NA MXZ-3C24NAHZ4 -
U1
MXZ-3C30NA2 -
U1
MXZ-3C30NAHZ
MXZ-3C30NA3
-
U1
MXZ-3C30NAHZ2 -
U1
MXZ-3C30NA4 -
U1
MXZ-3C30NAHZ3 -
U1
MXZ-4C36NA MXZ-3C30NAHZ4 -
U1
MXZ-4C36NA2 -
U1
MXZ-4C36NA3 -
U1
MXZ-4C36NA4 -
U1
MXZ-5C42NA
MXZ-5C42NA2
-
U1
MXZ-5C42NA3 -
U1
MXZ-5C42NA4 -
U1
No. OBH702
REVISED EDITION-N
Indoor unit service manual
MSZ-FE·NA Series (OBH542)
MSZ-FH·NA Series (OBH683)
MSZ-GE·NA Series (OBH548)
MSZ-GL·NA Series (OBH732)
MSZ-EF·NA Series (OBH736)
MSZ-FS·NA Series (OBH872)
MFZ-KA·NA Series (OBH568)
MFZ-KJ·NA Series (OBH752)
SLZ-KA·NA Series (OCH487)
SLZ-KF·NA.TH Series (OCH669)
PLA-A·BA Series (OCH420)
PLA-A·EA Series (OCH640)
SEZ-KD·NA Series
PEAD-A·AA Series
PCA-A·KA Series (OCH455)
MVZ-A·AA Series
SVZ-KP·NA Series (MD-1404-K019)
CONTENTS
• INDOOR / OUTDOOR UNIT
COMPATIBILITY TABLE ······················4
1. TECHNICAL CHANGES ······························8
2. SAFETY PRECAUTION ·······························9
3. PART NAMES AND FUNCTIONS ················13
4. SPECIFICATION ······································ 14
5. NOISE CRITERIA CURVES ························30
6. OUTLINES AND DIMENSIONS ··················· 33
7. WIRING DIAGRAM ··································· 39
8. REFRIGERANT SYSTEM DIAGRAM ··········· 62
9. DATA ······················································ 75
10. ACTUATOR CONTROL ··························· 106
11. SERVICE FUNCTIONS ···························· 107
12. TROUBLESHOOTING ······························110
13. DISASSEMBLY INSTRUCTIONS ··············· 141
HFC
utilized
R410A
Revision N:
• 4. SPECIFICATION and 8. REFRIGERANT
SYSTEM DIAGRAM have been corrected.
OBH702 REVISED EDITION-M is void.
MXZ-3C24NA MXZ-3C30NA MXZ-4C36NA
MXZ-3C24NA2 MXZ-3C30NA2 MXZ-4C36NA2
MXZ-3C24NA3 MXZ-3C30NA3 MXZ-4C36NA3
MXZ-3C24NA4 MXZ-3C30NA4 MXZ-4C36NA4

Summary

Technical Changes

Safety Precautions

Always Observe for Safety

General safety rules to follow before starting any work.

Cautions Related to R410 A Refrigerant

Specific safety guidelines for handling R410A refrigerant.

Part Names and Functions

Specifications

Noise Criteria Curves

Outlines and Dimensions

Wiring Diagram

Refrigerant System Diagram

Data

Actuator Control

Service Functions

Pre-Heat Control

Manages compressor heating to prevent issues from refrigerant liquefaction.

Auto Line Correcting

Automatically detects and corrects improper wiring or piping.

Changing the Set Refrigerant Evaporating Temperature

Adjusts refrigerant evaporating temperature settings for optimal performance.

Troubleshooting

Cautions on Troubleshooting

Important safety and procedural notes before starting troubleshooting.

Failure Mode Recall Function

How to recall and interpret stored failure codes for diagnosis.

Instruction of Troubleshooting

A flowchart guiding the troubleshooting process based on unit indicators.

Troubleshooting Check Table

A table correlating LED indications with specific faults and their remedies.

Troubleshooting Criterion of Main Parts

Provides resistance and voltage criteria for checking key components.

Troubleshooting Flow

Step-by-step diagnostic flowcharts for specific operational issues.

Test Point Diagram and Voltage

Diagrams showing test points and voltage measurements on control boards.

Disassembly Instructions

MXZ-2 C20 NA2 MXZ-2 C20 NA3 MXZ-2 C20 NA4

Instructions for disassembling specific model series, focusing on panel removal.

MXZ-3 C24 NA MXZ-3 C30 NA MXZ-4 C36 NA

Instructions for disassembling specific model series, focusing on panel removal.

MXZ-5 C42 NA MXZ-2 C20 NAHZ MXZ-3 C24 NAHZ MXZ-3 C30 NAHZ

Instructions for disassembling specific model series, focusing on panel removal.

Mitsubishi Electric MXZ-2C20NAHZ3 Specifications