Mitsubishi Electric MXZ-5C42NA3-U1 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

Mitsubishi Electric MXZ-5C42NA3-U1 Specifications

General

Brand	Mitsubishi Electric
Model	MXZ-5C42NA3-U1
Category	Heat Pump
Language	English

Summary

SERVICE MANUAL OUTDOOR UNIT

2 SAFETY PRECAUTION

General Safety and R410A Handling Precautions

Covers general safety rules and specific precautions for R410A refrigerant.

Service Cautions and Required Tools

R410A Refrigerant Piping Work Cautions

Guidelines for refrigerant piping, including thickness and flare dimensions.

7 WIRING DIAGRAM

MXZ-2C20NA2 Wiring Diagram

Details the wiring connections for the MXZ-2C20NA2 model.

MXZ-2C20NA3 Wiring Diagram

Details the wiring connections for the MXZ-2C20NA3 model.

MXZ-2C20NA4 Wiring Diagram

Details the wiring connections for the MXZ-2C20NA4 model.

MXZ-3C24NA Wiring Diagram

Details the wiring connections for the MXZ-3C24NA model.

8 REFRIGERANT SYSTEM DIAGRAM

MXZ-2C Series Refrigerant Flow Diagram

Illustrates the refrigerant flow for MXZ-2C series outdoor units.

MXZ-3C Series Refrigerant Flow Diagram

Illustrates the refrigerant flow for MXZ-3C series outdoor units.

MXZ-4C Series Refrigerant Flow Diagram

MXZ-5C Series Refrigerant Flow Diagram

11 SERVICE FUNCTIONS

Pre-Heat Control Settings

Auto Line Correcting Function

Details the auto line correcting feature and its activation.

12 TROUBLESHOOTING

Cautions on Troubleshooting

Safety and preparatory steps before troubleshooting.

Failure Mode Recall Function

Outdoor Unit Failure Mode Recall Flowchart

Outdoor Unit Failure Mode Recall Table

Lists failure modes, LED indications, conditions, and remedies.

12-3. INSTRUCTION OF TROUBLESHOOTING

General Troubleshooting Guidance

12-4. TROUBLESHOOTING CHECK TABLE

Detailed Troubleshooting Check Table

Detailed table of symptoms, indications, and remedies.

12-6. TROUBLESHOOTING FLOW

Check of Power Supply

Check Miswiring and Serial Signal Error

12-7. TEST POINT DIAGRAM AND VOLTAGE

Outdoor Control P.C. Board Layout

13 DISASSEMBLY INSTRUCTIONS

MXZ-2C Series Disassembly