Mitsubishi Electric MXZ-5C42NA 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-5C42NA Specifications

General

Type	Multi-zone
Series	MXZ
Cooling Capacity	42, 000 BTU/h
Heating Capacity	48, 000 BTU/h
Number of Zones	5
Voltage	208/230V
Compressor Type	Inverter
Refrigerant	R410A
Operating Temperature (Cooling)	14°F to 115°F
Indoor Unit Dimensions (HxWxD)	Varies by indoor unit model
Indoor Unit Weight	Varies by indoor unit model
Indoor Unit Compatibility	Multiple indoor units available

Summary

1 TECHNICAL CHANGES

2 SAFETY PRECAUTION

2-1. ALWAYS OBSERVE FOR SAFETY

General safety measures to follow before and during repair work.

2-2. CAUTIONS RELATED TO R410A REFRIGERANT

Specific safety warnings and handling instructions for R410A refrigerant.

2-3. Cautions for refrigerant piping work

Guidelines for safe and proper refrigerant piping installation and considerations.

3 PART NAMES AND FUNCTIONS

4 SPECIFICATION

5 NOISE CRITERIA CURVES

6 OUTLINES AND DIMENSIONS

7 WIRING DIAGRAM

8 REFRIGERANT SYSTEM DIAGRAM

Operating Range

Defines the operational temperature limits for cooling and heating.

MAX. REFRIGERANT PIPING LENGTH & PIPE SIZE SELECTION

Specifies maximum piping lengths and dimensions for refrigerant lines.

9 DATA

10 ACTUATOR CONTROL

11 SERVICE FUNCTIONS

11-1. PRE-HEAT CONTROL

Function to energize compressor winding to prevent moisture issues.

11-2. AUTO LINE CORRECTING

Automatically detects and corrects improper wiring or piping.

11-3. CHANGING THE SET REFRIGERANT EVAPORATING TEMPERATURE

Adjusts refrigerant evaporating temperature settings for specific conditions.

12 TROUBLESHOOTING

12-1. CAUTIONS ON TROUBLESHOOTING

Safety precautions and initial checks before troubleshooting.

12-2. FAILURE MODE RECALL FUNCTION

How to recall and interpret stored failure codes for diagnosis.

12-3. INSTRUCTION OF TROUBLESHOOTING

Step-by-step guide for diagnosing outdoor unit malfunctions.

12-4. TROUBLESHOOTING CHECK TABLE

Detailed table of symptoms, LED indications, conditions, and remedies.

12-5. TROUBLESHOOTING CRITERION OF MAIN PARTS

Specifications and resistance values for checking key components.

12-6. TROUBLESHOOTING FLOW

Diagnostic flowcharts for specific operational issues.

13 DISASSEMBLY INSTRUCTIONS