Mitsubishi Electric MXZ-2C20NAHZ4-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-2C20NAHZ4-U1 Specifications

General

Series	MXZ
Coefficient of Performance (COP)	4.0
Refrigerant	R410A
Maximum Number of Connectable Indoor Units	2
Cooling Capacity	20, 000 BTU
Power Supply	208/230V, 1Ph, 60Hz
Operating Temperature Range (Cooling)	14°F to 115°F

Summary

Technical Changes

Technical Changes Overview

Lists model additions and revisions to specifications and diagrams.

Safety Precautions

General and R410A Refrigerant Safety

Covers general repair safety and specific cautions for R410A refrigerant.

Wiring Diagrams

MXZ-NA Series Wiring Diagrams

Wiring diagrams for MXZ-NA, NA2, NA3, NA4 models.

MXZ-NAHZ Series Wiring Diagrams

Wiring diagrams for MXZ-NAHZ, NAHZ2, NAHZ3, NAHZ4 models.

Refrigerant System Diagrams

MXZ-NA Series Refrigerant Systems

Refrigerant system diagrams for MXZ-NA series models.

MXZ-NAHZ Series Refrigerant Systems

Operating Range and Conditions

Operating Conditions

Capacity and Input Correction Curves

MXZ-NA Series Capacity and Input Curves

MXZ-NAHZ Series Capacity and Input Curves

Inverter Output Frequency Correction

MXZ-NA Series Inverter Output Frequency Curves

MXZ-NAHZ Series Inverter Output Frequency Curves

Outdoor Unit Performance Curves

Single Operation Performance Curves

Multi-Unit Operation Performance Curves

Actuator Control

Sensor and Actuator Relationships

Service Functions

Pre-Heat Control Function

Function to energize compressor winding to prevent moisture issues.

Auto Line Correcting Function

Automatic detection and correction of wiring or piping errors.

Troubleshooting Guide

Troubleshooting Precautions and Procedures

Safety, failure recall, flowcharts, and general troubleshooting steps.

Troubleshooting Check Table and Part Criteria

Detailed table of symptoms, conditions, remedies, and part resistance checks.

Disassembly Instructions

MXZ-2C20 Series Disassembly

MXZ-3C24/3C30/4C36 Series Disassembly

MXZ-5C42NA / NAHZ Series Disassembly