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Mitsubishi Electric MXZ-3C24NA User Manual

Mitsubishi Electric MXZ-3C24NA
154 pages
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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

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Mitsubishi Electric MXZ-3C24NA Specifications

General IconGeneral
SeriesMXZ
RefrigerantR410A
Indoor Units SupportedUp to 3
Number of Zones3
Compressor TypeInverter
Outdoor Unit Noise Level49 dB(A)
Cooling Capacity24000 BTU/h
Heating Capacity27, 000 BTU/h
Power Supply208/230V, 1-phase, 60Hz
Indoor Unit Noise LevelVaries by indoor unit
Indoor Unit Dimensions (HxWxD)Varies by indoor unit
Indoor Unit WeightVaries by indoor unit
TypeMulti-Zone Heat Pump

Summary

Technical Changes

Safety Precautions

Always Observe for Safety

Essential safety rules to follow before and during repair services for user safety.

Cautions Related to R410A Refrigerant

Specific safety guidelines for handling R410A refrigerant and associated piping work.

Part Names and Functions

Specification

Noise Criteria Curves

Outlines and Dimensions

Wiring Diagram

Refrigerant System Diagram

Max. Refrigerant Piping Length & Pipe Size Selection

Guidelines for refrigerant pipe length and diameter selection for multi-system configurations.

Data

Operating Range

Specifies operational limits for cooling and heating based on indoor and outdoor conditions.

Capacity and the Input Curves

Charts showing capacity and input correction factors based on operating conditions.

Capacity and Input Correction by Means of Inverter Output Frequency

Graphs illustrating capacity and input adjustments based on inverter output frequency.

Outdoor Low Pressure and Outdoor Unit Current

Performance curves showing outdoor low pressure and unit current vs. ambient temperature.

Actuator Control

Service Functions

Pre-Heat Control

Manages compressor protection against moisture and refrigerant liquefaction.

Auto Line Correcting

Function for automatic detection and correction of wiring or piping errors.

Changing the Set Refrigerant Evaporating Temperature

Instructions for adjusting the refrigerant evaporating temperature setting.

Troubleshooting

Cautions on Troubleshooting

Essential safety precautions and checks before starting troubleshooting procedures.

Failure Mode Recall Function

How to recall and interpret stored failure codes indicated by LED lights.

Instruction of Troubleshooting

Flowchart and guide for diagnosing and resolving common operational issues.

Troubleshooting Check Table

Detailed table mapping LED indications to abnormal points, conditions, and remedies.

Troubleshooting Criterion of Main Parts

Troubleshooting Flow

Test Point Diagram and Voltage

Outdoor Control P.C. Board

Diagram and voltage specifications for the outdoor control printed circuit board.

Outdoor Power P.C. Board

Diagram and voltage specifications for the outdoor power printed circuit board.

Disassembly Instructions

Removing the Cabinet and the Panels

Step-by-step guide for safely removing external panels and the cabinet.

Removing the Outdoor Control P.C. Board, the Reactor, the Outdoor Power P.C. Board, and the Heatsink

Procedure for disassembling internal electronic components and the reactor.

Removing the Fan Motor

Instructions for removing the outdoor unit's fan motor.

Removing the Compressor and 4-Way Valve

Steps for safely removing the compressor and the 4-way refrigerant valve.

Removing the Expansion Valve

Procedure for removing the expansion valve from the refrigerant circuit.

Before Using the Service Port (High Pressure Side)

Guidance on accessing the service port for maintenance.

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