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Mitsubishi Electric MXZ-3C24NAHZ - User Manual

Mitsubishi Electric MXZ-3C24NAHZ
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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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Summary

Technical Changes

Safety Precautions

General Safety Precautions

Essential safety guidelines and procedures for handling the equipment before and during servicing.

R410 A Refrigerant Handling

Specific safety rules and cautions for working with R410A refrigerant, including necessary tools.

Service Tools for R410 A

Lists necessary tools and their specifications for R410A refrigerant service operations.

Refrigerant Piping Work Guidelines

Instructions for refrigerant piping, covering pipe thickness, flare dimensions, and torque specifications.

Part Names and Functions

Specification

Noise Criteria Curves

Outlines and Dimensions

Wiring Diagram

Refrigerant System Diagram

Data

Operating Range Specifications

Defines the operational temperature limits and guaranteed voltage for various models.

Capacity and Input Correction Curves

Graphs showing capacity and input correction factors based on temperature and class.

Outdoor Low Pressure & Unit Current

Graphs illustrating outdoor low pressure and unit current at fixed frequencies and dry-bulb temperatures.

Actuator Control

Sensor and Actuator Relations

Table detailing the relationship between sensors and actuators for various models.

Service Functions

Pre-Heat Control Function

Activates compressor heating to prevent moisture issues and improve startup, consuming approx. 50W.

Auto Line Correcting Feature

Detects and corrects wiring/piping errors automatically; provides LED status indications.

Refrigerant Evaporating Temperature Setting

Procedure to adjust refrigerant evaporating temperature, with warnings about potential dew drop.

Troubleshooting

Troubleshooting Cautions & Preparation

Safety guidelines and preparatory steps before commencing troubleshooting procedures.

Failure Mode Recall Functionality

Method for recalling and interpreting memorized fault codes via LED indicators.

Troubleshooting Diagnostic Flow

Visual flowcharts guiding the diagnosis of operational issues based on LED indicators and symptoms.

Outdoor Unit Failure Check Table

Comprehensive table mapping LED blink patterns to specific faults, conditions, and remedies.

Troubleshooting Criterion of Main Parts

Troubleshooting Flow

Test Point Diagram and Voltage

Outdoor Control P.C. Board Diagnostics

Detailed diagram of the outdoor control P.C. board showing test points, voltages, and component locations.

Outdoor Power P.C. Board Diagnostics

Detailed diagram of the outdoor power P.C. board showing test points, voltages, and component locations.

Disassembly Instructions

Disassembly: MXZ-2 C20 NA Series

Step-by-step guide with figures for disassembling the cabinet, panels, and components of specific models.

Disassembly: MXZ-3 C24;30 NA & MXZ-4 C36 NA Series

Step-by-step guide with figures for disassembling panels and components of specific models.

Disassembly: MXZ-5 C42 NA Series & HZ Models

Step-by-step guide with figures for disassembling panels and components of specific outdoor units.

Mitsubishi Electric MXZ-3C24NAHZ Specifications

General IconGeneral
SeriesMXZ
TypeMulti-Zone Heat Pump
HSPF10.0
RefrigerantR410A
Indoor Units Supported3
Number of Zones3
Voltage208/230V
Outdoor Unit Noise Level49 dB(A)
Cooling Capacity24000 BTU/h
Compressor TypeInverter
Power Supply1 Phase, 60 Hz
Outdoor Unit Dimensions (HxWxD)880x840x330 mm
Indoor Unit Weight10 kg
Heating Capacity27, 000 BTU/h
Indoor Unit Noise LevelVaries by indoor unit model

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