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Mitsubishi Electric MUCFH-24NV- E3 - User Manual

Mitsubishi Electric MUCFH-24NV- E3
72 pages
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SERVICE MANUAL
Wireless type
Models
MCFH-13NV-
(WH)
·MUCFH-13NV-
MCFH-18NV-
(WH)
·MUCFH-18NV-
·MUCFH-18NV-
MCFH-24NV-
(WH)
·MUCFH-24NV-
E3E3
E4
E3E3
E4E4
No. OB267
REVISED EDITION-A
(When installed on the ceiling)
(When installed on the floor)
FLOOR AND CEILING TYPE AIR CONDITIONERS
• Refer to service manual OB212 for MCFH-13/18/24/NV- , MUCFH-13/18/24/NV- ,
MCFH-13/18/24/NV- and MUCFH-13/18/24/NV- .
• Refer to service manual OB240 for MCFH-13NV- and MUCFH-13NV- .
• Refer to service manual OB185 REVISED EDITION-C for MCFH-13NV- or MCFH-18NV- is
connected with MXZ-32NV- .
• Refer to service manual OB227 REVISED EDITION-B for MCFH-13NV- or MCFH-18NV- is
connected with MXZ-32RV- .
• Refer to service manual OB254 for MCFH-13NV- or MCFH-18NV- is connected with
MXZ-32SV- .
As for parts lists, all sub number’s series are included.
E1
E3E4
E1
E3E4
E2
E3E4
E3E3
E2E2
E1E1
Revision:
MUCFH-18NV- has been added.
MUCFH-18NV- MUCFH-18NV-
•Path of outdoor heat exchanger has changed .
•Temperature range of high pressure protection has
changed.
•Please void OB267.
E4E3
E4
CONTENTS
1. TECHNICAL CHANGES ····································2
2. PART NAMES AND FUNCTIONS······················2
3. SPECIFICATION·················································5
4. NOISE CRITERIA CURVES·······························6
5. OUTLINES AND DIMENSIONS ·························7
6. WIRING DIAGRAM ··········································10
7. REFRIGERANT SYSTEM DIAGRAM··············14
8. PERFORMANCE CURVES······························16
9. MICROPROCESSOR CONTROL ····················32
10. SERVICE FUNCTIONS·····································41
11. TROUBLESHOOTING······································42
12. DISASSEMBLY INSTRUCTIONS·····················55
13. PARTS LIST······················································63
14. OPTIONAL PARTS ······················BACK COVER
OB267--1.qxp 01.12.19 2:58 PM Page 1

Questions and Answers

Summary

TECHNICAL CHANGES

Model-Specific Technical Changes

Describes modifications for different model series and versions, including revisions to components and operating parameters.

OUTDOOR UNIT PARTS OVERVIEW

Outdoor Unit Components and Accessories

Lists structural components and accessories for the outdoor unit, such as heat exchangers, fans, and service panels.

REMOTE CONTROLLER FUNCTIONS

Remote Controller Components and Operation

Describes the remote control's parts, including signal transmission, display, buttons, and basic operation.

TECHNICAL SPECIFICATIONS

Indoor and Outdoor Unit Specifications

Details technical data like capacity, power supply, airflow, dimensions, and sound levels for indoor and outdoor units.

NOISE CRITERIA CURVES

DIMENSIONS AND INSTALLATION CLEARANCES

Indoor Unit Dimensions and Clearances

Provides physical size and installation space requirements for the indoor unit.

Outdoor Unit Dimensions and Clearances

Details physical size and installation space requirements for outdoor units.

WIRING DIAGRAMS

Indoor Unit Wiring Diagrams

Electrical schematics illustrating the internal wiring connections of the indoor units.

Outdoor Unit Wiring Diagrams

Electrical schematics illustrating the internal wiring connections of the outdoor units.

REFRIGERANT SYSTEM DIAGRAMS

Refrigerant Circuit Diagrams

Visual representation of the refrigerant path, including components like the compressor and heat exchangers.

REFRIGERANT PIPING SPECIFICATIONS

Refrigerant Piping Limits and Charging

Guidelines for maximum piping length, height difference, and additional refrigerant charging requirements.

PERFORMANCE CURVES

Cooling Performance Curves

Graphical data illustrating cooling capacity and total input under varying conditions.

Heating Performance Curves

Graphical data illustrating heating capacity and total input under varying conditions.

Measuring Temperature Differences for Performance

Instructions for measuring temperatures to analyze performance differences.

OPERATING PRESSURE AND CURRENT DATA

Cool Operation Pressure and Current

Data on outdoor low pressure and unit current during cooling operation.

Heat Operation Pressure and Current

Data on outdoor low pressure and unit current during heating operation.

DETAILED COOLING PERFORMANCE DATA (220 V)

DETAILED COOLING PERFORMANCE DATA (240 V)

DETAILED HEATING PERFORMANCE DATA (220 V)

DETAILED HEATING PERFORMANCE DATA (240 V)

MICROPROCESSOR CONTROL SYSTEM

Remote Controller and Basic Operation

Covers remote functions, display, and 'I FEEL CONTROL' mode operation.

Mode-Specific Operations and Controls

Details operations for DRY, HEAT modes, and Outdoor Fan control.

DEFROSTING OPERATION

Defrosting Conditions and Timing

Details starting, releasing, and timing of the defrost cycle.

OPERATING MODES AND CONTROLS

Cool, Dry, and Heat Mode Operations

Specific parameters and operations for COOL, DRY, and HEAT modes.

R.V. Coil Control

Details on the operation and control of the R.V. coil.

AUTO VANE OPERATION

Vane Control Modes and Behavior

Covers vane motor drive, positioning, auto mode, stop, dew prevention, and swing.

TIMER OPERATION

Timer Setting and Cancellation Procedures

Procedures for setting, cancelling, and programming timers.

EMERGENCY AND AUTO RESTART FUNCTIONS

Emergency-Test Operation Procedures

Procedures for test runs and emergency operations using the dedicated switch.

Auto Restart Functionality

How the unit resumes operation after a power interruption, including memorized settings.

SERVICE FUNCTIONS

Compulsory Defrosting and Setting Adjustments

Manual defrost activation and adjustments to defrost parameters.

Timer Short Mode and PC Board Configuration

Timer adjustments and modifications for multi-unit operation.

TROUBLESHOOTING

General Troubleshooting and Precautions

Safety checks, initial steps, and remote battery replacement for troubleshooting.

Symptom Diagnosis and Diagnostic Flowcharts

Flowcharts for identifying problems based on observed symptoms.

Troubleshooting Check Tables and Fault Analysis

Tables correlating symptoms with causes and check points for fault diagnosis.

Component-Specific Troubleshooting Checks

Detailed checks for thermistors, compressor, coils, fan motors, boards, and wiring.

TEST POINT DIAGRAMS AND VOLTAGES (INDOOR UNIT)

DEICER P.C. BOARD DIAGRAM AND TEST POINTS

DISASSEMBLY INSTRUCTIONS (INDOOR UNIT)

Removing Indoor Unit Control Board and Fan Motor

Steps to remove the indoor control board and fan motor assembly.

Removing Indoor Heat Exchanger and Related Parts

Steps to remove the indoor heat exchanger and other associated components.

OUTDOOR UNIT DISASSEMBLY

Cabinet and Deicer Board Removal

Steps to remove the outdoor unit's cabinet and deicer P.C. board.

Fan Motor and Compressor Removal

Steps to remove the outdoor fan motor and compressor.

Heat Exchanger and Other Outdoor Parts Removal

Steps to remove the heat exchanger and other outdoor components.

PARTS LIST

Indoor Unit Parts

Lists structural and electrical parts for the indoor unit.

Outdoor Unit Parts

Lists structural and electrical parts for the outdoor unit.

Accessories and Remote Controller Parts

Lists available accessories and remote controller components.

OPTIONAL PARTS

Air Cleaning Filter Information

Details on the disposable air cleaning filter, including replacement recommendations.

Deodorizing Filter Maintenance

Information on cleaning and replacing the deodorizing filter.

Mitsubishi Electric MUCFH-24NV- E3 Specifications

General IconGeneral
BrandMitsubishi Electric
ModelMUCFH-24NV- E3
CategoryAir Conditioner
LanguageEnglish

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