Classic Air Conditioners MWNC09S User Manual

RevisionA:1403100001,Contentupdated.
ModelNumbers:
MWNC09S/MRNC09AS,MWHNC09S/MRHNC09AS,MWHNC09SA/MRHNC09ASA
MWNC12S/MRNC12AS,MWHNC12S/MRHNC12AS,MWH NC12SA/MRHNC12ASA
MWNC18S/MRNC18AS,MWHNC18S/MRHNC18AS,
MWNC24S/MRNC24AS,MWHNC24S/MRHNC24AS
COMFORT SERIES DC INVERTER AIR
CONDITIONER
SERVICE MANUAL
Mono DC
Table of Contents
1. Precaution
2. Part Names And Functions
3. Specification
4. Dimension
5. Refrigerant Cycle Diagram
6. Wiring Diagram
7. Installation Details
8. Operation Characteristics
9. Electronic Function
10. Troubleshooting
11. Disassembly Instructions
WARNING
 Installation MUST conform with local building codes or, in the absence of local codes, with the
National Electrical Code NFPA70/ANSI C1-1993 or current edition and Canadian Electrical
Code Part1 CSA C.22.1.
 The information contained in the manual is intended for use by a qualified service technician
familiar with safety procedures and equipped with the proper tools and test instruments
 Installation or repairs made by unqualified persons can result in hazards to you and others.
 Failure to carefully read and follow all instructions in this manual can result in equipment
malfunction, property damage, personal injury and/or death.
 This service is only for service engineer to use.

Classic Air Conditioners MWNC09S Specifications

General

Brand	Classic Air Conditioners
Model	MWNC09S
Category	Air Conditioner
Language	English

Summary

Safety and Precautions

General Safety Guidelines

Essential safety instructions for operation and installation, including warnings.

Part Names and Functions

Model Numbers and Components

Lists model numbers and identifies key indoor/outdoor unit parts with diagrams.

Unit Functional Features

Details the operational features and filters of the air conditioner units.

Dimension Specifications

Indoor and Outdoor Unit Dimensions

Provides physical measurements and mounting hole dimensions for units.

Refrigerant Cycle Diagram

Wiring Diagrams

Indoor and Outdoor Unit Wiring

Shows internal electrical connections for both indoor and outdoor units.

Installation Details

Installation Procedures and Guidelines

Covers torque specs, pipe length, first-time install, and refrigerant handling.

Operation Characteristics

Operating Temperature Ranges

Defines operating temperatures for cooling, heating, and drying modes.

Electronic Functionality

Protection Features and Operating Modes

Details protection mechanisms and operating modes like cooling, heating, and auto.

Troubleshooting

Troubleshooting Safety and Error Displays

Covers safety, indoor/outdoor error codes, and indicators for fault diagnosis.

Diagnostic Procedures

Step-by-step solutions for common error codes like E0/F4, E1, E2.

Component Checks and Charts

Sensor, Compressor, and IPM Checks

Procedures for testing temperature sensors, compressors, and IPM continuity.

Pressure and Resistance Charts

Provides pressure readings for cooling/heating and resistance values for components.