Classic Air Conditioners MRNC12AS - 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.

Summary

Precaution

Safety Precaution

Guidelines to prevent injury and property damage during operation and installation.

Warning

Critical warnings related to installation, operation, and handling of the air conditioner.

Wiring Diagram

Indoor Unit Wiring Diagram

Outdoor Unit Wiring Diagram

Installation Details

First-Time Installation

Electronic Function

Main Protection

Details various protection mechanisms and safety features of the inverter module and compressor.

Operation Modes and Functions

Describes the different operating modes like cooling, heating, drying, and auto, along with fan control.

Troubleshooting

Indoor Unit Error Display

Lists error codes and their corresponding LED status for indoor unit malfunctions.

Outdoor Unit Error Display

Diagnosis and Solution

Provides diagnostic procedures and solutions for specific error codes like E0/F4 and E1.

Classic Air Conditioners MRNC12AS Specifications