Sharp AY-X127E - User Manual

AH-X127E
AU-X127E
AY-X127E
AE-X127E
1
SHARP CORPORATION
S4709AYX127E/
SPLIT TYPE
ROOM AIR CONDITIONERS
In the interests of user-safety (Required by safety regulations in some
countries) the set should be restored to its original condition and only
parts identical to those specified should be used.
SERVICE MANUAL
Page
SPECIFICATIONS ................................................................................................................................................. 2
EXTERNAL DIMENSIONS..................................................................................................................................... 4
WIRING DIAGRAMS............................................................................................................................................. 5
ELECTRICAL PARTS ............................................................................................................................................ 8
BLOCK DIAGRAM ..................................................................................................................................................9
MICROCOMPUTER CONTROL SYSTEM.......................................................................................................... 11
FUNCTION AND OPERATION OF PROTECTIVE PROCEDURES ................................................................... 26
BREAKDOWN DIAGNOSIS PROCEDURE ........................................................................................................ 29
REFRIGERATION CYCLE ................................................................................................................................. 31
PERFORMANCE CURVES ................................................................................................................................ 34
DISASSEMBLING PROCEDURE ....................................................................................................................... 35
OPTION ............................................................................................................................................................... 45
REPLACEMENT PARTS LIST ............................................................................................................................. 47
TABLE OF CONTENTS
MODELS
INDOOR UNIT
AH-X127E
AY-X127E
AU-X127E
AE-X127E
OUTDOOR UNIT

Summary

Specifications

Wiring Diagrams

LED Indication for Self-Diagnosis

Details LED patterns for self-diagnosis and corresponding abnormal conditions.

Control System Diagrams

Microcomputer Control System Overview

Introduces the microcomputer control system.

Electronic Control Circuit Diagram (AH-X127 E)

Detailed electronic circuit diagram for the AH-X127E model's control system.

Electronic Control Circuit Diagram (AU-X127 E)

Detailed electronic circuit diagram for the AU-X127E model's control system.

Electronic Control Circuit Diagram (AY-X127 E)

Detailed electronic circuit diagram for the AY-X127E model's control system.

Electronic Control Circuit Diagram (AE-X127 E)

Detailed electronic circuit diagram for the AE-X127E model's control system.

Functions

Indoor Unit Functions

Details on indoor unit operations and controls.

Indoor Temperature Adjustment

Describes proportional and integral controls for temperature adjustment.

Indoor Fan Control

Outdoor Unit Functions

Details outdoor unit operations and controls.

Defrost Operation

Frequency Control

Protection Mechanisms

Function and Operation of Protective Procedures

Heat Exchanger Overheating Protection

Electrical Protection

Compressor and Thermistor Protection

Refrigerant Cycle

Disassembling Procedure

Indoor Unit Disassembly Procedure

Step-by-step instructions for disassembling the indoor unit.

Servicing Procedure

Outdoor Unit Servicing Procedure

Step-by-step instructions for servicing the outdoor unit.

Sharp AY-X127E Specifications

General

Power Supply	220-240V, 50Hz
Outdoor Unit Weight	30 kg
Type	Split System
Noise Level (Outdoor Unit)	52 dB(A)
Outdoor Unit Dimensions (W x H x D)	780 x 540 mm