Panasonic CU-A73KE User Manual

Service Manual
Room Air Conditioners
Contents
● Features ..........................................................1
● Functions ...................................................2 – 4
● Product Specifications .............................5 – 10
● Dimensions ............................................11 – 12
● Refrigeration Cycle Diagram .........................13
● Block Diagram ............................................... 14
● Wiring Diagram ..............................................15
● Operation Details ...................................16 – 30
● Installation Information ..........................31 – 32
● 2-way, 3-way Valves..............................33 – 39
● Servicing Information .............................40 – 42
● Troubleshooting Guide .......................... 43 – 44
● Technical Data.......................................45 – 48
● Exploded View ...................................49, 51, 53
● Replacement Parts List .....................50, 52, 54
● Electronic Parts List .......................................55
CS-A73KE / CU-A73KE
CS-A93KE / CU-A93KE
CS-A123KE / CU-A123KE
ORDER NO. MAC9902015C2
 1999 Matsushita Air-Conditioning Corp. Sdn. Bhd.
(183914D)
All rights reserved. Unauthorized copying and distribu-
tion is a violation of law.
Untitled-16 6/19/00, 11:26 AM1

Panasonic CU-A73KE Specifications

General

Brand	Panasonic
Model	CU-A73KE
Category	Air Conditioner
Language	English

Summary

Functions

Remote Control Functions

Product Specifications

General Specifications

Provides core technical data including capacity, power, dimensions, and noise.

Component Specifications

Operation Details

Cooling Mode Operation

Explains the cooling mode operation, including safety controls.

Soft Dry Mode Operation

Details the soft dry mode operation and its specific controls.

Heating Mode Operation

Describes the heating mode operation and associated controls.

Automatic Mode Operation

Fan Speed and Airflow Control

Economy & Powerful Modes

2-way • 3-way Valve

Evacuation of Installation

Procedure for evacuating air from the system during installation.

Pumping down

Procedure for pumping down refrigerant before disconnecting.

Evacuation of Re-installation

Procedure for evacuating air during re-installation.

Balance refrigerant

Procedure for balancing refrigerant in the system.

Evacuation

Procedure for system evacuation when no refrigerant is present.

Gas charging

Procedure for charging the system with refrigerant after evacuation.

Troubleshooting Guide

Refrigeration Cycle System Troubleshooting

Diagnosing issues based on refrigeration cycle parameters.

Pressure and Electric Current Relationships

Correlates operating conditions with pressure and electric current readings.

Compressor and 4-way Valve Malfunctions

Methods for diagnosing faults in the compressor and 4-way valve.

Technical Data

Thermostat Characteristics

Graphs showing thermostat behavior in Cooling, Soft Dry, and Heating modes.

Operation Characteristics (Cooling)

Performance charts for cooling capacity, current, and pressure vs. temperature.

Operation Characteristics (Heating)

Piping Length Characteristics (Cooling)

Piping Length Characteristics (Heating)

Replacement Parts List

Indoor Unit Parts List

Outdoor Unit Parts List (CU-A73KE / CU-A93KE)

Outdoor Unit Parts List (CU-A123KE)