Troubleshooting Guide

Troubleshooting Guide

CycleTroubleshooting Guide

Trouble analysis

1. Check temperature difference between intake and discharge air, and operating current.

Temp. Difference

Operating Current

 

Temp. difference

: approx. 0°C(0°F)

All amount of refrigerant leaked out.

 

Current

: less than 80% of

 

Check refrigeration cycle.

 

 

 

rated current

 

 

 

 

 

 

Refrigerant leakage

 

 

 

 

Temp. difference

: approx. 8°C(14.4°F)

 

Current

: less than 80% of

Clog of refrigeration cycle

 

 

rated current

Defective compressor

 

 

 

 

 

 

 

 

 

Temp. difference

: less than 8°C(14.4°F)

Excessive amount of refrigerant

 

Current

: near the rated cur-

 

 

 

 

rent

 

 

 

 

 

Temp. difference : over 8°C(14.4°F)

Normal

Notice:

Temperature difference between intake and discharge air depends on room air humidity. When the room air humidity is relatively higher, temperature difference is smaller. When the room air humidity is relatively lower temperature difference is larger.

2. Check temperature and pressure of refrigeration cycle.

Suction pressure

Temperature

 

 

(Compared with

(Compared with

Cause of Trouble

Description

the normal value)

the normal value)

 

 

 

 

 

 

 

High

Defective compressor

Current is low.

Higher

 

 

 

Normal

Excessive amount of

High pressure does not quickly

 

 

 

refrigerant

rise at the beginning of operation.

 

 

 

 

 

 

Insufficient amount of

Current is low.

Lower

Higher

refrigerant(Leakage)

 

 

 

Clogging

 

 

 

 

 

Notice:

1.The suction pressure is usually 4.5~6.0 kg/cm2G at normal condition.

2.The temperature can be measured by attaching the thermometer to the low pressure tubing and wrap it with putty.

32Ceiling Cassette Air Conditioner

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LG Electronics LCN240CP service manual Cycle Troubleshooting Guide, Trouble analysis

LCN240CP specifications

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