Troubleshooting Guide - LG ATNH126ELFB Service Manual

Troubleshooting Guide

Troubleshooting Guide
Cycle Troubleshooting Guide
Trouble analysis
1. Check temperature difference between intake and discharge air, and operating current.
Temp. Difference
Operating Current
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
(Compared with (Compared with
the normal value) the normal value)
Higher
Lower
Notice:
1. The suction pressure is usually 4.5~6.0 kg/cm
2. The temperature can be measured by attaching the thermometer to the low pressure tubing and wrap it with
putty.
112 Synchro Air Conditioner
Temp. difference
Current
Temp. difference
Current
Temp. difference
Current
Temp. difference
Temperature
High Defective compressor
Normal Excessive amount of
refrigerant
Insufficient amount of
Higher refrigerant(Leakage)
Clogging
G at normal condition.
2
: approx. 0°C
All amount of refrigerant leaked out.
: less than 80% of
Check refrigeration cycle.
rated current
Refrigerant leakage
: approx. 8°C
Clog of refrigeration cycle
: less than 80% of
Defective compressor
rated current
: less than 8°C
Excessive amount of refrigerant
: near the rated
current
: over 8°C Normal
Cause of Trouble Description
Current is low.
High pressure does not quickly
rise at the beginning of operation.
Current is low.