Filter
Top Products
- 65 -
Service Manual
Troubleshooting Guide
Trouble analysis
1. Check temperature difference between intake and discharge air, as well as the operating current.
All of the refrigerant many have
leaked out.
Restriction in the refrigeration cycle.
Refrigerant leakage
Clog of refrigeration cycle
Defective compressor
Excessive amount of refrigerant
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.
Notice:
1. The suction pressure is usually 4.5~6.0 kg/cm
2
(64.0~85.34psi) at normal condition.
2. The temperature can be measured by attaching the thermometer to the low pressure tubing and wrapping it
with putty.
Temp. difference : approx. 0°C(0°F)
Current : less than 80% of
rated current
Temp. difference : approx. 8°C
(14.4°F)
Current : less than 80% of
rated current
Temp. difference : less than 8°C
(14.4°F)
Current : near the rated cur-
rent
Temp. difference : over 8°C
(14.4°F)
Temp. Difference
Operating Current
Suction pressure Temperature
(Compared with (Compared with Cause of Trouble Description
the normal value) the normal value)
High Defective compressor Current is low.
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
or Refrigerant Cycle Restrictions.
Higher
Cycle Troubleshooting Guide