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) |
| 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 |
|
|
|
All amount of refrigerant leaked out. Check refrigeration cycle.
Refrigerant leakage
Clog of refrigeration cycle
Defective compressor
Excessive amount of refrigerant
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.
56Multi type Air Conditioner