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Only for training and service purposes
Part 4 Trouble Shooting
Trouble analysis
1. Check temperature difference between intake and discharge air, and operating current.
All amount of refrigerant leaked out.
Check refrigeration cycle.
Refrigerant leakage
Clog of refrigeration cycle
Defective compressor
Excessive amount of refrigerant
Normal
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.
NOTICE
Temp. difference : approx. 0°C(1°F)
Current : less than 80% of
rated current
Temp. difference : approx. 8°C(16°F)
Current : less than 80% of
rated current
Temp. difference : less than 8°C
(16°F)
Current : near the rated
current
Temp. difference : over 8°C(16°F)
Temp. Difference
Operating Current
5. Cycle Troubleshooting Guide