Part 4 Trouble Shooting

5. CycleTroubleshootingGuide

Trouble analysis

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

Temp. Difference

Operating Current

 

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

 

 

 

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(16°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.

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Only for training and service purposes

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Heat Controller VMC12SB-1/VMH12SB-1, VMC09SB-1/VMH09SB-1, VMC18SB-1/VMH18SB-1 Cycle Troubleshooting Guide, Trouble analysis

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