Heat Controller BG-123G Manuel D’Utilisation

5. PROTECTION FUNCTION

5.1 Symbol & Meaning

TA: Indoor ambient temperature;
TE: Indoor evaporator temperature;
TS: Setting temperature through the remote controller.

5.2 Protection Function



3 minute compressor time delay

The compressor will wait for 3 minutes before restarting, so as to prevent the pressure
imbalance in refrigerant system from resulting in compressor rotor locking.



Anti-freezing protection in cooling or dry mode

Anti-freezing function is activated according to TE.

If TE is lower than 33.8°F (1

℃) for 14 minutes, the evaporator anti-freezing protection will be

activated. The compressor will turn off for 5 minutes. 5 minutes later, if the evaporator pipe

temperature is still lower than 33.8°F (1

℃), the compressor remain off; when it gets higher

than 33.8°F (1

℃), the compressor will restart and the antifreeze function will be cancelled.

Note:

If the compressor stops operation, the time will be cleared.

If the fan motor turns to High speed or the indoor ambient temperature gets over 78.8°F

(26

℃), the time will keep inactive, not be cleared.



Anti-frosting protection and defect at cooling or dry mode

After compressor runs for 3 minutes, if TE is less than 5°F (-15℃) for the subsequent 3
minutes, the anti-frosting protection will be activated and the compressor will stop for the
following 6 minutes. After that time, if the condition for de-frosting function is met again in the
following 10 minutes while the compressor is operating, the unit will display ‘

Ed’ to indicate that

the unit is in the defrost mode defect. The compressor and fan motor will turn OFF


Note: The Defect display can be cancelled only by pressing the ON/OFF button on the unit

or the remote controller.

Service Manual

Room Air Conditioner with R-410A

Heat Controller, Inc.