7. DEFROST OPERATION CONTROL
01-16
1. CONDITION OF STARTING DEFROST OPERATION
Defrost operation starts when outdoor heat-exchanger temperature sensor (Tn) detects
the temperature lower than the values shown below.
2. CONDITION OF DEFROST OPERATION COMPLETION
Defrost operation is released when outdoor
heat-exchanger temperature sensor value is higher than 16°C
or compressor operation time has passed 15 minutes.
1st time defrosting after starting operation
2nd time and after
Compressor
integrating
operation time
Compressor
integrating
operation time
Less than 22 min.
22 to 62 min.
Ta : Outdoor temperature
More than 62 min.
(Does not operate)
Condition
Condition
Compressor
integrating
operation time
Condition
Tn ≤ -9°C
and Tn - Ta ≥ 5deg
Tn ≤ -5°C
Less than 40 min.
More than 40min.
Integrating defrost (Constant monitoring)
More than 240 min.
(For long continuous
operation)
Less than 10min.*1
(For intermittent operation)
- 3°C
More than 213 min.
(For long continuous
operation)
- 5°C
OFF count of the compressor
40 times.
*1 : If the compressor continuous operation time is less than 10 minutes,
the OFF number of the compressor is counted.
If any defrost operated, the compressor OFF count is cleared.
Tn10 : Temperature of continuous operation at 10minutes.
Tnb : Back 5minutes temperature
(Does not operate)
Tn ≤ -17°C
When Ta ≥ -10°C
When Ta < -10°C
1 Tn ≤ -20°C
2 Tn ≤ Ta - 7°C
3 Tn-Tn10< -5°C (and Tn ≤ -6°C)
4 Tn-Tnb< -2°C (and Tn ≤ -6°C)
