Defrost Operation Control - Fujitsu Ab 14Lbaj Series Service Instruction

18. DEFROST OPERATION CONTROL

1. CONDITION OF STARTING THE DEFROST OPERATION
1-1. For AO*18LMAK2/ 24LMAM2
The defrost operation starts when the outdoor heat exchanger temperature sensor detects
the temperature lower than the values shown in Table 7-1.
(Table 7-1 : Condition of starting Defrost Operation)
Compressor integrating
operation :Less than 40min.
Does not operate
1-2. For AO*30LMAW4
The defrost operation starts when the outdoor heat exchanger temperature sensor detects
the temperature lower than the values shown in Table 7-2.
(Table 7-2 : Condition of starting Defrost Operation)
Compressor integrating
operation :Less than 45min.
Does not operate
2. CONDITION OF THE DEFROST OPERATION COMPLETION
2-1. For AO*18LMAK2/ 24LMAM2
Defrost operation is released when the conditions become as shown in Table 8-1.
(Table 8-1 : Defrost Release Condition)
Outdoor heat exchanger temperature sensor value is higher than 10°C or
Compressor operation time has passed 15 minutes.
2-2. For AO*30LMAW4
Defrost operation is released when the conditions become as shown in Table 8-2.
(Table 8-2 : Defrost Release Condition)
Outdoor heat exchanger temperature sensor value is higher than 12°C or
Compressor operation time has passed 15 minutes.
Compressor integrating
operation :40min and over
Less than 6 min. *1 After 6 min. *1
or 10min. *2
or 10min. *2
Compressor integrating
operation :45min and over
After 6 min. *1
Less than 6 min. *1
or 10min. *2 or 10min. *2
-8
-10
Release Condition
Release Condition
01-29
*1. It means contiguous operation time.
*2. Compressor stop time:
Below 20min.
°
-8 C
Above 20min.
*1. It means contiguous operation time.
*2. Compressor stop time:
Below 20min.
°
C *3
° Above 20min.
C *4
*3. Outdoor temp. > -1°C
*4. Outdoor temp. < -1°C
Select 6min.
Select 10min.
Select 6min.
Select 10min.
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