Defrost Operation Control - Fujitsu AS*9LSACW Service Instructions Manual

18. DEFROST OPERATION CONTROL

(1). CONDITION OF STARTING THE DEFROST OPERATION
The defrost operation starts when the outdoor heat exchanger temperature sensor detects
the temperature lower than the values shown in Table 15.
(Table 15 : Condition of starting Defrost Operation)
1 time defrosting
ST
after starting
operation
Defrosting after 2
ST
time upon starting
operation
(2). CONDITION OF THE DEFROST OPERATION COMPLETION
Defrost operation is released when the conditions become as shown in Table 16.
(Table 16 : Defrost Release Condition)
AS*9LSACW
AS*12LSACW
AS*9LSBCW
AS*12LSBCW
AS*14LSBCW
AS*18LSBCW
Less than 20 minutes 20 to 60 minutes 60 minutes to 4 hours
AS*9LSACW
AS*12LSACW
AS*9LSBCW
Does not operate
AS*12LSBCW
AS*14LSBCW
AS*18LSBCW
Less than 35 minutes
AS*9LSACW
AS*12LSACW
AS*9LSBCW
Does not operate
AS*12LSBCW
AS*14LSBCW
AS*18LSBCW
Outdoor heat exchanger temperature sensor value is higher than 10degC or
Compressor operation time has passed 15 minutes.
Outdoor heat exchanger temperature sensor value is higher than 10degC or
Compressor operation time has passed 15 minutes.
Outdoor heat exchanger temperature sensor value is higher than 16degC or
Compressor operation time has passed 15 minutes.
Outdoor heat exchanger temperature sensor value is higher than 16degC or
Compressor operation time has passed 15 minutes.
Outdoor heat exchanger temperature sensor value is higher than 10degC or
Compressor operation time has passed 15 minutes.
Outdoor heat exchanger temperature sensor value is higher than 10degC or
Compressor operation time has passed 15 minutes.
Compressor operating time
- 9 C
- 9 C
- 9 C
- 9 C
- 9 C
- 9 C
Compressor operating time
35 minutes to
4 hours
- 6 C
- 6 C
- 6 C
- 6 C
- 6 C
- 6 C
Release Condition
05-14
After 4 hours
- 5 C - 3 C
- 5 C - 3 C
- 5 C
- 3 C
- 5 C
- 3 C
- 3 C
- 5 C
- 5 C
- 3 C
After 4 hours
- 3 C
- 3 C
- 3 C
- 3 C
- 3 C
- 3 C