Defrost Operation Control - Fujitsu ASYA07LCC Service Instruction

19. 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 ST time defrosting
after starting
operation
ST
Defrosting after 2
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)
ASYA07/09/12LCC
ASYB09/12LDC
ASYA14/18LCC
Less than 20 minutes 20 to 60 minutes 60 minutes to 4 hours
ASYA07/09LCC
ASYA12LCC
Does not operate
ASYB09/12LDC
ASYA14/18LCC
Less than 35 minutes
ASYA07/09LCC
ASYA12LCC
Does not operate
ASYB09/12LDC
ASYA14/18LCC
Outdoor heat exchanger temperature sensor value is higher than 16°C or
Compressor operation time has passed 15 minutes.
Outdoor heat exchanger temperature sensor value is higher than 16°C or
Compressor operation time has passed 15 minutes.
Outdoor heat exchanger temperature sensor value is higher than 10°C or
Compressor operation time has passed 15 minutes.
Compressor operating time
-9°C
-9°C
-9°C
-9°C
Compressor operating time
35 minutes to
4 hours
-6°C
-6°C
-6°C
-6°C
Release Condition
05-14
After 4 hours
-5°C -3°C
-3°C
-5°C
-5°C
-3°C
-5°C
-3°C
After 4 hours
-3°C
-3°C
-3°C
-3°C