Fujitsu AW?Z24LBC, Service Instruction

Page: 30 / 97

20. 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)
AW * Z24LBC
AW * Z24LBC
AW * Z24LBC
1 time defrosting
after starting
operation
ST
Defrosting after 2
time upon starting
operation
ND
Compressor operating time
Less than 17 minutes 17 to 60 minutes
60 minutes to 4 hours
After 4 hours
Does not operate - 9 C - 5 C - 3 C
Less than 35 minutes
35 minutes to
4 hours
Does not operate
Compressor operating time
After 4 hours
- 3 C - 6 C
(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)
Release Condition
Outdoor heat exchanger temperature sensor value is higher than 13 C or
Compressor operation time has passed 15 minutes.
05-16