Fujitsu ASU9RLQ User Manual

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 13.
(Table 13 : Condition of starting Defrost Operation)
ASU9RLQ
ASU12RLQ
ASU18CL
ASU18RL
ASU9RLQ
ASU12RLQ
ASU18RL
1 time defrosting
after starting
operation
ST
Compressor operating time
Less than 20 minutes 20 to 60 minutes
60 minutes to 4 hours
After 4 hours
Does not operate
- 16°F(-9°C)
- 16°F(-9°C)
-
- 16°F(-9°C)
- 23°F(-5°C)
- 23°F(-5°C)
-
- 23°F(-5°C)
- 27°F(-3°C)
-
- 27°F(-3°C)
- 27°F(-3°C)
ASU9RLQ
ASU12RLQ
ASU18CL
ASU18RL
Defrosting after 2
time upon starting
operation
nd
Less than 35 minutes
35 minutes to
4 hours
Does not operate
Compressor operating time
After 4 hours
- 27°F(-3°C)
- 27°F(-3°C)
-
- 27°F(-3°C)
- 21°F(-6°C)
- 21°F(-6°C)
-
- 21°F(-6°C)
(2). CONDITION OF THE DEFROST OPERATION COMPLETION
Defrost operation is released when the conditions become as shown in Table 14.
(Table 14 : Defrost Release Condition)
Release Condition
Outdoor heat exchanger temperature sensor value is higher than 61°F(16°C) or
Compressor operation time has passed 15 minutes.
Outdoor heat exchanger temperature sensor value is higher than 61°F(16°C) or
Compressor operation time has passed 15 minutes.
Outdoor heat exchanger temperature sensor value is higher than 50°F(10°C) or
Compressor operation time has passed 15 minutes.
05-14

Fujitsu ASU9RLQ Specifications

General

Brand	Fujitsu
Model	ASU9RLQ
Category	Air Conditioner
Language	English