Compressor Preheating; Economy Operation; Defrost Operation Control - Fujitsu ARG60LHTA Service Instruction

1-15. COMPRESSOR PREHEATING

When the outdoor temperature is lower than 20°C and the all operation mode has been
stopped for 30 minutes, power is applied to the compressor and the compressor is heated.
(By heating the compressor, warm air is quickly discharged when operation is started.)
When operation was started and when the outdoor temperature rises to 26°C or greater,
preheating is ended.

1-16. ECONOMY OPERATION

The ECONOMY operation functions by pressing ECONOMY button on the remote controller.
The ECONOMY operation is almost the same operation as below settings.
( Table9 )
Mode
Target temperature

1-17. DEFROST OPERATION CONTROL

1. CONDITION OF STARTING THE DEFROST OPERATION
The defrost operation starts as shown in the following Table 10, 11, and 12.
( Table 10 : Condition of 1st defrost operation)
1st defrost
after
starting operation
( Table 11 : Condition of 2nd defrost operation)
From 2nd and later
defrost after
starting operation
( Table 12 : Condition of Integrating defrost operation)
Integratingdefrost
(Constant monitoring)
2. CONDITION OF THE DEFROST OPERATION COMPLETION
Defrost operation is released when the conditions becomes as shown in Table 13.
( Table 13 : Condition of defrost release )
Outdoor heat exchanger temperature is higher than
Compressor operation time has passed 15 minutes.
AMP Air Conditioning
Cooling/ Dry
Setting temp.+1°C Setting temp.-1°C
Compressor integrating operation time
Less than 22 minutes
Outdoor heat exchanger temperature
Does not operate
Compressor integrating operation time
Less than 35 minutes
Does not operate
Compressor integrating operation time
More than 240 minutes
( For long continuous operation )
Outdoor heat exchanger temperature
Below -3°C
If the compressor continuous operation time is less than 10 minutes,
the OFF number of the compressor is counted.
If any defrost operated, the compressor OFF count is cleared.
Release Condition
or
Heating
More than 22 minutes
Below -9°C
More than 35 minutes
Outdoor heat exchanger temperature
Below -10°C
Less than 10 minutes
( For intermittent operation )
OFF count of the compressor
40 times
10°C
01-14
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More than 62 minutes
Outdoor heat exchanger temperature
Below -5°C