Fujitsu AOU36RLX Service Instruction

When the outdoor heat exchanger temperature is lower than Operation temperature (Refer to Table 8) and the heating
operation has
been stopped for 3 hours, 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 Release temperature or greater,
preheating
is over.
16. COMPRESSOR PREHEATING
(Table 8 : Preheating Operation / Release Temperature)
01-16
Before 24 hour After 24 hour
Operation
temperature
Operation
temperature
Release
temperature
Release
temperature
ABU18RULX
ABU24RULX
ABU36RSLX
ABU18RULX
ABU24RULX
ABU36RSLX
ABU18RULX
ABU24RULX
ABU36RSLX
37.4°F
(3°C)
44.6°F
(7°C)
32°F
(0°C)
39.2°F
(4°C)
17. 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 9.
(Table 9 : Condition of starting Defrost Operation)
Less than 6 min. *1
or 10min. *2
2. CONDITION OF THE DEFROST OPERATION COMPLETION
Defrost operation is released when the conditions become as shown in Table 10.
(Table 10 : Defrost Release Condition)
Release Condition
Outdoor heat exchanger temperature sensor value is higher than 53.6°F(12°C) or
Compressor operation time has passed 15 minutes.
*3. Outdoor temp. > 30.2°F (-1°C)
*4. Outdoor temp. < 30.2°F (-1°C)
*2. Compressor stop time: Below 20min. Select 6min.
Above 20min. Select 10min.
After 6 min. *1
or 10min. *2
Compressor integrating
operation :Less than 45min.
Compressor integrating
operation :45min and over
17.6
°F(-8°C) *3
14
°F (-10°C) *4
Does not operate
=
15. PUMP DOWN ( Refrigerant collecting operation )
*1. It means contiguous operation time.
When the product is stopped:
1. Press the PUMP DOWN switch (SW2) on the outdoor unit.
(The LED on the outdoor unit circuit board flickers every 1second.)
2. The pump down operation (cooling operation) begins right away.
After operation starts, close the 3-way valve (liquid).
3. After 2-3minutes, operation stops. Close the 3-way valve (gas) within 1minute after operations stops.
4. The LED will go out 3minutes after it stops. Disconnect the power supply after confirming that the LED has gone out.
When the product is operating:
1. Press the PUMP DOWN switch (SW2) on the outdoor unit. The LED on the outdoor unit circuit board flickers
every 1second, and operation stops.
At this point, recovery has not been completed, so do not close the 2 and 3-way valves.
2. The pump down operation (cooling operation) begins after 3minutes.
Close the 3-way valve (liquid) after operation starts.
3. After 2-3minutes, operation stops. Close the 3-way valve (gas) within 1minute after operations stops.
4. The LED will go out 3minutes after it stops. Disconnect the power supply after confirming that the LED has gone out.
Perform the following procedures to collect the refrigerant when moving the indoor unit or the outdoor unit.

Fujitsu AOU36RLX Specifications

General

Brand	Fujitsu
Model	AOU36RLX
Category	Air Conditioner
Language	English