Powerful Operation; Compressor Preheating; Electronic Expansion Valve Control - Fujitsu AOUG12LZAH1 Service Manual

7-6. POWERFUL operation

The POWERFUL operation starts by pressing POWERFUL button on the remote controller.
The indoor unit and outdoor unit operate at maximum power as shown in the table below.
Compressor frequency
Fan mode
Vertical airflow direction
louver setting
Release condition:
• Cooling/Dry
Room temperature ≤ Setting temperature -0.5°C or Operation time has passed 20 minutes.
• Heating
Room temperature ≥ Setting temperature +0.5°C or Operation time has passed 20 minutes.

7-7. Compressor preheating

By preheating the compressor, warm airflow is quickly discharged when the operation is started.
• Triggering condition
– 30 minutes after compressor stopped.
– Outdoor unit heat exchanger temperature (Tn)
When the jumper wire (JM2) is disconnected:

7-8. Electronic expansion valve control

The most proper opening of the electronic expansion valve is calculated and controlled under the
present operating condition based on the table below.
Operation mode
Cooling/dry mode
Heating mode
NOTE: At the time of supplying the power to the outdoor unit, the initialization of the electronic ex-
pansion valve is operated (528 pulses are input to the closing direction).
7-6. POWERFUL operation
Cooling
Dry
Heating
Tn
-4°C
Tn
5°C
- (04-27) -
Maximum
POWERFUL
Tn
Off
-2°C
On
Tn
Off
7°C
On
Pulse range
Between 52 and 480 pulses
3
6
7. Various control