Po→Erful Operation; Fresh Air Control; Compressor Preheating - Fujitsu ASUH18LMAS Service Manual

7-6. POWERFUL operation
The PO→ERFUL operation starts by pressing PO→ERFUL 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 -1°F (-0.5°C) or Operation time has passed 20 minutes.
• Heating
Room temperature ≥ Setting temperature +1°F (+0.5°C) or Operation time has passed 20 minutes.

7-7. Fresh air control

The fan motor for Fresh Air is operated in synchronization with the indoor fan operation as below.

7-8. Compressor preheating

By preheating the compressor, warm airflow is quickly discharged when the operation is started.
• Triggering condition 1
– Outdoor temperature ≤ 68°F (20°C)
→hen outdoor temperature reaches 78.8°F (26°C), compressor preheating stops.
– 30 minutes after compressor stopped
• Triggering condition 2
7-6. PO→ERFUL operation
Cooling
Dry
Heating
Operation
Fan motor
(Indoor unit)
Stop
Operation
Fan motor
(for Fresh Air)
Stop
Tn
Off
32.0°F
(0°C)
On
Tn: Outdoor unit heat exchanger temp.
ASUH18LMAS
6
Tn
35.6°F
(2°C)
- (04-25) -
ASUH24LMAS
Maximum
PO→ERFUL
3
5
7. Various control