Fresh Air Control; Compressor Preheating - Fujitsu ACUH09LUAS1 Service Manual
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Also See for ACUH09LUAS1:
- Design & technical manual (96 pages) ,
- Design & technical manual (96 pages)
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7-4. Fresh air control
The fan motor for Fresh Air is operated in synchronization with the indoor fan operation as below.
7-5. 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)
→hen the jumper wire (JM2) is disconnected:
7-4. Fresh air control
Operation
Fan motor
(Indoor unit)
Stop
Operation
Fan motor
(for Fresh Air)
Stop
Tn
24.8°F
(-4°C)
Tn
41.0°F
(5°C)
Tn
Off
28.4°F
(-2°C)
On
Tn
Off
44.6°F
(7°C)
On
- (04-26) -
7. Various control
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