Fresh Air Control; Compressor Preheating - Fujitsu ABYG18KRTA Service Manual
Ceiling type air conditioner
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Also See for ABYG18KRTA:
- Design & technical manual (113 pages) ,
- Service manual (482 pages) ,
- Design & technical manual (381 pages)
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7-5. Fresh air control
The fan motor for Fresh Air is operated in synchronization with the indoor fan operation as below.
7-6. Compressor preheating
By preheating the compressor, warm airflow is quickly discharged when the operation is started.
• Models: AOYG18KBTB, AOYG22KBTB, and AOYG24KBTB
– Triggering condition
• 30 minutes after compressor stopped.
• Outdoor unit heat exchanger temperature (Tn)
When the jumper wire (JM2) is disconnected:
• Models: AOYG30KBTB, AOYG36KBTB, and AOYG45KBTB
– Triggering condition 1
• Outdoor temperature ≤ 20°C
When outdoor temperature reaches 26°C, compressor preheating stops.
• 30 minutes after compressor stopped
– Triggering condition 2
7-5. Fresh air control
Operation
Fan motor
(Indoor unit)
Stop
Operation
Fan motor
(for Fresh Air)
Stop
-2°C
5°C
Tn
Off
0°C
On
Tn: Outdoor unit heat exchanger temp.
Tn
Tn
Off
-4°C
On
Tn
Tn
Off
7°C
On
Tn
2°C
- (04-32) -
7. Various control
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