Fujitsu AUUH18LUAS Service Manual page 165

Release condition
•
– Model: AOUH18LUAS1
Depending on the triggering condition, different release conditions apply.
• Normal defrost operation
The defrost operation is released when either one of the conditions below is satisfied.
Outdoor unit heat exchanger temperature
(after 1 minute or later since compressor start)
Compressor operation time
• Integrating defrost (constant monitoring)
The defrost operation is released when either one of the conditions below is satisfied.
Outdoor unit heat exchanger temperature
(after 1 minute or later since compressor start)
Compressor operation time
– Models: AOUH24LUAS1, AOUH30LUAS1, and AOUH36LUAS1
The defrost operation is released when either one of the conditions below is satisfied.
Outdoor unit heat exchanger temperature
(after 1 minute or later since compressor start)
Compressor operation time
55.4°F (13°C) or more (Ta ≤ 33.8°F [1°C])
50.0°F (10°C) or more (Ta > 33.8°F [1°C])
55.4°F (13°C) or more
53.6°F (12°C) or more
- (04-27) -
15 minutes
15 minutes
15 minutes
6. Defrost operation control