Fujitsu ASUH09LPAS Service Manual page 111

– Model: AOUH12LPAS1
• 1st time defrosting after starting operation
Compressor integrating
operation time
Condition
• 2nd time and after
Compressor integrating
operation time
Condition
• Integrating defrost (Constant monitoring)
Compressor integrating
operation time
Condition
*: If the compressor continuous operation time is less than 10 minutes, the number of the
compressor off is counted. If any defrost operated, the compressor off count is cleared.
Release condition
•
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
Less than 17 min.
Does not operate
Less than 40 min.
Does not operate
More than 240 min. (For
long continuous
operation)
Tn ≤ 26.6°F (-3°C)
- (04-23) -
17 to 57 min.
Tn ≤ 15.8°F (-9°C) and
Tn-Ta ≥ 9.0°F (5°C)
More than 40 min.
Tn-Tn10 < -9.0°F (-5°C) (Tn ≤ 21.2°F [-6°C])
Tn-Tnb < -3.6°F (-2°C) (Tn ≤ 21.2°F [-6°C])
Tn ≤ 1.4°F (-17°C) (Ta ≥ 14.0°F [-10°C])
Tn ≤ 19.4°F (-7°C) or Tn ≤ -4.0°F (-20°C) (Ta <
14.0°F [-10°C])
More than 213 min. (For
long continuous
operation
Tn ≤ 23.0°F (-5°C)
60.8°F (16°C) or more
More than 57 min.
Tn ≤ 23.0°F (-5°C)
Less than 10 min.* (For
intermittent operation)
Count of the compressor
off: 40 times
15 minutes
6. Defrost operation control