6-1. Defrost operation in heating operation stopped
If the outdoor unit is frosted when stopping the heating operation, it stops after performing the auto-
matic defrosting operation.
In this time, if the indoor unit operation lamp flashes slowly (6 sec on/2 sec off), the outdoor unit al-
low the heat exchanger to defrost, and then stop.
• Triggering condition
→hen all of the following conditions are satisfied in heating operation
– Compressor operation integrating time: 30 minutes or more
– Compressor continuous operation time: 10 minutes or more
– Outdoor unit heat exchanger temperature: 24.8°F (-4°C) or less
• 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)
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])
Compressor operation time 15 minutes
• 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)
55.4°F (13°C) or more
Compressor operation time 15 minutes
– 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)
53.6°F (12°C) or more
Compressor operation time 15 minutes
6-1. Defrost operation in heating operation stopped - (04-28) - 6. Defrost operation control
CONTROL AND
FUNCTIONS
CONTROL AND
FUNCTIONS
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