Off Defrost Operation Control - Fujitsu As*A09Lkc Service Instructions Manual
Split type room air conditioner wall mounted type inverter
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20. OFF DEFROST OPEARTION CONTROL
When operation stops in the [Heating operation] mode, if frost is adhered to the outdoor unit heat
exchanger, the defrost operation will proceed automatically. In this time, if indoor unit operation
lamp flashes slowly (7 sec ON / 2 sec OFF), the outdoor unit will allow the heat exchanger to defrost,
and then stop.
1. OFF DEFROST OPERATION CONDITION
In heating operation, the outdoor heat exchanger temperature is less than -4°C, and
compressor operation integrating time lasts for more than 30 minutes.
2. OFF DEFROST END CONDITION
AS*A09/ 12LKC
OFF Defrost Flow Chart
Outdoor heat exchanger temperature:
Below -4°C
and
Compressor integrating operation:
Over 30 minutes
Outdoor heat exchanger temperature:
Over 16°C or
Compressor ON time: Over 15 minutes
Outdoor heat exchanger temperature sensor value is higher than 16°C or
Compressor operation time has passed 15 minutes.
Heating operation stop
Defrost start
Defrost Indicater:
[Operation lamp]
7 sec ON / 2 sec OFF
Defrost end
Release Condition
01-16
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