Fedders R407C User Manual
Page 65
F18
7.
Outdoor Coil De-icing in Heat Mode (applicable on Heat Pump Unit only)
The air-con controller heats up the outdoor coil to melt the ice formed at outdoor coil. To
achieve this, the compressor must be turned on, while the 4-way valve must be turned off.
During this period, the indoor fan must be switched off with exception condition as stated in
Note 1. otherwise it will fill the room with cool air and cause discomfort to the users.
Defrost Time Chart
Defrost thermistor below 40
°
C
Below –4
°
C
Compressor ON
OFF
4-way valve ON
OFF
Outdoor fan ON
OFF
Defrost counter
Indoor fan ON
OFF
*Low
Max 8 min
60 sec.
30 sec.
60 sec.
60 sec.
Hot start