Large-split heatpump, Xii. thermistor fault indication, Heat overload protection algorithm – Fedders R407C User Manual
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XII. Thermistor fault indication
The electronic controller flashes the filter LED when a thermistor fault is detected. The filter
LED blinking according to the time specified until the thermistor fault is rectified.
1. Heat Overload Protection Algorithm
Large-Split Heatpump
Large Split Heat Mode Protection Control Sequence *
Legend:
Comp. -
Compressor
OD
-
Outdoor
* Indoor fan runs according to section IV cool fan prevention in heat mode.
Comp. ON
OD Fan ON
ID Fan Set
Comp. ON
OD Fan ON
ID Fan Set
Comp. ON
OD Fan OFF
ID Fan High
Comp. OFF
OD Fan OFF
ID Fan High
Comp. ON
OD Fan ON
ID Fan Set
Comp. ON
OD Fan ON
ID Fan Set
Comp. ON
OD Fan OFF
ID Fan High
Comp. ON
OD Fan OFF
ID Fan High
Comp. OFF
OD Fan OFF
ID Fan High
Indoor coil
thermistor
46
°
C
50
°
C
65
°
C