Coil Heating Control (Compressor Warm Up Process) - Carrier 30AWH004HB Service Manual

Coil heating control (compressor warm up process)

crankcase heater. The control purpose is to prevent slackness of refrigerant inside the compressor.
the system when the control has interrupted the compressor warm up process.
3. A judgment for electricity is performed by TD and TO sensors. In the event of TO sensor failure, a backup control is auto-
matically performed by TE sensor (judging the TO sensor defect checking the outdoor LED display).
4. The right coil heating is controlled by TD and TE sensor.
004 006-008
L 10W 10W
M 30W 30W
NOTIFICATION
It is not an abnormal phenomenon
that electro-noise may be heard
while heating the coil.
SM_30AW.indd 68
012 015
25W 40W*
50W 40W
Control management
008 size
68
5
TO: Outdoor
Temperature
TE: Entering
(in Heat
exchanger)
temperature
TD: Discharge
temperature
30AW
14-03-2011 14:45:17