Electra EMD 27 - Protection; Cooling Mode Protections; Indoor Coil Defrost

7-24
CONTROL SYSTEM
Revision Y05-01
Service Manual - EMD Series
7 Protection
7.1. Cooling Mode Protections
7.1.1. Indoor Coil Defrost
Mode: Cooling, Dry, Auto
Temp: Selected desired temp.
Fan: Any
Timer: Any
I Feel: On or Off
Control Function
Protect the indoor coil from ice formation at low ambient temperature.
ICT [
o
c]
+2
ON
OFF
ON
OFF
t1 t2 t3
COMP
OFAN
+1
+5
+14
0
-1
ON
OFF
IFAN
t1
t1 = 5 min minimum for each COMP starting
t2 = OFAN cycling (alternate between ON and OFF every 30 sec) for 20 min maximum
t3 = COMP and OFAN stop for 10 min minimum