Electra DNC series Service Manual page 90

2) HEs are operated according to the room temp., in the same
way as in Heating for RH group (Sect 4.3).
3) IFAN is operating continuously at low speed.
4) Pumps operation is described in Sect 7.3 and 7.4.
4) For MBX model, HE1 and HE2 will be activated simultaneously
as the HE1 above.
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.
o
ICT [ c]
+14
+5
+2
+1
0
-1
-6
t1 t2
ON
OFAN
OFF
ON
COMP
OFF
ON
IFAN
OFF
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
Notes:
1. When J7 is closed (connected), OFAN cycling is cancelled and the
set temperature for COMP & OFAN cut-out and cut-in are
Service Manual - DNC Series
t3 t1
J7 OPEN
Revision Y05-01
CONTENT
CONTROL SYSTEM
t1
J7 CLOSED
8-23