Electra GC18 ST/RC, Service Manual

Page: 80 / 159

CONTROL SYSTEM
11-14 SM PXD 1-E.3 GB
e. Heaters operation rules for RH groups:
1) In RH group, HE operation is according to the difference between RAT and
SPT.
-1 0 2
T=SP-R T [
o
c]
H E 1
H E 2
O N
O N
O FF
O FF
f. OFAN Operation for RC and SH groups
1) As a general rule for RC and SH groups, excluding protection modes, OFAN
starts with the compressor.
2) When OFAN is ON it will operate according to the following conditions:
a) OFAN operates together with the compressor.
b) When
50 ) 2 (
ICT and SPT RT
and the 4.7k resistor is not
connected to the OCT, OFAN will operate according to the following
curve:
0 3
O N
O F F
O C T
O F AN
CONTENT