12-11
CONTROL SYSTEM
Revision Y05-01
Service Manual - ALPHA
12.6.3 HE
operation
•
For
all Groups
, HE can be ON only when IFAN is ON.
•
For
all Groups
, HE switches to OFF when ICT > 50
o
c, and is activated
again when ICT
≤
45
o
c.
•
In
SH or RC group
, HE operation is limited by the following graph:
•
Back-up mode for
SH group
After COMP has been working for 5 minutes, HE & IFAN are activated even
if the ICT is still below 35
o
c. This situation is called Back-up Mode. Both
HE & IFAN will work in Back-up Mode until the ICT reaches 35
o
c. Then, the
operation goes on in the usual mode .
HE
ON
OFF
30
45
50
ICT [
o
c]
15
General :
For WAX :
35
20
40
