13-12
CONTROL SYSTEM
Revision Y05-01
Service Manual - DNG Series
(b) In RC and SH groups, whenever COMP & HE are both OFF, excluding
protection modes, IFAN operation will be according to the following:
In WAX, flour mounted or mobile models, IFAN switches to LOW for 30
sec and then stops.
In other models IFAN will operate in low speed for 30 sec and then stop. If
COMP is OFF for more than 3 minutes and IFEEL Mode is inactive, IFAN
will operate in low speed according to the following graph:
(c) In RH group, IFAN starts when HE starts. When HE switches to OFF, IFAN
switches to LOW for 30 sec and then stops.
13.5.3 HE operation
(a) For all Groups, HE can be ON only when IFAN is ON.
(b) For all Groups, HE switches to OFF when ICT > 50
o
c, and is activated
again when ICT d 45
o
c.
(c) In RH group, HE operation is according to the difference between RAT and
SPT (see Sect 4.3, 4.4).
(d) In SH or RC group, HE operation is limited by the following graph:
HE
ON
OFF
30
45 50
ICT [
o
c]
15
General :
For WAX :
35
20
40
(f) Back-up mode for SH group
After COMP (or WVL) 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 (IFAN as in 4.0.3.a,
and HE as in 4.0.4.d).
SPT+4 SPT+6 ICT [
o
c]
ON
OFF
IFAN (Low Speed)
To Next Page
Loading...
