Electra DNG 18 Service Manual page 75

CONTROL SYSTEM
(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
again when ICT d 45
(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:
(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
Mode. Both HE & IFAN will work in Back-up Mode until the ICT reaches
o
35 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).
13-12
IFAN (Low Speed)
ON
OFF
SPT+4 SPT+6
o
c.
HE
ON
OFF
General : 30 35
For WAX : 15 20
Revision Y05-01
CONTENT
o
ICT [ c]
o
c, and is activated
o
ICT [ c]
40 45 50
o
c. This situation is called Back-up
Service Manual - DNG Series