13-11
CONTROL SYSTEM
Revision Y05-01Service Manual - DNG Series
13.5 Heating Mode
13.5.1 Heating Mode - General
In heating Mode, temp. compensation schedule will be activated for wall mounted and
ducted models (i.e. FCD/RWK, ELD, ECC, WAX, WMF and WMN/WHX) according to
the following table:
Add to SPT SPT [
o
c]
I-FEEL ON I-FEEL OFF
18 d SPT d 27
0 °c +2 °c
27 < SPT d 30
0 °c +3 °c
13.5.2 IF operating rules
(a) As a general rule for RC and SH groups, when COMP is ON, excluding
protection modes, IFAN will be switched ON if
x ICT > 35
o
c (or 40
o
c for EMD/ELD, 20
o
c for WAX), or
x at the IFTC second
(4)
after the COMP is switched ON. In this
case, the IFAN will be started at low speed
(5)
. The default IFTC
values are:
0 sec for EMD/ELD models
15 sec for WMN4/RWK(FCX) models
600 sec for WVL (including IFC) models
30 sec for all other models
IFAN Speed
Any
Low
Stop
30 35 40
EMD/ELD
EMD/ELD
ICT [
o
c]
15 20 25
General :
For WAX :
Notes :
1) In EMD/ELD models, the IFAN will start if ICT t 40
o
c at any IFAN
speed, and will stop if ICT < 30
o
c.
2) In SH or RC group, if HE is set to OFF due to low ICT, IFAN will be
switched to LOW and will be turned OFF after 30 sec.
3) An exception to this rule) is the Back-up mode for SH group. 4) If
the IFAN is turned ON by the IFTC operation, its minimum operation
time before stopping due to low ICT temperature is 60 sec.
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