Airwell ONG3-17 R410A, Service Manual

Page: 46 / 127

CONTROL SYSTEM
Service Manual-CN Fixed RPM series
12-11
12.5 HEATING MODE
12.5.1 Heating Mode – General
1. In heating Mode, temp. compensation schedule will be activated for wall mounted,
ducted models, and ceiling mounted (i.e. NKN, CN, and NFC) according to the following
table:
Add to SPT
SPT [
o
c]
I-FEEL ON I-FEEL OFF
18 d SPT d 27 0
o
c +2
o
c
27 < SPT d 30 0
o
c +3
o
c
Notes :
1) compensation will be activated in Forced operation modes
2. RV is OFF in RH group.
3. 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
x
at the 30 second
(4)
after the COMP is switched ON. In this
case, the IFAN will be started at low speed
(5)
.
IFAN Speed
Any
Low
Stop
30 35 40
ICT [
o
c]
Notes :
.
1) 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.
2) An exception to this rule is the Back-up mode for SH group. 3)
3) If the IFAN is turned ON by the 30 seconds operation, its minimum operation
time before stopping due to low ICT temperature is 60 sec.