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12-14
CONTROL SYSTEM
SM DLSDCI 3-A.1 GB
12.4.4
Heating Mode
12.4.4.1 Heating - General
a. Mode Definition
Mode: HEAT, AUTO (at heating)
Temp: Selected desired temperature
Fan: LOW, MED, HIGH, TURBO, AUTO.
Timer: Any
I-FEEL: ON or OFF
b. Room Temperature, RT, is detected by:
RAT in normal operation, or
RCT (R/C sensor) in I-FEEL mode.
c. Indoor Coil Temp is detected by ICT.
12.4.4.2 Control Functions
a.
COMP
Operation
In general – the operation is set by the NLOAD calculation in indoor unit side.
Other rules are according to section 12.5.1
.
b.
OFAN
Operation
In normal operation OFAN operates together with the COMP.
Other rules are according to section 12.5.3
.
c.
IFAN
operation:-
IFAN will operates according heat mode rules. See section 12.4.2.3.
d.
RV
is ON during HEAT mode.
e.
HEATERS
– See section 12.4.9.
f.
PUMP
is OFF during heat mode.
12.4.4.3 Sequence Diagram
Maintains room temp. at desired level by comparing RAT or RCT to SPT.
TROUBLESHOOTING
Service Manual
0
+1
+2
+3
-3
-2
-1
(RT - SPT) [
C]
COMP
OFAN
IFAN
RV
ON
OFF
ON
OFF
OFF
ON
OFF
User Fan Speed
COMP Speed
decrease
COMP Speed
increase
OFAN Speed
decrease
OFAN Speed
increase
See IFAN Rules