7-2 Heat Mode Operation
(RT - SPT) [
o
c]
+1
0
-1
-2
-3
H
OFF
L
M
ON
OFF
Note 1
Note 2
COMP
IFAN
RV
ON
OFF
30 sec
The Heat Mode operation is similar to the Cool Mode operation. The COMP, OFAN and IFAN are mainly
controlled by the value of (RT – SPT). In the graph above, the IFAN is operating in Auto Fan speed mode.
Therefore, the IFAN speed changes automatically according to the (RT - SPT).
Note 1: The 30s IFAN operation is for purging the heat from the in-coil after COMP has stopped.
Note 2: The IFAN will not be turned on until the in-coil temperature is high enough (as shown in the
graph below) to prevent the unit from supplying cool air.
IFAN Speed
Any
Low
Stop
30
35
40
ICT [
o
c]
ICT =
In-coil Temperature
Any =
Hi, Med or Low fan speed which is
selected by the user. In Auto Fan Speed
Mode, the fan speed is selected by the
unit automatically instead.
Low = The indoor fan is forced to operate at low
speed
21
Содержание GR451R
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