Service Manual
17
Operation Details
5. Heating Mode Operation
The unit will operate according to the setting by the remote controller and the operation diagram is shown as
following.
Intake Air Temp.
Setting Temp.
(Compressor ON)
Setting Temp. -1
°
C
Indoor Fan Speed
Compressor
Electric Heater(Option)
ON
ON
OFF
ON
OFF
OFF
OFF
ON
OFF
OFF
Hot
Start
minimum
10sec.
minimum
10sec.
minimum
10sec.
minimum
10sec.
OFF
A
A
OFF
LOW
LOW
Setting Temp. +1
°
C
(Compressor OFF)
Selecting
fan speed
Selecting
fan speed
• A point: The indoor pipe temperature to be less then 35°C & Discharge air Temperature to be less than 29°C.
The indoor fan operates for minimum 10sec. even if falls lower than 34°C.
Low(
V
)
Stop(
VI
)
39˚C
Discharge Air Temp.
Indoor Pipe Temp.
34˚C
28˚C
26˚C
Selecting Fan Speed(
IV
)
Low(
II
)
Stop(
I
)
(Hot-Start Operating)
Heating Start
(Hot-Start Release Point)
Selecting Fan Speed(
III
)
During heating operation, the operating procedure of the indoor fan is as the following.
Step
Indoor fan speed
Pipe temp.
Air discharge temp.
Off
28 C(Hot start operating)
Low
28 C
< 39°C
Selecting speed
28 C
≥
39°C
Selecting speed
28 C
> 34°C
Low
26 C
≤
34°C
Off
26 C
