AirStage AO54FJ, Service Manual

Page: 49 / 169

04-04
4-3 FAN CONTROL
4-3-1 Cooling Operation
FAN SPEED
NORMAL
FAN SPEED
NIGHT MODE
Step 1
Step 2
Step 3
Step 4
Step 5
Step 6
Hi Lo
Lo Lo
Intermittent 1 Intermittent 1
Intermittent 2 Intermittent 2
Intermittent 3 Intermittent 3
OFF OFF
CONDENSING TEMPERATURE
TH
HM
33 C
Down to Step 2
<
=
TH
HM
44 C
Up to Step 1
=>
TH
HM
18 C
Down to Step 3
<
=
TH
HM
42 C
Up to Step 2
=>
TH
HM
16 C
Down to Step 4
<
=
TH
HM
16 C
Down to Step 5
<
=
TH
HM
38 C
Up to Step 3
=>
TH
HM
36 C
Up to Step 4
=>
FAN TABLE
Step 3, Intermittent 1
6.0 sec 8.7 sec
ON
OFF
Step 4, Intermittent 2
ON
OFF
Step 5, Intermittent 3
ON
OFF
STEP 1 STEP 2 STEP 3
STEP 4 STEP 5
TH
HM
33
<
=
TH
HM
44
=
>
TH
HM
18
<
=
TH
HM
42
=
>
TH
HM
16
<
=
TH
HM
16
<
=
TH
HM
38
=
>
TH
HM
36
=
>
Step change
The fan speed selection during the cooling operation is performed by the condensing
temperature (Heat exchanger mid temperature value TH
HM
).
When starting operation, it starts with Step 1 as follows.
4-3-2 Heating Operation
Heating operation is performed at Hi all the time.
4-3-3 Protective Operation
Excessitive heat protection of the heat sink functions to change the fan speed to Hi.
3.5 sec
7.4 sec
4.7 sec 15.4 sec
FAN OPERATION