– 50 –
3. Outdoor fan revolution number control
Control of fan revolution number and the fan taps in this unit are shown below.
Fan Taps Revolution number Allocation [rpm]
3-1. Cooling fan control
1) Cooling operations of the outdoor fan are controlled by a TL sensor, TO sensor and the compressor
revolution number. Control is performed per 1 tap of DC fan control.
The outdoor fan is controlled by every 1 tap of DC fan control (14 taps).
During startup, operation is fixed for 60 seconds to a maximum fan tap corresponding to the zones
shown in the table below. Thereafter fan tap is controlled by a temperature outputted from the TL sensor.
SM224
Upper Fan
Lower Fan
SM280
Upper Fan
Lower Fan
W1
W2
W3
W4
W5
W6
W7
W8
W9
WA
WB
WC
WD
WE
WF
250
280
280
310
340
400
460
520
580
640
710
760
830
860
920
0
0
250
270
300
350
410
470
530
590
640
710
770
810
850
250
280
280
340
400
460
520
580
640
710
760
830
860
920
940
0
0
250
300
350
410
470
530
590
640
710
770
810
850
920
3-2 Heating fan control
1) Heating operations of the outdoor fan are controlled by a TE sensor, TO sensor and the compressor
revolution number.
(Control from a minimum W1 to a maximum is performed according to the table below).
2) Operation is fixed for 3 minutes after start up by a maximum fan tap corresponding to the zones in the
table below. Thereafter fan control is performed using the temperature from the TE sensor.
3) When TE
≥
24°C continues for 5 minutes, the compressor is stopped. The compressor is placed in
the same state as a normal thermostat OFF without an error display.
The compressor is restarted after approximately 2 minutes 30 seconds and such interrupted operation
does not constitute an error. When the operation in 3) above is frequently performed, the filter of the
intake section of the indoor unit may require cleaning.
Therefore restart operation after cleaning the filter.
24
TE (˚C)
21
18
15
–2 taps / 20 sec.
Stop timer count
(Until W1)
+1 tap / 20 sec.
Revolution number HOLD
–1 tap / 20 sec.
(Until W1)
–2 taps / 20 sec.
(Until W1)
Maximum
10°C
≤
TO
5
≤
TO < 10°C
–3
≤
TO < 5°C
–10
≤
TO < –3°C
TO < –10°C
TO error
Less than
45 rps
WA
WC
WF
WF
WF
WF
45 rps or more
and less than 60 rps
WB
WD
WF
WF
WF
WF
60 rps
or more
WC
WF
WF
WF
WF
WF
38°C
≤
TO
29°C
≤
TO < 38°C
15
≤
TO < 29°C
5
≤
TO < 15°C
0
≤
TO < 5°C
–5
≤
TO < 0°C
TO < –5°C
TO error
Less than 45 rps
Min.
Max.
W6
WE
W5
WD
W3
WA
W2
W8
W1
W6
W1
W5
W1
W4
W1
WE
45 rps or more
and less than 60 rps
Min.
Max.
W8
WF
W7
WF
W5
WC
W4
WA
W3
W8
W2
W7
W3
W5
W3
WF
60 rps or more
Min.
Max.
WA
WF
W9
WF
W7
WE
W6
WC
W4
WA
W3
W8
W3
W6
W3
WF
37
58
55
34
TL (˚C)
+1 tap / 20 sec.
Until Maximum rps
in each zone
–1 tap / 20 sec.
Until Minimum rps
in each zone
Revolution number HOLD
( )
( )
WF tap
