Toshiba RAV-SM304SDT-TR Service Manual page 64

3. Outdoor fan control
W1
SP56 200
SP80 200
3-1) Cooling fan control
<SP56>
The outdoor fan is controlled by TE sensor, TO
sensor and the operation frequency. It is controlled
by every 1 tap of DC fan control (15 taps).
Only for 60 seconds after start-up of operation, it is
fixed by the maximum fan tap corresponded to the
zone in the following table, and then the fan is
controlled by temperature of TE sensor.
When temperature of TD sensor became high
sufficiently, it is controlled so that the fan revolution
frequency will become higher ignoring TE sensor
temperature.
TE [˚C]
+1 tap / 20 sec
Up to the maximum
revolution frequency of each zone
∗ Operation with W1 in case of fan-OFF
32
Revolution frequency hold
29
–1 tap / 20 sec
Down to the minimum
revolution frequency of each zone
TD [˚C]
85
80
75
65
20 Hz
or lower
Temp. range
Min. Max. Min. Max. Min. Max.
38°C ≤ TO W6
28°C ≤ TO < 38°C W5
15°C ≤ TO < 28°C W3
5.5°C ≤ TO < 15°C W2
0°C ≤ TO < 5.5°C W1
–5°C ≤ TO < 0°C W1
TO < –5°C OFF OFF OFF OFF
TO error W1
Revolution frequency allocation of fan taps [rpm]
W2 W3 W4 W5
250 300 400 480
230 260 300 340
Operation
with WF
Operation with
the maximum tap
of each zone
Normal fan control
by TE sensor
20Hz 45Hz
to 45Hz or higher
WB W7 WE W9
WA W6 WD W8
W7 W4 W9 W6
W5 W3 W7 W5
W3 W2 W5 W3
W2 W1 W3 W2
W1
WB W1 WE W1
W6 W7 W8 W9
500 520 560 640
380 420 460 520
<SP80>
The outdoor fan is controlled by TL sensor, TO
sensor and the operation frequency.
The outdoor fan is controlled by every 1 tap of DC
fan control (15 taps).
Only for 60 seconds after the operation has
started, the maximum fan tap corresponding to the
zone in the following table is fixed and then the fan
is controlled by temperature of TL sensor.
TL [˚C]
58
55
revolution frequency of each zone
38
35
revolution frequency of each zone
Temp. range
WF 38°C ≤ TO
WE
29°C ≤ TO < 38°C
WB
15°C ≤ TO < 29°C
W9 5°C ≤ TO < 15°C
W7 0°C ≤ TO < 5°C
W4 –4°C ≤ TO < 0°C
W3
TO < –4°C
WF
TO error
– 64 –
WA WB WC WD
670 700 750 800
570 600 630 670
WF tap
+1 tap / 20 sec
Up to the maximum
Revolution frequency hold
–1 tap / 20 sec
Down to the minimum
20 Hz 20Hz
or lower to 45Hz
Min. Max. Min. Max. Min. Max.
W6 WC W8 WE
W5 WB W7 WD
W4 W8 W6 WA
W3 W6 W5 W8
W2 W4 W4 W6
W2 W3 W3 W5
OFF OFF OFF W2
OFF WC OFF WE
WE WF
880 980
710 740
45Hz
or higher
WA WE
W9 WD
W8 WC
W7 WA
W5 W8
W4 W6
OFF W3
OFF WE