Toshiba RAS-4M23SACV-E, Service Manual

Page: 47 / 121

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Item
3. Outdoor fan
motor control
Operation flow and applicable data, etc.
<Heating operation>
Description
Indoor unit A
Inverter
Outdoor unit
Compressor
Indoor unit B
Indoor unit C
Indoor unit D
Compressor revolution (rps)
Fan revolution
To > 10°C
Normal
5.5 < To < 10
operation
–5 < To < 5.5
To < –5
To > 10°C
SLEEP
5.5 < To < 10
operation
–5 < To < 5.5
To < –5
To is abnormal —
~
20
~
34 34
~
Min. Max. Min. Max. Min. Max.
300 390 510 600 550 670
390 390 600 600 670 670
450 450 670 670 670 670
450 450 670 670 670 670
300 390 390 510 390 510
390 390 510 510 510 510
390 390 510 510 510 510
390 390 510 510 510 510
300 390 390 510 550 670
1) Four indoor units from A to D determine the respective instruction revolutions from the difference
between the remote controller setting temperature (Ts) and the indoor temperature (Ta), and
transmit this to the outdoor unit.
2) The outdoor unit receives the instructions from the indoor units, and the inverter operates the
compressor at the calculated revolutions.
3) The compressor operation range in each operating mode is shown in the table below:
4. Capacity
control
<Fan speed control>
Zone A: Decreased by 100 rpm every 20 seconds (to the MIN revolutions).
When Zone A operation continues for 5 minutes, the compressor is
stopped and then restarted.
Zone C: Decreased by 50 rpm every 20 seconds
(to the MIN revolutions).
Zone D: Maintained at the current revolutions.
Zone E: Increased by 50 rpm every 20 seconds
(to the MAX revolutions).
Zone B: Decreased by 100 rpm every 20 seconds
(to the MIN revolutions).
TE
24˚C
21˚C
18˚C
15˚C
Zone A :
Zone B :
Zone C :
Zone D :
Zone E :
∗
: In case that any multiple indoor units are combined.
To: Outdoor
sensor temp. (°C)
RAS-4M23SAV-E
Basically, the fan speed is decided by the compressor speed and the outdoor temperature.
The fan speed is controlled between MIN. and MAX. as shown in the table below.
1) In the following cases, the outdoor fan is driven at MAX. speed.
• 3 minutes from start of compressor.
• 1 minute after defrosting operation ends.
2) The fan speed changes by the TE (outdoor heat exchanger sensor temperature) as shown in the
table below.
Operation
mode
COOL
No.of
operating
unit
1 unit
2 units
3 units
4 units
Combination
of indoor units
M10
M13
M16
¡
∗
¡
∗
¡
∗
Compressor
revolution
(rps)
16 to 38
16 to 60
16 to 72
24 to 68
32 to 74
37 to 80
Operation
mode
HEAT
No.of
operating
unit
1 unit
2 units
3 units
4 units
Combination
of indoor units
M10
M13
M16
¡
∗
¡
∗
¡
∗
Compressor
revolution
(rps)
16 to 72
16 to 77
16 to 90
24 to 100
32 to 100
37 to 100