Toshiba RAS-3M18SACV-E, Service Manual

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Indoor unit A
Inverter
Outdoor unit
Compressor
Indoor unit B
Indoor unit C
<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 :
Item
3. Outdoor fan
motor control
Operation flow and applicable data, etc.
<Heating operation>
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.
RAS-3M18SAV-E
To: Outdoor
sensor temp. (°C)
Description
4. Capacity
control
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:
∗
: In case that any multiple indoor units are combined.
Compressor revolution (rps)
Fan revolution
To > 10°C
Normal
5.5 < To < 10
operation
–5 < To < 5.5
To < –5
To > 10°C
Econo
5.5 < To < 10
operation
–5 < To < 5.5
To < –5
To is abnormal —
~
28
~
52 52
~
Min. Max. Min. Max. Min. Max.
300 390 600 750 700 800
390 390 750 750 800 800
500 500 800 800 800 800
500 500 800 800 800 800
300 390 350 500 350 500
390 390 500 500 500 500
390 390 500 500 500 500
390 390 500 500 500 500
300 390 500 700 700 800
Operation
mode
COOL
No.of
operating
unit
1 unit
2 units
3 units
Combination
of indoor units
10
13
16
¡
∗
¡
∗
Compressor
revolution
(rps)
16 to 43
16 to 69
16 to 78
30 to 80
35 to 86
Operation
mode
HEAT
No.of
operating
unit
1 unit
2 units
3 units
Combination
of indoor units
10
13
16
¡
∗
¡
∗
Compressor
revolution
(rps)
16 to 68
16 to 74
16 to 89
30 to 110
35 to 110