Heating Operation; Capacity Control - Toshiba RAS-B10SKVP-E Service Manual

Item
3. Outdoor fan <Heating operation>
motor control
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.
TE
24˚C
21˚C
18˚C
15˚C
RAS-3M18SAV-E
Compressor revolution (rps)
Normal
operation
Econo
operation
To is abnormal
4. Capacity 1) Four indoor units from A to D determine the respective instruction revolutions from the difference
control 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:
No.of
Operation
operating
mode
unit
1 unit
COOL
2 units
3 units
∗
: In case that any multiple indoor units are combined.
Operation flow and applicable data, etc.
<Fan speed control>
Zone A: Decreased by 100 rpm every 20 seconds (to the MIN revolutions).
Zone A : When Zone A operation continues for 5 minutes, the compressor is
stopped and then restarted.
Zone B: Decreased by 100 rpm every 20 seconds
Zone B :
(to the MIN revolutions).
Zone C: Decreased by 50 rpm every 20 seconds
Zone C :
(to the MIN revolutions).
Zone D: Maintained at the current revolutions.
Zone D :
Zone E: Increased by 50 rpm every 20 seconds
Zone E :
(to the MAX revolutions).
~
Fan revolution Min.
To > 10°C 300
5.5 < To < 10 390
–5 < To < 5.5 500
To < –5 500
To > 10°C 300
5.5 < To < 10 390
–5 < To < 5.5 390
To < –5 390
— 300
Indoor unit A
Indoor unit B
Indoor unit C
Compressor
Combination
revolution
of indoor units
(rps)
10 16 to 43
13 16 to 69
16 16 to 78
¡ ∗
30 to 80
¡ ∗
35 to 86
~
28 52
Max. Min. Max. Min.
390 600 750 700
390 750 750 800
500 800 800 800
500 800 800 800
390 350 500 350
390 500 500 500
390 500 500 500
390 500 500 500
390 500 700 700
Outdoor unit
Inverter
Compressor
No.of
Operation
operating
mode
unit
1 unit
HEAT
2 units
3 units
– 40 –
Description
~
52
Max.
800
800
800
800
500
500
500
500
To: Outdoor
800
sensor temp. (°C)
Compressor
Combination
revolution
of indoor units
10 16 to 68
13 16 to 74
16 16 to 89
¡ ∗
30 to 110
¡ ∗
35 to 110
(rps)