Toshiba RAS-3M18SACV-E, Service Manual

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Air conditioner ON (Remote controller)
YES
YES
NO
NO
Indoor unit controller
Fan motor ON
3) Fan lock
OFF status of fan motor continues.
4) Motor operates as shown in the table below.
1) Outdoor unit operation command
(Outdoor fan control)
Air conditioner OFF
Alarm display
2) Fan speed
³
300
when the motor stopped.
<Fan speed control>
Zone A: Increased by 50 rpm every 20 seconds (to the MAX revolutions).
Zone C: Decreased by 50 rpm every 20 seconds (to the MIN revolutions).
Zone B: Maintained at the current revolutions.
TE
32˚C
29˚C
Zone A :
Zone B :
Zone C :
TD
85˚C
80˚C
75˚C
70˚C
Zone M :
Zone L :
Zone N :
Item
3. Outdoor fan
motor control
Operation flow and applicable data, etc.
The blowing air volume at the outdoor unit side is controlled.
Receiving the operation command from the controller of indoor
unit, the controller of outdoor unit controls fan speed.
* A DC motor is used for the outdoor fan and the fan is con-
trolled with 10 stages.
<Cooling operation, dry 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. However, the exception in case of *1.
1) In the following cases, the outdoor fan is driven at MAX. speed.
• 1 minute from start of compressor.
2) The fan speed changes by the TE (outdoor heat exchanger sensor temperature) or
TD (compressor discharge sensor temperature) as shown in the table below.
Zone M : 1000rpm.(Fixed) *1
Zone L : MAX. taps.
Zone N : Not controlled by TD temperature. (Usual control)
RAS-3M18SAV-E, RAS-3M18SACV-E
To: Outdoor sensor temp. (°C)
Description
1) The operation command sent
from the remote controller is
processed by the indoor unit
controller and transferred to the
controller of the outdoor unit.
2) When strong wind blows at
outdoor side, the outdoor fan is
not activated.
3) The operation of air conditioner
stops and an alarm is displayed if
the fan is locked.
4) The outdoor fan is controlled by
• Operation mode
• Outdoor temperature (To)
• Compressor revolution shown
in the table below:
Compressor revolution (rps)
Fan revolution
To > 38°C
28 < To < 38
Normal
18 < To < 28
operation
10 < To < 18
5.5 < To < 10
0 < To < 5.5
Econo
To > 38°C
operation
To < 38°C
To is abnormal —
~
17
~
39
~
92 92
~
Min. Max. Min. Max. Min. Max. Min. Max.
500 500 750 750 850 850 850 850
500 500 700 700 800 800 800 800
300 390 390 600 500 700 750 750
300 390 300 500 300 500 600 600
300 350 300 390 300 390 350 500
300 350 300 350 300 350 350 500
500 500 700 700 750 750 800 800
500 500 600 600 700 700 750 750
300 500 500 750 500 800 850 850