Toshiba RAS-16PKVP-ND - Capacity Control

High Wall, Heat Pump Type
Service Manual
38
Toshiba
Outdoor fan speed (rpm)
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
operation of air conditioner continues with the
fan motor stopped.
3) Whether the fan is locked or not is detected,
and the operation of air conditioner stops and
an alarm is displayed if the fan is locked.
4) According to each operation mode, by the
conditions of outdoor temperature (TO) and
compressor revolution, the speed of the
outdoor fan shown in the table is selected.
8-5. Capacity Control
The cooling or heating capacity depending on the load
is adjusted.
According to difference between the setup value of
temperature and the room temperature, the capacity is
adjusted by the compressor revolution.
1) The difference between set temperature on
remote controller (Ts) and room temperature
(TA) is calculated.
2) According to the temperature difference, the
correction value of Hz signal which determines
the compressor speed is set up.
3) The rotating position and speed of the motor
are detected by the electromotive force
occurred on the motor winding with operation
of the compressor.
4) According to the difference resulted from
comparison of the correction value of Hz signal
with the present operation Hz, the inverter
output and the commutation timing are varied.
5) Change the compressor motor speed by
outputting power to the compressor.
*The contents of control operation are same
in cooling operation and heating operation
f1
f0
f2
f3
f4
f5
f6
f7
f8
16PAVP-E
16PAVP-ND
230
300
350
400
450
500
550
600
18PAVP-E
18PAVP-ND
13PAVP-E
13PAVP-ND
10PAVP-E
10PAVP-ND
07PAVP-E
07PAVP-ND
f9
fA
fB
fC
fD
fE
fF
650
700
800
800
850
900
900
0
230
300
350
400
450
500
550
600
650
700
800
800
900
950
950
0
230
300
350
400
450
500
550
600
650
700
800
800
850
900
900
0
230
300
350
400
450
500
550
600
650
700
750
750
800
850
850
0
230
300
350
400
450
500
550
600
650
700
750
750
750
800
800
0
Tap
Set temperature (Ts)
Room temperature (TA)
Correction of Hz signal
Detection of electromotive force
of compressor motor winding
Detection of motor speed and rotor position
Inverter output change
Commutation timing change
Change of compressor speed
Remote controller Indoor unit
Ts –TA
Correction value of Hz signal Operating Hz
+00A08-010_01EN_SVM_HighWallHeatPump.book Page 38 Wednesday, March 4, 2009 11:22 AM