Capacity Control - Toshiba RAS-B05E2KVG-E Service Manual

Item
3. Outdoor fan
motor control
In cooling operation
RAS-16E2AVG-E
Compressor speed
RAS-18E2AVG-E
Fan speed range
To ≥ 38°C
To ≥ 28°C
To ≥ 15°C
To
To ≥ 5.5°C
To ≥ 0°C
To ≥ 0°C
When To is abnormal
Outdoor fan speed (rpm)
Model name
f0 f1
RAS-16E2AVG-E 0 300
RAS-18E2AVG-E 0 300
The cooling or heating capacity depending on the load is
4. Capacity
control adjusted.
According to difference between the setup value of tempera-
ture and the room temperature, the capacity is adjusted by
the compressor revolution.
Remote controller
Set temp. (Ts)
Detection of electromotive force
Detection of motor speed and rotor position
Correction value of Hz signal ≤ Operating Hz
Operation flow and applicable data, etc.
Hz < 25.2 25.2 ≤ Hz < 66.0
66.0 ≤ Hz
Hz < 27.6 27.6 ≤ Hz < 66.0
MIN MAX MIN MAX MIN
f6 fB f8 fE fA
f5 fA f7 fD f9
f3 f7 f5 f9 f7
f2 f5 f4 f7 f6
f1 f3 f3 f5 f4
f1 f2 f2 f4 f3
OFF fB OFF fE f1
f2 f3 f4 f5
300 300 360 450
300 300 360 450
Ts –Ta
Correction of Hz signal
of compressor motor winding
Inverter output change
Commutation timing change
Change of compressor speed
RAS-16E2AVG-E
Compressor speed
RAS-18E2AVG-E
MAX Fan speed range
fE To ≥ 10°C
fE To ≥ 5°C
To
fB To ≥ -3°C
f9 To ≥ -10°C
f7 To < - 10°C
f5 When To is abnormal
fE
Fan speed range
f6 f7 f8 f9
500 550 600 650
500 550 600 650
Indoor unit
Room temp. (Ta)
- 42 -
Description
In heating operation
Hz < 31.8 31.8 ≤ Hz < 60.6
MIN MAX MIN MAX
f7 f8
f9 fB
fE fE
fE fE
fE fE
fE fF
fA fB fC fD
700 800 900 900
700 800 900 900
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.
According to the difference
4)
resulted from comparison of the
correction value of Hz signal with
the present operation Hz, the
inverter output and the
commutation timing are varied.
Change the compressor motor
5)
speed by outputting power to the
compressor.
* The contents of control
operation are same in cooling
operation and heating
operation
60.6 ≤ Hz
MIN MAX
f9
fE
fE
fE
fE
fF
fE fF
950 950
950 950