Toshiba RAS-18E2AVG-E, Service Manual

Page: 42 / 141

Item
3. Outdoor fan
motor control
Operation flow and applicable data, etc. Description
Outdoor fan speed (rpm)
f0 f1 f2 f3 f4 f5 f6 f7 f8 f9 fA fB fC fD fE fF
RAS-1
6 E2AVG- E
0 300 300 300 360 450 500 550 600 650 700 800 900 900 950 950
Fan speed range Model name
RAS-18
E2AVG- E
0 300 300 300 360 450 500 550 600 650 700 800 900 900 950 950
In cooling operation In heating operation
MIN MAX MIN MAX MIN MAX MIN MAX MIN MAX MIN MAX
f6 fB f8 fE fA fE f7 f8 f9
f5 fA f7 fD f9 fE f9 fB fE
f3 f7 f5 f9 f7 fB fE fE fE
f2 f5 f4 f7 f6 f9 fE fE fE
f1 f3 f3 f5 f4 f7 fE fE fE
f1 f2 f2 f4 f3 f5 fE fF fF
OFF fB OFF fE f1 fE
To ≥ 5°C
Compressor speed
RAS-16E2
A
VG-E
Hz < 31.8
To ≥ 0°C To < - 10°C
To ≥ 0°C When To is abnormal
When To is abnormal
To ≥ 28°C
60.6 ≤
Hz
Hz < 27.6
66.0 ≤
Hz
RAS-16E2
A
VG-E
RAS-18E2AVG-E RAS-18E2AVG-E
27.6 ≤ Hz < 66.0
25.2 ≤ Hz < 66.0
To ≥ 15°C To ≥ -3°C
To ≥ 5.5°C To ≥ -10°C
Fan speed range Fan speed range
To
To ≥ 38°C
To
To ≥ 10°C
Hz < 25.2
31.8 ≤ Hz < 60.6 Compressor speed
4. Capacity
control
The cooling or heating capacity depending on the load is
adjusted.
According to difference between the setup value of tempera-
ture 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)
4)
5)
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
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
speed by outputting power to the
compressor.
* The contents of control
operation are same in cooling
operation and heating
operation
Set temp. (Ts) Room temp. (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
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