Toshiba RAS-10UKV-E Service Manual page 27

(3) Current release control
The input current of compressor and outdoor fan
motor (Precisely inverter main circuit control
section) which occupy most of air conditioner input
is detected by the outdoor current sensor, and
compressor motor speed is gradually lowered so
that current value does not exceed 7.1A if current
value exceeds 7.1A. When the current value
lowers to 6.6A, return the operation to the above
item (1).
7.1
6.6
Normal control
Fig. 8-2-3
(4) Outdoor temperature release control
The outdoor temperature release is controlled by
changing the current release points 7.1 and 6.6 in
the above item according to temperature detected
by the outdoor temperature sensor.
For example, if the outdoor temperature is 43°C,
the value of current release point becomes 5.0A.
NOTE
*1: The values marked with *1 are calculated and controlled by the difference in motor speed between 32 rps
and 22 rps.
Comp. motor
speed down
Comp. motor
speed keep
6.0
5.0
4.0
3.5
3.0
2.5
2.0
1.5
1.0
0.5
0
-0.5
-1.0
-2.0
1H 2H 3H
Fig. 8-2-4
– 26 –
(5) Limit for maximum compressor motor speed
by indoor fan speed
When the indoor heat exchanger sensor detected
17°C or lower, the maximum compressor motor
speed is limited by the indoor fan speed.
For example, the compressor motor speed is
limited as described in the table below.
Air flow rate To < 32°C
H 54
M + 48
MED. 41
M, L + , L–, L 35
L, L–, UL, SUL 28
(6) Louver control
The vertical air flow louvers are automatically set
to horizontal or cool memory position.
When temperature of indoor heat exchanger
becomes 5°C or lower by the prevent-freezing
control and the compressor is turned off, the
vertical air flow louvers close once and then return
to the position of previous time.
(7) ECO operation control
When the ECO button of the remote controller is
pushed, quiet and mild operation is performed by
restraining air flow and operating motor speed.
1) Indoor air flow is controlled between SUL and L.
2) Setting 32 rps as the maximum operating
compressor motor speed, the minimum capac-
ity operation range is widened every 1 hour and
4 hours have passed after ECO operation had
started.
Indoor Comp.
fan motor
speed
L 32rps
L-
22rps
UL
SUL
OFF
4H
FILE NO. SVM-02007
To 32°C
after 1H running
54
49
44
39
28
*1
*1
*1
*1
*1