High Wall, Heat Pump Type
Service Manual
39
Toshiba
8-6. Current Release
Control
This function prevents troubles on the electronic parts
of the compressor driving inverter.
This function also controls drive circuit of the
compressor speed so that electric power of the
compressor drive circuit does not exceed the specified
value.
1) The input current of the outdoor unit is detected
in the inverter section of the outdoor unit.
2) According to the detected outdoor
temperature, the specified value of the current
is selected.
3) Whether the current value exceeds the
specified value or not is judged.
4) If the current value exceeds the specified
value, this function reduces the compressor
speed and controls speed up to the closest one
commanded from the indoor unit within the
range which does not exceed the specified
value.
8-7. Release Protective
control by
Temperature of Indoor
Heat Exchanger
8-7-1. In Cooling/Dry Operation
Prevent-freezing control for indoor heat
exchanger
In cooling/dry operation, the sensor of indoor heat
exchanger detects evaporation temperature and
controls the compressor speed so that temperature of
the heat exchanger does not exceed the specified
value.
1) When temperature of the indoor heat
exchanger drops below 5°C, the compressor
speed is reduced. (P zone)
2) When temperature of the indoor heat
exchanger rises in the range from 6°C to under
7°C, the compressor speed is kept. (Q zone)
3) When temperature of the indoor heat
exchanger rises to 7°C or higher, the capacity
control operation returns to the usual control in
cooling operation.
(R zone)
Outdoor temp.TO
Setup of current release point
Capacity control continues.
Current decrease
Outdoor unit inverter main
circuit control current
NO
YES
Reduce compressor speed
Operating current Setup value
Outdoor temp.
50°C TO
Cooling current
release value
5.40A
6.00A
6.53A
6.90A
Heating current
release value
7.72A
8.25A
8.77A
45°C TO<50°C
40°C TO<45°C
16°C TO<40°C
11°C TO<16°C
–5°C TO<11°C
TO<–5°C
07PAVP-E
07PAVP-ND
10PAVP-E
10PAVP-ND
07PAVP-E
07PAVP-ND
13PAVP-E
13PAVP-ND
10PAVP-E
10PAVP-ND
16PAVP-E
16PAVP-ND
13PAVP-E
13PAVP-ND
16PAVP-E
16PAVP-ND
18PAVP-E
18PAVP-ND
18PAVP-E
18PAVP-ND
7.72A
8.25A
8.77A
6.00A
7.20A
8.77A
6.90A
7° C
6°C
5°C
R
Q
P
Usual cooling capacity control
Reduction of compressor speed
Indoor heat e
xchanger temper
ature
When the value is
in Q zone, the
compressor speed
is kept.
+00A08-010_01EN_SVM_HighWallHeatPump.book Page 39 Wednesday, March 4, 2009 11:22 AM
