Capacity Control; Current Release Control - Toshiba RAS-M10PKVP-E Service Manual

Item
4. Capacity 1) Two indoor units from A and B determine the respective instruction revolutions from the difference
control between the remote controller setting temperature (Ts) and the indoor temperature (Ta), and
transmit this to the outdoor unit.
2) The outdoor unit receives the instructions from the indoor units, and the inverter operates the
compressor at the calculated revolutions.
3) The compressor operation range in each operating mode is shown in the left table.
No.of
Operation
operating
mode
unit
1 unit
Cooling
2 units
5. Current This function prevents troubles on the electronic parts of the
release compressor driving inverter.
control This function also controls drive circuit of the compressor speed
so that electric power of the compressor drive circuit does not
exceed the specifi ed value.
Outdoor unit inverter main
circuit control current
Operating current ≤
Setup value
Low
Capacity control continues.
Outdoor temp.
40˚C
16˚C
11˚C
Operation fl ow and applicable data, etc.
Indoor unit A
Indoor unit B
Compressor
Combination
revolution
of indoor units
(rps)
07 – 13 to 45
10 – 13 to 45
13 – 13 to 71
16 – 13 to 79
07 07 15 to 83
10 07 15 to 83
10 10 15 to 83
13 07 15 to 83
13 10 15 to 83
16 07 15 to 83
16 10 15 to 83
13 13 15 to 83
16 13 15 to 83
Setup of current release point
High
Reduce compressor speed
Cooling current
release value
7.5 A
39˚C
15.5˚C
8.7 A
10.5˚C
Outdoor unit
Inverter
No.of
Operation
operating
mode
unit
1 unit
Heating
2 units
Outdoor temp. To
Current decrease
Heating current
release value
8.3 A
9.4 A
10.5 A
– 35 –
Description
Compressor
Compressor
Combination
revolution
of indoor units
07 – 13 to 76
10 – 13 to 76
13 – 13 to 99
16 – 13 to 102
07 07 15 to 110
10 07 15 to 120
10 10 15 to 120
13 07 15 to 120
13 10 15 to 120
16 07 15 to 120
16 10 15 to 120
13 13 15 to 120
16 13 15 to 120
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
specifi ed value of the current is
selected.
3) Whether the current value
exceeds the specifi ed value or
not is judged.
4) If the current value exceeds the
specifi ed 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
specifi ed value.
(rps)