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

Item
1) The indoor units from A to C determine the respective instruction revolutions from the difference between
4. Capacity
control 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.
Operation No.of
mode operating unit
1 unit
COOL
2 unit
3 unit
∗ : In case that any multiple indoor units are combined.
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 specified value.
Outdoor unit inverter main
circuit control current
Operating current ≤
Setup value
Low
Capacity control continues.
Outdoor temp.
40˚C
16˚C
11˚C 15.5˚C
10.5˚C
Operation flow and applicable data, etc.
Indoor unit A
Indoor unit B
Indoor unit C
Combination of Compressor
indoor units revolution (rps)
M07 15 to 27.5
M10 15 to 27.5
M13 15 to 42.5
M16 15 to 53.5
M18 15 to 55.1
M22 15 to 62.2
M24 15 to 70.0
ο
∗
15 to 65.8
ο
∗
30.5 to 68.8
Setup of current release point
High
Reduce compressor speed
Cooling current
release value
9.6 A
39˚C
14.2 A
Outdoor unit
Inverter Compressor
Operation No.of
mode operating unit
1 unit
HEAT
2 unit
3 unit
Outdoor temp. To
Current decrease
Heating current
release value
14.4 A
14.5 A
14.6 A
– 55 –
Description
Combination of Compressor
indoor units revolution (rps)
M07 15 to 52.1
M10 15 to 52.1
M13 15 to 63.4
M16 15 to 67.0
M18 15 to 85.0
M22 15 to 87.4
M24 15 to 88.0
ο
∗
15 to 90.4
ο
∗
17.4 to 90.4
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.