– 57 –
Indoor unit A
Inverter
Outdoor unit
Compressor
Indoor unit B
Indoor unit C
Indoor unit D
Indoor unit E
Outdoor temp. To
Setup of current release point
Capacity control continues.
Outdoor temp.
40˚C
13.1 A
15.0 A
12.6 A
12.6 A
18.0 A
16˚C
39˚C
11˚C
15.5˚C
10.5˚C
Cooling current
release value
Heating current
release value
Current decrease
Outdoor unit inverter main
circuit control current
High
Low
Reduce compressor speed
Operating current
≤
Setup value
Item
4. Capacity
control
5. Current release
control
Operation flow and applicable data, etc.
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.
Description
1) Four indoor units from A to E determine the respective instruction revolutions from the difference
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.
: In case that any multiple indoor units are combined.
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.
Operation
mode
COOL
No.of
operating
unit
1 unit
2 units
3 units
4 units
5 units
Combination
of indoor units
M07
M10
M13
M16
M18
¡
¡
¡
¡
Compressor
revolution
(rps)
12
.0
to 22.1
12
.0
to 22.1
12
.0
to 34.1
12
.0
to 43.1
12
.0
to 44.9
12
.0
to 53.3
24.5 to 56.2
24.5 to 56.2
24.5 to 80.2
Operation
mode
HEAT
No.of
operating
unit
1 unit
2 units
3 units
4 units
5 units
Combination
of indoor units
M07
M10
M13
M16
M18
¡
¡
¡
¡
Compressor
revolution
(rps)
12
.0
to 42.5
12
.0
to 42.5
12
.0
to 51.5
12
.0
to 54.4
12
.0
to 69.4
12
.0
to 73.6
14.4 to 73.6
18.0 to 73.6
18.0 to 100.5
