SiUS122226E
4.6
Input Current Control
Outline
The microcomputer calculates the input current while the compressor is running, and sets the
frequency upper limit based on the input current.
In case of heat pump models, this control is the upper limit control of the frequency and takes
priority over the lower limit control of four way valve operation compensation.
Details
Frequency control in each zone
Stop zone
After the input current remains in the stop zone for 2.5 seconds, the compressor is stopped.
Dropping zone
The upper limit of the compressor frequency is defined as operation frequency – 2 Hz.
After this, the output frequency is lowered by 2 Hz every second until it reaches the keep zone.
Keep zone
The present maximum frequency goes on.
Reset zone
Limit of the frequency is canceled.
A (A)
B (A)
C (A)
A (A)
B (A)
C (A)
Limitation of current dropping and stop value according to the outdoor temperature
The current drops when outdoor temperature becomes higher than a certain level (depending on
the model).
Part 4 Functions and Control
(A)
A
B
C
Input current
2MXS
Cooling
Heating
Cooling
13.0
15.0
15.5
11.5
14.0
14.0
10.5
13.0
13.0
2MXL(H)
Cooling
Heating
Cooling
15.5
17.5
15.5
14.0
15.5
14.0
13.0
14.5
13.0
Compressor Stop
3MXS
4MXS
Heating
Cooling
17.5
18.0
15.5
17.0
14.5
16.0
3MXL(H)
4MXL(H)
Heating
Cooling
18.5
27.5
17.5
25.5
16.5
24.5
Control Specification
Stop zone
Dropping zone
Keep zone
Reset zone
(R23249)
5MXS
Heating
Cooling
Heating
18.5
27.5
29.0
17.5
25.5
27.0
16.5
24.5
26.0
Heating
29.0
27.0
26.0
103