Control Specification SiBE041101
41 Function and Control
3.5 Input Current Control
Outline The microcomputer calculates the input current during the compressor is running, and sets the
frequency upper limit from the input current.
In case of heat pump model, this control which is the upper limit control of the frequency takes
priority to the lower limit of control of four way valve operation compensation.
Detail
Frequency control in each zone
Stop zone
After 2.5 seconds in this zone, the compressor is stopped.
Drooping zone
The upper limit of the compressor frequency is defined as operation frequency – 2 Hz.
After this, the output frequency is pulled down 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.
Limitation of current drooping and stop value according to the outdoor temperature
The current droops when outdoor temperature becomes higher than a certain level
(depending on the model).
20 class 25 class 35 class
Cooling Heating Cooling Heating Cooling Heating
A
(A) 9.25 9.25 9.25
B
(A) Normal mode 6.0 7.5 6.25 7.5 8.25
ECONO mode 3.25 3.25 3.25
C
(A) Normal mode 5.25 6.75 5.5 6.75 7.5
ECONO mode 2.5 2.5 2.5
42 class 50 class
Cooling Heating Cooling Heating
A
(A) 14.25 20.0
B
(A) Normal mode 10.0 10.5 10.0 15.0
ECONO mode 4.5 7.0 10.5
C
(A) Normal mode 9.0 9.5 9.0 14.0
ECONO mode 3.5 6.0 9.5
Compressor Stop
Input current
Drooping Zone
Stop Zone
Keep Zone
Reset Zone
(R14246)
A
(A)
B
C
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