Input Current Control - Daikin FTXM-K Series Service Manual

Control Specification
3.5

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 frequency and takes
priority over the lower limit control of four way valve operation compensation.
Detail
Frequency control in each zone
Stop zone
Dropping zone
Keep zone
Reset zone
A (A)
B (A)
C (A)
Limitation of current dropping and stop value according to the outdoor temperature
43
(A)
A
B
C
Input current
After 2.5 seconds in this zone, the compressor is stopped.
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.
The present maximum frequency goes on.
Limit of the frequency is canceled.
20/25 class
Cooling Heating
9.25
6.25 7.5
5.5 6.75
The current drops when outdoor temperature becomes higher than a certain level
(depending on the model).
Compressor Stop
35 class
Cooling Heating Cooling
9.25
8.25
7.5
SiBE041434E
Stop Zone
Dropping Zone
Keep Zone
Reset Zone
(R14643)
42/50 class
Heating
10.0
8.5
7.5
Function and Control