Input Current Control - Daikin FTXN25KEV1B Service Manual

SiBE041102_A
3.5

Input Current Control

Outline The microcomputer calculates the input current while 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 over the lower limit of control of four way valve operation compensation.
Detail
Frequency control in each zone
Stop zone
Dropping zone
Keep zone
Reset zone
A
B
C
Limitation of current dropping and stop value according to the outdoor temperature
Function and Control
(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 pulled down by 2 Hz every second until it reaches the keep
zone.
The present maximum frequency goes on.
Limit of the frequency is canceled.
(A)
(A) Normal mode
ECONO mode
(A) Normal mode
ECONO mode
The current drops when outdoor temperature becomes higher than a certain level
(depending on the model).
Compressor stop
25 class
Cooling Heating Cooling
8.5 10.0 9.25
6.5 8.0 7.25
2.75
5.75 7.25 6.5
2.0
Control Specification
Stop zone
Dropping zone
Keep zone
Reset zone
(R14840)
35 class
Heating
10.5
8.5
2.75
7.75
2.0
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