Input Current Control - Daikin FTX25JVEA9 Service Manual

System control
3.16

Input Current Control

3.16.1 Input Current Control I
Outline The input current is detected by CT during compressor operation, and the input current value is
used to control the upper limit of the frequency.
As shown in the diagram below, the constraint frequency is varied differently in the stop,
drooping, no-change and reset zones.
When the constraint frequency remains in the stop zone for the specified period time, the
compressor is stopped.
The lower-limit current (input current droop value) in the drooping zone; I3 varies according to
the JIS mode or outside temperature (to stay within the system use area).
The input current control I is a higher-level constraint function that takes precedence over the
lower-limit control for 4-way valve operation guarantee.
Note Only 4-way valve operation guarantee has precedence, but not other lower-limit control.
132
Si18-201
Main Functions