Input Current Control - Daikin FTKM-U 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.
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
Keep zone
 The present maximum frequency goes on.
Reset zone
 Limit of the frequency is canceled.
A (A)
B (A)
C (A)
Limitation of current dropping and stop value according to the outdoor temperature
40
(A)
A
B
C
Input current
zone.
12 class
10
5.7
3.7
 The current drops when outdoor temperature becomes higher than a certain level.
Compressor Stop
18 class 24 class
10 11.5
7.7 10
5.7 9
SiMX042215E
Stop zone
Dropping zone
Keep zone
Reset zone
(R23249)
Part 4 Functions and Control