Input Current Control - Daikin FTX20K(2)V1B Service Manual

SiBE041525F
3.5

Input Current Control

The microcomputer calculates the input current while the compressor is running, and sets the
Outline
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
 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
 The current drops when outdoor temperature becomes higher than a certain level
Functions and Control
(A)
A
B
C
Input current
zone.
20/25 class
Cooling Heating
14.0
6.0 6.75
5.25 6.0
(depending on the model).
Compressor Stop
35 class
Cooling Heating Cooling
14.0
6.5 7.75 10
5.75 7.0 9
Control Specification
Stop Zone
Dropping Zone
Keep Zone
Reset Zone
(R14643)
50 class 60/71 class
Heating Cooling
18 18
10.75 12
9.75 11
Heating
11.5
10.5
32