Input Current Control - Daikin ATXS35EV1B7 Service Manual

SiBE04-824
3.5

Input Current Control

Outline The microcomputer calculates the input current during the compressor is running, and set the
frequency upper limit from such input current.
In case of heat pump model, this control is the upper limit control function of the frequency
which takes priority of the lower limit of four way valve activating compensation.
Detail
Frequency control in each zone
Drooping zone
Keep zone
Reset zone
Stop zone
Limitation of current drooping and stop value according to the outdoor air temperature
1. In case the operation mode is cooling
2. In case the operation mode is heating (only for heat pump model)
Function and Control
I4
I3
I3 –Iα
The maximum limit of the compressor frequency in this control is defined as operation
frequency – 2Hz.
After this, the output frequency is pulled down by 2Hz every second until it reaches the
steady zone.
The present maximum frequency goes on.
Limit of the frequency is cancelled.
After 2.5 s in this zone, the compressor is stopped.
Cooling
I4 (A)
I3 (A) Normal mode
ECONO mode
I3-Iα (A)
Normal mode
ECONO mode
The current droops when outdoor air temperature becomes higher than a certain level
(model by model).
The current droops when outdoor air temperature becomes higher than a certain level
(model by model).
Compressor Stop
25 class 35 class 50 class
9.25 20.0
6.0 7.25 10.0
4.25 5.0 7.0
5.25 6.5 9.0
3.5 4.25 6.0
Control Specification
Stop Zone
Drooping Zone
Keep Zone
Reset Zone
(R4304)
Heating
25 class 50 class
35 class
9.25 20.0
7.5 8.25 15.0
5.25 5.75 10.5
6.75 7.5 14.0
4.5 5.0 9.5
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