Daikin FTXD60JV1B [43/164] Input current control

Daikin FTXD50JV1B [43/164] Input current control
SiBE04-101 General Functions
Main Function 35
1.14 Input Current Control
Outline The frequency control will be carried out so that the input current will not exceed the rated value in the zone
which is divided by the input current detected with CT as the figure below shows.
I4, I3, I3-Iα are included in the stop zone, step down, steady zone, respectively.
Details of the
Control
1. Frequency control in each zone
Step down zone (judged as the step down zone with the input current I IN I3)
The upper limit FNYD of the frequency in this control is defined as ‘operation frequency - 2 Hz’.
After this, the output frequency is dealt with step down by 2 Hz every one second till it will reach the
steady zone.
Steady zone (judged as the step down zone with I3 - Iα I IN < I3 by step down operation)
Keeping the present frequency’s upper limit FNYD.
Return zone (judged as the return zone with I IN < I3 - Iα) (Iα = 1A)
Limit of frequency is cancelled.
Stop zone (judged as the stop zone with I IN I4)
Compressor is stopped and countermeasure for the malfunction is carried out.
2. Current step down : deciding I3
In cooling mode
At outdoor temperature > DOAIC
At outdoor temperature DOAIC
In heating mode
At outdoor temperature > DOAIW
At outdoor temperature DOAIW
C : Cooling PWF : Powerful W : Heating
Input current detected with CT: I IN
Compressor stops.
I3 - Iα
I3
I4
Return zone
Steady zone
Step down zone
Stop zone
I4 = 18.5A
Iα = 1A
(R1040)
I3 = I3C - 0.75 × (outdoor temp. DOAIC) At POWER FULL, both I3C and I3CPWF are used.
I3 = I3C At POWER FULL, both I3C and I3CPWF are used.
I3 = I3W - 0.25
× (outdoor temp. - DOAIW) At POWER FULL, both I3W and I3WPWF are used.
I3 = I3W At POWER FULL, both I3W and I3WPWF are used.
(a constant) 50 Class 60 Class 71 Class
I3C 10.50 A 12.50 A 15.25 A
I3CPWF 10.50 A 12.50 A 15.25 A
DOAIC 40.0˚C 37.5˚C 35.5˚C
I3W 17.50 A 17.50 A 17.50 A
I3WPWF 17.75 A 17.75 A 17.75 A
DOAIW 12˚C 12˚C 12˚C
SiBE04-101.book Page 35 Monday, October 15, 2001 3:08 PM

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