Daikin Super Multi NX FFQ50B8V1B User Manual

Control Specification SiBE121021_C
118 Function and Control
4.5 Input Current Control
Outline An input current is detected by the CT during the compressor is running, and the frequency
upper limit is set from the input current.
In case of heat pump model, this control, which is the upper limit control of the frequency, takes
priority to the lower limit control of four way valve operation compensation.
Detail
Frequency control in each zone
Stop zone

After 2.5 seconds in this zone, the compressor is stopped.
Drooping zone

The upper limit of the compressor frequency is defined as operation frequency – 2 Hz.

After this, the output frequency is pulled down by 2 Hz every second until it reaches the keep
zone.
Keep zone

The present maximum frequency goes on.
Reset zone

Limit of the frequency is canceled.
Limitation of current drooping and stop value according to the outdoor temperature

The current droops when outdoor temperature becomes higher than a certain level
(depending on the model).
4.6 Freeze-up Protection Control
Outline During cooling operation, the signals sent from the indoor unit control the operating frequency
limitation and prevent freezing of the indoor heat exchanger. (The signal from the indoor unit is
divided into zones.)
Detail The operating frequency limitation is judged with the indoor heat exchanger temperature 2
seconds after operation starts and 30 seconds after the number of operation room is changed.
Compressor Stop
Drooping Zone
Stop Zone
Keep Zone
Reset ZoneInput current
(R14355)
(R14218)
Reset zone
Up zone
Keep zone
Drooping zone
Stop zone
0˚C
3˚C
5˚C
7˚C
13˚C
(Reference)
Indoor heat exchanger
thermistor temperature

Daikin Super Multi NX FFQ50B8V1B Specifications

General

Brand	Daikin
Model	Super Multi NX FFQ50B8V1B
Category	Air Conditioner
Language	English