Daikin UATYA-B, Operation Manual

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Service manual Daikin R32 Rooftops UATYA-B
ESIE21-02 – 2021.03
3.9.7 Special conditions
There are some operating modes during which the controller adjusts ventilation in a special way.
3.9.7.1 Ventilation management during defrosting
For enhanced room comfort during the defrost cycle, the fan in the delivery line follows the setpoint in parameter “FA81”.
This only applies when either a constant or variable flow control is featured and parameter “FA82” is set to “1”.
Reduced air flow during the defrost cycle enhances room comfort, but it also reduces the efficiency of the
defrost cycle.
Great attention should be paid when setting reduced flow parameters.
Very low flow values may cancel the defrost cycle efficiency.
3.9.7.2 Ventilation management during dehumidification
In cases when priority is given to dehumidification or when the dehumidification function only is enabled and ventilation is
controlled based on the flow rate (constant or variable/percentage), operation is set to follow the dehumidification flow rate
setpoints.
The setpoint value is entered in parameter “FA11”.
3 Software functions