Daikin UATYA-B, Operation Manual

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Service manual Daikin R32 Rooftops UATYA-B
ESIE21-02 – 2021.03
CPY humidifier – Communication error alarm
Alarm code AL164
Reason for activation Communication error with CPY board
Reset As soon as serial communication with CPY board is restored.
Reset mode Automatic
Alarm icon Flashing
AlarmLog Yes
Alarm relay Based on “alarm.conf” file
Devices Behaviour in the event of an alarm
Humidifier According to parameters set in CPY board
The other devices They follow their control
4.3.4 Heater alarms
The parameters involved are shown in the table.
The values of the parameters are representative. In specific cases, different values can be set.
Parameter Value UM Description
PAL34 5 s Activation delay
PAL35 5 - Max. number of alarms in one hour
Thermal overload switch
Alarm code AL250 for heater 1; AL251 for heater 2
Reason for activation Upon opening of the relevant digital input after the delay set in parameter “PAL34”
Reset As soon as the relevant digital input closes.
Reset mode Automatic; switches to manual after the trip occurrences per hour set in “PAL35”
Alarm icon Flashing
AlarmLog Yes
Alarm relay Based on “alarm.conf” file
Devices Behaviour in the event of an alarm
Heaters The controller stops the involved heaters.
The other devices They follow their control
4 Alarms