Daikin UATYA-B, Operation Manual

Page: 96 / 126

96
Service manual Daikin R32 Rooftops UATYA-B
ESIE21-02 – 2021.03
4.2.7 Thermal overload switch alarm in ventilation unit
Ventilation in delivery line - Thermal overload switch alarm
Alarm code AL35
Reason for activation
When the system demands ventilation unit activation and the digital input corresponding to
the alarm is open after the time set in parameter “PAL25” has elapsed
Reset When the digital input closes
Reset mode Automatic; switches to manual after the trip occurrences per hour set in “PAL26”
Alarm icon Flashing
AlarmLog Yes
Alarm relay Based on “alarm.conf” file
Devices Behaviour in the event of an alarm
All devices The controller stops the operation of the unit.
Ventilation in return line - Thermal overload switch alarm
Alarm code AL36
Reason for activation
When the system demands ventilation unit activation and the digital input corresponding to
the alarm is open after the time set in parameter “PAL25” has elapsed
Reset When the digital input closes
Reset mode Automatic; switches to manual after the trip occurrences per hour set in “PAL26”
Alarm icon Flashing
AlarmLog Yes
Alarm relay Based on “alarm.conf” file
Devices Behaviour in the event of an alarm
All devices The controller stops operation of the fans in the return line.
External ventilation - Thermal overload switch alarm
Alarm code AL33 for circuit 1; AL34 for circuit 2
Reason for activation
When the system demands ventilation unit activation and the digital input corresponding to
the alarm is open after the time set in parameter “PAL47” has elapsed.
Reset When the digital input closes
Reset mode Automatic; switches to manual after the trip occurrences per hour set in “PAL48”.
Alarm icon Flashing
AlarmLog Yes
Alarm relay Based on “alarm.conf” file
Devices Behaviour in the event of an alarm
Source-side fans
The alarm is displayed for warning purposes only. The fans concerned are stopped
electro-mechanically.
The other devices They follow their control
4 Alarms