Appendix D
Alarm list
The alarm text, priority and delay columns show the factory set values.
D.1
Alarm text
Prio
Delay
Limit
Description
Malfunction supply air
fan
B
120s
Malfunction supply air fan
Malfunction extract air
fan
B
120s
Malfunction extract air fan
Filter alarm supply air
B
180s
Filter alarm supply air pressure switch
Filter alarm extract air
B
180s
Filter alarm extract air pressure switch
Fire alarm
A
0s
Fire alarm activated
Electric heating is
overheated
A
0s
Heater high temperature limit switch activated
Warning freeze
protection
B
0s
Frost protection function is overriding the control of the heater
output
Defrosting alarm
-
2s
Exchanger deicing activated by deicing sensor
Internal battery error
A
0s
Internal battery needs replacing
Restart blocked after
power on
B
0s
Restart blocked due to earlier power failure
Deviation alarm supply
air temp.
B
30min
10 °C
Supply air temp deviates too much from the setpoint
Freeze protection alarm A
0s
Frost protection temperature below frost limit value
Manual operation air
handling unit
C
0s
The unit is in manual mode
Manual operation
supply air
C
0s
Supply air temp controller in manual control
Manual operation
supply air fan
C
0s
Supply air fan in manual control
Manual operation
extract air fan
C
0s
Extract air fan in manual control
Manual operation heater C
0s
The heater is in manual mode
Manual operation
exchanger
C
0s
Heat exchanger output in manual control
Manual operation cooler C
0s
Cooling output in manual control
Manual operation
damper
C
0s
Damper output in manual control
Manual operation pump
heater
C
0s
Heating circulation pump in manual control
Manual operation pump
cooler
C
0s
Cooling circulation pump in manual control
Manual operation
damper outdoor air
C
0s
Fresh air damper in manual control
Manual operation
damper exhaust air
C
0s
Exhaust air damper in manual control
Manual control
sequence A
-
0s
Manual control of sequence A
Manual control
sequence B
-
0s
Manual control of sequence B
Manual control
sequence C
-
0s
Manual control of sequence C
72 (76)
Optigo
Ardo
manual, Rev. A