BE-LCD-01 Operating and Installation Manual / Leaflet no. M375EV8 (01/2015)
18
Operating states
Code
State
Actual state, explanation
Actions, remedial measures
PF
UPS, battery
operation
The connected power supply has failed. The control
is maintained by the battery pack.
Eliminate the cause of the power
failure.
S1
Test function
The general test function, triggered by the
configuration software, is active, e.g. actuator test.
³
Diversity active
Too many sashes are open. The set threshold for the
room total extract air has been exceeded; diversity
control is active. The volume flow rate has been
reduced for some fume cupboards.
Close some sashes.
³
Door switch
The door contact is active and affects pressure
control.
Operating states, alarm messages, fault displays
¹ Warning display permanently on
³ Warning display blinks
² Acoustic signal
Alarm messages
Code
State
Explanation
Actions, remedial measures
A1
Volume flow
rate too high
The volume flow rate exceeds the setpoint value.
Check the actuator and the
controller.
A2
Volume flow
rate too low
The volume flow rate falls short of the setpoint value.
Check the pressure. Check the
volume flow rate transducer.
A4
Σ extract air is
too high
The set threshold for the room total extract air has
been exceeded; diversity control is active.
Close some sashes.
A5
Differential
pressure is too
high
The differential pressure is too high.
For negative pressure: Room pressure is too low.
For positive pressure: Room pressure is too high.
A6
Differential
pressure is too
low
The differential pressure is too low.
For negative pressure: Room pressure is too high.
For positive pressure: Room pressure is too low.
A7
Σ extract air is
too low
The total room extract air falls short of the set
threshold for the total room extract air.
Check the pressure. Check the
volume flow rate transducer.
5 Operation · Room control