BE-LCD-01 Operating and Installation Manual / Leaflet no. M375EV8 (01/2015)
13
5 Operation · Fume cupboard control
Controller faults
Code
Message
Explanation
Actions, remedial measures
H1
24 V
undervoltage
The supply voltage is too low. The sensors and
actuators are no longer supplied with sufficient
power.
Check the power supply to the
system.
H2
AI
characteristic
Analogue input signal is outside of the characteristic.
Check the voltage signal or
sensor. Check the characteristic
parameters stored in the
controller.
H3
Supportive
flow fan fault
The feedback signal from the supportive flow fan is
missing. The fan has been switched off, or the cable
is no longer connected. The controller automatically
raises the volume flow rate to the value that has been
set for this case.
Check the feedback signal and the
supportive flow fan.
Control panel faults
Code
Message
Explanation
Actions, remedial measures
E1
Connection
lost
Communication between the control panel and the
fume cupboard controller has been interrupted.
For technical reasons, this text always appears in
English.
Check the cable connection, the
control panel, and the controller.
E2
CP-CRC
failure
Communication between the control panel and
the fume cupboard controller is faulty. For technical
reasons, this text always appears in English.
Check the cable connection, the
control panel, and the controller.
E3
CP not
possible
The control panel cannot be used with the controller
to which it is connected. The control panel must be
connected to a configured fume cupboard controller
or to a controller with active room management
function.
Check the wiring, assignment, and
configuration.
E4
CP memory
A hardware error occurred while accessing the
internal memory.
If the error occurs again, replace
the control panel.
Operating states, alarm messages, fault displays