20
Alarm message Countermeasure
Pa INIT
ALARM
Volumetric flow
is too high.
Alarm display
[15] = On.
Relay R1 in
alarm state
(Relay
LED = On)
The required volumetric flow
cannot be achieved as the
value is outside the working
scope of the fan.
Modify the volumetric flow.
Check the ventilation
system.
Modify the layout of the
ventilation system.
Reference pressure cannot
be determined. Motor
switches to soft stop mode.
To restart, press and hold
the REST button [17] until
the alarm display goes out.
The control unit now works
as per its settings, but
without pressure alarm.
If a pressure alarm should
be set up, troubleshoot the
cause of the fault and
eliminate it, e.g. system
pressure or volumetric flow
too high. Then set the
parameter.
Pa INIT
ALARM
Pressure is
not stable.
Alarm display
[15] = On.
Relay R1 in
alarm state
(Relay
LED = On)
Pressure is too unstable.
Modify the volumetric flow.
Check the ventilation
system.
Modify the layout of the
ventilation system.
Reference pressure cannot
be determined. Motor
switches to soft stop mode.
To restart, press and hold
the REST button [17] until
the alarm display goes out.
The control unit now works
as per its settings, but without
pressure alarm.
If a pressure alarm should be
set up, troubleshoot the cause
of the fault and eliminate it,
e.g. system pressure or
volumetric flow too high. Then
set the parameter.
Alarm message Countermeasure
CA ALARM
The volumetric
flow is too low.
The required volumetric
flow cannot be reached or
held constant, as the
counter pressure gene-
rated by the fan is too high.
Modify the volumetric flow.
Check the ventilation
system.
Modify the layout of the
ventilation system.
CA ALARM
Volumetric
flow is too
high.
The required volumetric flow
cannot be held constant as
the value is outside the
working scope of the fan.
Modify the volumetric flow.
Check the ventilation
system.
Modify the layout of the
ventilation system.
CP ALARM
Pressure is
too high
Minimum volumetric flow
reached. The measured
pressure is still higher than
the required pressure.
Modify the volumetric flow.
Check the ventilation
system.
Modify the layout of the
ventilation system.
Check whether the
pressure lines [6] and [14]
are dirty.
Clean any line that is dirty
and replace them with
standard hoses of the
same quality and with the
same internal diameter if
necessary.
Make sure the pressure
line is correctly fitted at
the connection piece.
GB
