Faults, causes and remedies
The troubleshooting must only be carried out by a qualified specialist, and
work on the electrical connection must only be carried out by a qualified
electrician.
Faults
Causes
Remedy
Pump is not
running although
the power supply
is switched on
Electrical fuse
defective
Check fuses
No voltage supply
at pump
Rectify the power
interruption
Noisy pump
Cavitation due to
insufficient suction
pressure
Increase the system
pressure within the
permissible range
Check the delivery head
and set it to a lower
head if necessary
Building does not
warm up
Thermal output of
the heating
surfaces is too low
Increase setpoint
Change the control
mode from
Δp-c to Δp-v
Fault signals
The fault signal LED indicates a fault.
The pump switches off (depending on the fault) an attempts a cyclical
restart.
LED
Faults
Causes
Remedy
Lights up
red
Blocking
Rotor blocked
Activate
manual
restart or
contact
customer
service
Contacting/
winding
Winding defective
Flashes
red
Under/overvoltage
Power supply too
low/high on mains
side
Check mains
voltage and
operating
conditions,
and request
customer
service
Excessive
module
temperature
Module interior too
warm
Short-circuit
Motor current too
high
Flashes
red/
green
Generator
operation
Water is flowing
through the pump
hydraulics, but there
is no mains voltage
at the pump
Check the
mains
voltage,
water
quantity/pre
ssure and
the ambient
conditions
Dry run
Air in the pump
Overload
Sluggish motor,
pump is operated
outside of its
specifications (e.g.
high module
temperature). The
speed is lower than
during normal
operation.
Activating factory setting
The factory setting is activated by pressing and holding the operating
button whilst switching off the pump.
Press and hold the operating button for atleast 4 seconds.
All LEDs flash for 1 second.
The LEDs for the last setting flash for 1 second.
Decommissioning
Shutting down the pump
Shut down the pump immediately if the connecting cable or other
electrical components are damaged.
Disconnect the pump from the power supply.
Contact a service technician
Maintenance
Cleaning
Carefully remove dirt from the pump on a regular basis using a dry
duster.
Never use liquids or aggressive cleaning agents.
Manual restart
The pump attempts an automatic restart
upon detecting a blockage.
If the pump does not restart automatically:
Activate manual restart via the operating
button: press and hold for 5 seconds, then
release.
-
The restart function is initiated, and lasts
max. 10 minutes.
-
The LEDs flash in succession clockwise.
To cancel, press and hold the operating
button for 5 seconds.
If the fault cannot be remedied, contact an
authorized service center.
NOTICE
After the restart, the LED display shows the previously
set values of the pump.
Venting
Fill and vent the system correctly.
If the pump does not vent automatically:
Activate the pump venting function via the
operating button:
Press and hold for 3 seconds, then release.
The pump venting function is initiated and lasts
10 minutes.
The top and bottom LED rows flash in turn at
1 second intervals.
To cancel, press and hold the operating
button for 3 seconds.
NOTICE
After venting, the LED display shows the previously set
values of the pump.
Lock/unlock the button
To activate the key lock, press and hold the
operating button for 8 seconds until the LEDs
for the selected setting briefly flash, then
release.
-
LEDs flash constantly at 1-second intervals.
-
The key lock is activated: pump settings can
no longer be changed.
The key lock is deactivated in the same
manner as it is activated.
NOTICE
All settings/displays are retained if the power supply is
interrupted.
Instruction for projecting
