5
Troubleshooting
Fault
description
Cause
Remedy
Pump does
not run when
power supply
is switched
on
Electrical fuse
defective, pump
has no power
Check the fuses, eliminate the power interruption.
Pump makes
noises
Cavitation
caused by insuffi-
cient inlet pres-
sure
Increase the system pressure within the permissible area, check the
delivery height setting and set a lower height if necessary
Power supply
undervoltage
Power supply
overloaded
The motor is switched off in the case of overvoltage or undervoltage. It
starts again automatically as soon as the voltage is again in the per-
mitted area. SSM relay is active. Off: 165 V AC / On: 195 V AC
Power supply
overvoltage
Faulty feed from
the energy
supply company
Faulty feed from the energy supply company. The motor is switched off
in the case of overvoltage or undervoltage. It starts again automatically
as soon as the voltage is again in the permitted area. SSM relay is
active. Off: 265 V AC / On: 245 V AC
Motor
jammed
e.g. due to
deposits
If the motor jams, a maximum of 5 restarts at 30 second intervals take
place. If the motor remains jammed, it is switched off permanently. It can
only be switched back on again by switching off the power for more than
30 seconds and then switching it on again. The unjamming programme
runs during each start process. The SSM relay is active as long as the
internal error counter is not ZERO.
Motor over-
load
Deposits in the
pump
If the power consumption of the motor exceeds the limit for more than
60 seconds, the "Overload" error is reported. The motor is stopped and
started again after a 30 second pause. If no overloading occurs within
the next 2 minutes, the internal error counter is reset. Otherwise, the
motor is switched off permanently after 5 unsuccessful restarts. This can
only be reset by switching the power off for more than 30 seconds. The
SSM relay is active as long as the internal error counter is not ZERO
Short circuit/
earth
leakage
Motor defective
The motor is switched off after a short circuit. It is switched on again
after 30 seconds. The motor is switched off permanently after 5 short
circuits. This can only be reset by switching the power off for more than
30 seconds. The SSM relay is active as long as the internal error
counter is not ZERO
Contact error The module is
not connected
correctly. Con-
nection between
motor and
module inter-
rupted
If the contact between the motor and the module fails, the motor is
switched off. A restart occurs after 30 seconds. After the motor has
been switched off for the fifth time, it is switched off permanently. This
can only be reset by switching the power off for more than 30 seconds.
The SSM relay is active as long as the internal error counter is not
ZERO.
Running
empty
Air in the pump
The motor is switched off after a defined period of time when running
under dry running conditions. It starts again after a delay of 30 seconds.
If no dry run occurs within the next 2 minutes, the internal error counter
is reset. Otherwise, the motor is switched off permanently after 5 unsuc-
cessful restarts. This can only be reset by switching the power off for
more than 30 seconds. The SSM relay is active as long as the internal
error counter is not ZERO.
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