6 Troubleshooting
Before starting any troubleshooting, you should check the following simple
things:
■
Have all connectors been properly plugged in and secured at the
SP-Guard and at all sensors?
■
Has the DC power supply been provided to the SP-Guard?
Malfunction /
SP-Guard
display
Possible cause Remedy Responsibility
Failure oil temp Oil temperature has exceeded the error
threshold.
Temporary temperature increase during
shutdown due to reduced cooling.
After switching off the pump open the cooling unit
and clean the heat exchanger with compressed
air.
Wait for the cooling down phase to complete.
Maintenance
personnel
Operator
Failure vibration Vibration level has exceeded the error
threshold.
There are foreign objects or deposits in
the pump.
Check whether there is in the immediate vicinity
of the pump a different vibration source.
Contact our service technician.
Operator and
maintenance
personnel
Failure exhaust
pressure
Exhaust pressure exceeds the max. per-
missible pressure of 1200 mbar.
Check to see if the exhaust line is blocked.
Remove blockage.
Operator and
maintenance
personnel
Failure oil level Oil level drops below the minimum. With the pump at standstill top up oil until the oil
level is again within the optimum range. Note any
visible losses of oil and if required contact our
service.
Maintenance
personnel
vibration > 20
with the pump at
standstill.
Inadequate potential equalisation causes
leakage currents via the SP-Guard.
Emitted interference
Conducted interference
Loose connector
Separate power supply output GND / 0V from PE
to stop leakage currents.
Note the local regulations regarding installation
and operation of safety extra-low voltage (SELV)
systems. If required, connect the pump to ground
through additional ground connections.
For the purpose of complying with the maximum
permissible limits for a emitted interferences,
shielded cables between frequency converter
and screw pump must be used, if required.
In order to reduce conducted interferences, use a
motor filter at the output of the frequency con-
verter, if required.
The power supply connector at the SP-Guard
must be checked to ensure that it is firmly seated.
Maintenance
staff
Maintenance
staff
Maintenance
staff
Maintenance
staff
Display is dark
and difficult to
read.
Ambient temperature is too high. Let the SP-GUARD cool down and keep the
ambient temperature below 40 °C.
Operator
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