KNF N922SPE, Translation Of Original Operating And Installation Instructions

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Diaphragm pump N922S_E IP54 Troubleshooting
Translation of Original Operating and Installation Instruction, english, KNF 318667-318664 05/21 31
10 Troubleshooting
DANGER
Danger: electric shock can be life-threatening.
à
All work on the pump may only be performed
by an authorized specialist.
à
Before working on the pump: Disconnect the
pump from the power supply.
à
Check and ensure that no voltage is present.
à
Allow the pump to cool before troubleshooting.
à
Check the pump (see following tables).
Unit not pumping
Cause Troubleshooting
Pump is not connected to the elec-
trical mains.
à
Connect the pump to the electrical mains.
No voltage in the electrical mains. à
Check the circuit breaker for the room and switch
it on if necessary.
Pneumatic connections or lines are
blocked.
à
Check the connections and lines.
à
Remove the blockage.
External valve is closed or filter is
plugged.
à
Check external valves and filters.
Condensate has collected in the
pump head.
à
Separate the source of the condensate from the
pump.
à
Flush the pump with air at atmospheric pressure
for a few minutes (if necessary for safety reasons:
with an inert gas).
à
Install the pump at the highest location in the sys-
tem.
Diaphragm or reed valves are worn
or defective.
à
Change the diaphragm and valve springs (see
Chapter Changing diaphragm and reed valves).
Max. voltage range of motor ex-
ceeded.
à
Disconnect pump from electrical mains.
à
The applied voltage must not exceed the value
specified in Chapter
7.3 Electrical connection .
Tab.13