Swing Piston Pumps NPK 09
Troubleshooting
Translation of original Operating Instructions, English, KNF 121576-121579 11/20
19
10. Troubleshooting
For pumps with AC motor:
DANGER
Extreme danger from electrical shock!
➔
Disconnect the pump power supply before working
on the pump.
➔
Make sure the pump is de-energized and secure.
For pumps with DC motor:
➔
Disconnect the pump power supply before working on the
pump.
➔
Make sure the pump is de-energized and secure.
Check the pump (see Tab. 14 and 15).
Pump does not transfer
Cause
Fault remedy
Thermal switch has operated
following to over-heating.
➔
Disconnect pump from mains.
➔
Allow pump to cool.
➔
Identify and eliminate cause of overheating.
Connections or lines blocked.
➔
Check connections and lines.
➔
Remove blockage.
External valve is closed or filter
is clogged.
➔
Check external valves and filters.
Condensate has collected in
pump head.
➔
Install pump at highest point in system.
Piston seal or valve plates are
worn.
➔
Replace piston seal and valve plates (see Chapter 8)
Tab. 14
Summary of Contents for NPK 09
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