Diaphragm-liquid pump NF 1.60
Troubleshooting
KNF Flodos AG BA_NF1.60_EN_05_161566.docx
Translation of Original Operating and Installation Instructions
17
9. Troubleshooting
Pump does not work
Cause
Fault remedy
Pump not connected to mains
power supply
Connect pump to mains supply
Power supply is not switched on
Switch on power supply
Thermal switch or pump
electronics have tripped
Disconnect pump from mains power supply
Allow pump to cool
Identify and eliminate cause of overheating/overload
Connections or pipes are
blocked
Check pipes and connections
Remove blockage
External valve is closed or filter
is blocked
Check external valves and filters
Diaphragm, valve plates or
seals are worn out
Replace diaphragm, valve plates and seals
(see Chapter 8.3)
Tab. 11
Pump is not priming
Cause
Fault remedy
Suction side of pump not
connected
Connect the suction side of the pump
Liquid in the priming container is
too low
Fill priming container
Hose connections are not leak-
tight
Secure transition joints between hose and connections with
clamps or other clamping elements
System valve is closed or filter
is blocked
Open the system valve
Clean filter
Pump head is filled with gas.
The system is unable to handle
the pressure on the pressure
side.
Reduce pressure on pressure side
Particles in the pump
Clean the pump head (see Chapter 8.2)
The pump parts are not
resistant to the medium to be
pumped
Replace the pump head with a compatible version
Incorrect interchange of outlet
and inlet line connections
Remove outlet and inlet lines and re-connect correctly
Tab. 12
