Stepping motor diaphragm metering pump FEM 1.02 / FEM 1.09
Troubleshooting
KNF Flodos AG BA_FEM1-02_1-09_EN_07_157639.docx
Translation of Original Operating and Installation Instructions
24
9. Troubleshooting
Disconnect the pump power supply before working on the pump.
Make sure that the pump is de-energised.
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
Connections or hoses are
blocked
Check connections and hoses
Remove blockage
External valve is closed or filter
is clogged.
Check external valves and filters
Diaphragm or valve disk are
worn
Replace diaphragm and valve disk
(see Chapter 8.3)
Tab. 15
Pump is not priming
Cause
Fault remedy
Suction side of pump not con-
nected
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 clogged
Open system valve
Clean filter
Pump head is filled with gas.
System unable to handle pres-
sure at pressure side
Reduce pressure at pressure side
Particles in the pump
Clean pump head (see Chapter 8.2)
The pump parts are not re-
sistant to the medium to be
pumped
Replace the pump head with a compatible version
Incorrect interchange of outlet
and inlet line connections
Remove pressure and suction lines and re-connect correctly
Tab. 16
