Troubleshooting
Diaphragm pump N680 EX
40
Translation of Original Operation and Installation Instruction, english, KNF 325438 02/22
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).
à
Also observe the operating instructions for the motor when trou-
bleshooting.
à
Also observe the operating instructions for the coupling when trou-
bleshooting.
Pump not delivering
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 pneumatic connections and lines.
à
Remove the blockage.
External valve is closed or filter is
clogged.
à
Check external valves and filters.
Condensation has collected in the
pump head.
à
Separate the source of the condensation 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.
à
Change the diaphragm and the reed valves
(see Chapter
Tab.24
