Troubleshooting
Diaphragm pump N026 EX
38
Translation of Original Operation and Installation Instruction, english, KNF 059217 11/19
10 Troubleshooting
DANGER
Danger to life from electric shock
à
All work on the pump may only be performed
by an authorized specialist.
à
Disconnect the pump power supply before
working on the pump.
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.
Pump does not transfer
Cause
Fault remedy
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 room fuse and switch on if necessary.
Connections or lines are blocked.
à
Check the connections and lines.
à
Remove the blockage.
External valve is closed or filter is
clogged.
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/valve
plate are worn.
à
Change the diaphragm and the reed valves/valve
plate
(see Chapter
Tab. 39
