KNF N963, Инструкции по эксплуатации и монтажу

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Diaphragm Pump N936 Troubleshooting
Translation of Original operating and installation instruction, English, KNF 320276-320275 09/19 25
10 Troubleshooting
DANGER
Danger to life from electric shock
à
All work on the pump may only be performed
by authorized specialists.
à
Disconnect the pump power supply before
working on the pump.
à
Check and ensure that no voltage is present.
Check the pump (see following tables).
Pump does not transfer
Cause Fault remedy
Pump is not connected to the elec-
trical mains.
à
Connect pump to the electrical mains.
No voltage in the electrical mains. à
Check room fuse and switch on if necessary.
Connections or lines are blocked. à
Check connections and lines.
à
Remove 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 pump at the highest location in the system.
Diaphragm or reed valves are worn
or defective.
à
Replace diaphragm and reed valves (see Chapter
Changing diaphragm and reed valves).
Thermal switch of the motor has
tripped.
à
Disconnect pump from electrical mains.
à
Allow pump to cool.
à
Determine cause of the overheating and rectify.
Diaphragm, valves or O-rings are
worn or defective. à
Changing diaphragm, valves or O-ring (see
Chapter
9.3 Replacing diaphragm, valves and O-
rings ).
Tab. 13