KNF Labor N022.18 Manual De Instrucciones página 110

Troubleshooting
Pump not delivering
Cause
No voltage in the elec-
trical mains.
Thermal switch or
overtemperature pro-
tection of the pump has
tripped
Connections or lines
are blocked.
External valve is closed
or filter clogged.
Condensation has col-
lected in the pump
head.
Diaphragm or valves
are worn.
50
10 Troubleshooting
DANGER
à
Check the pump (see following tables).
Troubleshooting
à
Check the circuit breaker for the room and switch it
on if necessary.
à
Disconnect the pump from electrical mains.
à
Allow the pump to cool down.
à
Determine the cause of the overheating and rectify.
à
Check the connections and lines.
à
Remove the blockage.
à
Check external valves and filters.
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
Replace the diaphragms and the valve plates/seals
(see Chapter 8 Servicing [} 32]).
Tab.35: Troubleshooting: Pump not delivering
Translation of Original Operating Instruction, KNF 121224-121388 04/23
Diaphragm pump N022.18, N026.18
Danger: electric shock can be life-
threatening.
à
All work on the pump may only be
performed by an authorized spe-
cialist.
à
Before working on the pump: Dis-
connect the pump from the power
supply.
à
Check and ensure that no voltage
is present.