KNF LABOPORT N820.18 Originalbetriebsanleitung Seite 121

Chemically-resistant Laboratory pump N820.18 / N840.18
Pump is switched on and not running; status display illuminates red (100%
ON)
Cause
Drive of the pump has
blocked.
Pump is switched on and not running; status display flashes red (90% ON,
10% OFF)
Cause
Other fault
Translation of Original Operating Instruction, KNF 317428-317425 02/23
Fault remedy
à
Pull power cable of the pump out of the socket.
à
Allow the pump to cool.
à
Determine the cause of the blockage and rectify.
Tab.31: Troubleshooting: Pump is switched on but not running; sta-
tus display lights up red
Fault remedy
à
Pull power cable of the pump out of the socket.
à
Allow the pump to cool.
à
Contact KNF Customer Service.
Tab.32: Troubleshooting: Pump is switched on but not running; sta-
tus display is flashing red
Fault cannot be rectified
If you are unable to identify any of the specified causes, send
the pump to KNF Customer Service (contact data: see
www.knf.com).
1. Flush the pump with air for a few minutes (if necessary for
safety reasons: with inert gas) at atmospheric pressure to
free the pump head of dangerous or aggressive gases
(see Chapter Flushing the pump).
2. Clean the pump (see Chapter Cleaning the pump).
3. Send the pump together with completed Health and
Safety Clearance and Decontamination Form to KNF,
specifying the pumped medium.
Troubleshooting
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