KNF N96 - 10 Troubleshooting - Electrical and Delivery Issues; Electrical Safety During Troubleshooting; Pump Not Delivering Issues

Troubleshooting Diaphragm pump N96
30 Translation of Original Operating and Installation Instruction, English, KNF 316836-316838 01/20
10 Troubleshooting
DANGER
Danger to life from electric shock
àAll work on the pump may only be performed
by an authorized specialist.
àDisconnect the pump power supply before
working on the pump.
àCheck and ensure that no voltage is present.
à
Check the pump (see following tables).
Pump not delivering
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 it on if neces-
sary.
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.
Max. voltage range of motor ex-
ceeded.
à
Disconnect pump from electrical mains.
à
The applied voltage must not exceed the value
specified in Chapter 7.3 Electrical connection.
Diaphragm and valves are worn or
defective.
à
Replace diaphragm and valves (see Chapter 9.3
Replacing diaphragm and valve plates).
Tab.29