KNF N 922 Ex, Инструкция по эксплуатации и монтажу

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Diaphragm pump N922 EX Troubleshooting
Translation of Original Operation and Installation Instruction, english, KNF 313600 11/19 39
Flow rate, pressure or vacuum too low
The pump does not achieve the flow rate specified in the technical specifications or
in the data sheet.
Cause Fault remedy
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.
There is overpressure on the pres-
sure side and at the same time
vacuum or pressure above atmo-
spheric pressure on the suction
side. à
Change the pneumatic conditions.
Pneumatic lines or connection
parts have insufficient cross sec-
tion or are throttled.
à
Disconnect the pump from the system to deter-
mine the output values.
à
Eliminate throttling (e.g., valve) if necessary.
à
Use lines or connection parts with larger cross
section if necessary.
Leaks occur at connections, lines
or pump head.
à
Eliminate the leaks.
Connections or lines are com-
pletely or partially plugged.
à
Check the connections and lines.
à
Remove parts and particles that are causing the
plugging.
Head parts are soiled.
à
Clean the head components.
Working diaphragm broken
à
Stop pump immediately.
Diaphragm or reed valves/valve
plate are worn.
à
Change the diaphragm and the reed valves/valve
plate
(see Chapter
9 Servicing ).
Pump exhibiting changed running
noises and vibrations.
à
Stop pump immediately.
à
Contact KNF Customer Service.
Tab. 41
Pump exhibiting changed running noises and vibrations.
Cause Fault remedy
Pump bearing worn or defective.
à
Determine the cause.
à
Contact KNF Customer Service.
Motor worn or defective.
à
See operating instructions for motor.
Coupling worn or defective.
à
See operating instructions for coupling.
Tab. 43