Jesco MEMDOS E, Руководство по эксплуатации

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13. Troubleshooting
Problem Possible cause Remedy
Dosing pump not
delivering or output
too low Valves leaking or blocked Clean the valves and vent the dosing pump.
See also "Start-up"
Tighten the screw connections.
Valves incorrectly installed Reassemble the valves.
Ensure that the valve balls are located above
the valve seats.
Suction valve or suction line
leaking or blocked Clean or seal the suction line.
Suction lift too high - Set the dosing pump at the inlet.
- Install the pulsation damper on the suction
side.
- Install a priming aid.
Viscosity too high - Install spring-loaded valves.
- Increase the pipe diameter.
- Use the special dosing head.
>> Contact manufacturer
No stroke movement Dosing pump set to zero stroke Set the stroke length adjusting knob cor-
rectly.
Diaphragm return spring broken Replace the spring.
Power supply interrupted Switch on power supply.
Dosing pump delivery
rate too high Suction side pressure too high
(pump siphoning) Install a back-pressure valve on the
discharge line.
Diaphragm cracks
frequently Diaphragm not screwed up to
the end stop on the diaphragm
rod Screw a new diaphragm up to the end stop.
On E/DX 50...76, the support plate must
be clamped firmly between diaphragm and
diaphragm rod.
System back pressure too high
(measured at discharge connec-
tion of dosing pump) Inspect the system. Clean blocked injection
nozzle. Install pulsation dampers to reduce
pressure spikes if pipes are too long. Check
that safety valves are working (see installa-
tion example).
Media sediment in dosing head Clean the dosing head.
Dosing pump very
noisy Roller bearing defective Replace the roller bearing.
No oil in the gearing, or too little Top up the oil as described in "Mainte-
nance".
Motor hums and
does not start. Wrongly connected Check electrical wiring.
Capacitor defective, wrong size
or connected incorrectly Connect the capacitor correctly or replace.
Pressure too high Check the process.
Alarm states indi-
cated by red LEDs on
the display Level pre-alarm
Level main alarm
Internal error Check the functions as described in section
8 (MEMDOS DX operation).
Pump switches off
by itself. Pump inadvertently discon-
nected from power supply. Use only an external switch-off to switch the
pump on/off. See paragraph 7.4 and 8.2
If the problem cannot be solved with the above remedies, please return the dosing pump to the factory or contact our After-
Sales Service for further assistance. Repairs will be carried out immediately.
Troubleshooting | Operation & Maintenance Instructions |
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