Pump Does Not Prime In Spite Of Full Stroke Movement And Bleeding; Float Switch Does Not Switch The Metering Pump Off At Minimum Chemical Level; Pump Does Not Meter Although Yellow Display Lamp (1) Flashes - ProMinent gamma G/4b Operating Instructions Manual

Possible cause:
Possible cause:
Possible cause:
Other possible cause:
Remedy for SS and TT pumps :
Remedy for NP and PP pumps:
Version 2.0
Troubleshooting/Eliminating Errors
ATTENTION:
Only set the stroke length when the pump is running and when the
setting bolt of the metering stroke is briefly relieved.
14.1.1 Pump does not prime in spite of full stroke movement and
bleeding
Crystalline deposits due to dryed out valves
Remedy: • Remove suction hose from the supply tank and rinse the liquid end
well.
• If there is no improvement the valves should be disassembled and
cleaned.
• The valve insert in the suction and discharge valve can be pushed out
with a 3 mm punch.
14.1.2 Float switch does not switch the metering pump off at
minimum chemical level
Float is blocked.
Remedy: • Remove deposits and clean float.
14.1.3 Pump does not meter although yellow display lamp (1)
flashes
The stroke length is set to "zero" or no value is set.
Remedy :
• Increase the stroke length with the adjustment knob (3).
Air is trapped in the liquid end.
• Relieve the discharge line of pressure using the overflow or relief valve,
or by releasing the discharge line at the injection valve or discharge
connection of the pump. In doing so protective clothing (glasses,
gloves) are to be worn.
• Bleed by quick priming - simultaneously press the
keys until the suction line and liquid end are filled free of bubbles.
• Do not loosen the discharge line as the bleed valve is present.
• Open the bleed valve (17) by max. 1 turn anti-clockwise.
• Quick priming - simultaneously press the
the suction line and liquid end are filled free of bubbles.
• Close the bleed valve.
and
and keys until
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