21
ProMinent
®
Repair / Troubleshooting
8 Repair
Repairs which may be carried out by qualified persons (according to
safety instructions):
• Cleaning a valve
• Replacing the diaphragm (installation instructions included with
replacement diaphragm)
For all other repairs consult your ProMinent
®
Subsidiary.
9 Troubleshooting
The pump does not prime despite full stroke action and venting
Cause: Crystalline deposits on the ball seat due to valves drying out.
Remedy: Remove suction hose from the supply tank and rise liquid
end thoroughly.
If unsuccessful, dismantle valves and clean.
Fluid is leaking from the head washer
Cause: The liquid end is leaking at the pump diaphragm.
Remedy: Screw in the liquid end anti-clockwise (torque: 4.5 to 5 Nm)
If unsuccessful, replace the diaphragm (installation instructions
included with the diaphragm).
Error/operating indicator not lit
Cause: No or incorrect mains voltage.
Remedy: Use mains voltage as specified on the rating plate.
Error/operating indicator lit red
Cause: Liquid level in the supply tank has reached “low liquid level”.
Remedy: Top up supply tank.
Cause: Electronic failure.
Remedy: Send pump away for repair.
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