ProMinent Duodos 20 PPS Assembly And Operating Instructions Manual page 22

Air-driven double diaphragm pump
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Troubleshooting and fault elimination
Air bubbles in the feed chemical.
Cause:
The diaphragm is faulty.
The suction hose is loose or broken.
Leaks or air pressure fluctuating between 3 ... 8 bar.
Cause:
The directional valve is closed or faulty.
Pump does not start. No regulated air pressure.
Cause:
Immovable air pressure sensor.
Close directional valve.
22
Recommended measure:
Remove and check the pump and replace the dia‐
phragm.
Fasten or replace the suction hose.
Recommended measure:
Replace the components of the directional valve.
Recommended measure:
Replace the air pressure sensor.
Replace the components of the directional valve.

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Duodos 20 pvt11033811103378

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