Troubleshooting; Decommissioning And Disposal - ProMinent ProMus Series Operating Instructions Manual

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Troubleshooting/ Decommissioning and Disposal

12. Troubleshooting

WARNING
• Always wear appropriate protective equipment when working with hazardous chemicals
• Always depressurize the suction and discharge lines before working on the pump.
• Always empty and rinse the liquid end before maintenance and repair work!
Pump Fails To Meter Liquid To Pump Specification Pump Fails To Meter
Liquid To Pump Specification
or
Pump Does Not Prime Despite Full Stroke Action And Venting
Cause: Valves dirty or worn
Remedy: Overhaul valves (see "Overhaul valves", see "Repair" section)
Cause: Internal relief valve open (outlet pressure higher than internal relief valve setting)
Remedy: Reduce pressure in external backpressure valve
Cause: Internal relief valve heavily worn as discharge line blocked or constricted
Remedy: Replace external backpressure valve and remove blockage from discharge line
Cause: Hydraulic oil low
Remedy: Add hydraulic oil until oil level has reached inspection port on the side of the pump
housing (see "Replace Diaphragm":, "Maintenance" section)
Cause: Electrical connections to motor
Remedy: 1. Verify voltage and frequency
2. Check motor connections
Power End Motor Very Hot
Cause: Discharge line greatly constricted
Remedy: 1. Remove blockage from discharge line
2. Check external backpressure valve

13. Decommissioning And Disposal

Decommissioning
WARNING
• Pumps and peripherals are to be maintained and repaired by trained and authorised
personnel only!
ProMinent