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© Verder Liquids B.V
Ds500, Ds500+ Operating manual
Original instructions (en)
Problem
Cause
Solution
Low flow / low discharge pressure
Excessive back pressure.
Reduce discharge pressure to within
working parameters.
Increase external pipework diameter.
Blockage in the line.
Check for blockage and remove.
Pump not calibrated to specific application.
Perform the calibration procedure.
Premature cartridge failure
Excessive back pressure causing
backflow.
Reduce discharge pressure to within
working parameters.
Increase external pipework diameter.
Excessive temperature of pumped
medium.
Reduce temperature of medium.
Flow rate inaccurate
Pump not calibrated to specific application
Perform the calibration procedure.
Excessive noise
Pulsation due to excessive discharge
pressure.
Reduce discharge pressure to within
working parameters.
Increase external pipework diameter.
Check pipework dimensions. Eliminate
small radius bends.
Pump won’t start
Pump head issue when in 4-20mA or
contact mode (remote control).
Address pump head issue.
Enable alarm output to show fault status.
Table 16. - Troubleshooting