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7. Failures
Before attempting to resolve any problem, always disconnect the pump from the power supply and
depressurise it.
Problem
Cause
Electric motor does
Faulty circuit breaker
not work
Thermal protection activated
Cord/plug defective
Pump fails to reach
Not properly vented
pressure
Relief valve is open (if used)
Inlet pressure too low
No fluid flow
Collars defect
Overflow valve defect
Pressure fluctuates
Contaminated suction filter
Porous inlet hose
Overflow valve defect
Hoses/couplings incorrectly
installed
Pump "bumpy"
Dirty and/or faulty valves
Pump drawing in air
Pump leaks water
Loose coupling or bolts
Loose hose or hose clamps
Collars leak
Pump leaks oil
Defective seals
Table 7 Troubleshooting
IBAN NL71 RABO 0340341610 · KvK Den Haag 27230471 · Btw-nummer NL8000.78.378.B01 · info@vanderendegroep.nl · www.vanderendegroep.nl
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Solution
Check/replace all breakers
Reset thermal protection
Check/replace power cord and plug
Open relief valve to let air out, then close
Shut relief valve
Water reservoir level too low or empty.
Check low-water float.
Make sure the inlet pressure pump is on.
Check the filter for contamination.
Check the inlet pressure protection.
Control inlet/suction pipe, inlet pressure pump or
reservoir
Contact supplier
Contact supplier
Clean filter
Replace hose
Contact supplier
Check hoses/couplings
Contact supplier
Check suction connection for cracks and/or holes
Check couplings and bolts
Otherwise, contact supplier
Check hoses and hose clamps, tighten or replace
as necessary
Contact supplier
Contact supplier
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