Troubleshooting Guide - Interpump Group VHT Serie Instrucciones De Uso

8 - TROUBLESHOOTING GUIDE

• The pump is not primed and is operating dry, without lubricant
At start-up, the
• The water supply is off.
pump makes
• The valves are blocked.
no noise
• The delivery line is closed and does not let the air flow out of the pump.
• There is insufficient air suction and/or supply.
• Bends, elbows, fittings on the feed line are slowing down the flow of the liquid.
The pipes • The feed filter is dirty or too small.
pulsate in • The booster pump, if installed, is providing an insufficient pressure and/or capacity.
an irregular • The pump is not primed due to an insufficient head, the delivery pipe closing during
fashion. priming and/or a valve sticking
.• Worn pressure valves and/or seals and/or transmission problems.
• The pressure regulating valves are not working properly.
The pump
• There is an insufficient supply and/or the number of revolutions is less than the
does not give
rated value.
the rated
• Excessive leaking from the pressure regulating valve and/or the pressure seals.
capacity
• Worn valves.
and makes
• Cavitation due to undersized feed pipes and/or filter, insufficient capacity, high water
excessive
temperature, clogged filter.
noise.
The pressure
• The appliance (nozzle) is too large or is worn.
supplied by
• Excessive leaking from the pressure seals.
the pump is
• The pressure regulating valve is not working properly and/or the valves are worn.
insufficient.
• The pressure and/or the number of revolutions is higher than the rated value.
The pump • The oil in the sump of the pump is not at the required level or is not of the
overheats: recommended type.
• The belt is too tight, the joint or the transmission is not aligned.
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The information given in this document may be modified at any time without notice.
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