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HLP-Pump Faultfinding list
Important: Always disconnect the pump from mains, before attempting any repairs
.
Repairs on electrical components only to be carried out by qualified personnel.
Symptom
Cause
Action
Pump does not
start
No power
Check plug, lead, socket, fuse
3 stage switch in neutral
Move switch to desired stage
Capacitor faulty
Replace
Lead, plug, fuse faulty
Replace
Thermo switch in stator faulty
Replace
Pump impeller
rotates but
insufficient or no
water flow
Pump installation faulty, non return
valve faulty
Repair, replace
Shut off valve in suction or pressure line
closed or faulty
Open / check for correct function
Foreign bodies in suction line or impeller Clean
Air pocket in suction line / pump
housing
Bleed, by starting and stopping the
pump several times. Increase water
level in filter sump
Suction line not sealed
Tighten all connections
Pump is noisy
Foreign bodies in pump housing,impeller Clean
Air bubbles in pumps water flow
Check suction line for leaks, check o-
rings-shut off valve in suction line
After stopping
pump does not
restart
The air / water mix witch siphons back
created air pockets in the pump housing
or piping
Bleed, start and Stop the pump several
time modify pipe system
Pump produces
air bubbles
Suction line not properly sealed
Check suction line for leak, tighten all
connections, replace O-rings
Water level in filter sump not high
enough
Increase water level
O-ring old
Replace O-ring
Pump stator is
heating up and
Stops
Insufficient water in sump
Correct water level
Air pockets in rotor housing. Causing
friction in the ceramic bearing
Allow the pump to cold down for about
30 min. start the pump close the shut
off valve in the pressure line, slacken
the silver plug in face of the stator and
allow the air to escape, frighten the plug
open the shut off valve. If required
repeat until all air is removing and pump
runs normal
Pump operates
with increased
temperature
Lime scale deposits in rotor / pump
housing
Remove Pump, close suction side
opening, fill pump with lime scale
remover. After the gas bubbles have
stopped to appear at the pumps
pressure side, drain the pump housing
and clean with tap water. Please
observe all required safety measures
when using lime scale remover
