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Important: Always disconnect the pump from mains, before attempting any repairs.
Repairs on electrical components only to be carried out by qualified personnel.
Symptom
Pump does not
start
Pump impeller
rotates but
insufficient or no
water flow
Pump is noisy
After stopping
pump does not
restart
Pump produces
air bubbles
Pump stator is
heating up and
Stops
Pump operates
with increased
temperature
HLP-Pump Faultfinding list
Cause
No power
3 stage switch in neutral
Capacitor faulty
Lead, plug, fuse faulty
Thermo switch in stator faulty
Pump installation faulty, non return
valve faulty
Shut off valve in suction or pressure line
closed or faulty
Foreign bodies in suction line or impeller Clean
Air pocket in suction line / pump
housing
Suction line not sealed
Foreign bodies in pump housing,impeller Clean
Air bubbles in pumps water flow
The air / water mix witch siphons back
created air pockets in the pump housing
or piping
Suction line not properly sealed
Water level in filter sump not high
enough
O-ring old
Insufficient water in sump
Air pockets in rotor housing. Causing
friction in the ceramic bearing
Lime scale deposits in rotor / pump
housing
Action
Check plug, lead, socket, fuse
Move switch to desired stage
Replace
Replace
Replace
Repair, replace
Open / check for correct function
Bleed, by starting and stopping the
pump several times. Increase water
level in filter sump
Tighten all connections
Check suction line for leaks, check o-
rings-shut off valve in suction line
Bleed, start and Stop the pump several
time modify pipe system
Check suction line for leak, tighten all
connections, replace O-rings
Increase water level
Replace O-ring
Correct water level
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
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
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