
© by WilTec Wildanger Technik GmbH
Item 50588 and others
Page 6
09 2021
-1
Cleaning
The heating oil pump must be cleaned only by using mild cleaning agents as well as a damp cloth and
soapy water. Damage caused by inappropriate cleaning agents is not covered by warranty.
Maintenance
Attention!
Before every maintenance work the pump must be switched off, pull out the plug from
the power socket.
•
The pump is maintenance free. However, for a long operation life, we recommend regular
checking and servicing.
•
After long non-operation periods, check if the rotor turns properly.
Troubleshooting
Engine does not run
Causes
Solutions
No supply power (voltage).
Check voltage.
Pump impeller blocked
– thermo controller has
is deactivated pump
Disassemble and clean pump.
Engine not running
Consult a professional electrician.
Pump does not suck in
Cause
Corrections of malfunctions
Suction valve not inside the pumped medium
Bring the suction valve in the pumped medium.
Pump room without pump medium
Fill in pump medium in suction nozzle.
Air in suction line
Check if suction line is well sealed.
Suction valve untight
Clean suction valve.
Suction strainer/valve blocked
Clean suction strainer.
Max. suction lift exceeded
Check suction lift.
Insufficient flow rate
Cause
Corrections of malfunctions
Suction lift too high
Check suction lift.
Suction strainer is dirty
Clean suction strainer.
Level of pumped medium drops rapidly
Place suction valve more deeply.
Pump capacity reduced because of harmful
substances
Clean pump and replace wearing parts.
Thermo switch shuts down pump
Cause
Corrections of malfunctions
Engine overloaded
– excessive friction through
foreign particles
Disassemble and clean pump, prevent suction
of foreign particles (filter).
Attention!
The pump must not run dry.