Maintenance; Troubleshooting - Malmbergs SVQ250F Instruction Manual

MAINTENANCE

Before Use
Make sure there is no damage to cables or housing.
After Use
Clean the outside of the pump and run it for a while with clean water in a bucket/con-
tainer to clean the inside.
Storage
The pump must be stored in a frost-free place, since it might contain water which can
burst the pump when the water freezes.

TROUBLESHOOTING

All repairs must be performed by qualified persons. The device contains electrical compo-
nents that can only be repaired by a qualified electrician.
Problem Cause
The pump No power supply
will not
The motor is overheated
run
The residual current
device has tripped
The motor is faulty
The pump Suction opening is clogged
runs, but
The pump sucks air
delivers
no liquid
The pump is clogged
The pump Lifting head too high
gives in-
Pressure pipe diameter too
sufficient
small
water
Pressure pipe is clogged
Suction opening is clogged
The pressure pipe is bent
Pressure pipe leakage
Noisy The pump sucks air
pump
Pump Float body blocked
running
Switch set incorrectly
continu-
ously
Pump is Float body blocked
always
Water level too low
off
10
Action
Check cables, plugs, sockets and fuses
Check if the water temperature is too high or if
the pump is clogged. Eliminate the cause.
Reset the RCD. Contact a qualified electrician if
the RCD trips regularly.
Contact an authorised service representative
Clear the suction opening
Tilt the pump when it is submersed into the liq-
uid. Switch the pump on and off several times
to remove the air.
Clean the pump
Do not exceed the max. permitted head
Use a larger pressure pipe
Clear the pressure pipe
Clear the suction opening
Straighten out the pressure pipe
Seal the pressure pipe and all connections
Make sure the water level is adequate
Tilt the pump when it is submersed into the
liquid
Clean the float body
Adjust the switch correctly
Clean the float body