Laing DDC Series - Troubleshooting

13
Troubleshooting
− If the pump does not operate,
please check rst whether the
power supply is operating
correctly.
− If this does not resolve the
problem please unplug the
pump several times.
− If this still does not result in
the pump starting, it is
probably blocked by particles
or deposits in the system.
− Drain the system and remove
the pump.
− Open the pump by removing
the four housing screws at
the bottom.
− Remove the pump housing and
pull out the rotor.
− Clean the rotor and the stator
with a clean cloth and purge
all dirt from the pump housing.
− After reinserting the rotor into the stator perform a brief run test to make
sure that the rotor is spinning up. Caution: To avoid the introduction of
water into the electronics the pump should be completely dry before this
test is done.
− If the rotor is spinning in the above test, remove the o-ring from its seat
and clean it carefully.
− Re-insert the seal ring, place the pump housing on top of the motor and
screw it in place using the four screws.
− If the pump still won’t work or if the rotor does not run during the run test
the pump needs to be replaced.
Pump
housing
Rotor
Seal ring
Stator
Housing
screws
GB
Installation and instruction manual Laing DDC pumps
www.laing.de/eng/