InstallationandoperatinginstructionsWilo-EasyControlMS-L1x4kW 37
MAINTENANCE AND REPAIR English
5. Switch off the entire unit so it is voltage-free and
secure it against accidental activation.
6. If the terminal for the collective fault signal is oc-
cupied,theexternalvoltagesourcepresentthere
must also be switched so it is voltage-free.
7. Disconnect all power supply cables and pull these
out of the threaded cable connections.
8. Connect the ends of the power supply cables so
that no moisture can enter into the cable.
9. Dismount the switchgear by undoing the screws
on the substructure.
8.3.1. Return delivery / storage
For shipping purposes, the switchgear must be
packaged so it is protected against knocks and
waterproof.
Please also refer to the “Transport and storage”
section.
8.4. Disposal
Proper disposal of this product avoids damage to
the environment and risks to personal health.
• Use the services of public or private waste dis-
posal companies, or consult them for the disposal
of the product or parts thereof.
• More information about proper disposal can be
obtained from the urban administration, the
waste disposal authorities or from the supplier
from whom the product was purchased.
9. Maintenance and repair
POTENTIALLY fatal danger due to electrical
voltage
When performing work on the uncovered
switchgear, there is a risk of fatal electric
shocks occurring. During all work, the switch-
gear must be disconnected from the electric-
ity network and secured against reactivation
without permission. All electrical work must
be carried out by a qualied electrician.
After completing maintenance or repair work,
the switchgear must be connected according to
the “Installation” section and activated as under
"Commissioning".
Maintenance or repair work and/or con-
structional changes that are not listed in this
operating and maintenance manual may only be
carried out by the manufacturer or by autho-
rized service centers.
9.1. Maintenance intervals
To ensure reliable operation, various maintenance
tasks must be carried out regularly.
NOTE
When used in sewage lifting units inside build-
ings or on land plots, the maintenance intervals
andworkshowninDINEN12056-4mustbe
adhered to.
Before initial commissioning or after a longer
period of storage:
• Clean the switchgear
Yearly
• Visual inspection of individual components
9.2. Maintenance tasks
Prior to maintenance work, the switchgear must
be switched off as described under "Temporary
shutdown". Maintenance work may only be car-
riedoutbyqualiedpersons.
9.2.1. Clean the switchgear
Use a damp cotton cloth to clean the switchgear.
Do not use any aggressive or scouring cleaners
or uids!
9.2.2. Visual inspection of individual components
Have the individual components checked for wear
byaqualiedelectricianorWiloCustomerService
(e.g. melting of protective contacts, deformation
of plastic parts).
If more serious wear is ascertained, have the
affected components replaced by a specialist
electrician or Wilo Customer Service.
9.3. Repairs
Prior to repair work, the switchgear must be
switched off as described under "Final shutdown"
and all power supply cables dismantled. Repair
work must be carried out by an authorized service
center or Wilo Customer Service.
10. Troubleshooting and possible solutions
DANGER due to electrical voltage
Improper procedures during electrical work
may result in fatal injuries caused by electrical
voltage! Such work may only be carried out by
a qualied electrician.
Potential faults are indicated visually and audibly.
According to the fault shown, the connected
pump or signal transmitter must be checked for
correct operation and replaced if necessary.
Onlyperformthisworkifsuitablyqualied
personnel are available. Electrical work must be
carriedoutbyqualiedelectriciansforinstance.
We recommend always having this work carried
out by Wilo Customer Service.
Unsanctionedmodicationstotheswitchgearare
made at the operator's own risk and release the
manufacturer from any warranty obligations.
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