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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
and work shown in DIN EN 12056‐4 must be
adhered to.
Before initial commissioning or after a longer
period of storage
• Clean switchgear
Yearly
• Inspect contactor contacts for melting
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-
ried out by qualifi ed personnel.
9.2.1. Clean switchgear
Use a damp cotton cloth to clean the switchgear.
Do not use any aggressive or scouring cleaners
or fl uids!
9.2.2. Inspect contactor contacts for melting
Have the contacts checked for melting by a quali-
fi ed electrician or Wilo Customer Service.
If more serious combustion is ascertained, have
the affected contacts 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 authorised service
centre 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! This work may only be carried out by
a qualifi ed electrician.
Possible faults are displayed for 30 seconds on
the display using an alphanumeric code. Accord-
ing to the fault shown, the connected pump or
signal transmitter must be checked for correct
operation and replaced if necessary.
Only perform this work if suitably qualifi ed
personnel are available. Electrical work must be
carried out by qualifi ed electricians for instance.
We recommend always having this work carried
out by Wilo Customer Service.
Unsanctioned modifi cations to the switchgear are
made at the operator's own risk and release the
manufacturer from any warranty obligations.
40
TROUBLESHOOTING AND POSSIBLE SOLUTIONS
10.1. Fault indication
Overview of symbols:
E06
Error code
Error icon
Faults are displayed in various ways:
• When a fault occurs, the red collective fault signal
LED lights up and the collective fault signal is
activated. The error code is displayed for 30 s on
the display. Thereafter the error code can be read
from the fault memory.
• Faults that only lead to switching operations once
a set time has elapsed are indicated by a fl ashing
fault alarm LED. The error code is displayed for
30 s on the display. Thereafter the error code can
be read from the fault memory.
• Self-acknowledging faults such as dry run, high
water, etc. are displayed by a fl ashing fault signal
on the main screen and can be read in the fault
memory.
• A fault on one of the connected pumps is indicat-
ed on the main screen by a fl ashing status symbol
for the corresponding pump.
10.2. Fault acknowledgement
Acknowledgement of the individual errors is via
the menu.
Select menu 6.0.0.0.
Select menu 6.1.0.0 and press the operat-
ing knob --> the error symbol fl ashes.
Turn the operating knob once to the right.
The error symbol appears marked "reset"
and fl ashes.
Press the operating knob. All faults elimi-
nated are acknowledged and the fault LED
goes out.
If the fault LED continues to be lit or fl ashes, not
all errors have been eliminated. Check the indi-
vidual errors in the fault memory, eliminate these
and reacknowledge these faults.
10.3. Fault memory
The switchgear stores the last 16 errors in the
fault memory. The log uses the FiFo principle
(First in/First out).
1.
Select menu 6.0.0.0.
2.
Select menu 6.1.0.0.
3.
Select menu 6.1.0.1.
4.
The last fault appears.
5.
Turn the operating knob to the right. You will
then scroll through the fault memory (6.1.0.1 to
6.1.0.16).
WILO SE 08-2016 V05 DIN A4
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