Wilo Control MS-L 2x4kW Series - Maintenance and Repair; Maintenance Intervals and Work; Repair Work; Troubleshooting and Possible Solutions

40 WILOSE04-2015V05DINA4
English MAINTENANCE AND REPAIR
waste disposal authorities, or the supplier from
whom the product was purchased.
9. Maintenance and repair
POTENTIALLY fatal danger due to electrical
voltage!
There is arisk of fatal electric shocks oc-
curring when performing work on the open
switchgear. During all work, the switchgear
must be disconnected from the electricity
network and secured against reactivation
without permission. Allelectrical work must
be carried out by aqualied 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 author-
ised service centres.
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 the switchgear
Yearly
• Visual inspection of individual components
9.2. Maintenance work
Prior to maintenance work, the switchgear must
beswitchedoffasdescribedunder"Temporary
shutdown".Maintenanceworkmayonlybecar-
riedoutbyqualiedpersons.
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
byaqualiedelectricianorWiloCustomerService
(e.g.meltingofprotectivecontacts,deformation
of plastic parts).
Ifseverewearisidentied,havetheaffected
componentsreplacedbyaspecialistelectricianor
Wilo Customer Service.
9.3. Repair work
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! Such work may only be carried out by
aqualied 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.
Onlyperformthisworkifsuitablyqualied
personnel are available. Electrical work must be
carriedoutbyqualiedelectriciansforinstance.
We recommend always having this work carried
out by Wilo Customer Service.
Unsanctionedmodicationstotheswitchgearare
made at the operator's own risk and release the
manufacturer from any warranty obligations.
10.1. Acknowledging faults
Afterafaultoccurs,avisualandaudiblewarningis
output.
BybrieypressingtheBuzzerOFF/resetbutton,
the audible alarm is deactivated and collective fault
signal relay (SSM) acknowledged.
When held down for longer (min. 1 sec), the fault is
acknowledged and the control is reenabled.
A fault can only acknowledged once it has been
eliminated!
10.2. Fault signals
LED lights up yellow
Cause:Thesetserviceintervalhasexpired
Solution:Performmaintenanceontheunitandhave
the counter reset by Wilo Customer Service
LED ashes yellow
Cause:Themonitoredoperatingparametershave
beenexceeded
Solution:Checkthesettingsontheunitandhave
the counter reset by Wilo Customer Service
LED lights up red
Cause:permittedratedcurrenthasbeenexceeded,
excesscurrentreleasehasbeeninitiated
Solution: Check pump and setting of DIP switch 1
LED ashes red
Cause:Ratedcurrentbelow300mAduringopera-
tion or phase L2 missing
Solution: Check mains connection of switchgear
and pump connection