Nelson NW511D - Page 20

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NW511
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20
E.6
Waternotpumpedoutoftank
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Inspectthefiltersfordirtandcheckthatthedrain
hoseisnotblocked,bentorcrushed.
Checkthatthedrainpumpisnotblockedbydirtby
removingtheinsertonthesump(frominsidethe
tank)
Iftheproblempersists:
‐withtankempty:tankpressureswitchhasfailed
(continuousfullreading)
‐withtankfull:drainpumpfailure
If the system fails to pump out because the drain
pump is fouled (as a result of incorrect filter
positioning),proceedasfollows:
Bale out the warewasher with a basin and
disconnectitfromtheelectricalmains.
UnscrewthescrewA,releasethetangBandliftit.
Checkthattheimpellerofthedrainpump
underneaththecoverturnsfreely,andisfreefrom
dirt,limescaleresidues,orpiecesofglass.Neveruse
tools,screwdrivers,scissors,etc.
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E.7
Boilerheatingmalfunction(doesnot
heatup)
‐circuitboardrelayfailure
‐boilerheatingelementfaultyor"furred"with
limescale
‐boilertemperatureprobefaultyorincorrectly
positioned
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E.8
Tankheatingmalfunction(doesnot
heatup)
‐circuitboardrelayfailure
‐tankheatingelementfaultyor"furred"with
limescale
‐tanktemperatureprobefaultyorincorrectly
positioned
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E.9
Microprocessorfailure
Replacecircuitboard
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