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Design and construction subject to change without prior notice!
No. Display text Note / possible cause Measures / remedial action
14
Heat lost through
open door!
• Door is open - heat energy is es-
caping
• Close door to prevent energy
loss
15 Abort heat recovery
• On/off key was pressed during
heat recovery
• Allow the heat recovery pro-
cess to run to completion
17
Empty
Close the door
• Door is open, thus preventing the
automatic emptying from continu-
ing
• Close the door
18
Water change
Close the door
• Door is open, thus preventing the
automatic water change from con-
tinuing
• Close the door
100 First fill error
• Reference level in tank not
reached in time during filling.
• Local water supply inadequate.
• Level detection defective
• Not possible to continue work-
ing
• Call a service technician!
101
Draining level not
reached
• Drainage sieve clogged
• Drain pump clogged/defective
• Level detection defective
• Check the drainage sieve,
clean if necessary
• Call a service technician if
needed
102
Safety level does
not drop below
level after time
• Drainage sieve clogged
• Drain pump clogged/defective
• Level detection defective
• There is a blockage
• Not possible to continue work-
ing
• Shut off local water supply
• Switch off the circuit breakers
• Call a service technician!
103
Tank temperature
not reached
• Tank set temperature is not
reached
• Temperature probe defective
• Heating defective
• I/O circuit board is defective
• Possible to continue working
• Call a service technician
104
Over-temperature
tank
• Maximum tank temperature ex-
ceeded
• Contactor / relay on I/O circuit
board is sticking
• Temperature sensor defective
• Plug-contact for temperature sen-
sor
high resistance
• Switch off the building-side
fuses
• Call a service technician!
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