Operating instructions Glass-, utensil- and dishwasher
M-iClean U
Operation/use
9763258
49 / 72
Design and construction subject to change without prior notice!
No.
Display text
Note/possible cause
Measures/remedial action
420
Max. conductivity
detection
faulty
• Cable breakage
• Plug connection to wiring
• Not possible to continue work-
ing
• Call a service technician!
421
Insufficient water in
holding tank
• Customer-connected water pressure
low
• Min. level not reached
• Filling valve defective
• Solenoid valve sieve blocked
• Open water inlet valve
• If necessary: call a service
technician
422
Max. level not
reached in holding
tank
• Max. electrode cable breakage
• Customer-connected water pressure
insufficient
• Solenoid valve sieve blocked
• Filling valve or filling valve flow reg-
ulator defective
• Supply hose kinked
• Open water inlet valve
• If necessary: call a service
technician
423
Water feed into
holding tank insuffi-
cient
• Customer-connected water pressure
insufficient
• Solenoid valve sieve blocked
• Filling valve defective
• Filling valve flow regulator defective
• Hose kinked
• GiO MODULE choke missing/defec-
tive
• Open water inlet valve
• If necessary: call a service
technician
425
No dip below min.
level in holding tank
• No dip below min. level
• Min. level electrode defective
• High pressure pump defective
• Pre-filter or concentrate line blocked
• Not possible to continue work-
ing
• Call a service technician!
426
Osmosis mem-
brane blocked/dirty
• Osmosis membrane blocked (pre-fil-
ter clogged or membrane blocked;
permeate recirculation valve not
opening)
• Permeate check valve faulty
• Possible to continue working
• Check pre-filter and replace if
necessary
• Call a service technician!
427
Conductivity input
not defined
• The necessary conductivity inputs
min. level and/or max. level not
available
• Not possible to continue work-
ing
• Call a service technician!
500
Energy optimisation
active
• Energy optimisation was externally
requested
• Restricted availability of heating per-
formance for machine
• Longer runtimes possible
• No action required
501
Energy optimisation
active
Tank temperature
not reached
• Set tank temperature not reached
• Temperature probe defective
• Heating defective
• I/O circuit board is defective
• Possible to continue working
• Call a service technician!
502
Energy optimisation
active
Wash time increase
in tank insufficient
• Tank heating defective
• Boiler heating defective
• Supply valve defective
• Possible to continue working
• If this error message reoccurs,
call a service technician