102
Appliance cover retainer
D0000056216
16. Troubleshooting
WARNING Electrocution
To test the appliance, it must be supplied with power.
Note
The diagnostic traffic light is displayed when water flows.
Red Illuminates in the event of a fault
Yellow Illuminates in heating mode/flashes when output limit reached
Green Flashing: Appliance connected to power supply
No LED illuminates. The appliance does not heat
up.
There is no power supply. Check the fuse/MCB in your fuse box/distribution
board.
The PCB is faulty. Replace the test assembly.
Green flashing, yellow
off, red off
No DHW
The shower head/aerator are scaled up. Descale or replace the shower head/aerator if nec-
essary.
The strainer in the cold water inlet is dirty. Clean the strainer.
The flow meter is not plugged in. Reconnect the connecting cable on the PCB.
The flow meter is faulty. Replace the flow meter.
The PCB is faulty. Replace the test assembly.
Green flashing, yellow
on, red off
The display is completely off.
Loose set value transducer between PCB and display. Check the set value transducer cable and plug the
cable into the programming unit and/or PCB.
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