Troubleshooting - STIEBEL ELTRON DHB-E 13 LCD AU Operation And Installation

INSTALLATION

Troubleshooting

15. Troubleshooting
WARNING Electrocution
To test the appliance, it must be connected to the power
supply.
Note
The diagnostic traffic light is displayed when water flows.
Indicator options for diagnostic traffic light (LED)
Red Illuminates in the event of a fault
Yellow Illuminates in heating mode/flashes when output restric-
tion reached
Green Flashing: Appliance connected to power supply
Diagnostic traffic Fault
light
No LED illuminates. The appliance does not heat
up.
Green flashes, yellow No DHW
off, red off
Green flashes, yellow The display is completely off. Loose set value transducer cable between PCB and
on, red off
Green flashes, yellow No DHW, the outlet temper-
on, red off ature does not match the set
value.
Green flashes, yellow No DHW, the outlet temper-
off, red on ature does not match the set
value.
16 | DHB-E LCD AU
Cause
There is no power supply.
The PCB is faulty.
The shower head / aerator are scaled up.
The strainer in the cold water inlet is dirty.
The flow meter is not plugged in.
The flow meter is faulty.
The PCB is faulty.
display.
The programming unit connecting cable is faulty.
The programming unit PCB is faulty.
The downstream tap is faulty.
Internal anti-scalding protection is activated.
The heating system is faulty.
The outlet detector is faulty.
The PCB is faulty.
Appliance is operating at its output limit.
The safety switch was not enabled during "Initial
start-up".
The safety switch has tripped.
The high limit safety cut-out has tripped.
The high limit safety cut-out is faulty.
Not all phases are connected to the appliance.
The NTC sensor is faulty.
The PCB is faulty.
Remedy
Check the fuse/MCB in your fuse box/distribution
board.
Replace the function module.
Descale or replace the shower head / aerator if nec-
essary.
Clean the strainer.
Reconnect the connecting cable on the PCB.
Replace the flow meter.
Replace the function module.
Check the set value transducer cable and plug the
cable into the programming unit and/or PCB.
Check the connecting cable and replace if required.
Check the programming unit and replace if required.
Replace the faulty tap.
Deactivate the internal anti-scalding protection.
Replace the function module.
Replace the outlet sensor.
Replace the function module.
Reduce the flow rate. Install the flow limiter.
Activate the safety switch by firmly pressing the reset
button.
Correct the cause (e.g. the high limit safety cut-out is
not connected, is faulty or has responded) and acti-
vate the safety switch.
Remedy the cause and activate the safety switch.
Replace the high limit safety cut-out and then acti-
vate the safety switch.
Check the fuses/MCBs.
Check the NTC, replace the sensor if necessary.
Replace the function module.
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