Stiebel Eltron DHE 18/21/24 Utilisation Et Installation page 95

INSTALLATIoN
Troubleshooting
Diagnostic traffic fault
lights (draw-off
mode)
No LED illuminates Appliance does not heat up
Green flashing, yellow No DHW
off, red off
Green flashing, yellow No display
on, red off
Green flashing, yellow No DHW; outlet temperature
on, red off does not match set value
Green flashes, yellow No DHW; outlet temperature
flashes, red off does not match set value
Green flashing, yellow No DHW
off, red on
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Cause
One or more power supply phases are missing
PCB faulty
Appliance starting flow rate not reached; shower
head/aerator scaled up
Appliance starting flow rate not reached; strainer in
cold water inlet dirty
Flow meter not plugged in
Flow meter faulty or dirty
PCB faulty
Loose connecting cable between PCB and program-
ming unit
Faulty connecting cable between PCB and program-
ming unit
Programming unit faulty
PCB faulty
Tap faulty
Outlet sensor faulty
Heating system faulty
PCB faulty
Motorised valve faulty
One or more power supply phases are missing
Air detection has responded
Remedy
Check the fuses in the distribution board
Replace the function module
Descale/replace the shower head/aerator
Clean strainer
Check plug-in connection; correct if necessary
Replace flow meter
Replace the function module
Check plug-in connections; correct if necessary
Check connecting cable; replace if necessary
Replace programming unit
Replace the function module
Replace tap
Replace outlet sensor
Replace the function module
Replace the function module
Replace motorised valve
Check the fuses in the distribution board
Continue draw-off for >1 min
DHE | 95