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