Troubleshooting - Stiebel Eltron DHB-E 11/13 LCD Utilisation Et Installation

INSTALLATION

Troubleshooting

15. Troubleshooting
WARNING Electrocution
To test the appliance, it must be connected to the power
supply.
Note
When testing the appliance using the diagnostic traffic
lights, water must be flowing.
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
lights (draw-off mode)
No LED illuminates Appliance does not heat up One or more mains power phases missing
Green flashing, yellow off, No DHW
red off
Green flashing, yellow on, No display
red off
Green flashing, yellow on, No DHW; outlet temperature
red off does not match set value
Green flashing, yellow flash- No DHW; outlet temperature
ing, red off does not match set value
Green flashing, yellow off, No DHW; outlet temperature
red on does not match set value
40 | DHB-E LCD
Cause
Faulty PCB
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 attached
Flow meter faulty or dirty
Faulty PCB
Loose connecting cable between PCB and pro-
gramming unit
Faulty connecting cable between PCB and pro-
gramming unit
Programming unit faulty
Faulty PCB
Tap faulty
Faulty outlet sensor
Heating system faulty
Faulty PCB
Appliance is operating at its output limit
Appliance is operating at its output limit
Heating system faulty
One or more mains power phases missing
Air detection has responded
Safety switch not activated during "Commissioning" Activate safety switch by pressing the reset button
Safety switch triggered by high limit safety cut-out Check high limit safety cut-out (plug-in connection,
Safety switch responds again after high limit safety
cut-out has been checked; high limit safety cut-out
faulty
Safety switch responds again; PCB faulty
Short circuit in outlet sensor
Faulty PCB
Remedy
Check fuses/MCBs in distribution board
Replacing the function module
Descale/replace the shower head/aerator
Cleaning the strainer
Check plug-in connection; correct if necessary
Replacing the flow meter
Replacing the function module
Check plug-in connections; correct if necessary
Check connecting cable; replace if necessary
Replacing the programming unit
Replacing the function module
Replace tap
Replace the outlet sensor
Replacing the function module
Replacing the function module
Reduce flow rate; install flow limiter
Check jumper position for connected load
Replacing the function module
Check fuses/MCBs in distribution board
Continue draw-off for >1 min
firmly
connecting cable); activate safety switch
Replace high limit safety cut-out; activate safety
switch and draw off water at the maximum set
value for >1 min
Replacing the function module
Check outlet sensor; replace if necessary
Replacing the function module
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