Service Information; Troubleshooting - STIEBEL ELTRON DHB-E 11/13 LCD Operation And Installation Manual

INSTALLATIoN
Service
-
information
14.
Service information
Overview of connections
1 Flow sensor
2 High limit safety cut-out, automatic reset
3 NTC sensor
4 Pin strips for connected load and anti- scalding protection
5 Programming unit plug-in position
6 Diagnostic traffic light
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.
Diagnostic traffic
lights ( draw- off mode)
No LED illuminates Appliance does not heat up
Fault
Green flashing, yellow off,
red off
Appliance cover retainer
Indicator options for diagnostic traffic light ( LED)
• 00
Red Illuminates in the event of a fault
000
Yellow Illuminates in heating mode/flashes when output restric-
tion reached
000
Green Flashing: Appliance connected to power supply
Cause
One or more mains power phases missing
Faulty PCB
No DHW Appliance starting flow rate not reached; shower
Green flashing, yellow on, No display
red off
Green flashing, yellow on,
red off does not match set value
head/aerator scaled up
Appliance starting flow rate not reached; strainer Cleaning the strainer
in cold water inlet dirty
Flow meter not attached
Remedy
Check fuses/MCBs in distribution board
Replacing the function module
Descale/replace the shower head/aerator
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
No DHW; outlet temperature Tap faulty
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
Faulty outlet sensor
Heating system faulty
Faulty PCB
Green flashing, yellow flash- No DHW; outlet temperature Appliance is operating at its output limit
ing, red off does not match set value
Replace the outlet sensor
Replacing the function module
Replacing the function module
Reduce flow rate; install flow limiter
Appliance is operating at its output limit
Heating system faulty
Check jumper position for connected load
Replacing the function module
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