STIEBEL ELTRON HDB-E 11/13 Trend - 14 Service Information; 15 Troubleshooting

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Service information
14. Service information
Overview of connections
3
4
1 Flow sensor
2 High limit safety cut-out, automatic reset
3 Pin strips for connected load and temperature
4 Diagnostic traffic light
Appliance cover retainer
15. Troubleshooting
WARNING Electrocution
To test the appliance, it must be connected to the power
supply.
Notice
When testing the appliance using the diagnostic traffic
light, water must be flowing.
Signals of the diagnostic traffic light ( LED)
• O O
OSO
red Lights up in the event of a fault
yellow Lights up in heating mode/flashes when output limit
reached
00e1
green Flashing: Appliance connected to power supply
Diagnostic
traffic light
(draw- off
mode)
Fault
Cause Remedy
No LED lights up Appliance does not One or more mains Check the fuses in
heat up power supply the distribution
phases are missing board
PCB faulty Replace the func-
tion module
Green flashing, No DHW
yellow off,
red off
Appliance start-
ing flow rate not
reached; shower
head/aerator
scaled up
Appliance start- Clean the strainer
ing flow rate not
reached; strainer
in cold water inlet
dirty
Flow meter not
plugged in
Descale/replace
the shower head/
aerator
Check plug-in con-
nection; correct if
necessary
Flow meter faulty Replacing the flow
or dirty meter
PCB faulty Replace the func-
tion module
Green flashing, No DHW; outlet Tap faulty
yellow on, temperature does
red off not match set value
Replace tap
Heating system
faulty
PCB faulty
Green flashing, No DHW; outlet Appliance at its
yellow flashing, temperature does output limit
red off not match set value
Green flashing,
yellow off,
red on
No DHW; outlet
temperature does
not match set value
Replace the func-
tion module
Replace the func-
tion module
Reduce flow rate;
install flow limiter
Appliance at its
output limit
Heating system
faulty
One or more mains
power supply
phases are missing
Air detection has
responded
Safety switch not
activated during
"Commissioning"
Check jumper posi-
tion for connected
load
Replace the func-
tion module
Check the fuses in
the distribution
board
Continue drawing
water for > 1 min
Activate the safety
switch by firmly
pressing the reset
button
Safety switch was Check high limit
triggered by high safety cut-out
limit safety cut-out ( plug-in connec-
tion, connecting
cable); activate
safety switch
Safety switch re-
sponds again after
high limit safety
cut-out has been
checked; high
limit safety cut-out
faulty
Safety switch re- Replace the func-
sponds again; PCB tion module
faulty
PCB faulty
Replace high limit
safety cut-out; ac-
tivate safety switch
and draw off water
at the maximum
set value for > 1 min
Replace the func-
tion module
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