INSTALLATION
Maintenance
Diagnostic traffic
lights (draw-off mode)
Fault
Cause
Remedy
Green flashing, yellow off,
red on
No DHW; outlet temperature
does not match set value
One or more mains power phases missing
Air detection has responded
Safety switch not activated during "Commissioning"
Safety switch triggered by high limit safety cut-out
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
Check fuses/MCBs in distribution board
Continue draw-off for >1 min
Activate safety switch by pressing the reset button
firmly
Check high limit safety cut-out (plug-in connection,
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
16. Maintenance
WARNING Electrocution
Before any work on the appliance, disconnect all poles
from the power supply.
This appliance contains capacitors which are discharged
when disconnected from the power supply. The capacitor
discharge voltage may briefly exceed 60 V DC.
Draining the appliance
The appliance can be drained for maintenance work.
A
WARNING Burns
/—\
Hot water may escape when you drain the appliance.
► Close the 3-way ball shut-off valve or the shut-off valve in the
cold water supply line.
► Open all draw-off valves.
► Undo the pipe connections from the appliance.
► Store the dismantled appliance in a room free from the risk
of frost, as water residues remaining inside the appliance can
freeze and cause damage.
Cleaning the strainer
If dirty, clean the strainer in the threaded cold water fitting. Close
the 3-way ball shut-off valve or the shut-off valve in the cold water
supply line before removing, cleaning and refitting the strainer.
17. Specification
17.1 Dimensions and connections
DHB-E LCD
b02 Entry electrical cables I Installation on unfinished walls
_
cOl Cold water inlet
_
Male thread
_
G
1/2 A
c06 OHW outlet Male thread
G
1/2 A
www.stiebel-eltron.com
DHB-E LCD I 41
ENGLISH
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