Troubleshooting; For Contractors; Special Accessories; Environment And Recycling - STIEBEL ELTRON DHB-E 18 Si Operating And Installation Instructions

7. Troubleshooting

Fault / Diagnostic "traffi c light" display*
Flow rate too low
Heating does not switch on/no hot water
No hot water
No "traffic light" display
No hot water and flow rate > 3 l/min
"traffic light"
display: green flashing or constant
illumination
No hot water and flow rate > 3 l/min
"traffic light"
display: constant yellow indicationt
green flashing
No hot water
"traffic light"
display: red indication
green flashing
Table 6
* LED diagnostic
"traffi c light"

8. Special accessories

• Two-handle pressure valves
• Kitchen valve WKMD
Part no. 07 09 17
• Bath valve WBMD
Part no. 07 09 18
• Installation accessories
• Under-worktop set – unfi nished
walls
Best.-Nr. 07 05 65
Connections for finished walls, G 3/8",
top.
• Bausatz 2 Stück Wasser-Stopfen
G ½
Part no. 07 43 26
Required with third party pressure val-
ves ( P a).
Note: Not required for Stiebel Eltron
valves WKMD and WBMD.
• Installation set – fi nished walls
Part no. 07 40 19 ( Q a)
consisting of:
– 2x water plugs G½".
– 2x union nuts ½" with insert for sol-
dered fitting Ø 12 mm.
• Universal Montagerahmen
Part no. 22 02 91
consisting of:
– mounting frame with
– electrical wiring.
This set creates a gap of 30 mm bet-
ween the equipment back wall and
the installation wall. This enables the
electrical connection to be routed over
by the contractor
Cause
Shower head/percolators scaled up
Contamination
The air sensor senses the presence of air in the
water and briefly switches the heater off
MCB tripped/fuse blown
Safety pressure limiter AP 3 has tripped
Faulty PCB
One phase down
Faulty PCB
High limit safety cut-out (STB) tripped or cable
break
Heating system faulty
Faulty PCB
Cold water supply temperature > 35 °C
Flow rate > 25 l/min
Cold water sensor faultyt
red
yellow
green
unfinished walls at any point behind the
equipment. It increases the equipment
depth by 30 mm and reduces the pro-
tection level to IP 24 (splash-proof).
• Offset installation set – unfi nished
walls
Part no. 22 02 90
consisting of:
– universal mounting frame (see part
no. 22 02 91 for specification).
– pipe bends for installation at existing
gas water-heater connections (cold
water left and hot water right).
• Gas water-heater replacement set
Part no. 22 05 10
consisting of:
– universal mounting frame (see part
no. 22 02 91 for specification).
– pipe bends for installation at existing
gas water-heater connections (cold
water left and hot water right).
• Rohrbausatz DHB-Austausch
Part no. 15 98 76
consisting of:
– 2x plug-in water coupling.
Water connections in the instantaneous
water heater, suitable for existing DHB
plug-in water connections.
• Load circuit breaker LR 1-A
Part no. 00 17 86
Priority control of the DBH-E electronic
for imultaneous operation of e.g. electric
storage heaters.
For connection of the LR 11-A, see N .
Remedy
Descale and replace if necessary.
Clean strainer ( G 19).
Equipment starts again after a few seconds.
Check fuse/MCB (fuse box).
Remove the cause of fault (e.g. faulty pressure
washer). Press button on safety pressure limiter
( A 12), but only after isolating the equipment
from the electrical supply.
Test the PCB ( A 9), replace if necessary.
Check fuse/MCB (fuse box).
Test the PCB ( A 9), replace if necessary.
Check the high limit safety cut-out and replace if
necessary ( A 17).
Test the heating system resistance ( A 14) and
replace if necessary.
Test the PCB ( A 9), replace if necessary.
Reduce the temperature of the cold water sup-
ply to the equipment.
Reduce the flow rate to the equipment.
Test the PCB ( A 9), replace if necessary.
9. Environment and
recycling
Dispose of packing material and appliances
The dispose of the packing material and the
appliances must be done according to the lo-
cal recycling laws and regulations.

10. Guarantee

For guarantees please refer to the pespec-
tive terms and conditions of supply for your
country.
The installation, electrical connection
and fi rst operation of this appliance
should be carried out by a qualifi ed installer.
The company does not accept liability for
failure of any goods supplied which accor-
dance with the manufacturer's instructions.
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