STIEBEL ELTRON DEL 21 SL electronic LCD - Troubleshooting and Maintenance; Service Mode and Fault Diagnosis

ENGLISH
www.stiebel-eltron.com DEL SL electronic LCD | 35
INSTALLATION
Shutting down the system
Appliance handover
 Explain the appliance function to users and familiarise them
with its operation.
 Make users aware of potential dangers, especially the risk of
scalding.
 Hand over these instructions.
11.2 Recommissioning
See chapter "Settings and displays / Following an interruption to
the water supply"
12. Shutting down the system
 Isolate all poles of the appliance from the power supply.
 Drain the appliance (see chapter "Maintenance").
13. Troubleshooting
WARNING Electrocution
In order to check the appliance it must be connected to
the power supply.
13.1 Service mode
M1
Tmax
M2
D0000040982
1
2
1 Memory keys M1 and M2
2 Spanner symbol
The spanner symbol is displayed in the event of a fault or when
the appliance is in service mode.
 Activate customer service mode by pressing and holding
down both memory keys M1 and M2 for >6seconds.
 Disable customer service mode by briefly pressing one of the
three keys. Service mode is automatically terminated after
30seconds of inactivity.
Fault displays
--- No display, there is no fault
ntc Outlet sensor malfunction
ELE Faulty PCB
13.2 Indicator options for LED diagnostic traffic light
Indicator options
Red Illuminates in the event of a fault
Yellow Illuminates during heating mode
Green Flashing: Appliance is supplied with mains power
13.3 Fault table
LED diagnostic
traffic light
Fault Cause Remedy
No display No hot water. The fuse/MCB in the fuse box has blown/responded. Check the fuses/MCBs in your fuse box.
The safety pressure limiter has responded.
Remove the cause of the fault (e.g. faulty pressure
washer).
Protect the heating system against overheating by
opening a draw-off valve downstream of the appli-
ance for one minute. This depressurises and cools
down the heating system.
Activate the safety pressure limiter at flow pressure
by pressing the reset button; see also chapter "Ini-
tial start-up".
The PCB is faulty. Check the PCB, replace if required.
Flashing green
light
The appliance does not start.
Inadequate flow rate. Descale/ clean the connected aerator/ shower
head.
Inadequate flow rate. Clean the strainer in the water inlet.
No hot water at flow rate
>3l/min.
The flow sensor (DFE) plug has not been inserted. Plug the flow sensor plug back in.
The flow sensor (DFE) is faulty. Check the flow sensor and replace if required.