Table of Contents
Advertisement
INSTALLATION
Troubleshooting
13. Troubleshooting
WARNING Electrocution
In order to check the appliance it must be connected to
the power supply.
13.1 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
13.2 Fault table
Fault / diagnostic traffic light LED
display
The appliance does not start.
Inadequate flow rate.
The set temperature is not achieved.
The heater switches off.
No hot water and no traffic light display.
Traffic light display: Green flashing
No hot water at flow rate > 3 l/min.
The set temperature is not achieved.
Traffic light display: Yellow constantly on;
green flashing
No hot water at flow rate > 3 l/min.
Traffic light display: yellow constantly on;
green flashing
Set temperature is not achieved.
Traffic light display: red constantly on; green
flashing
No hot water
Required temperature > 45 °C not achieved
14
| DHB-E AU
Cause
The shower head / aerators are scaled up.
The strainer in the appliance is dirty.
One phase down.
The air sensor detects the presence of air in the water
and briefly interrupts the heating output.
The MCB/fuse has responded/blown.
Safety pressure limiter AP 3 has tripped.
The PCB is faulty.
Flow sensor DFE is not plugged in.
Flow sensor DFE is faulty.
The set value transducer or connecting cable is faulty, or
the connecting cable is not attached.
Temperature limiting is activated.
The high limit safety cut-out has responded or its lead
is broken.
The heating system is faulty.
The PCB is faulty.
The outlet sensor is faulty.
Appliance is operating at its output limit.
The outlet sensor is faulty.
The cold water sensor is faulty.
The cold water inlet temperature exceeds 45 °C.
Remedy
Descale or if necessary replace the shower head / aera-
tors.
Clean the strainer.
Check the fuses/MCBs in your fuse box/distribution panel.
The appliance restarts after one minute.
Check the fuses/MCBs in your fuse box/distribution panel.
Remove the cause of the fault (e.g. faulty pressure wash-
er).
Protect the heating system against overheating by open-
ing a draw-off valve downstream from the appliance for
one minute. This depressurises and cools down the heat-
ing system.
Activate the safety pressure limiter at flow pressure by
pressing the reset button; see also chapter "Commission-
ing / Initial start-up".
Check the PCB and replace if necessary.
Plug the flow sensor plug back in.
Check the flow sensor and replace if necessary.
Attach the connecting cable; replace the set value trans-
ducer if required.
Disable temperature limiting.
Check the high limit safety cut-out and replace if neces-
sary.
Measure the resistance of the heater and replace if nec-
essary.
Check the PCB and replace if necessary.
Check the connection and replace the outlet sensor if
necessary.
Reduce the flow rate or install the flow limiter.
Check the connection and replace the outlet sensor if
necessary.
Check the PCB and replace if necessary.
Reduce the cold water inlet temperature to the appliance.
www.stiebel-eltron.com
Advertisement
Table of Contents
Troubleshooting
