STIEBEL ELTRON PEY 18/21/24 - Shutdown and Troubleshooting; Appliance Shutdown Procedure; Troubleshooting Guide

12 | PEY 18/21/24 www.stiebel-eltron.com
INSTALLATION
Shutdown
Appliance handover
 Explain the appliance function to users and familiarise them
with its operation.
 Make the user aware of potential dangers, especially the risk
of scalding.
 Hand over these instructions.
11.2 Recommissioning
Vent the appliance and the cold water inlet line (see chapter "Set-
tings").
See chapter "Commissioning".
12. Shutdown
 Isolate all poles of the appliance from the power supply.
 Drain the appliance (see chapter "Maintenance").
13. Troubleshooting
WARNING Electrocution
To test the appliance, it must be supplied with power.
Indication variants for diagnostic traffic light (LED)
Red Illuminates in the event of a fault
Yellow Illuminates during heating operation
Green Flashing: Appliance is connected to power supply
1
D0000041794
1 Diagnostic traffic light
Fault / LED diagnos-
tic light display
Cause Remedy
The flow rate is too low. The strainer in the appli-
ance is dirty.
Clean the strainer.
The set temperature is not
achieved.
One phase down. Check the fuse/MCB in
your fuse box/distribution
panel.
The heating system does
not switch on.
Air has been detected in
the water and heating
output is briefly switched
off.
The appliance restarts
after one minute.
No hot water and no traf-
fic light display.
The MCB/fuse has re-
sponded/blown.
Check the fuse/MCB in
your fuse box/distribution
panel.
Safety pressure limiter
AP3 has tripped.
Remove the cause of the
fault (e.g. faulty pressure
flush).
Protect the heating sys-
tem against overheating
by opening a draw-off
valve downstream of the
appliance 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 chapter
"Commissioning").
The PCB is faulty. Check the PCB and re-
place if required.
Traffic light display: Green
flashes or is constantly on
The PCB is faulty. Check the PCB and re-
place if required.
No hot water at a flow
rate
>3l/min.
The flow meter (DFE) is
not plugged in.
Plug the flow meter plug
back in.
The flow meter (DFE) is
faulty.
Check the flow meter and
replace if required.
Traffic light display: Yel-
low constantly on, green
flashing
The high limit safety
cut-out has responded or
suffered a lead break.
Check the high limit safety
cut-out and replace it if
required.
No hot water at a flow
rate
>3l/min.
The heating system is
faulty.
Check the heating system
resistor and replace if
required.
The PCB is faulty. Check the PCB and re-
place if required.
Traffic light display: Yel-
low constantly on, green
flashing
The outlet sensor is un-
plugged or the lead is
broken.
Plug in the outlet sensor
or replace if required.
Traffic light display: Red
constantly on, green
flashing
The cold water sensor is
faulty.
Check the PCB and re-
place if required.
No hot water
Required temperature
>45°C is not achieved.
The cold water inlet tem-
perature exceeds 45°C.
Reduce the cold water
inlet temperature to the
appliance.
Traffic light display: Red
constantly on, green
flashing
The outlet sensor is faulty
(short circuit).
Check the outlet sensor
and replace if required.
14. Maintenance
WARNING Electrocution
Before any work on the appliance, ensure omnipolar dis-
connection from the power supply.
Draining the appliance
The appliance can be drained for maintenance work.