STIEBEL ELTRON PER 18/21/24 - Troubleshooting and Faults; Customer Service Mode; Fault Menu Codes; Control and Data Menus

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ENGLISH
INSTALLATION
Troubleshooting
13. Troubleshooting
WARNING Electrocution
To test the appliance, it must be supplied with power.
Fault Cause Remedy
The flow rate is too
low.
Strainer and/or aera-
tor are dirty
Clean the strainer and/or aerator.
The motorised valve
is faulty.
Check the motorised valve. Replace
it if required.
Permanent error dis-
play on the program-
ming unit
The sensor/PCB is
faulty.
Further analyse the fault in cus-
tomer service mode (see chapter
"Customer service mode").
Communication be-
tween the program-
ming unit and the
control unit is faulty.
Check the programming unit and
the connecting cable.
The background
lighting in the pro-
gramming unit is
completely off.
No mains power Check the fuses/MCBs in your fuse
box/distribution panel.
Loose connecting
cable to the program-
ming unit
Reconnect the cable.
Safety pressure limit-
er has triggered.
Remove the cause.
Open a downstream draw-off valve
for 1minute. This depressurises
and cools down the heating sys-
tem, protecting it against over-
heating.
Activate the safety pressure limiter
at flow pressure by pressing the
reset button.
Faulty PCB. Check the PCB and replace if re-
quired.
Heater does not
switch on / no hot
water.
Heater is faulty. Check the heater and replace it if
required.
Flow meter faulty or
not plugged in.
Check the connection.
Check the flow meter in the cus-
tomer service mode.
The high limit safety
cut-out has respond-
ed or suffered a lead
break.
Remove the cause.
Activate the high limit safety cut-
out, replace the high limit safety
cut-out if required.
Error display only ap-
pears when water is
being drawn off.
One phase has
dropped out.
Check the fuses/MCBs in your fuse
box/distribution panel.
Inlet temperature
>45°C.
See chapter "Water installation";
limit inlet temperature if neces-
sary.
Intermittent cold
water.
Wellness function
enabled.
Disable the Wellness function.
Brief drop in flow rate The appliance restarts automati-
cally when an adequate flow rate
has been detected.
Air detector responds
(cold water for ap-
prox.1min).
The appliance restarts automati-
cally after a delay.
13.1 Customer service mode
Activate/deactivate customer service mode with the SERVICE button
on the back of the user interface (connection to "T-set" must be
present). Use the ECO button to move to the next menu item (see
chapter "Settings/ Settings in the INFO menu").
Scroll through the respective submenu by turning the temperature
selector.
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26�02�02�0920
13.1.1 Fault menu
This menu is only shown if there is a fault.
Code Meaning
E1, ELEC The electronic assembly is faulty.
Replace the electronic assembly.
E 3, ntc Check the electrical connection to the outlet sensor. Replace it if
required.
E 4, mot Check the electrical connection to the motorised valve. Replace
it if required.
13.1.2 Control menu
Code Meaning
C 1, 36.5°C Display of the current inlet temperature. If the cold water sensor
is faulty, a temperature of 1.0°C is displayed.
C 2, 47.5°C Display of the current outlet temperature. If the cold water sen-
sor is faulty, a temperature of 65.0°C is displayed.
C 3, 6.8 l/min Display of the current flow rate.
C 4, 21.5kW Display of the current power consumption.
13.1.3 Data menu
Code Meaning
d 1, 8042 Service code for customer support
d 2, 2341 Number of days, on which the appliance is connected to the
power supply.
d 3, 172h Heating time in hours.
d 4, 24kW Maximum output in kW: This output may deviate from the rated
output, e.g. if the mains voltage is not 400V.