STIEBEL ELTRON LWZ 404 SOL Installation Manual

ENGLISH
www.stiebel-eltron.com LWZ304-404 SOL | 41
INSTALLATION
Troubleshooting
9.3 Circulation pump
If the circulation pump detects air in the heating circuit, it stops.
Reset the heating circuit pump by switching off the control voltage
for at least 30seconds.
9.4 Fault messages in the programming unit
If there is a fault in the system, a fault message appears on the
display. There is a fault memory so you can check earlier faults.
This is found under "MENU/ CONTRACTOR/ FAULT SEARCH". The
programming unit shows the ten most recent faults.
Some fault messages prompt you to press the reset button.
1
26_04_01_0647
1 Electronics reset button
D0000039376
1
1 Reset button for high limit safety cut-out
No. Fault Appliance response Cause Remedy
01 Anode The anode has either been consumed
or the connection cable is faulty.
Notify your qualified contractor.
02 The high limit safety
cut-out has tripped
The electric emergency/booster
heater has overheated and was
therefore stopped by the high
limit safety cut-out.
The external filter on the return is
contaminated.
Clean the filter.
The pump has seized. Ensure its function or replace the pump.
The flow rate through the heat pump
is too low, for example if the ther-
mostatic valves on all the radiators
or the zone valves in the underfloor
heating system are closed.
If you add the flow rate to “Favourites”, you can easily monitor
it. If all valves are closed, this indicates that a heating curve has
been set too high. Match the heating curve in accordance with
the description in chapter “Heating/Heating curve”.
This fault may also occur if the power
supply utility shuts down the electric
emergency/booster heater during a
power-off period and the parameter
"POWER-OFF" has been set incor-
rectly.
Ensure that the power-OFF contact has been connected cor-
rectly. Set parameter “POWER-OFF” in accordance with the
specification issued by the power supply utility (see chapter
“Settings/ Contractor level/ Power-OFF”). Press the electron-
ics reset button.
Press the high limit safety cut-out reset button. Press the
electronics reset button. Notify customer support if the fault
repeats.

STIEBEL ELTRON LWZ 404 SOL Specifications

General

Brand	STIEBEL ELTRON
Model	LWZ 404 SOL
Category	Fan
Language	English