STIEBEL ELTRON LWZ 404 SOL Installation Manual

44 | LWZ304-404 SOL www.stiebel-eltron.com
INSTALLATION
Troubleshooting
No. Fault Appliance response Cause Remedy
32 EEProm Press the electronics reset button. If this faults occurs repeat-
edly, notify customer support. Replace the control unit.
33 Extract air humidity
sensor
The actual values captured by a
humidity sensor are continuously
outside the permissible range for a
defined period.
Press the electronics reset button. If this faults occurs repeat-
edly, notify customer support.
34 Flow sensor Press the electronics reset button. If this faults occurs repeat-
edly, notify customer support.
35 Min. flow, cooling The inlet pressure of the refrig-
erant lies below the threshold
value during cooling. The
compressor will be blocked. If
the temperature rises, the com-
pressor will start after an idle
period.
Select a higher pump speed.
36 Min. flow rate For 2 hours the flow rate has
been <5l/min.The electric
emergency/booster heater will
be blocked. Only frost protection
remains effective.
Select a higher pump speed. Open the heating circuits. Balance
the heating circuits. Isolate the appliance across all poles from
the mains power for approx. one minute. If the pump repeated-
ly fails to start, inform customer support.
37 Min. water pressure The overpressure is less than
0.05MPa (0.5bar). At the same
time, the minimum flow rate has
not been achieved. The electric
emergency/booster heater will
be blocked.
This fault may occur following vent-
ing or due to leaks.
Top up with water.
40 Float switch, bottom
panel
The heat pump and the ventila-
tion are switched off.
The cause is the defrost pan over-
flowing or leaks in the heating or
DHW circuit of the appliance. This
fault may reset automatically.
Check for leaks. Check the float switch is working correctly.
50 Sensor on heat
pump return
Control of the appliance con-
tinues despite this fault. The
amount of solar heat and
compressor heat cannot be cal-
culated.
The measured sensor values have
been outside the permissible range
for a specified period.
Press the electronics reset button for one second. If this faults
occurs repeatedly, notify customer support. Replace the sensor.
51 Sensor on heat
pump flow
Control of the appliance con-
tinues despite this fault. The
amount of compressor heat and
the output of the electric emer-
gency/booster heater cannot be
calculated.
The measured sensor values have
been outside the permissible range
for a specified period.
Press the electronics reset button for one second. If this faults
occurs repeatedly, notify customer support. Replace the sensor.
52 Sensor on condenser
outlet
Control of the appliance contin-
ues despite this fault.
The measured sensor values have
been outside the permissible range
for a specified period.
Press the electronics reset button for one second. If this faults
occurs repeatedly, notify customer support. Replace the sensor.

STIEBEL ELTRON LWZ 404 SOL Specifications

General

Brand	STIEBEL ELTRON
Model	LWZ 404 SOL
Category	Fan
Language	English