STIEBEL ELTRON LWZ 130 Bedienung Und Installation Seite 58

INSTALLATIoN
Troubleshooting
Cleaning the fans
You can clean the fans without disconnecting the cables leading
to the fans. Nevertheless, we recommend removing the control
panel cover. Then you can unplug the control cable and power
cable from the printed circuit board.
f Undo the screws securing the fans.
f Clean the fans with a soft brush.
Cleaning the preheater
In principle, the preheater does not need to be cleaned. Inade-
quate filter changing can cause dust to build up in the appliance.
In this case, the preheater does need to be cleaned.
Refitting the components
f Push the fan units back into the appliance.
f Reconnect the fan cables.
f Fit the control panel cover.
f Slide the cross-countercurrent heat exchanger back into the
appliance.
f Push the wedge back in again.
f Fit the condensate pan.
Cleaning the air ducts
Air ducts must be checked at regular intervals and cleaned if nec-
essary. Disconnect the air ducts from the appliance or carry out in-
spection and cleaning through the extract air and supply air vents.
58 | LWZ 130 | LWZ 130 Enthalpie
15. Troubleshooting
WARNING Electrocution
Disconnect the appliance from the power supply before
carrying out work inside the appliance.
f Disconnect the appliance from the power supply
and secure it against unauthorised reconnection.
Fault (Exxx)
xxx Fault Effect
--- No fault
present
8 No humidity The appliance cannot
value for the provide humidity pro-
extract air tection.
10 No temper- Bypass mode is not
ature value possible with extract air
for the ex- routing. Bypass mode
tract air can be manually enabled
with the option "Bypass/
window contact" in the
parameter "Operating
mode heat recovery by-
pass".
11 No temper- Bypass mode is not pos-
ature value sible with outdoor air
for the out- routing. Bypass mode
door air can be manually enabled
with the option "Bypass/
window contact" in the
parameter "Operating
mode heat recovery by-
pass".
16 The conden- The unit switches off the
sate float fans.
switch has
responded.
17 Outdoor air No control to the comfort
temperature temperature required for
sensor short passive houses of at least
circuit 16.5 °C in the supply air
18 Outdoor air No control to the comfort
temperature temperature required for
sensor lead passive houses of at least
break 16.5 °C in the supply air
101 Supply air The unit does not receive
fan any speed feedback from
the fan. There is no effect
on the flow rate control
mode.
102 Exhaust air The unit does not receive
fan any speed feedback from
the fan. There is no effect
on the flow rate control
mode.
105 Maximum The high limit safety cut-
outdoor air out may respond.
temperature
exceeded
201 No RTC Time-dependent program
communi- sequences are disrupted.
cation (RTC
= real-time
clock)
Remedy
Isolate the appliance from the
power supply. Check the sensor
cable. Replace the sensor.
Isolate the appliance from the
power supply. Check the sensor
cable.
Isolate the appliance from the
power supply. Check the sensor
cable.
Check the condensate drain.
Check the cable for breakages.
Isolate the appliance from the
power supply. Check the sensor
cable.
Isolate the appliance from the
power supply. Check the sensor
cable.
Isolate the appliance from the
power supply. Check the cabling.
Check the PWM control signal
that the electronic assembly
sends to the fan. Check the speed
signal that the fan sends to the
electronic assembly. Replace
the fan.
Isolate the appliance from the
power supply. Check the cabling.
Check the PWM control signal
that the electronic assembly
sends to the fan. Check the speed
signal that the fan sends to the
electronic assembly. Replace
the fan.
Isolate the appliance from the
power supply. Check the air flow
rate. Check the triac for continui-
ty. Check the sensor cable.
Isolate the appliance from the
power supply. Replace the elec-
tronic assembly.
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