STIEBEL ELTRON LWZ 130 Bedienung Und Installation Seite 62

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.
Undo the screws securing the fans.
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
Push the fan units back into the appliance.
Reconnect the fan cables.
Fit the control panel cover.
Slide the cross-countercurrent heat exchanger back into the
appliance.
Push the wedge back in again.
Fit the condensate pan.
Cleaning the air ducts
Air ducts must be checkedat regular intervals and cleaned if nec-
essary. Disconnectthe air ducts from the appliance or carry out in-
spection and cleaning through the extract air and supply air vents.
62 | I-WZ 130 | I-WZ 130 Enthalpie
15.
Fault (Exxx)
xxx
8
10
II
16
17
18
101
102 Exhaust air
105 Maximum
I I-WZ 130 E-W
Troubleshooting
WARNING Electrocution
Disconnect the appliance from the power supply before
carrying out work inside the appliance.
Disconnect the appliance from the power supply
and secure it against unauthorised reconnection.
WARNING Electrocution
4
The power cable must only be replaced (for example if
damaged) by a qualified contractor authorised by the
manufacturer, using an original spare part.
Fault Effect
- No fault
present
No humidity Theappliance cannot
value for the provide humidity pro-
extract air tection.
Bypass mode is not
No temper-
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".
No temper- Bypass mode is not pcs-
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".
The conden- The unit switches off the
fans.
sate float
switch has
responded.
Outdoor air No control to the comfort
temperature temperature required for
sensor short passive houses of at least
circuit 16.5oc in the supply air
Outdoor air No control to the comfort
temperature temperature required for
sensor lead passive houses of at least
break 16.5 oc in the supply air
Supply air The unit does not receive
fan any speed feedback from
the fan. There is no effect Checkthe PWMcontrol signal
on the flow rate control
mode.
The unit does not receive Isolate the appliance from the
fan any speed feedback from
the fan. There is no effect Checkthe PWMcontrol signal
on the flow rate control
mode.
The high limit safety cut- Isolate the appliance from the
outdoor air out may respond.
temperature
exceeded
Remedy
Isolatethe appliancefrom the
power supply. Checkthe sensor
cable. Replacethe 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. Checkthe sensor
cable.
Isolate the appliance from the
power supply. Check the sensor
cable.
Isolate the appliance from the
power supply. Check the cabling.
that the electronic assembly
sends to the fan. Checkthe speed
signal that the fan sends to the
electronic assembly. Replace
the fan.
power supply. Check the cabling.
that the electronic assembly
sends to the fan. Check the speed
signal that the fan sends to the
electronic assembly. Replace
the fan.
power supply. Check the air flow
rate. Check the triac for continui-
ty. Check the sensor cable.
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