Recommissioning; Shutting Down The System; Temporary Shutdown; Shutting Down The System For A Prolonged Period - Stiebel Eltron LWE 40 Installation

INsTALLATIoN

shutting down the system

6.1.3 Switching on the power supply
f Switch on the power supply to the appliance via the fuse/
MCB in the distribution board.
Display during appliance start-up
All indicators on the programming unit light up for a few seconds.
Of the indicators on the left, a further indicator goes off every
two seconds.
All indicators flash at the frequency of the connected system.
Indicator Control unit
flashes x
times
1 LTM AC 200-50
2 LTM AC 1230
3 LTM TL 1230 LA 11
4 ZLWE 40-2, ZLWE 40-4, ZLWE 40-8, ZTDL 40-2, ZTDL 40-4,
ZLWE 40-8
5 VLR 70 CU, VLR 100 CU
6.1.4 Pairing the control unit
First, you need to select the number of appliances connected to
the control unit. This produces a balanced flow rate between the
extract air and the supply air.
f Press and hold down the 4 buttons on the programming unit
simultaneously for more than 5 seconds until the two operat-
ing mode indicators flash.
display No. of units
2 3
III
II
I
Filter
f Set the number of connected appliances using the "UP" and
"DOWN" buttons.
f Press the "Differential mode" and "Cross-ventilation" buttons
simultaneously for at least 3 seconds.
f All programming unit indicators light up briefly. The ap-
pliances and the programming unit are then ready for
operation.
f Check the appliance functions.
6.2

Recommissioning

f Open the internal panel.
f If the fan unit has been removed and the wall mount casing
is filled with insulation material, remove the insulation mate-
rial. Insert the fan unit.
36 | LWE 40
4 5 6 7
7. Shutting down the system
7.1

Temporary shutdown

f Switch off the power supply to the appliance via the fuse/
MCB in the distribution board.
f Close the internal panel to avoid heat losses.
7.2 Shutting down the system for a prolonged
period
f Remove the internal panel.
f Pull the fan unit out of the wall mount casing.
f Fill the wall mount casing with insulation material. This
makes it easier to install a new appliance later on.
f Close the internal panel.
8.

Troubleshooting

"fault" indi- Cause
cator flashes
x times
1 Fan fault
2 Level error during
8
system detection
3 Communication
fault
4 Fault in system
detection (stability
fault)
5 The programming
unit and control
structure are not
compatible.
Flashes contin- The control unit is
uously not programmed
correctly.
remedy
Identify which fan the fault relates to. If a
fan is blocked, remove the cause.
At least one fan emits a false alarm sig-
nal via the yellow wire. Check the voltage
(yellow wire — GND).
Standard mode : > 14.4 V
Alarm : < 1.65 V
Undefined state : 1.65 V < x < 14.4 V
Replace the fan if required.
Check the fan power supply.
Check that the yellow wire of the fan is
connected correctly.
Check the fan alarm output.
Check the wires between the program-
ming unit and the adaptor board.
Check that the adaptor board is correctly
plugged into the control unit. See chap-
ter "Installation / Electrical connection /
Connecting the programming unit to the
control unit".
Check whether a contact on the adaptor
board is broken or bent.
Check the fan power supply.
Check that the yellow wire of the fan is
connected correctly.
Check the fan alarm output.
Look up the system components on the
programming unit. Check the compatibil-
ity of the installed system components.
Replace the programming unit with a
compatible one.
Pair the control unit again. If pairing is
unsuccessful, restore the factory settings
with a reset.
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