INsTALLATIoN
disposal
www.stiebel-eltron.com
LWZ 180 / LWZ 280 / LWZ 180 Enthalpie / LWZ 280 Enthalpie |
49
EN
GL
ISH
xxx Fault
Effect
remedy
7
No differen-
tial pressure
sensor Ex-
tract air
Constant pressure control
is not possible. The appli-
ance switches to flow rate
control.
Isolate the appliance from the
power supply. Check the sensor
cable. Check the pressure hoses
for contamination and damage.
If necessary, replace the sensor
and the hose. Check the setting of
the fan operating mode in menu
item P5.
8
No humidity
value for the
extract air
The unit cannot provide
humidity protection.
Isolate the appliance from the
power supply. Check the sensor
cable. Replace the sensor.
9
No humidity
value for the
outdoor air
The unit cannot provide
humidity protection.
Isolate the appliance from the
power supply. Check the sensor
cable. Replace the sensor.
10
No temper-
ature value
for the ex-
tract air
Automatic bypass mode
is not possible. Manual
changeover of the bypass
damper with options 0
and 1 of parameter P3 is
possible.
Isolate the appliance from the
power supply. Check the sensor
cable.
11
No temper-
ature value
for the out-
door air
Automatic bypass mode
is not possible. Manual
changeover of the bypass
damper with options 0
and 1 of parameter P3 is
possible.
Isolate the appliance from the
power supply. Check the sensor
cable.
16
The conden-
sate float
switch has
responded.
The unit switches off the
fans.
Check the condensate drain.
Check the cable for breakages.
101
Supply air
fan
The unit does not receive
any speed feedback from
the fan. There is no effect
on the flow rate control
mode.
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.
102
Exhaust air
fan
The unit does not receive
any speed feedback from
the fan. There is no effect
on the flow rate control
mode.
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.
201
No RTC
communi-
cation (RTC
= real-time
clock)
Time-dependent program
sequences are disrupted.
Isolate the appliance from the
power supply. Replace the elec-
tronic assembly.
202
No RTC
pulse
Time-dependent program
sequences are disrupted.
Isolate the appliance from the
power supply. Replace the elec-
tronic assembly.
203
Sensor volt-
age too low
The unit controls the fans
with the maximum value
of the currently set fan
stage. The unit cannot
provide humidity protec-
tion. Automatic bypass
mode is not possible.
Manual changeover of
the bypass damper with
options 0 and 1 of param-
eter P3 is possible.
Isolate the appliance from the
power supply. Check the sensor
voltage after disconnecting one
of the following sensor plugs:
X15, X16, X23, X24. Replace the
sensor. Replace the electronic
assembly.
204
Supply air
shutdown
If the supply air tempera-
ture falls below 5 °C, the
fan is switched off.
Check the preheating coil.
205
Maximum
outdoor air
temperature
exceeded
The high limit safety cut-
out may respond.
Isolate the appliance from the
power supply. Check the triac
for continuity. Check the sensor
cable.
Sensor resistance values
Note
When measuring with a multimeter, the resistance values
serve only to identify faulty or incorrect sensors. Measur-
ing with a multimeter is too imprecise to test for accuracy.
sensor type
Supply air
PT 1000
Exhaust air
PT 1000
PT 1000
Temperature [°C]
resistance [Ω]
–30
882
–20
922
–10
961
0
1000
10
1039
20
1078
25
1097
30
1117
40
1155
50
1194
60
1232
70
1271
80
1309
90
1347
100
1385
110
1423
120
1461
16. Disposal
Removal
WARNING Electrocution
Disconnect the appliance from the power supply.
The following tools are required for disassembly and material
separation prior to disposal:
- Personal protective equipment
- Set of screwdrivers
- Set of spanners
- Combi pliers
- Stanley knife
