INsTALLATIoN
Troubleshooting
50 | LWZ130 www.stiebel-eltron.com
15. Troubleshooting
WARNING Electrocution
Disconnect the power supply by unplugging the appli-
ance from the mains before carrying out work inside
the appliance.
Fault Effect Remedy
--- No fault pres-
ent
E8
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.
E10
No tempera-
ture value for
the extract air
Passive cooling is not pos-
sible. Manual activation of
passive cooling with op-
tions 0 and 1 of parameter
P3 is possible.
Isolate the appliance from
the power supply. Check the
sensor cable.
E11
No tempera-
ture value for
the outdoor air
Passive cooling is not pos-
sible. Manual activation of
passive cooling with op-
tions 0 and 1 of parameter
P3 is possible.
Isolate the appliance from
the power supply. Check the
sensor cable.
E16
The conden-
sate float
switch has
responded.
The unit switches off the
fans.
Check the condensate drain.
Check the cable for break-
ages.
E17
Outdoor air
temperature
sensor short
circuit
No control to the comfort
temperature required for
passive houses of at least
16.5°C in the supply air
Isolate the appliance from
the power supply. Check the
sensor cable.
E18
Outdoor air
temperature
sensor lead
break
No control to the comfort
temperature required for
passive houses of at least
16.5°C in the supply air
Isolate the appliance from
the power supply. Check the
sensor cable.
E101
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 con-
trol signal that the electronic
assembly sends to the fan.
Check the speed signal that
the fan sends to the electron-
ic assembly. Replace the fan.
E102
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 con-
trol signal that the electronic
assembly sends to the fan.
Check the speed signal that
the fan sends to the electron-
ic assembly. Replace the fan.
E105
Maximum
outdoor air
temperature
exceeded
The high limit safety cut-
out may respond.
Isolate the appliance from
the power supply. Check the
air flow rate. Check the triac
for continuity. Check the sen-
sor cable.
E201
No RTC com-
munication
(RTC = re-
al-time clock)
Time-dependent program
sequences are disrupted.
Isolate the appliance from
the power supply. Replace
the electronic assembly.
E202
No RTC pulse
Time-dependent program
sequences are disrupted.
Isolate the appliance from
the power supply. Replace
the electronic assembly.
Fault Effect Remedy
E203
Sensor voltage
incorrect
The unit controls the fans
with the maximum value
of the currently set fan
stage. The unit cannot
provide humidity protec-
tion. Automatic passive
cooling is not possible.
Manual activation of pas-
sive cooling with options
0 and 1 of parameter P3 is
possible.
Isolate the appliance from
the power supply. Check the
sensor voltage after discon-
necting one of the following
sensor plugs: X15, X16, X23,
X24. Replace the sensor.
Replace the electronic as-
sembly.
E204
Supply air
shutdown
If the supply air tempera-
ture falls below 5°C, the
fan is switched off.
Check the preheating coil.
Check the triac for continuity.
E205
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.
If fault E16 is displayed, faults E101 and E102 are also displayed
in the fault memory.
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
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