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Disposal
xxx fault
Effect
7
No differen-
Constant pressure control
tial pressure
is not possible. The appli-
sensor Ex-
ance switches to flow rate
tract air
control.
8
No humidity
The unit cannot provide
value for the
humidity protection.
extract air
9
No humidity
The unit cannot provide
value for the
humidity protection.
outdoor air
10 No temper-
Automatic bypass mode
ature value
is not possible. Manual
for the ex-
changeover of the bypass
tract air
damper with options 0
and 1 of parameter P3 is
possible.
11 No temper-
Automatic bypass mode
ature value
is not possible. Manual
for the out-
changeover of the bypass
door air
damper with options 0
and 1 of parameter P3 is
possible.
16 The conden-
The unit switches off the
sate float
fans.
switch has
responded.
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.
201 No RTC
Time-dependent program
communi-
sequences are disrupted.
cation (RTC
= real-time
clock)
202 No RTC
Time-dependent program
pulse
sequences are disrupted.
203 Sensor volt-
The unit controls the fans
age too low
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.
204 Supply air
If the supply air tempera-
shutdown
ture falls below 5 °C, the
fan is switched off.
205 Maximum
The high limit safety cut-
outdoor air
out may respond.
temperature
exceeded
22
| VRC-W 400 (E)
All manuals and user guides at all-guides.com
Remedy
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.
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. 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 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. Replace the elec-
tronic assembly.
Isolate the appliance from the
power supply. Replace the elec-
tronic assembly.
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.
Check the preheating coil.
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.
Supply air
Exhaust air
Temperature [°C]
–30
–20
–10
0
10
20
25
30
40
50
60
70
80
90
100
110
120
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
Sensor type
PT 1000
PT 1000
pT 1000
Resistor [Ω]
882
922
961
1000
1039
1078
1097
1117
1155
1194
1232
1271
1309
1347
1385
1423
1461
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