Resetting The Fault Memory; Displaying Live Monitor (Status Codes); Using The Function Menu; Carrying Out The Actuator Test - Vaillant VWL Series Operating Instructions Manual

11 Inspection and maintenance

10.4

Resetting the fault memory

▶
Press twice and then Delete and OK to delete the
fault list.
10.5

Displaying Live Monitor (status codes)

Status codes in the display provide information on the pro-
duct's current operating mode. These can be called up via
the Live Monitor menu.
10.6

Using the function menu

You can use the function menu to actuate and test individu-
al components of the product during the fault diagnostics.
(→ Page 38)
10.7

Carrying out the actuator test

Menu → Installer level → Test menu → Sensor/actuator
test
You can check that the components of the heating installa-
tion are functioning correctly using the sensor/actuator test.
You can actuate more than one actuator at a time.
If you do not select anything to change, you can have the
current control values for the actuators and the sensor val-
ues displayed.
You can find a list of the sensor characteristic values in the
appendix.
Characteristic values for the internal temperature sensors,
hydraulic circuit (→ Page 58)
Characteristic values for the VRC DCF outdoor temperature
sensor (→ Page 59)
10.8

Resetting parameters to factory settings

▶
Select Menu → Menu → Installer level → Resets to reset
all of the parameters at the same time and to restore the
product to the factory settings.
10.9

Safety cut-out

The product has a safety cut-out.
If the safety cut-out has tripped, the cause must be elimin-
ated and the safety cut-out replaced.
▶
See the "Fault codes" table in the appendix.
Fault codes (→ Page 53)
▶
Check the back-up heater for damage due to overheat-
ing.
▶
Check that the power supply for the power supply PCB is
working properly.
▶
Check the cabling for the power supply PCB.
▶
Check the cabling for the electric back-up heater.
▶
Check that all temperature sensors are working properly.
▶
Check that all other sensors are working properly.
▶
Check the pressure in the heating circuit.
▶
Check that the heating circuit pump is working properly.
▶
Check whether there is air in the heating circuit.
38
10.9.1 Replace the safety cut-out
C
B
1. Disconnect the product from the power grid and protect
it against being switched back on.
2. Remove the front casing.
3. Open the power supply PCB's electronics box.
(→ Page 30)
4. Remove the connection cable on the X302 terminal
block.
5. Remove the temperature sensor's capillary tube on the
electric back-up heater.
6. Remove both screws and remove the safety cut-out
with the retainer from the product.
7. Install the new safety cut-out in reverse order.
11 Inspection and maintenance
11.1

Procuring spare parts

The original components of the product were also certified
by the manufacturer as part of the declaration of conformity.
If you use other, non-certified or unauthorised parts during
maintenance or repair work, this may void the conformity of
the product and it will therefore no longer comply with the
applicable standards.
We strongly recommend that you use original spare parts
from the manufacturer as this guarantees fault-free and safe
operation of the product. To receive information about the
available original spare parts, contact the contact address
provided on the back page of these instructions.
▶
If you require spare parts for maintenance or repair
work, use only the spare parts that are permitted for the
product.
Installation and maintenance instructions Hydraulic Station 0020291544_01
A