Setting The Flow Temperature In Heating Mode (With No Control Connected); Instructing The End User; 10 Troubleshooting; Contacting Your Service Partner - Vaillant VWL 57/5 IS Operating, Installation And Maintenance Instructions

9.3 Setting the flow temperature in heating mode
(with no control connected)
1. Press ( ).
◁
The display shows the flow temperature in heating
mode.
2. Change the flow temperature in heating mode by press-
ing or .
– Max. heating mode target flow temperature: 75 ℃
3. Confirm this change by pressing
9.4

Instructing the end user

Danger!
Risk of death from legionella.
Legionella multiply at temperatures below
60 °C.
▶
Ensure that the end user is familiar with
all of the Anti-legionella measures in order
to comply with the applicable regulations
regarding legionella prevention.
▶
Explain to the end user how the safety devices work and
where they are located.
▶
Inform the end user how to handle the product.
▶
Draw particular attention to the safety warnings, which
the end user must follow.
▶
Inform the end user that they must have the product
maintained in accordance with the specified intervals.
▶
Explain to the end user how to check the system's water
volume/filling pressure.
▶
Pass all of the instructions and documentation for the
product to the end user for safe-keeping.

10 Troubleshooting

10.1

Contacting your service partner

If you contact your service partner, please mention if pos-
sible:
–
The fault code that is displayed (F.xx)
–
The status code (S.xx) that is displayed by the product in
the Live Monitor
10.2 Displaying the Live Monitor (current product
status)
Menu → Live Monitor
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.
Status codes (→ Page 50)
0020257319_02 Hydraulic station Installation and maintenance instructions
10.3
The display shows a fault code F.xxx.
Fault codes have priority over all other displays.
Fault codes (→ Page 53)
If multiple faults occur at the same time, the display shows
the corresponding fault codes for two seconds each in se-
quence.
▶
Eliminate the fault.
(OK).
▶
To restart the product, press the reset button ( Operating
instructions).
▶
If you are unable to eliminate the fault and the fault re-
curs despite several reset attempts, contact Customer
Service.
10.4
Menu → Installer level Fault list
The product has a fault memory. You can use this to query
the last ten faults that occurred in chronological order.
Display views:
–
Number of faults that occurred
–
The fault currently selected with fault number F.xxx
▶
Use the
occurred.
10.5
1.
2.
10.6
You can also use the check programmes for troubleshooting.
(→ Page 37)
10.7
▶
Select Menu → Installer level → 17 → Resets to reset
all of the parameters at the same time and to restore the
product to its factory settings.
10.8
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 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.
Troubleshooting 10

Checking fault codes

Querying the fault memory

or button to display the last ten faults that

Resetting the fault memory

Press Delete.
Confirm that you wish to clear the fault memory by
pressing OK.

Using check programmes

Resetting parameters to factory settings

Safety cut-out

39