Contacting Your Service Partner - Vaillant ecoTEC plus 806 VU GB 806/5-5 Installation And Maintenance Instructions Manual

10 Troubleshooting
10.1

Contacting your service partner

If you contact your Vaillant service partner, if possible,
please mention
–
the fault code that is displayed (F.xx),
–
the product status (S.xx) that is displayed on the Live
Monitor (→ Page 17).
10.2 Calling up service messages
If the maintenance symbol appears in the display, there is
a service message.
The maintenance symbol appears if you have set a mainten-
ance interval, for example, and it has elapsed. The product is
not in fault mode.
▶
To obtain more information about the service message,
call up the Live monitor (→ Page 17).
Conditions: S.44-S.48 is displayed
The product is in Comfort protection mode. The product con-
tinues to run with restricted comfort after it has detected a
fault.
▶
To establish whether or not a component is defective,
read the fault memory (→ Page 32).
Note
If no fault message is present, the product will
automatically switch back to normal operating
mode after a certain time.
10.3 Reading off the fault codes
If a fault develops in the product, the display shows a fault
code F.xx.
Fault codes have priority over all other displays.
If multiple faults occur at the same time, the display shows
the corresponding fault codes for two seconds each in se-
quence.
▶
Rectify the fault.
▶
To restart the product, press the fault clearance key (
Operating instructions).
▶
If you are unable to remedy the fault and the fault recurs
despite several fault clearance attempts, contact Vaillant
Service.
10.4 Querying the fault memory
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.
The display shows:
–
The number of faults that have occurred
–
The fault currently selected with fault number F.xx
–
A plain text display explaining the fault.
▶
You can display the last ten faults that have occurred by
pressing or .
32
Overview of fault codes (→ Page 42)
10.5 Resetting the fault memory
▶
To delete the entire fault list, press
twice.
10.6 Performing diagnostics
▶
You can use the function menu (→ Page 27) to actuate
and test individual components of the product in the fault
diagnostics.
10.7 Using check programmes
You can also use check programmes (→ Page 19) for
troubleshooting.
10.8 Resetting parameters to factory settings
▶
To reset all parameters simultaneously to the default
settings, set D.096 to 1.
10.9 Preparing the repair work
1. Decommission the product.
2. Disconnect the product from the power mains.
3. Remove the front casing.
4. Close the gas isolator cock.
5. Close the service valves in the heating flow and in the
heating return.
6. Close the service valve in the cold water pipe.
7. Drain the product if you want to replace water-bearing
components of the product.
8. Make sure that water does not drip on live components
(e.g. the electronics box).
9. Use only new seals.
Installation and maintenance instructions ecoTEC plus 0020134823_04
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