Fault Codes; Fault Memory - Vaillant ecoTEC VU 656/4 Installation And Maintenance Instructions Manual

9 Troubleshooting
Display Meaning
d.81 Operating hours hot water generation
d.82 Burner start-ups in heating mode
d.83 Burner start-ups in hot water mode
d.84 Maintenance indicator: Number of hours until the next
maintenance
d.93 DSN appliance variant setting
d.96 Factory setting
1) In the diagnosis codes 80 to 83 5 digit figure values are stored. When selecting e.g. d.80 only the first two digits of the figure value
are displayed (e.g.10). By pressing the "i" key, the display switches over to the last three figures (e.g. 947). The operating hours
counter of the heating in this case would be 10947 h. Pressing the "i" again causes the display to switch back to the diagnosis point
that was called up.
Table 9.3 Diagnosis codes at diagnosis level 2 (continued)
9.1.3

Fault codes

The fault codes displace all other displays when errors
occur. Errors are displayed as "F ...", e.g. "F.10"
(see Table 9.4).
If several errors occur simultaneously, each fault code is
displayed for approximately two seconds on an
alternating basis.
Once you have repaired the error push the fault
clearance key to restart the boiler.
If the error cannot be repaired and reoccurs despite
having carried out several fault clearance attempts,
please contact your factory customer service.
9.1.4

Fault memory

The last ten errors which occurred are saved in the
appliance fault memory.
• Push the "i" and „-" buttons simultaneously.
• Scroll back in the error memory with the "+" button.
You can exit the fault memory display as follows:
• Push the "i" button
or
• Do not push any buttons for about 4 minutes.
Depending on the settings, the current flow temperature
or current filling pressure of the heating installation
reappears in the display.
48
Display value/adjustable value
1)
in h
1)
Number/100 (3 equals 300)
1)
Number/100 (3 equals 300)
Setting range: 0 to 3000h and "-" for deactivated
Factory setting: "-" (300 corresponds to 3000h)
Setting range: 0 to 99
1 = yes (Resetting adjustable parameters to factory setting)
2 = no
Installation and maintenance instructions ecoTEC 0020029173_01