Vaillant ecoTEC plus 418 - Page 96

Second diagnostic level
● As described above in the first diagnostic level, scroll through the diagnostic number
d.97.
● Change the displayed value to 17 (password) and press the “i” button. You are now in
the second diagnostic level where all information from the first diagnostic level (see table
10.2) and the second diagnostic level (see table 10.3) is displayed. Scrolling and
changing values and exiting the diagnostic mode is done as described in the first
diagnostic level.
NOTE:
After exiting the second diagnostic level, if you press “i” and “+” within 4 minutes, you
will directly reach the second diagnostic level with out having to enter the password
again.
Table 10.2 Diagnostics codes of the first diagnostic level
Display
Meaning
Display value/adjustable value
d. 0
Heating part load
Adjustable heating part load in kW
(factory setting: max. output)
d. 1
Water pump over run time for heating
mode
2 - 60 min (factory setting: 5 min)
d. 2
Max. burner anti cycling period at 20°C
Flow temperature
2 - 60 min (factory setting: 20 min)
d. 3
Hot water flow temperature reading
(when accessories are fitted)
in °C
d. 4
Current temperature for warm start
sensor (when accessories are fitted)
Current storage tank sensor
in °C
d. 5
Flow temperature target value or return
target value when return regulation is
set.
in °C, max. the value set in d.71 Limited
by the eBUS controller (if an eBUS
controller is connected)
d. 6
Hot water temperature target value
in °C, 35 to 65°C