Vaillant ecoTEC plus Instructions For Installation And Servicing page 41

Caution!
a
Access to the second diagnostic level must be
used exclusively by a qualified technician.
First Diagnostic level
• Press the "i" and "+" keys simultaneously. The display
shows "d.0".
• Use the "+" or "–" keys to scroll through the desired diag-
nostic numbers of the first diagnostic level (see table 10.2).
• Press the "i" key. The display shows the relevant diag-
nostic information.
• If necessary, use the "+" or "–" keys to change the
value (display flashes).
• Save the new value by holding down the "i" key for
approx. 5 seconds until the display no longer flashes.
You can end the diagnostic mode as follows:• Press
the "i" and "+" keys simultaneously.
Display Meaning
d. 0 Heating part load
d. 1 Water pump over run time for heating mode
d. 2 Max. burner anti cycling period at 20 °C Flow temperature
d. 3 Hot water flow temperature reading (when accessories are fitted)
d. 4 Current temperature for warm start sensor (when accessories
are fitted) Current storage tank sensor
d. 5 Flow temperature target value or return target value when return
regulation is set.
d. 6 Hot water temperature target value
d. 7 Warm start temperature target value (when accessories are fitted)
Storage temperature target value (system boiler only)
d. 8 External controls heat demand (terminals 3-4)
d. 9 Flow target temperature from external analogue regulator to
terminal 7-8-9/eBUS
d.10 Status internal heating pump
d.11 Status external heating pump
d.12 Cylinder charging pump (via accessory module)
d.13 Hot water circulation pump (via accessory module)
d.22 Hot water demand
d.23 Summer/Winter function
d.25 Hot water activation via eBUS Control
d.30 Control signal for both gas valves
d.33 Fan speed target value
d.34 Fan speed actual value
d.35 Position of diverter valve (when accessories are fitted)
d.36 Hot water flow sensor
d.40 Flow temperature Actual value
d.41 Return temperature Actual value
d.44 Digitised ionisation potential
d.47 Outside temperature (with weather compensating Vaillant controller only)
d.67 Remaining burner anti cycling time
d.76 Appliance variant (device specific number)
d.90 Digital regulator status
d.91 DCF status with connected external probe with DCF77 receiver
d.97 Activation of the second diagnostic level
Table 10.2 Diagnostics codes of the first diagnostic level
Instructions for installation and servicing ecoTEC plus 0020020828_07
• Do not press any key for approx. 4 minutes. The current
heating flow temperature appears in the display again.
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.
h Note!
After exiting the second diagnostic level, if you
press "i" and "+" within 4 minutes, you will di-
rectly reach the second diagnostic level with
out having to enter the password again.
Display value/adjustable value
Adjustable heating part load in kW (factory setting: max. output)
2 - 60 min (factory setting: 5 min)
2 - 60 min (factory setting: 20 min)
in °C
in °C
in °C, max. the value set in d.71 Limited by the eBUS
controller (if an eBUS controller is connected)
in °C, 35 to 65 °C
in °C, 40 to 65 °C in °C, 15 °C for left stop,
then 40 to 70 °C
0 = open (no heat request) 1 = closed (heat request)
in °C, minimum from ext. eBUS target value and target
value terminal 7
1 = on, 0 = off
1 to 100 = on, 0 = off
1 to 100 = on, 0 = off
1 to 100 = on, 0 = off
1 = on, 0 = off
1 = Winter, 0 = Summer
1 = yes, 0 = no
1 = on, 0 = off
in rpm/10
in rpm/10
0 = Heating; 100 = Hot water; 40 = Centre position
in l/min
in °C
in °C
Display range of 0 to 102, > 80 no flame, < 40 even flame
Actual value in °C
in min
00 to 99
1 = identified, 0 = unidentified (eBUS Address <=10)
0 = no reception, 1 = reception, 2 = synchronised, 3 = valid
Password: 17
Troubleshooting 10
41