Vaillant ecoTEC SERIES Instructions For Installation And Servicing page 51

Display Meaning
d.36 Hot water flow sensor
d.40 Flow temperature
d.41 Return temperature
d.44 Digitised ionisation potential
Outside temperature
d.47
(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
DCF status with connected external probe with DCF77
d.91
receiver
d.97 Activation of the second diagnostic level
Table 8.2 Diagnostic codes of the first diagnostic level
(continued)
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
8.2) and the second diagnostic level (see Table 8.3) is
displayed.
Display Meaning
d.17 Heating flow/return regulation changeover
d.18 Pump mode (return)
d.19 Only in ecoTEC plus:
Operating modes of the two-speed heating pump
d.20 Maximum set value for target cylinder temperature
(system boilers only)
d.27 Switching accessory relay 1 in the accessory module
d.28 Switching accessory relay 2 in the accessory module
Table 8.3 Diagnostics codes of the second diagnostic level
Instructions for installation and servicing ecoTEC 839592_12
Display value/adjustable value
in l/min
Actual value in °C
Actual value 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
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
without having to enter the password again.
Display value/adjustable value
0 = flow, 1 = return (factory setting: 0)
0 = return, 1 = nonstop, 2 = winter (factory setting: 0)
0 = pre ignition speed 1, hot water or heating speed 2, overrun speed
1
1 = pre ignition speed 1, hot water speed 2, heating speed 1, overrun
speed 1
2 = like 1, but speed in heating mode dependent on heating part
load d. 0 (if d.0 is below 60% of full load, then pump speed 1,
otherwise speed 2)
3 = always speed 2
(factory setting: 2)
Setting range: 50 to 70 °C (factory setting: 65 °C)
1 = Circulation pump (default)
2 = Ext. pump
3 = Storage charging pump
4 = Flue gas flap/extractor hood
5 = External gas valve
6 = External error message
1 = Circulation pump
2 = Ext. pump (default)
3 = Storage charging pump
4 = Flue gas flap/extractor hood
5 = External gas valve
6 = External error message
Troubleshooting 8
51