Vaillant ECOTEC PLUS VU 80 Installation And Maintenance Instructions Manual page 57

14.2.4 Calling up diagnostics levels
Menu ¬ Installer level ¬ Diagnostics menu
You can use the diagnostics menu to inspect parameters
and modify certain parameters. An overview of all diagnos-
tics codes can be found in ¬ table 12.1.
14.2.5 Overview of diagnostics codes at installer
level
Display Meaning
D.000 Heating partial load
D.001 Pump overrun for heating mode
D.002 Max. burner anti-cycling time heating at 20 °C flow
temperature
D.005 Flow temperature target value (or return target value)
D.006 Hot water temperature target value
D.007 Warm start temperature target value
D.010 Heating pump status of the pump group
D.011 Status of external heating pump
D.014 Target value for pump speed
D.016 Room thermostat 24 V DC at terminal 3'-4' (only NL)
D.017 Heating flow/return regulation changeover
D.018 Pump operating mode setting
D.022 Hot water demand via C1/C2, internal hot water control
system
D.023 Summer/winter operating mode (heating on/off)
D.025 Hot water generation enabled by eBUS controller
D.027 Switching of relay 1 on the
"2 in 7" multi-functional module VR 40
D.028 Switch of relay 2 on the "2 from 7" multi-functional
module VR 40
14.2 Diagnostics codes at installer level
ecoTEC plus installation and maintenance instructions 0020134823_01
Display value/adjustable value
Adjustable heating partial load in kW
(Factory setting: auto: Unit automatically adjusts max. partial load to
current system demand)
2 - 60 minutes (factory setting: 5)
2 - 60 minutes (factory setting: 20)
In °C, max. of the value set in D.071, limited by an eBUS controller if
connected
35 to 65 °C
40 to 65 °C
1 = on, 0 = off
1 to 100 = on, 0 = off
Heating circuit pump target value in %
0 = auto (default setting)
1 = 53
2 = 60
3 = 70
4 = 85
5 = 100
0 = Room thermostat open (no heating mode)
1 = Room thermostat closed (heating mode)
0 = flow, 1 = return (default setting: 0)
1 = Comfort (continuously operating pump)
3 = Eco (intermittently operating pump, default setting)
1 = on, 0 = off
1 = Heating on, 0 = Heating off (summer mode)
1 = Yes, 0 = No
1 = Circulation pump (default setting)
2 = Ext. pump
3 = Charging pump
4 = Extractor hood
5 = Ext. solenoid valve
6 = Ext. error message
7 = Not active
8 = Remote control eBUS (not active)
9 = Anti-legionella pump (not active)
1 = Circulation pump
2 = Ext. pump (factory setting)
3 = Charging pump
4 = Extractor hood
5 = Ext. solenoid valve
6 = Ext. error message
7 = Not active
8 = Remote control eBUS (not active)
9 = Anti-legionella pump (not active)
Troubleshooting 14
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