Appendix; A Overview Of Diagnostics Codes - Vaillant ecoTEC plus VU GB 656/4-5 A Installation And Maintenance Instructions Manual

Appendix

A Overview of diagnostics codes
Note
Since the code table is used for various products, some codes may not be visible for the product in question.
Code Parameter
D.0 Heating partial load, adjustable val-
ues in kW
D.1 Internal heating pump overrun time
D.2 Max. burner anti-cycling time heating
at 20 °C flow temperature
D.4 Measured value for the cylinder tem-
perature in °C
D.5 Flow temperature target value (or
return target value) in °C
D.7 Target cylinder temperature
D.8 Room thermostat at terminals 3-4
D.9 Target feed temperature in °C from
the external continuous controller at
terminal 7-8-9/BUS
D.10 Status of the internal heating pump
D.11 Status of additional external heating
pump
D.12 Status of cylinder charge pump
D.13 Status of circulation pump
D.14 Setting for speed-controlled internal
heating pump
D.15 Current speed of the internal heating
pump in %
D.17 Control type
D.18 Pump operating mode (overrun)
D.20 Max. setting for cylinder target value
D.22 External cylinder charging, terminal
C1-C2
D.23 Summer/winter mode (heating off/on)
D.24 Not relevant
1. Five-digit numbers are saved for diagnostics codes 80 to 83. If you select D.80, for example, only the first two digits of the number
will be displayed (e.g. 10). Pressing
ating hours for the heating is 10947 hrs. Pressing the
called up.
0020214491_01 ecoTEC plus Installation and maintenance instructions
Values or explanations
Adjustable heating partial load
2 ... 60 min
2 ... 60 min
If a domestic hot water cylinder with sensor is connected
Current target value, max. of the value set in D.71, re-
stricted by an eBUS controller, if connected
(15 °C = frost protection, 40 °C up to D.20 (max. 70 °C))
0 = Room thermostat open (no heat requirement)
1 = Room thermostat closed (heat requirement)
Minimum from the external BUS target value and target
value for terminal 7
0 = Off
1 = On
0 = Off
1-100 = On
0 = Off
1-100 = On
0 = Off
1-100 = On
0 = Auto
1 = 53
2 = 60
3 = 70
4 = 85
5 = 100
in %
0 = Flow control
1 = Return flow temperature control
0 = Overrun
1 = Continuous
2 = Winter
3 = Intermittent
Adjustment range: 40-70 °C
1 = on, 0 = off
0 = Heating off (Summer mode)
1 = Heating on
Not relevant
switches the display to the last three digits (e.g. 947). In this example, the number of oper-
again causes the display to switch back to the diagnostics code that was
Appendix
Default set- Own setting
ting
Approx. 70%
of the max-
imum output
5 min
20 min
Not
adjustable
Not
adjustable
Not
adjustable
Not
adjustable
Not
adjustable
Not
adjustable
Not
adjustable
Not
adjustable
Not
adjustable
0
Not
adjustable
0
3
65 ℃
Not
adjustable
31