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