Appendix; A Diagnostics Level 1 Diagnostics Codes - Vaillant atmoTEC exclusive Installation And Maintenance Instructions Manual

Appendix

A Diagnostics level 1 diagnostics codes
Since the code table is used for various products, some codes may not be visible for the product in question.
Diagnostics code
d. 0 Partial heat load
d. 1 Pump overrun
d. 2 Maximum heating anti-cyc-
ling time at 20°C flow temperat-
ure
d. 3
Target warm start temperature
(product with integrated domestic
hot water generation)
Target cylinder temperature
(product without integrated do-
mestic hot water generation and
with a connected domestic hot
water cylinder)
d. 4
Display of secondary heat ex-
changer – temperature (product
with integrated domestic hot wa-
ter generation)
Cylinder temperature (product
without integrated domestic hot
water generation and with con-
nected domestic hot water cylin-
der)
d. 5 Target flow temperature
d. 6 Target domestic hot water
temperature
d. 8 Room thermostat at termin-
als 3 and 4
d. 9 Target flow temperature
from the external control at ter-
minal 7-8-9/eBUS
d.10 Status of the internal heat-
ing pump
d.11 Status of the external heat-
ing pump
d.15 Pump speed
d.22 Domestic hot water require-
ment
d.23 Summer mode (heating
on/off)
d.25 Cylinder charging/warm
start enabled by the control
d.30 Control signal for both gas
valves
d.35 Position of the prioritising
diverter valve
0020214272_04 atmoTEC exclusive, atmoTEC plus Installation and maintenance instructions
Values
Unit
Min. Max.
kW
Product- Product-
de- de-
pend- pend-
ent ent
2 60 min
2 60 min
℃
Current value
℃
Current value
℃
30 Value
set
under
d.71
℃
35 65
–
Current value
℃
Current value
–
Current value
–
Current value
Current value %
–
Current value
–
Current value
–
Current value
–
Current value
–
Current value
Increment, select, explanation
1
1
1
99 = No NTC connected
999 = NTC short circuit
99 = No NTC connected
999 = NTC short circuit
1
1
0 = Open (no heat requirement)
1 = Closed (heat requirement)
–
1, 2 = On
0 = Off
1 to 100 = On
0 = Off
–
1 = On
0 = Off
1 = Heating on
0 = Heating off (Summer mode)
1 = Yes
0 = No
1 = On
0 = Off
0 = Heating mode
40 = Mid-position
100 = Domestic hot water mode
Appendix
Default set-
ting
Full load
5
20
–
–
75
60
–
–
–
–
–
–
–
–
–
–
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