Technical information

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KWE P/N 394038 Versatronik 505 and 505D BACIP Gateway V1.2 February 2014 Technical information subject to change without notice
Appendix A—Fault Codes
Error codes for Viessmann control units based on controls/equipment installed
Fault Codes
Fault Code (hex) Description
00 System without fault
0F Perform maintenance check-up
10 Short circuit, outdoor temperature sensor
18 Interruption, outdoor temperature sensor
20 Short circuit, supply temperature sensor HC1/system
28 Interruption, supply temperature sensor HC1/system
30 Short circuit, boiler water temperature sensor
38 Interruption, boiler water temperature sensor
40 Short circuit, supply temperature sensor heating circuit 2
41 Short circuit, return temperature sensor heating circuit 2
44 Short circuit, supply temperature sensor heating circuit 3
45 Short circuit, return temperature sensor heating circuit 3
48 Interruption, supply temperature sensor heating circuit 2
49 Interruption, return temperature sensor heating circuit 2
4C Interruption, supply temperature sensor heating circuit 3
4d Interruption, return temperature sensor heating circuit 3
50 Short circuit, DHW tank temperature sensor
51 Short circuit, DHW tank temperature sensor 2
58 Interruption, DHW tank temperature sensor
59 Interruption, DHW tank temperature sensor 2
60 Short circuit, return temperature sensor 17
68 Interruption, return temperature sensor 17
70 Short circuit, supply/return temperature sensor 17B
78 Interruption, supply/return temperature sensor 17B
92 Solar: collector temperature short circuit
93 Solar: collector return temperature short circuit
94 Solar: collector DHW tank temperature sensor short circuit
9A Solar: collector temperature sensor open circuit
9B Solar collector return temperature sensor open circuit
9C Solar: DHW tank temperature sensor open circuit
9F Solar: general fault message
A7 Fault control unit wireless clock module
AE Internal fault mixing valve
AF Internal fault mixing valve
b0 Short circuit, flue gas temperature sensor
b1 Communication fault, programming unit (internal)
b4 Internal fault
b5 Internal fault
b6 Internal fault, invalid hardware recognition
b7 Internal fault, boiler protection coding card
b8 Interruption, flue gas temperature sensor
bA Fault, mixing valve module (KM-BUS)
bC Fault, Vitotrol heating circuit 1 (KM-BUS)
bd Fault, Vitotrol heating circuit 2 (KM-BUS)
bE Fault, Vitotrol heating circuit 3 (KM-BUS)
C1 External fault indication, boiler
C2 Communication fault solar control unit (KM-BUS)
Fault Code (Dec)
00
15
16
24
32
40
48
56
64
65
68
69
72
73
76
77
80
81
88
89
96
104
112
120
146
147
148
154
155
156
159
167
174
175
176
177
180
181
182
183
184
186
188
186
190
193
194