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Siemens Building Technologies
Commissioning instructions OZW775 V2.01
CE1C5663en
HVAC Products
Appendix
22.06.2012
7.4 Error code list for the central communication
unit
Error
code no.
Faults of the central communication unit
and associated fault text in ACS
Type of fault
Faults
0 No
fault
No acknowledgement
1 Plant
ok
No acknowledgement
2 Fault
No acknowledgement
3
No urgent fault
No acknowledgement
Sensors
101…108
[N.X1] … [N.X8] sensor error
No acknowledgement
Communication
5000
No bus power supply
No acknowledgement
5001
System time failure (OZW775 as slave)
No acknowledgement
5002
> 1 clock time master
Acknowledgment
5003
Invalid time of day (time OZW775 not set/set incorrectly) No acknowledgement
5012
Device failure (bus)
1)
No acknowledgement
5021
No modem communication
No acknowledgement
5023
Message receiver 1 not reached
No acknowledgement
5024
Message receiver 2 not reached
No acknowledgement
5025
Message receiver 3 not reached
No acknowledgement
5026
Message receiver 4 not reached
No acknowledgement
System error configuration
6001
>1 identical device address
(devices with identical address)
Acknowledgment
Miscellaneous errors
9001
…
9020
[Fault input 1] Fault
…
[Fault input 20] Fault
No acknowledgement
or acknowledgement
after setting
1911
…
1915
[Optg hours 1] service required
...
(Operating hours for service reached)
[Optg hours 5] service required
No acknowledgement
7251
Bus module not identified
No acknowledgement
1)
Device failure (bus) is a "System fault" sent by the central communication unit. This is why it is listed
in this table. The central communication unit only detects all other "System faults" and indicates them
depending on parameterization.