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Building Technologies Basic documentation: Communication via the KNX bus CE1P3127en
HVAC Products Appendix 30.08.2007
9.1.2 Communication errors
The following is a list of errors associated with communication over the KNX bus
(see also the listed sections in this document).
Fault No. Fault message on
RMZ79x operator unit
Type of failure
5000
No bus power supply No bus power supply
5001
System time failure System time failure (slave)
5101
Time swi fail pl 1 Time switch program failure (plant 1)
5111
Time swi fail pl 2 Time switch program failure (heating circuit 2)
5201
Hol/spec day failure Failure holiday/special day program
5301
DHW time swi fail DHW time switch program failure
5401
Room mast fail pl 1 Room master failure (plant 1)
5411
Room mast fail pl 2 Room master failure (heating circuit 2)
Fault No. Fault message on
RMZ79x operator unit
Setting errors
6001
>1 id device address More than one device with identical device address
5002
>1 clock time master More than one clock time master
5102
>1 time switch pl 1 More than one time switch program active in same zone
(plant 1)
5112
>1 time switch pl 2 More than one time switch program active in same zone
(heating circuit 2)
5202
>1 hol/sp day prgm More than one holiday/special day program active in the
same day/special day zone
5302
>1 DHW time switch More than one time DHW switch program active in same
zone
5402
>1 geogr zone [1] More than one controller operating as room master in the
identical geographical zone [1]
5412
>1 geogr zone [2] More than one controller operating as room master in the
identical geographical zone [2] (e.g. RMH: heating circuit 2)
Failure
Setting errors
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