Heating/cooling ch'over relay
If, instead of being transmitted over the bus, the H/C changeover signal is provided at a relay output, e.g. for switch control of a valve, or forwarding to a non-communicating device, the H/C changeover relay can be configured accordingly. See the notes on connecting the primary controller to the changeover valve.
Main menu > Commissioning > Extra configuration > Heating/cooling ch'over
|Operating line||Range||Factory setting|
|Heating/cooling ch'over relay||----, N.Q1, N.Q2,…/||----|
Current contact position
The current contact position (status) of the changeover relay can be displayed via the Service level.
Main menu > Heating/cooling ch'over
|Operating line||Current contact position (status)|
|Heating/cooling ch'over relay||Open (Off) Cooling / Closed (On): Heating|
Fault status messages
H/C changeover signal failure
In a 2-pipe system without H/C changeover signal on the KNX bus, the controller continues to use the last received value. If the signal never existed, "Heating" is used as default value.
Fault status message 5801
|5801||H/C changeover signal failure||Non-urgent message; no acknowledgement required.|
> 1 H/C changeover signal
If the "H/C changeover" in a 2-pipe system is configured so that it is initiated by calendar or operating mode selector, and if a changeover signal is received in one of the zones from another device, message ">1 heat/cool changeover signal" is transmitted.
Fault status message 5802
|5802||>1 heat/cool changeover signal||Non-urgent message; must be acknowledged.|