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10.4.6 Heating/cooling changeover relay
If the H/C signal is to be sent to the bus as well as a relay output to e.g. switch a
valve
or
to be routed to a non-communicative device, the H/C changeover relay
can be configured accordingly.
Main menu > Commissioning > Extra configuration > Heating/cooling ch'over >
Configuration
Operating line
Range Factory
setting
Heating/cooling ch'over relay
---, N.Q1, N.Q2,…
---
The current state of the changeover relay is displayed:
Main menu > Heating/cooling ch'over >
Display values
Operating line
Current state
Heating/cooling ch'over relay
"Off": Cooling / "On": Heating.
During wiring test, the H/C changeover relay can be switched directly.
Main menu > Commissioning > Wiring test > Outputs >
Wiring test
Operating line
Comment
Heating/cooling ch'over relay
"Off": Cooling / "On": Heating.
10.4.7 Troubleshooting
If the changeover signal "Heating/Cooling" is missing in a 2-pipe heating/cooling
system, the controller continues to use the last received value. If there was never a
signal, "Heating" is used as the default value.
Behavior
No.
Text
Effect
5801
H/C changeover signal failure
Non-urgent message; must not be
acknowledged.
Fault message
Fault message ">1 heat/cool changeover signal" is generated in a 2-pipe
system if an H/C changeover input, H/C by calendar,
or
operating mode selector is
configured and a changeover signal from another device on the bus is received in
one of the zones.
Behavior
No.
Text
Effect
5802
>1 heat/cool changeover signal
Non-urgent message; must be
acknowledged.
Fault message
162 / 216
Siemens
Switching and monitoring device RMS705B
CE1P3124en
Building Technologies
H/C demand, H/C changeover
01.04.2010