Heating/Cooling Ch'over Relay; Troubleshooting - Siemens RMB795B Basic Documentation

Configuration
Display values
Wiring test
Behavior
Fault status message
Behavior
Fault status message
Siemens
Building Technologies

11.6.7 Heating/cooling ch'over relay

If the H/C-signal is not to be sent to the bus but rather to 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
Operating line
Heating/cooling changeover
relay
The current state of the changeover relay can be queried:
Main menu > Heating/cooling ch'over
Operating line
Heating/cooling changeover
relay
During wiring test, the H/C changeover relay can be switched directly.
Main menu > Commissioning > Wiring test > Outputs
Operating line
Heating/cooling changeover
relay

11.6.8 Troubleshooting

The controller continues to apply the last received value if in a 2-pipe system the
changeover signal "Heating/cooling" is not on the bus. If there has never been a
signal, "Heating" is used as the default value.
No. Text
5801 H/C changeover
signal failure
The fault message "> 1 H/C changeover signal" is sent, if, in a 2-pipe system an
H/C changeover input heating/cooling is configured by date or Operating mode
selector and a changeover signal in one of the zones is received by another device
on the bus.
No. Text
5802 >1 Heating/cooling
changeover signal
Central control unit RMB795B
Distribution zones
Area
---, N.Q1, N.Q2,.../
Current state
"Off": Cooling / "On": Heating
Comments
"Off": Cooling / "On": Heating
Effect
Non-urgent message; must not be
acknowledged
Effect
Non-urgent message; must be acknowledged
Factory setting
---
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CE1P3122en
18.01.2012