User Manual

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Siemens Universal controllers RMU710B, RMU720B, RMU730B CE1P3150en
Building Technologies Aggregates 03.10.2011
10.4.7 Function check / wiring test
The current state of the heat recovery system is displayed on the operator unit.
Main menu > Aggregates >
Operating line Comments
Output modulating 0...100%
Output relay Off, On
Efficiency heat recovery ----, 0...100%
During the wiring test, the modulating output can be directly controlled.
Main menu > Commissioning > Wiring test > Outputs >
Operating line Comments
Heat recovery output ----, 0...100%
10.4.8 Troubleshooting
Errors in operation
When you exit the "Commissioning" menu, a check is made to see which sensors
are connected. If one of the sensors connected now is missing, fault message
"[...X...] sensor error" appears.
No. Text Effect
101… [N.X1] sensor error, .. Non-urgent message; must not be
acknowledged
If efficiency cannot be calculated, the display shows "----" as efficiency.
If the sensors for Maximum Economy Changeover are missing, there is no
changeover.
Configuration error
If "MECH input 2" does not use the same unit as "MECH input 1", only the first
input is considered for changeover. If none of the inputs or only "MECH input 2" is
configured, Maximum Economy Changeover is deactivated.
If calculation of the efficiency does not include configuration of two temperature
sensors, efficiency is not calculated and no fault message is generated.
Display values
Wiring test
Fault status messages