Basic Documentation

108/332
Siemens Universal controllers RMU710B, RMU720B, RMU730B CE1P3150en
Building Technologies Aggregates 03.10.2011
10.1.18 Wiring test
During the wiring test, the fans can be directly switched via the control switch.
Main menu > Commissioning > Wiring test > Outputs >
Operating line Comments
Supply air fan Off, On. or
Off, Speed 1, Speed 2, or
----, 0...100%
Extract air fan Off, On. or
Off, Speed 1, Speed 2, or
----, 0...100%
10.1.19 Troubleshooting
The fans are switched off if a fault message appears whose cause stops the plant.
They can be restarted only after the message for plant stop is no longer present.
When exiting the Commissioning menu, a check is made to see if the pressure
sensors are connected. If one of the present pressure sensors connected is
missing later, a message appears. If there is no pressure sensor, the fan operates
at the selected minimum speed.
No. Text Effect
1113 Supply air press diff
sensor error
Urgent message; must not be acknowledged
1123 Extr air press diff
sensor error
Urgent message; must not be acknowledged
10.1.20 Priorities
To operate the fans, the following priorities apply:
1. On / Off during wiring test
2. Off by fan supervision (flow signal, overload signal)
3. On via smoke extraction
4. Off via fault messages with plant stop (see section 24 "Faults")
5. On via overrun of "Step switch" (always speed 1)
6. Off via stop conditions "Extract air fan" (1+2)
7. Off via stop conditions "Supply air fan" (1+2)
8. On via start condition 2
9. On via start condition 1
10. Speed 2 locked (OT-dependent)
11. No release while the preheating function is active
12. Switching on or switching to a higher speed via sustained mode, night cooling
or indoor air quality controller
13. Preselection in normal operation (see section 6 "Operating modes")
Wiring test
Fault status messages