Rockwell Automation Publication 7000-UM202D-EN-P - May 2018 115
Power Component Definition and Maintenance Chapter 2
Rockwell Automation currently uses Ashcroft air pressure sensors. In the event
of reduced fan performance or air blockage, the sensor notes the reduced
differential pressure and triggers a warning message to the console. One likely
cause of such a performance reduction would be partially plugged filters at the
air inlet.
If airflow becomes reduced to the point of risking thermal damage, the sensor
triggers a fault signal that shuts down the drive. Also, in the event of fan failure,
the sensor will detect the pressure change and stop the drive.
Replacing the Air Pressure Sensor
1. Remove the wires at the sensor and note their designation.
2. Disconnect the clear tube on the low pressure port. Remove the two
mounting screws of the sensor.
3. Check the integrity of the existing sealant where the clear tubing passes
through the sheet metal barrier.
4. Installing the replacement airflow sensor is in the reverse order of its
removal.
DC Link and Fan Cabinet
Components
This section describes the DC link and fan cabinet components of your
PowerFlex 7000 “B” Frame drive. This section also details a number of regular
or recurring maintenance tasks that will keep your drive in peak operating
condition.
For control and cabling cabinets, see Control / Cabling Cabinet Components
on page 29.
For converter cabinets, see Converter Cabinet Components
on page 54.
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