Rockwell Automation 7000 PowerFlex Medium Voltage AC Drive (B Frame) - ForGe Control - Manual (Page 111)

Rockwell Automation Publication 7000-UM202B-EN-P - June 2014 111
Component Definition and Maintenance Chapter 3
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. It 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 25 .
For converter cabinets, see Converter Cabinet Components on page 50 .