Monitor Program Data and Controls
22 Danfoss Turbocor Compressors Inc.
ECD-00007M Rev. 1
6.2.1 Bearing Calibration Procedure
For the bearing calibration to be performed:
• The shaft must be de-levitated
• The interlock connection on the Chiller Interface
module must be open
1. Turn OFF the AC input power to the compressor and
wait 3-5 minutes for the capacitors to discharge.
2. Turn ON the AC input power to the compressor.
3. Launch the monitor program. If the monitor program is
already running, close it and open it again.
4. Change the compressor control mode to “Calibration
Mode”. Refer to 6.3 "Compressor Control" on page 23.
NOTE:
In Calibration mode, the compressor prepares itself for
calibration. Any external demand will be blocked from the
system, i.e., any external computer, PLC, building
management system, or automatic control will not be able
to write to the compressor.
5. From the menu bar, select “Advanced”→ “Bearing
Calibration”. The “Startup Check Calibration Data”
window appears, as shown in Figure 20.
6. Click on “Perform Calibration”. The message “Bearing
Calibration in Progress” appears. Observe if the
compressor makes a distinctive knocking noise; this
confirms the calibration is in progress. Do not click on
“Save Calibration”.
7. Open the “Compressor Event Log” window. From the
menu bar, select “Window”→ “Event Log”, or click on
the “Event Log” icon located below the menu bar.
Verify that the following message is displayed:
- “Bearing Calibration Performed”
Verify that the following error is not displayed:
- “Bearing Error: Calibration Failed”
If the bearing calibration is reported to have failed, try
to perform the bearing calibration one more time. If the
bearing calibration is still not successful, contact
Turbocor technical support.
8. For the following parameters in the “Startup Check
Calibration Data” window, compare the values between
Figure 21 Magnetic Bearing Configuration
Figure 22 Front and Rear Bearing Offset
Figure 23 Axial Bearing Offset
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