Johnson Controls YORK YVAM 0350, Operation & Maintenance Manual

Page: 44 / 162

Magnetic bearing controller details screen
Figure 18: Magnetic bearing controller details screen
This screen displays the orientation of the magnetic bearing axes relative to the compressor
driveline similar to the MBC screen. Additional pertinent parameters transmitted to the control
panel from the MBC are displayed on this screen. Many parameters are shown in the diagram
in the locations they represent. The left end of the motor shaft graphic represents the low stage
(single stage) impeller end bearing. The right end of the motor shaft graphic represents the
opposite end bearing.
Table 24: Display only fields
Field/LED name Description
Z1 Temperature Displays the temperature measured at the impeller end bearing assembly.
A13 Unbalance / B13 Unbalance Magnitude of motion at 1x rotation in each of two vectors at the 1-stage impeller end.
A24 Unbalance / B24 Unbalance Magnitude of motion at 1x rotation in each of two vectors at the opposite 1-stage
impeller end.
Z2 Temperature Displays the temperature measured at the opposite impeller end bearing assembly.
Z12 Vibration Displays the vibration amplitude for specific frequencies measured axially by the
position sensors.
Magnetic bearing currents as described for the MBC screen are repeated on this
screen:
• W1 (Current)
• V1 (Current)
• Z1 (Current)
• V3 (Current)
• W3 (Current)
• W2 (Current)
• V2 (Current)
• Z2 (Current)
• V4 (Current)
• W4 (Current)
[MBC Status] AVR (LED) Indicates the MBC is reporting its automatic vibration reduction feature is active via
Modbus Data.
YVAM Control Center 44