York OPTIVIEW Operation Manual page 120

SECTION 2 - OPTIVIEW CONTROL CENTER INTRODUCTION
TABLE 8 - CYCLING SHUTDOWN MESSAGES (CONT'D)
MESSAGE
MBC – V13 POSITION
MBC – V24 LOW FREQUENCY
DISPLACEMENT
MBC – V24 POSITION
MBC – W13 LOW FREQUENCY
DISPLACEMENT
MBC – W13 POSITION
MBC – W24 LOW FREQUENCY
DISPLACEMENT
MBC – W24 POSITION
MBC – VW13 VIBRATION
120
The MBC has measured shaft displacement is greater than 75 µm from center in the
orthogonal radial axis designated V at the impeller end radial magnetic bearing during
Levitation or Rotation mode (approximately 1/2 of the air gap space to the touchdown
bearing). The MBC ESD Fault contacts open. The MBC remains in Levitation mode with
the motor shaft levitated until commanded to de-levitate over serial comms or VSD DC
buss power depletes. This shutdown is released when displacement is less than 75 µm.
The MBC has measured shaft displacement is greater than 75 µm from center in the
orthogonal radial axis designated V at the opposite-impeller end radial magnetic bearing
during Levitation or Rotation mode over a 7 second window (approximately 1/3 of the
air gap space to the touchdown bearing). The MBC ESD Fault contacts open. The MBC
remains in Levitation mode with the motor shaft levitated until commanded to de-levitate
over serial comms or VSD DC buss power depletes. This warning is released when
displacement is less than 75 µm.
The MBC has measured shaft displacement is greater than 75 µm from center in the
orthogonal radial axis designated V at the opposite-impeller end radial magnetic bearing
during Levitation or Rotation mode (approximately 1/2 of the air gap space to the touchdown
bearing). The MBC ESD Fault contacts open. The MBC remains in Levitation mode with the
motor shaft levitated until commanded to de-levitate over serial comms or VSD DC buss
power depletes. This shutdown is released when displacement is less than 75 µm.
The MBC has measured shaft displacement is greater than 75 µm from center in the
orthogonal radial axis designated W at the impeller end radial magnetic bearing dur-
ing Levitation or Rotation mode over a 7 second window (approximately 1/3 of the air
gap space to the touchdown bearing). The MBC ESD Fault contacts open. The MBC
remains in Levitation mode with the motor shaft levitated until commanded to de-levitate
over serial comms or VSD DC buss power depletes. This warning is released when
displacement is less than 75 µm.
The MBC has measured shaft displacement is greater than 75 µm from center in the
orthogonal radial axis designated W at the impeller end radial magnetic bearing during
Levitation or Rotation mode (approximately 1/2 of the air gap space to the touchdown
bearing). The MBC ESD Fault contacts open. The MBC remains in Levitation mode with
the motor shaft levitated until commanded to de-levitate over serial comms or VSD DC
buss power depletes. This shutdown is released when displacement is less than 75 µm.
The MBC has measured shaft displacement is greater than 75 µm from center in the or-
thogonal radial axis designated W at the opposite-impeller end radial magnetic bearing
during Levitation or Rotation mode over a 7 second window (approximately 1/3 of the
air gap space to the touchdown bearing). The MBC ESD Fault contacts open. The MBC
remains in Levitation mode with the motor shaft levitated until commanded to de-levitate
over serial comms or VSD DC buss power depletes. This warning is released when
displacement is less than 75 µm.
The MBC has measured shaft displacement is greater than 75 µm from center in the
orthogonal radial axis designated W at the opposite-impeller end radial magnetic bearing
during Levitation or Rotation mode (approximately 1/2 of the air gap space to the touchdown
bearing). The MBC ESD Fault contacts open. The MBC remains in Levitation mode with the
motor shaft levitated until commanded to de-levitate over serial comms or VSD DC buss
power depletes. This shutdown is released when displacement is less than 75 µm.
The MBC has measured synchronous speed (first harmonic) shaft vibration at the
impeller end radial magnetic bearing is greater than 60 µm from 0 to the peak amplitude
in Rotation mode. This condition is monitored only when the AVR and ABS filter is on,
which occurs for speed above 80 Hz. The MBC ESD Fault contacts open. The MBC
remains in Levitation mode with the motor shaft levitated until commanded to de-levitate
over serial comms or VSD DC buss power depletes. This warning is released when
vibration is less than 60 µm.
DESCRIPTION
FORM 160.78-O2
ISSUE DATE: 5/22/2017
JOHNSON CONTROLS