York OPTIVIEW Operation Manual page 38

SECTION 2 - OPTIVIEW CONTROL CENTER INTRODUCTION
W24 Position
Displays the shaft position in micrometers from center
along the radial axis designated "W" for the Opposite
Impeller End Bearing.
W2 (Current)
Displays the magnetizing current to the upper bearing
on the radial axis designated "W" for the Opposite Im-
peller End.
W4 (Current)
Displays the magnetizing current to the lower bearing
on the radial axis designated "W" for the Opposite Im-
peller End.
V2 (Current)
Displays the magnetizing current to the upper bearing
on the radial axis designated "V" for the Opposite Im-
peller End.
V4 (Current)
Displays the magnetizing current to the lower bearing
on the radial axis designated "V" for the Opposite Im-
peller End.
Z2 (Current)
Displays the magnetizing current to the axial bearing at
the Opposite Impeller End.
MBC Control Mode
Displays whether the MBC is in Manual or Automatic
Control.
[MBC Status] Delevitated Mode (LED)
Indicates the MBC is reporting itself in Delevitated sta-
tus via Modbus Data.
[MBC Status] Levitated Mode (LED)
Indicates the MBC is reporting itself in Levitated status
via Modbus Data.
[MBC Status] Rotation Mode (LED)
Indicates the MBC is reporting itself in Rotation mode
via Modbus Data.
[MBC Status] MBC Shutdown (LED)
Indicates the MBC is reporting a shutdown fault via
Modbus Data.
[MBC Outputs] Rotation Allowed (LED)
Indicates the MBC rotation allowed contacts are closed
by the control Digital Input.
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[MBC Outputs] MBC Fault (LED)
Indicates the MBC fault contacts are opened, indicat-
ing a fault, by the control Digital Input.
Motor Speed
Indicates the compressor motor rotational speed.
DC Bus Voltage
Indicates voltage of the DC Bus, which supplies the
MBC.
Rotor Elongation
Indicates the thermal growth of the motor shaft as de-
termined by the difference in the impeller end position
sensor and the opposite impeller end position sensor.
Motor Housing Temperature
Indicates the motor housing temperature measured
from a thermistor inserted externally.
Landing Counter
Indicates the number of counts of events where shaft
displacement exceeded a gap threshold while rotating.
PROGRAMMABLE
Levitate/Delevitate
Access Level Required: SERVICE
Allows the technician to manually levitate or delevitate
the shaft when the MBC is powered by sufficient DC
Bus voltage. Sets the control mode to MANUAL.
Auto
Access Level Required: SERVICE
Returns MBC Control to Automatic as required to run
the chiller.
NAVIGATION
Home
Causes immediate return to the Home Screen.
Compressor
Causes immediate transfer to the Compressor Screen.
MBC Details
Moves to the subscreen showing additional detailed
MBC parameters.
MBC Event Log
Moves to the subscreen showing the MBC collection
of event history logs.
FORM 160.78-O2
ISSUE DATE: 5/22/2017
JOHNSON CONTROLS