Johnson Controls YORK YMC2 User Manual

Table 23: Display only fields
Field/LED name Description
V24 Position
Displays the shaft position in micrometers from center along the radial
axis designated “V” for the Opposite Impeller End Bearing.
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 Impeller End.
W4 (Current)
Displays the magnetizing current to the lower bearing on the radial axis
designated “W” for the Opposite Impeller End.
V2 (Current)
Displays the magnetizing current to the upper bearing on the radial axis
designated “V” for the Opposite Impeller End.
V4 (Current)
Displays the magnetizing current to the lower bearing on the radial axis
designated “V” for the Opposite Impeller 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.
Command Displays the OptiView state command to the MBC
[MBC Status] Levitation
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
Alarm (LED)
Indicates the MBC is reporting a shutdown fault via Modbus Data.
[MBC Outputs] MBC
Alive (LED)
Indicates the MBC Alive allowed contacts are closed by the control Digital
Input.
[MBC Outputs]
Rotation Allowed (LED)
Indicates the MBC Rotation Allowed contacts are closed by the control
Digital Input.
[MBC Outputs] MBC
Fault (LED)
Indicates the MBC Fault Contacts are opened, indicating a fault, by the
control Digital Input.
Motor Speed Indicates the compressor motor rotational speed.
MBC Input Voltage Indicates voltage supply to the MBC.
Rotor Elongation
Indicates the thermal growth of the motor shaft as determined by the
difference in the low stage impeller end position sensor and the opposite
end position sensor.
Motor Housing
Temperature
Indicates the motor housing temperature measured from a thermistor
inserted in the motor housing.
Table 24: Navigation
Button Description
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.
YMC
2
Mod B with OptiView
™
Control Center
50

Johnson Controls YORK YMC2 Specifications

General

Brand	Johnson Controls
Model	YORK YMC2
Category	Chiller
Language	English