York YD Mod D, Operation Manual, Page: 80 / 160

Medium voltage variable speed drive screen
Figure 29: Medium voltage variable speed drive screen
This screen displays information about the medium voltage variable speed drive (MVVSD), if
installed. There are two similar screens available: one for VSD 1 and another for VSD 2.
Table 69: Display only fields
Field/LED name Description
PRV position Displays the Pre-rotation Vane position as a value between 0 and 100%.
Motor run (LED)
Indicates whether the digital output from the controls is commanding the motor to
RUN.
Motor heater (LED)
Indicates whether the digital output from the controls is commanding the optional
motor heater on. This LED is not displayed if the option is not installed.
% Full Load Amps Displays the motor current as a percentage of the Full Load Amps (FLA) value.
Pulldown demand time left
Displays the time remaining in the programmed pulldown period if the value is
nonzero.
Output voltage Displays the output voltage measured to the motor.
Output frequency Displays the present output frequency to the motor.
Input power Displays the total kilowatts measured by the VSD or Harmonic Filter, if installed.
KW hours
Displays the cumulative amount of kilowatts used over time as the MVVSD motor
controller operates.
Input voltage Displays the input voltage to the MVVSD as reported by the MVVSD.
Output current
Displays the average of the 3-phase output current to the motor. Value is provided by
the MVVSD.
DC bus voltage (phase A, B, C) Displays the three phases of DC bus voltage upper and lower buses.
MVVSD model Displays the model number as received from the MVVSD.
Motor voltage rating
Displays the voltage rating of the MVVSD as received from the MVVSD. Displayed as
2300 V, 3300 V, or 4160 V. If an invalid value is received, INVALID is displayed and the
chiller will not run.
Model YD Mod D with OptiView Control Center 80