York YK-EP, Operation And Maintenance Manual

Page: 108 / 268

Medium Voltage Variable Speed Drive (MVVSD) screen
Figure 39: Medium Voltage Variable Speed Drive screen
This screen displays information pertaining to a Medium Voltage Variable Speed Drive (MVVSD).
For details of MVVSD operation and setpoints, refer to Medium Voltage Variable Speed Drive – Service
(Form 160.00-M6) .
Table 106: Display only
Field/LED name Description
Motor Run (LED)
Indicates whether the digital output from the controls is
commanding the chiller to run.
Motor Heater (LED) Indicates whether the optional Motor Heater is ON or OFF.
Motor Current % Full Load
Amps
Displays the motor current as a percentage of the Full Load Amps
(FLA).
Current Limit Setpoint
Displays the current limit value in use. This value could come from
a 0 to 20mA, 4 to 20mA, 0 to 10VDC or 2 to 10VDC input in Analog
Remote mode, PWM signal in Digital Remote mode, E-Link or SC-
EQ communications interface in ISN mode or a locally programmed
value.
Pulldown Demand Time Left Displays the time remaining in the programmed pulldown period if
the value is not zero.
Input Voltage
Displays the average of the 3-phase input voltage to the MVVSD.
Value is provided by the MVVSD.
Output Voltage
Displays the output voltage to the motor. Value is provided by the
MVVSD.
Output Frequency
Displays the present output frequency to the motor. Value is
provided by the MVVSD.
YK-EP Style B Centrifugal Chiller 108