Johnson Controls York MV VSD Operation Manual page 28

System architecture
Graphical LCD: Displays user information in text and numerical form.
Local/Remote LED: This green LED is illuminated when in local mode, and extinguished while in remote mode.
The display/keypad must be left in the remote mode for normal MV VSD operation.
Status LED:
• Not illuminated: not ready and not running
• Green LED only: ready and not running
• Red LED only: ready and running
• Fast blinking red LED: Fault
• Slow red LED if running, slow green if not running: alarm
• Alternating red and green LED when ready or running
• Test Mode
Local/remote key: Toggles between local and remote mode while the drive is not running. Press and hold the key
for 2 s to toggle between modes.
Run key: Initiates a start command when the VSD is in local mode, and the display screen is in the main tab.
Escape key: This multi-function Escape key allows the user to cancel changes made to a programming field if
pressed, while the field is selected (highlighted), returns the user to the previous level of the menu tree, and cycles
through the display tabs.
Stop key: This initiates a stop request when operating in local mode, and is functional in all screens. When double-
pressed within 1.5 s, it initiates a (gate block) coast to stop. This function always works. The drive must reset after a
double-press stop.
Mode key: This key cycles through tabs. The key also selects the digits to be changed by the encode when
changing parameters.
4 digit 7 segment display: Displays the frequency of the running motor.
Encoder: This multi-functional device scrolls up and down a menu listing, increments/decrements the data in a
selected programming parameter field, and functions as the enter key when pressed.
Commissioning Tool Port: This Ethernet port is used for communication to the commissioning and support tool.
Reset pushbutton: This pushbutton is used to clear inverter faults and alarms displayed on the LCD.
Interlock pushbutton: This pushbutton is used to disable the inverter via a hard-wired circuit. The pushbutton
is illuminated while the inverter is interlocked, and extinguished for normal operation. Operating the interlock
pushbutton results in an inverter gate driver block and free-run deceleration of the load.
28 Medium Voltage Variable Speed Drive Operation Guide
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