GE Industrial Solutions GE ZENITH SERIES MDU - Manual (Page 26)

System Monitoring
GE Z ENITH C ONTROLS
MDU Owner’s Manual
601 S HILOH R OAD January 2013
Plano, TX 75074 Page 26
4.1.3. Control Functions
The control and monitoring functions are maintained as separate circuits to prevent a
monitor malfunction from affecting equipment operation. Only excessively high
temperature in the transformer will automatically shut down the MDU system. If your MDU
is equipped with any other internal automatic shutdown system, it will be a separate
device located in the monitor tray area.
Note: GE strongly advises against any other automatic shutdown devises except
remote EPO functions.
Computer room air handling/conditioning equipment may be connected to the control
interface board (contractor board) for automatic shutdown of this equipment during
emergencies.
The emergency power off push-button and/or remote emergency power off switches will
cause the unit to shut down.
1. Emergency Power Off
A guarded and illuminated EPO push-button is interfaced to the shunt trip mechanism
of the main circuit breaker. Activation of this momentary contact push-button causes
the main circuit breaker to trip, thus removing all connected loads from the electrical
service.
2. LED Indicator
A simple red light/green light display is provided for non-technical personnel. Any
monitored parameter outside of the threshold limits will illuminate a red light above
the display for identification of the fault condition. When all parameters are nominal, a
green light will illuminate.
3. Horn
The display has a horn that will sound if an alarm is present. The horn can be enabled
and disabled in the setup options.
4. LCD Display Panel
The LCD panel displays all analog inputs, digital inputs, calculated points, and alarm
indications. The LCD provides alpha-numeric display capabilities to insure correct
interpretation of the unit’s monitoring functions.
5. Front Panel Buttons
The front panel has (6) six buttons that allow navigation through the different screens
on the display. Pressing any button will turn the backlight on. After the backlight is on,
you can use them to navigate through the screens.