General Information
16 MGG100M Operating Manual 36833 C
Emergency Stop Switch
Equipment Damage. The emergency stop switch is not to be used to power-down the unit
under normal operating circumstances. Doing so will result in equipment damage. (000246)
The unit is equipped with two red emergency stop switches, both labeled EMERGENCY STOP. See Figure 6 for
locations. Activating emergency stop results in the following.
• MLCB shuts off, opening the contact and disconnecting the load to the connection lugs.
• Fuel circuit opens, shutting down the engine.
• Controller posts an EMERGENCY STOP shutdown alarm. See Shutdown Alarms for more information.
• The switch remains active until it is pulled out.
Common Alarm Horn
The common alarm horn sounds when an alarm or warning condition is active. When the horn sounds, the controller
displays a corresponding message on the System Alarm and Warning page (Figure 16). Conditions that cause the
alarm horn to sound are as follows.
• Digital output function #1, COMMON ALARM, activates under alarm conditions
• Digital output function #2, COMMON WARNING, activates under warning conditions
Note: DTC faults do not activate the alarm horn. See Unit Alarms and Warnings for more information.
Key Switch
The key switch is a manually operated, three-position key switch. The positions are AUTO, OFF, and MAN.
Note: This unit is intended for applications that utilize the MAN key-switch position. See Equipment Description for
more information.
• AUTO:
• For use if unit is used as back-up to utility power. (Unit must be connected to an automatic transfer switch.)
• If unit is connected to an automatic transfer switch, unit starts when the transfer switch senses loss or
reduction of available utility power.
• If unit is not connected to an automatic transfer switch, unit automatically starts.
• Unit starts when internal exercise is enabled and the internal exercise cycle is due.
• When the condition that caused the unit to start in AUTO mode ceases to exist, the unit runs a cool-down
cycle and then shuts off.
• OFF: Immediately shuts off the unit and/or prevents it from starting automatically.
• MAN: Indicates manual. Immediately starts the unit.
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