52 TP-7044 6/23
2.14.4 System Fault Shutdown Lamp with Digital Displays
The system FAULT lamp glows red, the alarm horn sounds, and the unit shuts down to indicate a fault shutdown under the
following conditions. See the Controller Resetting (Following System Shutdown or Warning) section, Controller Resetting
procedure, for information on resetting a system shutdown.
Note:
Always identify and correct the cause of a fault shutdown before resetting the controller.
When the system shutdown lamp is on and no message displays, rotate the dial to the Active Events menu. Press the dial to
view messages. Rotate the dial to view additional messages. Press the OFF button to return to the main menu.
Use the Alarm Off button to silence the alarm horn at the operator’s discretion. If the controller is setup for an NFPA 110
application, press the AUTO button before silencing the alarm horn. The alarm horn cannot be silenced unless the button is in
the AUTO mode. See Status and Notice Digital Displays for more information.
AC Sensing Lost (controller in AUTO and voltage was previously present). The fault lamp illuminates red, the alarm horn
sounds, and the unit shuts down when the controller does not detect the nominal generator set AC output voltage for more than
3 seconds after crank disconnect.
Alternator Protection. The fault lamp illuminates red and the unit shuts down because of an alternator overload or short circuit.
Auxiliary Input (Shutdown). The fault lamp illuminates red, the alarm horn sounds, and the unit shuts down when an auxiliary
digital or analog inputs signals the controller. The digital inputs do not function during the first 30 seconds after startup. Use
SiteTech™ software to define inputs as shutdowns or warnings.
Common Fault. The fault lamp illuminates red, the alarm horn sounds, and the unit shuts down when the controller is signaled
by a common fault. Use SiteTech™ software to activate the common fault shutdown. The common fault comprises of any
combination of the fault shutdowns under a single alert.
Coolant Temperature Open Circuit. The fault lamp illuminates red, the alarm horn sounds, and the unit shuts down when the
engine coolant temperature sender circuit is open.
ECM Communications Loss. The fault lamp illuminates red, the alarm horn sounds, and the unit shuts down when the ECM
communication link is disrupted.
ECM Diagnostics (Multiple Engine Inputs). The fault lamp illuminates red, the alarm horn sounds, and the unit shuts down
when ECM diagnostics signals the controller. The specific display (xxxxx) will be a brief message or fault code that is engine
manufacturer dependant. The engine literature provides the fault code description and further information.
ECM Model Mismatch. The fault lamp illuminates red, the alarm horn sounds, and the unit shuts down when the controller
detects an error with the ECM model.
Electrical Metering Communication Loss. The fault lamp illuminates red, the alarm horn sounds, and the unit shuts down
when the metering to the controller communication link is disrupted.
Emergency Stop. The fault lamp illuminates red, the alarm horn sounds, and the unit shuts down when the local or optional
remote emergency stop switch activates.
Fuel Tank Leak. The fault lamp illuminates red, the alarm horn sounds, and the unit shuts down when the fuel tank signals a
leak of the inner tank. This fault requires an optional fuel tank leak switch for the lamp to function.
Generator Total Real Power High. The fault lamp illuminates red, the alarm horn sounds, and the unit shuts down when the
generator set supplies more than 102% of the rated standby output kW (or 112% of the rated prime power output kW) for more
than 60 seconds.
High Coolant Temperature. The fault lamp illuminates red, the alarm horn sounds, and the unit shuts down because of high
engine coolant temperature. The high coolant temperature shutdown does not function during the preset inhibit time delay period
after startup.
Note:
The high engine temperature shutdown function and the low coolant level shutdown function are independent. A low coolant
level condition may not activate the high engine temperature switch.
High Engine Speed. The fault lamp illuminates red, the alarm horn sounds, and the unit shuts down immediately when the
governed frequency on 50 and 60 Hz models exceeds the over speed setting.
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