System Fault Shutdown Lamp With Digital Displays - Kohler APM402 Operation

Speed Sensor Fault. The fault lamp illuminates yellow and the alarm horn sounds when the speed signal is absent for one
second while the generator set runs. The local display shows Spd Sens Flt Warning.
2.4.6

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 section titled: Controller Resetting procedure, for information on resetting a system shutdown.
Use the Alarm Off button to silence the alarm horn at the operator's discretion.
If the controller is set up for an NFPA 110 application, press the AUTO button before silencing the alarm horn. The alarm horn
cannot be silenced unless the master control button is in the AUTO mode. See the section titled: Status and Notice Digital
Displays for more information.
Note:
Text shown in italics in this section of the manual represents digital display messages.
AC Sensing Loss. 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. The controller displays AC
Sens Loss Shutdwn.
Alternator Protection. The fault lamp illuminates red and the unit shuts down because of an alternator overload or short circuit.
The local display shows Alt Protect Shutdwn. See Appendix titled: Alternator Protection for more information.
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 first the 30 seconds after startup. Use
SiteTech™ software to define inputs as shutdowns or warnings. The local display shows Aux Input Shutdwn.
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 local display shows Common Fault
Shutdwn. The common fault comprises the following shutdowns under a single alert.

Emergency stop

Engine over speed

High coolant temperature

Low oil pressure

Overcrank
ECM Address Conflict. The fault lamp illuminates red, the alarm horn sounds, and the unit shuts down when the controller
detects an error with the ECM address. The local display shows ECMAddr Err Shutdwn.
ECM Communications Loss. The fault lamp illuminates red, the alarm horn sounds, and the unit shuts down when the ECM
communication link is disrupted. The local display shows ECM Comm Err Shutdwn.
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 local display shows ECM xxxxx Shutdwn. The specific display (xxxxx) will be
a brief message or fault code that is engine manufacturer dependent. 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. The local display shows ECM Mismatch Shutdwn.
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. The local display shows Emerg Stop Shutdwn.
Enclosure Temperature: High Shutdown (Available on select Telecom units only). The fault lamp illuminates red, the alarm
horn sounds, and the unit shuts down when the enclosure reaches high temperature. The digital input does not function during
first the 20 seconds after startup and has a 5 second delay. The local display shows Enclsr Temp: High Shutdwn.
Engine Over 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. The local display shows Eng Speed High Shutdwn.
TP-6694 9/20 49