Alpha Technologies AlphaGen PN-6x-T 7.5kW 48VDC - Technical Manual - Manual (Page 67)

042-288-B0-001, Rev. A 67
4.0 The Engine Control Module, continued
4.10 ECM Self-test
Generator testing consists of starting and running the generator for a duration of 10 minutes.
Generator testing can be initiated two ways:
1. The ECM is confi gured to periodically run an automatic test.
2. A one-minute automatic test is performed when the manual control switch is returned to
Auto from Stop.
The ECM monitors all engine-related signals and will declare a self-test as failed if any of the
following alarms activate during the test:
• Low Oil Pressure
• Engine Over-temperature
• Engine Over-speed
• Engine Over-crank
• Low Fuel
• Alternator Over-voltage
• ECM Control Failure
• Alternator Not On
• Low Ignition Battery
• Low DC Bus Voltage
The ECM will not start a self-test if the engine is disabled, the stop switch is engaged, or the
engine is already running.
If the AC line fails during a test, the test will terminate normally, but the engine will continue to
run until line voltage returns. If the test fails because the DC Bus alarm activates, the test will
terminate. The Self-test Fail alarm becomes active and the generator runs until the DC Bus
alarm clears.
The Self-test Fail alarm may be cleared using a reset command, or by successfully running a
subsequent test.