Alpha Technologies ECM - Manual (Page 41)

41 TM 744-862-C0-003 Rev.C
Engine Control Module (ECM)
5.1 Self-Test
Generator testing can be initiated in four ways:
1. The ECM can be programmed to periodically run an automatic test
(Default OFF).
2. A Self-Test can be commanded via status communications.
3. Momentary activation of the Engine Run command will cause the
ECM to effectively run a test. Note that this method is the least
desirable because the Self-Test Fail alarm will not be set if an
alarm condition arises.
4. A one-minute automatic test is performed when the manual control
switch is returned to Auto from Stop.
Generator testing consists of starting and running the generator for a
programmable period of time (the default test duration is 10 minutes). 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
asserted, or the engine is already running.
Section 5, System Self-test and Maintenance