Alpha Technologies ECM - Manual (Page 43)

43 TM 744-862-C0-003 Rev.C
Engine Control Module (ECM)
5.2 System Maintenance
The ECM monitors time between periodic maintenance of the engine-
generator. The Service Interval internal ECM variable represents the number
of hours of engine-run-time between periodic services. When the engine runs
for a number of hours equal to Service Interval, the ECM sets the Service
Required Alarm and turns on the amber notification LED. The default value of
Service Interval is 100 hours but may be programmed from 0 to 250.
Service Due represents the number of engine run time hours before the
next periodic maintenance will be required. Pressing and holding the service-
reset switch for 5 seconds resets the service counter and Service Due is
updated with the current value of the service interval.
An exception to the standard Service Interval occurs when the engine is
new. At 25 hours of Engine Run Time, the ECM will set the Service Required
flag. 25 hours represents the break-in period of the engine, which should be
serviced at this point. Note that if a service-reset is performed before the
Engine Run Time counter reaches 20 hours, the Service Required flag will still
be set at 25 hours. If, on the other hand, a service-reset is issued when the
engine has run for more than 20 hours, the Service Countdown will be set to
Service Interval.
NOTE: 5.0kW APUs are shipped with synthetic oil which does not
require changing after the initial 25 operational hours. The oil
should be changed after each 72- to 100-hour period of
continuous operation in accordance with the generator
manufacturer’s owners manual. Exact times will vary as a
function of temperature and operating conditions.