Alpha Technologies ECM - Manual (Page 24)

24
TM 744-862-C0-003 Rev.C
Engine Control Module (ECM)
8
7
The service reset push-button is also used to obtain information about
active alarms. The Major and Minor alarm LEDs are very general and a
technician will need more detailed information upon arrival to the site of an
alarming ECM. To retrieve details about an active alarm, the user presses and
releases the service-reset switch. An active alarm (Major or Minor) will be
indicated by the LEDs as indicated in Figure 3-1. Note that depressing the
service-reset switch for 5 seconds will cause the service timer to clear
possibly disrupting the preventive maintenance schedule. When the service-
reset button is pressed again, the LEDs will represent the next active alarm.
Pressing the button when there are no more active alarms will reset the LEDs
to their normal usage. Several quick flashes of all five LEDs will indicate end of
the alarm list before the LEDs return to normal operation. If the service reset
button is not depressed again when an alarm is indicated, the LEDs will return
to normal operation after 30 seconds have elapsed. Resetting alarms via
status monitoring or via the manual stop switch will also clear the alarm
pattern indicated by the LEDs.
2.2 Control Functions, continued
RUN
AUTO
STOP
SRVC
RESET
Fig. 2-2, Run/Auto/Stop and Service/Reset switches