Alpha Technologies AlphaGen PN-6x-T 7.5kW 48VDC - Installation and Operation Manual - Manual (Page 52)

52 745-020-B0-003, Rev. C
4.0 The Engine Control Module, continued
4.11 ECM Self-test, continued
The following programmable, internal ECM variables control automatic self-tests.
• Autotest Interval: This feature represents the number of days between automatic tests.
Programming this variable to 0 disables the automatic test feature.
• Autotest Countdown: This countdown timer is monitored by the ECM to determine
when the next automatic test is due. Although the timer is normally used as a status
indicator, it can be used to set the start time for the next autotest. For example, if you
want to start the automatic test sequence at 2:30pm and it is presently 12:30pm, program
the Autotest Countdown to 2 hours. Subsequent tests will begin at the same time of
day as long as the ECM doesn’t lose power. The ECM resets the Autotest Countdown
whenever the Autotest interval is changed. Thus, if the Autotest Interval is changed to 10
days, the ECM will set the Autotest Countdown to 240 hours.
• Autotest Duration: The length of each Autotest is measured in minutes. The default test
duration is 10 minutes. The test duration may be set between 10 and 120 minutes.
Manually Enabling the Autotest Feature:
Use SW5-8 to enable the Autotest feature with a 14-day test interval. The fi rst autotest will
begin 14 days from the time the ECM is powered up with the confi guration switch changed
from 0 to 1 (OFF to ON). To disable the autotest sequence, put SW5-8 in the OFF position
and restart the ECM. On power up, the ECM looks for a change in the switch position before
it changes the test control parameters.
Follow the procedure below to set a self-test for a specifi c time of day. This procedure
assumes you are not using a Telecom Power Monitor (TPM), and SW5-8 was ON.
1. Go to the site on the day of the week and time of day you want the self-test to occur.
2. Disconnect and remove the ECM.
3. Turn OFF SW5-8.
4. Install and re-power the ECM briefl y (15 second minimum powerup time). If AC is
present, this can be done by connecting J6 (AC line, the 2-position mate-n-lock plug at
the bottom of the ECM).
5. Disconnect and remove the ECM (again).
6. Turn ON SW5-8.
7. Reinstall the ECM with all connectors.
The self-test will occur 14 days from the time the ECM is powered.
4.12 Maintenance Functions
The ECM monitors time between periodic maintenance of the engine-generator. The Service
Interval is the number of hours of engine runtime between servicing. When the engine runs
for a number of hours equal to Service Interval, the ECM activates the Service Required
notifi cation and turns on the amber notifi cation LED. The default value of Service Interval is
100 hours, and can be programmed from 0 to 250.
Service Due represents the number of engine runtime hours before the next periodic
maintenance is required. Pressing and holding the Service Reset switch for fi ve seconds
resets the service counter and it is updated with the current value of the service interval.