Alpha Technologies XM2-300CE-HP - Manual (Page 50)

4. 0 Operation, continued
4.7 Automatic Performance Test
Automatic Self-Test: The XM2-300HP can periodically perform an automatic self test
to verify the state of the battery and the inverter circuitry. The automatic test feature has
several programmable parameters that determine the frequency and duration of automatic
tests. In addition to automatic testing, you can manually put the XM2-300HP into test mode
by pressing ENTER and DOWN simultaneously. A running test may be halted manually by
pressing ENTER and DOWN a second time.
The test sequence process:
Begins with a check to verify that battery is attached and the battery switch is OFF. If the •
battery is discharged or not connected, the XM2-300HP does not attempt to operate in
inverter mode, preventing a drop of the load.
Next, the XM2-300HP switches to standby mode for a pre-programmed period.
•
Successful completion of a test sequence indicates the XM2-300HP is operating normally
in standby mode, the battery voltage did not drop below a preset threshold, and the
output was stable throughout the test. Failure of test is indicated by a Self Test Fail alarm,
which can be cleared by subsequently running a successful test for at least one minute.
Test Control: You can initiate a manual test (or a running test may be halted) at any time
by pressing ENTER and DOWN simultaneously or by changing the Self Test switch via the
front panel interface or status communications. You can also start a self test via the status
monitoring card.
To prevent an automatic test scheduled to occur in the next week, issue a Test Inhibit
command. This command is useful if periodic maintenance of the power supply is scheduled
close to the next scheduled automatic test.
This control feature may also be used when inclement weather is expected that might cause
a utility failure. The Test Inhibit command only affects an automatic test scheduled to run
in the next seven days. Multiple issues of the Test Inhibit command result in the deferral of
the next automatic test until at least seven days after the last request. This command has
no affect if an automatic test is not scheduled to take place in the next week. Starting a test
manually overrides the Test Inhibit command.
The automatic test feature is on by default. To turn auto-test off, change Test Interval to 0
days in the Setup Menu. Auto-test may be enabled at any time by changing the test interval
to any numerical value (excluding “0”). The default test interval is 30 days.
Test Countdown: Indicates a pending automatic test.
Test Duration: The Test Duration is adjustable to meet customer requirements. Exercise
caution when increasing the parameter because long self tests compromise the standby
capability during, and shortly after, the test.
Standby Time and Standby Events: Counters that are not incremented during XM2-300HP
self tests.
50 017-877-B1-001 Rev. A