FRONT PANEL
2.1
APM (Automatic Performance Monitor) Status Block
On units equipped with an optional APM logic upgrade, the XM Series power module
automatically self-tests the batteries and inverter. The duration and intervals are user
programmable (see section 6.10). If a failure is detected during self-test, either the red
"CHECK BATTERIES" or red "CHECK INVERTER" LEDs in the APM status block will
flash to indicate the circuit that has failed. At the same time, the external LRI option on
the enclosure will flash to signal that maintenance is required. The APM self-test feature
is a great aid when trouble-shooting the power supply and can be manually activated by
pressing the "TEST/RESET" switch. The yellow "TEST IN PROGRESS" LED will light as
the power supply transfers into self-test mode. The red "STANDBY POWER" LED in the
SYSTEM STATUS block will come ON to indicate that the power supply is in inverter
operation. Since self-test only simulates an outage, the green "LINE POWER" LED will
remain ON, indicating that utility power is still available. If a fault is detected, the power
supply will transfer back to line power without interruption to the output.
2.1.1
"TEST/RESET" Switch
The "TEST/RESET" switch is standard on all XM Series power modules, but functional
only on units equipped with APM or USM logic upgrades. It is used to manually cycle the
power supply in and out of self-test mode, and to reset alarms. If a fault is detected during
the APM self-test mode, the "TEST/RESET" switch resets the enclosure’s flashing LRI
(Local and Remote Indicator) and the SSR (Standby Status Relay) alarms; however, the
red "CHECK BATTERIES" and "CHECK INVERTER" LEDs cannot be reset until the fault
is corrected.
2.1.2
"NOT INSTALLED" (green) LED
On units not equipped with an APM logic upgrade, the green "NOT INSTALLED" LED
will light whenever the "TEST/RESET" switch is pressed.
2.1.3
"TEST IN PROGRESS" (yellow) LED
The yellow "TEST IN PROGRESS" LED indicates that the power supply is in self-test
mode.
2.1.4
"CHECK BATTERIES" (red) LED
If the red "CHECK BATTERIES" LED is flashing, it indicates that one or more of the
batteries are unable to carry the load and that maintenance is required. The flashing LED
cannot be reset until the fault is corrected. NOTE: Under this condition, the power supply
will not be able to support inverter operation.
2.1.5
"CHECK INVERTER" (red) LED
If the red "CHECK INVERTER" LED is flashing, it indicates that the inverter has failed
to produce AC and that maintenance is required. The flashing LED cannot be reset until
the fault is corrected. NOTE: Under this condition, the power supply will not be able to
support inverter operation.
2. FRONT PANEL
7
APM (Automatic Performance Monitor) Status Block
"TEST/RESET" Switch
(Manually initiates self-test; resets alarm)
"NOT INSTALLED" (green) LED
(Illuminates if TEST/RESET switch is pressed
with APM option not installed)
"TEST IN PROGRESS" (yellow) LED
(Indicates self-test mode)
"CHECK BATTERIES" (red) LED
(Indicates battery failure)
"CHECK INVERTER" (red) LED
(Indicates inverter failure)
(OPTIONAL FEATURE)
