7.2.3
APM (Automatic Performance Monitor) Status Block
On units equipped with an APM logic upgrade, the power module automatically self-
tests the batteries and inverter at pre-selected intervals. If a failure is detected, either the
red "CHECK BATTERIES" or red "CHECK INVERTER" LED in the APM status block will
flash to indicate the circuit (AC or DC) that has failed.
7.2.3.1 SELF-TEST Mode
The yellow "TEST IN PROGRESS" LED indicates that the unit is in self-test mode.
7.2.3.2 BATTERY FAILURE
Indicates that one or more of the batteries are unable to carry the load and that
maintenance is required. Under this condition, the power supply will not be able to support
inverter operation. (Refer to Maintenance 8.8.2).
7.2.3.3 INVERTER FAILURE
Indicates that the inverter has failed to produce AC and that maintenance is required.
Under this condition, the power supply will not be able to support inverter operation. (Refer
to Maintenance 8.8.3).
NOTE: If the enclosure’s external LRI lamp is flashing, indicating that the power supply
requires service, it can be cleared by pressing the "TEST/RESET" switch once; however,
the front panel LEDs, "CHECK BATTERIES" or "CHECK INVERTER", cannot be cleared
until the fault is corrected.
7. OPERATION
40
7.2
Identifying Modes of Operation,
continued
TEST IN PROGRESS
LED (yellow) ON
CHECK BATTERIES
LED (red) FLASHING
CHECK INVERTER
LED (red) FLASHING
