INTRODUCTION
I-E96-506B1 4 - 1
SECTION 4 - OPERATING PROCEDURES
INTRODUCTION
This section contains information regarding modular power
system operation. This section includes information on status
LEDS for the AC transfer, bus monitor and power modules. It
explains how to start up the power module and how to remove
it during operation.
NOTE:
The modular power system requires no user calibration; all
components are factory calibrated.
LED INDICATORS
When the modular power system is operating, observe the sta-
tus LEDs. The following paragraphs explain how to interpret
these LEDs. Also, refer to Tables 4-1 and 4-2.
AC Transfer Module
The AC transfer module (IEPEP03 Power Entry Panel only) has
three status LEDs: a module status LED, line one and line two
AC input status LEDs. All LEDs are red/green LEDs. When the
system is receiving power and operating normally, the module
status LED is green. Also, the line one and two AC input status
LEDs are green under normal operation. The only time the
module status LED turns red is if the module fails. A failure
means that the internally generated supply voltages or refer-
ences have fallen below the minimum acceptable level. In a
redundant supply line configuration, a failure in the primary
input turns line one AC input status LED red; a failure in the
secondary input turns line two AC input status LED red. Refer
to Table 4-1 for a listing of status LED conditions.
Bus Monitor Module
The bus monitor module has two LEDs: module status and
system status. The module status LED is green when the mod-
ule is operating properly. It turns red if the module fails. A fail-
ure means that the internally generated supply voltages or
references have fallen below the minimum acceptable level.
The system status LED is green when everything in the system
is satisfactory (refer to Table 4-1). If for some reason a bus volt-
age fails or falls out of tolerance, one of the AC inputs fails,
external status, auxiliary power supply inputs are low, or the
AC transfer module (ATM) fails, the LED turns red.
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