User`s guide

Chapter 6 - Maintenance
48 Adept PA-4 Power Chassis User’s Guide, Rev D
6.4 PA-4 CAT-3 Power Chassis LED Functions
The labels on the lower-right corner of the front of the power chassis are for diagnostic
LEDs that can be viewed through the front grill. The functions for these LEDs are shown in
Table 6-1. These
LEDs are typically for Adept Field Service use only.
Figure 6-1. PA-4 Chassis LED Locations
Table 6-1. CAT-3 PA-4 Chassis LED Functions
LED # Color Label Function Description
1 Yellow HV ON This STATUS LED lights approximately 2.5 seconds after
high-power relays are energized.
2 Green LV ON This STATUS LED lights when +5 V logic power is present.
3 Red SC LS This FAULT LED lights when the lower-right mounting screw in
any of the four slots is loose. The fault will reset when the
screws are tightened.
4 Red K1-K2-F This FAULT LED lights when a failure has occurred during
cyclic testing of the dual-channel safety relays. The LED will
reset when PA-4 power is turned off and on.
5 Red IR ER This FAULT LED lights when an inrush error occurs while
enabling power. The error may indicate a fault in an amplifier or
control module
a
. The LED will reset when PA-4 power is
turned off and on.
a
The PA-4 supports the following control modules: MAI, sMAI, sDAI, and sEJI.
6 Red Q1DE This FAULT LED lights when an over-current error occurs. The
error may be caused by a severe power surge or a fault in an
amplifier or control module. The LED will reset when PA-4
power is turned off and on.