Chapter 6 - Maintenance
50
Adept PA-4 Power Chassis User’s Guide, Rev E
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
LED
s that can be viewed through the front grill. The functions for these LEDs are shown in
Table 6-1
. These
LED
s 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
H
V
O
N
This STATUS LED lights approximately 2.5 seconds after
high-power relays are energized.
2
Green
L
V
O
N
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. The LED will reset when PA-4 power is
turned off and on.
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.
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