Rockwell Automation 1000 Safety Lockout System - Manual (Page 25)

1 Publication 1000-UM001B-US-P - July 2000
Chapter
5
Troubleshooting Guide
Troubleshooting Guide
Table 5.A SLS Box
Problem Component Possible Cause Check Suggested Action Repairable?
•
Low voltage on
secondary
•
Low voltage on
primary
Control
transformer Loose
connections,
System voltage Primary wired for proper
voltage Replace if nothing suspicious
found. No
High voltage on
secondary Primary wired
wrong Voltage on input Replace if nothing suspicious
found. No
Blown fuse
indicated Primary fuses Overload or short
in CCT For correct wiring or
fault in control circuit Replace CCT if necessary and
install correct size fuse as
shown on the wiring diagram. —
Blown fuse
indicated Secondary fuse Overload or short
in CCT For correct wiring or
fault in control circuit Replace CCT if necessary and
install correct size fuse as
shown on the wiring diagram. —
Low DC voltage on
load side Power supply Overload, low
voltage on AC
side Adjust output voltage,
Check CCT voltage
output. Replace if defective. No
Does not pick up Contactor Low voltage Control voltage — —
Open coil Flash light coil Replace entire assembled
contactor. No
Open in coil
circuit Entire coil circuit — —
Foreign material
jam — Replace entire assembled
contactor. No
Does not drop out Welded contact
or foreign
material jam Coil voltage must be
zero. Replace entire assembled
contactor. No
Continuity or
non-operation Auxiliary contacts — Resistance of contacts
with wires removed Auxiliary contacts are locked
on the contactor replace entire
assembled device. No
Safety contacts
between terminal
#13 and #14 will
not close and there
is no voltage on
load side of
contactor and IC
auxiliary is closed VSR Bad relay Refer to VSR literature
and LEDs on front of
VSR for status. Replace VSR. No