User Manual

1 Publicatio n 1000-UM001B-US-P - July 20 00
Chapter 5
Troubleshooting Guide
Troub leshooting Guide
Table 5.A SLS Box
Problem Component Possible Cause Check Suggested Action Repairable?
•
Low voltage on
sec ondary
•
Low voltage on
primary
Control
transformer
Loose
connections,
System voltage
Prim ar y wired f or prop er
voltage
Replace if nothing suspicious
found.
No
High voltage on
secondary
Primary wi red
wrong
Voltage on input Replace if nothing suspicious
found.
No
Blown fuse
indicated
Primary f uses Overload or short
in CCT
For c orrec t w iring or
fault in control circuit
Rep lace CCT if necessary and
install correct size fuse as
shown on the wiring diagram.
—
Blown fuse
indicated
Secondary f use Overload or short
in CCT
For c orrec t w iring or
fault in control circuit
Rep lace CCT if necessary and
install correct size fuse as
shown on the wiring diagram.
—
Low DC voltage on
load side
Pow er supp ly Overload, low
vo ltag e on AC
side
Ad just outp ut vo ltag e,
Check CCT voltage
output.
Rep lace 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 ci rcuit — —
Fo r ei g n ma terial
jam
— Replace entire assembled
contactor.
No
Does not drop out Welded contact
or fore i gn
material jam
Coil voltage must be
zero.
Replace entire assembled
contactor.
No
Con tinuity or
non-operation
Auxili ary contacts — Resistance of contacts
with wires removed
Auxiliary contacts are locked
on the conta c to r replace entire
assembled device.
No
Sa fety c on tacts
betw een termi nal
#13 and #14 will
not close and there
is no voltage on
load side of
co nt actor an d I C
auxi lia ry is closed
VSR Bad relay Refer to VSR literature
and LEDs on front of
VSR for status .
Replace VS R. No