Advertisement
WIRING DIAGRAM 840-T Series
TROUBLESHOOTING GUIDE
PROBLEM
A. No displays or indicators lit.
B. Absence of Audio Alarm.
C. Unit will not enter program
mode.
D. Unit enters program mode.
but cannot change times.
E. Unable to start, stop, or store
timer presets in program mode.
Missing or abnormal characters
in displays.
Printed in USA 3/06 © 2006
CAUSE
Unit unplugged.
Store's circuit breaker blown.
Defective transformer.
Circuit inoperable.
Speaker inoperable.
Circuit inoperable.
All channels are still counting.
Logo Switch inoperable.
The channel is still counting.
Arrow Switch inoperable.
Circuit Inoperable
Circuit inoperable.
6
SOLUTION
Plug unit in.
Reset breaker.
Replace Main Circuit Board.
Replace Main Circuit Board.
Replace Speaker.
Replace Main Circuit Board.
Wait until channels are in stop
mode.
Replace Switch Panel.
Wait until channel is in stop mode.
Replace Switch Panel.
Replace Main Circuit Board.
Replace Switch Panel. If
problem persists, replace Main
Circuit Board.
840-508revA
Advertisement
