WIRING DIAGRAM 840-T Series
6
A . No displays or indicators lit.
Unit unplugged.
Plug unit in.
Store's circuit breaker blown.
Reset breaker.
Defective transformer.
Replace Main Circuit Board.
Circuit inoperable.
Replace Main Circuit Board.
B. Absence of Audio Alarm.
Speaker inoperable.
Replace Speaker.
Circuit inoperable.
Replace Main Circuit Board.
C. Unit will not enter program
All channels are still counting.
Wait until channels are in stop
mode.
mode.
Logo Switch inoperable.
Replace Switch Panel.
D. Unit enters program mode.
The channel is still counting.
Wait until channel is in stop mode.
but cannot change times.
Arrow Switch inoperable.
Replace Switch Panel.
Circuit Inoperable
Replace Main Circuit Board.
E. Unable to start, stop, or store
Circuit inoperable.
Replace Switch Panel. If
timer presets in program mode.
problem persists, replace Main
Missing or abnormal characters
Circuit Board.
in displays.
CAUSE
SOLUTION
PROBLEM
TROUBLESHOOTING GUIDE
Printed in USA
4
/0
7
© 200
7
840-507rev
C
