Maintenance; Troubleshooting - Syntron Material Handling Conductor 420 Service Instructions Manual

MAINTENANCE

WARNING: Disconnect and lock out the power supply at the safety disconnect switch before performing any maintenance
work.
The only maintenance required is that the control be kept reasonably clean.
WARNING: Do not use water or a damp cloth for cleaning. Clean, dry compressed air is recommended.

TROUBLESHOOTING

PROBLEM
No output from control
Feeder hums or does not
move parts
Maximum output with no
main pot control
Output speed won't
change or changes erratic
9
CAUSE
Brief utility power
interruption
No AC line voltage
No AC voltage on TB1
Contacts or jumper missing at
TB2 between 6 and 7
MAX pot turned full counter-
clockwise
Thyristor is shorted (RC)
Brief utility power
interruption
SCR is shorted (RC)
MAX trim pot incorrectly
adjusted
Pot cable is unplugged
Lack of shielded cable for
"main" control pot
Damaged main pot

Turn control off for 5 seconds, then restart; if
problem persists, call Syntron Material Handling.

Establish input power

Check fuse and switch

Close contacts or install jumper

Change switch position

Turn pot clockwise

No 5 to 30 VDC signal to terminals #11 & 12 if
jumper is across terminals 5 & 6

Replace Thyristor

Turn control off for 5 seconds, then restart; if
problem persists, call Syntron Material Handling.

Replace Thyristor
 Signal to terminal 8 & 9 at 20 mA
 Adjust correctly

Connect pot cable

Ensure shielded cable is run separate from main
conduit. (Never run shielded cable with AC power
lines.)

Replace main pot
SOLUTION