9
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
CAUSE
SOLUTION
No output from control
Brief utility power
interruption
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
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
Feeder hums or does not
move parts
Thyristor is shorted (RC)
Replace Thyristor
Maximum output with no
main pot control
Brief utility power
interruption
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
SCR is shorted (RC)
Output speed won’t
change or changes erratic
MAX trim pot incorrectly
adjusted
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
Pot cable is unplugged
Lack of shielded cable for
“main” control pot
Damaged main pot