SET-UP AND SAFE OPERATING PROCEDURES
11-39
89210000
Problem
Possible Cause
Possible Remedy
Electrode will not feed or
retract
Electrode not properly inserted
physical contact with drive
system not optimum.
Check, re-insert electrode
Defective contact shoe
surface due to prior arcing
between shoe and electrode,
resulting in pitted surface.
Check electrode surface for
identifying scratch marks
Repair shoe surface by
sanding if minor damage,
otherwise replace shoe
Defective “Jog” switch on
control panel
Replace “Jog” switch
Defective “Control Power”
switch on control panel
Replace “Control Power”
switch
Defective motor cable
Connector(s) J4/J5/J6
improperly or not firmly
attached on MCCB*
Check connector (s) for solid,
proper fit
Defective MCCB*
Replace MCCB*
Defective electrode drive
motor
Repair/replace motor
Air solenoid energizes but
contactor doesn’t
Open contactor coil
Replace contactor coil
assembly
Defective rectifier bridge in
contactor unit
Replace rectifier bridge
Start sequence trips circuit
breaker
Short in interconnect cable
which links control panel to
contactor
Repair/replace interconnect
cable
Defective rectifier bridge in
contactor unit
Replace rectifier bridge
Worn or defective breaker
Replace breaker
Overheat shutdown system
keeps shutting down the unit,
even “Cold” stages. (Yellow or
Red indicators “ON”)
Defective temperature
sensor(s) in contactor
Replace sensor(s)
NOTE:
MCCB* = MASTER CONTROL CIRCUIT BOARD.
Trouble Shooting Guide