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REDI-MIG 455 Remote
IMA 603
Possible Cause
Defective wire feed motor or wire drive
control PC board.
Defective wire drive control PC board.
Overtemperature protection circuit
actuated due to overload or short.
(Overtemperature light should be
illuminated).
Faulty gun trigger switch or damaged
control cable connected to gun trigger.
Defective control PC board.
Defective contactor.
Improper settings for wire feed speed and
volts.
Faulty switch either coarse control (on/off)
or fine control.
Faulty pilot transformer.
Faulty main transformer.
Faulty rectifier.
Faulty choke.
One phase disconnected.
What To Do
Measure the voltage between the motor
leads (54) and (53) when the Gas
Purge/Wire Inch toggle switch is pressed
downwards. If this voltage is over 10V
DC, replace the wire feed motor. If no
voltage is registered, replace the wire
drive PCB. (Refer PCB replacement
procedure on page 19).
Replace PCB. (Refer PCB replacement
procedure on page 19).
Allow machine to cool down and reduce
on time and/or wire feed speed.
Repair.
Refer Procedure for Replacing PC
Boards, if no fault is detected in trigger-
thermostat circuit.
Replace defective contactor.
Set controls correctly.
Replace switch.
Replace.
Replace.
Replace
Replace.
Check fuses, check input connection.
Problem
No wire feed, although arc
voltage is present.
No control of wire feed.
No wire feed and no arc
voltage. Pilot light indicates
input power to machine.
Poor welding characteristics
and/or cannot obtain full rated
output as per nameplate.
TROUBLESHOOTING