Lincoln Electric IM818 manual Remove the torch connector from the cabinet

TESTING THE TORCH

MOTOR CHECK

Remove the torch connector from the cabinet.

Using the torch Amphenol, check the resistance across pins “A” and “B” (motor leads). The resistance across the motor should be between 5-10 ohms.

If an open circuit or short exist, check the motor leads and motor indepen- dently.

TESTING THE POTENTIOMETER

Using the torch Amphenol, check the resistance across pin “D” (wiper) and pin “C”. The resistance should vary from 0 - 5K ohms.

Check the resistance across pin “D” (wiper) and pin “G”. The resistance should vary from 5K - 0 ohms.

TESTING THE MICRO SWITCH

Using the torch Amphenol, check for continuity across pins “E” and “F” when the trigger is pressed.

Prince XL® - Owner's Manual - Page 16