Lincoln Electric PRINCE IM818 - Manual (Page 23)

Prince XL ® - Owner's Manual - Page 16
T
ESTING
T
HE
T
ORCH
M
OTOR
C
HECK
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.
T ESTING THE P OTENTIOMETER
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.
T ESTING THE M ICRO S WITCH
Using the torch Amphenol, check for continuity across pins “E” and “F” when
the trigger is pressed.