Lincoln Electric INVERTEC V350-PRO Service Manual page 146

F-96
Test
Steps
46
This will only appear if a potentiometer is still connect-
ed to the 14-pin amphenol connector. If this message
appears, disconnect the potentiometer from the 14-pin
amphenol connector.
47 Test steps 21-24 verify the functionality of the gas sole-
noid. If an oscilloscope is available, verify that the cur-
rent flowing through the gas solenoid is zero before the
solenoid is energized, increases to approximately
700mA (pull in current), remains at 700 mA for approxi-
mately 150 msec, and decreases to approximately
200mA (hold current). Press the local/remote pushbut-
ton to turn the gas solenoid on.
700mA
200mA
0mA- - - - +
Or, the signal can be verified by measuring 12.3 VDC
+/- .5V from lead 553A to 554A (Lead 553A should be
positive)
48
Press the local/remote pushbutton again to turn the gas
solenoid off.
After completing all of the above tests, the following will appear on the display.
Verify this message appears for approximately 3 sec-
onds
TROUBLESHOOTING AND REPAIR
RETEST AFTER REPAIR
Required Action
< - 150msec - >
+------------------------+
V350-PRO
+-----....------+
+-------------
F-96
Expected Results
Lft.display Rt. display
dcon 14-pIn roCP
GAS On
GAS
OFF
DIAg PASS