Lincoln Electric SVM114-C service manual G3425, 667 555 691 621 500 512 690

Return to Section TOC

Return to Section TOC

Return to Master TOC

Return to Master TOC

F-17 TROUBLESHOOTING AND REPAIR F-17

GAS SOLENOID VALVE AND CONTROL PC BOARD TEST

(FOR CODES ABOVE 10500 ONLY) (continued)

FIGURE F.8. – CONTROL PC BOARD.

G3425

667 555 691

621

J1 J3 J4 J2

500 512 690

Return to Section TOC

Return to Section TOC

Return to Master TOC

Return to Master TOC

2.Check for the presence of the DC voltage applied from plug J1 pin 1 (667+) to plug J1 pin 3 621(-). See Figure F.8.or F.8.a.

3.Check for the presence of 5 to 6 VDC from lead 690(+) to lead 691(-) at solenoid valve. The LN-25™ trigger circuit must be activated or the purge button must be pressed.

4.If the above voltage reading is not correct at the solenoid valve, check for 5 to 6VDC at plug J2 pin 3 lead 690(+) & pin 6 lead 691 (-). See Figure F.8.

5.If the above voltage check is not correct, the control board may be faulty. Refer to the wiring diagrams in the Electrical Diagrams Section.

The appropriate jumper plugs may be used to isolate and check suspect contactor or remote control boards

NOTE: Machines with Codes above 10100 that have been upgraged to the L12253-[ ] Control boardhave thesme connection points ad shown in Figure F.8 for the supply and solenoid voltages

LN-25™