Plug j20, Lead 716, Lead 715 – Lincoln Electric INVERTEC V350-PRO SVM152-A User Manual
Page 81: Troubleshooting and repair
Lead 716-
Plug J20
Lead 715+
TROUBLESHOOTING AND REPAIR
FAN CONTROL AND MOTOR TEST (continued)
F-43
F-43
V350-PRO
7.
If the 115VAC is low or not present perform
The Auxiliary Transformer Test. Also check
plug J22 and associated leads for loose or
faulty connections. See the Wiring Diagram.
8.
Energize the weld output terminals (Select
Weld Terminals ON) and carefully check for
115VAC at plug J22 pin-1 to J22 pin-4 (fan
leads). See Figure F.13. If the 115VAC is pre-
sent and the fan is not running then the fan
motor may be faulty. Also check the associat-
ed leads between plug J22 and the fan motor
for loose or faulty connections. See the Wiring
Diagram. WARNING: HIGH VOLTAGE IS
PRESENT AT THE SWITCH BOARD.
9.
If the 115VAC is NOT present in the previous
step then proceed to the fan control test.
FAN CONTROL TEST PROCEDURE
1.
Locate plug J20 on the switch board. Do not
remove the plug from the switch board. See
Figure F.12 and Figure F.14.
2.
Energize the weld output terminals (Select
Weld Terminals ON) and carefully check for
+15VAC at plug J20 pin-6+ to J20 pin-2- (leads
715 to 716). See Figure F.14. If the 15VAC is
present and the fan is not running then the
switch board may be faulty. If the 15VDC is
not present when the weld terminals are ener-
gized then the control board may be faulty.
Also check plugs J20, J7, and all associated
leads for loose or faulty connections. See the
Wiring Diagram.
WARNING: HIGH VOLTAGE IS PRESENT AT
THE SWITCH BOARD.
3.
Remove the input power to the V350-PRO.
Note: The fan motor may be accessed by the
removal of the rear panel detailed in The
Current Transducer Removal and
Replacement Procedure.
4.
Replace the case wrap-around cover.
FIGURE F.14 PLUG J20