Lincoln Electric INVERTEC V160 Service Manual page 38

TEST PROCEDURE
1. Remove main input power to the Invertec V160
2. Remove the four screws in the rear panel of the
machine
3. Pull the rear panel and take out the handle
4. Pull up carefully the red cover and disconnect the
ground connection
5. Take out the red cover
6. Perform the Discharge procedure
7. Visually check for burned or damaged components
On the inverter board.If any components are
physically damaged or determined to be faulty the
inverter board should be replaced.
8. Apply the correct input power to the V160
machine
9. Carefully test for approximately 325 Vdc between
terminals DC+ and DC-
10. Check between pin 1 and 3 of JP1 for +15Vdc,
this is the rectified and regulated DC supply
voltage for the inverter control circuitry.( see the
Pin 1
Pin 2
Output
Terminals
BACK
11. Check on A1 connection (see the below picture)
•
•
•
•
•
-
-
12. Put the process switch on the front panel to
13. Check on the output terminals + and – for about
INVERTER BOARD
JP1
A1
connector
connection
Pin 1
wiring diagram X0190 )
the following voltage references( machine in Tig HF ) :
Use pin 20 as a ground
On pin 12 a voltage between 0 V and 2.7 V
depending of the position of the current
potentiometer ( pot to Max = 2.7 V )
On pin 13 a voltage of about 0.6 V. A different value
means a problem on a thermal protection.
On pin 22 a voltage of 12 Vdc
On pin 24 you can find two voltages level:
15 Vdc if the inverter is OFF
0 Vdc if the inverter is ON
Stick position.
44 – 48 Vdc.
DC+ /
DC-
terminals
38