Lincoln Electric INVERTEC 170S Service Manual page 25

EMC FILTER BOARD RESISTANCE TEST (continued)
Input cable
Input cable
Neutral
TEST PROCEDURE
1. Remove main input power to the INVERTEC
2. Follow the case cover removal procedure available in this Service Manual.
3. Perform the Discharge procedure
4. Visually check for burned or damaged components. If any components are physically damaged the
board should be replaced.
5. Disconnect the cables from AC1 and AC2
6. Using the Volt-Ohmmeter (ohm mode) perform the tests following the below table test:
Positive Probe (RED)
L
N
AC1
Phase
EMC Filter Board - Table tests 1
Negative Probe (BLACK)
AC1
AC2
AC2
®
170S
Value
0 ohm
0 ohm
220Kohm +/- 10%
Page24
AC1
To main board
AC2
To main board