Lincoln Electric INVERTEC SVM199-A - Manual (Page 63)

INPUT RECTIFIER TEST PROCEDURE (continued)
6. Use the analog ohmmeter to perform the tests
detailed in Table F.1.
7. If the input rectifier does not meet the accept-
able readings outlined in the table, the compo-
nent may be faulty. Replace.
NOTE: Before replacing the input rectifier, perform
the Switch Board Test and the Input
Contactor Test.
8. When installing a new input rectifier, see Input
Rectifier Removal and Replacement proce-
dure.
9. If the input rectifier is good, be sure to recon-
nect the positive and negative leads to the cor-
rect terminals and torque to 31 in.-lbs. See the
Wiring Diagram.
10. Replace any RTV sealant previously removed.
11. Install the case top.
TROUBLESHOOTING AND REPAIR F-23 F-23
INVERTEC® V450-PRO
TEST POINT TERMINALS
A
B
C
A
B
C
NEG
NEG
NEG
POS
POS
POS
NEG
NEG
NEG
POS
POS
POS
A
B
C
A
B
C
Greater than 1000 ohms
Greater than 1000 ohms
Greater than 1000 ohms
Approx. 500 ohms
Approx. 500 ohms
Approx. 500 ohms
Approx. 500 ohms
Approx. 500 ohms
Approx. 500 ohms
Greater than 1000 ohms
Greater than 1000 ohms
Greater than 1000 ohms
TABLE F.1 – INPUT RECTIFIER TEST POINTS AND ACCEPTABLE READINGS
ANALOG METER X100
RANGE
Acceptable Meter Readings + Probe - Probe
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