Troubleshooting and repair – Lincoln Electric INVERTEC SVM199-A User Manual
Page 104
FIGURE F.17 – INPUT RECTIFIER LOCATION
INPUT RECTIFIER
REMOVAL AND REPLACEMENT PROCEDURE (continued)
REMOVAL PROCEDURE
1. Remove input power to the V450-PRO.
2. Using the 3/8” nut driver, remove the case top,
input access panel and sides.
3. Perform the Capacitor Discharge Procedure.
4. Locate and remove the RTV sealant from the
input rectifier connection terminals. See Figure
F.17.
5. Label and, using the Phillips head screwdriver,
carefully remove the five leads from the input
rectifier terminals. Note placement for
reassembly. See Figure F.17.
6. Using the 3/16” allen wrench, remove the two
mounting screws and washers from the rectifier
module.
7. Carefully remove the input rectifier module.
REPLACEMENT PROCEDURE
1. Clean heat sink surfaces.
2. Apply an even coating of joint compound
(Penetrox A-13) to both the heat sink and mod-
ule mounting surfaces. The joint compound
should be 0.002 - 0.005 in. thick per surface.
3. Mount the module to the heat sink and evenly
torque the mounting screws (with washers) to
44 in/lbs.
4. Assemble the leads to the correct module ter-
minals and torque to 26 in/lbs. See Figure F.17.
5. Apply RTV sealant to the rectifier connection
terminals.
6. Install the case top, sides, and input access
panel using the 3/8” nut driver.
TROUBLESHOOTING AND REPAIR
F-64
F-64
INVERTEC® V450-PRO
NEG (-)
POS (+)
A
B
C
INPUT
RECTIFIER
NEG (-)
POS (+)
A
B
C
INPUT
RECTIFIER