Lincoln Electric INVERTEC IM465-B - Manual (Page 24)

E-6 TROUBLESHOOTING E-6
INVERTEC DC TIG STARTER
Environmental Protection
High voltage connections are covered with an RTV
sealant to prevent malfunction in severe environ-
ments. Sealant must be applied to connections which
have been opened or otherwise lost their protection. A
noncorrosive electronic grade sealant such as Dow
Corning 3140, 3145, 738, Columbus Adhesives 0172
or GE RTV-162 is recommended. Sealant may also
be purchased from Lincoln Electric (order E2519
Silicone Rubber RTV Coating).
Printed Circuit Board Replacement
1. Handle PC boards by edges only.
2. Store PC boards only in the bags that they are
shipped in. Some PC boards require special bags
that disperse static charges.
3. Inspect malfunctioning PC boards for burned con-
ductors or components. If damage is visible,
inspect the machine wiring for grounds or shorts to
avoid damaging a new PC board.
4. If there is no visible damage to the PC board, install
a new PC board and see if the problem is fixed. If
the problem is fixed by the new board, reinstall the
old board and see if the problem reoccurs. If the
problem does not reoccur, check the wiring harness
and plugs for loose connections or faults.