Lincoln Electric INVERTEC V350-PRO Service Manual page 62

F-12
FAULT CODES
39
43
44
NOTE:
If more than one fault message is being displayed, perform all the checks for the faults
TROUBLESHOOTING & REPAIR
DESCRIPTION/
DEFINITION
Electrical "glitch" on the
primary over current fault
detector circuit.
Capacitor banks "A"
(lower) and "B"(upper)
are not balanced.
The machine has
detected a fault in the
central processing unit
(CPU).
before replacing the printed circuit board
V350-PRO
CORRECTIVE
ACTION
Possibly caused by an
external electrical
"noise" or signal level.
Make sure the V350-Pro
is grounded correctly.
The machine is self
clearing when
condition ceases.
Make sure the recon-
nect switches are con-
figured for the input
voltage being applied to
the machine. The
machine is self-clearing
when
condition ceases.
Make sure the V350-Pro
is grounded correctly.
The machine is self
clearing when
condition ceases.
F-12
SERVICE FACILITY
CORRECTIVE
ACTION
Perform the Main Switch
Board Test.
Perform the Power
Board Test.
There may be a problem
with the primary current
sensors (CT) located on
the main switch board.
See the wiring diagram.
The control board may
be faulty.
There may be a problem
with the V/F signals from
the main switch board to
the control board.
Perform the Main Switch
Board Test.
The capacitor(s) may be
faulty. Check and
replace if necessary.
Perform the Power
Board Test.
The control board or
associated wiring may be
faulty. See the wiring
diagram.