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PROBLEM
9. Wire feed motor runs and
solenoid turns on but no arc
voltage is present.
10. Speed does not change when
weld current flows.
11. Voltmeter does not function or
read properly when arc voltage
is present.
12. Arrow keys do not change
WFS or Volts/Trim.
13. Purge key does not turn on
solenoid but trigger closure
does.
POSSIBLE CAUSE
a. Power source is defective.
b. Input cable is defective.
c. Control PC Board is defective.
a. Run-In and weld speeds are set
to the same value or Run-In is
set to - - -.
b. Power source may be defective
or there may be a control cable
problem with the serial
communications - see problem
2e.
a. See problem 2e, also 67
electrode sensing lead or
connections may be intermittent.
a. This is normal as only WFS and
Volts/Trim knobs will adjust these
settings.
a. Defective keypad or Display PC
Board is defective.
WHATTODO
a. Disconnect input cable from
power source and place a jumper
across sockets C & D of 14-
socket receptacle at power
source. If no arc voltage is
present then power source is
defective.
b. Disconnect input cable from
power source and check
continuity between socket C of
8-socket plug and pin C of 14-pin
plug of the input cable and socket
D of 8-socket plug and pin D of
14-pin plug of the input cable.
Replace cable if no continuity.
c. Replace Control PC board. (See
Procedure for Replacing PC
boards).
a. Set Run-In and weld speeds to
desired settings.
b. Check input control cable per
problem 2e. If this is O.K. then
replace Control PC board. (See
Procedure for Replacing PC
boards.)
a. Check continuity from brass
block on wire feed unit to pin-F
on input connector at control box.
Otherwise, replace Control PC
board. (See Procedure for
Replacing PC Boards.)
a. Refer to Operations Section of
this manual.
a. Check continuity between
sockets 5 and 1 of keypad
connector when purge key is
closed. If not, then replace
keypad, otherwise replace
Display PC board. (See
Procedure for Replacing PC
boards.)
PROBLEMS