MIDWEST FASTENERS CD80, Руководство пользователя

Страница: 17 / 26

16
©2001
MIDWEST FASTENERS, INC.
—
CD 80 Stud Welder
PROBLEM POSSIBLE CAUSE CORRECTIVE ACTION
TROUBLESHOOTING CHART
1. Welder does not turn on
and will not weld.
2. Circuit Breaker trips or
fuse blows each time the
controller is turned on or
fuse blows.
3. Circuit Breaker trips or
fuse blows when weld is
made.
4. Welder powers on, but
does not operate.
A. Power cable connection at
controller or 115 VAC outlet not
complete.
B. Power cable/connector
damaged.
C. Open circuit breaker, fuse or
damaged wall outlet.
A. Shorted weld capacitor.
B. Shorted rectifier.
C. Faulty circuit breaker.
D. Shorted transformer.
A. Shorted charge SCR.
B. Faulty printed circuit (PC) board.
A. Ground cable or gun cable
connections not complete.
B. Broken gun control cable or
loose wire connection in plug.
C. Shorted gun control wires at the
gun trigger switch.
D. Faulty printed circuit board.
Inspect power cable connection.
Repair if loose.
Check for continuity. Repair break
or replace connector.
Check with ohmmeter. Replace
defective part (Fuse = BUSS
MDA20, or equivalent.)
Check capacitors safety vent seal for
rupture hole. Replace defective
capacitor.
Check with ohmmeter. Replace
rectifier if defective.
Check with ohmmeter. Replace
rectifier if defective.
Remove two orange wires from
charge rectifier. If fuse continues to
blow, replace transformer.
Check with ohmmeter. (Should not
show continuity in either direction.)
Replace if defective.
Replace with new PC board if defective.
Check for continuity and proper
connection of ground to workpiece.
Check continuity between pins “+”
and “ Z” of plug while depressing
gun trigger. Should read continuity
only when depressed.
Check continuity between pins “+”
& “Z” of plug. No reading should
be observed while gun trigger is in
the released position.
Replace with new PC board if defective.