Thermal Arc Fabricator 140, Руководство по обслуживанию, Страница: 61 / 84

ADVANCED TROUBLESHOOTING FABRICATOR 140, 180
Janua r y 25, 2008 6-5 Manual 0-4992
6.10 Wire Feed and Weld Problems
A. Poo r o r inconsistent a r c t r ansfe r o r no a r c t r ansfe r .
1. Poo r wo r k cable connection o r open wo r k cable.
a. Clean contact point whe r e the wo r k cable
attaches to the wo r k piece.
b. Check continuity of the wo r k cable.
B. Othe r welding p r oblems.
1. See Section 5.04 Solving P r oblems Beyond the
Welding Te r minals.
6.11 Rectifier Assembly Test Procedure
A. Remove the inside cove r .
1. Disconnect and isolate the black wi r e f r om the
negative capacito r te r minal (A). Refe r to Figu r e
6-1.
2. Disconnect and isolate the t r ansfo r me r wi r e f r om
te r minal AC1. Refe r to Figu r e 6-1.
3. Using a multimete r set to diode test scale, pe r fo r m
the checks as indicated in the cha r t.
METER (+) METER (-) INDICATION
-OUT +OUT Open
-OUT AC1 Open
-OUT AC2 Open
+OUT -OUT (2) Diode d r op
AC1 -OUT Diode d r op
AC2 -OUT Diode d r op
+OUT AC1 Diode d r op
+OUT AC2 Diode d r op
AC1 +OUT Open
AC2 +OUT Open
B. Replace the Rectifie r Assembly if sho r ted o r open
diode is found. Reconnect wi r es p r eviously r emoved
f r om te r minals A and AC1.
A +OUT -OUT
AC1 AC2
Art # A-08255
Figu r e 6-1: Rectifie r Connection Points