Tweco 300 DC Arcmaster - Manual (Page 57)

ARCMASTER 300 ACDC
February 22, 2006 10-7
10.03 Power Source Problems
Description Possible Cause Remedy
A The Primary supply voltage
has not been switched ON.
A Switch ON the Primary
supply voltage.
B The Welding Power Source
switch is switched OFF.
B Switch ON the Welding
Power Source.
C Loose connections
internally.
C Have an Accredited Thermal
Arc Service Agent repair the
connection
2 Maximum output
welding current can
not be achieved with
nominal Mains supply
voltage.
Defective control circuit. Have an Accredited Thermal
Arc Service Agent repair the
connection
A Loose welding cable
connections.
A Tighten all welding cable
connections.
B Incorrect welding cable size. B Use proper size and type of
cable.
C Improper input connections. C Refer to Section 2.05
Electrical Input
Requirements.
D Poor electrode condition. D Replace electrode.
E Wrong welding polarity. E Verify output torch
connections.
A Gas hose is cut. A Replace gas hose.
B Gas passage contains
impurities.
B Disconnect gas hose from
the rear of Power Source
then raise gas pressure and
blow out impurities.
C Gas regulator turned off. C Turn gas regulator on.
D Torch trigger switch lead is
disconnected or
switch/cable is faulty.
D Reconnect lead or repair
faulty switch/cable.
4 No gas flow when the
torch trigger switch is
depressed.
1 The welding arc
cannot be established.
3 Welding current
reduces when
welding.
Table 10-3: Power Source Problems