TROUBLESHOOTING
7
WARNING:
• Have qualified personnel do the troubleshooting work. Turn the engine off before working inside the machine. In some
cases it may be necessary to remove safety guards to perform required maintenance. Remove guards only when necessary
and replace them when the maintenance requiring their removal is complete. Always use the greatest care when working
near moving parts.
• Do not put your hands near the engine fan. If a problem cannot be corrected by following the instructions, take the
machine-to the nearest Red-D-Arc Location.
TROUBLE
CAUSE
WHAT TO DO
1. Welder does not start
No input power.
Check power switch.
Note: It is normal for the
Fan not to run when machine
Check lines voltage.
is cold.
Check power supply and connections.
2. Welder has not output.
Remote control switch is in ‘ON’ position
Put remote switch in ‘OFF’ position.
with no remote OCV=OV.
3. Welder has abnormal arc.
Defective SCR.
Check OCV. If low check for defective SCRs.
Also check all connections.
Defective PC board.
Check OCV. If low check for defective PC board.
Also check all connections.
