Troubleshooting - Kemppi Master S 400 Operating Instructions Manual

5.

TROUBLESHOOTING

The control panel will display any errors of the system. Error code numbers are shown in the
display and can be compared to the table below.
5.1 Troubleshooting
Power On light is not illuminated.
There is no electrical power to the machine.
• Check the mains electrical supply is connected.
• Check the mains fuses, replace blown fuses.
• Check the mains cable and plug, replace defect parts.
The machine is not welding properly. Welding creates spatter. The weld joint is porous or
power supply is insufficient.
• Check the welding parameter settings and adjust if needed. See welding parameter
table on page 10.
• Check that the earth return clamp is properly fastened and that earth return cable has no
defects. If necessary change the clamp location and replace defective parts.
• Check the welding cable and connector. Tighten the connection(s) and replace defective
EN
parts.
Power source overheating pilot lamp is illuminated.
Power source has exceeded the designed working temperature. Fans are running and the
machine is in a cooling down cycle. The machine will reset automatically.
• Check that there is enough free space around the machine for cooling air circulation.
• In some cases when error occurs, the machine turns off. Then user must turn the main
switch off and on again.
• Check that welding circuit is open.
14
Master S 400, 500