On the TIG inverter welding machine TIG 180 DC from RED by Lorch, the error code E02 indicates a problem in the power section of the device. This is the electronic unit that controls and supplies the welding current.
Possible Causes and Solutions
Power unit faulty (possibly IGBT cirquit)
Solution: Contact RED Service.
An overview of all error and information messages for the RED TIG 180 DC can be found in this article: Troubleshooting (RED TIG 180 DC)
Detailed information on operation and further advice on handling your RED welding machine can be found in the user manual for the TIG 180 DC