10
Troubleshooting
An electric shock can be fatal. Before opening up the power source, switch it
off, unplug it from the mains and put up a clearly legible and easy-to-understand
warning sign to stop anybody inadvertently switching the machine back on
again. If necessary, discharge the electrolytic capacitors. The fixing-screws of
the housing are used as an appropriate earth connection. Do not use other
screws without appropriate earth connection.
No welding current
Mains switch is ON, operational readiness indicator is not lit up
Cause: Break in mains lead
Remedy: Check mains lead and mains voltage
No welding current
Mains switch is ON, operational readiness indicator is lit upNo welding current
Mains switch is ON, operational readiness indicator is lit up
Ursache: Break in welding cable connection
Remedy: Check the connection
Cause: Faulty or broken earth connection
Remedy: Earth the workpiece properly
No welding current
Mains switch is ON, operational readiness indicator is lit up, malfunction indicator is lit up
Cause: Maximum duty cycle exceeded - machine overloaded
Remedy: Allow the machine to cool down
Cause: Thermostatic cut-out system has tripped - fan is running; temperature
sensor is faulty
Remedy: After a short time, the machine switches on again by itself - if not, contact
after-sales service
Cause: Insufficient cooling air reaching machine
Remedy: Ensure sufficient supply of cooling air
Cause: Power module is very dirty
Remedy: Open up the machine and clean out with dry compressed air
Malfunction indicator is flashing
Cause: Mains overvoltage or undervoltage
Remedy: Check the mains voltage
Mains fuse / safety cut-out has tripped
Cause: Incorrect mains fuse
Remedy: Use correct rating of mains fuse
Cause: Mains fuse is tripped under no-load conditions
Remedy: Contact after-sales service
Poor welding properties
Heavy spattering
Cause: Incorrect electrode polarity
Remedy: Reverse polarity - see manufacturer´s instructions
Troubleshooting
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