173
EN
Power source -
troubleshooting
tSt | xxx
Note: xxx is a temperature value
Cause: Overtemperature in the control circuit
Remedy: Allow power source to cool down
Power source has no function
Mains switch is on, but indicators are not lit up
Cause: There is a break in the mains lead; the mains plug is not plugged in
Remedy: Check the mains lead, ensure that the mains plug is plugged in
Cause: Mains socket or mains plug faulty
Remedy: Replace faulty parts
Cause: Mains fuse protection
Remedy: Change the mains fuse protection
No welding current
Mains switch is on, one of the overtemperature service codes "to" is displayed. Detailed
information on the service codes "to0" to "to6" can be found in the section "Displayed serv-
ice codes".
Cause: Overload
Remedy: Take the duty cycle into account
Cause: Thermostatic safety cut-out has tripped
Remedy: Wait until the power source automatically comes back on after the end of the
cooling phase
Cause: Limited supply of cooling air
Remedy: Remove air filter on the rear of the housing from the side and clean. Ensure
that the cooling air ducts are accessible.
Cause: The fan in the power source is faulty
Remedy: Contact After-Sales Service
No welding current
Mains switch is on and indicators are lit up
Cause: Grounding (earthing) connection is incorrect
Remedy: Check the grounding (earthing) connection and terminal for correct polarity
Cause: There is a break in the current cable in the welding torch
Remedy: Change the welding torch
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