Fronius TransSteel 5000 - Troubleshooting; General; Safety; Power Source - Troubleshooting

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The power sources are equipped with an intelligent safety system. This means that apart
from the fuse for the coolant-pump, it has been possible to dispense with fuses entirely.
After a possible malfunction or error has been remedied, the power source can be put
back into normal operation again without any fuses having to be replaced.
Troubleshooting
General
WARNING! An electric shock can be fatal. Before opening the device
- Turn the mains switch to the „O“ position
- Unplug the device from the mains
- Put up an easy-to-understand warning sign to stop anybody inadvertently
switching it back on again
- Using a suitable measuring instrument, check to make sure that electri-
cally charged components (e.g. capacitors) have discharged
CAUTION! Inadequate PE conductor connections can cause serious injury
and damage. The housing screws provide a suitable PE conductor connection
for earthing (grounding) the housing and must NOT be replaced by any other
screws which do not provide a reliable PE conductor connection.
Safety
Power source -
troubleshooting
tSt | xxx
Remark: xxx stands for a temperature value
Cause: Overtemperature in the control circuit
Remedy: Allow the power source to cool down
Power source inoperative
Mains switch is on, power source ON indication not lit up
Cause: There is a break in the mains lead; the mains plug is not plugged in
Remedy: Check the mains supply lead, make sure that the mains plug is
plugged in
Cause Mains outlet socket or plug is faulty
Remedy: Replace faulty components
Power source inoperative
Mains switch is on, power source ON indication not lit up
Cause: Mains fuse is faulty
Remedy: Change the mains fuse
No welding current
Mains switch is ON, overtemperature indication is lit up
Cause: Overload; the duty cycle has been exceeded
Remedy: Do not exceed the duty cycle
Cause: Thermostatic cut-out system has been tripped
Remedy: Wait until the power source automatically comes back on after the
end of the cooling phase
Cause: The fan in the power source is defective
Remedy: Change the fan