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No.
Problem
Root cause
What to do
3
Power light is lit,
digital meter works
and fan
operational, the
error indicator light
is lit.
Damaged fly-back
transformer.
Replace fly-back
transformer.
Damaged IGBT.
Replace IGBT.
Damaged fast recovery
diodes.
Replace fast recovery
diodes.
Fault at control circuit.
Check control circuit
and replace control
board.
4
Power light is lit,
digital meter works
and fan
operational, error
indicator light not
lit, no
high-frequency
discharge sounds
when torch trigger
is activated, no
no-load output.
Poor contact or loose
torch trigger wire.
Reconnect or fasten
torch trigger connecting
wire.
Damaged torch trigger
or broken torch control
wire.
Replace torch trigger.
Fault at control circuit.
Check control circuit
and replace control
board.
5
Digital meter works
and fan operational,
error indicator light
is lit, no no-load
output.
Overheated power supply
owing to insufficient
ventilation.
Improve conditions for
ventilation.
Ambient temperature too
high.
Auto recovery after 5 to
10 minutes.
Duty cycle exceeded.
Auto recovery after 5 to
10 minutes.
