Service manual

Edition 101222
-- 30 --
s1Cad160
Fault tracing
Type of fault Actions
Machine is dead.
LED is off (display is off).
Fan is not working.
S Check that the mains power supply switch is turned on.
S Check that the welding current supply and return cables
are correctly connected.
S Check that correct current value is set.
The machine is dead.
LED is off (display is off).
Fan is not working.
Mains fuse tripped.
General failure in the power block.
S Check the power PCB according to the description on
the next page.
S Replace damaged parts.
NOTE! Insufficient check may cause another failure of the
new part.
No wire feeding.
Fan is working.
LED (or display) is on.
S Check torch switch circuit.
Check lack of the indicated failure.
Press the torch pushbutton and check the open circuit
voltage.
If it is proper cca 58V, search failure in the control PCB.
The equipement seems to
work properly, however the
welding seems to be imposs-
ible.
S Check the open circuit voltage.
If it is significantly less then 58V, check the DC bus
voltage (390...400V). Search for the failure in the PFC
part.
S Check the gas supply.
S Visually check the quality of the wire feeding.
Correct wire placement, roll etc.
No shielding gas.
S Check gas connection.
S Check the gas valve operation by listening to the sound
of the tripping.
S Check the voltage on the solenoid. In the steady state it
should amount approx. 12V DC (average).
The equipement seems to
work, but it is permanently
blocked by some error.
The yellow diode is on (the
display shows error).
S Note that any failure is latched, when the torch button is
on. Release it if pressed.
S Overheating should disappear after 3...4 minutes. Wait.
S Switch the equipment off and switch on again after 2
minutes.
S If it is still disabled -- look for failure in the control PCB.
Lack of any voltage may cause permanent disability.