SanRex SANARG 180AP Operator's Manual page 32

Troubles
S/N
Turn on the power source, and
1 fan works, but the power pilot
lamp is not on.
Turn on the power source, and
2 the power lamp is on, but fan
doesn't work
Turn on the power source, the
3 power lamp is not on, and fan
doesn't work
The number on the display is not
4
intact.
The max and
5 displayed doesn't accord with
the set value.
No no-load voltage
6
(MMA)
Arc can not be
7
ignited (TIG)
8 No gas flow (TIG)
9 Gas always flows
MAINTENANCE & TROUBLESHOOTING
The power light damaged or connection is
not good
The transformer of power is broken
Control PCB failures
There is something in the fan
The start capacitor of fan damaged
The fan motor damaged
No power supply input
The fuse inside the machine damaged
The LED in the display is broken
The max value is not accordant (refer to
min value
§3.1)
The min value is not accordant (refer to §3.1)
output
The machine is damaged
The welding cable is not connected with the
two output of the welder.
The welding cable damaged.
There is spark
on the HF The earth cable connected unstably.
igniting board.
The welding cable is too long.
There is oil or dust on the workpiece.
The HF igniting board does not work.
There is not
spark on the
HF igniting
board.
The malfunction of the welding gun switch.
Gas cylinder is close or gas pressure is low
Something in the valve
Electromagnetic valve is damaged
The gas-test on the front panel is on
Something in the valve
Electromagnetic valve is damaged
Reasons
30
Solution
Check and repair Pr7
Repair or change the transformer
Repair or change the control Pr4
Clear out
Change capacitor
Change fan
Check whether there is power supply
Change it (3A)
Change the LED
Adjust potentiometer Imin on the power
board.
Adjust potentiometer Imaxin the current
meter.
Check the main circuit and the Pr4.
Connect the welding cable to the
welder's output.
Repair or change it.
Check the earth cable.
Use an appropriate welding cable.
Check and remove it.
Repair or change Pr8
Check the welding gun switch, control
cable and aero socket.
Open or change the gas cylinder
Remove it
Change it
The gas-test on the front panel is off
Remove it
Change it