SanRex SANMIG 200MF Operator's Manual page 35

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)
7 No gas flow (TIG)
Gas always flows
8
The welding current can not be
9
adjusted
The welding current displayed
10 isn't accordant with the actual
value.
The penetration of molten pool
11
is not enough.
The alarm lamp on the front
12
panel is on
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
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
The adjustment knob of pre-gas time on the
front panel is damaged
The welding current potentiometer on the
front panel connection is not good or
damaged
The min value displayed isn't accordant with
the actual value. (Please refer to §3.1)
The max value displayed isn't accordant with
the actual value. (Please refer to §3.1)
The welding current is adjusted too low
The arc is too long in the welding process
Over heat protection
Reasons
Two much welding
current
33
Solution
Check and repair the front panel and
iuput wire
Repair or change the transformer
Repair or change the control panel
Clear out
Change capacitor
Change fan
Check whether there is power supply
Change it (10A)
Change the LED
Adjust potentiometer Imin on the power
board.
Adjust potentiometer Imaxin the current
meter.
Check the main circuit and the Pr4.
Open or change the gas cylinder
Remove it
Change it
The gas-test on the front panel is off
Remove it
Change it
Repair or change it
Repair or change the potentiometer
Adjust potentiometer Imin on the power
board.
Adjust potentiometer Imax on the power
board.
Increase the welding current
Use 2T operation
Reduce the welding current output