WELDKAR WK MIG 5040 F SYNERGIC Mode D'emploi page 35

TIG WELDING
Fault
Mains supply voltage is ON, power
indicator is illuminated however unit
will not commence welding when the
torch trigger switch is depressed.
Mains supply voltage is ON. Indicator
light is not lit and welding arc cannot
be established.
Fault Indicator is illuminated and unit
will not commence welding when the
torch trigger switch is depressed.
Welding output continues when torch
trigger released.
Welding output voltage is present
when the torch trigger switch
is depressed but arc cannot be
established.
Welding output voltage is not present
when torch trigger depressed.
TIG electrode melts when arc is
struck.
Arc flutters during TIG welding.
MMA WELDING
Fault
Power indicator does not light, fan
does not turn, no welding output.
Fan switch, or not subject to potential
instability in the welding current
control, current, big, sometimes small.
Power indicator does light, the fan
rotating is normal, but no welding
output.
Hot welding clamp.
Manual welding big splash.
Cause
Power source is not in the correct
mode of operation.
Faulty torch trigger.
Primary control fuse is blown.
Broken connection in primary circuit.
Duty cycle of power source has been
exceeded.
Trigger mode selection is in 4T
(LATCH) mode.
Torch trigger leads shorted.
Poor or no work lead contact.
Faulty trigger switch / lead.
TIG torch is connected to the (+) VE
terminal.
Tungsten electrode is too large for the
welding current.
Remedy
1. Make sure the power switch is turned on.
2. Confirm that the power input cable are connected with electricity.
1. The current potential is damaged, should be replaced.
2. Bad connections, such as plug-in to be checked.
1. Check all connectors inside the machine if there is bad contact.
2. Check if a circuit output connection is bad.
3. Check if the alarm indicator is lighting:
(1) The duty cycle of the power source has been exceeded. Once the power
source cools down this light will go OFF and the temperature condition will
automatically reset. Note that the mains power switch should remain in the
ON position such that the fan continues to operate thus allowing the unit
to cool sufficiently. Dot not switch the unit OFF should a thermal overload
condition be present;
(2) Check that the thermal protection is damaged and replace it if
necessary.
Welding clamp rated current is too small, the replacement of larger size
welding clamp.
Output polarity is unreasonable, reversed output connector.
Remedy
Set the power source to the correct
mode of operation with the process
selection switch.
Repair or replace torch trigger
switch/lead.
Replace primary control fuse.
Have an Accredited Service Provider
check primary circuit.
Leave the power source switched ON
and allow it to cool. Note that fault
indicator must be extinguished prior
to commencement of welding.
Change to 2T (NORMAL) mode.
Repair or replace Torch / trigger lead.
Clean work clamp area and ensure
good electrical contact.
Repair or replace Torch / trigger lead.
Connect the TIG torch to the (-) VE
terminal.
Select the correct size of tungsten
electrode.
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