GALAGAR SMART MIG 350 MP Manual Técnico De Instrucciones página 28

9. TROUBLESHOOTING
WARNING: The following operation requires sufficient professional knowledge on electric
aspect and comprehensive safety knowledge. Operators should be holders of valid
qualification certificates which can prove their skills and knowledge. Make sure the input cable
of the machine is disconnected from the electricity utility before uncovering the welding
machine.
9.1 Check following items before troubleshooting:
1) Check if the switches on the front panel are in correct position.
2) Check if the 3-phase power is 340~420V, and if phase failure occurs.
3) Check if the input cable of the machine is correctly and well connected.
4) Check if the machine is correctly and reliably earthed.
5) Check if the welding cable is correctly and well connected.
6) Check if the gas path and gas regulator is in good condition.
Note: The voltage inside the machine can reach up to 600V, so do not uncover the machine due to safety hazard.
Take necessary protection during troubleshooting and maintenance work to avoid electric shock. Cut off the power
before the installation of welding cable and replacement of torch parts.
9.2 Common malfunction analysis and solution
Malfunction phenomena
The overheating LED is on.
The power LED is off, and there
is no output current.
There is no response when
pushing the torch trigger, and
the protection LED is off.
When torch trigger is pressed,
wire feeder works and gas
comes out, but there is no
output current, and the
protection LED is off.
SMART MIG 350 MP
1. Check the welding current and welding time. Refer to the manual, and
operate according to the duty cycle requirement.
2. Check the running status of the fan when welding. If the fan does not
work, check if the power supply of the fan is 220V: If the power supply is
normal, check the fan; if the power supply is abnormal, check the
connecting cable of the power supply.
3. Replace the thermal switch if it is damaged.
1. Check if the fan works. If it does not work, it indicates that the power
cord is not in good contact.
2. If the fan works, it indicates that the control PCB PK-131 inside the
machine fails.
1. Check if the gun trigger is in good contact.
2. Check if the welding torch is well connected to the European connector,
and check the control jack of the European connector.
3. The wire feed PCB PH-119 inside the machine fails.
1. Check if the cable to the workpiece is in good contact.
2. Check if the quick plug is connected to correct quick socket.
3. Check the welding torch for damage.
4. The control PCB PK-131 inside the machine fails.
Solution
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