Hyundai MMA-160 - User Manual

Questions and Answers

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hmorrisonAug 13, 2025
What to do if QC LED is on continuously on Hyundai Welding System?
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  Angela SmithAug 13, 2025
  If the QC LED on your Hyundai Welding System is continuously on or lights up when striking an arc, it could indicate a few issues. First, the machine might be in over-heat protection, so wait for 15 minutes. Alternatively, it could be in over-current protection; in that case, turn off the machine for 30 seconds and then switch it on again. If the QC LED remains on and the system is not working, it may indicate a fault on the board, a faulty IGBT on the control board, or issues with the fast recovery diodes or transformer.
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Courtney RayAug 16, 2025
What to do if Hyundai Welding System power is on but there's no welding output?
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  Theresa SchmidtAug 16, 2025
  If the power indicator is lit and the fan is working on your Hyundai Welding System, but there's no welding output, start by checking if all cables are connected properly. Also, inspect the output connectors for any disconnection or damage. If the issue persists, the control circuit might be faulty.
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Andrea RichardsonAug 20, 2025
How to fix Hyundai MMA-160 Welding System when power indicator is not lit?
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  Tiffany MccartyAug 20, 2025
  If the power indicator is not lit, the fan isn't working, and there's no welding output on your Hyundai Welding System, first ensure the power switch is working. Next, check the connection from the power switch to the power board to ensure it's in good condition. Verify that the plug you are using is working and that the input voltage is correct. If these steps don't resolve the issue, the control board might be faulty.
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qsmithAug 25, 2025
Why is the output current unstable on my Hyundai MMA-160 Welding System?
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  Jermaine SandovalAug 25, 2025
  The unstable output current on your Hyundai Welding System could be due to an unstable input voltage or harmful interference from the input voltage or other equipment.
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Christopher EdwardsAug 28, 2025
Why is there excessive spatter in my Hyundai MMA-160 during MMA welding?
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  Molly BraunAug 28, 2025
  If your Hyundai Welding System produces excessive spatter during MMA welding, it might be due to an incorrect output polarity connection. Try exchanging the polarity to resolve this issue.
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kim85Aug 31, 2025
What to do if the electrode holder becomes very hot on my Hyundai MMA-160?
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  williamstiffanyAug 31, 2025
  If your Hyundai Welding System's electrode holder becomes very hot, it is likely that the rated current of the electrode holder is smaller than its actual working current. Replace it with one that has a higher rated current.
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Brian MaxwellSep 4, 2025
What to do if my Hyundai Welding System has power but no welding output?
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  Danielle SandovalSep 4, 2025
  If your Hyundai Welding System turns on, the power LED is on, and the fan works, but there is no welding output, consider the following: * Check for any loose connections inside the machine. * Inspect the output terminal joint for open circuits or loose contacts. * If the overheating LED is illuminated, the machine may be in an over-heating protection state. Allow the welding machine to cool down to see if it recovers automatically. * Check the thermal switch and replace it if it is damaged.
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Alexander FinleySep 7, 2025
How to fix a Hyundai MMA-160 Welding System that won't turn on?
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  Christopher MendozaSep 7, 2025
  If your Hyundai Welding System doesn't turn on, the power LED is off, the fan isn’t working, and there is no welding output, check if the power switch is closed and ensure that there is input power.

Hyundai MMA-160 Specifications

General

Input Voltage	220V
Frequency	50/60Hz
Output Current Range	20-160A
Duty Cycle	60%
Electrode Diameter	1.6-4.0mm
Protection Class	IP21S
Insulation Class	F
No-load Voltage	56V
Efficiency	85%