E-2

 

TROUBLESHOOTING

E-2

 

 

 

 

 

 

Observe all Safety Guidelines detailed throughout this manual

 

 

 

 

 

 

PROBLEMS

POSSIBLE

RECOMMENDED

 

 

(SYMPTOMS)

CAUSE

COURSE OF ACTION

 

 

 

 

 

 

OUTPUT PROBLEMS

Thermal light comes on

1. Thermal shut down. Dirt and dust

 

 

 

 

may have clogged the cooling

 

 

 

 

channels inside machine; air

 

 

 

 

intake and exhaust louvers may

 

 

 

 

be blocked; welding application

 

 

 

 

may exceed recommended duty

 

 

 

 

cycle. Wait until machine cool

 

 

 

 

down and thermal light goes out.

 

 

 

 

Blow out machine with clean, dry

 

 

 

 

low pressure air; check air intake

 

 

 

 

and louvers; stay within recom-

 

 

 

 

mended duty cycle.

 

 

 

2.

Bad thermostat or its connections

 

 

 

 

 

Meter doesn’t light up

1.

Losing AC supply to Control PC

 

 

 

 

board

 

 

 

2.

Loosing input to machine

 

 

 

3.

Faulty Control PC board

 

 

 

 

 

Has output in

No gas & no hi-freq

1.

Faulty trigger or hand/foot Amptrol

Stick mode

 

 

or connections.

but no output

 

 

 

in Tig mode

 

2.

Faulty Protection PC board or

 

 

 

 

bad connection to Control PC

 

 

 

 

board

 

 

 

3.

Losing trigger supply to Control

 

 

 

 

PC board

 

 

 

 

 

 

 

Gas & hi-freq are o.k.

1.

Faulty Control PC board

 

 

 

 

No output in both Stick and Tig

1.

Bad connection at P4 of Control

modes

PC board

 

 

 

2.

Faulty Control PC board

 

 

 

 

 

 

 

 

 

 

If all recommended possible areas of misadjustment have been checked and the problem persists, Contact your local Lincoln Authorized Field Service Facility.

CAUTION

If for any reason you do not understand the test procedures or are unable to perform the tests/repairs safely, contact your Local Lincoln Authorized Field Service Facility for technical troubleshooting assistance before you proceed.

PRECISION TIG 275

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Lincoln Electric IM702-A manual Symptoms, Course of Action, Output Problems

IM702-A specifications

The Lincoln Electric IM702-A is a versatile and innovative welding machine that has garnered attention for its advanced features and robust performance. Designed for various welding applications, the IM702-A is a go-to choice for professionals in the industry, offering precision, reliability, and ease of use.

One of the standout characteristics of the IM702-A is its advanced inverter technology. This allows for a lightweight and compact design, making it easier to maneuver in tight spaces compared to traditional welding machines. The inverter technology also contributes to energy efficiency, reducing power consumption without compromising on performance.

The IM702-A features a multi-process capability, enabling it to perform MIG, TIG, and Stick welding with ease. This versatility makes it ideal for a wide range of projects, from industrial manufacturing to home repairs. Users can seamlessly switch between different welding processes, enhancing productivity and streamlining workflow.

In terms of user interface, the Lincoln Electric IM702-A is designed with convenience in mind. It boasts a digital display that provides real-time information on welding parameters, making it easier for operators to monitor and adjust settings as needed. The intuitive controls are user-friendly, allowing even novice welders to achieve professional-quality results.

The machine also includes advanced weld control features, such as precise amperage and voltage adjustments. These controls ensure that users can achieve optimal settings for different materials and thicknesses, resulting in clean, strong welds. Additionally, the IM702-A is equipped with an automatic voltage adjustment feature, which helps maintain consistent performance under varying input conditions.

Durability is another key selling point for the IM702-A. Built with high-quality materials and engineering, this welding machine is designed to withstand the rigors of daily use in demanding environments. Its rugged construction provides reliability and longevity, ensuring that it remains a valuable asset in any workshop.

Lastly, safety is a priority in the design of the IM702-A. It includes several built-in safety features, such as thermal overload protection and a stabilized arc performance that reduces the risk of arc blow, protecting both the operator and the equipment.

Overall, the Lincoln Electric IM702-A stands out in the welding market due to its advanced technologies, multi-process capabilities, user-friendly interface, and robust safety features, making it an excellent choice for professional welders seeking high-quality performance and versatility.