E-4

TROUBLESHOOTING

E-4

 

Observe all Safety Guidelines detailed throughout this manual

 

 

 

 

PROBLEMS

(SYMPTOMS)

POSSIBLE

CAUSE

RECOMMENDED

COURSE OF ACTION

Output control not functioning on remote

1.

Output control switch in wrong posi-

1.

Place switch in “Output Control

control.

 

tion.

 

Remote”.

 

2.

Faulty output control switch.

2.

Check and replace if found faulty.

 

3.

Faulty remote control potentiometer.

3.

Check and replace if found faulty.

 

 

 

 

(Voltage from 75 to 77 should be 3 to

 

 

 

 

5V).

 

4.

Leads or connections open in control

4.

Check all leads and connections,

 

 

circuit.

 

internal or remote, for continuity;

 

 

 

 

repair if necessary.

 

5.

Faulty firing or control circuit P.C.

5.

All light emitting diodes must be lit on

 

 

board.

 

both P.C. boards, except LED4 on

 

 

 

 

control/fault board. See P.C. board

 

 

 

 

troubleshooting guide.

 

 

 

 

 

Poor starting on CV(S) Sub-Arc.

1.

Improper procedures or setting of

1.

See instruction manual and proce-

 

 

controls.

 

dures.

 

2.

Poor electrode or work connection.

2.

Repair connections.

 

3

3CR reed switch inoperative.

3.

Check reed switch voltage leads 216

 

 

 

 

to 220. Idle voltage is about 8V; when

 

 

 

 

welding, voltage must go to zero.

 

4

Faulty control board.

4.

Replace. See P.C. board trou-

 

 

 

 

bleshooting guide.

 

 

 

 

 

Poor bead shape or erratic arc on CV(S)

1.

Improper procedures.

1.

See instruction manual and proce-

Sub-Arc.

 

 

 

dures.

 

2.

Defective 3CR reed switch.

2.

Check reed switch per item c. of pre-

 

 

 

 

vious Table above.

 

3.

Faulty control board.

3.

Replace. See P.C. board trou-

 

 

 

 

bleshooting guide.

 

4.

Defective main SCR bridge.

4.

Check and replace if defective.

 

 

 

 

 

Poor starting on CV(I) Innershield and

1.

Defective 3CR reed switch.

1.

Replace.

CV(S) Sub-Arc.

2.

Faulty control board.

2.

Replace.

 

 

 

 

 

Poor arc characteristics on CV(I)

1.

Mode switch in CV(S) Sub-Arc mode.

1.

Place mode switch in CV(I)

Innershield or other open arc processes.

 

 

 

Innershield mode.

 

2.

Defective main SCR bridge.

2.

Check and replace if defective.

 

 

 

 

 

Poor arc characteristics on all process-

1.

Defective control board.

1.

Check and replace if defective. See

es.

 

 

 

P.C. board troubleshooting guide.

 

2.

Defective firing board.

2.

Check and replace if defective. See

 

 

 

 

P.C. board troubleshooting guide.

 

3.

Defective main SCR bridge.

3.

Check and replace if defective.

 

 

 

 

 

Poor performance (including arc out-

1.

Insufficient output inductance.

1.

Use the 500 amp “+” output stud.

ages) while welding at low current (less

 

 

 

 

than 450 amps) when connected to 1000

 

 

 

 

amp “+” output studs.

 

 

 

 

 

 

 

 

 

Machine frequently shuts off while using

1.

Effective current demand well over

1.

Use the 1000 amp “+” output studs.

the 500 amp “+” output stud.

 

500 amperes.

 

 

 

 

 

 

 

 

 

 

 

 

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.

IDEALARC® DC-1000

Page 19 Page 21
Page 20
Image 20
Lincoln Electric IM420-D manual Innershield mode
Page 19 Page 21

IM420-D specifications

The Lincoln Electric IM420-D is a high-performance industrial welding machine that offers advanced features and technologies tailored for demanding welding environments. Designed for arc welding applications, the IM420-D is a versatile solution suitable for various welding processes, including MIG, TIG, and stick welding. This flexibility makes it an excellent choice for both professional welders and industries that require a reliable and efficient welding system.

One of the standout features of the IM420-D is its impressive output range. With a maximum output of 420 amps, this machine can handle thick materials and deliver deep penetration, making it ideal for heavy-duty applications. The machine also provides consistent arc stability, ensuring high-quality welds with minimal spatter. This functionality is essential in maintaining productivity and reducing the need for post-weld cleanup.

The IM420-D incorporates advanced digital control technology that enhances user experience and precision. The intuitive interface allows operators to quickly adjust settings for voltage, wire feed speed, and other parameters, ensuring optimal performance for diverse welding tasks. Additionally, the machine is equipped with a memory function that saves preferred settings, enabling quick setup for repetitive jobs.

Another notable characteristic of the IM420-D is its robust construction. Built to withstand the rigors of a manufacturing environment, the machine features a durable casing designed to protect key components from dust, moisture, and impact. This reliability results in fewer maintenance issues and extended service life, contributing to lower operational costs over time.

The IM420-D also includes a range of safety features that prioritize operator protection. Overheat protection, voltage fluctuation safeguards, and high-quality electrical insulation ensure a safe working environment, minimizing the risk of accidents during operation.

In conclusion, the Lincoln Electric IM420-D is an exceptional welding machine that combines high output, advanced digital technology, and robust design. With its user-friendly controls and safety features, it meets the needs of professional welders and industries seeking efficiency and quality in their welding operations. Whether for manufacturing, construction, or repair work, the IM420-D stands out as a top-tier choice in the welding equipment market.
Top Page Image Contents