Lincoln Electric Ground Test Procedure for CV320-I, Problem Possible Cause What To Do

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TROUBLESHOOTING GUIDE (cont)

Problem

Possible Cause

What To Do

No wire feed, although arc voltage is present.

Defective wire feed motor or wire drive control PC board.

Measure the voltage between Red motor lead

(54)and the Green motor lead (53) when the wire inch push button is depressed. If this voltage is over 10V DC, replace the wire feed motor. If no voltage is registered, replace the wire drive PCB. (Refer PCB replacement procedure at end of Trouble Shooting Guide).

No control of wire feed.

Defective wire drive control PC board.

Replace PCB. (Refer PCB replacement procedure at end of Trouble Shooting Guide).

No wire feed and no arc voltage. Pilot light indicates input power to machine.

Over-temperature protection circuit actuated due to overload or short. Over- temperature light should be illuminated.

Faulty gun trigger switch or damaged control cable connected to gun trigger.

Defective control PC board.

Defective contactor.

Allow machine to cool down and reduce on time and/or wire feed speed.

Repair.

Refer Procedure for Replacing PC Boards at end of Trouble Shooting Guide, if no fault is detected in trigger-thermostat circuit.

Replace defective contactor.

Poor welding characteristics and/or cannot obtain full rated output as per nameplate.

Improper settings for wire feed speed and volts.

Faulty rotary switch either coarse control (on/off) or fine control.

Faulty pilot transformer.

Faulty main transformer.

Faulty rectifier.

Faulty choke.

Set controls correctly.

Replace rotary switch.

Replace.

Replace.

Replace.

Replace.

GROUND TEST PROCEDURE FOR CV320-I

Also see the LN21 wire feeder instruction manual

WARNING

This procedure is only suitable for applications using DC mega testers up to 500V.

Note: This procedure is for ‘machines as built’ many modifications could have taken place over the life of a particular machine, so details of this procedure may need to be ‘adjusted’ to suit these modifications.

For prompt service contact your local Lincoln Field Service Shop.

The insulation resistance values listed below are from Australian Standard AS1966.1.

ELECTRIC SHOCK can kill

1)Disconnect input cable from power outlet.

2)Disconnect all output cables (control & weld).

3)Remove the roof panel.

4)Jumper the three (3) AC terminals and the (+) & (-) terminals of the thre phase bridge rectifier (A total of five (5) places).

5)Jumper the four (4) meter terminals together.

6)Switch the fine control rotary switch to position one (1) & switch the coarse control rotary switch to position one (1).

7)Primary test: Connect one lead of the mega tester to the frame of the machine and the other lead to each of the three

(3)input conductors and to the main transformer primary leads L1A, L2A & L3A. Apply the test(s).

8)Welding circuit test: Connect one lead of the mega tester to

the frame of the machine and the other lead to the positive output stud. Apply the test. (Min resistance 1MΩ ).

9)Welding circuit to primary test: Connect one lead of the mega tester to the positive output stud and the other lead to each of the three (3) input conductors and to the main

transformer primary leads L1A, L2A & L3A. Apply the test. (Min resistance 10MΩ ).

10)Transformer thermostat test: Connect one lead of the mega

tester to the frame of the machine and the other lead to the positive output stud. Apply the test.(Min resistance 1MΩ ).

11)Remove all jumper leads.

12)Refit the roof panel.

If any problems are encountered, refer to your nearest Lincoln Field Service Shop.

IMA 574B

CV320-I

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Contents Subsidiary CV320-IElectric Shock can kill Cylinder may explode if Welders with Pacemakers WELDING, EMF and PacemakersMinimising Exposure Introduction Installation and UseMaintenance of the Welding Equipment ConformanceProduct Description InstallationOutput Polarity Connection Gun and CableOperating Instructions Welding Thermal Overload Protection Safety Precautions Routine MaintenanceCable Cleaning GeneralProblem Possible Cause Troubleshooting GuideProblem Possible Cause What To Do Ground Test Procedure for CV320-IAluminium Wire Machine Code Wire Size Solid WireCored Wire Parts List AP-80 General Assembly AP-80-C Description Qty General Assembly AP-80-C.1Description Control Panel AP-80-DWiring Diagram CV320-I LN21 Wire Feeder Parts List AP-68 Ref AG1346A General Assembly AP-68-CRef AG1346B General Assembly AP-68-C.1Wiring Diagram LN21 Item Part No Description Magnum Fastmate Guns AP-202-GMagnum Gun Replacement Parts AP-202-G.1 Industry Lincoln Ref No Qty Magnum Replacement PartsIndustry Lincoln Ref No Qty Mm Inches Industry Lincoln Ref No Qty InchesIndustry Lincoln Size Ref No Qty Mm Inches Industry Lincoln Wire Size Ref No Qty Mm InchesTelephone Fax 02 International Ph +61 2 Fax +61 2 Warranty

CV320-I specifications

The Lincoln Electric CV320-I is a versatile and robust constant voltage power source designed primarily for semi-automatic and automatic welding applications. This machine is widely appreciated for its reliability, efficiency, and cutting-edge technologies, making it a preferred choice in various industrial settings.

One of the standout features of the CV320-I is its advanced inverter technology. This innovative design allows for a more lightweight and compact machine while maintaining high performance levels. The inverter technology improves energy efficiency, resulting in lower operational costs over time. Moreover, its compact size makes transportation and handling easier, especially in job site scenarios where space is at a premium.

Another significant characteristic of the CV320-I is its arc stability. Equipped with sophisticated control circuitry, the machine delivers a consistent arc throughout the welding process. This leads to improved weld quality, reduced spatter, and a cleaner finish. The machine also features a wide voltage range, accommodating various welding processes such as MIG and TIG welding, making it versatile for different applications.

The CV320-I offers impressive output ratings, providing the power needed for heavy-duty tasks. It delivers excellent performance with a duty cycle suitable for continuous use, allowing operators to work longer without interruptions. Additionally, it includes quick disconnects for easy setup and breakdown, enhancing productivity.

Another crucial aspect of the CV320-I is its user-friendly interface. The control panel is intuitively designed, featuring clearly labeled knobs and settings that allow even novice operators to adjust parameters with ease. This simplicity enhances efficiency on the shop floor, reducing downtime associated with complicated setups.

The machine also offers a range of safety features, such as thermal overload protection and output voltage sensing, to ensure both operator safety and equipment longevity. The durable construction and high-quality components further contribute to the machine's ruggedness and reliability in various industrial environments.

In summary, the Lincoln Electric CV320-I is an exceptional welding power source that combines innovative technology, user-friendly design, and robust performance. Its inverter technology, arc stability, and safety features make it an ideal choice for demanding welding applications, ensuring satisfactory results for professionals in the field.
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