Lincoln Electric SVM149-A service manual Function Problems

Models: SVM149-A

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F-5

TROUBLESHOOTING & REPAIR

F-5

 

TROUBLESHOOTING GUIDE

 

 

 

 

Observe Safety Guidelines

 

 

 

 

 

detailed in the beginning of this manual.

 

 

 

 

 

 

 

 

PROBLEMS

 

POSSIBLE AREAS OF

RECOMMENDED

 

 

 

(SYMPTOMS)

 

MISADJUSTMENT(S)

COURSE OF ACTION

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

FUNCTION PROBLEMS

 

 

 

 

 

 

 

 

 

 

 

 

The machine powers up properly,

1.

Make sure the torch handle or

1.

Check all connectors and wires

 

but there is no response (no air flow

 

cable is not damaged or pulled

 

for loose or faulty connections.

 

or pilot arc) when the torch trigger

 

from the machine. Replace if

 

See Wiring Diagram.

 

 

 

 

 

 

 

 

 

is pulled. Only the power LED is lit.

 

necessary.

 

2.

Perform the Air/Gas

 

 

 

 

 

2.

Make sure

the air supply is

 

Solenoid Test.

 

 

 

 

 

3.

The control board may be

 

 

 

 

 

 

converted and operating

 

 

 

 

 

 

 

faulty. Replace.

 

 

 

 

 

 

properly.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

The machine powers up properly,

1.

Make sure the torch consum-

1.

Check all connectors and wires

 

but only air flows when the torch

 

ables are in place and in good

 

for loose or faulty connections.

 

trigger is pulled; no pilot arc is

 

condition.

Replace if neces-

 

See Wiring Diagram.

 

 

 

established.

 

 

sary.

 

2

Perform the Torch Continuity

 

 

 

 

 

 

 

 

 

2.

Set air pressure at 65psi.

 

and Solenoid Test.

 

 

 

 

 

3.

Make sure there are no kinks or

3.

Perform the Main Inverter

 

 

 

 

 

 

restrictions for air flow in the

 

Board Voltage and

 

 

 

 

 

 

torch cable.

 

 

Resistance Tests.

 

 

 

 

 

4.

Make sure that the correct size

4.

The control board may be

 

 

 

 

 

 

nozzle is being used. Must be a

 

faulty. Replace.

 

 

 

 

 

 

.028 orifice. Pro-Cut 55 size

 

 

 

 

 

 

 

 

nozzles will not work with the

 

 

 

 

 

 

 

 

Pro-Cut 25 system.

 

 

 

 

 

 

 

 

 

 

 

 

The machine powers up properly,

1.

CP leads to its terminal from the

1.

Reconnect the leads to its cor-

 

and cuts OK with 230 input

 

input to the inverter board are

 

rect terminal per the wiring dia-

 

applied. With 115 applied the pilot

 

loose or disconnected.

 

gram.

 

 

 

arc ignites but goes out when cut-

 

 

 

2.

Perform the Input Board Test.

 

ting commences.

Or, no pilot or

 

 

 

3. The input board may be faulty.

 

cutting when 115 input is supplied.

 

 

 

 

 

 

 

 

Replace.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

The air begins to flow when the

1.

Check the input voltage at the

1.

Check all connectors and wires

 

 

torch trigger is pulled. There is a

 

machine. Input voltage must

 

for loose or faulty connections.

 

very brief pilot arc. (Normal is 3

 

match the rating plate.

 

See Wiring Diagram.

 

 

 

Seconds.) The sequence is repeat-

2.

Make sure the torch

2.

Perform the Main Inverter

 

 

 

ed with subsequent trigger pulls.

 

 

 

 

consumable parts are in place

 

Board Voltage and

 

 

 

 

 

 

 

 

 

 

 

 

 

and in good condition.

 

Resistance Tests.

 

 

 

 

 

 

Replace if necessary.

3.

The control board may be

 

 

 

 

 

 

 

 

 

 

 

 

 

3. Make sure there are no kinks or

 

faulty. Replace.

 

 

 

 

 

 

restrictions for air flow in the

 

 

 

 

 

 

 

 

torch cable.

 

 

 

 

 

 

 

 

4. Make sure the air pressure is

 

 

 

 

 

 

 

 

set at 65psi.

 

 

 

 

 

 

 

5. Make sure that the correct size

 

 

 

 

 

 

 

 

nozzle is being used. Must be a

 

 

 

 

 

 

 

 

.028 orifice. Pro-Cut 55 size

 

 

 

 

 

 

 

 

nozzles will not work with the

 

 

 

 

 

 

 

 

PC 25 system.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

PRO-CUT 25

 

 

 

 

Page 39
Image 39
Lincoln Electric SVM149-A service manual Function Problems