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F-5

TROUBLESHOOTING & REPAIR

F-5

POWER FEED 10M

Observe Safety Guidelines detailed in the beginning of this manual.

PROBLEMS

POSSIBLE AREAS OF

 

RECOMMENDED

(SYMPTOMS)

MISADJUSTMENT(S)

 

COURSE OF ACTION

 

 

 

FUNCTION PROBLEMS (Continued)

The purge switch on the wire drive

1. Make certain the COLD

 

1. If the COLD INCH/GAS PURGE

unit does not activate the gas sole-

INCH/GAS PURGE switch is

switch is operating correctly and

noid, but gun trigger closure in the

operating properly.

 

the associated leeds are OK.

MIG or pulse modes does activate

 

 

The feedhad board may be

the solenoid. The LEDs are

2. Check for loose or faulty leeds

faulty.

steady green on the power source,

between COLD INCH/GAS

 

Control Box and wire drive unit.

PURGE switch and the wire

 

 

drive control board. See wiring

 

 

diagram.

 

 

 

 

 

 

The COLD INCH/GAS PURGE

1. Make certain the COLD

 

1. If the COLD INCH/GAS PURGE

switch does not turn on the wire

INCH/GAS PURGE switch is

switch is operating correctly and

drive motor but gun trigger closure

operating properly.

 

the associated leads are OK.

in the MIG or Pulse modes does

 

 

The feedhead board may be

activate the wire drive motor.

2. Check for loose or faulty leeds

faulty.

The LEDs are steady green on the

between the COLD INCH/GAS

 

power source, Control Box and

PURGE switch and the wire

 

wire drive unit.

drive control board. See wiring

 

 

diagram.

 

 

 

 

 

The voltmeter on the Control Box

1. Make sure the DIP switches are

1. Check leads #513 and #514 from

does not function properly even

configured correctly for the weld-

J85 on the feedhead board to the

though the STATUS LEDS are

ing polarity being used.

See

voltage sense PC board.

steady green.

Setting Dip Switches in the

 

 

Wire Drive in the Installation

 

 

section of this manual.

 

2. Perform the Voltage Sense

 

 

 

Board Test.

 

2. Check the #67 lead on the wire

3. The display board may be faulty.

 

 

 

drive unit. Make sure it is con-

 

 

nected to the motor gear box and

4. The feedhead control board may

 

also the voltage sense PC board.

 

be faulty.

 

 

 

 

3.Check the work sensing leads on

5. The Control Box control board

 

the Power Wave 455

power

 

may be faulty.

 

source. Check leads #202 (Neg.

 

 

 

output terminal) and #206 (pos.

 

 

output terminal). See Power

 

 

Wave 455 wiring diagram. If

 

 

esternal voltage sensing is uti-

 

 

lized, Check the #21 lead

 

 

between the 4-pin receptacle on

 

 

the front of the Power Wave 455

 

 

and the workplace.

 

 

 

 

 

 

CAUTION

If for any reason you do not understand the test procedures or are unable to perform the test/repairs safely, con- tact the Lincoln Electric Service Department at 1-888-935-3877 for electrical troubleshooting assistance before you proceed.

POWER FEED 10M SINGLE/DUAL

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Lincoln Electric SVM172-A service manual Function Problems