SYMPTOM

 

CHECK

 

 

 

The “SAFETY” LED is lit.

1.

The machine will not operate. The machine

 

 

senses that the nozzle is not in place, or the

 

 

operator could be exposed to dangerous volt

 

 

ages if the machine were allowed to operate.

 

2.

Check the nozzle to be sure it is tightly in place.

 

3.

Check the torch consumables to see if they are

 

 

melted together or are simply touching each

 

 

other. Tighten, clean or replace. See

 

 

“Suggestion for Extra Utility from the Pro-Cut

 

 

System”.

 

4.

Check the torch cable to see if it is cut or punc-

 

 

tured. Replace.

 

5.

Check to see that the torch is hooked to the

 

 

machine properly.

 

6.

Push the "SAFETY RESET" button, the LED

 

 

should go out. If the LED does not go out, the

 

 

thermal sensor in the torch head has actuated.

 

 

Note that the thermal sensor exists in the hand

 

 

held torches but not the machine or robotic

 

 

torches. This sensor prevents the torch from

 

 

melting, and should not trip in normal operation.

 

 

Wait several minutes until the torch head is cool,

 

 

and press the reset button. If the LED does not

 

 

go out, check step 2 again before proceeding.

 

 

Read the procedures section of this manual for

 

 

instruction in proper cutting technique.

 

7.

This circuit rarely trips on power up or because

 

 

of noise. If the circuit can be reset, it is Ok to

 

 

continue operation.

 

8.

Check the continuity between pins 1 & 3 in the

 

 

plastic amp connector on the torch assembly.

 

 

This is the 4-pin connector that plugs into the

 

 

power source. If the safety circuit is working

 

 

properly, there will be continuity when the nozzle

 

 

is in place and no continuity when the nozzle is

 

 

removed. When the nozzle is in place, there

 

 

must be continuity between pins 1 & 3 and the

 

 

torch pilot lead. Replace the torch if the continu

 

 

ity measurements are not as described, or else

 

 

replace the control board.

 

 

 

No OCV when 2 and 4 are closed.

1.

190 VAC across H1 and H2.

 

2.

250V SCR PC board positive/negative

 

3.

Check across 31/32 for 110 VAC.

 

4.

Replace Control PC board.

 

 

 

 

 

 

– 18 –

Page 18
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Lincoln 60 manual Symptom Check

60 specifications

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