The air low led is lit, The safety led is flashing, The safety led is lit and ready – Lincoln Electric PRO-CUT 55 SVM140-A User Manual
Page 45: Troubleshooting & repair, Caution
TROUBLESHOOTING & REPAIR
F-8
F-8
PRO-CUT 55
Observe Safety Guidelines
TROUBLESHOOTING GUIDE
detailed in the beginning of this manual.
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 for electrical troubleshooting assistance before you proceed. Call
1-888-935-3877.
PROBLEMS
(SYMPTOMS)
POSSIBLE AREAS OF
MISADJUSTMENT(S)
RECOMMENDED
COURSE OF ACTION
LED FUNCTION PROBLEMS
The Air Low LED is lit.
1. Make sure there is at least 70
psi (448 kPa) of air pressure
connected to the gas connec-
tion at the back of the Pro-Cut
55.
2. Press the purge button and set
the regulator to 70 psi (448
kPa). Do not reset the air pres-
sure while the air is off (not flow-
ing).
1. The pressure switch (S5) or
associated leads may be faulty.
See the Wiring Diagram.
2. The control board may be faulty.
Replace.
The Safety LED is flashing.
1. Make sure there is a Lincoln
PCT 80 torch connected prop-
erly to the Pro-Cut 55.
2. Make sure the torch consum-
ables are in place and in good
condition.
1. Perform the Torch Continuity
2. Check leads “N”, “E”, #364,
and #369 between the torch
receptacle and the output
board. See the Wiring Diagram.
3. The output board may be faulty.
Replace.
The Safety LED is lit and ready.
1. Press the reset button. If the
torch and consumables are
properly installed, the Safety
LED should turn off.
1. The reset button or associated
wiring may be faulty. See the
Wiring Diagram.
2. Perform the Torch Continuity
3. The control board may be faulty.
Replace.
4. If the machine operates normal-
ly with the Safety LED on, the
display board may be faulty.
Replace.