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PRO-CUT TROUBLESHOOTING FLOWCHART
START
PRO-CUT 55
Turn on
Wait 5
seconds
Is green power | N | ||
LED is only one lit |
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Y |
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Press PURGE button, set
pressure to 70psi, then release. If no air flow from torch, perform Gas Solenoid Test.
Pull gun trigger
and hold
Does preflow gas | N |
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flow from torch? |
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After 2 seconds of | N |
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preflow, does pilot |
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arc start? |
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Y |
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Is pilot arc smooth | N |
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and continuous? |
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Y |
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Will arc transfer | N |
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to work piece? |
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Y |
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Make sure machine | Are all LED’s | N | ||
reconnect is properly |
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flashing? |
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set for the input voltage |
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| Perform the Primary |
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| Power Board |
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| Resistance Test |
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| Perform the |
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| Auxiliary |
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| Transformer Test |
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| Perform the |
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| Input Rectifier |
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| Test |
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Make sure torch is |
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| Output board |
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connected properly, |
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then perform the |
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Trigger Circuit Test |
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Check torch cable for |
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| Electrode Solenoid | ||||
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| Torch Continuity |
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kinks or restriction |
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to air flow |
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Disassemble torch | Perform the Torch | Consumables may | ||||||||
check for oil and/or |
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water contamination | be worn. Replace. | |||||||||
Solenoid Test. | ||||||||||
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| Make a short cut and pull |
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Make sure clamp |
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is secured to work |
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Are all LED’s | N | Are all LED’s | N |
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lit? |
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Y |
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| Connect air supply, |
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The microprocessor |
| Perform the |
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| Clean or replace | ||||||||||
| Auxiliary |
| check air pressure |
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is faulty, replace |
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| consumables | |||||||||||
| Transformer Test |
| sensor |
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the control board |
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| Perform the |
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| Low Voltage |
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| Circuit Test |
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| Perform the | |||||||
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| Test |
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| Torch Continuity | ||||||
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| and Solenoid Test | |||||
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| Check leads "N", "E", #364, | |||||||
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| Press | ||||||||||
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| & #369 between the torch | ||||||||||
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| Reset button | ||||||||||
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| receptacle and the | ||||||||
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| output board |
Choke may be shorted. Replace.
Replace the output board.
Does
arc go out within N 5 seconds?
System is functional. If
Y performance problems exist, see performance
recommendations
N
Thermal LED?
Y
Thermostats tripped. Leave machine on and allow to cool. Make sure fans are functioning.
If problems persist, turn machine off and blow out inside. Make sure air louvers are not blocked. If thermal LED never turns off, check thermostats and leads. Control board may be faulty. If machine operates normally while thermal LED is lit, the display board may be faulty.
Contact Lincoln
Electric Service
Department