Tweco PAK 200i - Manual (Page 130)

PAK 200i
A-50 APPENDIX Manual 0-5335
103 Lost Pilot
Code 103 occurs when Pilot has ignited as sensed by the pilot current sensor on the Pilot board , but went out
on its own while CNC Start is still active before the pilot timeout (85 ms. or 3 sec.).
Possible causes:
• Preflow gas pressure too high, for manual gas controls check cut charts for proper setting. For DFC 3000
check that the process is correct for the consumables.
• Cutting current set too low for the torch parts being used. Pilot current level is automatically set based on
the cutting current. A low cutting current results in a lower pilot current that may not be able to sustain
a pilot for higher current torch parts.
• Remote Analog Current Control switches set wrong can also result in lower than normal pilot current
setting. See section on these switch settings under next section for code 104.
• Broken torch pilot wire.
• Defective Inverter module puts out less current than it’s set for.
104 Transfer Lost
Arc transferred to metal for at least 50 ms. then went out.
Causes for 104 code:
• Cut demand set much lower than recommended for torch parts, i.e. 100A consumables in torch but cut
current set for 30 or 50A (or zero). Current may be too low to keep arc on.
• Torch standoff too high for cutting process being used.
• Plasma gas flow too low due to a leak somewhere between the plasma regulator or the DPC 3000 and the
torch. Check for leaks.
• Remote analog current control switches set wrong.
o If remote analog current control is being used, SW8-2 (CCM CPU PCB) is on and SW11 (CCM I/O
PCB) is set to “A” (down) position, but no analog voltage connected to TB1-10 or J15-30 (CNC cable)
then cut demand will be zero, pilot will be weak, depending on torch height it may still transfer but
will immediately go out.
o If remote analog current control is not being used but either SW11 is set to the down position or SW8-2
is on also results in zero cut demand.
o If system is Auto-Cut XT, current control is an analog voltage from the GCM 1000 XT or the AC 200
XT front panel pot. The current control setting will be shown on the front panel 4 digit display. SW8-
2 should be off and SW11 set to up position. With pot at max, check for 3.3V on CCM I/O PCB TP9
(TP1 common). While turning the pot toward minimum TP9 voltage should vary linearly to zero V.