Tweco Troubleshooting Power Supply - Manual (Page 10)

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1-5 Off the Plate (software not currently implemented)
Off the Plate feature, when activated (CCM CPU board’s SW5-2 on), detects
rapid rise in voltage when torch runs out of metal and cuts the arc off to prevent
bending and stretching the arc too far which can damage the torch parts. Status
code 1-5 is not a fault but instead indicates Off the Plate has functioned.
1-6
Transfer Timeout
Pilot time is limited to either 85 ms. CCM SW8-1 off (default for pierce
starting) or 3 seconds SW8-1 on (used for cutting over holes, expanded metal,
etc.). Arc must transfer before pilot time ends. Code 1-6 set if no arc transfer
(current in work lead) was sensed before pilot timed out.
Causes for 1-6 code:
• Torch too far from work,
• Cut current set too low for torch parts being used. Pilot current is set based
on cut current. If cut current is too low pilot current will be lower and
may not transfer at the height used for higher current consumables.
• Preflow pressure/flow too low.
• Remote Analog Current Control switches set wrong can also result in
lower than normal pilot current setting. See section on these switch
settings under section for code 1-4.
1-7
Tip Saver
Tip saver circuit is not currently implemented.
1-8
Possible Shorted Torch
CCM measures both electrode and tip voltage. If, while cutting, tip voltage rises
to within 30V of the electrode voltage CCM shuts off cut and sets 1-8 code.
Causes for 1-8 code:
• Gas Flow/pressure too low for consumable parts being used.
o If gas source pressure is not well regulated it is possible pressure
may be OK at times and drop too low at other times such as during
a cut.
• Cut current set too high for consumable parts being used.
• Physically shorted torch body between anode (tip) and cathode (electrode).
It is more likely a shorted torch body, depending on the resistance of the
short, will set code 2-7 (Unwanted Current) as that is measured prior to
starting cut while shorted torch is measured while cutting.
Group 2 codes, Power Supply Codes
2-1 Missing Phase.
System required 3 phase power will not operate on single phase. If phase L2 or L3
missing causes code 1-1 (see code 1-1 explanation). Phase L1 missing sets 2-1
code.
Causes for 2-1 code: