Tweco 400 Ultra-Cut(May 2014) - Manual (Page 207)

ULTRA-CUT 100 XT/200 XT/300 XT/400 XT
Manual 0-5302 APPENDIX A-79
Starting with GCM2010 revision AG we measure inlet pressure of both plasma and shield gas at the inlet of the gas selection
manifold. If pressure is either too low or too high it sets 303 code. Earlier revision should not display 303 code. GCM2010
will display which gas is the problem and its actual pressure. The pressure at the point where it is measured should be in the
range of 100-135 PSI. Exception is for shield gas if the Gas switch is set to Pressure then the min pressure can be 85 PSI.
In the GCM 2010 Gas Control, on the main PCB, measure between test points TP1 (ground) and TP18 (shield) and TP19
(plasma) to measure the output of the pressure sensors. Voltage should be between 2.6V to 3.5V for 100-135 PSI. With
shield switch set to pressure low limit is 2.1V. Whichever gas is outside those limits will be the one causing the fault. Re-
member the pressure may drop during operation, set the code, then recover displaying L303 when you are measuring it.
• To test for faulty pressure sensor or inadequate gas supply with too much restriction. On the GCM 2010 place the Mode
switch to SET Plasma & Shield, turn the mechanical pressure regulators to max pressure and compare mechanical
gauges with the pressure display. If the pressure display doesn’t approximately match the gauge the sensor is likely
defective. If the gauge and the pressure display both show low pressure the supply to the gas control has too much
restriction. Perhaps the hose is too long or too small.
304 Gas Control not ready
This is the normal code when the gas control is conducting a purge at start up or when the process is loaded or changed
or when the plasma system has been disabled and is returned to “Enable”. If it is a GCM 2010 the Mode switch may not be
set to the RUN mode.
Code 304 combined with 204 & 402 when the Plasma Enable on the GCM 2010 gas control is set to disable can indicate a
fault in the CCM I/O PCB. When switching back to Enabled the pump will not restart so continues to display 4-2 indicating
no coolant flowing.
Normally the code during a disable should be 101. Circuits on the I/O PCB detect the Plasma Enable is disabled and send
signal to the microcontroller in the CCM. If a fault in the CCM prevents that signal from getting sent to the microcontroller
it doesn’t know the system is disabled so it sets these other 3 codes.
305 Gas Control Protocol Error
Application error or firmware incompatibility fault. Consult factory for latest firmware update. Possible electromagnetic
interference from the Arc Starter; inspect grounding, bonding, and isolation.
306 Not Used. This is one of the reserved codes from the earlier product.
307 Gas Control returns wrong command sequence.
Firmware incompatibility. Consult factory for latest firmware update. Possible electromagnetic interference from the Arc
Starter; inspect grounding; bonding; and isolation.
308 Mismatch between the CCM and gas control type.
The Auto-Cut XT CCM is designed to work with the GCM 1000 (AC 300 XT) or the built in gas control of the AC 200 XT. At-
tempting to use a GCM 2010 or DFC 3000 Auto Gas Control on an Auto-Cut will result in a 308 code. Similarly attempting
to use a CCM from an Auto-Cut XT in an Ultra-Cut XT supply will also result in a 308 code.
309 Gas Control Communication reply fault.
Relay doesn’t match what was requested. Possible firmware incompatibility. Consult factory for latest firmware update.
Possible electromagnetic interference from the Arc Starter; inspect grounding; bonding; and isolation.
310-313 DFC 3000 Auto Gas Faults.
These different codes displayed on the power simply indicate one of the Auto Gas modules (DPC for codes 310 or 311;
DMC for 312 and 313 could be either) is reporting a fault. You need to refer to the specific modules blinking red LED status
indicator and the Status code tables for more information.
GCM 2010 Status Codes
GCM 2000 has an LED on the front panel which blinks various codes.
GCM 2010 has LCD display which displays many of the Status messages. However, there are a few relating to communica-
tions that aren’t clear.