Tweco Troubleshooting Power Supply - Manual (Page 3)

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Digi-Key Part Number 922576-20-ND
Manufacturer Part Number 922576-20-I
Price Break
1
Unit Price
14.84000
Price
14.84
Digi-Key Part Number 922576-40-ND
Manufacturer Part Number 922576-40-I
Price Break
1
Unit Price
18.90000
Price
18.90
Power Supply Status Codes
Group 1, Process Codes
1-1
E-Stop Activated or Plasma Enable Off
Code 1-1 is activated by either an open circuit between TB1-1&2 (External E-
Stop) on CCM I/O PCB or Plasma Enable switched off. 1-1 is not a latched code,
it clears as soon as condition is fixed. Plasma Enable switches are on GCM 2010
and GCM2000 gas controls and the Remote HMI.
Causes for 1-1 code (see detailed descriptions below):
• GCM 2010 or GCM 2000 J5 on PCB plugged in wrong.
• Missing one phase of AC Input. Check for 3 phase power at input
terminals. Blown fuse, open connection.
• If D21, CNC_E-STOP LED, on CCM I/O board is not illuminated then
External E-Stop circuit is not satisfied. Either jumper TB1-1 & 2 (CCM
I/O board) is missing or user installed external E-Stop has a fault.
• If D21 is illuminated and D2, E-Stop_PS, is not on then Plasma Enable
switch on gas control (GCM 2000, GCM2010) or HMI not on or fault in
Plasma enable circuit. See quick test in section on Plasma Enable below.
• If both D21 and D2 are illuminated the CCM is defective.
GCM J5 plugged in wrong interrupts the Plasma Enable circuit. Some gas
controls have J5 header which is un-polarized allowing J5 to be reversed. Others
have 17 pin header but 16 circuit receptacle. These should be installed so circuits
1-16 are connected leaving pin 17 exposed. If instead, pin 1 is exposed Plasma
Enable is interrupted.
Missing phase.
Power to the control circuits comes from two of the 3 input phases. If either of
those two are missing there will be enough voltage to the CCM to power its CPU
but not the I/O board circuits including the E-Stop. Thus it will falsely detect E-
Stop. This condition can be confirmed by measuring the voltage at TP2 to TP1 on
the CCM’s I/O PCB (larger of the two boards). Voltage here is normally between
29 to 41 VDC. If a phase is missing it will about half the normal voltage.
If the 3
rd
phase is missing CCM will receive correct voltage but will correctly
signal missing phase. (code 2-1). If missing phase is due to blown fuse check for
shorted SCR in inverter(s). See code 2-1 for instructions.