CutMaster True Service Manual - Victor Technologies - Europe

4. Shorted Torch
a) Disconnect torch from unit. With consumables
removed from the torch, Check continuity of
torch at ATC, between negative/plasma lead
connection to pilot lead connection.
Negative / Plasma Lead
4 Torch Switch
3 Torch Switch
2 PIP
1 PIP
Pilot Lead
Art # A-08124
C. AC LED on, TEMP LED off, GAS LED on,
gas flowing, DC LED off, Fault Indicators
off, No arc in torch
1. Defective Logic PCB
a) Measure voltage at Main PCB between test
point GND1 to J2-10.
Voltage is normally 12VDC and should drop to less
than 2VDC two (2) seconds after torch switch is
depressed. If voltage does not drop replace Logic
PCB
b) While pilot arc is established, measure voltage
on Main PCB between test points GND1 to
I_DMD1 for 1.4 VDC. If voltage is low or not
present, replace Logic PCB.
2. Defective Main PCB
a) a) Measure voltage at Main PCB between test
point GND1 to J2-10.
Voltage is normally 12VDC and should drop to less
than 2VDC two (2) seconds after torch switch is depressed.
If voltage does not drop to less than 2VDC
for approx one (1) second then replace Main PCB
D. AC LED on, TEMP LED off, GAS LED on,
gas flowing, DC LED on, Fault Indicators
off, No arc in torch.
1. Defective Main PCB
a) Install jumper on Main PCB between test point
GND1 to terminal TIP1.
b) Close torch switch. If Pilot starts, replace Main
PCB
CUTMASTER 25mm
E. AC LED on, TEMP LED off, GAS LED on,
gas flowing, DC LED on, Fault Indicators
off, Pilot Arc is intermittent.
1. Defective Logic PCB
a) Measure for 12VDC on Main PCB between
test Point GND1 to J2-8. If 12VDC is present,
replace Logic PCB
2. Defective Main PCB
a) Replace Main PCB
F. INTERNAL ERROR FAULT INDICATOR AND
90 PSI INDICATOR FLASHING
1. There has been a microprocessor problem.
a) Turn ON/OFF SWITCH to OFF position and
then turn to ON position to clear the error
5.10 Main Arc and Controls
Problems
A. Main arc will not establish, LED D59 on
Main PCB remains on while pilot arc is
striking the work piece.
1. Work Cable not connected.
a) Connect cable to work piece
2. Work cable open / broken.
a) Check continuity of work cable. Insure connection
of cable to clamp is secure.
B. Main arc transfers but current cannot be
adjusted
1. Defective Logic PCB
a) While main arc is transferred,measure voltage
on Main PCB between test points GND1 to
I_DMD1.
b) Adjust CURRENT CONTROL POTENTIOM-
ETER from maximum to minimum. Voltage
should vary from 4VDC at max to 1 VDC at
min
If voltage does not vary with CURRENT CONTROL
POTENTIOMETER, Replace Logic PCB
2. Defective Main PCB
a) Replace Main PCB
C. In LATCH mode, when the torch switch is
released the arc shuts off immediately.
1. Defective Logic PCB
a) Replace Logic PCB
Manual 0-5081 5-17 SERVICE