CUTMASTER 102
SERVICE
Manual 0-4998
5-18
Code displayed after START signal is activated,
during main transfer
1. Ferrite on Ribbon cable between Logic PCB J1 and
Main PCB J2 broken or loose
2. Ferrite on harness between J13 on Main PCB to J4 on
40A PCB broken or missing.
3. Wires SEC1 and SEC2 routed too close to U2 on 40A
PCB
4. 40A PCB needs to be replaced if earlier than rev AD
C. SHORTED TORCH FAULT. FAULT indicator
and 85 PSI LED are flashing at 5 cycles per
second.
This mode is a non-latched mode.
1. While using an Automation Torch at current settings
above 40 amps, the tip has contacted the work piece.
a) Check standoff height
2. Air restriction in torch resulting in low voltage during
pilot.
a) Check torch consumables for wear or debris.
3. Low voltage during cutting due to torch or consumable
problem.
a) Check torch consumables for wear or debris.
In all three cases, to reset the machine, remove the START
signal.
D. AC LED ON, TEMP LED OFF, GAS LED ON,
gas flowing, DC LED ON, Fault Indicator OFF,
No arc in torch.
1. Defective Main PCB 1.
a) Install jumper on Main PCB 1 between test point
GND1 to terminal TIP1.
b) Apply START signal. If Pilot starts, replace Main
PCB 1.
E. AC LED ON, TEMP LED OFF, GAS LED ON,
gas flowing, DC LED ON, Fault Indicator OFF,
Pilot Arc is intermittent.
1. Defective Main contactor W1.
a) Check W1 per Pre Power-Up checks.
2. Defective Logic PCB 3
a) Measure for 12VDC on Main PCB between test
Point GND1 to J2-8. If 12VDC is present, replace
Logic PCB 3.
3. Defective Main PCB 1.
a) Replace Main PCB 1.
F. INTERNAL ERROR. Fault Indicator and 90 PSI
Indicators are 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.
2. Defective Logic PCB 3.
a) Replace Logic PCB 3.
G. Fans MOT 1-3 do not turn ON after a START
signal is activated.
1. Defective Logic PCB 3.
a) Measure voltage at J1-14 to J1-25 on Logic PCB
3 for 12VDC. The voltage should drop to less than
2VDC after a START signal is active. If the voltage
remains at 12VDC replace the Logic PCB 3.
NOTE
When the unit is turned ON the cooling fans MOT
1-3 will remain OFF. (In earlier units MOT 1 will
turn ON for one (1) second and then turns OFF).
The fans will turn ON when a START signal (Torch
Switch, Remote Pendant switch, or CNC START)
is active and will remain ON for ten (10) minutes
after the START signal is removed. If an over tem-
perature condition occurs, the fans will continue
to run while the condition exists and for a ten (10)
minute period after the condition is cleared.
2. Measure for 12VDC on the Logic PCB 3 between J7-1
to J7-2 after the START signal is activated. If voltage
is not present replace Main PCB 1.
H. Fan MOT 1 does not turn ON after START
signal is activated. (MOT 2 & MOT 3 do turn
ON)
1. Defective Main PCB 1
a) Turn SW1 to OFF position. Turn SW1 back to ON
position and measure for 12VDC between J7-1 to
J7-2 before START signal is activated. If no voltage
is present, replace Main PCB 1.
2. Defective MOT 1
a) Check to be sure there is no physical obstructions
preventing MOT 1 fan blades from turning. Replace
MOT 1.
I. Either MOT 2 or MOT 3 do not turn ON after
START signal is activated.
1. Fan wires not connected to 40A PCB 5
a) Check and reconnect to 40A PCB 5.
2. Defective fan.
a) Check to be sure there is no physical obstruc
-
tions preventing fan blades from turning. Replace
respective fan.
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