cutmaster 102
Manual 0-4998 5-13 SERVICE
E. UNDER PRESSURE FAULT. AC LED on,
FAULT INDICATOR and 60 PSI Indicator
flashing.
1. Air pressure source to unit is too low.
a) Set input pressure source to 90-100PSI.
2. Regulator set too low.
a) Adjust unit regulator to increase pressure.
3. Defective Logic PCB 1
a) Measure for 5VDC on the Logic PCB 3 between
J3-3 to J3-1. Replace Logic PCB 3 if voltage is
not present or low.
b) Measure for voltage on the Logic PCB 3 be-
tween J3-2 to J3-1. If the voltage is between
3-4.5VDC, replace the Logic PCB 3.
4. Defective Pressure Transducer
a) Replace Pressure Transducer
F. INPUT POWER FAULT. AC LED on, FAULT
Indicator and 65 PSI LED flashing.
1. INPUT VOLTAGE SELECTOR SWITCH (SW2)
set for incorrect voltage
a) Set SW2 to correspond to the primary line
voltage. Turn SW1 to OFF position then back
to ON position to clear the error.
2. Defective SW2
a) Check continuity
3. Primary line voltage out of tolerance range.
a) Connect unit to voltage with unit specifica-
tions. See section "2.04 Power supply speci-
fications". If using a generator, connect unit
to a wall receptacle to see if problem is cor-
rected.
4. Defective Main PCB 1
a) Measure voltage on Main PCB 1 between test
point GND1 to J2-22.
460 VAC input = approx 3 VDC
230 VAC input = approx 1.5 VDC
b) With all power removed from the unit, dis-
connect the ribbon cable from J2 connector
on Main PCB 1. Check continuity on PCB 1
between J2-34 to test point GND 1. With SW2
in LOW position continuity should be present,
with SW2 in the HIGH position. It should read
open
If not correct, replace Main PCB 1.
5. Defective Ribbon cable.
a) Check continuity of the ribbon cable connect-
ing between the Main PCB 1 and the Logic
PCB 3.
6. Defective Logic PCB 3.
a) Replace Logic PCB 3.
G. PARTS-IN-PLACE (PIP) FAULT. The FAULT
Indicator and 70 PSI LED flashing, After 20
seconds fan MOT1 turns on.
1. Shield Cup loose
a) Hand tighten the shield cup to close the PIP
switch.
2. Torch not properly connected to power supply
a) Insure torch ATC is securely fastened to unit.
3. Problem with torch and leads PIP circuit
a) Disconnect the Torch from the unit and check
continuity of torch PIP circuit at ATC pins 1
& 2. If open, check torch and leads for open
lead or PIP switch.
Negative / Plasma Lead
4 Torch Switch
3 Torch Switch
2 PIP
1 PIP
Pilot Lead
Art # A-08124
4. Defective Logic Pcb
a) Measure the voltage on Main Pcb between J2-17
to test point GND1 for 12VDC. If the voltage
is less than 2VDC, Replace Logic Pcb
5. Defective Main PCB 1
a) Replace Main PCB 1
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