CUTMASTER 102
SERVICE
Manual 0-4998
5-14
O. AC LED ON, TEMP LED OFF, GAS LED ON,
Gas flows. DC LED & FAULT indicator OFF.
W1 contactor does not energize.
1. Defective W1 Contactor.
a) Measure for 24VAC between wire #5 to wire # 6 on
W1. If voltage is present replace W1.
2. Defective Logic PCB 3.
a) Measure voltage on Main PCB 3 between J2-9 to
GND1. If voltage is 12VDC, replace the Logic PCB
3.
3. Defective Main PCB 1.
a) Replace Main PCB 1.
P. AC LED ON, TEMP LED OFF, GAS LED ON,
Gas does not flow in SET mode using a hand
torch or a machine torch without remote
solenoid.
1. Defective gas solenoid (SOL1)
a) Measure voltage on Main PCB 1 between J5-1 to
J5-3 for 12 VDC. If voltage is present, change SOL
1
2. Defective Logic PCB 3
a) Measure on Main PCB 1 signal SOL_ON between
J2-12 to test point GND1 for 12VDC. If voltage is
present, replace Logic PCB 3.
3. Defective Main PCB 1.
a) Replace Main PCB.
Q. AC LED ON, TEMP LED OFF, GAS LED ON,
Gas does not flow in SET mode using a
machine torch with remote solenoid.
Disconnect the gas solenoid SOL1 from the back of the
ATC connector.
If Gas DOES NOT flow out of SOL1 when the unit is in
SET mode :
1. Defective gas solenoid (SOL1)
a) Measure voltage on Main PCB 1 between J5-1 to
J5-3 for 12 VDC. If voltage is present, change SOL
1
2. Defective Logic PCB 3.
a) Measure on Main PCB between J2-12 to test point
GND1 for 12VDC. If voltage is present, replace
Logic PCB 3.
3. Defective Main PCB 1
a) Replace Main PCB 1
If gas DOES flow out of SOL1 when the unit is in SET mode,
reconnect SOL1 to the ATC connector.
4. Defective torch solenoid.
a) Measure the coil terminals of the torch mounted
gas solenoid SOL2 for 24VAC. If present, replace
SOL2.
5. Defective Main PCB 1.
a) Measure on Main PCB 1 between J2-20 to GND1
for less than 2VDC.
If voltage is 12VDC replace Main PCB 1
b) Measure on Main PCB between J2-11 to GND1 for
less than 2VDC. If voltage is less than 2VDC replace
Main PCB 1.
6. Defective Logic PCB 3.
a) Measure on Main PCB 1 between J2-11 to GND1
for less than 2VDC. If voltage is 12VDC, replace
Logic PCB 3.
R. Cannot adjust gas pressure.
1. Inlet gas pressure is too low
a) Increase inlet gas pressure to 95-120 psi
2. Faulty regulator.
a) Replace Regulator.
If Air flow changes but display does not:
3. Faulty Logic PCB 3.
a) Measure on Logic PCB 3 for 12 VDC between TP3
to TP1. If voltage is low or not present, replace
Logic PCB 3.
4. Faulty Pressure Transducer.
a) Measure on Logic PCB 3 between J3-2 to TP1 while
adjusting the Pressure Regulator from Min to Max.
Voltage should adjust from 0-4.5VDC. If voltage
does not change, replace the Pressure Transducer.
5. Faulty Logic PCB 3.
a) Measure on Logic PCB 3 between J3-2 to TP1
while adjusting the Pressure Regulator from Min
to Max. Voltage should adjust from 0-4.5VDC. If
voltage does change, replace the Logic PCB 3.
S. AC LED ON, TEMP LED is OFF, GAS LED is
ON. Fan MOT 1 turns ON, plasma gas not
flowing. (Earlier revision units).
1) Open connection between J2 connector on Capacitor
PCB 2 to J3 connector on 40A PCB 5.
a) Check continuity.
2) Defective Main PCB 1.
a) Measure for approximately 325VDC on the CAPACI
-
TOR PCB 2 between MTH 1 to MTH 7. Replace if
no voltage present.
Summary of Contents for CUTMASTER 102
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Page 91: ...CUTMASTER 102 Manual 0 4998 PARTS LIST 6 9 A 07994_AB 1 4 2 3 5 6 7 8 9 10 12 11 10 13 ...
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