Thermal Dynamics cutmaster A60, Service Manual

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CUTMASTER A60
SERVICE 5-12 Manual 0-4982
J. AC LED ON, TEMP, GAS, DC LED's are
OFF, FAULT Indicator is flashing.
MIN
PRESSURE LED is flashing. Gas is not
flowing.
1. Gas supply not connected to unit
a) Connect gas supply to unit
2. Gas supply not turned ON
a) Turn gas supply ON
3. Gas supply pressure too low.
a) Set gas supply pressure to 95-120 psi
4. Air Pressure Control Regulator set too low.
a) Adjust AIR PRESSURE CONTROL to set
pressure as specified in section 4.02 Setting
Operational Pressure.
K. 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
L. MAX PRESSURE ERROR
MAX Pressure LED is lit.
1. Gas pressure set too high
a) Reduce gas pressure
2. Defective Logic PCB
a) Replace Logic PCB
M. 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 between J5-1 to
J5-3 for 12 VDC. If voltage is present, change
SOL 1
2. Defective Logic PCB
a) Measure on Main PCB between J2-12 to test
point GND1 for 12VDC. If voltage is present,
replace Main PCB.
3. Defective Main PCB
a) Replace Main PCB
N. 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 between J5-1 to
J5-3 for 12 VDC. If voltage is present, change
SOL 1
2. Defective Logic PCB
a) Measure on Main PCB between J2-12 to test
point GND1 for 12VDC. If voltage is present,
replace Main PCB.
3. Defective Main PCB
a) Replace Main PCB
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 mount-
ed gas solenoid SOL2 for 24VAC. If present,
replace SOL2.
5. Defective Main PCB
a) Measure on Main PCB between J2-20 to GND1
for less than 2VDC.
If voltage is 12VDC replace Main PCB
b) Measure on Main PCB between J2-11 to GND1
for less than 2VDC. If voltage is less than
2VDC replace Main PCB
6. Defective Logic PCB
a) Measure on Main PCB between J2-11 to GND1
for less than 2VDC. If voltage is 12VDC, re-
place Logic PCB.
O. Cannot adjust gas pressure in the SET
mode
1. Inlet gas pressure is too low
a) Increase inlet gas pressure to 95-120 psi
2. Faulty regulator
a) Replace Regulator