Thermal Dynamics Cutmaster 82, Service Manual

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cutmaster 82
SERVICE 5-14 Manual 0-4980
H. TIP MISSING FAULT. The FAULT Indicator
and 80 PSI LED is flashing. Gas solenoid
cycles on and off.
1. Torch Shield Cup is loose.
a) Tighten shield cup by hand. Do not over
tighten.
2. Torch tip, electrode, or starter cartridge missing.
a) Turn off power supply. Replace missing
part(s).
3. Starter Cartridge is stuck.
a) Turn off power supply. Bleed down the system.
Remove the shield cup, tip,start cartridge and
electrode. Check the lower end unit of the
start cartridge for free movement. Replace
the cartridge if the lower end unit does not
move freely.
4. Open conductor in torch leads
a) Check continuity
5. Defective Main PCB
b) Measure voltage at Main Pcb between J2-2
to test point GND1 for 12VDC. If voltage is
present, replace Main PCB
6. Defective Logic PCB
a) Replace Logic PCB
I. AC LED on, yellow TEMP LED is on, red
FAULT Indicator is flashing.
1. Air flow through unit is restricted
a) Provide adequate airflow. See Ventillation
Clearance Requirements section 2.04.
2. Exceeded duty cycle of the power supply.
a) Allow unit to remain on, but at idle, with fan
running to cool power supply. See Power Sup-
ply Specifications section 2.04 for duty cylcle
information.
3. Fan(s) not turning
a) Measure voltage at plug between J7-1 to J7-
2 and between J81 to J8-2 on Main Pcb for
12VDC If voltage is present replace fan.
4. Defective Main PCB
a) Measure voltage at plug between J7-1 to J7-
2 and between J8-1 to J8-2 on Main Pcb for
12VDC. If voltage is missing at either recep-
tacle, replace Main PCB.
5. Defective Logic PCB
a) Replace Logic PCB
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 95-120psi
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