Thermal Dynamics A60 CUTMASTER Service Manual

CUTMASTER A60
SERVICE 5-10 Manual 0-4982
D. All front panel indicators are OFF, fans
do not run. Main Contactor W1 does not
close.
1. Primary power not connected.
a) Check that cable is connected to primary
power.
2. Primary line fuse/breaker is blown/tripped.
a) Replace fuse or reset breaker.
3. Defective ON/OFF SWITCH
a) Check continuity
4. Defective Main PCB
a) Measure Main PCB power supply voltages at
the following test points
GND1 to +12V = 12VDC
GND1 to +48V = 48 VDC
Replace Main PCB if not correct
5. Defective Ribbon Cable
a) Check continuity
6. Defective Logic
a) Replace Logic PCB
E. INPUT POWER FAULT.
AC LED on, FAULT Indicator and 65 PSI LED is
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 specifi-
cations". If using a generator, connect unit to a
wall receptacle to see if problem is corrected.
4. Defective Main PCB
a) Measure voltage on Main PCB 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. Check continuity 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 assembly
5. Defective Logic assembly
a) Replace Logic PCB
F. PARTS-IN-PLACE (PIP) FAULT. The
FAULT Indicator and 70 PSI LED is
flashing.
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) Check continuity of torch PIP circuit at ATC
pins 1 & 2.
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
a) Replace Main PCB

Thermal Dynamics A60 CUTMASTER Specifications

General

Brand	Thermal Dynamics
Model	A60 CUTMASTER
Category	Welding System
Language	English