CUTMASTER 102
Manual 0-4998
SERVICE
5-15
3) Defective Capacitor PCB 2.
a) Disconnect plug from J2 connector on Capacitor
PCB 2 and measure for 12VDC between J2-1 to
J2-2. If low or missing, replace PCB 2.
4) Defective 40A PCB 5.
a) Disconnect plug from J4 on 40A PCB 5. If fan MOT
1 turns OFF, replace PCB 5.
5) Defective Main PCB 1.
a) Replace PCB 1.
5.08 Pilot Arc Problems
A. AC LED ON, TEMP LED OFF, GAS LED ON.
Nothing happens when START signal is active.
No gas flow, DC LED OFF, fans MOT 1-3 do not
turn ON.
1. Problem in the torch and leads switch circuit (or remote
pendant or CNC signal missing).
a) For hand torches, check continuity of torch switch
circuit at ATC pins 3 & 4.
Negative / Plasma Lead
4 Torch Switch
3 Torch Switch
2 PIP
1 PIP
Pilot Lead
Art # A-08124
b) For machine torches using a remote pendant, check
continuity of Pendant Switch circuit
c) Check CNC START signal
2. Defective Logic PCB 3
a) Jumper on Main PCB 1 between J2-16 and test
point GND1. If gas does not flow, replace Logic
PCB 3.
b) With START signal active, measure voltage on Main
PCB 1 between test points GND1 to I_DMD1 for
1.4VDC. Replace PCB 3 if voltage is not present.
3. Defective Main PCB 1
a) With START Signal active, measure voltage on Main
PCB 1 between test points GND1 to I_DMD1 for
1.4 VDC. Replace PCB 1 if voltage is present.
B. SHORTED TORCH (OUTPUT) FAULT. Fault
indicator and 85 PSI Indicators are flashing at
1 cycle per second.
This is a Latched Failure Mode. After START signal is ac-
tivated, gas flows. After two seconds FAULT INDICATOR
flashes, and 85 PSI LED flashes. To reset the machine,
turn the unit OFF, identify and clear the problem and turn
back ON.
1. Upper O-Ring on torch head is in the wrong position.
a) Remove shield cup from torch; check position of
the upper o-ring and correct if needed.
Upper Groove
with Vent Holes
Must Remain Open
Threads
Upper O-Ring
in Correct Groove
Lower O-Ring
Art # A-03725
2. Torch start 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.
Art # A-08064_AC
Spring-Loaded
Lower End Fitting
Full Compression
Spring-Loaded
Lower End Fitting at Reset /
Full Extension
3. Worn or faulty torch parts
a) Inspect torch consumables parts. Replace if neces
-
sary.
4. Shorted Torch/leads
a) Disconnect torch from unit. With consumables
removed from the torch, check continuity of torch
at ATC, between negative/plasma lead connection
to pilot lead connection.
Содержание CUTMASTER 102
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