Thermal Dynamics A-08950, Руководство по обслуживанию

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CUTMASTER 12mm
SERVICE 5-16 Manual 0-5077
B. SHORTED TORCH FAULT
After torch switch is closed, gas flows for two (2)
seconds then momentarily shuts OFF then back ON,
FAULT INDICATOR flashes, and 85 PSI LED flashes.
1. Upper O-Ring on torch head is in the wrong posi-
tion.
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 sys-
tem. 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
necessary.
4. Shorted Torch
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.
Negative / Plasma Lead
4 Torch Switch
3 Torch Switch
2 PIP
1 PIP
Pilot Lead
Art # A-08124
C. AC LED ON, TEMP LED OFF, GAS LED
ON, gas flowing, DC LED OFF, Fault
Indicators OFF, No arc in torch
1. Defective Logic PCB 3
a) Measure voltage at Main PCB between test
point GND1 to J2-10.
Voltage is normally 12VDC and should drop to less
than 2VDC two (2) seconds after torch switch is de-
pressed. If voltage does not drop replace Logic PCB
b) While pilot arc is established, measure voltage
on Main PCB 1 between test points GND1 to
I_DMD1 for 1.4 VDC. If voltage is low or not
present, replace Logic PCB.
2. Defective Main PCB 1
a) Measure voltage at Main PCB 1 between test
point GND1 to J2-10.
Voltage is normally 12VDC and should drop to less
than 2VDC two (2) seconds after torch switch is de-
pressed. If voltage does not drop to less than 2VDC
for approximately one (1) second then replace Main
PCB.
D. AC LED ON, TEMP LED OFF, GAS LED
ON, gas flowing, DC LED ON, Fault
Indicators OFF, No arc in torch.
1. Defective Main PCB 1
a) Install jumper on Main PCB 1 between test
point GND1 to terminal TIP1.
b) Close torch switch. If Pilot starts, replace Main
PCB
E. AC LED ON, TEMP LED OFF, GAS LED
ON, gas flowing, DC LED ON, Fault
Indicators OFF, Pilot Arc is intermittent.
1. Defective Logic PCB
a) Measure for 12VDC on Main PCB between
test Point GND1 to J2-8. If 12VDC is present,
replace Logic PCB 3
2. Defective Main PCB 1
a) Replace Main PCB 1
F. 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