Tweco PAK Master 150XL - Manual (Page 42)

CUSTOMER/OPERATOR SERVICE 5-6 Manual 0-2864
J. GAS LED indicator OFF
1. Gas pressure set too low
a. Adjust pressure
2. Faulty power supply
a. Return for repair or have qualified technician
repair per Service Manual.
3. No coolant flow.
a. Return for repair or have qualified technician
repair per Service Manual.
K. GAS LED indicator OFF, plasma and/or secondary
gas does not flow
1. Low plasma pressure
a. Check plasma pressure
2. Secondary supply turned OFF (or cylinder empty)
a. Check secondary supply
3. Blocked torch
a. Check torch parts.
4. Faulty power supply
a. Return for repair or have qualified technician
repair per Service Manual.
L. GAS LED Indicator flashing ON and OFF
1. Air in coolant lines
a. Check for proper coolant level at rear panel
gauge
b. Run pump for ten minutes to purge air from
the coolant lines before using the system.
M. Leaking torch connection
1. Loose torch connection
a. Check connection making sure connector is
fully seated.
N. Weak or sputtering pilot; CD stays on during pilot
1. Plasma gas pressure too high
a. Adjust pressure
2. Low OCV (normal 290-350 VDC) caused by improper
input voltage selection
a. Check input voltage connections
3. Faulty power supply
a. Return for repair or have qualified technician
repair per Service Manual.
O. Pilot arc ON; No main arc transfer (torch brought
within range of work)
1. Work cable not connected
a. Connect work cable securely
2. Faulty power supply
a. Return for repair or have qualified technician
repair per Service Manual.
P. AC LED indicator ON; GAS LED Indicator light
on when torch switch pressed; DC LED Indicator
light blinks
1. Shorted torch
a. Return for repair or have qualified technician
repair per Service Manual.
2. Faulty power supply
a. Return for repair or have qualified technician
repair per Service Manual.
Q. Main cutting arc will not shut off when torch
signal is deactivated
1. STANDARD/LATCH Switch in LATCH position
a. Place switch to STANDARD position.
2. Faulty power supply
a. Return for repair or have qualified technician
repair per Service Manual.
5.06 Power Supply Parts
Replacement
WARNING
Disconnect primary power to the system before dis-
assembling the torch, leads, or power supply.
A. Left or Right Side Panel Removal
1. Remove input power from the unit.
2. Loosen the two bottom screws in the slotted holes of
the desired Side Panel (viewed from the front of the
unit).
3. Remove the remaining screws which secure the Side
Panel to the Power Supply.
4. Pull the top of the Side Panel out and then lift up to
remove the panel from the Power Supply a short dis-
tance (see NOTE).