Tweco 75XL Plus PAK Master - Manuel (Page 41)

Manual 0-2807 5-5 SERVICE
C. Torch will not pilot when torch is activated (hand
pendant or CNC start signal)
1. RUN/SET/LATCH switch in SET position
a. Move switch to RUN position.
2. Faulty torch parts
a. Inspect torch parts and replace if necessary (re-
fer to Instruction Manual supplied with torch).
3. Gas pressure too high or too low
a. Set pressure to 60 psi (4.1 bar).
4. Faulty components in unit
a. Return for repair or have qualified technician
repair per Service Manual.
D. AC Power indicator ON; Fans operating;
No cutting output
1. Torch not properly connected to power supply
a. Check that torch leads are properly attached
to power supply.
2. Shield cup not properly installed on torch
a. Check that shield cup is fully seated against
torch head (do not overtighten if screwed on).
3. Faulty components in unit
a. Return for repair or have qualified technician
repair per Service Manual.
4. Faulty Torch
a. Return for repair or have qualified technician
repair per Torch Instruction Manual.
E. Low cutting output with no control
1. Incorrect setting of CURRENT (A) control
a. Check and adjusted to proper setting.
2. Faulty components in unit
a. Return for repair or have qualified technician
repair per Service Manual.
F. Limited output with no control
1. Poor input or output connections
a. Check all input and output connections.
2. Incorrect setting of CURRENT (A) control
a. Check and adjusted to proper setting.
3. Faulty components in unit
a. Return for repair or have qualified technician
repair per Service Manual.
G. Erratic or improper cutting output
1. Poor input or output connections
a. Check all input and output connections.
2. Incorrect type and size cable on input or output
a. Use proper type and size cables.
H. AC Power indicator ON; Cutting output
available; Fans not operating,
1. Fan blades blocked
a. Check and clear blades.
2. Faulty components in unit
a. Return for repair or have qualified technician
repair per Service Manual.
I. AC Power indicator ON; Fans operate; No
gas flow
1. Gas not connected or pressure too low
a. Check source for at least 70 psi (4.8 bar).
2. Gas supply pressure too high
a. Maximum of 125 psi (8.6 bar) inlet pressure
3. Faulty components in unit
a. Return for repair or have qualified technician
repair per Service Manual.
J. Torch cuts but not adequately
1. Drag circuit active
a. Lift tip from work piece.
2. Current set too low
a. Increase current setting.
3. Torch is being moved too fast across workpiece
a. Reduce cutting speed (refer to Instruction
Manual supplied with torch).
4. Excessive oil or moisture in torch
a. Hold torch 1/8 inch (3 mm) from clean surface
while purging and observe oil or moisture
buildup (do not activate torch).