Tweco PAK Master 150XL - Manual (Page 41)

Manual 0-2864 5-5 CUSTOMER/OPERATOR SERVICE
B. AC Power LED ON; TEMP indicator ON
1. Unit is overheated
a. Allow unit to cool down for about 5 minutes.
Make sure the unit has not been operated be-
yond duty cycle limit.
2. Airflow obstructed
a. Check for obstructed air flow and correct con-
dition.
3. Fan(s) blocked
a. Check and correct condition
4. Input line voltage is below 75% of rated level
a. Check and connect to proper input power line
5. Faulty components in unit
a. Return for repair or have qualified technician
repair per Service Manual.
C. Torch will not pilot when torch switch is activated
1. RUN/SET switch in SET position
a. Move switch to RUN position.
2. Switch activated during 8 second inrush time
a. Release switch and wait until AC LED stops
flashing before activating switch again
3. Faulty torch parts
a. Inspect torch parts and replace if necessary (re-
fer to Instruction Manual supplied with torch).
4. Gas pressure too high or too low
a. Set plasma gas pressure to 65 psi (4.5 bar) and
secondary gas to 60 psi (4.1bar).
5. Faulty components in unit
a. Return for repair or have qualified technician
repair per Service Manual.
D. AC Power LED 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.
E. Low cutting output with no control
1. Incorrect setting of CURRENT 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.
3. Poor input or output connections
a. Check all input and output connections.
F. Erratic or improper cutting output
1. Poor input or output connections
a. Check all input and output connections.
2. Faulty torch parts.
a. Replace with new torch parts.
G. AC Power LED indicator ON; Cutting output
available; Fan(s) 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.
H. AC POWER LED indicator ON; Fans operate; No
gas flow
1. Gas not connected or pressure too low
a. Check source for at least 100-125 psi (68.9- 86.2
bar).
2. Faulty components in unit
a. Return for repair or have qualified technician
repair per Service Manual.
I. Torch cuts but not adequately
1. Current set too low
a. Increase current setting.
2. Torch is being moved too fast across workpiece
a. Reduce cutting speed (refer to Instruction
Manual supplied with torch).
3. 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)
4. Defective torch parts
a. Replace defective parts.