Tweco PAK 44G - Manual (Page 32)

CUSTOMER/OPERATOR SERVICE 26 Manual 0-2686
4. Faulty Power Supply
a. Isolate and replace component(s) per Service
Manual
D. Surging coolant
1. Air in System
a. Add coolant and run pump to remove air from
lines. Check for and correct leaks in coolant
system.
E. Gases do not flow when READY indicator is ON
1. Gas supply not on
a. Open valve
2. Faulty Power Supply
a. Isolate and replace component(s) per Service
Manual
F. Gases flow more than 2 seconds
1. RUN/SET switch in SET
a. Switch to RUN
2. Faulty Power Supply
a. Isolate and replace component(s) per Service
Manual
G. Can not set desired gas pressure
1. Empty gas cylinder
a. Replace
2. Faulty Regulator
a. Replace
3. Faulty Power Supply
a. Isolate and replace component(s) per Service
Manual
H. Gas does not flow when Torch Switch is pressed
1. Torch switch not connected
a. Check wires to plug, switch & receptacle
2. Torch switch not closing
a. Check for continuity when pressed
3. Faulty Power Supply
a. Isolate and replace component(s) per Service
Manual
I. No red DC POWER indicator
1. Pressure switch PS2 not satisfied
a. Check plasma gas pressure settings (Minimum
of 15 psi)
2. Pressure switch PS3 not satisfied
a. Check secondary gas pressure setting (Minimum
30 psi)
3. Faulty Power Supply
a. Isolate and replace component(s) per Service
Manual
Pilot Arc Problems
The Pilot Arc should start 2 seconds after the red DC
POWER indicator comes ON. If it does not, check the
torch parts to make sure they are in good condition and
properly assembled. Check to see if:
• There is any click sound inside the unit at the time
the pilot arc should start (2 seconds after pressing
switch).
• There is any indication on the ammeter.
• There is any light visible inside the torch.
A. No click sound inside the unit 2 seconds after
torch switch pressed
1. Faulty Power Supply
a. Isolate and replace component(s) per Service
Manual
B. No Pilot Arc (or intermittent)
1. Damaged (defective) torch parts
a. Replace
2. Dirty (wet) plasma gas
a. Purge
b. Check for leaks on hoses and fittings
c. Replace gas cylinder
C. Pilot pops and goes back inside torch
1. Blown pilot fuse (lFU)
a. Replace, check for shorted tip or electrode
D. No spark can be seen in torch
1. Faulty Power Supply
a. Isolate and replace component(s) per Service
Manual
E. Spark in Torch but no pilot (Ammeter indicates '0')
1. Broken conductor in torch lead
a. Replace lead