Tweco PAK 44G - Manual (Page 33)

Manual 0-2686 27 CUSTOMER/OPERATOR SERVICE
2. Loose connection
a. Repair
3. Faulty Power Supply
a. Isolate and replace component(s) per Service
Manual
F. No gouging arc
1. Work cable not connected
a. Connect
2. One leg of three-phase primary out
a. Check all three input phases for voltage
3. Faulty Power Supply
a. Isolate and replace component(s) per Service
Manual
Main gouging Arc Problems
Once the gouging arc is established, the gouging current
should be equal to the setting of the CURRENT adjust
knob (unless the remote current control is in use). If it is
not, there is a problem in the current regulating circuit as
follows:
A. Unit only puts out minimum current (150 A)
1. Fuse 2FU Blown
a. Replace
2. Fuse blows again
a. Refer to Service Manual
3. Relay CSR not closing (pilot arc remains on during
cut)
b. Loose wire on toroid (T4) - tighten
4. Faulty Power Supply
a. Isolate and replace component(s) per Service
Manual
B. Unit only puts out maximum current (400 + A)
1. Faulty Power Supply
a. Isolate and replace component(s) per Service
Manual
C. Unit can only put out about 275 amperes maxi-
mum current
1. Faulty Power Supply
a. Isolate and replace component(s) per Service
Manual
Cut Quality begins OK but deteriorated during
the gouging process.
A. Deteriorating Cut Quality
1. Frozen CO2 Regulator
a. Add heater
b. Replace with High Flow Regulator
2. Cylinder not delivering
a. Manifold several gas cylinders together
If the torch parts life is short, check:
A. Short Torch Parts Life
1. Misuse of torch
a. Use torch with ratings for current and work
thickness
2. Incorrect gas pressure
a. Check and correct
3. Inadequate Coolant Flow
a. Clean Filter
4. Faulty Power Supply
a. Isolate and replace component(s) per Service
Manual
B. Discolored Electrode
1. Contaminated gas
a. Check plasma gas system for leaks
2. Gas hoses switched
a. Check
1. Faulty Power Supply
a. Isolate and replace component(s) per Service
Manual