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TROUBLESHOOTING
4-4
Manual 0-2747
C. Pilot Arc Test
1.
Activate the torch (press torch switch on the
handle, START signal from CNC or press the torch
switch on the Remote Pendant) and note the fol-
lowing:
•
Gas flows.
•
GAS indicator turns ON.
•
After preflow delay DC indicator turns ON.
•
Pilot arc established.
This completes the Pilot Arc Test. If the above are all cor-
rect then proceed to paragraph 'D'.
If the above does not function as noted then note the
symptom and proceed to Section 4.07, Pilot Arc Problems.
D. Main Arc Test
Press the Torch Switch to establish a pilot arc.
Bring the torch to within 1/8"-3/8" (3-9 mm) of the work-
piece to establish the main cutting arc, and note the fol-
lowing:
•
Main cutting arc starts
•
Pilot Relay opens
This completes the Main Arc Test. If the above are all
correct then the equipment should be operating properly.
If problems still persist then contact Technical Services.
If the above does not function as noted then note the
symptom and proceed to Section 4.08, Main Arc Prob-
lems.
4.06 Main Input and Internal Power
Problems
Locate your symptom below:
A. Main power line fuses blow as soon as main
disconnect is closed
1. Input power cable installed incorrectly
a. Refer to Operating Manual 0-2746, Section 3.07
and connect input cable.
B. Main Power line fuses blow when unit is pow-
ered on
1. Input voltage selection incorrect for the main input volt-
age
a. Refer to Operating Manual 0-2746, Section 3.06
and select proper input voltage
2. Single phase jumper wire installed incorrectly
a. Refer to Operating Manual 0-2746, Section 3.07
and check jumper wire installation.
3. Faulty Input Bridge
a. Test Input Bridge per Section 4.09-D; repair as
necessary.
4. FET/Heatsink Assembly faulty
a. Check per Section 4.09-I; repair as necessary.
C. Fan does not operate; AC indicator on front panel
of power supply is OFF
1. Front Panel ON/OFF switch in OFF position
a. Place switch to ON position.
2. Main power disconnect not closed
a. Close main power disconnect.
3. Main power line fuses blown
a. Replace main power line Fuses.
4. Defective input power cable
a. Replace input power cable.
5. Improper input power line connections inside Power
Supply
a. Refer to Operating Manual 0-2746, Section 3.07
and correct if needed.
6. Fuse blown inside Power Supply
a. Replace internal Fuse.
7. Line voltage above 10% tolerance (overvoltage protec-
tion)
a. Reduce line supply.
8. Faulty Auxiliary Transformer (refer to Appendix 10,
36 VAC Circuit Diagram)
Measure for 36 VAC on Logic/Gate PC Board from
J1-1 to J1-5.
a. If voltage is not present, replace the Auxiliary
Transformer.
9. Faulty Logic/Gate PC Board (refer to Appendix 10, 36
VAC Circuit Diagram)
Measure for 36 VAC on Logic/Gate PC Board from
J3-1 to J3-3.
a. If voltage is not present, replace the Logic/Gate
PC Board
Содержание Pak Master 75XL Plus
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