Thermal Arc ULTIMA 150, Руководство по обслуживанию

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SECTION 3: SERVICE TROUBLESHOOTING 14 Manual 0-2503
3.04 How to Troubleshoot the
Ultima-150 Power Supply
The Ultima-150 Plasma Welding Power Supply is rela-
tively simple to troubleshoot since it has a panel of indi-
cator lights that continually provide feedback to the user.
Under normal conditions, all active indicator lights are
green. Blinking lights, red lights, and off lights are indi-
cators of problems.
Should any light indicate a problem, refer to the appro-
priate troubleshooting section for that light. If more than
one light is faulty, complete testing procedures in the or-
der presented in this guide. Each subsection of this guide
is set up as follows:
X. Symptom (bold type)
1. Cause (Italic Type)
a. Check/Remedy (Text Type)
Once a problem has been corrected, repeat the steps in
Section 3.06 Basic Functions, to ensure that the complete
problem has been remedied and that the power supply
functions properly.
Troubleshooting the power supply has been organized
as follows:
Section 3.06 - Checking Basic Functions
Section 3.07 - AC Power Problems
Section 3.08 - Temperature Problems
Section 3.09 - Gas Problems
Section 3.10 - Coolant Problems
Section 3.11 - PILOT Problems
Section 3.12 - DC Power Problems
Section 3.13 - A/V Display Status Problems
Section 3.14 - Static Test Procedures
3.05 Preparing to Troubleshoot
Before beginning to troubleshoot, connect the following:
1. Connect incoming voltage.
2. Connect torch with correct torch parts installed. (Con-
sult appropriate torch manual for details, if required.)
3. Turn on Plasma and Shield gas supplies. Set both pres-
sure regulators to provide 35 psi.
4. Install optional remote or contact closure switch be-
tween TB1 terminals 3 and 4 (Weld Arc On). Closing
this switch turns weld arc on.
3.06 Checking Basic Functions
The following routine checks the basic functions of the
Ultima-150 Power Supply. Use this routine to verify that
the system is working correctly. Should any light fail to
display as described, refer to the appropriate trouble-
shooting section for that light and follow the instructions
provided.
PILOT ARC
PREVIEW ON
CURRENT
SET
A
A
CURRENT
0.5-15
5-150 PREVIEW
ARC
VOLTS
A / V
A
LIMIT
A
PANEL
REMOTE
A
COOL PILOT DC GAS TEMP AC
A
V
RANGE
10 12 1
2 3
A-01096
4 5 6 7
8
9
11
13 14
Figure 3-1 Indicator Lights Panel
1. Make sure Primary Power ON/OFF Switch is in OFF
position.
2. Set Pilot Arc ON/SET switch (1) to SET.
3. Set RANGE switch (2) to 5-150.
4. Set PANEL/REMOTE switch (3) to PANEL.
5. Place Primary Power ON/OFF Switch to the ON po-
sition. Adjust Plasma and Shield Gas Flow meters on
the front of unit to desired flow rate. Indicator lights
should be:
Indicator Light Display
AC (4) on (green)
TEMP (5) on (green)
GAS (6) on
COOLANT (7) on (green)
AV Display (8) on (00)
PILOT (9) off
DC (10) off
6. Press the Pilot Arc Current PREVIEW Switch (11) to
display the pilot arc's current set point. It is factory
set for 7 amps. Consult the torch manual for other
settings. To adjust the current set point, turn the Pilot
Arc CURRENT potentiometer (12) clockwise to in-
crease.