Tweco 100 Auto-Cut - Manual (Page 66)

OPERATION 4-6 Manual 0-4764
4.05 System Operation
This section contains operating information which is specific to the power supply.
WARNINGS
Frequently review the safety precautions in Section 1.
Disconnect primary power at the source before assembling or disassembling power supply, torch parts, or torch
and leads assemblies, or adding coolant.
It is not enough to simply move the ON/OFF switch on the unit to OFF position when cutting operations have been
completed. Always open the power supply disconnect switch five minutes after the last cut is made.
1. Connect system to primary input power.
2. Turn ON/OFF switch to ON (up) position. AC Lamp turns ON. Fan and coolant pump turn on. There
is a start-up purge of gas through the system.
POWER
ON
OFF O
I
OFF
O
Art # A-04842
3. Check the AC lamp. If lamp is ON, AC input power is present in the power supply.
Circuitry in the power supply monitors the status of various conditions. If the circuitry detects a situation
requiring operator attention, the status lamp on the control panel flashes a 2-part code to indicate a code
group and then a particular condition within the group. After 4 seconds, the sequence repeats.
Example: Lamp flashes 4 times; the condition is in group 4. After a 1.2 second delay, the lamp blinks 3 times;
the status code is 4-3. After a 4-second delay, the lamp repeats the sequence until the condition is corrected.
Some conditions can be active indefinitely, while others are momentary. The power supply latches momentary
conditions; some momentary errors can shut down the system. The lamp may show multiple conditions in
sequence; it is important to recognize all possible conditions that may be displayed. The Error Code section
provides explanations of status codes.
4. Place RUN/SET switch to SET mode.
a. Gases flow to set pressures.
5. Place RUN/SET switch to RUN mode.
a. Gas flow stops.
6. Protect eyes and start torch.
a. Gas pre-flows starts.
7. After gas pre-flow:
a. Power supply enabled. DC lamp turns ON.