Tweco PAK 200i - Manual (Page 42)

PAK 200i
4-4 OPERATION Manual 0-5335
3. To set the Shield Gas pressure:
For Gas Shield:
a. Pull out the Shield Gas Pressure Control Knob.
b. Turn the knob to adjust gas pressure.
c. Push the knob back in to lock the pressure setting.
NOTE
Unless the installation includes gas selection equipment between the gas supplies and the control console, switch-
ing between gases requires disconnecting the gas supply line(s) from the control console rear panel and connecting
the appropriate input gases.
4.04 System Operation
This section contains operating information which is specific to the power supply.
WARNING
Frequently review the safety precautions in Section 1.
If the power supply cord has a plug or is not permanently connected to power, be sure the power to the outlet is
disconnected when inserting the plug into the outlet.
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.
Prior to starting the system determine the process to be used. The process is determined by the type and thickness
of the metal to be cut. Select and install the required consumables, connect the required gasses to the system.
1. Connect system to primary input power. An indicator will light on the rear panel when AC power is applied
to the unit. Place the Gas Control in the RUN mode.
�. Turn ON/OFF switch to ON (up) position. Fans start. System goes through the “Start up Sequence”.
• For about 10 seconds the decimal points of the 4 digit display blink from right to left.
• Next the 4 rectangular LED indicators illuminate all segments as a test.
• Then for about 6 seconds the display shows the letter “C” (code) followed by the CCM code version.
Example “C1.2.0” . During this time various input voltage tests are being performed. If a fault is found
its code is displayed and the start up sequence halts. Faults will show “E” or “L”.
• The coolant pump then starts and the Gas indicator blinks while the cutting gasses are purged for 20
seconds. Gas LED should stop blinking and gas flow (purge) stops unless gas control was left in the SET
mode or the coolant flow is not satisfied. At the same time the display shows the current control setting.
Example: “200”
• Once coolant flow is detected, usually within 5 seconds after the pump starts, the W1 input contactor
closes and the AC indicator lights. However if correct coolant flow was not obtained the contactors will
not close and the Gas LED will continue blinking until required coolant flow has been obtained. The Gas
LED will blink for up to 4 minutes after which code E404 will be displayed indicated proper coolant flow
was not established.