Tweco 500SP PowerMaster - Manual (Page 28)

POWERMASTER 320SP, 400SP, 500SP
3-2 March 16, 2007
!
WARNING
The mains cable has to be assembled into
the cable gland as shown in the picture.
The electrical technician has to make sure
that the cable gland is adjusted to the ex-
ternal diameter of the mains cable and the
mains cable is securely fastened in the
cable gland according to IEC 60974-1.
3.04 Voltage Change-over
For proper operation and to prevent damage to the
machine, the Voltage Input Select Switch must be set
according to the incoming AC line voltage.
If this switch is not set to the position that matches
the input line voltage, the Smart Logic will inhibit the
welding power source from turning on. The Voltage
Input Select Switch is located on the rear panel.
Art # A-07856
To set the Voltage Input Select Switch:
1. Rotate the locking screw 90 degrees.
2. Lift up the switch cover and set the switch to
the incoming AC line voltage.
3. Secure the switch cover.
!
WARNING
Do not alter the position of the Voltage
Input Select Switch when the ON/OFF
Switch is in the ON position as this will
cause two internal auxiliary fuses to
rupture. These fuses will have to be
replaced before the machine can operate.
!
WARNING
ELECTRIC SHOCK CAN KILL.
Open the main wall disconnect switch or
breaker, before removing any covers or
access panels on the welding machine.
Live voltage is still present even with the
front panel control switch OFF. Wait at least
10 full minutes after power has been
removed before removing any covers or
access panels to allow adequate time for
internal capacitors to discharge.