Tweco 130i Transarc Service Manual - Manual (Page 43)

TRANSARC 130i
Manual 0-5282 6-1 TROUBLESHOOTING
6.01 Basic Troubleshooting-Power Source Faults
The following table is a guide for analyzing problems and making repairs to the Power Source.
Fault Possible Cause Remedy
1 There is no weld output and
all front panel displays are
off
A The main Power Switch is
set to OFF
A Set main Power Switch to ON
B Line fuse is blown B Replace Line fuse
C The main Power Switch is
faulty
C Replace main Power Switch
D Faulty Power Inverter board D Replace Power Inverter board
E Faulty Control board E Replace Control board
F Faulty Display board F Replace Display board
2 There is no weld output and
all front panel displays are
off or flickering on & off
A The internal protection circuit
to shut the unit down if the
mains supply voltage is too
high has operated
A Check to see if mains supply voltage
is <274VAC. A generator with poor
voltage regulation may cause a
supply voltage in excess of 274VAC.
Connect Power Source to a supply
voltage <274VAC.
3 There is no weld output and
the yellow over temperature
light is on
A Unit has overheated A Allow unit to cool with fan running
until over temperature light
extinguishes
B Airflow inlet or outlet ducts
are blocked
B Remove blockages from airflow
ducts
C Fan does not operate C Replace fan. Check fan wiring header
is plugged securely into Control
board. Check fan wiring is not
damaged
4 Mode switch does not
change welding mode
A Faulty Display board A Replace Display board
5 The weld output does not
operate when the torch
trigger switch is depressed.
A Internal wiring fault A Check continuity of internal wiring
from8 pin control socket through to
boards
B Over temperature light is on B Allow unit to cool
C Trigger wires shorted to weld
voltage inside TIG torch
C Repair trigger wires in torch
D Trigger wires or torch switch
faulty
D Check & Repair
E Faulty Power Inverter board E Replace Power Inverter board
F Faulty Control board F Replace Control board
G Faulty Display board G Replace Display board
SECTION 6:
TROUBLESHOOTING