Troubleshooting Information Table; Section 5 Troubleshooting - ESAB 453cc Instruction Manual

SECTION 5
CONDITION
Unit Inoperative A.
B. Poor or improper input (terminal board) connections.
C. Defective on/off switch on front panel -- replace.
D. Main transformer overheating. Also check for proper cooling, proper primary hookup,
E. Fan motor not operating -- check motor and leads.
F.
G
No Output - Fan A.
Running B. Poor connections at output terminals/work station -- check, tighten or replace.
C. Main transformer overheating -- thermal switches tripped due to restricted cooling air.
D. Solid-state breaker tripped due to current overload.
E. PC board defective or loose PC board connector(s) -- if loose, reinsert; if defective,
Limited Output or Low A.
Open-Circuit Voltage
B. Unit may be single phasing -- check incoming power for three phases.
C. Panel-Remote switch in Remote position and remote voltage pot disabled.
Erratic Weld Current A.
B. Loose welding cable connection (will usually get hot) -- tighten all connections.
C. Improper wire feeder setup.
D. Defective SCR in bridge rectifier.
E. PC board defective -- replace.
High Output, No A.
Voltage Control
No 115 Volt ac Output A.
Line Fuse Blows When A.
Power Source is First
Turned On
ACTION
No input power. Check main line (user's) switch fuses -- replace if needed.
or shorted turn on secondary.
Gound fault indicator "ON". - Check for cause and correct. Turn power switch "OFF"
then "ON" to reset.
Loss of primary phase. Check that LED on control PCB is lit. If not, find & replace
defective fuse.
Poor or improper electrical input -- check input connections on TB.
Temperature light on front panel will be lit. Let unit cool down,
replace.
Input voltage jumper links on terminal board improperly set -- check for proper voltage.
Poor output connections. Take apart, clean, and reassemble.
Welding cable size too small -- use correct cables.
PC board defective or loose -- reset and/or replace board.
Circuit breaker tripped. Check 42V CB1 and 115V CB2 -- Reset.
Shorted SCR in Main Bridge -- replace.
18
TROUBLESHOOTING