CIGWELD TRANSTIG 300 AC/DC, Service Manual, Page: 65 / 134

1
3
ADVANCED TROUBLESHOOTING
13.
2.4 E04 "Torch Cable Failure"
Cause
The combined length of the torch cable and the
work cable is too long.
Verification/Remedy
a) Verify the rated duty cycles of the torch/work
cable and the power supply.
Only use appropriate sized torch cables
(length and capacity). The recommended
total combined length of the torch and work
cable is 50 feet.
Torch and work cable should not be "coiled"
during welding operations.
Maintain the duty cycle of the power supply.
Refer to section 2.8 for the recommended
duty cycle.
b) Replace PCB6 (WK-5549) and PCB16
(WK-5569).
Refer to section 1
4
.3-6 for the replacement of
PCB6.
Refer to section 1
4
.3-13 for the replacement
of PCB16.
13.
2.5 E11 "Main Supply Over Volt-
age"
Cause
Main supply voltage occurs at about 275V or
more.
Verification/Remedy
a) Verify main supply voltage.
Perform what is described in a section of
"Verification of the Power Supply Voltage".
Refer to section 1
3
.5.2.
b) Replace PCB4 (WK-4819)
Verify PCB4 (WK-4819) and replace it if nec-
essary. Refer to section 1
4
.3.4.
13.
2. 6 E12 "Main Supply Under Volt-
age"
Cause
Main supply voltage occurs at about 150V or less.
Verification/Remedy
a) Verify main supply voltage.
Perform what is described in a section of
"Verification of the Power Supply Voltage".
Refer to section 1
3
.5.2.
b) Replace PCB4 (WK-4819)
Replace PCB4, when abnormalities occur,
even if carries out the above-mentioned veri-
fications. Refer to section 1
4
.3.4.
13.
2. 7 E81 "Wrong Main Supply
Voltage"
Cause
The detection circuitry of main supply voltage is
abnormal.
Verification/Remedy
a) Verify main supply voltage.
Perform what is described in the section
"Verification of the Power Supply Voltage".
Refer to section 1
3
.5.2.
b) Confirm a secure connection of the harness
wired between CN2 on PCB3 (WK-5548) and
CN1 on PCB21 (WK-4917)
Re-install the harness with a secure connec-
tion.
Contact the manufacturer if you find any bro-
ken connectors or damaged wiring harness.
c) Verify PCB4 (WK-4819) and replace it if neces-
sary
Check whether there are any abnormalities
on the appearance of PCB4.
Replace PCB4. Refer to section 1
4
.3.4.
June 30, 2008 13-5
SERVICE MANUAL TRANSTIG 300 AC/DC