Thermal Arc 185 AC, Руководство по обслуживанию

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10-5
ARCMASTER 185 ACDC 200 ACDC
May 22, 2006
c) Verify the operation of the cooling fan, FAN1,
and replace it if necessary.
• Verify the condition of FAN1. Verify that there
are no broken or cracked fan blades and that
FAN1 is not producing any abnormal sounds.
• If broken or cracked FAN1 blades or abnormal
sounds are emanating from FAN1, replace
FAN1.
• Verify the operation of the cooling fan and
replace it if the condition of FAN1 is inactive.
Follow the instruction in section.
• Refer to section 11.3.24 for the replacement
of FAN1.
d) Replace PCB6 (WK-5549).
• Refer to section 11.3.6 for the replacement of
PCB6.
3. E03 "Primary Over-Current Failure"
Cause
Occurs when excessive current is detected
flowing into the primary side of the main
transformer.
Verification/Remedy
a) Confirm the operation of the machine within
the rated specification.
• Refer to the specification data sheet in Section
3.8.
b) Verify the secondary diode (D2, D4 and D5).
• Refer to section 10.07.4 for the test.
• Refer to section 11.3.32 for the replacement.
c) Verify the H.F. unit (HF. UNIT1).
• Refer to section 11.3.29 for the replacement
of HF.UNIT 1.
d) Verify the secondary IGBT (Q13).
• Refer to section 10.07.5 for the test.
• Refer to section 11.3.33 for the replacement.
e) Replace the Hall CT, HCT1.
NOTE
Pay special attention to installed direction of
HCT1. The Hall CT will not function properly if
installed in the incorrect direction.
Refer to section 11.3.30 for the replacement of HCT1.
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 2.09 for the recommended duty cycle.
b Replace PCB6 (WK-5549) and PCB13 (WK-
5569).
• Refer to section 11.3.6 for the replacement of
PCB6.
• Refer to section 11.3.13 for the replacement
of PCB13.
5. E11 "Main Supply Over Voltage"
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 11.5.2.
b) Replace PCB4 (WK-4819).
• Verify PCB4 (WK-4819) and replace it if
necessary. Refer to section 11.3.5.