Thermal Arc ARCMASTER 300 AC/DC, Руководство по обслуживанию

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300ACDC
11
ADVANCED TROUBLESHOOTING
11 – 4
2.2 E02 "Over-Temperature at
the secondary side"
Cause
Occurs when an over-temperature condition of the
secondary IGBT and diode are detected.
Verification/Remedy
a) Unit may be in thermal shutdown mode.

Review the rated duty cycle of the unit per
section 3.8. Exceeding the duty cycle can
damage the unit and void the warranty. Refer
also to section 1.6 for additional information.
b) Verify the ventilating condition.

Maintain a clear and unobstructed distance
of more than 30cm in the front and more that
50cm in the rear of the unit for ventilation pur-
poses.

Verify and maintain clean, dust free, front and
rear airflow paths. Cleaning and removing
dust from the front and rear panels once
every six months in a normal working envi-
ronment is recommended. Extremely dusty
environments will require more frequent
cleanings.
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 abnor-
mal 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 12.3.24 for the replacement
of FAN1.

Refer to section 11.5.3 for additional FAN1
tests.
d) Replace PCB6 (WK-5549).

Refer to section 12.3.6 for the replacement of
PCB6.
2.3 E03 "Transformer Over-Cur-
rent Failure"
Cause
Occurs when excessive current is detected flow-
ing 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 Sec-
tion 3.9.
b) Verify the secondary diode (D2-D7).

Refer to section 11.5.6 for the test, and
section 12.3.32 for the replacement of D2- D7.
c) Verify the H.F. unit (HF. UNIT1).

Refer to section 12.3.29 for the replacement
of HF.UNIT 1.
d) Verify the secondary IGBT (Q25-Q26).

Refer to section 11.5.8 for the test and Refer
to section 12.3.33 replacement of Q25 and
Q26.
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 12.3.30 for the replacement of
HCT1.