10-8
May 22, 2006
ARCMASTER 185 ACDC 200 ACDC
10.04 Verification and Remedy to Failures
without Indication Codes
1. “Cooling Fan Failure” (Fan is not rotating.)
Cause
Occurs when the cooling fan (FAN1) is
defective, damaged or the driving voltage is
incorrect.
Verification/Remedy
a) Verify the cooling fan, FAN1.
•
Inspect the condition of the fan blades and all
peripheral parts. Clean the fan blades and all
peripheral parts if covered with dust. Cleaning
and removing dust from the fan blades once
every 6 months in a normal environment is
recommended. Extremely dusty environments
will require more frequent cleanings.
•
Verify that there are no wiring harnesses
entangled inside the fan, confirm that the
harnesses do not have any brakes in the wire
or damaged connectors.
•
Replace wiring harnesses if you find any
broken connectors or damaged wiring
harnesses.
•
Replace the fan if there are any broken, cracked
or missing fan blades.
•
Refer to section 11.3.24.
b) Verify the wiring harness between the cooling
fan (FAN1) and CN11 on PCB3 (WK-5548).
•
Confirm a secure connection of the harness
to CN11 on PCB3.
c) Verify the drive circuitry of the cooling fan
(FAN1) on PCB3.
•
Verify the drive circuitry of the cooling fan
(FAN1) on PCB3.
•
Refer to section 10.07.1.
•
Replace PCB3 if necessary.
•
Refer to section 11.3.4
2. “Gas Valve Failure” (No Gas flow through unit)
Cause
Occurs when the gas valve (SOL1) is defective,
damaged or the driving voltage is incorrect.
Verification/Remedy
a) Confirm that TIG welding is selected on the
welding mode.
•
Do not change welding modes while welding.
•
Only change welding modes when the unit is
idle (torch switch OFF).
•
Verify the setting of Pre-flow and Post-flow
on the front panel.
•
If the Pre-flow or Post-flow time is set to 0
seconds, change them to higher setting.
b) Verify the layout of the gas hose.
•
Confirm that the hose is securely connected
into the fitting at the inlet and the outlet.
Confirm that the layout of the gas hose so that
it is not bent or kinked. Confirm there are no
breaks, burns or holes in the hose.
•
Confirm the layout of the TIG torch gas hose
and that the hose adapters are properly
connected.
c) Verify the wiring harness and connection of
gas valve (SOL1) and CN11 on PCB3 (WK-
5548).
d) Verify the drive circuitry of the gas valve
(SOL1).
•
Verify the drive circuitry of the gas valve
(SOL1).
•
Refer to section 10.07.2.
•
Replace PCB3, when abnormal.
•
Refer to section 11.3.4.
e) Replace the PCB6 (WK-5549).
•
Refer to section 11.3.6.
Summary of Contents for 185 AC
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