HIPower HW400A, Service Manual

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8.3 No Welding Arc
No
(Low)
8.4 No AC Output
Welding Output
Coil Voltage Welding Output Coil Voltage
Remove Lead Wires and measure
AU-AV, AV-AW, AW-AU:35V
AU-OA, AV-OA, AW-OA:20V
BU-BV, BV-BW, BW-BU:35V
When values displayed are as
per the page “output voltage (at no
load)”, the rotor and stator are
normal. Refer to the page “Output
Voltage (at no load)”.
Thyristor Damaged
Rectifier Damaged
Damaged PCB
(Main Controller)
Damaged Resistor
Weak contact of lead wires and
connector
Rotor Damaged
Stator Damaged
Initial Exciter Circuit Damaged
Refer to Resistance Value
NO
AC Output Coil
Voltage
(Measure at
Terminal Rest)
<Breaker at ON position>
<Regular Speed 3-Phase>
480V
<Regular Speed 1-Phase>
245V
Refer to “Output Voltage (at
no load)”
Rotor Damaged
Stator Damaged
Initial Exciter Circuit/Coils
Damaged
Refer to the page “Component
Parts Resistance Value”
Terminals/Receptacle Damaged
Breaker Damaged
Led Wire Damaged
YES
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