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Insulation Resistance Test with Continuity tester (Power must be turned off)
(a) Before checking insulation resistance of the external circuit with a continuity tester, disconnect
(b) Conduct the insulation resistance test on the inverter main circuit only. Do not conduct the test on
(c) To check the control circuits for continuity, use a multimeter (high resistance range). Do not use a
wires from all inverter terminals so that test voltage is not applied to the inverter circuits.
the control circuits.
continuity tester or buzzer to check.
Power supply
Continuity tester
Motor
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-L
Insulation Test with
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Continuity tester
Grounding terminal
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103
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