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Testing Fan Motor and Board

DEP | MITSUBISHI ELECTRIC EUROPE | UK

Created on March 15, 2021

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Transcript

Testing the Fan motor

Testing the Fan motor

The Inverter driven fan motor is powered by the fan board and connects onto the fan board on connection CNINV The accessible fan plug connection can be found on the front of the Inverter box just below the 3 phase power supply labelled as RYFAN1 The link between RYFAN1 and CNINV is internal to the VRF outdoor unit

Testing the Fan motor

The fan motor winding resistance should read around 10 Ohms This value changes with temperature Based at 20 degrees

Insulation resistance test carried out at 500v Any value below 1Meg ohm would indicate a faulty fan motor