This is the schematic from the manual of the fan which i salvage this motor from. Sounds like you have a winding down to ground.
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How to test a 3 speed fan motor. How to check an electric motor if it is bad. The type of. There are 6 wires. Take your multimeter and set it to ohms. The electric motor is a bm 122 decomin brand 3 speed motor. The freezer light should turn off and the evaporator fan should kick on after a few seconds.
Identify the type of motor and examine its nameplate information. I have a bionaire brand table electric fan. Reverse the leads on the capacitor. Ball bearings in motors can wear out without lubrication. Test the first set of wires. Hope someone can enlighten me on the.
There are 4 wires connected to the motor coloured white yellow blue and black respectively. Count to three while the leads on the meter charge the capacitor. It has a 3 speed fan motor. Press and hold the switch for a minute. Do the following with the motor disconnected. Check for mechanical binding or seized.
Switch the volt meter to the ohm setting. If it turns on you should be able to clearly hear the electric motor activate and then a low hum from the fan spinning. With a multimeter set to low ohms usually 200 test between each winding terminal and the metal casing of the motor. Something was wrong with the solid state circuitry everything worked but the motor but a quick test of the motor indicated it does work. The motor uses. Yellow has a medium speed label and blue has a low speed label.
This fan has an oscillating grill with independent sync motor and timer circuit. Place the leads of the ohm meter on the wires that run from the capacitor to the motor. Small fan motors last a long time due to few moving parts. The motor has a 4mu 250volt capacitor. I have no knowledge about motors. If there is any reading on any of these then the motor is bad do not use it.
The white wire is called the run wire. If the fan motor does not turn on while you hold the switch the motor is probably bad. White wire has a high speed label. Now is the time to test the white brown and white wires.
Gallery of How To Test A 3 Speed Fan Motor
