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Stunned and amazed!


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3 replies to this topic

#1 jb8103

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Posted 15 November 2013 - 09:04 PM

By this video from the Samurai:

 

 

How in the hell does an AC motor run off a 9 volt battery?


First, do no harm.

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#2 DADoESTX

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Posted 15 November 2013 - 09:54 PM

They're not AC motors.  They run on DC, 12v or some such, IIRC, fed by the motherboard.  It pulses the current rapidly to vary the speed.



#3 jb8103

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Posted 16 November 2013 - 06:53 AM

Either that or 9VDC control voltage, bypassed at the Mutha. I realized that this morning after the Southern Comfort wore off. Still, an amazing video tech tip. The man is a gold mine.

 

Can we have a look-see at the schematics?


Edited by jb8103, 16 November 2013 - 06:55 AM.

First, do no harm.

#4 Samurai Appliance Repair Man

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Posted 16 November 2013 - 08:32 AM

These motors actually have a little control board inside of them.  That's why you can't use your ohm meter to test the windings like in a conventional motor.  It's also why if you reverse the power leads from the battery when you test the motor, you'll blow out that little board inside there. 

 

The schematics are on the minimanual and are virtually the same for all units using the WR55X10942 board (non-inverter compressors).  Although the inverter compressors use a different board, you can test the fan motors the same way.    






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