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UK diy (uk.d-i-y) For the discussion of all topics related to diy (do-it-yourself) in the UK. All levels of experience and proficency are welcome to join in to ask questions or offer solutions. |
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#1
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Fujisu air conditioner fan motor
I've recovered an indoor part of an air conditioner with the wish to turn it into a fan coil unit to heat a workshop. I have about 2 tonne of 80C water to dissipate from a wood burner. Manual at http://nagyker.columbus-klima.hu/wri...BAB_24LUAR.pdf and specifically page 12. As this is an inverter model I was half expecting the motor to be three phase but it now looks like it is a single phase ( 50Hz 42W 220V on motor) with a remote start capacitor, and 3 sets of windings. The three speeds look strange 540, 480 & 390 rpm. Also apart from blue, purple, red, white and black wires to the motor there are a second set of thinner black red and white wires pass to the back of the motor. I'm looking for insights as to whether I can run the fan without the control board, on any one of the speeds, any ideas? AJH |
#3
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Fujisu air conditioner fan motor
In message , Bob Minchin
writes wrote: I've recovered an indoor part of an air conditioner with the wish to turn it into a fan coil unit to heat a workshop. I have about 2 tonne of 80C water to dissipate from a wood burner. Manual at http://nagyker.columbus-klima.hu/wri...SM_AUY18LBAB_2 4LUAR.pdf and specifically page 12. As this is an inverter model I was half expecting the motor to be three phase but it now looks like it is a single phase ( 50Hz 42W 220V on motor) with a remote start capacitor, and 3 sets of windings. The three speeds look strange 540, 480 & 390 rpm. Also apart from blue, purple, red, white and black wires to the motor there are a second set of thinner black red and white wires pass to the back of the motor. I'm looking for insights as to whether I can run the fan without the control board, on any one of the speeds, any ideas? AJH If the capacitor is a start cap (usually low power motor just has a run capacitor), the the extra wires might be some sort of sensor to switch the start capacitor out? Or possibly thermistor overload protection? Don't know current types but 35 years ago:-) they had a cool resistance of around 1Kohm each. Unusual on single phase motors. Speed of induction motor on 50hz =(6000/no of poles) - slip Slip can get quite significant as the no of poles rise and the load will change with fan speed too. You might have 10, 12 and 14 poles based on those speeds? -- Tim Lamb |
#4
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Fujisu air conditioner fan motor
On Tuesday, 13 October 2015 21:17:47 UTC+1, wrote:
As this is an inverter model I was half expecting the motor to be three phase but it now looks like it is a single phase ( 50Hz 42W 220V on motor) with a remote start capacitor, and 3 sets of windings. The three speeds look strange 540, 480 & 390 rpm. Also apart from blue, purple, red, white and black wires to the motor there are a second set of thinner black red and white wires pass to the back of the motor. I'm looking for insights as to whether I can run the fan without the control board, on any one of the speeds, any ideas? Can you open it to see what's going on? NT |
#5
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Fujisu air conditioner fan motor
On Tuesday, 13 October 2015 21:17:47 UTC+1, wrote:
I've recovered an indoor part of an air conditioner with the wish to turn it into a fan coil unit to heat a workshop. I have about 2 tonne of 80C water to dissipate from a wood burner. Manual at http://nagyker.columbus-klima.hu/wri...BAB_24LUAR.pdf and specifically page 12. As this is an inverter model I was half expecting the motor to be three phase but it now looks like it is a single phase ( 50Hz 42W 220V on motor) with a remote start capacitor, and 3 sets of windings. The three speeds look strange 540, 480 & 390 rpm. Also apart from blue, purple, red, white and black wires to the motor there are a second set of thinner black red and white wires pass to the back of the motor. I'm looking for insights as to whether I can run the fan without the control board, on any one of the speeds, any ideas? AJH You could conduct a few experiments with the motor if you have an ammeter. ie Test out wires for continuity & make some random connections & see what happens keeping a check on the current, (ie it doesn't exceed stated max.) Problem is, at least two windings are need to start the motor. Sometimes one is disconnected after startup, sometimes not. Probably not in this case. The capacitor is a clue, it provides phase shift,(single phase motors are not self starting) so the winding connected in series with this will be the "start winding" and will be used regardless of speed setting. |
#6
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Fujisu air conditioner fan motor
On Wed, 14 Oct 2015 09:55:56 +0100, Bob Minchin
wrote: wrote: I've recovered an indoor part of an air conditioner with the wish to turn it into a fan coil unit to heat a workshop. I have about 2 tonne of 80C water to dissipate from a wood burner. Manual at http://nagyker.columbus-klima.hu/wri...BAB_24LUAR.pdf and specifically page 12. As this is an inverter model I was half expecting the motor to be three phase but it now looks like it is a single phase ( 50Hz 42W 220V on motor) with a remote start capacitor, and 3 sets of windings. The three speeds look strange 540, 480 & 390 rpm. Also apart from blue, purple, red, white and black wires to the motor there are a second set of thinner black red and white wires pass to the back of the motor. I'm looking for insights as to whether I can run the fan without the control board, on any one of the speeds, any ideas? AJH If the capacitor is a start cap (usually low power motor just has a run capacitor), the the extra wires might be some sort of sensor to switch the start capacitor out? As it's 42W my guess is it is a run capacitor but looking at the wiring the colours match the AUY24LUAR circuit which seems to have white as a common and then red purple and blue being switched speeds. The black is in series with the capacitor which is connected to the white so that would be the out of phase winding to kick it in the right direction. The thing is why have an inverter model without taking advantage of synthesising 3 phases for a true rotating field? When I get back to it I'll connect neutral to the white and live to the red and see if that works. Speed of induction motor on 50hz =(6000/no of poles) - slip Slip can get quite significant as the no of poles rise and the load will change with fan speed too. You might have 10, 12 and 14 poles based on those speeds? Doesn't make a lot of sense to have that many poles does it? AJH |
#7
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Fujisu air conditioner fan motor
On Thursday, 15 October 2015 21:42:34 UTC+1, wrote:
The thing is why have an inverter model without taking advantage of synthesising 3 phases for a true rotating field? cheaper |
#8
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Fujisu air conditioner fan motor
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