Pellet stove exhaust fan not spinning

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Old 11-29-17, 01:55 AM
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Pellet stove exhaust fan not spinning

Hi all,

I own a Palazetti pellet stove (Ecofire model) which reports an error message on start. This message is referring to an exhaust fan problem. The shaft is spinning without any problem.

I checked the voltage arriving at motor (230V OK) and at the encoder (+5V ok). So it might be the capacitor which is failing. I need to check it, but as a test, can I bypass it to just known whether the motor starts ? Or can I spin the motor manually enough and power up the stove the launch the motor ?

Thanks for your help.

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Last edited by PJmax; 11-29-17 at 06:55 PM.
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Old 11-29-17, 07:06 PM
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Welcome to the forums.

Going to need more if you want my help.
Did you post the correct product name or is it Piazzetta pellet stove ?
Either way..... no listing for an ecofire model.
Is there a model number ? Maybe a link to it ?
The diagram needs to be larger for me to see it.

The encoder is a three terminal device and connected with three wires. One wire is +5v. One wire is common or -. The third wire is a pulse. It should supply a pulse as the shaft is turned. You can read the speed pulses using an AC voltmeter set to a low scale. Connect the meter to common and the center or pulse line. If you see AC voltage AS the motor turns..... it's good.
 
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Old 11-30-17, 11:05 AM
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It started!

Hi PJmax,

Thanks for your answer. Actually, I had a spare capacitor with the same range (1F but for up to 2100V) which I put aside when I disassembled an out of order micro wave.

I swap it over and it restarted again as usual. I tested the old capacitor and it was only a fraction of a F, so not close to 1 F.

Thanks a lot for your help !
 
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Old 11-30-17, 04:35 PM
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Good job. Thanks for letting me know the outcome.
 
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Old 12-04-17, 02:30 AM
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Crossflow fan now spinning more rapidly, not as expected

Hi all,

Not I have another unexpected behavior: the crossflow fan (the one which flow the air through the stove in order to heat the room) is not spinning 30mn at high speed. Usually, it was like that a couple of seconds, and then was slowed down till an inappreciable speed, not hearable.

I can't imagine it's because I put a higher voltage capacitor (the one coming from a micro-wave oven), but maybe?

Any hint appreciated.
 
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Old 12-04-17, 08:04 PM
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As I explained... I can offer a whole lot of help as I can't see that board and I have no tech info on that unit.

A higher voltage cap, but at the same rating, is fine.
 
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Old 12-06-17, 09:01 AM
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Hi PJmax,

The exact modle is: "ECOFIRE SCRICCIOLA NEW 7 kW" here: HomePage - Palazzetti
I attached a bigger picture (page from documentation).

Engine number 3 on the diagram which is causing some trouble.

Thanks for your help.

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