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The Onan Exhaust Fan is not working.
What do I need to test?
Happy at Great Barrier Island, NZ
Fair Winds
Arthur Suindqvist
SM435 Vista
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It is supposed to turn on when the generator starts. Check 2 things.
The on-line fuse The capacitor
On Fri, Feb 3, 2023, 19:31 Arthur Sundqvist < arthur@...> wrote: The Onan Exhaust Fan is not working.
What do I need to test?
Happy at Great Barrier Island, NZ
Fair Winds
Arthur Suindqvist
SM435 Vista
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I'll bet a beer it's the capacitor! If you don't have access to a test meter that does capacitance, start the generator, and give the exposed fan blades a push. If they speed up and keep running, it's the capacitor. This is a work around until you can get one shipped in. Faced with this problem on a recent delivery we hand-started the fan every time we started the generator. Running the generator without the fan running will heat your engine room up very hot which is stressful for the electrical equipment. The capacitors are cheap, if you need one, buy 2--or 3. If you can't easily test for a bad cap, just replace it. We have a box full of capacitors on Harmonie. I THINK we have a replacement for all of the important ones on the boat. Bill Kinney SM160, HarmoniePalmas del Mar, Puerto Rico http://www.cruisingconsulting.com
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Thanks for the input Regards Arthur Skickat från min iPhone
5 feb. 2023 kl. 04:08 skrev Bill Kinney <cruisingconsulting@...>:
I'll bet a beer it's the capacitor! If you don't have access to a test meter that does capacitance, start the generator, and give the exposed fan blades a push. If they speed up and keep running, it's the capacitor. This is a work around until you can get one shipped in. Faced with this problem on a recent delivery we hand-started the fan every time we started the generator. Running the generator without the fan running will heat your engine room up very hot which is stressful for the electrical equipment. The capacitors are cheap, if you need one, buy 2--or 3. If you can't easily test for a bad cap, just replace it. We have a box full of capacitors on Harmonie. I THINK we have a replacement for all of the important ones on the boat. Bill Kinney SM160, HarmoniePalmas del Mar, Puerto Rico http://www.cruisingconsulting.com
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Arthur,
Most owners do not know that Amel used a Climma Air Conditioner Blower for the extraction fan above the Onan. It has a glass-type inline automotive fuse and a capacitor used for speed control. It is a single 2uf capacitor that may be used as a start/run capacitor, but I believe it is used for speed control exactly like speed is controlled on the Climma AC.
Sometimes capacitors have obvious failures, other times, the failure is internal. The best way to check a capacitor is when it is disconnected from the circuit and using a multimeter with a capacitance range. Sometimes it is just easier to replace it and hope that you have solved the problem.
 | | CW Bill Rouse Amel Owners Yacht School | | | 720 Winnie, Galveston Island, Texas 77550 | |
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On Sat, Feb 4, 2023 at 9:57 AM Arthur Sundqvist < arthur@...> wrote: Thanks for the input Regards Arthur Skickat från min iPhone I'll bet a beer it's the capacitor! If you don't have access to a test meter that does capacitance, start the generator, and give the exposed fan blades a push. If they speed up and keep running, it's the capacitor. This is a work around until you can get one shipped in. Faced with this problem on a recent delivery we hand-started the fan every time we started the generator. Running the generator without the fan running will heat your engine room up very hot which is stressful for the electrical equipment. The capacitors are cheap, if you need one, buy 2--or 3. If you can't easily test for a bad cap, just replace it. We have a box full of capacitors on Harmonie. I THINK we have a replacement for all of the important ones on the boat. Bill Kinney SM160, HarmoniePalmas del Mar, Puerto Rico http://www.cruisingconsulting.com
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Bill, No I did not know this. Thanks for the info. As still att GreatBarrier I start the fan manually. It works for now. Regards
6 feb. 2023 kl. 05:02 skrev CW Bill Rouse <brouse@...>:
Arthur,
Most owners do not know that Amel used a Climma Air Conditioner Blower for the extraction fan above the Onan. It has a glass-type inline automotive fuse and a capacitor used for speed control. It is a single 2uf capacitor that may be used as a start/run capacitor, but I believe it is used for speed control exactly like speed is controlled on the Climma AC.
<image.png>
<image.png>
Sometimes capacitors have obvious failures, other times, the failure is internal. The best way to check a capacitor is when it is disconnected from the circuit and using a multimeter with a capacitance range. Sometimes it is just easier to replace it and hope that you have solved the problem.
<image.png> | | CW Bill Rouse Amel Owners Yacht School | | | 720 Winnie, Galveston Island, Texas 77550 | |
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On Sat, Feb 4, 2023 at 9:57 AM Arthur Sundqvist < arthur@...> wrote: Thanks for the input Regards Arthur Skickat från min iPhone I'll bet a beer it's the capacitor! If you don't have access to a test meter that does capacitance, start the generator, and give the exposed fan blades a push. If they speed up and keep running, it's the capacitor. This is a work around until you can get one shipped in. Faced with this problem on a recent delivery we hand-started the fan every time we started the generator. Running the generator without the fan running will heat your engine room up very hot which is stressful for the electrical equipment. The capacitors are cheap, if you need one, buy 2--or 3. If you can't easily test for a bad cap, just replace it. We have a box full of capacitors on Harmonie. I THINK we have a replacement for all of the important ones on the boat. Bill Kinney SM160, HarmoniePalmas del Mar, Puerto Rico http://www.cruisingconsulting.com
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If you start it manually it is operating as a run capacitor or a run/start capacitor.
Replace it when you have a chance | | CW Bill Rouse Amel Owners Yacht School | | | 720 Winnie, Galveston Island, Texas 77550 | |
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On Sun, Feb 5, 2023 at 3:05 PM Arthur Sundqvist < arthur@...> wrote: Bill, No I did not know this. Thanks for the info. As still att GreatBarrier I start the fan manually. It works for now. Regards Arthur 6 feb. 2023 kl. 05:02 skrev CW Bill Rouse < brouse@...>:
Arthur,
Most owners do not know that Amel used a Climma Air Conditioner Blower for the extraction fan above the Onan. It has a glass-type inline automotive fuse and a capacitor used for speed control. It is a single 2uf capacitor that may be used as a start/run capacitor, but I believe it is used for speed control exactly like speed is controlled on the Climma AC.
<image.png>
<image.png>
Sometimes capacitors have obvious failures, other times, the failure is internal. The best way to check a capacitor is when it is disconnected from the circuit and using a multimeter with a capacitance range. Sometimes it is just easier to replace it and hope that you have solved the problem.
<image.png> | | CW Bill Rouse Amel Owners Yacht School | | | 720 Winnie, Galveston Island, Texas 77550 | |
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On Sat, Feb 4, 2023 at 9:57 AM Arthur Sundqvist < arthur@...> wrote: Thanks for the input Regards Arthur Skickat från min iPhone I'll bet a beer it's the capacitor! If you don't have access to a test meter that does capacitance, start the generator, and give the exposed fan blades a push. If they speed up and keep running, it's the capacitor. This is a work around until you can get one shipped in. Faced with this problem on a recent delivery we hand-started the fan every time we started the generator. Running the generator without the fan running will heat your engine room up very hot which is stressful for the electrical equipment. The capacitors are cheap, if you need one, buy 2--or 3. If you can't easily test for a bad cap, just replace it. We have a box full of capacitors on Harmonie. I THINK we have a replacement for all of the important ones on the boat. Bill Kinney SM160, HarmoniePalmas del Mar, Puerto Rico http://www.cruisingconsulting.com
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Thank you for pointing out the 2mf Capacitor. I got a new one in Whangarei. there are a lot of cartech. firms. Now it works.
I have ordered som 2 an 4 mf as spare.
It was very easy to fix.
Kindest regards
and
Fair Winds
Arthur Sundqvist
SM435. VISTA
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