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Old 07-08-2015, 11:26 PM   #15
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when operating properly, the fan on the PD 4655 hardly ever comes on. Maybe for a short time when it is in boost mode, but mostly it does not run.
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Old 07-10-2015, 08:07 PM   #16
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Thanks. Sounds like a winner for me. A project for the near future.

Lyle
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Old 07-10-2015, 08:24 PM   #17
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Well the fan did actually stop later that evening, I assume because it was cooler in the trailer. It ran for several hours which seems excessive.
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Old 07-10-2015, 08:31 PM   #18
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It's a CONVERTER!........which is responsible for battery charging and production of 12VDC when on shore power.

An inverter creates 120VAC from your batteries when off-grid.

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Thanks Steamy1. I love Amazon. But is the fan quiet enough to replace the inverter on my brand new AS? I suspect the new inverter is more efficient on the batteries and would be enough reason to replace it, but a quiet fan would be icing on the cake.

Hi bmark. The two fans with the voyage reducer added to the 12V lead gives much better airflow at much less power used than the old fan I replaced. The two together are much quieter than the one fan that came with my new AS. I got the idea from this AS thread:

http://www.airforums.com/forums/f425...errerid=100780
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Old 07-11-2015, 12:31 AM   #19
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Thanks for the clarification on converter vs. inverter. Lyle
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Old 07-11-2015, 11:05 AM   #20
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Originally Posted by lewster View Post
It's a CONVERTER!........which is responsible for battery charging and production of 12VDC when on shore power.

An inverter creates 120VAC from your batteries when off-grid.
yes; I was referencing the converter. I have not heard the fan run at all on the new unit. Previous unit ran continuously for ten days.
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Old 07-23-2015, 04:43 PM   #21
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Ok, I think I have determined why the converter fan was not stopping.

My fridge fan very rarely stops due to the low threshold temp on the thermo switch to start and stop it.

My current setup has two silenz fans, a 46 cfm and a 76 cfm running together. I started thinking the 12v draw from those might be causing the converter to run hot and thus the non-stop converter fan. As an experiment, I disconnected the 76 cfm fan and just let the 46 cfm run alone. Voila! after about 15 minutes the converter fan stopped and never came on again.
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Old 07-24-2015, 07:42 AM   #22
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I really doubt a muffin fan posed much of a load on the converter.... What do they draw, like maybe 1 watt?
Typically there is a thermistor on the board that senses internal case temp. Are you sure the insides aren't fouled with fuzz, hair or other gunk?
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Old 07-24-2015, 08:36 AM   #23
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I really doubt a muffin fan posed much of a load on the converter.... What do they draw, like maybe 1 watt?
Typically there is a thermistor on the board that senses internal case temp. Are you sure the insides aren't fouled with fuzz, hair or other gunk?
We have a dog, so that is possible. However, we have not been out that many times for it to be clogged. I vacuumed the louvers of the converter to be sure.

If the converter fan stops running constanly (which it did) I will only run the 46 cfm fan.
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Old 07-24-2015, 08:41 AM   #24
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Have you checked the voltage output with a DMV? If its much higher than 13 and change volts then its working hard.
Try a canned air product to blow out the guts!
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Old 07-26-2015, 06:06 PM   #25
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Have you checked the voltage output with a DMV? If its much higher than 13 and change volts then its working hard.
Try a canned air product to blow out the guts!
Should read DVM!
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Old 04-10-2016, 11:48 AM   #26
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Charger converter fan not stopping

Right, so today's issue is the same as the OP. My converter fan will not stop running.

Coach is a '16 27' FC FB.

Both batteries are full of water, connections clean and tight, and I read 12.5V across them at the battery box.

We are hooked up to good 50A power.

If I switch into USE at the BD switch, I get 12.3 at the coach battery read out. All is well. DC circuits are good (lights etc. )

If I switch to STORE in this condition, the red LED in the BD switch goes dim, lights go dim. Last night in this condition, I got 9.3V on the coach readout.

The fan in the converter ran all night. I can switch the converter 20A breaker #1 off, and it will stop. It resumes when the breaker is switched back.

This morning I checked all the 12VDC circuit screw lugs in the converter compartment were tight. I found one screw lug loose on the floor of the cabinet. It looks like it came from one of the spare lugs.

Any thoughts on troubleshooting this further? I'm a good way from an Airstream dealer, on the road in Fort Stockton TX.
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Old 04-10-2016, 12:24 PM   #27
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So, if I understand correctly, you're saying that when you're connected to shore power, if you select the "Store" position, your battery monitor says 9.3 V and your lights go dim?

This points to a problem with your converter. By selecting the "Store" position, you are disconnecting your battery from the trailer's 12 V bus. When connected to shore power, your converter should be supplying 13.8 V DC to power the bus. Perhaps you can measure the output of the converter directly and confirm that you're not seeing 13.8 V DC.
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Old 04-10-2016, 01:35 PM   #28
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So, if I understand correctly, you're saying that when you're connected to shore power, if you select the "Store" position, your battery monitor says 9.3 V and your lights go dim?

This points to a problem with your converter. By selecting the "Store" position, you are disconnecting your battery from the trailer's 12 V bus. When connected to shore power, your converter should be supplying 13.8 V DC to power the bus. Perhaps you can measure the output of the converter directly and confirm that you're not seeing 13.8 V DC.
Yep. Exactly. Which is also contrary to the manual, in that it says without a battery, even, I ought to see charging voltage on the 12V side from the inverter/converter. Which I thought was kinda odd to see 9V.

UPDATE: I switched breaker 1 off, and the fan stopped. While doing this, I snugged down all the lugs from #1 to #8 on the 12V rail. I also rewickered the wires a bit, gently coaxing them all into a better area below the buss.

When I switched the breaker on, the fan did not resume. I saw 13.3 on the readout, then, 10 minutes later, 13.5.

Hmmmmm....
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