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Old 04-17-2017, 05:15 AM   #1
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Iota DSL-55 trouble shooting

Having an issue with blown fuse on an Iota DSL-55. Can't find a short and no problem with wrong battery connection. I have not been able to determine if the cooling fan is working. If not will heat build up cause the fuse(s) to blow?
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Old 04-17-2017, 10:50 AM   #2
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The only fuses shown for the DLS-55 is for reverse polarity protection. Are you sure you have those battery cables wired to the right terminals?

Just about everything inside the DLS 55 runs off the 120v input. The fuse is related to the battery hook-up, not power conversion or fan.
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Old 04-18-2017, 04:54 AM   #3
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Quote:
Originally Posted by Gary RVRoamer View Post
The only fuses shown for the DLS-55 is for reverse polarity protection. Are you sure you have those battery cables wired to the right terminals?

Just about everything inside the DLS 55 runs off the 120v input. The fuse is related to the battery hook-up, not power conversion or fan.
It is not bad battery connection and the fuse(s) do interrupt the out put. The problem is intermentant, and I have not been able to create a condition to cause the fuse(s) to blow. When it is working the 12v output is correct and the amp draw is not excessive. It just happens, even when in storage hooked up to shore power. I will be able to get to Iota tech support today and hope they can help with the trouble shoot. Thanks Richard
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Old 04-18-2017, 04:53 PM   #4
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When the fuse(s) blow, of course output is interrupted. Everything stops. My point is that its not an output verlaod or anything like that that blows the fuses.

Since it is intermittent, I'm wondering s something in the RV is causing a momentary reversal of polarity in the 12v system. The polarity fuses blow in a heartbeat if that happens.
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Old 04-19-2017, 04:52 AM   #5
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Quote:
Originally Posted by Gary RVRoamer View Post
When the fuse(s) blow, of course output is interrupted. Everything stops. My point is that its not an output verlaod or anything like that that blows the fuses.

Since it is intermittent, I'm wondering s something in the RV is causing a momentary reversal of polarity in the 12v system. The polarity fuses blow in a heartbeat if that happens.
In my discussion with an Iota tech he was stumped as well but suggested that I take the lid off and examine the fuse holders, is sending me a picture of the inside along with a wiring diagram for the circuit(s) to and from the fuse holders. This DSL is old manufacture date was April of 04. the tech suspects that vibration may have led to a condition that lets the holder short. I will look and post the results.
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