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Old 08-31-2017, 07:17 AM   #1
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Surge Guard 40250-RVC Problem

Has anyone replaced their Surge Guard 40250-RVC automatic transfer switch?
Ours failed yesterday and was continually cycling the AC power on and off. This fried two power strips inside the coach. I called TRC and the unit is not repairable. The new unit (40350-RVC) appears to speak a different protocol which means that the intelletec and silverleaf systems would no longer be able to manage the coaches energy usage. Has anyone found a work around for this problem?
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Old 08-31-2017, 01:51 PM   #2
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TRC Surge Guard products are all 'one and done.' If it doesn't fail in the first year, you're on your own. I'd suggest replacing the unit with a good auto transfer switch and then install a Progressive Industries EMS. They have a lifetime repair/replace warranty and are great folks to work with.

You might find a compatible ATS with your Silverleaf or Intellitec systems, or relocate the sensors that provide the information to them.
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Old 06-23-2018, 03:49 PM   #3
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I'm at the FMCA rally in Coos Bay OR. Silverleaf rep here says it's just a jumper/protocol change and then still works through the Silverleaf whole house system. I looked into it this morning since it looks like mine is failing too.
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Old 06-24-2018, 06:22 PM   #4
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Mr. D:

I was able to repair mine by backward engineering the schematic for the control board. I don't have the documentation with me but there were two input sensing circuits using a 1 watt 150 ohm resistor and a 1uF capacitor. It looked like one of the capacitors was mounted over one of the resistors and the capacitor got cooked by the heat from the resistor. I replaced the resistors with 5 watt-ers (three watts would have been sufficient) and the caps with 1 uF 450V metalized polypropylene film caps. So far so good. Removing and reinstalling the switch was a bit of a contortion due to its position in the middle of the bay.
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Old 06-24-2018, 10:26 PM   #5
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I've had a Parallax 501 going on 10 years. Seems to be very high quality. The new one is even heavier duty.

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