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Old 09-27-2014, 10:19 PM   #1
Alpine Owners Club
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Inoperative HWH via Silverleaf in an Apex

Lost power to the HWH boards which made using the Silverleaf controls not function. Slides and smart beds still worked through switches in HWH compartment, but JACKS would had no power. At a rally in Branson a bunch of us started checking and we found the 15 amp mini fuse located in the battery compartment, labeled "House power" was blown.

Paul "Sully" Sullivan

40' MD Apex
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Old 09-28-2014, 05:39 AM   #2
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Join Date: Jan 2004
Location: Summer Rowlett TX (Why?)/Winter Palm Springs CA Two Springs RV Resort http://www.twospringsrv.com/
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I spent many hours deep in the Apex HWH Silverleaf wiring fixing problems and attempted to document what I found. I was not aware of the fuse in question hidden by WRV. On the attached wiring diagrams I have marked several wires with "Silverleaf??" and the fuse may be on the end of one of them. This diagram & the HWH 2000 series (Apex) owner's manual are not in the library.
Attached Files
File Type: pdf APEX HWH & Smart-Bed wiring diagrams (marked up).PDF (1.51 MB, 46 views)

Basil & Sue Shannon
Former Apex owner (Gary & Renee have it now)
Was Traveling Circus (2 clowns/Sage the Wonder Dog) Tent rotted. Circus folded.
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Old 09-28-2014, 08:51 AM   #3
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Location: Big Bear, Ca
Posts: 285
Hi Paul
I had the same problem last year in Alaska. The mini fuse is in a very odd place and it took me several days to find it. See my posts from last year.

Apex with No TM102 Data

I hope everything is working now.
Jim & Vivian
2007 Alpine Apex
40FT FDFS #75725
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Old 09-30-2014, 12:35 PM   #4
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Location: Vancouver, WA
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Hmmm, some thoughts on my coach and it's differences. Cannot verify "mini fuse" have not checked for it since just read this thread, will check.

I can operate my smartbeds using either auxiliary or main pump as they work either way. I only use switches in HWH and Services bay, since the hokey switches on the side of the coach have not worked in years. That may be the reason this works this way on my coach.

After the accident, and all the hassle of that, it was determined that a pin on the plug into the main Silverleaf computer on the dash was bent, and that caused the TM102 error we kept having. S/L fixed that for me, and not issues since.

To remind everyone the HWH Control Board needs around 100A-DC current for several milliseconds to start an operation, i.e., leveling, extending the jacks, putting out the slides, etc. The batteries cannot seem to provide that amount for that period. Always have shore power, the main diesel running (this would preclude leveling since the compressor wants to pump up the system) or the genset running to provide that power so you don't burn a diode on the motherboard from lack of that voltage and current requirements. At least this is what I remember from the discussion on this forum about 18 months ago. I follow that procedure and have no issues with the HWH system.
Thank you for the information and the drawings, have added it to my library of stuff I keep for the coach.
Monty & Janet - 2007 Alpine APEX 40 MDTS
S/N - 75715 - Retired - Master Certified RV Tech
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