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Old 09-03-2017, 11:18 AM   #241
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Join Date: May 2009
Location: Columbus Ohio
Posts: 9,703
Year: 1991
Coachwork: Carpenter
Chassis: International S3800
Engine: DT360
Rated Cap: 7 Row Handicap
LOL that looks like my numbers since I got the ally 1000..

I wish I had your oil Pressure Gauge.. I like that full sweep model you have
not that it matters since I have a digital one.. but still..
-Christopher
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Old 09-03-2017, 08:05 PM   #242
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Location: St Petersburg, FL
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Year: 1997
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Chassis: TC2000 FE
Engine: Cummins 5.9
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So after lots of going around in circles and wiring up meters and light bulbs and jumpers, I think most of my AC woes are coming down to the condenser fans.

The one in the back, every time I would check it it would be off, but then I'd re-seat the wire for it on the relay and it'd come on. Of course I thought I fixed the problem every time, this happened more times than I'd like to admit. Yesterday, I replaced the relay, its staying on, and the read AC is more or less functional. It still has a fitting leak, but leaving my manifold gauge coupler attached is keeping that at bay until I can address it.

The front unit, the fan doesn't seem to run as well as the one in the rear. Audibly it sounds much quieter, which I assume means it isn't moving as much air as they are identical units and identically mounted. I'm able to use the front unit in cooler temperatures, or for short periods of time in higher temps.

Obviously, the best way to learn all this was to hit the highway in 100 degree heat and full sun at 5000+ft elevation, and start climbing even higher mountains so that everything was as hot as possible, so that's what I did.

I'm considering picking up a bunch of resistors and building an arduino project using a bunch of voltage sensors I can attach to various things and be able to tell if they're being powered or not.. And alert when something changes. I can monitor up to 8 on one of my Nano boards if I'm outputting serial to a Pi, or 6 if I'm doing i2c to something.

More likely I'll determine if the front fan is actually bad, replace it, and maybe have functional dual AC...
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Old 09-03-2017, 08:27 PM   #243
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Join Date: May 2009
Location: Columbus Ohio
Posts: 9,703
Year: 1991
Coachwork: Carpenter
Chassis: International S3800
Engine: DT360
Rated Cap: 7 Row Handicap
yes!!! you are getting there now!! and yeah condensor fans will ruin compressors ..so dont run the front unit at all.. even if it stays on. its still likely running way above normal pressure for what it should be.. esp if the pipe coming from the condensor up to the evaporator is hot. its only supposed to be warm at the worst..

also it may be quieter if the coild are dirty and clogged, or if its the wrong fan.... id tend to think its the right fan since the unit did cool good for a long time (or was it never used in the high heat since you had the bus)..

I use almost exclusively SPAL high performance fans.. just because a fan is the same diameter and fits the opening doesnt mean its the right fan.

fans that are going bad will run for awhile then trip the circuit breaker.. esp when you drive the bus since your RPMs, and likely battery voltage goes up a bit... reseating the wire is a good test. and may bde the only problem.. but dont rule out the fact the fan could be running at idle but kicks in and out due to the circuit breaker when moving.. (hugher voltage means higher current... breakers trip on current.. ).. the ones on the A/C self-reset..

your arduino / PI project... put temperature sensors on your air-conditioners.. knowing if the fans are running can help.. but ultimately what triggers an alarm is that the condensor gets too hot or the evaporator gets too cold.. too hot of condensors as you know will trip the high pressure switches and ultimately destroy clutches or compressors..

too cold of an evaporator..compoletely frozen. will end up allowing liquid freon to return to the compressor.. liquid is not compressable.. it will break the compressor..

measure the condensor in, condensor out, evaporator in (just PAST the TxV), and evaporator out. temperatures... I can tell almost exactly whats going on with an A/C unit by those 4 readings without ever putting a set of gauges on..

-Christopher
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Old 09-03-2017, 09:07 PM   #244
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I did spray the radiators really good with a hose the other day and it didn't look more than a bit Dusty. Maybe tomorrow I will have a look at the fans.

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Old 09-03-2017, 09:29 PM   #245
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Just cleaned the front glass but new bugs replaced the old bugs and my phone camera loves to focus on them....

Yesterday we got passed by a Wanderlodge with 2 Groms and a CT90 on the back. Up hill in the mountains doing 15 or 20 mph more than me. Bad ass bus!



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Old 09-04-2017, 10:02 AM   #246
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Oh look, more record high temperatures, lucky us!

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Old 09-04-2017, 10:49 AM   #247
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Join Date: May 2009
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Chassis: International S3800
Engine: DT360
Rated Cap: 7 Row Handicap
I thought you were gettng out of dodge..
-Christopher
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Old 09-04-2017, 10:54 AM   #248
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We left Dodge and are currently in Ford. Actually right now we are looking to be here for a couple days to get some Amazon supplies, abd figure out if Montana is too much on fire to visit or not...

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Old 09-04-2017, 10:59 AM   #249
Bus Geek
 
Join Date: May 2009
Location: Columbus Ohio
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Year: 1991
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Chassis: International S3800
Engine: DT360
Rated Cap: 7 Row Handicap
with the heat and winds I would stay away even if it doesnt look like youd be near the fires.. even being pretty far downwind of the smoke can make for a really nasty time driving..

-Christopher
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Old 09-04-2017, 11:03 AM   #250
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We have been surrounded by wild fires since we got to California. Oregon, Washington, and Idaho all have smoke. Not getting much media attention when Texas is underwater.

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