Resolved ITR OASIS Zone 2 Fault - Furnace

[Neal]

I woke up noticing the aft zone (zone 2) was a little cool and the furnace was constantly running. I have been using the heat pump the past few days so this was new and concerning. I figured maybe it was too cold out and the electric elements just weren't keeping up. As I got out of bed heading to the front I noticed a red light, the zone fault. Zone 1 furnace is fine, hot water is fine, zone 2 furnace triggers the fault.

Now having "logged" this issue for the gang, I'll dig into the troubleshooting manual now to see what I can determine.

ITR Oasis Service & Troubleshooting Manual

ITR Oasis Service & Troubleshooting Manual

rvforums.com

 

[Neal]

Red light on HEAT LOOP 2

 

[Texas Clodhopper]

Replace the pump. In the meantime, you can flip the switch on top of the silver box but turn it off anytime its not needed. The pumps are located on the backside of the Oasis unit. Crawl in form the passenger side on your belly, remove the partition/wall then remove the rear cover from the Oasis. There are some youtube videos on how to replace the pump - which ain't cheap.

 

[Neal]

I'm going to replace the 10A fuse first in the dist unit, that will likely blow again but it's the first triage step. Good tips on replacing the pump from the back side. I have a spare pump. Question is WHICH pump of the 3 is bad?

 

[Texas Clodhopper]

As I recall, its the one on the far left. You might try tapping on the pump with the screwdriver handle.

 

[Texas Clodhopper]

Tap the check valve, not the pump.

 

[Neal]

Fuse didn't look blown, replaced, no change (as expected).

Not critical as it's not a required item (Zone 2 furnace). Will look at replacing the pump probably at the next stop.

 

[Neal]

Loop 2 pump appears to be mid height in the unit, aft side.

 

[Neal]

I think I'll actually NOT replace this pump with my spare until I get home as I'll hold the spare in case another pump goes and I lose hot water, more critical. 3 weeks left on this journey.

 

[Texas Clodhopper]

I have 3 zones so 3 pumps.

 

[Neal]

I received two pumps from ITR after I wrote this when they got them in stock again. Today I finally got to the task of replacing it which was pretty straight forward but of course not fun especially as I added a shelf in that bay so I had to wedge my non petite self in there to do the work. Kind of hard to get the hoses off but in the end I did it.

Sadly, replacing the heat loop 2 pump (upper right from the pump side view) did not resolve the issue. I can hear the summer loop pump, I probably should replace it if I have to go back in there as it's the buzz I'm hearing inside the coach so I could probably clear that annoyance someday. Anyways, I still have a zone fault and heat loop 2 light.

• I pulled all fuses from the distribution panel - all check good
• I cycled 12V power on the coach and also the 2 x 120V lines to OASIS - no change
• I put a voltmeter on the leads going to the zone 2 pump and I'm not showing any voltage
• Disconnect reconnect the connectors (again) from the distribution panel
• Tried putting a new pump on the summer loop leads even while not connected to hoses, no change, nor do I think it ran as I probably needed to demand hot water
• Hot water works fine.
• Zone 1 furnace works fine.
• Both the master bedroom and master bathroom furnaces are running so no issues with something not running there that may cause a fault.

Any ideas as to what the problem may be? Who is going to be the RVF Problem Solver of the month for September???

 

[J&JD]

When you ordered the pumps from ITR did you discuss your zone problem with them? Sounds like a control board issue. However I’m certainly no expert as all I have done is replace the summer loop pump. Wish I could be more help.

 

[Neal]

That's my guess as well. Bummer to have pulled a good pump. Will call them Tuesday.

 

[Neal]

I'm happy to report this is now resolved. I called ITR HEAT (OASIS) today, and as always their customer service is outstanding. I know they must hate customers like me calling but they are always helpful and provide good direction. I explained the situation so he immediately said fuse but I pulled and inspected all. Then we talked zone board and I considered ordering one but I asked "what would you do" as I really just wanted to get a zone board on the way, he said he'd check the fuse and also test the fuse socket first. So I did, back 30 minutes to the RV storage to do the test so I could get back and get whatever I needed ordered before I depart on the 15th for the next trip. He said it was the top left fuse. I thought heat loop 2 was bottom left or second from bottom left. Regardless, I pulled them all but sure enough the top left fuse was blown. I replaced it and everything is now green! Shyeeeuh!

I think I got the bad fuse location from a google search and another post somewhere else. I looked at the manuals I have this morning (also in the Resource area of this site) to try to find the fuse layout. I can't find it. I looked on the ITR-HEAT.com web site, still not finding it. I may be skipping over it as this "Monday" (even if it's Tuesday) has been a hectic one. The manuals also say 5A fuse when in fact it's a 10A fuse so maybe the manuals are obsolete. I don't know.

If anyone has the correct fuse layout for reference of the next victim, please post it. By the way the zone board from ITR-HEAT is half the price from what's on Newmar's (newpar) site. No surprise there.

Anyways, this saga is finally closed for me. I may or may not dive in and change the summer loop pump as it is the noisy one but also I couldn't get the hose on the new zone 2 pump all the way (1/4 inch gap) which is on my mind so I probably need to get back into the box to rest my mind on that at least.

 

[TJ&LadyDi]

…I couldn't get the hose on the new zone 2 pump all the way (1/4 inch gap)…

When I put a new hose on just about any fitting, I use a light coating of lubricant on the fitting to help the initial push on go all the way onto the fitting. I use a food-grade lubricant on everything as it saves having to have more than one kind on hand. This is the one I use…

Basic Food Grade Equipment Lubricant, 4 Oz Tube: Amazon.com: Industrial & Scientific

Basic Food Grade Equipment Lubricant, 4 Oz Tube: Amazon.com: Industrial & Scientific

www.amazon.com

…but there are any number of suitable food-grade lubricants out there.

TJ

 

[RKins]

I'm happy to report this is now resolved. I called ITR HEAT (OASIS) today, and as always their customer service is outstanding. I know they must hate customers like me calling but they are always helpful and provide good direction. I explained the situation so he immediately said fuse but I pulled and inspected all. Then we talked zone board and I considered ordering one but I asked "what would you do" as I really just wanted to get a zone board on the way, he said he'd check the fuse and also test the fuse socket first. So I did, back 30 minutes to the RV storage to do the test so I could get back and get whatever I needed ordered before I depart on the 15th for the next trip. He said it was the top left fuse. I thought heat loop 2 was bottom left or second from bottom left. Regardless, I pulled them all but sure enough the top left fuse was blown. I replaced it and everything is now green! Shyeeeuh!

I think I got the bad fuse location from a google search and another post somewhere else. I looked at the manuals I have this morning (also in the Resource area of this site) to try to find the fuse layout. I can't find it. I looked on the ITR-HEAT.com web site, still not finding it. I may be skipping over it as this "Monday" (even if it's Tuesday) has been a hectic one. The manuals also say 5A fuse when in fact it's a 10A fuse so maybe the manuals are obsolete. I don't know.

If anyone has the correct fuse layout for reference of the next victim, please post it. By the way the zone board from ITR-HEAT is half the price from what's on Newmar's (newpar) site. No surprise there.

Anyways, this saga is finally closed for me. I may or may not dive in and change the summer loop pump as it is the noisy one but also I couldn't get the hose on the new zone 2 pump all the way (1/4 inch gap) which is on my mind so I probably need to get back into the box to rest my mind on that at least.

Glad you got it fixed. Hope you closed the loop with the guy you talked to.

 

[NWIP]

Posted a presentation by ITR for a Hoots rally. Page 10 identifies fuses.

 

[Neal]

ITR Hoots Oasis Presentation

NWIP submitted a new resource: ITR Hoots Oasis Presentation - Oasis Hoots Oasis presentation which has some good info including fuse locations on page 10. Read more about this resource...

rvforums.com

Thanks for sharing. Hard to read but if you zoom in you can see the labels on the zone panel. FYI they changed the bottom left fuses from 5A to 10A.