[hypoxia]

#3 Roof Air:  No Cool, Fan Runs

Checked capacitors & PTCR, inspected compressor electrical connections & ohm checked compressor.  White Run wire on compressor had been overheated, cut it & replaced the end.  Inside, removed ceiling cover & filter.  Found +12VDC yellow compressor start wire disconnected and hanging loose.  Connected it to the Y terminal of the 8330-426 control.  No compressor start.  Checked Y wire with A/C on and snowflake showing on Silverleaf display which indicates compressor ON & found zero volts.

Called Newell for location of Silverleaf TM-200 which is located above co-pilot side window.  The decorative panel is held on with two screws underneath & has straps attached to the wall for it to hang from.  Newell had me swap #3 cable on the TM-200 to #2 & using the #2 A/C controls it started #3 which verified the TM-200 as the failure.

There are Two TM-200’s, one for AC1, AC2 & AC3 and the other for AC4.  The TM- 200 used for AC4 has unused plugs for two other two positions.

Called Silverleaf, was advised to take a photo of the DIP switches on each of the two TM-200’s and swap the TM-200’s along with changing the DIP switch positions on each.  I did that which cured the problem, all 4 A/C units now work.

You may find a DIP switch covered with a yellowish covering.  That is just plastic which can be peeled off, I used a fingernail.

Rooftop AC Compressor Inop Silverleaf TM200 Failure and Repair.pdf Size: 1.83 MB  Downloads: 4

                           

[Richard]

Nice post !!!!!
Thanks.

[CaptainGizmo]

Wow...that was a great save! Wouldn't have thought to swap those and it took me a few reads and looks to figure it out.

So, just to verify what I'm reading...

The #3 circuit on the TM-200 #1 blew so...since the #2 unit only uses the "#1 position", you used it and put the the failed TM-200 where only the "#1 position" is needed?

Brilliant...and and unexpected backup!

Do we dare ask if you can even get those modules and at what price? (Hope it's not like Carefree's modules!)

Thanks!

[hypoxia]

Wow...that was a great save! Wouldn't have thought to swap those and it took me a few reads and looks to figure it out.

So, just to verify what I'm reading...

The #3 circuit on the TM-200 #1 blew so...since the #2 unit only uses the "#1 position", you used it and put the the failed TM-200 where only the "#1 position" is needed?

Brilliant...and and unexpected backup!

Do we dare ask if you can even get those modules and at what price?  (Hope it's not like Carefree's modules!)

Thanks!

Steve, yes, all correct.  The Silverleaf TM-200 is available $375 and I did order one.  I figure that I spend a lot of time where 4 A/C units are required so why not carry one more spare part.

One thing I need to do when at my shop is clean the rust off of the A/C rooftop units electrical connections, compressor especially as well as capacitors and also check the evaporator water pump motors.  They are the same motors used in bath fans, swamp cooler motors, etc..  I have lots of experience replacing them.  I have never had good success repairing them, must be something to do with the steel rod going through the brass bushing, I don't know.

[hypoxia]

Updated post #1 to improve the information and have it available on one post. Also included a .pdf repair description with photos

[hypoxia]

I changed the thread title to add to the diagnostics after discovering that the Heat and the A/C controllers are somehow tied together.  My flawed logic of using Trillium Electronics tech support prior to calling Newell was based on the idea that they designed and manufactured it & should be the best source.  That did not work out.

After the A/C problem was cured by moving the TM-200's A/C Controller, I had Trillium Electronics program and ship a new #1 TM-200 A/C controller which I installed, all 4 A/C units worked great.  

On our next journey I discovered that I had no heat in zones that Silverleaf controlled, bedroom & kitchen.  Discussed with Silverleaf (Trillium Electronics) & sent the TM-220 Heat Controller to Trillium for testing.  They determined the TM-220 CPU failed and sold me a new TM-220.  Installed it, no change, returned it for reprogramming, reinstalled it, no change, no heat.  I foolishly did not ask for the original TM-220 with the "bad" CPU to be returned to me.

Called Newell, their electricians determined it to be a TM-200 A/C controller problem, NOT a TM-220 Heat Controller problem.  I removed the new #1 TM-200 A/C Controller & reinstalled the original #1 TM-200 A/C Controller & everything worked, heat and A/C.

I then sent all 3 TM-200 A/C Controllers to Newell to have the new #1 TM-200 programmed the same as the original #1 TM-200 and have them all tested in a coach of my vintage.  I installed them and with the new #1 TM-200 installed the kitchen heat works but the bedroom does not.  All 4 A/C units work.  I reinstalled the original #1 TM-200 & everything works, heat & A/C, but not correctly.  Now when I wake up, the Living Room heat is set to 74°, the room temperature was 67° but the blower will not blow until I move the temperature setting one degree, up or down, doesn't matter which way.  One morning the bedroom temperature setting had reverted to 38°.

I discovered that the A/C roof units Evaporator Water Pumps have a stainless steel shaft which makes them easily cleaned and lubed.  They are good quality.

To be continued.....