Q : Trane Package Unit Test Mode

[jaych]

Hello My name is Jay
I'm a 21yr old working as an installer for a local hvac contractor
In process of moving into servicing.
I've been installing ducts, placing units, doing gas piping & etc for about 2 years right out of high school
I haven't done many parts of the jobs that require me to mess around with wires(tstat wire, pan switch and low voltage wiring is probably all i have ever messed with)
So my knowledge is not as its best.

Could someone please explain to me how Trane Test Mode works?
I saw some forums and installer's manual online but I can not understand
the process by reading those Because I do not know the basics.

If someone could explain thoroughly, and maybe even step by step,
it will be greatly...greatly...greatly.. appreciated !

thank you so much in advance,
Jay

[envisionservice]

I'm assuming your talking Voyager,Precedent or odyssey lines. You simply jump out test1 and test2 on the LTB. If you leave your jumper on it will step through each step every 30 seconds. You can also step it through makes it a little faster. If you remove the jumper it will stay in that mode for 60 seconds except in defrost mode. I highly recommend you get a tech with more experience before woking on these units. Good luck!

[envisionservice]

It will stay in the mode for 60 minutes if remove jumper not 60 seconds . My bad.

[boilerguy joed]

https://www.google.com/url?sa=t&rct=...11396085,d.dmo
Read jay read it's the only way to become a great tech. pg 37
note if you have a network card on the system you need to disable or test mode will not work

[jaych]

Thanks
but how do you know which mode you are in?
and what do you exactly get from it?
ones that i've see has test 1,2 24vac 1,2,3 and cpr-something 1,2,3, I think

P.S. - Oh i'm not servicing any units yet lol
just always been curious how that works

Again thank you !

[envisionservice]

Test1 and test2 not 1 and 2 on LTB that's 24v. Test 1 and 2 is 5vdc circuit. Each mode has a resistance value that's different I can't remember what it is it should be labeled in unit. And one way of knowing what mode your in is by what the unit is doing.

[Red Man]

The sticker on the electrical compartment cover panel lists the order of the test modes. It's useful because a lot of trane units aren't controlled by standard stats and you don't always have a R and W to jump to test the heat.

[smack]

The sequence is as follows:
Fan On
Economizer open
Cooling Stage 1
Cooling Stage 2 (if present)
Cooling stage 3 (if present)
Heat Stage 1
Heat Stage 2 (if present)

Last step would be exiting test mode. Cycling power will also do the same.

The LED on the RTRM board will begin to flash steady when in test mode with a single pule and will quite when out of test mode. The order of sequence stays the same the number of steps varies depending on how many cooling or heating stages you have. The number of stages above is example only.

All safeties are still in play on test mode, so if you know you have two stages of cooling and second stage does not come on, then there is an issue with the circuit.

On later models the OA sensor also came into play, so if it's cold outside you would need to warm it up if you are trying to bring on compressors for testing purposes.

[timebuilder]

First, you need to quickly meet the requirements for Pro membership, and get your application in. Then, we can give you more detailed help in the Pro area.

[badfeet]

smack had it right on. But I think that after fan on, on some units there is an exhaust mode as well.

[icy78]

Also dehumidify.