Trane Voyager rooftop poopie

[WorkHardThenDie]

update.. need advice..
i cut open lines ... replaced filter dryer...
same problem ..
how can i be sire the coil is clogged.. i didnt seem to have any problem getting nitrogen thru..
so i think the compressor has the problem , but im not sur and all the windings ohm out within .1-.2..
but is hard to believe that clog is in so many of the take offs from the headers are bad enough to shut this thing down in a matter of seconds.
and trane is really pissing me off.. they wont send anyone down to check out a unit thats not even a year in its warrenty..
i dont want this to be all on me and my boss ..
has anyone ran into anything like this?

[Dallas Duster]

update.. need advice..
i cut open lines ... replaced filter dryer...
same problem ..
how can i be sire the coil is clogged.. i didnt seem to have any problem getting nitrogen thru..
so i think the compressor has the problem , but im not sur and all the windings ohm out within .1-.2..
but is hard to believe that clog is in so many of the take offs from the headers are bad enough to shut this thing down in a matter of seconds.
and trane is really pissing me off.. they wont send anyone down to check out a unit thats not even a year in its warrenty..
i dont want this to be all on me and my boss ..
has anyone ran into anything like this?

I kinda re-read through and you never really said what was going on, is the suction pressure dropping and going off in low pressure? Did you happen to put some pressure taps on the liquid line while you had it recovered?

[Six]

Nope I hav'nt.

The typical trane fixed orifice header restriction or Carrier fixed orifice heade restriction will usually run but start icing just after the orifices.

Did you blow through the drier? Was it stopped up ?

Trane wont send a guy warranty or not unless it their account and chances are he'll be as stuped as you.

That issue isnt isolated to Trane units only.

[timebuilder]

looking at manuel .place jumper t1 t2 2 contiuous seconds .allowing unit to energize ,the unit can now be scrolled through modes.when you remove jumper it will stay in that mode 1hr . if you need more info, . Email addresses are not permitted in post. ,I hope this helps used this lots of time . education through knowledge.

You do realize that this procedure has been in place for over a decade, right?

[WorkHardThenDie]

thanks for the quick replies..
NO thanks for calling me stupid.. im not.
the 2nd circut won't run long enough for me to see any icing..
thats why i thinks its just the compressor because that dead of a restriction is pretty far fetched.
i just don't wanna start cutting a brandnew rooftop apart..

im sorry for the jumbled explaination.. i was posting from my fone while my co-worker was driving.

what happens is- the suction drops , but not as fast as the head pressure goes up. i mean 10 seconds .. and the hp switch makes contactor bounce .. therefore breaker trips.
when i called building manager today .. he said the people in the office heard a bang the first time this happened.. the day i went there first and took the compressor out of the circut.
i couldn't get there untill today because i would have to shut the unit down and i didn't want to do it with people in the building because 1st stage works great.
i dont understand what you mean by pressure taps.. there are schraders in discharge-liquid- and suction.
but like i said , it doesn't run long enough to do that kind of test .. and im not jumping out the hp switch because it shoots up to 650 and it would be dangerous.
im sure it really is compressor ,but the cost to everyone involved is making my confidence balk.
i dont want to replace a compressor or coil and still be wrong.
im just looking for some input.. not someone to solve the problem for me.

[Dallas Duster]

Is the condenser a regular style condenser or a micro channel. Unless its a micro channel I just can't see the high pressure go up that fast sure it's possible I guess. Did you happene to weight out and in the charge for correct weight? Why would you think it's the compressor it's pumping up to 650 you say ? I've been putting in the TXV kits on some 1999 Tranes and there are no liquid line ports I've been installing some.

Just trying to shoot out some ideas.

[WorkHardThenDie]

charge was low.. but off by about 6oz..
its micro channel ..
the pressure switch is set for 650..
and i observed it doing so ..
what would micro channel have to do with anything?

[Dallas Duster]

charge was low.. but off by about 6oz..
its micro channel ..
the pressure switch is set for 650..
and i observed it doing so ..
what would micro channel have to do with anything?

Yep it would I would start with half of name plate charge . Then slowly work your way up but it could be over charged, especially if it won't run long.

[WorkHardThenDie]

could you explain that a little more please?

[Dallas Duster]

could you explain that a little more please?

Micro channel condensers don't offer any refrigerant storage capacity as a standard one does. Therefore the charge is critical .

[WorkHardThenDie]

so your saying namplate means nothing?
how would normal symptoms of overcharge not apply?
like i said .. LITERALLY 10 sec. or even less and the compressor goes off on high pressure .. and its seem to equalize quite quickly after power is disconnected. so a clog seems too far fetched and overcharge seems that way also ..

[Dallas Duster]

so your saying namplate means nothing?
how would normal symptoms of overcharge not apply?
like i said .. LITERALLY 10 sec. or even less and the compressor goes off on high pressure .. and its seem to equalize quite quickly after power is disconnected. so a clog seems too far fetched and overcharge seems that way also ..

Name plate is just an estimate you have a simply

[WorkHardThenDie]

uh.huh.. thanks.