1st callback

[B_roche]

ok I just got a callback a few minutes ago. the job is about 2 hours away, it's an advance auto.

I was there today and found that the main breaker was tripping after about ten minutes of runtime. my probe was set on max hold and read 32.2 amps. the breaker was a 60.

the broker agency dispatched an electrician to replace the breaker.

advance just called saying that the electritian said the breaker is, in fact, not the problem. it is unsure weather or not he tried a new breaker.

the equip is monitered by a power monitering agency. I just called and they said the unit has been running for roughly 7 minutes and kicking off at around 20 amps.

I should mention that I checked the unit for faults to ground immidiatly after the breaker kicking and found none.

unless I can come up with something to look for I'm not going to go.

[maxster]

how was the re-start td for the compressor after it satisfied,either in the unit or thru the stat......that might trip on a quick restart after cycling off.breakers are useless if they trip and you go to start the load thru them.....they go right out.

[ultratec]

Time to put your megger on it. Single phase or three?

[Shophound]

the equip is monitered by a power monitering agency. I just called and they said the unit has been running for roughly 7 minutes and kicking off at around 20 amps.


Does this monitoring agency have the ability to control or cycle the equipment? If so, maybe their computer system or whatever form of control is short cycling the compressor.

Please post more info, such as make/model # of unit, tonnage, FLA or RLA, rated circuit ampacity of unit (all on nameplate if it's still legible or present), if system has unloading capabilities, etc.

[B_roche]

well it's not going out on any kind of re-start, it's going out during a steady run. my amp probe doesn't pick up any spike in amps before shutdown...granted it's digital but it is a hacr type fuse so I'd expect to see something.

man I wish I had a megger.

it's a single phase so I don't expect any voltage irregularity, reading 120 to each leg, 240 across.

I spoke with the manager and he's upset that the electrician did not bother changing the fuse, knowing it went out at 29 per the power moniter.

it's got me thinking though, knowing it's tripping w/ low amp draw, what did he do that makes him confident its not his equip.

[B_roche]

Originally posted by shophound

the equip is monitered by a power monitering agency. I just called and they said the unit has been running for roughly 7 minutes and kicking off at around 20 amps.


Does this monitoring agency have the ability to control or cycle the equipment? If so, maybe their computer system or whatever form of control is short cycling the compressor.

Please post more info, such as make/model # of unit, tonnage, FLA or RLA, rated circuit ampacity of unit (all on nameplate if it's still legible or present), if system has unloading capabilities, etc.

man I just noticed this. yeah they control the equip but I had a the unit in test mode.

it's a trane voyager, 5 ton. mca was something like 46.5.

both compresser and fan were running below their own rla's, heater's disconnected.

[seaboard]

Dammit Greenears, get yourself a cheap Supco megger. I think they're around $100 bucks. Put the metter down and visually inspect the wiring. Shake them around to see if something's rubbing. Check the disconnect for bad connections or a bad fuseholder. I've found that's one of the best uses for an infrared thermometer. Then call Mr. Beach at Comfort Systems and tell him you fixed it.

[B_roche]

well I've been upgrading tools to the extent that I'm sittin home on friday night....broke.

just got myself an hk35 fieldpiece w/ rh attachment and the megger is next week's new toy. I've needed it about ten times in the last few weeks but the amp clamp broke off of my last meter. I had to elec tape it together for this one.


Man I checked every wire I could find for any looseness.

actually, comfort systems doesn't want us getting into breaker boxes.

[Dad]

tisk...tisk...


take a breaker with you.... silly


don't take his word for it.

kick that voyager in the butt and let it run... you will find the breaker getting warm and jumping back.

do you need the voyager manual?

[B_roche]

of all these voyager units I service NONE of them have the manual. I think every tech that works on one jacks the first one they come across. they are an odd creature.

and the wiring diagrams......whew, tough to follow.

I had a 60 amp breaker with me too, but they told me to stay out of it.

[Dad]

I am on a different computer... send me an email and i will get you the manual.... got a model#? YCD?

Look... if you are going to earn that new truck... you may have to break a rule or two. Change the breaker yourself.

[stevehvac]

I agree dont take his word for it. How did he check the breaker? I havent met to many electricians that could troubleshoot well.

[B_roche]

yeah he never looked at the unit.

[indian]

Add an IR Thermometer to the warchest, then you can read temp of breakers. I've caught breakers beneath in panels causing problems as well as main busses going south. What brand of breaker panel is it?

[B_roche]

I think it's a murray. It'd have been nice to have an infered thermometer at the time. the breaker didn't feel hot but that doesn't really say anything.

[wolfdog]

If it the Trane Black Book you want, I still have it available on line.

I can post a link.

[jacob perkins]

that'd be cool

[beenthere]

Originally posted by wolfdog
If it the Trane Black Book you want, I still have it available on line.

I can post a link.


That would be GREATLY appreciated by many of us.

[valdelocc]

http://www.westernairsystems.com/downloads/

[Edited by valdelocc on 07-02-2005 at 01:50 PM]

[jacob perkins]

boo hoo hoo...that link wont open for me...boo hoo hoo

[beenthere]

Originally posted by jacob perkins
boo hoo hoo...that link wont open for me...boo hoo hoo

Doesn't work for me either.
Tried both ie, and mozilla.

[valdelocc]

sorry
http://www.westernairsystems.com/downloads/

[beenthere]

Thanks.

[indian]

Murry sounds more like a bicycle than a real panel.

[B_roche]

sparky went down and swapped the breaker today and it is back to full service.

[stevehvac]

Nice, Guess your call back record is still safe. Sparky's dont impress me much when it comes to troubleshooting.