At 9:08, it appears that the burned wire with the yellow insulated spade terminal was installed with the male tab of the ice cube relay wedged between the female terminal and the nylon insulation instead of being inserted into and captured in the female end. This loose connection would heat up over time. I really enjoy your videos, keep them coming!
Late night I used a file to clean up the contact points just to get them through. Remove the pitting and carbon til I was able to get a replacement. I would leave it but I think there is a thinner layer of a different metal on the tips of the contact heads that helps keep pitting down and lessen the likelyhood of welded contacts.
Great video! Nice visual and picking up on things,that as you mentioned.after awhile your eyes and mind work to look for obvious and in general items that are constantly getting voltage...also good catch on economizer stuck.. Basically a lack of maintence seems like...thermostat batteries..etc..im assuming no common wire? Great video, Curious hvac guy.. Appreciate your time and your videos... Bryan Tyler Refrigeration
I believe you are correct, no common wire on there- and of course no maintenance program in place because who does that right, lol-- thanks for watching Joseph
That relay for the condenser motors also drops out the crankcase heaters. When that relay burns like that you should check the heaters and wires to the heaters.
I was on a pm a while back the unit had a bad contactor that i changed out. about 2 weeks later it also went bad. the only thing i could find wrong was the transformer was tapped wrong .fixed transformer changed contactor no issues since. some units it makes a big differance how the transformer is tapped but i have seen others that have worked for years tapped wrong .may have something to do with how close the transformer is to the va limit.
That wire that is feeding through your smoke detector looks like class 2 wiring - the insulation on class 2 wiring is only good for 150 volts or 30 volts depending on how the transformer is protected. Also that class 2 wiring has to have some 2 inch separation when close to the power wiring ... it looks like whoever installed the system grabbed the primary of the transformer and ran it through the smoke detector instead of the secondary. I'd bet that if the smoke detector is ever tested and actually switches that 208 volts all the magic smoke will come out of it ... and if it fails bad enough it could put 208 into the fire system main brain box for a very expensive repair.... I'd do some checking on that situation and make sure - I'm pretty sure you dont want to wear that T shirt...
JT H- You sound like a guy whos seen a thing or two, in a good way of course-- Im gonna have to pick your brain one of these days. Thanks for the knowledge though, it is apprecaited
@@curioushvacguy6876 yep I'm old and have travelled many highways and seen lots of junk storms - the key is to learn from every job ... my brain is available for picking most any time - I'm in central time zone about 70 miles east of Dallas
Thanks JT H- any chance you'd wanna email your email address for future brain picking? I promise I won't try to sell you anything, lol--- if not it's all good curioushvacguy@gmail.com I've learned alot by simply humbling myself and asking older techs questions
I own the Flir TG167 works pretty good. I like that I can save pictures on it and transfer them if needed. Especially good for finding missing insulation in walls.... Can't remember what I paid for it was between $300-$400
I always carried the cube relays in my van. I always like to go OEM, just looks clean. But I used to have all the car max’s almost 100% lennox
At 9:08, it appears that the burned wire with the yellow insulated spade terminal was installed with the male tab of the ice cube relay wedged between the female terminal and the nylon insulation instead of being inserted into and captured in the female end. This loose connection would heat up over time. I really enjoy your videos, keep them coming!
Love the video man. Great work! Always enjoy watching how others troubleshoot and service units to make them right!!
That's the fun of the trade you never stop learning! Knowledge is Power!!!!
well any trade or skill but true
I love working on these rtu .good job boss
Late night I used a file to clean up the contact points just to get them through. Remove the pitting and carbon til I was able to get a replacement. I would leave it but I think there is a thinner layer of a different metal on the tips of the contact heads that helps keep pitting down and lessen the likelyhood of welded contacts.
I road with a guy for 2 years who 60 and he was great chillers learned bunch
Great video!
Nice visual and picking up on things,that as you mentioned.after awhile your eyes and mind work to look for obvious and in general items that are constantly getting voltage...also good catch on economizer stuck..
Basically a lack of maintence seems like...thermostat batteries..etc..im assuming no common wire?
Great video, Curious hvac guy..
Appreciate your time and your videos...
Bryan Tyler Refrigeration
I believe you are correct, no common wire on there- and of course no maintenance program in place because who does that right, lol-- thanks for watching Joseph
14:04 right next to I Block current is the operational max at 26A.
That relay for the condenser motors also drops out the crankcase heaters. When that relay burns like that you should check the heaters and wires to the heaters.
almost done with school your reading schematics diograms impressive.
Thanks for the videos
I was on a pm a while back the unit had a bad contactor that i changed out. about 2 weeks later it also went bad. the only thing i could find wrong was the transformer was tapped wrong .fixed transformer changed contactor no issues since. some units it makes a big differance how the transformer is tapped but i have seen others that have worked for years tapped wrong .may have something to do with how close the transformer is to the va limit.
got to love these late night calls
Excellent video step by step is the best one ! Cube relay is notoriously pitted all the time, same thing with frymaster. Enjoy your video 👍
Thanks! 👍
According to the OEM of the compressor, does it mean that #2 compressor was overamping?
Great work, love watching and learning. Is there any possible way you can do a schematic diagram explaining video?
Yes I can
I have never seen a continuous stream of condensate like that. But we're in the desert. Obviously a humid climate there.
A restaurant without a make-up air unit? How did the restaurant pass mechanical inspection?
your'e an excellent tech!!!!!!
Good job!! Those relays are known as "Form C" contact configurations. Common, NO and NC. ;)
Thanks for the info!
Whats the part number for those fan relays.?
That wire that is feeding through your smoke detector looks like class 2 wiring - the insulation on class 2 wiring is only good for 150 volts or 30 volts depending on how the transformer is protected. Also that class 2 wiring has to have some 2 inch separation when close to the power wiring ... it looks like whoever installed the system grabbed the primary of the transformer and ran it through the smoke detector instead of the secondary. I'd bet that if the smoke detector is ever tested and actually switches that 208 volts all the magic smoke will come out of it ... and if it fails bad enough it could put 208 into the fire system main brain box for a very expensive repair.... I'd do some checking on that situation and make sure - I'm pretty sure you dont want to wear that T shirt...
JT H- You sound like a guy whos seen a thing or two, in a good way of course-- Im gonna have to pick your brain one of these days. Thanks for the knowledge though, it is apprecaited
@@curioushvacguy6876 yep I'm old and have travelled many highways and seen lots of junk storms - the key is to learn from every job ... my brain is available for picking most any time - I'm in central time zone about 70 miles east of Dallas
Thanks JT H- any chance you'd wanna email your email address for future brain picking? I promise I won't try to sell you anything, lol--- if not it's all good curioushvacguy@gmail.com
I've learned alot by simply humbling myself and asking older techs questions
Nice walk though she cooling now.
With a thermal camera it’s easy to see loose, hot connections!
I own the Flir TG167 works pretty good. I like that I can save pictures on it and transfer them if needed. Especially good for finding missing insulation in walls.... Can't remember what I paid for it was between $300-$400
👍🏻👍🏻👍🏻
#38 Thumbs Up
I have fresh new info from school,If you need any thing new let me know.