LENNOX PACKAGE UNIT HIGH HEAD PRESSURE 

Superior Comfort Heating & Air LLC had a Trane heat pump last week that the txv did that. I also like his wife videos.

Great video 👍 Just had a similar thing happen to me on a Lennox Energence 20 Ton RTU due to low airflow (dampers closed) -it was very weird- it had low suction pressure, fairly low superheat, the subcooling would start out normal and then climb to 45-50 degrees and the head pressure would climb quickly at that point until it tripped out on high head. After the first strike, the second and third strikes would only take 2-3 seconds to go from 300psi to cut out(675psi I think...). I suspect the low load on the evap due to low air flow (even with 89 deg return air😲) was allowing for normal superheat with very little refrigerant flow through the coil and started to stack the refrigerant up into the microchannel condenser.....causing the subcooling to climb until critical mass was acheived. It behaved the same for all four circuits. As soon as we located the closed supply dampers and opened them everything ironed out and ran fine. Very frustrating 😠. Thank you for all of your thorough videos-keep up the good work 👍.

I know it sucks but with package units, really good diagnostic is to recover and weigh in.. With that said I would have quadrupled checked my tools especially my vapor temp. I was wondering about the airflow this whole video... This guy puts out awesome videos I share with my guys all the time for training, absolutely love when we can have discussions about this stuff👍.

I will be going live on RU-vid this evening 8/19/19 @5:pm (pacific time) to discuss my most recent uploads and answer questions from RU-vid comments, the chat, and emails. Come check it out if you can ru-vid.com/video/%D0%B2%D0%B8%D0%B4%D0%B5%D0%BE-cFVJGl-KVEc.html

not to mention weak capacitors can cause improper rpm, but that's often reflected in current reading

Sean Mack I was thinking the same thing?

hey bud , you should try to work here in quebec. winter like 8 month i hate it so much. would love to work where he work with no humidity

Once I was soldering caps on some vacated kitchen plumbing pipes, in a bank. Tripped a smoke detector even without causing any smoke. The bank manager didn't know how to shut off the alarm n a fire truck showed up. Lessons learned by this kind of stuff are not easily forgotten.

@@jpp9876 i did the same thing in a hospital , welding in a condensing unit. i Met Everybody that day ! Fireman, Police, Building maint guys, and on.

@@jpp9876 lol

@@OcRefrig major whoopsy :))

@@throttlebottle5906 laws of physics are pretty reliable. Our lack of understanding them all can get us in trouble.

Great tip

I have been dealing with micro channel for the last 12 years never thought about using a leaf blower as an option, great idea Lucas👍

i use a co2 tank to blow out the coils. a leaf blower is lighter. thanks for that !

@@OcRefrig did I not mention cordless blower to help cleaning in the past? maybe it wasn't on your videos, I ricochet all over the place lol if it's really stopped up, compressor or tank is still better, more velocity and pressure in a smaller area.

I carry my blower with me everywhere I go.

good idea. i run my iphone at 1080 60fps too. much clearer video's too.

I agree

That is awesome!!! Good eye. I could have watched this vid 100 times and would have missed it every time. That obviously was misspelled on a ton of units before they caught it and revised the diagram.

@@hvacguru-Kansas Made in China

Do you have a restriction tho?

I have personally seen motors kick on with bad caps, run correctly, and then after a few minutes/hours hit internal OL or even start running backwards. Most of the time when I have a bad motor the cap will discharge when I short the terminals. A cap with improper mFd for the motor will cause more heat and a shorter life.

The motors will overheat quite often when the capacitor is weak. This will cause the motor to trip the thermal protection which resets after a few minutes.

If it weren't for empty airports, CNN would have 0 viewers.

Greg M use an infrared on the breaker see if it’s getting hot. The breaker could be the problem. Also at the disconnect. A loose connection will cause extra heat and trip it as well.

Yeah same here.. although I do want a Vito pack. They are nicer and better balanced.

If they are not adjustable TXV's remove the bulbs from the evaporator outlet lines and watch your head pressures go down and suction pressures go up. Add A/C renew, run for a couple days then put the bulbs back on the lines. If no change in pressures after removing bulbs then the bulbs must likely lost thier charge and replace the power heads on them (if that type of TXV). If not replace the txvs

This stupid site isn't letting me edit my comment... And I'm calling it right now, the cause of higher than normal head pressure was moisture or contamination, and it was more than likely from putting gauges on it every now and then. I still do not know the best way to hook up gauges without contaminating the system, as there will always be a little crossing when connecting.

@@DW-vl2wi Fieldpiece Wireless pressure probes or Testo ,other brands are available too. If you need to add refrigerant Schrader core removal tool or use a tee appion makes .

@@Gcanno Just checked those out. Put my man3 to shame. Damn.

@phillip perkins Many ACs want to know if the building is occupied or not, to know if it should run in an lower "economy mode" or "full mode". This is done by having *something* to tell the building occupancy status via an input called "OCP" on the AC, which should be shorted to +24v to tell the system that the building is occuped. Now to the smart idea. Many technicials install unneccessary occupancy sensors, when you actually, in most buildings, have a very good occupancy sensor - the burgular alarm system. Most alarm panels do have a ouput, called "ARMED", that is pulled high once the system is put in a armed state. Usually this output sends out a +12v (most alarm systems are +12v) signal when the alarm system is armed, which makes it a effective vacancy signal, that instead tells when the building is empty of humans. The smart idea is to wire this "ARMED" signal (since you would want to invert the vacancy signal to make it an occupancy signal) to an +12v relay, and then wire the relay's COM and NC outputs to the OCP and +24v signal on the AC. The net effect is that the OCP signal will then be high when the alarm is disarmed (either by a employee scanning his access badge in a access reader on the morning, or entering the code in the panel to disarm the system) and the OCP signal will then be low once the system is armed (either for example the last employee entering the code in the panel to turn it on, the last employee pressing B and then scanning is badge or similiar action, or by timer, that the alarm system is turned on like 16:00 every day automatically if not armed before). Another good source of an occupancy signal, if you don't have a building alarm system, is to put an microswitch inside the door jamb of the night lock and wire the microswitch's NC output to OCP,, or if the night lock is equipped with a microswotch position inside the lock body, so when the last employee leaves and locks the night lock, it will push the microswitch in and thus disable the OCP signal, tellig the system that the building is now empty.

Donald Dayton I use a miracle grow fertilizer on my hose. Drilled out the air port for more cleaner and it works great. I use Master Coil cleaner. Best stuff I’ve ever used. Order it through Johnson Supply.

Update: I-found the video I-was looking for

No the head pressure stayed the same