rheem heat pump high pressure lockout
Steve. The 'Y' wire is wired in series with low and high pressure switches that may have tripped. I had a Tech over to discover a small leak which would loose charge after 30 days. Evidence of moisture present inside air mover. Though…. 95 satisfied customers. 6. We figured it was the coils freezing up and the fan running hard. We simply offer the finest heat pump solutions. Steve, Steve, Hi, thank you very much this forum there is a lot of useful info on here. This could be a TXV valve or metering device that is partially stopped up or not working correctly.7. I think these tiny coils restrict faster and you have to go slow with the charge like 1/4 pound then wait 20 min. I am sorry, but I am not familiar and do not know anything about micro-channel Nordyne units and how they can be charged. A dirty outdoor coil. I would like to suggest that you make sure that the capacitor on your indoor blower motor is in good condition and your indoor coil is good and clean. Hi! Check air distribution on coil. Hi Mr. Arnold – I have an old Tempstar 5500, Model CH5524VKA2 installed 1993. -Outdoor ambient is above 125 # F. Allow unit to cool and condensing pressure to reduce before restarting. he came out again last night and says that the compressor etc needs replacing and it is going to cost another $900.00 after last years $795.00 he charged to work on it and when he disconnected the high pressure switch, Hi Danna! I would run outside and hear the liquid line banging against the condenser which is the sound i would hear…the liquid lines would be moving pretty hard and fast and then the compressor would shut off. Heat pump units - In HEAT mode, a timed delay keeps indoor fan off for two minutes to prevent unheated air from being circulated by the indoor fan. Please see the video that we have on the following page: https://arnoldservice.com/problem-my-air-conditioners-contactor-will-not-engage-i-am-not-getting-24-volts-to-the-contactor-to-make-it-engage-what-could-be-the-problem/ It shows how to test the contactor coil to make sure it is getting voltage. I would recommend testing the capacitor first. Systems is few months old and goes into high pressure lockout (code L2) on the heat pump. I would recommend that you have a tech install gauges and find and fix your problem. We have a post about this problem on the following page: https://arnoldservice.com/problem-my-air-conditioners-contactor-will-not-engage-i-am-not-getting-24-volts-to-the-contactor-to-make-it-engage-what-could-be-the-problem/ You would need to keep checking for 24 volts between the Y and C wires. On the older pressure switches, they were brazed into the refrigeration lines and they are impossible to replace without reclaiming the refrigerate charge, brazing in a new high-pressure switch and liquid line filter drier, evacuating the system to get any air or moisture out then recharging the system. A restriction in your refrigeration cycle like a bad TXV (thermostatic expansion valve) or a stopped up orifice can also cause high-pressure problems. Dirty outdoor coil. thank you in advance for any help you can give – Dennis, Hi Dennis! Slow or dragging fan motor. I am sorry, I am not familiar with high-pressure switch operation on the newer heat pumps. After a while now the fan in the outside unit only partially works. If the fan motor is running slow then I would recommend checking to make sure that the fan motor capacitor is in good condition and up to specs. Hopefully, since you cleaned your unit the pressure switch fault will not occur again. Had the inspector seen it before we bought the house, we wouldn’t have made the purchase (with a list of other issues to add). The unit gets a lot of use in the summer, e.g. However, when there is a power outage you might find that the air conditioner does not start right away once the power comes back. Solid-state protection control or internal thermal sensors, Compressor timed off/on control or interlock, No voltage on line side of compressor contactor, Poor evacuation on installation or during service. NOT APPLICABLE TO BLEED PORT VALVES. There are types of faults and problems with detailed descriptions, possible causes and solutions which may be recommended in the certain situations. Fan speed ok, coils clean,filter non restrictive,ducts, no damage. Check to see if “R” is missing/not connected at motor. Other than those things I have no idea. If removing panel or filter reduces “puffing,” reduce restriction or reduce maximum airflow. Add filter drier, evacuate, and recharge. But it does not throw any codes when it’s running on cool and it cools well. For example, some of the issues that can be easily repaired by homeowners include:… Continue Reading Troubleshooting Problems With Your Heat Pump Most of the time the coil’s temperature sensors are held in place by a metal clip and the black gum insulation tape is used as an insulator. I hope that you can easily and inexpensively find and fix the problem. These units require you weigh in the exact charge amount. If the high-pressure switch continues to flash the high-pressure switch fault code then I would like to suggest that you or a service tech install gauges to see if the pressure is actually high or if the pressure switch is bad. Wait until delay is complete. Is the pressure actually high or is there a problem with high-pressure safety switch or defrost control board. - Verify input voltage is within 187VAC and 252VAC. Steve. I would try checking the capacitor and clean the coil first since they are the least expensive fixes. If your tech has not already made sure the refrigerant charge is right if you have a 410A unit make sure the subcooling is right. But it does not throw any codes when it’s running on cool and it cools well. In supply air stream, out of calibration, Poor system control using capillary tubes, Adjust air flow to 400 CFM [188.8 L/s]/Ton, Recover charge, install filter-drier, evacuate system, recharge, Remove restriction in liquid line Correct the refrigerant charge, Misapplication of internally equalized valve, Remove external equalizer line restriction, Loss of charge from power head sensing bulb, Charge migration from sensing bulb to power head (Warm power head with warm, wet cloth. So you might need a new compressor. Heat Pumo high pressure switch [ 1 Answers ] Heat will work fine through a cycle but after it completes cycle it goes off on the high pressure switch. Lots of helpful info. I would suggest that you try to reset the tripped switch, usually by pushing it in with your finger. Motor oscillates up and down while being tested off of blower. The unit should not have been running in a storm. We Have Promptly Shipped Over 350,000 Orders Since 2002! After the 3 or 4 time it finally throws a High Pressure Lockout again. Horizontal right installation with coil on the blower (upstream). It is a new installation and appears there is not enough cfm passing through this 3 ton unit ( by my calculations only about 900cfm) – Would or could that cause the high pressure situation? My question is…what is causing the liquid lines to vibrate so fast and hard to cause that knocking against the condenser? If the contactor on your unit has the contacts pulled in and both the compresssor and fan are not running then I would think that your compressor and fan are going off on thermal (over-heating) over-load which could be caused by a weak capacitor, low high voltage (make sure you have at least 220 volts high voltage) a restriction in your system (bad TXV valve, stopped up restrictor orifice, or unit has water in the system causing a restriction in your system when the water in the system freezes up over time). I gauged it up and it trips at 400 psi. While I’m there, I’m thinking to replace the coil’s temperature sensor which looks pretty easy. I have been told that compressors that have the internal mounting springs broken can make terrible noises too. The system is over-charged with refrigerant. present at the heat pump/defrost control. God bless you. Air should come out of the top of your unit. Pulled them, reran new, hooked it all back up and wallah! -Charge migration could have occurred resulting in high compression ratio. My question is about a 4 year old 3.5 ton fixed orifice Nordyne micro-channel AC only system. off – The desired programmed temperature point is less than 60 ° F (15 ° C).. LP and LP3 – Refrigerant gas shortage or faulty low The compressor is protected by a thermal over-load switch and when running high pressure this switch will open the circuit and stop the compressor. If you have a bad restriction in your system then the pressures might not equalize. Thanks for asking this question. I know it can be a pain trying to figure out what is wrong. The unit is 3 years old and is a nordyne unit. The 'Y' wire powers the contactor coil and should pull in the contactor. see the range We are Accredited Better Business Members with an A+ Rating! -Check the U/V/W output wires are correct. Many of these problems can be determined by installing gauges and looking at the pressures to see what is wrong. Working differently from traditional storage water heaters, gas continuous flow water heaters only This sounds like you have a restriction in your system. If the fan is cutting off and the compressor is running then I would think that you have a fan motor problem and you probably need a new fan motor to solve the problem. Tech said micro-channels are know for that and not a fan of the new technology. The wires that are coming from the thermostat to the contact, were chewed to all get out. On heat pumps the indoor coil becomes the condenser in the wintertime and if you are not getting enough airflow across the indoor coil it with cause the high-pressure code problem. -If ambient above 110*F or below 0 # F compression ratio could be too high for low speed operation. That’s what makes our innovative, super-efficient heat pumps a great choice for families seeking a versatile heating and cooling solution. ... 2003 Rheem Classic 1.5-ton heat pump startup/shutdown in HEAT mode - Duration: … If I get a new condenser what if their is a leak in the liquid lines? A/C or Heat Pump Compressor High Head Pressure Diagnostic Checklist 12 Causes of High Head Pressure at an Air Conditioner, Heat Pump or other Refrigeration System. There have been lots of problems with TXV valves so this could be the problem or you might have a fan motor that is running too slow. Can the AC continue to run w/out HPS being fixed? -Check charge level. I have a very similar problem on my outside Lennox AC unit. The next few months I struggled with this and brought in guys who all said I was low on refrigerant and changed compressor, contactor, txv valve…all with the same result. If you do not have 24 volts between Y and C then you either have a thermostat problem or a broken thermostat wire problem. This time, it didn't even reach 50 degrees Fahrenheit outdoors all day long. Steve. Both times, the button needed to be pushed in order to get the units to operate in A/C mode. Problem: My outdoor air conditioning unit’s high pressure switch trips ever so often. - Verify crimp terminals in the ICC to inverter communication cable are fully inserted and making good contact with the receptacle. Steve. The service tech was probably trying to prevent you from having trouble with your AC not working, by disconnecting the high-pressure switch. I hope you can easily find the problem and get it fixed soon. I check outside at the contactor and it is in the disengaged position (closed circuit). Goodman does have a good at least a 5-year warranty on parts. So sorry to hear that you are having problems with you outdoor AC unit. Reduce charge. The question would be…”Are the contacts pulled in on the contactor”? match single stage Heat Pump to variable speed blower? High head pressure can be caused by a dirty condensing unit, a slow condenser fan motor or a motor that stops, and over-charge of refrigerant or a restriction in the refrigeration cycle. Check low voltage connections (G.Y W. R. C) at motor. Steve, Hi Steve, We have a Lennox residential AC split system, about 6 years old. Surprised they hadn’t shorted out or burned anything up, or down. Hi Jerry. – Home Heat Problems With all power to the system off, would this not be indicative of a bad high pressure switch? did not having the pressure switch have anything to do with it? Whether you need furnace ignitors, AprilAire filters, EZ Flex filters, or another kind of HVAC merchandise, we want to serve you. Technicians can’t figure out what’s going on. The condenser fan would still run. Check selections on the thermostat. If your unit was kicking off the high-pressure switch this is a good sign that either the high-pressure switch is bad (which is unusual) or your unit is dirty, over-charged, has an obstruction if the refrigeration system or has a slow fan motor. We sell many different contactors on the following page: https://arnoldservice.com/product-category/air-conditioner-parts/ac-contactors-heat-pump-contactors/ Yes, this could very well be a low pressure (low refrigerant) switch that is cutting the unit off for protection. Twice in the last week I have encountered rheem heat pumps. Steve. I replaced the fuse and cleaned all the coils and it appeared to be running fine in ac mode and heat mode. Replace motor or capacitor. If the compressor is hot then this could be caused by a dirty condenser coil, a fan motor that is cutting out or running slow, (not up to speed) running low on refrigerant, a restriction in the refrigeration cycle or a faulty TXV valve. I hope you can easily find and fix the problem. The information given below can be helpful for you then. View Detail . cabinet, duct, or motor noise. • Charge per procedure attached to unit service panel. Do you have any recommendations on what the problem could be? - Check Thermistor continuity. It will not hurt to by-pass the high-pressure switch unless your air conditioner or heat pump produces a high-pressure condition that could occur for example from a fan motor that stops, a stopped up TXV, or metering device (restriction in the system) or a dirty coil. Thank you steve, My other thought was the compressor since this unit has been running for a years with no issues till no. Finally, on a Goodman GSC13 from 2011, would the HPS be serviceable without evacuating the system? lol. The RP14 meets the new 2015 energy guidelines and features a brand new modern design. It was located right outside the compressor’s discharge line. Hi Jerry! Check line voltage for variation or “saq.". • Check for correct voltage at compressor. He filled it to the factory specifications and the buzzing noise from the attic unit stopped. Below we list a dozen causes of high head pressure in an air conditioner or heat pump compressor motor. Then restore power to inverter then ICC. I have same question, different context. I like Trane and American Standard the best. Check lew voltage (thermostat) wires and connections. So sorry to hear that this happened to you! I was not home when they started and had them stop. Hi Steve, I am working in an industry on a HVAC system. We hope you can easily find and fix the problem. Any advice? Since the fan motor went out after the storm this is a sign that more than likely the fan motor was going bad, moving slow and was causing the high-pressure switch to go off. This would create high head pressure in your system. Managed by Wooassist - Woocommerce Support www.wooassist.com. Thanks so much for your kind words. I would suggest that you start testing with a volt meter between R and C you should have 24 to 28 volts. • Increase speed of blower or reduce restriction. Since your high-pressure switch is open then this could be caused by a bad high-pressure switch, an outdoor fan that does not work, a dirty condensing unit, or a restriction in your refrigerant system. If the contactor is loosing 24 volts to the contactor coil and the contacts are open and not pulled in then I would think that you have a low voltage problem that could be caused by the thermostat (make sure batteries on the thermostat are good) make sure thermostat is sending 24 volts between the “Y” and “C” “COM” wires, make sure that the high or low-pressure switches are not opening up an causing the low voltage to stop. This is not advised because this protects from hurting the unit. You make want to turn the power off to your unit for 30 seconds or so and see if the flashing code resets and goes away. I know its 248 “coming in” because there are three wires, white, black, and a gnd. Is it common for these micro channel units to take a while to become stable and be touchy about charging rate ? Thank you Steve for all you do and for all of the help!! Australia's favourite name in hot water since 1939. You would need to attach manifold gauges to see if you have a restriction, an actual high-pressure problem, or what the problem is. my condenser unit isn’t running. Hooking up gauges would tell you if the TXV (thermostatic expansion valve) is causing the problem. I hope you can easily find and fix the problem. This could be hard to get your service tech there when your unit is acting up since the problem is erratic. So he by passed the HPS and connected the wire somewhere else so it will send power and the AC unit turned on. Sorry that I can not be of much help. Replace TXV. They capped the York unit and its now sitting on the slab. So sorry, again that I can not give you an answer. & high pressure lockout@ Rheem A ranch house, 1480 sq ft heated area. Would need gauges to check this. Fantastic! Motor or fan blade going the wrong direction. Along with manufacturing many high-efficiency and standard air conditioners, they also make home heating systems, refrigeration products, and more. When you’re ready to install your Rheem heat pump, or if you just have a question on which one to choose, look no further than a trustworthy, independent Rheem Pro that’s likely just down the street. I’ve narrowed down my problem to a bad high pressure switch. Steve. rheem heat pump board indicates locked out due to low pressure ... Model UPNE-036JAZ SER 7348 M1506 05913 Code is flashing low pressure lockout. The following are the only reasons that I can think of that would cause a high-pressure alarm to sound: 1. 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