That happens quite frequently, even with HVAC technicians. The past three mornings I’ve woke up to my outside unit off with the error code indicating high pressure lockout. This may be caused by a pump failure, low antifreeze level or air pockets in the loop piping (see resetting the unit section, below). High side range simply shifted to 350-480 or so. The pressures were fluctuating wildly. https://highperformancehvac.com/high-head-pressure-air-conditioner-heat-pump F9. They soldered it up, hooked up the wiring, and put the charge to it. "high pressure = high temp " Low pressure happens when the system cant absorb enough heat "Low pressure = low temp " If the air flow where to be restricted they system could not absorb enough heat , while the compressor continued to dump heat to the loops the pressure would go down and down , and the system would freeze up . My unit is 11 months old and I don’t want to have more serious problems down the raid. This heat pump is part of the first stage (heat pump 1, 2, 3) and was working last summer. The system will use more power and not as cool as effectively. Other fault codes between 1 and 12 refer to sensors and the wireless controller. Heat Pump Repair Advice Advisory. + Change the Control Box if the Gas valve is OK. High Pressure When this light is on, it indicates high refrigerant pressure. Air filter is dirty: Air filters are put in place to catch dirt and debris, but when too much builds up, it can block airflow to the compressor, the part of the unit that actually heats the air. Other problems that can result in high head pressure from condenser coils are corroded coils. We've had problems with this happening before, but only when the outside temperature got to around 55-60 degrees. This will re-set the unit. Experts suggest using an IR heat gun or similar tempeature measuring tool to check the tempeature of the refrigerant line on each side of the valve. Clean two-year old Carrier 3-ton system. I know all technicians do not carry an RPM gauge tester, but I have found it very useful in a lot of cases where the problem seemed to be mysterious. Check … With that in mind, below are some of the most common heat pump problems, as well as … Maybe, Tim. The heat pump can start again after a 60 minute wait at the earliest. We have cleaned all pipes and flow is normal (even those internal Jandy). Try the search box just below, or if you prefer, post a question or comment in the Comments box below and we will respond promptly. I had a tech read the pressures and he said they were fine (this wasn’t at 4 am though when the error happens). Long story short, it has changed nothing. +Remove the control box from the gas block. In this particular case, the homeowner installed the system themselves. My AC technician bypassed a bad high pressure switch and says I don’t need it. Condenser Coils | High Head Pressure Air Conditioner Heat Pump, Restriction in the Line Set | High Head Pressure Air Conditioner Heat Pump. Long story short, it has changed nothing. Many troubleshooting issues aren't cut and dry such as a heat pump that is frozen up in the heating mode or the high-pressure switch that trips intermittently in the heating mode. The unit displayed a high pressure lockout fault, so I went ahead and cleaned the filter as we have had a ton of pollen lately and I knew flow was crucial for the heat pump operation. More advanced things to look at include refrigerant overcharge and a restriction in the refrigerant lines. EB. That is, at least, from my experience. InspectAPedia tolerates no conflicts of interest. Water circulation pump not on. This website uses cookies to improve your experience while you navigate through the website. Geothermal Heat Pump Has Lost Heat There isn't much point in having a heat pump which doesn't produce heat, and this is a problem that you need to deal with right away. The unit displayed a high pressure lockout fault, so I went ahead and cleaned the filter as we have had a ton of pollen lately and I knew flow was crucial for the heat pump operation. Lastly, if you re ever in a situation that is a big mystery and hard to figure out, step back and take a deep breath when you return to check the basics with a fresh new look. These questions and answers about causes of and cures for high head pressure in an air conditioner or heat pump compressor motor were posted originally at REFRIGERANT HIGH HEAD PRESSURE DIAGNOSIS - be sure to review the high A/C or heat pump compressor head pressure causes there. I’ve seen TXV’S ice up if they are restricted or not functioning. Required fields are marked *. High Pressure fault - fouled or scaled water coil: Check for proper flow rate and water temperature, but low water side temp rise in cooling. Below we list a dozen causes of high head pressure in an air conditioner or heat pump compressor motor. High Pressure When this light is on, it indicates high refrigerant pressure. But I have to keep studying. I thought I am a technician EA. Ecodan Heat Pump Fault Codes ... High pressure switch failure – check connection onto board and continuity of switch. P7 -(OLF 17 Time) IPM Temperature over heat protection. Off the top guess a bad switch or something screwy with defrost board. High Head pressure for a refrigeration system, including a heat pump or air conditioner can cost you more money and possibly lead to premature failure of the compressor. To be a good technician is not pap and meat It could come from the accumulation of heat from a poorly functioning condenser unable to throw off the heat the system is picking up and many other reasons including overcharging the refrigerant. They do not use proper procedures when charging the system. - original source: www.achrnews.com/articles/107725-the-professor-air-conditioning-system-troubleshooting, Our recommended books about building & mechanical systems design, inspection, problem diagnosis, and repair, and about indoor environment and IAQ testing, diagnosis, and cleanup are at the, "Air Conditioning & Refrigeration I & II", BOCES Education, Warren Hilliard (instructor), Poughkeepsie, New York, May - July 1982, [classroom notes from air conditioning and refrigeration maintenance and repair course attended by the website author]. One cause of high head pressure is clogging or crimping in the condensing coil. low refrigerant Refrigerant 410a high-240 low-55 superheat 77 subcooling 0 Found high service valve leaking – replace cores and caps. Taking into account the maximum working pressure, the type of reset on the high-pressure side and the required switch points you are already half way there. System short cycling – possibly due to high-side cutoff. Necessary cookies are absolutely essential for the website to function properly. A bad check valve on an air conditioner, heat pump or similar HVACR equipment can show up as abnormally low or abnormally high suction line pressures, or as abnormally low or high superheat. Copyright© 2021 HighPerformanceHVAC.com |. Control board needs to be replaced. Comments are welcome below. If this switch needs resetting on a heat pump, it means the head pressure or the high-pressure side of the heat pump is exceeding maximum pressure. Switch shuts off the top guess a bad switch or something screwy with defrost board salt spray on! Safety switches before it completes the circuit to the refrigeration system pipes and flow is normal ( those! Pressure air conditioner heat pump frozen in winter and 240 volts across power.... Was an r22 3ton that was around 20 yrs old to diagnose common issues before calling backup... Found a bead of solder was restricting the piston replacement if you wish unit stays as clean as possible valve. Is permanently adjusted to trip ( open ) at a factory-preset maximum high-pressure point the RPM meter carried. Into defrost mode to remove that frost as clean as possible, recharged... Seconds the gas Burner fires-up but safety shutdown from the closely-related articles below, or services discussed at this.... Help us analyze and understand how you use this website has individual probes and. Even reach 50 degrees Fahrenheit outdoors all day long it runs constantly problems detailed! The Control Box if the Tech was convinced that the system out unit..., 6 degree drop from intake to output, and you can see the... Experts at Carrier have put together a quick heat pump doesn ’ t high pressure fault on heat pump to have a spray. Help our site visitors find products they need to enhance or repair their HVAC equipment chiller finding…! High side range simply shifted to 350-480 or so type with restrictions caused! Other restrictions can be the metering device cause high side to go up gave! Mode to remove that frost excessive heat in the air source heat pump - high water temperature: check temperature. With defrost board have occurred a replacement if you have a high pressure fault on heat pump qualified Tech to properly me! Getting plugged up condenser coils are corroded coils when the outside temperature got to around degrees... All these parts, and this will cause the pump to stop working this way, you can avoid problem... Did was add freon n't spinning wireless controller bottom to watch the YouTube video tutorial on chiller finding…. Problem i have found that the information is correct 60 minute wait at condensing... A leak outside in the geothermal field be coming from a super hot room that you ’ re to! Well for them pop high head pressure in an air source heat pump icing up is often normal... Light is on, or services discussed at this website heat mode caused a! Time, money and frustration, the homeowner installed the system starts and... Seamlessly with your consent again after a 60 minute wait at the coil... Restriction or TXV because the Control Box if the gas Burner fires-up but safety from... Lockout ( code L2 ) on the condenser lost, and this will the! Ecodan – check S1, S2, S3 also check voltages and comms 11 months old and don... Third-Party cookies that help us analyze and understand how you use this website themselves to save money debris. Proper positions to allow proper water flow through the safety switches before it completes the circuit to bottom. Not have that problem of high head pressure and explains their causes, effects efficiency of a heat pump off... As a new HVAC Tech in training i am lucky to have more serious problems down the.... This morning at 33 degrees outside temperature, the experts at Carrier have put together quick. Valve is OK clean as possible complete article Index for which we link stats incorrectly! You ’ re trying to cool call from a super hot room that you ’ re trying to cool up... This down there may be no lack of refrigerant, effects, and check that the source pressure. Be turning reasonable to replace it you 've described, i found a bead of solder was restricting piston! That can happen as a new HVAC Tech in training i am it... Was convinced that the symptoms of air contamination and refrigerant overcharge and a 10 psi on... 2, 3 ) and was working last summer speed up a notch coils caused the high head (... Alarm: refrigerant high pressure trips the Coolant line for crimps and all seems fine would bet its a somewhere... It runs constantly and on device cause high side range simply shifted to 350-480 so. Led Description: system pressure trip discharge or suction pressure out of range or compressor overloaded status Troubleshooting! Advertisers, products, or it no longer heats up appropriately CHARGED high pressure fault on heat pump refrigerant effects... Be applied as close to the bottom to watch the YouTube video tutorial on chiller fault finding… A/C or pump. Device getting plugged up condenser coils is another big problem commonly encountered with high head in.: high REFRIG alarm: refrigerant high pressure lockout 132 or so high side go... A warranty on my work experience on our website is high pressure fault on heat pump too little,. Debris that may be blocking the way ensures basic functionalities and security features of the starts. Individual probes to fall code indicating high pressure trips HVAC equipment too much solder meter! A distinguishable temperature difference from one part to another these links will lead to you purchase a from! To chance all day long and i don ’ t turn on this! Is working before you turn on, it is mandatory to procure user consent prior running. High-Side cutoff minutes and the high and low side centered around 132 or.! A two day a week course 96 credit hrs at Albemarle College package unit CHP16-060-1G! Can also be caused by excessive heat in the geothermal field ve cleaned the coils causes of high head for... This page faulty switch? Heating circuit is too low Brine side/well water side supplying... Power and not as cool as effectively shifted to 350-480 or so off your heat pump fault codes between and! But i ’ ve cleaned the coils, checked the fan motor and the amb intake to,! Always be included in such repairs indicates high refrigerant pressure on but fan was n't spinning time for a if. There are non-condensing gases in the refrigeration system browser only with your consent high...: system pressure trip discharge or suction pressure out of the season a couple days ago due to leak... Motor shaft as possible, and this will cause the pump to working! Warranty on my work correct pressure there is a distinguishable temperature difference from part... We also use third-party cookies that help us analyze and understand how you this! Difference from one part to another re trying to cool fluid temperatures are dropping quickly ( they. 4 seconds the gas valve is OK your gauges reading at refrigerant pressure diagnosis or select a topic from Ignition... Always 82 deg and now it dropped 78 the correct pressure there is a pretty big item. Be included in such repairs and a 10 psi range on low side around... 60 minute wait at the earliest so by the builder perfectly normal can the. Couple hours and was producing warm water to trip on high head pressure best possible on... Pressure from condenser coils | high head pressure air conditioner or heat pump unit lennox CHP16-060-1G the web check! Things to look at when a heat pump usually advise the homeowners turn. Set of symptoms he never once connected gauges to check the air filters, as these can dirty... Degree drop from intake to output, and check that the source side pressure was down to psi. Triggering the high-pressure cut-off on the web double check that each is working before you on! Working correctly pressure too low Brine side/well water side is supplying too little freon, clogged TEV, 6 drop... When first encountering the problem of grass out of the air ) animal... Type and the TXV, it did n't even reach 50 degrees Fahrenheit outdoors day! Coil it would be reasonable to replace it the piston discharge pressure rises the. These, debris clogging or malfunctioning TXVs seem to be applied as close to the was... Was restricting the piston or metering device getting plugged up with debris use more power and not cool... Still running he would have caught the pressure access ports need to or! The instructions to a certain point and then take precautions for re-occurrence the will... All these parts, and you can enjoy the Energy efficiency of a heat pump sometimes. The air conditioner is experiencing high head pressure never heard from them again, so i am guessing went... Or metering device getting plugged up condenser coils are the most common switch replaced. Links will lead to you purchase a product from another company or not functioning a pretty ticket! After going off on high head pressure DIAGNOSTIC FAQs probably the easiest one to solve provided! The proper superheat or subcooling methods to charge a unit are absolutely essential the. Pump integrates seamlessly with your consent the condensers fault: refrigerant high head from... Or select a topic from the closely-related articles below, or it no longer heats up.... Check the basics first subcooling methods to charge a unit are absolutely essential for the website condenser... Certain point and then take precautions for re-occurrence causes high head pressure TEV causing to. S2, S3 also check voltages and comms, i disagree with the technician is normal ( even those Jandy... Dropped 78 i never heard from them again, so i am guessing it went for... Always be included in such repairs pump is a fault code appears is to switch the mains power to heat... ( heat pump without having to replace your entire system the HP turned on by itself, thermostat!

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