Mrcool P4 Error CodeMake sure both valves are all the way open. Diagnosing a Noisy Air Conditioner There is one big question you should ask about a noisy air conditioner: “Is the noise normal or the sign of a problem?” Depending on your air conditioner’s age, the noise might be normal. RESULT: Evaporator high temperature protection. Showing an error code p4 on my comfortair mini split no heat read more gotoman for ac Question about Kelvinator split A/C Model KSR25C. I tried replacing batteries and tried a new remote. NOTICE:MRCOOL®products must be installed in accordance with all applicable local, state and federal codes and regulations. P4 error code and poor technical support response from MrCool. Please read this manual carefully before installation and 4. At MRCOOL, we don’t expect you to have problems with your unit, but if you ever do see an error code, it’s good to at least have some idea of what is going on. P0 - IPM malfunction or IGBT over-strong current protection P1 - Over voltage or over low voltage protection P2 - High temperature protection of IPM module or compressor top P3 - Outdoor ambient temperature too low P4 - Inverter compressor drive error P5 - Indoor units mode conflict (multi-zone ONLY) P6 - Low pressure protection (Only for 36K). Disclaimer: Information in questions, answers, and other posts on this site ("Posts") comes from individual users, not JustAnswer; JustAnswer is not responsible for Posts. ComfortStar AC Error Code = HC Check indoor unit board. If you see an error code P4 or P5 flashing on the front of your head unit, the most likely reason is that your condensate line isn’t draining properly. Troubleshooting A P1 or P4 Error Code. This could cause a high head pressure resulting in that code. RESULT: Direct-current fan fault. This error code is could be caused by a faulty outdoor board. NOTICE: MRCOOL ® products must be installed in accordance with all applicable local, state and federal codes and regulations. Or, it can mean you need to release the refrigerant in your. MrCool is here to help. I followed some threads found in this subreddit which led me to taking the outdoor unit apart to test the capacitor on the. Showing an error code p4 on my comfortair mini split no heat but everything else seems to work. ago Any signs of water damage on the PCB? I've seen this error show up on units when traces on the pcb get corroded away from water drinkmoreapples • 3 mo. Cool’s fan is not working its code three I would like to order the part that is needed. These kinds of errors are more common when there is a lot of humidity. MrCool DIY mini split for the woodshop - Problems P4 error Bynum Woodworks 10K views 1 year ago Troubleshooting a P4 Error Code on a. P4 indicates current protection on Phase A of system A. Unplug the unit from the electrical outlet. Questions the Experts can answer 1. If not that then it's kinda hard to diagnos. ComfortStar AC Error Code = P5 Mode conflict. Many problems can occur with Mitsubishi mini-split heat pumps. ComfortStar AC Error Code = P7 Outdoor IGBT temperature sensor error. Please read this manual carefully before installation and 4. Lennox mini split systems are a great way to provide compact, yet effective temperature control for your home. A P4 error code will usually be related to your mini splits compressor system, housed within the outdoor unit. List of possible MRCOOL Error Codes: E0 - Indoor unit EEPROM parameter error E1 - Indoor / outdoor units communication error E2 - Zero-crossing signal detection error E3 - Indoor fan speed has been out of control E4 - Indoor room temperature sensor T1 open circuit or short circuit. After talking to Mrcool, I opened the top of the condenser and press the button SW1, it turned to CE and running 20 min. MrCool DIY mini split for the woodshop - Problems P4 error Bynum Woodworks 9. We have 36k Mr Cool condenser with 4 air handlers. Ingrams water and air told me that I could run the unit like that until I can get the other 9k hooked up. With a torch, the copper joints need to be unbrazed then brazed back up. A P1 or P4 error code might mean an abnormal rise or drop in the voltage of your MRCOOL system. RESULT: High-temperature protection of condenser. Causes are bad discharge temp sensor ,inaccurate charge and loose wiring. ALL electrical connections to a power source must be performed by a licensed electrician and comply with local, state and federal electrical codes and regulations. 9k views, 10 likes, 0 loves, 74 comments, 4 shares, facebook watch videos from mrcool: at mrcool, we don't expect you to have problems with your unit,. Check the power supply voltages Check voltage at outside terminals Check outside fan and ventilation Check the IPM Board Check outdoor Main PCB Check Compressor The refrigerant level should be checked as a P6 error code often indicates low refrigerant often caused by a leak. The P4 error in the owner's manual says it is an inverter compressor drive error. MrCool DIY mini split for the woodshop - Problems P4 error Bynum Woodworks 10K views 1 year ago Troubleshooting a P4 Error Code on a. Older units lack the insulation and noise-reducing technology many new units have as standard features. I have a 9k mini split 4 zone and it also has an 18k hooked up to it and will have another 9k hooked up to it whenever we replace the floor. What does P2 mean in AC? P2 or FL Error Code. Getting a P4 error, and the air inside is not cold. The indoor unit would work normally but the outdoor unit wouldn't run. I'm assuming I should test the IPM module next clwclw123 • 3 mo. Unless explicitly stated otherwise, installation must be completed by a licensed / certified HVAC technician. RESULT: There are two times E6 fault in 10 minutes (recovery will be after power off). MRCOOL AC Error Codes Error code meaning E1activation of high pressure switch Stirring of E3low pressure switch Discharge of high temperature. When you see a P1 or P4 error code, first turn the unit off. MRCOOL Phone Number: 270-366-0457 E1 Error Code Video: E3 Error Code Video: P1/P4 Error Code Video: List of possible. I tested with a multimeter with the omhs measurement and I'm not getting 1. Some AC technicians suggested users install a double booster voltage stabilizer to solve such problems. At MRCOOL, we don’t expect you to have problems with your unit, but if you ever do see an error code, it’s good to at least have some idea of what is going on. Questions the Experts can answer 1. kaplan usmle step 1 videos 2021. For example, a P6 code on a Cooper and Hunter mini split is an “Inverter Module (IPM) Protection Error”. The joints should be leak checked with nitrogen. Surface Studio vs iMac – Which Should You Pick? 5 Ways to Connect Wireless Headphones to TV. April 22, 2023 By MR COOL. The manual suggests this means “ IPM malfunction or IGBT over-strong current protection”. P4 error code and poor technical support response from MrCool. Showing an error code p4 on my comfortair mini split no heat but everything else seems to work. NOTICE:MRCOOL®products must be installed in accordance with all applicable local, state and federal codes and regulations. What does P4 mean on Mr Cool mini split? P4 error code is usually related to the mini splits compressor system. Cool mini split heat pump. MRCOOL AC Error Codes Error code meaning E1 activation of high pressure switch Stirring of E3 low pressure switch Discharge of high temperature. MrCool DIY mini split for the woodshop - Problems P4 error Bynum Woodworks 9. The refrigerant needs to be removed to replace the compressor. The condensate line is located inside your head unit and travels outside your home, usually through a hole in the wall behind the unit. I have called more than 10 times in 2 d …. who is the best lawyer in the world 2022. MRCOOL AC Error Codes Error code meaning E1activation of high pressure switch Stirring of E3low pressure switch Discharge of high temperature protection of E4air compressor F2malfunction of condenser temperature thermistor F3malfunction of outdoor ambient temperature thermistor F4Exhaust Exit Temporary Malfunction. The sensor Onnormal operation. / have someone replace the part. A P4 error code will usually be related to your mini splits compressor system, housed within the outdoor unit. Go Green with MRCOOL® For Earth Day. Lennox mini split systems are a great way to provide compact, yet powerful temperature control for your home. PC04 AC error fix - Sometimes there is nothing wrong with the AC, and the error code may appear just due to the voltage fluctuations. Stays like that till the sun comes up. If you're trying to say that MrCool systems are subpar there's better ways to express it tho. Let me know if it throws another P4 code. All air conditioning systems contain a list of error codes that appear on the control panel when the device is malfunctioning. If this doesn’t kick on the heat pump and you suspect a leak, call your HVAC contractor. PARTS NAMES The air conditioner consists of the indoor unit, the outdoor unit, the connecting pipe and the remote control. Or, it can mean you need to release the refrigerant in your MRCOOL unit. Make sure no lines were kinked or anything when you ran the limeset. Or, it may mean you need to release the refrigerant in your MRCOOL unit. I got a P4 error on the MRCOOL 24k DIY minisplit system. P5 indicates current protection on Phase A of system B. Leave the air conditioner off for several hours to see if it will reset. RESULT: No A Indoor unit coil outlet temp. A P1 or P4 error code might mean an abnormal rise or drop in the voltage of your MRCOOL system. The unit will not respond to the remote if I try to power on. Made sure the refrigerant lines were open? Yeah. ComfortStar AC Code = “dF” when defrosting. If the problem persists, go to the. Not a big fan of Mr cool. communication, mechanical fan, temperature, compressor, sensor | 641 views, 8 likes, 0 loves, 2 comments, 0 shares, Facebook Watch Videos from MRCOOL: At. Track your purchase & get help with missing, damaged, or incorrect orders. Symptoms of poor signal include: Inconsistent operation Unit working in some modes, but not others Outdoor unit powers up but indoor unit does not Indoor unit has power, but will not operate Damaged or destroyed boards or compressor Improper wiring can cause other system components to fail and require replacement. My MrCool 12K minisplit had a P4 error. I have a MrCool 115v mini split that's worked great for a year and a half. Press the "Power" button on the front panel of your air conditioner to power down your unit if it does not have a reset button. The pressure of the system is too low for the unit to operate. Surface Studio vs iMac – Which Should You Pick? 5 Ways to Connect Wireless Headphones to TV. be/k9uohbYDuRs see here for more details. Cool mini split heat pump. PC04 AC error fix - Sometimes there is nothing wrong with the AC, and the error code may appear just due to the voltage fluctuations. Turn off breaker wait 5 minutes, turn on breaker. The most likely culprit when the compressor drive is. A P4 error code is caused by an error in the compressor drive. Disclaimer: Information in questions, answers, and other posts on this site ("Posts") comes from individual users, not JustAnswer; JustAnswer is not responsible for Posts. I have a diy-hp-24 Mr cool and the control board on the indoor has no display. I'm having the same error code of P4 on a Mr. Page 57 Procedure Illustration 5) Disconnect the connector for fan motor from the electronic control board (see CJ_ODU_INV_004 ). The new outdoor unit has the same model number as the old one (A-12-HP-C-230B). #Inverter #compressor #drive_errorA P4 error code is caused by an error in the compressor drive. The most likely culprit when the compressor drive is malfunctioning is high temperatures. Outdoor unit will not run, indoor fan runs. MRCOOL Phone Number: 270-366-0457 E1 Error Code Video: E3 Error Code Video: P1/P4 Error Code Video: List of possible MRCOOL Error Codes: E0 – Indoor unit EEPROM parameter error E1 – Indoor / outdoor units communication error E2 – Zero-crossing signal detection error E3 – Indoor fan speed has been out of control E4 – Indoor room temperature sensor …. DA1221-H2-O: Procedure Illustration 1) Remove the nut securing the fan with a spanner (see CJ_ODU_ INV_001 ). I got a P4 error on the MRCOOL 24k DIY minisplit system. CODE: E5. I have the error P4 and P6. Failing to heat or cool, the fan not blowing air, electrical problems, blinking lights, and water leaks are just the tip of the iceberg in terms of possible issues. Not a big fan of Mr cool. If the heat pump’s drain pan is clogged, you should clean it immediately. Today it decided to throw an error code P4. A P1 or P4 error code might mean an abnormal rise or drop in the voltage of your MRCOOL system. Yes clogged may cause the problem. Customer Support. Plug your air conditioner back into the electrical outlet and turn it on. MrCool sent a replacement heat pump and lineset Tutorials DIY Mini Split Installation (MrCool Unit Used In Video Demo) 3rd. April 13, 2023 By MR COOL. Ingraham tech said it must be the warrantied control board. RESULT: Compressor discharge high-temperature protection. P4 error code and poor technical support response from MrCool. RESULT: Outdoor condenser high temperature protection. Mrcool Diy Mini Split For The Woodshop Problems P4 Error Mrcool Air Conditioner Error Codes Mrcool Air Conditioner Codes Mr Cool Diy Error Code P6 Bypass Fix Mr Cool Diy Not Cooling System Reset (multizone Mini Split Trouble Shoot) ! Otosection We bring you the best Tutorial with otosection automotive based Tags. When you see a P1 or P4 error code on your MRCOOL mini split, first turn the unit off. Unless explicitly stated otherwise, installation. RESULT: Discharge temperature protection. CODE: P1 PROBLEM: Over voltage or over low voltage protection CODE: P2 PROBLEM: High temperature protection of IPM module or compressor top CODE: P3 PROBLEM:. List of possible MRCOOL Error Codes: E0 - Indoor unit EEPROM parameter error E1 - Indoor / outdoor units communication error E2 - Zero-crossing signal detection error E3 - Indoor fan speed has been out of control E4 - Indoor room temperature sensor T1 open circuit or short circuit. Symptoms of poor signal include: Inconsistent operation Unit working in some modes, but not others Outdoor unit powers up but indoor unit does not Indoor unit has power, but will not operate Damaged or destroyed boards or compressor Improper wiring can cause other system components to fail and require replacement. After talking to Mrcool, I opened the top of the condenser and press the button SW1, it turned to CE and running 20 min. Can barely see the pipe that was installed August 12, 2020. What does P4 mean on Carrier air conditioner? CODE: P4. A P6 code on a mini split will vary between manufacturers and model numbers. sensor or connector of sensor is defective Midea air conditioner error codes. ComfortStar AC Error Code = P3 Outdoor low temperature protection. Or, it may mean you need to release the refrigerant in your MRCOOL unit. Then turn it back on after two minutes. I'm having the same error code of P4 on a Mr. You get free Lifetime tech support for every product you purchase at Ingrams. Today it decided to throw an error code P4. My MrCool 12K minisplit had a P4 error. It comes on when it gets warmer. A quick test to perform in this case is to set the unit to the maximum heating temperature, run it for 15 minutes, and check the larger pipe coming from the heat exchanger to see if it is hot enough. Some models are built for air conditioning only, while heat pump models can offer both heating and cooling. When you see a P1 or P4 error code on your MRCOOL mini split, first turn the unit off. A high temperature at the discharge line could also trigger a P4 code. Make sure no lines were kinked or anything when you ran the limeset. What Are Error Codes? - MRCOOL DIY Ductless Mini Split MRCOOL 10. MRCOOL® DIY® Quick Connect Pre-Charged Line Sets: Tested for Perfection. The reviews I've read seem quite flattering, and we're not even going to entertain the concept of central air in our 100+ year old rowhouse, nor the HVAC technician charge etc. I followed some threads found in this subreddit which led me to taking the outdoor unit apart to test the capacitor on the compressor. Here is what you need to know about the P1 and P4 Error Code. Will clogged fiters Ask an Expert Home Improvement Questions HVAC Questions gotoman for ac, HVAC Technician 5,490 Satisfied Customers 51 years of experience install design and repair of all makes and models of AC gotoman for ac is online now. Installed the MrCool DIY Ductless mini-split in my workshop only to have problems. 925 views, 5 likes, 0 loves, 6 comments, 3 shares, Facebook Watch Videos from MRCOOL: At MRCOOL, we don't expect bad things to happen, but when they do, 925 views, 5 likes, 0 loves, 6 comments, 3 shares, Facebook Watch Videos from MRCOOL: At MRCOOL, we don't expect bad things to happen, but when they do, it's good to know how to take care. MRCOOL AC Error Codes Error code meaning E1activation of high pressure switch Stirring of E3low pressure switch Discharge of high temperature protection of E4air compressor F2malfunction of condenser temperature thermistor F3malfunction of outdoor ambient temperature thermistor F4Exhaust Exit Temporary Malfunction. How to troubleshoot error code PC03 on 4th generation Mr Cool mini split? 2. You may also find the P6 code if the compressor is struggling with high or low pressure issues. MrCool DIY mini split for the woodshop - Problems P4 error Bynum Woodworks 10K views 1 year ago Troubleshooting a P4 Error Code on a. Or, it can mean you need to release the refrigerant in your MRCOOL unit. I'm having the same error code of P4 on a Mr. What Are Error Codes? MRCOOL E1 Error Code Explained: MRCOOL E3 Error Code Explained: MRCOOL P1-P4 Error Codes Explained: Troubleshooting A P1 or P4 Error Code: A P1. RESULT: Voltage protection fault. If this switch is open, the P6 code can appear. We got a P4 error on all 4 air handlers. 1 more reply More posts you may like r/ender3v2 Join • 1 yr. P6 – Compressor Switch Open or Drive Board Failure. RESULT: The cooling fin high temperature protection. A vacuum needs to be pulled and the refrigerant weighted back in. Showing an error code p4 on my comfortair mini split no heat but everything else seems to work. This error code is could be caused by a faulty outdoor board, a faulty outdoor fan motor or a compressor malfunction. A P4 error code will generally be related to your mini splits compressor system, housed within the outdoor unit. MrCool sent a replacement heat pump and lineset Tutorials DIY Mini Split Installation (MrCool Unit Used In Video Demo) 3rd. Condensor Hi Question about Kelvinator split A/C Model KSR25C. P4 is high discharge temperature. Clean your filters and shut off system to clear fault and retry. A P1 or P4 error code might mean an abnormal rise or drop in the voltage of your MRCOOL system. MRCOOL Phone Number: 270-366-0457 E1 Error Code Video: E3 Error Code Video: P1/P4 Error Code Video: List of possible MRCOOL Error Codes: E0 – Indoor unit EEPROM parameter error E1 – Indoor / outdoor units communication error E2 – Zero-crossing signal detection error E3 – Indoor fan speed has been out of control E4 – Indoor room temperature sensor …. I bought the exact same MrCool system. Just bought the unit new about. [updated 1/24/2018: Legal disclaimer added]In this Tech Tips video, Jeff explains the possible causes of P6 error code and how to resolve it. I have the error P4 and P6. When the compressor drive is not working, the most likely cause is excessively high temperatures. Russ here. Checking the air filter: If your heat pump’s performance is the problem, c heck the system’s air filter and its condition. Today it decided to throw an error code P4. 4 electrical supply lines to inside units are correctly installed (red [1], white [2], black [3], ground). This could cause a high head pressure resulting in that code. And you checked the service ports? How old is the unit. Then turn it back on after waiting two minutes. ComfortStar AC Error Code = P4 Inverter compressor drive error. If I push the force button on the unit the board displays temp and the fan comes on. The first thing to check is that proper voltage is going to the outdoor unit. At MRCOOL, we don't expect you to have problems with your unit, but if you ever do see an error code, it's good to at least have some idea of what is going o. If it’s dirty, replace it as a clogged filter can. A P1 or P4 error code might mean an abnormal rise or drop in the voltage of your MRCOOL system. It’s basically a mr cool unit that’s been rebranded, p4 is an inverter error, which could be caused by numerous things, you are going to need a multimeter to. I bought the exact same MrCool system. A P4 error code is caused by an error in the compressor drive. Make sure all of the connections are torqued to spec. ago Ender 3 v2 sudden print problem out of blue 1 3 r/335i Join • 1 yr. When the compressor drive is malfunctioning, the most likely culprit is excessively high temperatures. Not a big fan of Mr cool. Fan Motor CJ_ODU_INV_004 6) Remove the fixing screws of the fan motor (4 screws) (see CJ_ODU_INV_005 ). After talking to Mrcool, I opened the top of the condenser and press the button SW1, it turned to CE and running 20 min. The P2 or FL error code (depending on model) indicates that the drain pan in the unit is full. 2-1) Function indicators on indoor unit display panel Display panel. CODE: P4. RESULT: IPM modules protection. NOTICE:MRCOOL®products must be installed in accordance with all applicable local, state and federal codes and regulations. If you see an error code P4 or P5 flashing on the front of your head unit, the most likely reason is that your condensate line isn’t draining properly. there is 125 psi standing pressure; 230v from disconnect; Communication voltage, 1-2, 230v; 1-3, 140v, 2-3, 63v; 1-G, 120v; 2-G, 120v; 3-G, 41v. Mrcool Do It Yourself 36 000 Btu 3 Ton 16seer Ductless Mini Split Air. What does P4 mean on a carrier mini split? A P4 error code will usually be related to your mini splits compressor system, housed within the outdoor unit. My MrCool 12K minisplit had a P4 error. We believe that by providing facts, resources and options - customers and resellers will choose MRCOOL. P2 error could be triggered by a high temperature at the discharge line. It’s basically a mr cool unit that’s been rebranded, p4 is an inverter error, which could be caused by numerous things, you are going to need a multimeter to diagnose this. Let’s go over some of the best things you can do to protect your Mitsubishi mini-split and ensure it has a long and trouble-free life. ago I found this: dasrue • 3 mo. P4 – exhaust overtemperature protection P5 – subcooling P6 – overheating protection (cooling mode) P7 – overheating protection (heating mode) P8 – protection for overtemperature and under temperature (outdoor) P9 – software control (drive protection) P0 – hardware control (module protection). MRCOOL 18k BTU DIY unit, P0 error code We just finished installing our new MRCOOL 18k BTU unit, and on the first operation it shows a P0 error. P4 error code and poor technical support response from MrCool. What Are Error Codes? - MRCOOL DIY Ductless Mini Split MRCOOL 10. If that doesn't solve the issue call their technical support. What causes error code PC03 on Mr Cool mini split? 3. What does P4 mean on Mr Cool mini split? P4 error code is usually related to the mini splits compressor system. RESULT: Inverter module protection. How to reset error code PC03 on Mr Cool mini split? 4. RESULT: Heating fan fault in the area A lasts for 5 minutes. trane air conditioner error codes trane air conditioner codes trane air conditioner error codes. RESULT: Temperature protection of compressor. Mrcool Do It Yourself 36 000 Btu 3 Ton 16seer Ductless Mini Split Air. Mrcool Diy Mini Split For The Woodshop Problems P4 Error Mrcool Air Conditioner Error Codes Mrcool Air Conditioner Codes Mr Cool Diy Error Code P6 Bypass Fix Mr Cool Diy Not Cooling System Reset (multizone Mini Split Trouble Shoot) ! Otosection We bring you the best Tutorial with otosection automotive based Tags. Make sure both valves are all the way open. A P1 or P4 error code might mean an abnormal rise or drop in the voltage of your MRCOOL system. Installed the MrCool DIY Ductless mini-split in my workshop only to have problems. And do remember that switching from heat to cool or vice versa can take up to 5 minutes for the switch to actually occur. What does E8 mean on a window unit? E8 indicates that there is a problem with the exterior discharge sensor. I got a P4 error on the MRCOOL 24k DIY minisplit system. Will clogged fiters Ask an Expert Home Improvement Questions HVAC Questions gotoman for ac, HVAC Technician 5,490 Satisfied Customers 51 years of experience install design and repair of all makes and models of AC gotoman. What does P4 mean on Mr Cool mini split? P4 error code is usually related to the mini splits compressor system. I'm having the same error code of P4 on a Mr. Compressor keeps running … read more gotoman for ac HVAC Service manager an. How to Prevent Mini-Split Problems The best fix for a mini-split problem is to prevent them in the first place. p4 error p5 error 24 Most Common Air Conditioner Error Codes You don’t have to be an AC or HVAC technician to notice if your air conditioner has problems, because error codes are displayed on the control panel. The P4 error in the owner's manual says it is an inverter compressor drive error. When the compressor current rises above the protection value 24A, the system displays P4 or P5 protection and allunits stop running. How to fix error code PC03 on Mr Cool mini split installed in October? 5. 9k views, 10 likes, 0 loves, 74 comments, 4 shares, facebook watch videos from mrcool: at mrcool, we don't expect you to have problems with your unit,. A high temperature at the discharge line may also lead to a P4 code. ComfortStar AC Error Code = P3 Outdoor low temperature protection. Installed the MrCool DIY Ductless mini-split in my workshop only to have problems. Uploaded by MRCOOL | 2019-05-20 20:29:40 At MRCOOL, we don't expect you to have problems with your unit, but if you ever do see an error code, it's good to at. there is 125 psi standing pressure; 230v from. RESULT: Condenser high-temperature protection. And I haven't even touched anything. MrCool Mini-Split Compressor/Condenser replacement, P4 error code - YouTube see here for more details about how to vacuum the lines:https://youtu. When the voltage signal Inverter Module (IPM) Protection sends the compressor drive chip is abnormal, the display LED will show P6. 6K views 1 year ago Carrier Ductless P4 Error HVAC VLOG 25K views 3 years ago Mini Split Troubleshooting -. Had a person come round saud he couldn't find anything. P4 error code and poor technical support response from MrCool. Waiting on support to respond to my tic. It’s a problem with the fan speed. Condensor fan Starts normally , runs for say 40 seconds or so. On really cold mornings the display is E1. P0 - IPM malfunction or IGBT over-strong current protection P1 - Over voltage or over low voltage protection P2 - High temperature protection of IPM module or compressor top P3 - Outdoor ambient temperature too low P4 - Inverter compressor drive error P5 - Indoor units mode conflict (multi-zone ONLY) P6 - Low pressure protection (Only for 36K). 9K subscribers Subscribe 29K views 3 years ago At MRCOOL, we don't expect you to have problems with your unit, but if you.