“York Heat Pump Trouble” , posted Thu 2 Oct 11:31 ______________________________________________________________________ Hi All, I have a York High Efficielcncy “Stellar” Heat Pump model# E2FH036S06A. It is equipped with the “YorkGuard IV module# 031-00832″. Just recently when in heat mode, the outdoor unit will stop completely and the thermostat emergency heat light will blink 5 times sequencially (and so does the module in the heat pump of course). According to the manual, this indicates a “defrost fault or failure”. Now what? Also, I have noticed in the past that my emergency heat did not seem to come on during defrost mode, the ducts produced cold air at this time. I have worked on heat pumps and air conditioners for years but I haven’t fooled much with this module. I haven’t put guages on it yet…. Any advice would be greatly appreciated! Replies: HVACRguy “Re(1):York Heat Pump Trouble” , posted Mon 3 Dec 19:25 ______________________________________________________________________ I have a E2FH030506B that has a code 7 flashing. The customer replaced the outdoor air sensor that their book said was the fault, The problem is still there and i have to go out tommorrow, Any suggestions?? Xenos Webmaster “Re(1):York Heat Pump Trouble” , posted Thu 2 Oct 17:53 ______________________________________________________________________ I would be checking all the connectors on the defrost sensors as these connectors corrode quite often and their resistnce is important. If your aux heat is electric then yes it should come on in defrost mode. If oil or gas is aux heat then it wont. Xenos. The best way to escape a problem is to solve it. vic2cu “Re(2):York Heat Pump Trouble” , posted Fri 3 Oct 10:37 ______________________________________________________________________ Thanks Xenos, I’ll check the connections. You do mean the ones that connect to the “York Guard IV” module right? I’m also going to put guages on her tonight. The manual that came with the unit also suggests that the charge may be low (causing low line temp and making it go into defrost mode more than 2 times in an hour) Makes sense… I’ll post my results Xenos Webmaster “Re(3):York Heat Pump Trouble” , posted Fri 3 Oct 17:17 ______________________________________________________________________ No, I am referring to the ones connected to the defrost board. If I am not mistaken York uses thermisters to sense temperatures and these are sensitive to resistance changes. Xenos. The best way to escape a problem is to solve it. vic2cu “Re(4):York Heat Pump Trouble” , posted Mon 6 Oct 06:43 ______________________________________________________________________ Well, it seems she was low on refrigerant. Connected guages only to find that my suction pressure was 20 psig! Charged it until I got a steady 15 degrees superheat. Runs as designed. Oh, the “York Guard IV” box does in fact control the defrost mode and all other functions as well. There is no seperate “defrost board” in this particular unit. There are however thermistors sensing all of the line and ambient temps. Thanks again Xenos! vic2cu If you don’t have the time to do it right the first time then how do you find time to go back and fix it? Libby “Re(5):York Heat Pump Trouble” , posted Thu 4 Dec 12:12 ______________________________________________________________________ I have a york Heat pump model E2FH030 with a York guard IV. I live in MD and I have an icing problem. I believe my unit is not going into defrost cycle and also I may be low on freon. The book says to jump terminal J & C to put it in defrost manually. This did not work. I still have frost over entire coil. Is it possible that I am just so low on freon? How do you measure super heat and what amount of super heat do I need if I put my gauges on there and add freon? Thanks Libby vic2cu “Re(6):York Heat Pump Trouble” , posted Thu 4 Dec 13:48: ______________________________________________________________________ Libby, Are you sure it is not going into defrost? If it is low on freon, it will go into defrost frequently and prematurely because it is sensing too cold of a temperature on the condenser coil. Being low on freon will cause this. Before you do anything, put gauges on it and see what kind of pressures you have (in cool mode). To measure superheat, you must have some kind of pretty accurate thermometer. Put the thermometer’s probe on the suction line close to the shrader valve and preferably under the black line insulation. let the temperature stabalize and observe your suction side gauge reading. “Superheat” is the (number) difference between the suction side temperature on the gauge and the temperature on your thermometer. On your gauges, you will see 3 scales underneath the pressure scale towards the center. They are labeled R-502, R-22 and R-12. The one of course you will be looking at it is the “R-22″ scale. This number is the number you use to compare to your line set (thermometer) temperature. Example: You have 60psi, so look down at the “R-22″ scale and the number will be 34. This number is the number you use to compare to your line set (thermometer) temperature. So, if you have 34 on the gauge and line set temp of 54, your superheat is 20. You should be somewhere between 16 and 20 degrees superheat when you take the difference between the 2 numbers. If the number is higher, you are low on freon. If is is lower, it could be overcharged but I doubt that is the case. Add freon until you get the desired superheat and that should cure it unless your board or sensor is faulty. Hope it all made sense. Good luck.. vic2cu If you don’t have the time to do it right the first time then how do you find time to go back and fix it? [this message was edited by vic2cu on Thu 4 Dec 14:33] Libby “Re(7):York Heat Pump Trouble” , posted Fri 5 Dec 21:57 ______________________________________________________________________ Vic, I havent had a chance to check it out yet.I have been at work a lot.I plan on checking it out this weekend.Thanks for the reply. The only thing I am unsure of is where to position the thermometer probe to get the acurate reading for determining the superheat. Are you saying to get the temp on the outside unit suction line going into the compressor?Or Since there is no insulation on that line, do you mean on the indoor coil somewhere? The temp here has been about 28 at night and 40 day time, still icing up. Attempting to service this unit sufficiently as conditiions permit by switching to the cooling mode and using the superheat method. Any other method or info is welcome. Libby xenos Webmaster “Re(8):York Heat Pump Trouble” , posted Sat 6 Dec 09:40 ______________________________________________________________________ Libby you can check the temperature outside just make sure to put some insulation on the probe. Actually there may be a charging chart on the unit once you open it up that will tell you what temperatures you are looking for. Xenos. The best way to escape a problem is to solve it. Libby “Re(9):York Heat Pump Trouble” , posted Sat 24 Jan 23:26 ______________________________________________________________________ I have replaced a liqiud line sensor, this has cured my defrost problem.However when the temp is low enough outside my unit will lock out with a 4 code if i reset it it will be fine for about a hour then it locks out again. I insulated the new sensor but that was no help it continues to lock out. Any help is appreciated.. xenos Webmaster “Re(10):York Heat Pump Trouble” , posted Sun 25 Jan 08:09 ______________________________________________________________________ Do you know what code 4 is ? I don’t Xenos. The best way to escape a problem is to solve it. Xenos Webmaster “Re(7):York Heat Pump Trouble” , posted Thu 4 Dec 19:44 ______________________________________________________________________ Love that tag. Xenos. The best way to escape a problem is to solve it. Libby “Re(8):York Heat Pump Trouble” , posted Sun 25 Jan 21:12 ______________________________________________________________________ Code 4 problem says Discharge temp did not reach approx 90 degrees F within 1 hour of compressor operation. Any suggestions out there on how to resolve a code 4 problem on a York 2.5 ton heat pump with a York Guard IV module? Thanks for you help. Libby xenos Webmaster “Re(9):York Heat Pump Trouble” , posted Sun 25 Jan 21:42 ______________________________________________________________________ Better check the charge. Xenos. The best way to escape a problem is to solve it. vic2cu “Re(10):York Heat Pump Trouble” , posted Mon 26 Jan 07:37 ______________________________________________________________________ The refrigerant is low. Charge the system per my last instructions. That will solve it. vic2cu If you don’t have the time to do it right the first time then how do you find time to go back and fix it? libby “Re(2):Re(10):York Heat Pump Trouble” , posted Wed 28 Jan 20:52 ______________________________________________________________________ The gauges showed the charge was within range and I added refrigerant and gauges show within range….any other suggestions? Thanks Libby vic2cu “Re(3):Re(10):York Heat Pump Trouble” , posted Thu 29 Jan 06:04 ______________________________________________________________________ You said “The gauges showed the charge was within range and I added refrigerant and gauges show within range”. Okay, if the charge “range” was correct, why did you add refrigerant? What were your guage readings? vic2cu If you don’t have the time to do it right the first time then how do you find time to go back and fix it? xenos Webmaster “Re(3):Re(10):York Heat Pump Trouble” , posted Wed 28 Jan 21:56 ______________________________________________________________________ What were the pressures and temperatures? Xenos. The best way to escape a problem is to solve it. stef b “Re(4):Re(10):York Heat Pump Trouble” , posted Tue 27 Feb 10:26: ______________________________________________________________________ looks like your system is overcharged to me try removing refrigerant. you should see your discharge line temperature rise by doing so. you cant rely on system pressure to check for system charge i had the same problem once, the other company never found the problem.so the customer called us. long story short i ended removing 9 lbs of freon, and the reading on my gauges never changed.but the discharge line temp went from 78 deg. to 135 deg. a better way to check for charge is with subcooling [this message was edited by stef b on Tue 27 Feb 10:27] heatpumpguy “Re(5):Re(10):York Heat Pump Trouble” , posted Tue 4 Mar 11:27 ______________________________________________________________________ i would have to agree, last week one of the guys was charging a 3 ton with out a scale and his thermometer was out of calibration, when i got the call back it was overcharged by 3.5 lbs heatpumpguy it’s all about the basics

Comments are closed.