بعض كودات اعطال الشيلر carrier

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http://www.mediafire.com/download/qsqz2zwh9z3h7nu/Alarm_and_Alert_Codes.pdf

 

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http://www.mediafire.com/download/c1wka0wvoejahib/AquaSnap®_Air-Cooled_Chillers.pdf

 

[mohamed mech]

جزاك الله خيرا كثيراً

:28::28:
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http://edoqs.com/download/2f3d5aa38abfbd7a3d5a877ddfc722bc

 

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جزاك الله خيرا كثيراً

:28::28:
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وجزاك استاذنا الغالي

 

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http://edoqs.com/download/4c59129296d3e76f125dbee5654a2e1a

 

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http://edoqs.com/download/c14f7fbc8fc9f0c51705603531c1ba41

 

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http://www.4shared.com/office/ISTjQgyW/Air-Cooled_Reciprocating_Liqui.html

 

[ramyacademy]

شكرا

 

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[h=1]CHILLER PROBLEM - MICROPROCESSOR PRESSURE TRANSDUCER ERROR[/h]

SUMMARY This article describes how to fix a chiller with a microprocessor that is not receiving proper input signal from the pressure transducer. SYMPTOMS Microprocessor shows an �Err� on the top screen and a pressure transducer error code on the bottom screen. Pressure transducer errors include: "tL1" for compressor 1 low-pressure sensor error. "tL2" for compressor 2 low-pressure sensor error. "tH1" for compressor 1 high-pressure sensor error. "tH2" for compressor 2 high-pressure sensor error. CAUSE The Microprocessor is not receiving proper input signal from the Texas Instruments (TI) pressure transducer(s). RESOLUTION Several items, that are easy to check as follows, can cause transducer errors: *** Before starting, make a note of THE transducer error code you are reading in the lower microprocessor screen. ********************************** Suction / Discharge Transducer Terminal Identification: RED (Top) = "+5" Terminal on Board WHT (Mid) = "Sig" Terminal on Board BLK (Btm) = "COM" Terminal on Board 1. With power OFF to the chiller: Check wire connections from all transducers at the back of microprocessor board. Proper locations and color-codes for transducer wires can be found on the chiller wiring diagram located on the back of the electrical compartment door. 2. With power OFF to the chiller: Remove the molded plug from each transducer, blow out any dust or dirt and reconnect plug. Note: In most cases, the steps above will correct the problem. After performing the above steps, turn the chiller and microprocessor on and check for the error. If the transducer error code returns, proceed to the following steps. 3. With power OFF to the chiller: Using the codes above, determine the physical location of the transducer that is producing the error and remove the �White� signal wire for that transducer from the back of the microprocessor. 4. Turn the power ON to the chiller and turn the Microprocessor ON. Using an AC volt meter make sure you have from 24 Volts AC and 28 Volts AC between the �24 VAC� and �COM� terminals at the back of the microprocessor control. If you do not have AC power in the range above, STOP as further troubleshooting of the chillers control system will need to be performed. 5. Using a DC voltmeter in the DC scale, measure volts between the �+5� and �COM� terminals at the back of the microprocessor. You should read 4.8 to 5.2 Volts DC. If you read NO volts or volts below 4.8, your microprocessor is defective and needs to be replaced. 6. Using a DC voltmeter in the DC scale, measure volts between the �+5� and �SIG� terminals at the back of the microprocessor. You should read 2.0 to 5.0 Volts DC. If you are not reading voltage between 2.0 to 5.0 Volts DC, then your pressure transducer or gray connection cable are not allowing proper signal to return to the microprocessor board. 7: Remove the connection cable plug from the transducer creating the error and swap the cable with another transducer cable on the system. If the error code moves with the cable swap, then the problem is in the cable. If the error code remains at the original location then the problem is in the transducer. 8. If the problem is in the cable, re-inspect the plug end. If everything seems to be in order, you will need to order a replacement cable. 9. If the problem is with the pressure transducer: - Remove cable plug from the pressure transducer - Using TWO wrenches, of the proper sizes, remove the transducer and inspect the inlet port. Make sure the internal (refrigerant side) of the device is clean and free of debris. Using WD-40 or ,other cleaning agent, clean the transducer. Once clean, re-install and test. If error code returns, the transducer must be replaced. WHEN ORDERING MAKE SURE TO REQUEST EITHER A HIGHSIDE OR LOWSIDE TRANSDUCER. THE TWO ARE DIFFERENT. 10. If you are getting intermittent "ERR" codes and intermittent "lo1","lo2","hi1" or "hi2" pressure trips, you may have a transducer that is getting ready to fail. If this condition is suspected: A. Put the micro-processor in review mode by pressing the "SET" button. B. Scroll by pressing the UP and DWN buttons until you get to the "lo1","lo2","hi1" or "hi2" values on the top of the screen. The value in the bottom screen will be the pressure the micro-process is seeing. C. Using your manifold gauge, verify that your micro-process pressures are within 1-3 PSI of what your manifold gauge is reading for the correct refrigeration ckt. If they are not, use the following formulas to confirm that you have a problem with your transducer > High Pressure Transducer Formula: PSIG = 125 x DC volts between COM and SIG minus 62.5 > Low Pressure Transducer Formula: PSIG = 50 x DC volts between COM and SIG minus 39.7 Using these formulas you can you can determine what the micro-pressure readings should be based on you signal voltage. If the micro is reading the correct pressure for the voltage returning, than you have confirmed the transducer or the cable is not working correctly. If the micro is reading an incorrect pressure for the voltage returning, than you have confirmed the transducer is OK and the micro needs to be replaced. ** Procedure ONLY to use in an emergency ** Note: Should equipment damage occur while this procedure is deployed, Legacy Chiller Systems will NOT warranty damage or be held responsible for direct or indirect property damage or personal injury that can happen. *** Procedure: Installation of a 10k ohm resistor between the +5 and Signal connections should result in a pressure reading within mid range of the transducers rated pressure scale. This can be done on either high or low pressure transducers. Adjustment of pressures in programming mode will be needed. This procedure should only be used as a temporary fix until factory replacement parts can be installed.

 

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[h=1]CHILLER PROBLEMS - MICROPROCESSOR LOW PRESSURE ERROR[/h]

SUMMARY This article describes how to fix a chiller system that, after startup, has a stopped compressor and a low pressure error. SYMPTOMS Low pressure (Lo1 or lo2) error message on microprocessor controller. After power up and compressor start, compressor stops before reaching the SP1 or SP2 set point and the micro processor indicated a �Lo 1� or "Lo 2" in the top screen, the trip pressure in the bottom screen and the low pressure indicator light on the micro is lit. . CAUSE Upon compressor start, the micro processes monitors the Suction or Low-Side pressure of the refrigeration system. If at any time during a run cycle the micro sees low-side pressure below the LP set point for more than 90 seconds, the micro will lock out the chillers compressor until the micro is reset. The micro will then display the above faults and lock out the chillers cooling system(s). RESOLUTION A micro reset can be achieved in two ways. First, by pressing the power button for 2-3 seconds. If that does not work, turn main supply power to the chiller OFF for one minute and then back on. Low-pressure trips should not happen provided the system is started up properly therefore further investigation is unusually needed. Check the following items BEFORE resetting from a Low Pressure trip: 1. Make sure your pump is turning in the correct direction. You can check for pump direction by CAREFULLY sliding a nylon wire tie through the air vent at the end of the pump housing. When your wire tie makes contact with the plastic cooling fan the end will be forced up or down depending on the direction of spin. If the wire to end goes UP the pump is spinning CW and if DOWN CCW. Located at the end of the pump there is an arrow embossed into the SS head of the pump. This arrow will indicate the design rotation. You pump MUST be spinning the same direction. On THREE PHASE systems only, if your pump is spinning the wrong direction, STOP turn the main power OFF to the chiller and reverse any two legs of power on the main buss. Turn power back on and recheck rotation. On Single-phase chillers, if your pump is running the wrong direction, please call the factory for further instruction. 2. Clean ALL filters and strainers: Restrictions to flow through the chillers cooling system WILL cause Lo 1 trips. On PACT and EST systems with integrated water storage tanks a common problem is a plugged strainer located just above the tank recirculation pump discharge. Before processing with any other steps, turn the power to the chiller off and clean the strainer. On all chiller models, the factory recommends a filter or strainer on the FROM PROCESS loop line to prevent debris from entering the chiller. If you have an ES,PAC system such filters and strainers must be cleaned, as they WILL cause low flow errors. *3. Make sure your LP micro trip point is set at 54 PSI. *4. Make sure your SP micro setting is no lower than 45F. * If your process requirements require settings lower that above, glycol freeze protection must be used to prevent Lo 1 trips and provide freeze protection. 5. If your chiller is equipped with a flooded condenser option, make sure both liquid refrigerant king valves entering and leaving the receiver are fully back seated � OPEN. These valves are shipped in the closed position from the factory. 6. Make sure ALL wire connections on the back of the microprocessor are tight. If there is any excess wire shielding on the gray transducer cables showing, tape the area with black electrical tape. Make sure that NO stray wires from the micro are touching the case or any other wire connection on the back of the micro. 7. Is the refrigeration system low on charge? A quick why to determine a low charge is to install a manifold gauge set on the high and low side of the refrigeration system. After resetting the chiller and compressor starts, carefully watch your gauges. A ball park for design high side pressure is ambient +30 converted to PSIG. A ball park for design low side pressure is chiller leaving fluid temp � 5F converted to PSIG. Example: An R-22 system at 60F ambient 50F chiller leaving temperature will run a high side pressure of about 175 PSI and a low side pressure of about 60 PSI. If both pressures are low, a leak inspection may be advisable. Note: A PDF version of a TP chart for most common refrigerants has been linked to this article below. If 1-7 above does not solve the low-pressure trip issue it is recommended that you call the factory for further support at 877-988-5464. MORE INFORMATION Recommendations in this article should be preformed by QUALIFED service personnel who have extensive experience with high voltage/control electrical and plumbing systems. Individuals who lack such experience can cause damage to this equipment that would not be covered under warranty. More importantly, injury and even death can occur. APPLIES TO All chiller models RELATED DOCUMENTS Pocket_TP_Chart

 

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[h=1]CHILLER SYSTEM MICROPROCESSOR PROGRAMMING[/h]

SUMMARY This article provides you with detailed information about chiller system microprocessor programming and review. We provide you with everything you need to know about the PSG microprocessor controller. SYMPTOMS Need to review or update the programming of chillers microprocessor controller CAUSE When adding glycol to the chiller loop or in some instances during startup or service review or adjustments need to be made to the microprocessor programming. RESOLUTION The Legacy microprocessor controller provides a review and programming (or update) function accessible from the controllers touch pad. The attached service bulletin provides information on review, programming as well as other useful information. APPLIES TO All models with PSG microprocessor controller - All software versions RELATED DOCUMENTS Micro_programming_info

 

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[h=1]CHILLER PROBLEMS - MICROPROCESSOR LOW FLOW ERROR[/h]

SUMMARY This article explains how to fix your chiller when the compressor won't run and there is a microprocessor low flow error. SYMPTOMS Low flow error message on microprocessor controller. Compressor will not run. CAUSE Micro-Processor "Low Flo" faults can be caused by: 1. Evaporator flow issues related to your pump. 2. Evaporator flow issues related to a restricted filter or strainer. 3. Excessive air in chillers pumping system that is causing false readings on your flow sensor. 4. If your system is running glycol, your concentration of glycol has changed since the systems was originally commissioned. RESOLUTION Before calling factory technical support, it is recommended that user check/try the following: 1. On all PACT and EST model chillers, make sure the tank recirculation pump is running. 2. Make sure your pump is turning in the correct direction. You can check for pump direction by CAREFULLY sliding a nylon wire tie through the air vent at the end of the pump housing. When your wire tie makes contact with the plastic cooling fan the end will be forced up or down depending on the direction of spin. If the wire tie end goes UP the pump is spinning CW and if DOWN CCW. Located at the end of the pump, there is an arrow embossed into the SS head of the pump. This arrow will indicate the design rotation. Your pump MUST be spinning the same direction. On THREE PHASE systems only, if your pump is spinning the wrong direction, STOP, turn the main power OFF to the chiller and reverse any two legs of power on the main buss. Turn power back on and recheck rotation. On Single-phase chillers, if your pump is running the wrong direction, please call the factory for further instruction. 3. Clean ALL filters and strainers: Restrictions to flow through the chillers cooling system WILL cause Low Flow errors. On PACT and EST systems, with integrated water storage tanks, a common problem is a plugged strainer located just above the tank recirculation pump discharge. Before proceeding with any other steps, turn the power to the chiller off and clean the strainer. On all chiller models, the factory recommends a filter or strainer on the FROM PROCESS loop line to prevent debris from entering the chiller. If you have an ES,PAC system such filters and strainers must be cleaned, as they WILL cause low flow errors. 4. Bleed air from the high side of differential flow switch. Inside the chiller located on the back of the electrical bulkhead, there is a blue box with two chrome towers one marked "HIGH" and one marked "LOW". With the pump running, using a wrench, carefully loosen the brass compression nut at the high connection. DO NOT remove this nut. The goal is to loosen the nut enough to bleed the air out of the high side tubing. Once you see only fluid coming out of the tube (no bubbles) re-secure the nut being careful to not over tighten. 5. If your system is running glycol, check your freeze point. To do this, you will need an optical-Refractometer. These can be purchased at :>http://www.legacychillers.com/onlinestore~action~detail~intID~95.asp. Once your freeze point is confirmed, it should be checked against the original design glycol percentage for your system. That information can be found in your Legacy factory order confirmation. In order to prevent glycol concentration related flow errors, your actual percentage should be within 2% of your design. After performing steps 1-5 above and your low flow error has not cleared then proceed to step #5 below. 5. Since you have already located the differential flow switch in step #4 above, remove the four SS screws holding the cover on. Inside the box you will see an arm with a small RED hex nut at the end. The red hex nut is the calibration adjustment for this control. With the pump running turn the hex nut CW until the switch closes and the error clears. VERY IMPORTANT you must cycle the pump ON and OFF manually (using the pump motor starters RED manual stop button)to make sure the switch opens when the pump stops. Each time pump is turned off, you should get the low flow error. If you do not, further adjustment to the flow switch is needed. If the chillers cooling system runs without confirmed water flow through the evaporator you will cause non-warranty damage to your chiller. MORE INFORMATION Recommendations in this article should be preformed by QUALIFED service personnel who have extensive experience with high voltage/control electrical and plumbing systems. Individuals who lack such experience can cause damage to this equipment that would not be covered under warranty. More importantly, injury and even death can occur.

 

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[h=1]GLYCOL - ADDING TO CHILLER LOOP[/h][h=1]

SUMMARY This article describes the steps that should be taken to add glycol to a chiller system. The article addresses some important things that must be considered in this process. SYMPTOMS There are many applications where a chillers process loop has the possibility of freezing by way of (direct or indirect) contact with cold ambient air temperatures or the process requirement of a chiller requires colder temperatures. This article addresses items that must be considered when adding glycol to a process chiller. All chillers shipped by Legacy Chiller Systems are set up from the factory to run water only. This is done by design even if the customer supplied specifications call for process temperatures that WILL require glycol freeze protection to be added. The reason for setting chiller up this way is to prevent potential freeze damage to the equipment prior to glycol installation in the field. Should a chiller require glycol freeze protection, adjustments may need to be made to several key components of the chiller to for trouble free operation. CAUSE Failure to make adjustments to a chillers refrigeration and control system for glycol operation can cause the following operational issues: 1. Poor cooling output 2. Low pressure (Lo1) safety trips 3. Process high temperature (HTA)alarms 4. Low flow safety trips RESOLUTION The following steps should be followed when adding glycol to a Legacy chiller: 1.Determine total system volume: For tank model chillers, (PACT,PWCT and EST models) volume is stated in the appropriate catalog sections. In addition to volume in the chiller, field calculations should be made to determine volumes in all external piping, fittings and the process equipment being cooled by the chiller. 2.Determine glycol concentration: Once total system volume is estimated, a target fluid loop freeze point must be determined. This is done by using a glycol freeze table, provided by the glycol manufacture. Attached, to this article generic tables have been provided. NOTE: NOT ALL GLYCOL MANUFACTURES HAVE THE SAME FREEZE POINTS. Once the desired freeze point is determined, use this simple formula to determine the amount of glycol needed: Glycol gallons = (total system volume) x (glycol concentration % needed to achieve desired freeze point). Example: Total system volume 200 of gallons. You need a 50% concentration of food grade propylene glycol to achieve �30F a freeze point. Result: 200 x .50 = 100 gallons of glycol. Note: When determining your desired freeze point, it is important to remember that the refrigerant temperature in the chillers evaporator can be as much as 20F colder than your SP1 set point. Because of this, it is recommended that enough glycol be added to prevent freezing or restricted flow as fluid reaches the outlet of the evaporator. For example: If your SP1 set point is 20F, your glycol concentration should be high enough to achieve a 0F freeze point. 3.Confirming freeze point: After adding the estimated amount of glycol to the system, the actual freeze point MUST be confirmed using an optical refractometer. ONLY when the freeze point is confirmed should the technician proceed with the following steps. NOTE(1): NEVER ADD GLYCOL UNTIL ALL AIR IS REMOVED FROM THE SYSTEM. ALWAYS ALLOW GLCOL TO MIX IN SYSTEM FOR 15-30 MINUTES BEFORE TAKING LOOP FREEZE POINT READINGS. Note(2): Hoffman #79 automatic air vents are recommend on the supply and return main heaters at the highest points in the system to remove air from the process loop. 4.With the all air out of your system, glycol mixed and freeze point confirmed the following adjustments can be made: A.Set microprocessor LP trip: The factory pre-set for the LP trip is 54PSI (R22). Now that your freeze point is lower after adding glycol you should adjust this set point using the following formula: LP set = (confirmed freeze point) + (10F safety factor) converted to PSIG. Example: Freeze point is �30F on an R-22 system. Result: (-30F)+(10F) = -20F. �20F R22 = 10PSIG. In this case the LP trip point on the microprocessor should not be set lower than 10 PSIG. Attached to this article temperature / pressure relationship charts have been provided. B.Adjust hotgas bypass (HGBP) system: All Legacy Chiller Systems are equipped with (HGBP). Under low-load, low ambient, low SP temperature setting conditions this valve may need to be adjusted to begin opening at a lower pressure other then the factory pre-set of 54 PSI.. Legacy recommends setting the initiation of HGBP no less than 10 PSIG higher than your adjusted LP trip point. For example, in using the 10 PSIG LP setting (Section 4a above) you would set your HGBP valve to start opening no lower than 20 PSIG suction. Attached to this article is additional information on the HGBP valve. C.Adjust: TXV (also referred to as a TEV valve) superheat setting: In most cases making adjustments to the TXV is not needed however depending on operating conditions this may be needed. Legacy recommends a superheat setting in the range of 8-12 degree F. Attached to this article is detailed information on TXV operation, adjustment and advanced troubleshooting. D.Flow switch re-calibration for glycol: Before leaving the factory, the chillers differential flow control safety is calibrate using water only. Since adding glycol to the process loop changes the viscosity of your process loop fluid, low flow errors can happen intermittently after adding glycol. See knowledgebase article concerning low flow errors for detailed instructions on how to re-calibrate the flow switch. IMPORTANT: AT ANY TIME IF FRESH WATER IS ADDED TO A GLYCOL SYSTEM, THE FREEZE POINT MUST BE RE-CONFIRMED AND MORE GLYCOL MUST BE ADDED. FAILURE OF THE FREEZE POINT TO BE AT OR BELOW THE SETTING MADE IN STEPS ABOVE CAN RESULT IN SEVERE DAMAGE TO CHILLER EQUIPMENT. SUCH DAMAGE IS NOT COVERED UNDER THE MANUFACTURES LIMITED WARRANTY. APPLIES TO All models RELATED DOCUMENTS HotGas Bypass Valves Pressure Temperature Charts

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[عمران احمد]

جزاكم الله كل خير
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و الى الامام دائما

 

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[ibrahim1hj]

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مشاركة متميزة و مجهود يستحق التقدير و الإمتنان , جزاك الله خيرا , و زادك علما و إيانا ان شاء الله

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