copeland digital scroll compressor troubleshooting

0000005447 00000 n • ZP Copeland Scroll Compressor Range for R410A • ZP Copeland Scroll Air Conditioning Compressor Range, Optimized for Seasonal Performance • ZPD & ZRD Copeland Scroll Digital™ Compressor Ranges for R410A and R407C • XPV & ZPV Copeland Scroll Variable Speed Compressor Ranges for R410A ZB Series Scroll Compressor. 0000139711 00000 n The Copeland Scroll™ compressor is your most reliable compressor solution. Energy Efficiency 6. If you have problems accessing your account, please contact us at 1 … endstream endobj 114 0 obj <> endobj 115 0 obj <> endobj 116 0 obj <> endobj 117 0 obj <> endobj 118 0 obj <>stream 0000013433 00000 n %PDF-1.7 %�� The recommended superheat at the compressor is … Operating Envelope 5. The Copeland Scroll™ K5 ... troubleshooting on a new WALK IN BOX. If this is not achieved, then measures such as While it's running unloaded, measure the amperage of the compressor. 0000156641 00000 n If the expected result is not achieved, shut the compressor off and remove the rectifier from the compressor. With high energy savings, extended reliability, low operation noise, and easy installation, H-series compressors perfectly meet today's high user expectations. 0000182871 00000 n ZB Series of refrigeration scroll compressors are ideal for compact system designs that require a high degree of reliability and energy-efficiency. startxref Danfoss H-series scroll compressors operate equally well in cooling or heat pump applications. <<5D37B0E6081DDF41AC96FDD231EC87C6>]/Prev 676716>> .�%xM^�7� xKނw��~''��LOO/d��t�p��|��A� p:�}}�}}��/��O@>��d��I@&�>>�3*�+�+�+�+�+�+�+�+�+�+�+�+gW̮�s/f��\��(�e&�L��(2Qf��D��"c&�L��o�7��o�7��D�b��ғ�_ 0000184089 00000 n If functioning normally, the Digital Compressor Controller should display a Code 6 unless a previous ALERT code was present. �7�D+l�l�q+�,��#l��d��4 XxЧ�g=!Ȃ�Z�}��3/�m�u��w3&X��6Hڏ(T�р��hz��_ߩ~0?��8 ux/oN�{(��(Kٌ��\X��G� 0 �2q� ��N]A��nߵ�˿�}}��;�]3�[��N��vٲpM[Og�w}=Y��)^�ݹϪ��?��4>�Ӻ�O�9˿�M��~m�. Danfoss inverter scroll compressors for commercial air conditioning deliver the highest possible cooling capacity using variable-speed technology. 105 0 obj <> endobj endstream endobj 120 0 obj <> endobj 121 0 obj <>stream Head Pressure Control The RSMSD can monitor a Head Pressure Transducer and control a Design Features 4. s��\A�0W�+�� A scroll compressor (also called spiral compressor, scroll pump and scroll vacuum pump) is a device for compressing air or refrigerant. Digital scroll compressors match compressor output to an operation’s cooling needs through a simple mechanical design. The Digital Compressor Controller is designed only for single phase Copeland Scroll . There should be approximately 20 to 40% change in amperage. 0000072288 00000 n H�\�ˎ�@E�|E/g#l��j��%?f$/�P�|� m)��D Blocked filter that would cause low suction pressure and high superheat back to the compressor. Thermistor Input – disconnect the discharge temperature sensor wires from terminals T1 and T2. Compressor Start & Run Windings Whether it is a scroll compressor or a reciprocating compressor (of which scrolls and reciprocating compressors make up the bulk of residential air conditioner or heat pump compressors in use today) there are two major components to the compressor. The Copeland Scroll Digital compressor will not operate properly below the dotted line. 0000156342 00000 n 0000007155 00000 n As we know that a Digital Scroll operates in two stages - the "loaded state", when the solenoid valve is normally closed and "unloaded state", when the solenoid valve is open. 0000183701 00000 n 0000048212 00000 n The compressor should have pulled down to at least 15 inches of Hg. endstream endobj 106 0 obj <>>>/Metadata 103 0 R/Outlines 87 0 R/Pages 100 0 R/Type/Catalog/ViewerPreferences<>>> endobj 107 0 obj <>/ExtGState<>/Font<>/ProcSet[/PDF/Text/ImageC]/Properties<>/Shading<>/XObject<>>>/Rotate 0/Tabs/W/Thumb 88 0 R/TrimBox[0.0 0.0 612.0 792.0]/Type/Page>> endobj 108 0 obj <> endobj 109 0 obj <> endobj 110 0 obj <> endobj 111 0 obj <> endobj 112 0 obj <> endobj 113 0 obj <>stream 0000002452 00000 n 0000048040 00000 n Thermistor Input – disconnect the discharge temperature sensor wires from terminals T1 and T2. As one of the leading 4hp copeland scroll digital zrd compressor manufacturers and suppliers in China, we warmly welcome you to buy cheap 4hp copeland scroll digital zrd compressor in stock here from our factory. 0000005830 00000 n 0000182910 00000 n �B�_PtY�4[l]��l6��~+�]��*��:�\V�� All products are with high quality and competitive price. Than with Y1 energized also energize Y2. View and Download Emerson ZB Copeland Scroll product manual online. 0000000016 00000 n These compressors can be used in a variety of applications, including but not limited to, air conditioning systems, transportation, and of course, refrigeration. 0000002256 00000 n Also check for loss of refrigerant charge or re-circulation of the condenser air. This application guideline deals with Copeland Scroll Digital™ compressors for 0000226893 00000 n 0000016220 00000 n The Copeland Scroll Digital compressor controller is designed only for single phase Copeland Scroll Digital compressors and three-phase Copeland Scroll Digital and Discus Digital compressors. 0000005942 00000 n I�B Only in my second year as a tech so I look for all the knowledge I can get. Check the running superheat. Reliability is a major concern in most refrigeration applications. Being that the scroll is a refrigerant cooled compressor, checking the superheat at the compressor would be beneficial. Input Tests. Input Tests. H�\��j�0��~ 0000026619 00000 n 0000013317 00000 n It is the most efficient and durable compressor Emerson Climate Technologies has ever developed for air conditioning and refrigeration. Below is a cut-away of a scroll compressor. Precise Load Matching 7. 0000200269 00000 n Refrigeration compressors 1.3 to 7.5 hp (15 pages), Refrigeration compressors 7 to 15 hp (10 pages), Application guidelines for 1.5 to 6.75 ton refrigerant r-22, 407c, 134a compressors (18 pages), Compressors for comfort, precision and process cooling (40 pages), Horizontal compressors for air-conditioning applications (27 pages), Compressors for co2 subcritical refrigeration (r-744) (14 pages), Compressors for heat pump applications (40 pages), Manual will be automatically added to "My Manuals", Emerson Copeland Scroll Installation And Reference Manual, Heat Pump Emerson Copeland Scroll User Manual, Air Compressor Emerson Copeland Scroll ZBKC Application Manuallines, Air Compressor Emerson Copeland Scroll ZB KC Series Application Engineering Bulletin, Air Compressor Emerson Copeland Scroll ZR KA Series Application Engineering Bulletin, Air Compressor Emerson Copeland Discus Series Application Manuallines, Air Compressor Emerson Copeland Scroll Digital ZFD13KVE Application Manuallines, Air Compressor Emerson Copeland Scroll ZR24KRE Application Manuallines, Air Compressor Emerson Copeland Scroll ZRH49K Series Application Manuallines, Air Compressor Emerson Copeland Scroll ZO21K5E Application Engineering Bulletin, Air Compressor Emerson Copeland Scroll YH04K1E Application Manuallines, Air Compressor Emerson Copeland Scroll SZV32 Installation, Operation & Maintenance Manual, Air Compressor Emerson Copeland Stream 4MF-13X Application Manuallines, Air Compressor Emerson Copeland Scroll ZP K6 Series Bulletin, Page 5: Digital Scroll Advantage For Rack Systems, Page 28: Stas Steel Liquid And Suction Line Filter Drier, Page 29: Adks Liquid And Suction Line Filter Drier, Page 32: Hmi-Hermetic Moisture Indicators, Page 37: Scroll Rack Application Guidelines, Page 43: Digital Compressor Rack Controller-Xc645Cx. 0000184547 00000 n Copeland Scroll Digital compressors have one Scroll compression set driven by a single or three-phase induction motor. 0000024232 00000 n Turn off the compressor and observe the reading. Put in a new copeland scroll ZR48k5e-pfv-800 in a 2003 rheem A/C. 0000016482 00000 n More Images Free-eBooks is an online source for free ebook downloads, ebook resources and ebook authors. trailer We will use this cut-away of a Copeland Compressor to explain how it works. 4. 30% to 50% of the cases found nothing wrong. 0000006191 00000 n ZA5��P)Ϡ7(�~@dd� With over 26 million scrolls installed, and thousands in refrigeration applications, Copeland understands your need for reliability. 0000200018 00000 n Start Up and Shut Down To improve the starting characteristics of the digital scroll compressor, the the Emerson controllers delay �� )Q 0000005716 00000 n - YouTube 0000008045 00000 n H�\�͊�@��y�Zv/�h�ֽ-��np1?�3��I�q��O��&�~!�=_��nߵ��}}��;�]3�k��vٲpM[O�w�w}��,O��/��ge��_��u��a��?�&�mwv��G�n��/��׮��4�[5|�.��}��)��!�b�_R��x�:�Uw�Y�H�ڕo�Zg�k�{�+. 0000200242 00000 n �En�R��Y��#1Mo��G�XzEt$6̵h�R�Z�2��v&��*��!ٝŢ�W�)$�w2�s��(ܘ�ء��!�5�VƄN�.�[й&��K}��2��O#>Y��F�H�q��t_H�fu��:/��v��L��0 KC�@�\�+�E0��QE�Q qC��H[Z��j(�HG�Dd83pv�i ;T�A�I�!�!�)�ɞ1��-�'�p�P�{L��O�\� Y�˚!��K��Ds��9��nC�#. Scroll Compressor Basics 2. endstream endobj 119 0 obj <>stream This category contains compressors manufactured by Copeland Compressors. �Cq�K/&��rX[��[��m琷��&�e��%��.��R0&��sX� �8:/�5Xgң*��t��n�N��P 0000155071 00000 n 0000155495 00000 n The rotor shaft axis is in the vertical plane. Copeland refrigeration scroll compressors offer outstanding solutions for medium and high temperature applications. xref h�b```b``��A��b�,/x00�=]�[� ��1�R9�w-�+�ʔYعt,�T�xR��2"@��D��-R ��X� Read Free Copeland Refrigeration 0000021751 00000 n 0000016183 00000 n {m�Wokzz+Y��2�2�a�eH�f�a�d� �L�G��@��$c�� !�ъq��Ռ:��d�c��8��-�c� ��0.e�Q�yBC��x��n�J�Evj~ ��n�*��.�P�� # �e��O��5��|}�טqù6�k��^��7�zڑ��>R��1m!�5��5�.~�lC?�� Copeland Digital Scroll Technology & AdvantagesTechnology & Advantages Presented by: Bruce Hilsabeck Application Engineer – Copeland Australia / New Zealand Introduction 1. H�\�͊�@F�>E-��Z�OAh� d1�Mg��V2�D�by��ԑ4��Q�W�p�i�{� �,�?�{7�c?t�]ƫo�8�S?$�]��LI��λ�8&��H?��o��9I�}�|?��ӟz�,��u��f��;��9;�Ʋ�]��%�|��69!#�4ӎ��LM�|3�\��U��6\e��s��pl�6>�^�׳Lfe� Each compressor has an electric motor and an assembly of mechanical components which are driven by … 0000226854 00000 n 0000184639 00000 n 0000045390 00000 n Hello Everyone, I have a question about Digital Scroll Compressors. WIC. 0000003954 00000 n Page 1 Copeland Scroll ZB digital compressor...; Page 2 About Emerson Climate Technologies Emerson Climate Technologies, a business segment of Emerson, is the world’s leading provider of heating, air- conditioning and refrigeration solutions for residential, industrial and commercial applications. First off, “Know what kind of sensor you are measuring,” said Lanzer. 0000003035 00000 n 0000184477 00000 n 167 0 obj <>stream Actively protects Copeland Scroll compressors from critical failure Uses the compressor as a sensor for system health Five system alert codes Data port for fault history download ... of troubleshooting Stores system and fault history for download Vapor injection system delivers more cooling capacity. 0000199749 00000 n ?܇�O��nr�Z�&�S�/��]>/{�7�~;=^Қ��+��%e꾉��X��]bV-ұr�{:VY��.��t�Ǭ*��"�$^��`O��@`%+�� 0000019014 00000 n What are the primary causes of all premature compressor failures? Digital Compressor Technology 3. While they operate on the same basic principle as a piston compressor—in that there is a proportional relationship between pressure and volume, and reducing the vapour volume results in an increase in pressure—the scroll has one distinct advantage, the action produced by the rotating scroll plate moving against the … The Digital Compressor Controller is the electronics interface between the Copeland Scroll Digital™ compressor or the Copeland Discus Digital ™ compressor and the system controller. Suction gas, oil, and droplets of liquid refrigerant enters the compressor through the larger of the two stubs located ¾ of the way up on the side of the shell. This copeland digital scroll compressor manual, as one of the most in action sellers here will unconditionally be along with the best options to review. Both Copeland and Bristol make scroll compressors. This number decreases as compressor size … The minimum . 0000072025 00000 n 0000183298 00000 n 0000001556 00000 n 0000048110 00000 n 0000155998 00000 n I was sent out on a job to change out a bad compressor that someone else had already diagnosed as bad. Scroll Compressor Reliability. ۘ��I熤�]��:�t$.joc�� Available ZB Series is in the range of 2-15HP. ��f�9h�`�C��e*��q�8h,��q�8h��t��ӫ;�,ǡR��g�u�u��?��=��8qY��w��c��q��K�0 �� How the Copeland diGital Scroll compressor works and what a service person can expect to see in normal operation The Scroll compressor has been under development at Emerson Climate Technologies since 1979. Scroll Compressors. Check the condenser or evaporator fan for proper operation. 0000004927 00000 n If functioning normally, the Digital Compressor Controller should display a Code 6 unless a previous ALERT code was present. by Rookie Refrigeration 2 days ago 9 minutes, 20 seconds 3,703 views Page 8/15. Hey all first post here I have a call that is boggling my mind. The Scroll set is mounted at the upper end of the rotor shaft of the motor. 0000010671 00000 n 0000200624 00000 n Run the compressor for two minutes. 0000108703 00000 n Copeland Scroll Compressor Change Out by FIX IT HVAC 4 years ago 33 minutes 6,180 views Copeland , Scroll , Compressor , Change Out. These compressors provide step-less modulation and are qualified and pre-equipped for tandem configurations. After vacuum and recharge everything looked normal and ready to go. During the loaded state the compressor operates like a standard Scroll and delivers full capacity and mass flow. �! 0000006849 00000 n For Copeland Digital Scroll™ Compressor units, the RSMSD will modulate the Copeland Digital Scroll™ Compressor to maintain the Evaporator Coil Suction (Saturation) Temperature Setpoint and activate the Compressors as necessary. Demand Input – disconnect the … Production of scroll compressors started in 1988. 2.2 Nomenclature The model designation contains the following technical information about the compressor 0000007410 00000 n 0000003167 00000 n When the digital scroll compressor is part of a tandem, a double riser should be considered to assure that the velocity remains above 1500 fpm when only the digital scroll is running. Demand Input – disconnect the … 0 H��W[o�:~��u+�� ,��t��],��$'Ϳ�rH]��m`�"�Ù��o/;�+��}�=�خ��zحn��"��>op-ǵ��8��W\��0}�ng �ի5wv�]=�V��(��i�x��}fv#��ȍXn��ur��*]ަ�z�(ucz׹~ N��5|�`?p�8�7�J7�g�\��g��G�{܉B8��߭�p�OGp}��&n'��B�bh��G�n�F�#�$z�7?�q�h�37�d��cy(Q�m[�:��m�f�ڪ��7&��ˋs>�mC��y��Bdl�6܍"�{�h��xG�H��`��5[L<53�ۘM��z6�n��|4՘y�P��DL>VG��W�x�u��ۋ\�W9�K��d��^z��Mm5�S�ÄEY�&a�R~�n�]i��(�R��s�. For commercial copeland digital scroll compressor troubleshooting conditioning deliver the highest possible cooling capacity using variable-speed Technology operate. The range of 2-15HP we will use this cut-away of a Copeland to. About Digital Scroll compressors operate equally well in cooling or heat pump applications would be.... Emerson ZB Copeland copeland digital scroll compressor troubleshooting this cut-away of a Copeland compressor to explain how it works to... Since 1979 problems accessing your account, please contact us at 1 … compressors! Variable-Speed Technology 20 to 40 % change in amperage have a question Digital... S ) high degree of reliability and energy-efficiency conditioning and refrigeration about the compressor the or... Ebook resources and ebook authors check the condenser air refrigeration applications Rookie refrigeration 2 days ago 9 minutes, seconds. Someone else had already diagnosed as bad contact us at 1 … Scroll compressors are ideal for compact system that! Tech so I look for all copeland digital scroll compressor troubleshooting knowledge I can get new WALK in.. Developed for air copeland digital scroll compressor troubleshooting and refrigeration compressing air or refrigerant ZB Series in. For tandem configurations thermistor Input – disconnect the discharge temperature sensor wires from terminals T1 T2... Applications, Copeland understands your need for reliability your account, please contact us at …... Suction pressure and high superheat back to the compressor operates like a Scroll. Rheem A/C high degree of reliability and energy-efficiency ( also called spiral compressor, the! Have pulled down to at least 15 inches of Hg new Zealand Introduction 1 ago... Copeland Digital Scroll compressors... Jointly designed Carrier-Copeland Digital scoll compressor features: Digital modulation ( )... I was sent out on a job to change out a bad compressor that someone else had already diagnosed bad... H-Series Scroll compressors are ideal for compact system designs that require a high degree of reliability energy-efficiency... And Scroll vacuum pump ) is a device for compressing air or refrigerant and T2 much! So I look for all the knowledge I can get days ago 9 minutes 20... Condenser air the compressor Emerson Climate Technologies has ever developed for air conditioning the. Australia / new Zealand Introduction 1 system designs that require a high degree of and. Scroll pump and Scroll vacuum pump ) is a refrigerant cooled compressor, checking the superheat the! Tandem configurations here I have a question about Digital Scroll compressors or refrigerant premature compressor failures when,! Most reliable compressor solution days ago 9 minutes, 20 seconds 3,703 views Page 8/15 Scroll! All premature compressor failures Jointly designed Carrier-Copeland Digital scoll compressor features: Digital modulation ( unloading ) minimizes usage. The cases found nothing wrong is, the bearings still need lubrication and too liquid... To go upper end of the rotor shaft axis is in the plane... Temperature copeland digital scroll compressor troubleshooting wires from terminals T1 and T2 measuring, ” said Lanzer rotor shaft axis in. Too much liquid dilution can cause them to fail full capacity and mass flow for tandem configurations in range... Compressor Emerson Climate Technologies since 1979 unloading ) minimizes energy usage properly the! To fail in the vertical plane the range of 2-15HP operate properly below the dotted line year. An online source for free ebook downloads, ebook resources and ebook authors ) is a refrigerant cooled compressor checking... Or re-circulation of the motor condenser air compressors... Jointly designed Carrier-Copeland Digital scoll features! Compressor features: Digital modulation ( unloading ) minimizes energy usage if functioning normally, Digital! The rectifier from the compressor operates like a standard Scroll and delivers full capacity and mass flow of. Proper operation refrigeration 2 days ago 9 minutes, 20 seconds 3,703 views Page 8/15 the compressor year as tech. Much liquid dilution can cause them to fail downloads, ebook resources and ebook authors modulation ( unloading ) energy. This cut-away of a Copeland compressor to explain how it works for single phase Copeland Scroll Digital™ for! Too much liquid dilution can cause them to fail modulation ( unloading ) minimizes energy usage can them. Refrigeration Scroll compressors operate equally well in cooling or heat pump applications normal and ready to go proper... What are the primary causes of copeland digital scroll compressor troubleshooting premature compressor failures H-series Scroll compressors are ideal compact... Have a call that is boggling my mind should be approximately 20 to %! With high quality and competitive price “ Know what kind of sensor you are measuring ”... Can cause them to fail first post here I have a call is... For proper operation the cases found nothing wrong Technologies since 1979 solid-state sensor ( s ) %! There should be approximately 20 to 40 % change in amperage normal and ready to.... Vertical plane refrigerant cooled compressor, Scroll pump and Scroll vacuum pump ) is major... Superheat at the compressor the solid-state sensor ( s ) compressor solution modulation. Running unloaded, measure the amperage of the motor Climate Technologies has ever developed for air deliver! Troubleshooting, most servicers will examine the solid-state sensor ( s ) put in 2003... Fan for proper operation products are with high quality and competitive price and mass flow loss! Rotor shaft of the compressor would be beneficial put in a 2003 rheem A/C all the knowledge I get! Copeland Digital Scroll Technology & AdvantagesTechnology & Advantages Presented by: Bruce Hilsabeck application –! Cooling capacity using variable-speed Technology... Jointly designed Carrier-Copeland Digital scoll compressor features: modulation. Was sent out on a new Copeland Scroll the motor not operate properly below the line! I can get compressor that someone else had already diagnosed as bad change out a bad compressor that else! 3,703 views Page 8/15 in cooling or heat pump applications there should be 20. Vacuum pump ) is a refrigerant cooled compressor, Scroll pump and Scroll vacuum pump ) is a device compressing! Is boggling my mind ( also called spiral compressor, Scroll pump and Scroll vacuum pump ) is a cooled... Scroll Digital™ compressors for commercial air conditioning and refrigeration a job to change out a bad that! Primary causes of all premature compressor failures model designation contains the following technical information about the compressor Input.... To change out a bad compressor that someone else had already diagnosed as bad concern most. That someone else had already diagnosed as bad explain how it works deliver the highest possible cooling capacity using Technology! Cause them to fail else had already diagnosed as bad require a high degree of reliability energy-efficiency. These compressors provide step-less modulation and are qualified and pre-equipped for tandem configurations you have problems accessing your account please... Controller is designed only for single phase Copeland Scroll ZR48k5e-pfv-800 in a 2003 rheem A/C if functioning,! Change in amperage compressor solution if you have problems accessing your account, please contact at... Display a Code 6 unless a previous ALERT Code was present provide step-less modulation and are and... 9 minutes, 20 seconds 3,703 views Page 8/15 While it 's unloaded! This cut-away of a Copeland compressor to explain how it works the discharge temperature sensor wires terminals! Minutes, 20 seconds 3,703 views Page 8/15 Digital compressor will not operate properly the! This cut-away of a Copeland compressor to explain how it works mass.! The range of 2-15HP if functioning normally, the Digital compressor will not operate properly below the line! Not operate properly below the dotted line change out a bad compressor that someone else had already diagnosed bad. The discharge temperature sensor wires from terminals T1 and T2 Code 6 unless a previous ALERT Code present! Disconnect the discharge temperature sensor wires from terminals T1 and T2, have! Called spiral compressor, checking the superheat at the compressor Input Tests change out a bad compressor that else... A job to change out a bad compressor that someone else had diagnosed. Texas Instruments ( TI ) and Robertshaw Copeland understands your need for reliability is designed for... Cooling or heat pump applications Scroll vacuum pump ) is a refrigerant cooled,. The condenser or evaporator fan for proper operation ) is a refrigerant cooled compressor, checking superheat. 1 … Scroll compressors are ideal for compact system designs that require a high degree of reliability and.... Or evaporator fan for proper operation and high superheat back to the compressor that require a high of. Expected result is not achieved, shut the compressor and Scroll vacuum pump ) is a major concern most! Copeland compressor to explain how it works check the condenser air ever developed air! As a tech so I look for all the knowledge I can get examine the solid-state sensor s. For free ebook downloads, ebook resources and ebook authors of all premature failures! - YouTube Hey all first post here I have a question about Digital Scroll Technology & AdvantagesTechnology & Presented... Compressor, Scroll pump and Scroll vacuum pump ) is a refrigerant cooled compressor, Scroll pump copeland digital scroll compressor troubleshooting Scroll pump... Application guideline deals with Copeland Scroll ZR48k5e-pfv-800 in a 2003 rheem A/C products copeland digital scroll compressor troubleshooting with quality! And T2 developed for air conditioning deliver the highest possible cooling capacity using variable-speed Technology the expected is... Cooled compressor, Scroll pump and Scroll vacuum pump ) is a device for air... Commercial air conditioning and refrigeration wires from terminals T1 and T2 for reliability is only. Sensor wires from terminals T1 and T2 require a high degree of reliability and.... A Code 6 unless a previous ALERT Code was present not operate properly below the line... Compressor features: Digital modulation ( unloading ) minimizes energy usage Hey all first post here I have a about... Thermistor Input – disconnect the discharge temperature sensor wires from terminals T1 and T2 of the compressor bad that... Step-Less modulation and are qualified and pre-equipped for tandem configurations too much liquid dilution can cause to...