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INSTALLATION MANUAL
AIR CONDITIONER
• Please read this installation manual completely before installing the product.
• Installation work must be performed in accordance with the national wiring
standards by authorized personnel only.
• Please retain this installation manual for future reference after reading it
thoroughly.
TYPE :
(Air-to-Water Heat Pump)
MODEL : AHBW***A0
AHBW***H0
P/NO : MFL62567801
www.lg.com
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Table of Contents
Troubleshooting
Related Manuals for LG AHBW Series
Summary of Contents for LG AHBW Series
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Page 1: Installation Manual
• Installation work must be performed in accordance with the national wiring standards by authorized personnel only. • Please retain this installation manual for future reference after reading it thoroughly. TYPE : (Air-to-Water Heat Pump) MODEL : AHBW***A0 AHBW***H0 www.lg.com P/NO : MFL62567801... -
Page 2: Table Of Contents
INSTALLATION ........................7 OPERATION..........................7 2. GENERAL INFORMATION ....................8 MODEL INFORMATION........................8 MODEL NAME AND RELATED INFORMATION..............8 ACCESSORIES ..........................9 ACCESSORIES SUPPORTED BY LG ELECTRONICS ............9 ACCESSORIES SUPPORTED BY 3rd PARTY COMPANIES ..........9 TYPICAL INSTALLATION EXAMPLE ..................10 CASE 1..........................10 CASE 2 ..........................11 CASE 3..........................12 CYCLE DIAGRAM ........................13... - Page 3 4. WIRING AND WATER PIPING FOR UNIT .................35 ELECTRICAL WIRING........................35 WIRE SPECIFICATION......................35 GENERAL CONSIDERATION ....................36 WIRING PROCEDURE FOR POWER CABLE ..............36 TERMINAL BLOCK INFORMATION ..................37 CIRCUIT BREAKER SPECIFICATION ................39 WATER PIPING AND WATER CIRCUIT CONNECTION............40 GENERAL CONSIDERATIONS ...................40 WATER PIPING AND WATER CIRCUIT CONNECTION .............40 5.
- Page 4 TROUBLESHOOTING FOR PROBLEM WHILE OPERATION ..........77 TROUBLESHOOTING FOR ERROR CODE ................78 REMARK : ALL CONTENTS OF THIS MANUAL ARE SUBJECT TO CHANGE WITHOUT NOTICE. TO GET THE LATEST INFORMATION, PLEASE VISIT LG ELECTRONICS WEB SITE. www.lgservice.com 4 Air-to-Water Heat Pump...
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Page 5: Safety Precaution
Safety Precautions 1. Safety Precautions To prevent injury to the user or other people and property damage, the following instructions must be followed. n Be sure to read before installing the unit. n Be sure to observe the cautions specified here as they include important items related to safety. n Incorrect operation due to ignoring instruction will cause harm or damage. -
Page 6: Operation
Safety Precautions For installation, always Do not install the unit on a Be sure the installation area contact the dealer or an defective installation stand. does not deteriorate with Authorized service center. age. • There is risk of fire, electric •... -
Page 7: Installation
Safety Precautions For installation, always If the unit is not used for long contact the dealer or an time, we strongly recommend authorized service center. not to switch off the power supply to the unit. • There is risk of fire, electric shock, •... -
Page 8: General Information
General Information 2. General Information With advanced inverter technology, is suitable for applications like under floor heating, under floor cooling, and hot water generation. By Interfacing to various accessories user can customize the range of the application. In this chapter, general information of is presented to identify the installation procedure. -
Page 9: Accessories
, there are various external auxiliary apparatus called as “accessories”. They are classified by "accessories" and "3rd party accessories" according to the manufacturer. Accessories are presented LG Electronics, and 3rd party accessories are presented by related manufacturers. Accessories supported by LG Electronics... -
Page 10: Typical Installation Example
General Information Typical Installation Example If is installed with pre-existing boiler, the boiler and should not be operated together. If entering water temperature of is above 55 °C, the system will stop operation to prevent mechanical damage of the unit. For detailed electric wiring and water piping, please contact authorized installer. - Page 11 General Information CASE 2: Connecting sanitary water tank Outdoor Indoor Fan coil unit Floor heating loop Radiator Hot water Sanitary water tank City water Note: • Electric heater - Type of electric heater and specification should be complied with chapter 6 of installation manual.
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Page 12: Case
General Information CASE 3 : Connecting heat emitters for heating (Under floor loop, Fan coil unit, and Radiator) Outdoor Indoor Floor heating loop Radiator Hot water Sanitary water tank City water Note: • 3way valve - Type of 3way valve and specification should be complied with chapter 6 of installation manual. -
Page 13: Cycle Diagram
High Pressure Sensor Water Pump [Accumulator] [PHE] ❈ EXP/Tank, E/Heater, Strainer, F/Switch are <Inside of Monobloc Product> not provided in product <LG Supply> <Field Installation> Remote Room Shower Temperature Sensor (accessory) B / HT W / TANK Th11 Solar panel... - Page 14 Electric Pressure Heater & Gage Tank Th10 W/Pump [Accumulator] Strainer [PHE] <Inside of Monobloc Product> <LG Supply> <Field Installation> Remote Room Shower Temperature Sensor (accessory) W/Tank B / HT Th11 Solar panel 3WAY V / V_2 Th13 Solar therm...
- Page 15 General Information Description (AHBW***A0) Category Symbol Meaning Remarks Connector Inlet evaporator temperature CN_PIPE/IN sensor - Discription is expressed based on cooling mode Outlet evaporator temperature CN_PIPE/OUT sensor Compressor suction pipe temperature sensor - Th4 and Th5 are connected at 4 CN_TH2 pin type connector CN_TH2 Compressor discharge pipe...
- Page 16 RMAL installation (sold separately) - To utilized hot water heated SYSTEM by SOLAR THERMAL SYSTEM, end-user must by LG AWHP Solar-Kit. Water to be heated by unit City Water (no connector) - Field installation and B/HT of W/TANK Shower Water supplied to end-user...
- Page 17 General Information Description (AHBW036H0) Category Symbol Meaning Remarks Connector Inlet evaporator temperature CN_PIPE/IN sensor - Discription is expressed based on cooling mode Outlet evaporator temperature CN_PIPE/OUT sensor Compressor suction pipe temperature sensor - Th4 and Th5 are connected at 4 CN_TH2 pin type connector CN_TH2 Compressor discharge pipe...
- Page 18 SOLAR Thermostats, Interim heat - 3rd party accessory and Field THERMAL exchanger, Water pump,etc. (no connector) installation (sold separately) SYSTEM - To utilized hot water heated by SOLAR THERMAL SYSTEM, end-user must by LG AWHP Solar-Kit. 18 Air-to-Water Heat Pump...
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Page 19: Parts And Dimensions
General Information Parts and Dimensions UN3 chassis Description Name Remarks Entering water pipe PT 25.4mm(Female type) Leaving water pipe PT 25.4mm(Female type) Strainer Filtering and stacking particles inside circulating water Top cover Control box PCB and terminal blocks Plate heat exchanger Heat exchange between refrigerant and water Water pump Pressure gage... - Page 20 General Information UN4 chassis Description Name Remarks Entering water pipe PT 25.4mm(Female type) Leaving water pipe PT 25.4mm(Female type) Strainer Filtering and stacking particles inside circulating water Top cover Control box PCB and terminal blocks Plate heat exchanger Heat exchange between refrigerant and water Water pump Pressure gage Indicates circulating water pressure...
- Page 21 General Information U4 chassis Description Name Remarks Entering water pipe PT 25.4 mm (Male type) Leaving water pipe PT 25.4 mm (Male type) Top cover Control box PCB and terminal blocks Plate heat exchanger Heat exchange between refrigerant and water Water pump Compressor Installation Manual 21...
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Page 22: Control Parts
General Information Control Parts Control box UN4 chassis Description Name Remarks Main PCB assembly 1 This PCB controls the functioning of the unit Main PCB assembly 2 This PCB controls the cycle parts of the unit Terminal block The terminal blocks allow easy connection of field wiring Cord clamp 22 Air-to-Water Heat Pump... - Page 23 General Information UN3 chassis Description Name Remarks Main PCB assembly 1 This PCB controls the functioning of the unit Main PCB assembly 2 This PCB controls the cycle parts of the unit Terminal block The terminal blocks allow easy connection of field wiring Cord clamp Installation Manual 23...
- Page 24 General Information U4 chassis(AHBW036H0) Description Name Remarks Main PCB assembly 1 This PCB controls the functioning of the unit Main PCB assembly 2 This PCB controls the cycle parts of the unit Terminal block The terminal blocks allow easy connection of field wiring Cord clamp 24 Air-to-Water Heat Pump...
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Page 25: Remote Controller
General Information Remote controller Name Display Change Temperature Button Water Heating Enable / Disable Button Power Button Operation Mode Selection Button Temperature Setting Mode Button Temperature View Mode Button Function Setting Button Programming Button Direction Button (Up, Down, Left, Right) Set / Clear button ESC Button h Grey painted functions may not be operated and displayed. -
Page 26: Wiring Diagram (Incl. Field Wiring)
General Information Wiring Diagram : Including Field Wiring (AHBW0*6A0) 26 Air-to-Water Heat Pump... - Page 27 General Information Wiring Diagram : Including Field Wiring (AHBW1*6A0) Installation Manual 27...
- Page 28 General Information Wiring Diagram : Including Field Wiring (AHBW**8A0) 28 Air-to-Water Heat Pump...
- Page 29 General Information Wiring Diagram : Including Field Wiring (AHBW036H0) Installation Manual 29...
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Page 30: Installation Of Unit
Installation of Unit 3. Installation of Unit is installed outside to exchange heat with ambient air. Therefore, it is important to secure proper space around the unit and care for specific external conditions. This chapter presents a guide to install the unit and what to do when installed around seaside. Installation Conditions General considerations •... -
Page 31: Water Volume And Pump Capacity
Installation of Unit Water volume and pump capacity The water pump is three speed-adjustable (Maximum / Medium / Minimum), so it may be required to change default water pump speed in case of noise by water flow. In most case, however, it is strongly recommended to set speed as Maximum. -
Page 32: Water Quality
Installation of Unit Water quality Water quality should be complied with EN 98/83 EC Directives. Requirement for resolved chemical ingredients is following table. Detailed water quality condition can be found in EN 98/83 EC Directives. Parameter Value Parameter Value Acrylamide 0.10 μg/ Fluoride 1.5 mg/... -
Page 33: Remote Controller
Installation of Unit Remote controller 1. Please fix tightly using provided screw after placing remote controller setup board on the place where you like to setup. - Please set it up not to bend because poor setup could take place if setup board bends. Please set up remote controller board fit to the reclamation box if there is a reclamation box. - Page 34 Installation of Unit 4. Please connect PCB assembly 1 and remote controller using connection cable. Please check if connector is normally connected. PCB assembly 1 of unit side Connecting cable 5. Please use extension cable if the distance between wired remote controller and unit is more than 10m.
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Page 35: Wired Remote Controller Installation
Installation of Unit Wired Remote Controller Installation • Since the room temperature sensor is in the remote controller, the remote controller box should be installed in a place away from direct sunlight, high humidity and direct supply of cold air to maintain proper space temperature. Install the remote controller about 1.5 m above the floor in an area with good air circulation at an average temperature. -
Page 36: Installation At Seaside
3) Select a well-drained place. 1. If you can’t meet above guide line in the seaside installation, please contact LG Electronics for the additional anticorrosion treatment. 2. Periodic ( more than once/year ) cleaning of the dust or salt particles stuck on the heat exchanger by using water Seasonal Wind and Cautions in Winter •... -
Page 37: Wiring And Water Piping For Unit
Wiring and Water Piping for Unit 4. Wiring and Water Piping for Unit Procedures about water piping and electric wiring are described in this chapter. Water piping and water circuit connection, water charging, pipe insulations will be shown for water piping procedures. Accessories connection, such as electric heater, sanitary water tank, thermostat, 3way or 2way valves, etc will be dealt in separated chapter. -
Page 38: General Consideration
Wiring and Water Piping for Unit General consideration Followings should be considered before beginning unit wiring. • Field-supplied electrical components such as power switches, circuit breakers, wires, terminal boxes, etc should be properly chosen with compliance with national electrical legislation or regulation. -
Page 39: Terminal Block Information
Wiring and Water Piping for Unit Terminal block information Model : AHBW**6A0 Symbols used below pictures are as follows : AHBW**8A0 - L, L1, L2 : Live (1~ 230 V) - N : Neutral (1~ 230 V) - BR : Brown , WH : White , BL : Blue , BK : Black, GR/YL : Green/Yellow Terminal block 1 water flow switching between energizing water... -
Page 40: Terminal Block
Wiring and Water Piping for Unit Symbols used below pictures are as follows : Model : AHBW036H0 - L, L1, L2 : Live (1~ 230 V) - N : Neutral (1~ 230 V) - BR : Brown , WH : White , BL : Blue , BK : Black, GR/YL : Green/Yellow Terminal block 1 energizing water water flow switching between... -
Page 41: Circuit Breaker Specification
Wiring and Water Piping for Unit Circuit breaker specification • Select a power source that is capable of supplying the current required by the unit. • Use a recognized circuit breaker between the power source and the unit. A disconnection device to adequately disconnect all supply lines must be fitted. •... -
Page 42: Water Piping And Water Circuit Connection
Wiring and Water Piping for Unit Water Piping and Water Circuit Connection General considerations Followings are should be considered before beginning water circuit connection. • Service space should be secured. • Water pipes and connections should be cleaned using water. •... - Page 43 Wiring and Water Piping for Unit Water condensation on the floor While cooling operation, it is very important to keep leaving water temperature higher than 16 ℃. Otherwise, dew condensation can be occurred on the floor. If floor is in humid environment, do not set leaving water temperature below 18 °C. Water condensation on the radiator While cooling operation, cold water may not flow to the radiator.
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Page 44: Accessories Installation
See the chapter 7 for a dip-switch settings and installer settings. For accessories supported by LG Electronics, please refer to installation manual of each accessories. Followings should be kept before installation • Main power must be turned off during installing 3rd party accessories. -
Page 45: Thermostat
Accessories Installation Thermostat Thermostat is generally used to control the unit by air temperature. When thermostat is connected to the unit, the unit operation is controlled by the thermostat. Installation condition 1. Some electro-mechanical type thermostat has internal delay time to protect compressor. In that case, mode change can takes time more than user's expectation. -
Page 46: General Information
Accessories Installation General information supports following thermostats. Type Power Operating Mode Supported Heating Only (3) Mechanical 1 Ø 230 V Heating / Cooling (4) Heating Only (3) Electrical 1 Ø 230 V Heating / Cooling (4) (1) There is no electric circuit inside the thermostat and electric power supply to the thermostat is not required. -
Page 47: How To Wire Thermostat
Accessories Installation How to wire thermostat Follow below procedures Step 1 ~ Step 5. Step 1. Uncover front cover of the unit and open the control box. Step 2. Identify the power specification of the thermostat. If it is 1 Ø ~ 230 V, go to Step 4. First: Disconnect A and C... -
Page 48: Final Check
Accessories Installation Step 5. Find terminal block and connect wire as below. THERMOSTAT (Default : 1~ 230 V) Mechanical type thermostat Do not connect wire (N) as mechanical type thermostat does not require electric power supply. Do not connect external electric loads. Wire (L) and (N) should be used only for operation Electric type thermostat. - Page 49 Accessories Installation Thermostat operation with remote controller Following features are permitted when thermostat is installed : • SET TEMP button • VIEW TEMP button • Temperature adjust button (*) • Sanitary water heating Enable / Disable • Silent operation On / Off (*) : Adjusted temperature is only used to control electric heater on / off condition.
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Page 50: Sanitary Water Tank And Sanitary Water Tank Kit
Accessories Installation Sanitary Water Tank and Sanitary Water Tank Kit To establish sanitary water circuit, 3way valve and sanitary water tank kit is required. If solar thermal system is pre-installed at the installation field, solar thermal kit is required to interface solar thermal system - to - sanitary water tank - to - Installation condition Installing sanitary water tank requires following considerations :... - Page 51 Accessories Installation Installing recirculation pump When is used with sanitary water tank, it is STRONGLY recommended to install recirculation pump to prevent flooding out cold water at the end of hot water supply and to stabilize the water temperature inside the sanitary water tank.
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Page 52: How To Install Sanitary Water Tank
Accessories Installation How to install sanitary water tank For more detail information about installing sanitary water tank, please refer installation manual provided with sanitary water tank. PHS02060310(LGRTV200E)PHS020K0310(LG2RTV200) PHS02060320(LGRTV200VE) / PHS03060320(LGRTV300VE) (unit : mm) 52 Air-to-Water Heat Pump... -
Page 53: How To Install Sanitary Water Tank Kit
Accessories Installation How to install sanitary water tank kit Follow below procedures Step 1 ~ Step 5. Step 1. Uncover the water tank kit and locate it on the wall. Step 2. Connect the water tank kit to the main power like the below figure 2. Step 3. -
Page 54: Dry Contact
Accessories Installation Dry Contact LG Dry Contact is a solution for automatic control of air conditioning system at the owner's behest. In simple words, it's a switch which can be used to turn the unit On/Off after getting the signal from external sources like key-in lock, door or window switch etc specially used in Hotel rooms. -
Page 55: Remote Temperature Sensor
Accessories Installation Remote Temperature Sensor Remote temperature sensor can be installed any place a user wants to detect the temperature. How to Install Remote Temperature Sensor Step 1. After deciding where the remote temperature sensor is installed, decide the location and height of the fixing screws. -
Page 56: 3Way Valve
Accessories Installation 3Way Valve 3way valve is required to operate sanitary water tank. Role of 3way valve is flow switching between under floor heating loop and water tank heating loop. General information supports following 3way valve. Type Power Operating Mode Supported SPDT 1 Ø... -
Page 57: Final Check
Accessories Installation Final check • Flow direction : - Water should flow from water outlet of the unit to sanitary tank water inlet when sanitary tank heating is selected. - To verify the flow direction, check temperature at the water outlet of the unit and water inlet of sanitary water tank. -
Page 58: Water Volume And Expansion Vessel Pressure
Accessories Installation Water Volume and Expansion Vessel Pressure Expansion vessel should be installed in the water circuit to protect components from water pressure. - Minimum total water volume is 20 liter. (In special case, extra water volume might be required.) - Pre-pressure is adjusted by the total water volume. -
Page 59: System Set-Up
System Set-Up 6. System Set-Up is designed to satisfy various installation environment, it is important to set up system correctly. If not configured correctly, improper operation or degrade of performance can be expected. DIP Switch Setting Turn off electric power supply before setting DIP switch. •... -
Page 60: Dip Switch Information
System Set-Up DIP switch information Description Setting Default As master Role when central controller is equipped. As slave Unit only Unit + Sanitary water tank Accessory installation is installed. information. Unit + Sanitary water tank + Solar thermal system is installed. High temperature cycl.e Emergency operation Level. - Page 61 System Set-Up Emergency operation • Definition of terms - Trouble : a problem which can stop system operation, and can be resumed temporally under limited operation without certificated professional's assist. - Error : problem which can stop system operation, and can be resumed ONLY after certificated professional's check.
- Page 62 System Set-Up • Following features are permitted in emergency operation : Operation On/Off VIEW TEMP button(*) Temperature adjust button (*) Sanitary water heating button (*) : Temperature measured by failed sensor is displayed as ʻ- -ʼ. (*) : Adjusted temperature is only used to control electric heater on / off condition. The unit does not turn on / off according to the setting temperature at the remote controller.
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Page 63: Installer Setting
System Set-Up Installer Setting How to enter installer setting mode Installer setting mode is to set the detail function of the remote controller. If the installer setting mode is not set correctly, it could cause problems to the unit, user injury or property damage. -
Page 64: Summary
System Set-Up Summary Example of function code display Function Code Value #1 Value #2 Code Item Detail Remark Function Test run Description Instant cooling operation for charging additional refrigerant Value #1 Note Default Range Value #2 Note Default Range Function Disable 3 minute delay Description Factory use only... - Page 65 System Set-Up Code Item Detail Remark Function Setting temperature selection Description Selection for setting temperature as air temperature or leaving water temperature. Value #1 Note 01:Air temperature 02:Leaving water temperature Air temperature as setting temperature is ONLY available when remote air sensor. Connection is enabled and Function code 03 is set as 02.
- Page 66 System Set-Up Code Item Detail Remark Value #2 Note Lower limit of setting range(FCU is not equipped) Default 16 °C 'Setting Air Range 16 ~ 18 °C Temperature' is Function Setting air temperature in heating mode used when user Description Adjusting range of 'Setting Air Temperature' in heating mode wants to set target temperature by...
- Page 67 System Set-Up Code Item Detail Remark Function Setting electric heater on / off temperature DIP switch No.6 = Off No.6 = Off setting No.7 = On No.7 = Off Description Setting for using Step 1 capacity Setting for using Step 2 capacity of electric heater of electric heater Value #1 Note...
- Page 68 System Set-Up Code Item Detail Remark Function Setting leaving water temperature range for weather-dependent operation Description Setting leaving water max / min temperature fo r weather-dependent operation Value #1 Note Upper limit of setting range Default 55 °C Range 35 ~ 57 °C Value #2 Note Lower limit of setting range Default...
- Page 69 System Set-Up Code Item Detail Remark Function Miscellaneous setting Description Determine electric heater and water heater on and off Value #1 Note 00: Operate both electric heater and sanitary tank heater 01: Operate only sanitary tank heater Default Range 00 ~ 01 Value #2 Note Not used Default...
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Page 70: Common Setting
System Set-Up Common setting • Function Code 01 : Test run Test run should be performed when additional refrigerant charging is required. To charge the refrigerant, the unit must run in cooling mode. Test run instantly makes the unit working in cooling mode for 18 minutes. -
Page 71: Temperature Range Setting
System Set-Up Temperature range setting • Function Code 11 : Setting air temperature in cooling mode Determine cooling setting temperature range when air temperature is selected as setting temperature. Only available when remote air temperature sensor is connected. • Accessory PQRSTA0 should be installed. •... -
Page 72: Temperature Control Parameter Setting And Etc
System Set-Up Temperature control parameter setting and etc • Function Code 21 : Setting electric heater On / Off temperature Using Step 1 capacity of electric heater : when DIP switch No. 6 and 7 is set as ʻOFF-ONʼ : - Value #1 : outdoor air temperature where Step 1 capacity of electric heater starts operation. - Page 73 System Set-Up • Function Code 23, 24, and 25 : Setting weather-dependent operation Weather-dependent operation is that the unit automatically adjusts target temperature (leaving water or room air) according to the outdoor air temperature. - Value #1 and Value #2 of Function Code 23 : range of outdoor air temperature - Value #1 and Value #2 of Function Code 24 : range of auto-adjustable target room air temperature - Value #1 and Value #2 of Function Code 25 : range of auto-adjustable target leaving water temperature...
- Page 74 System Set-Up • Function Code 26 and 27 : Setting disinfection operation Disinfection operation is special sanitary tank operation mode to kill and to prevent growth of viruses inside the tank. - Value #1 of Function Code 26 : Selecting enable or disable of disinfection operation. ʼ00ʼ for disable, and ʼ01ʼ...
- Page 75 System Set-Up • Function Code 28 and 29 : Setting control parameter for sanity water heating operation Descriptions for each parameters are as following. - Value #1 of Function Code 28 : temperature gap from Value #2 of Function Code 28. - Value #2 of Function Code 28 : maximum temperature generated by AWHP compressor cycle.
- Page 76 System Set-Up • Function Code 2A : Miscellaneous setting - Value #1 of Function Code 2A : determine electric heater and sanitary tank heater on and off. - Value #2 of Function Code 2A : not used. - Example : If Value #1 is set as ʻ0ʼ, then electric heater and sanitary tank heater are on and off according to control logic.
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Page 77: Check Points, Maintenance And Troubleshooting
• There should be no apparently damaged parts inside the unit. • Refrigerant leakage degrades the performance. If leakage found, Refrigerant leakage contact qualified LG air conditioning installation person. Unit Installation • While cooling operation, condensed dew can drop down to the bottom of the unit. -
Page 78: Maintenance
Check Points, Maintenance and Troubleshooting Maintenance To assure best performance of , it is required to perform periodical check and maintenance. It is recommended to proceed following check list for once a year. Turn off the power before proceeding maintenance Category Item Check Point... -
Page 79: Troubleshooting
Check Points, Maintenance and Troubleshooting Troubleshooting operates not properly or it does not start operation, please check following list. Turn off the power before proceeding troubleshooting. Troubleshooting for problem while operation Problem Reason Solution • Set target temperature correctly. • Setting target temperature •... -
Page 80: Troubleshooting For Error Code
Check Points, Maintenance and Troubleshooting Troubleshooting for Error Code Code Description Cause Normal Condition Problem in remote room air sensor • Resistance: 10 kΩ at 25 centigrade (unplugged) → for Problem in refrigerant (inlet side) sensor Remote room air sensor •...