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Maintenance and service

Installer reference guide

E120B

R32 Split series – Domestic hot water tank

4P680077-1A – 2022.11

13 Maintenance and service

NOTICE

General maintenance/inspection checklist.

Next to the maintenance instructions in

this chapter, a general maintenance/inspection checklist is also available on the
Daikin Business Portal (authentication required).

The general maintenance/inspection checklist is complementary to the instructions
in this chapter and can be used as a guideline and reporting template during
maintenance.

NOTICE

Maintenance MUST be done by an authorised installer or service agent.

We recommend performing maintenance at least once a year. However, applicable
legislation might require shorter maintenance intervals.

NOTICE

Applicable legislation on

fluorinated greenhouse gases

requires that the refrigerant

charge of the unit is indicated both in weight and CO

equivalent.

Formula to calculate the quantity in CO

equivalent tonnes:

GWP value of the

refrigerant × total refrigerant charge [in kg] / 1000

In this chapter

13.1

Maintenance safety precautions............................................................................................................................................

13.2

Yearly maintenance ................................................................................................................................................................

13.2.1

Yearly maintenance indoor unit: overview............................................................................................................

13.2.2

Yearly maintenance indoor unit: instructions .......................................................................................................

13.3

To drain the domestic hot water tank ................................................................................................................................... 100

13.1 Maintenance safety precautions

DANGER: RISK OF ELECTROCUTION

DANGER: RISK OF BURNING/SCALDING

NOTICE: Risk of electrostatic discharge

Before performing any maintenance or service work, touch a metal part of the unit in
order to eliminate static electricity and to protect the PCB.

13.2 Yearly maintenance

13.2.1 Yearly maintenance indoor unit: overview

▪

Pressure relief valve of the domestic hot water tank

▪

Switch box

▪

Booster heater of the domestic hot water tank

Содержание EKHWET-BV3

Страница 1: ...Installer reference guide R32 Split series Domestic hot water tank EKHWET90B V3 EKHWET120B V3 1 2 3 9 A B C Z 1 2 3 9 https daikintechnicaldatahub eu...

Страница 2: ...25 6 3 1 Permanent power limitation 26 6 3 2 Power limitation process 26 7 Unit installation 28 7 1 Preparing the installation site 28 7 1 1 Installation site requirements of the indoor unit 28 7 1 2...

Страница 3: ...nformation 81 10 6 5 Installer settings 82 10 6 6 Commissioning 87 10 6 7 User profile 88 10 6 8 Operation 88 10 6 9 WLAN 88 10 7 Menu structure Overview user settings 91 10 8 Menu structure Overview...

Страница 4: ...Table of contents Installer reference guide 4 EKHWET90 120B R32 Split series Domestic hot water tank 4P680077 1A 2022 11 16 Glossary 112 17 Field settings table 113...

Страница 5: ...ion manual Outdoor unit Installation instructions Format Paper in the box of the outdoor unit Installation manual Indoor unit Installation instructions Format Paper in the box of the indoor unit Insta...

Страница 6: ...and Android devices using the QR codes below Registration to the Stand By Me platform is required to access the app App Store Google Play 1 1 Meaning of warnings and symbols DANGER Indicates a situati...

Страница 7: ...3 Table title means Table 3 in chapter 1 1 2 Installer reference guide at a glance Chapter Description About the documentation What documentation exists for the installer General safety precautions S...

Страница 8: ...d know to commission the system after it is configured Hand over to the user What to give and explain to the user Maintenance and service How to maintain and service the units Troubleshooting What to...

Страница 9: ...NING Improper installation or attachment of equipment or accessories could result in electrical shock short circuit leaks fire or other damage to the equipment ONLY use accessories optional equipment...

Страница 10: ...nit in the following places In potentially explosive atmospheres In places where there is machinery that emits electromagnetic waves Electromagnetic waves may disturb the control system and cause malf...

Страница 11: ...e than the specified amount of refrigerant When the refrigerant system is to be opened refrigerant MUST be treated according to the applicable legislation NOTICE Make sure refrigerant piping installat...

Страница 12: ...or more information NOTICE Make sure water quality complies with EU directive 2020 2184 2 1 5 Electrical DANGER RISK OF ELECTROCUTION Turn OFF all power supply before removing the switch box cover con...

Страница 13: ...or WARNING After finishing the electrical work confirm that each electrical component and terminal inside the electrical components box is connected securely Make sure all covers are closed before sta...

Страница 14: ...n the radio waves a distance of 1 meter may NOT be sufficient NOTICE ONLY applicable if the power supply is three phase and the compressor has an ON OFF starting method If there exists the possibility...

Страница 15: ...gas appliance or an operating electric heater WARNING DO NOT reuse refrigerant piping that has been used with any other refrigerant Replace the refrigerant pipes or clean thoroughly Special requireme...

Страница 16: ...trical parts can cause malfunctions smoke or fire WARNING Some sections of the refrigerant circuit may be isolated from other sections caused by components with specific functions e g valves The refri...

Страница 17: ...ipe surge absorber or telephone earth Incomplete earthing may cause electrical shock Install the required fuses or circuit breakers Secure the electrical wiring with cable ties so that the cables do N...

Страница 18: ...al risk for human injuries a mixing valve field supply shall be installed at the hot water outlet connection of the domestic hot water tank This mixing valve shall secure that the hot water temperatur...

Страница 19: ...e unit is disconnected from the mains Turn off the respective circuit breaker When a safety device was activated stop the unit and find out why the safety device was activated before resetting it NEVE...

Страница 20: ...inal installation position In this chapter 4 1 Overview About the box 20 4 2 Indoor unit 21 4 2 1 To unpack the indoor unit 21 4 2 2 To remove the accessories from the indoor unit 21 4 1 Overview Abou...

Страница 21: ...door unit 4 2 1 To unpack the indoor unit 4 2 2 To remove the accessories from the indoor unit Some accessories are located inside the unit For more information on opening the unit see 7 2 2 To open t...

Страница 22: ...nit Location Model identification Example EK HW E T 120 BA V3 Code Description EK European Kit Daikin Branded HW Hot water for LT E Enamel T Wall mounted 120 Volume in liter BA Model series V3 1 230 V...

Страница 23: ...n guidelines The purpose of the application guidelines is to give a glance of the possibilities of the heat pump system NOTICE The illustrations in the application guidelines are meant for reference o...

Страница 24: ...on Answer the following questions and calculate the DHW consumption equivalent hot water volume at 40 C using typical water volumes Question Typical water volume How many showers are needed per day 1...

Страница 25: ...ority setting it might not be able to do both DHW and A C at the same time In case you need DHW and A C at the same we recommend to produce the domestic hot water during the night when there is lower...

Страница 26: ...r limitation Permanent power limitation is useful to assure a maximum power or current input of the system In some countries legislation limits the maximum power consumption for space heating and DHW...

Страница 27: ...27 EKHWET90 120B R32 Split series Domestic hot water tank 4P680077 1A 2022 11 Ph Ce a b c A B Ph Produced heat Ce Consumed energy A Outdoor unit B Booster heater a Limited outdoor unit operation b Ful...

Страница 28: ...he site Do NOT install the unit in places often used as work place In case of construction works e g grinding works where a lot of dust is created the unit MUST be covered WARNING The appliance shall...

Страница 29: ...total refrigerant charge in the system is 1 84 kg the room where you install the indoor unit must also comply with the conditions described in 7 1 3 Installation patterns 431 WARNING Do NOT pierce or...

Страница 30: ...installation Installer reference guide 30 EKHWET90 120B R32 Split series Domestic hot water tank 4P680077 1A 2022 11 NOTICE Protect pipework from physical damage Keep the pipework installation to a m...

Страница 31: ...cent room c1 Bottom opening for natural ventilation c2 Top opening for natural ventilation Hrelease Actual release height From floor to 100 mm below top of the unit N A Not applicable Minimum floor ar...

Страница 32: ...at the bottom one at the top between the rooms to ensure natural ventilation The openings must comply with the following conditions Bottom opening Anv Must be a permanent opening that cannot be close...

Страница 33: ...ase height Anv Anv min A B You can install the unit in room A if you create ventilation openings Ventilation openings must comply with Anv min and with Conditions ventilation openings on previous page...

Страница 34: ...or areas use the column with the lower value Example If the floor area is 5 m use the column of 4 00 m For intermediate release height values use the row with the lower value Example If the release he...

Страница 35: ...where the indoor unit is installed Must be protected from frost a1 Anv Bottom opening for natural ventilation between the unoccupied room and the outside Must be a permanent opening that cannot be clo...

Страница 36: ...Example If the refrigerant charge is 2 55 kg use the row of 2 6 kg Total refrigerant charge kg Anv min dm 2 20 7 5 2 30 7 7 2 40 7 9 2 50 8 0 2 60 8 2 7 2 Opening and closing the units 7 2 1 About op...

Страница 37: ...s NOT exceed 2 94 N m 7 3 Mounting the indoor unit 7 3 1 About mounting the indoor unit When You have to mount the outdoor and indoor unit before you can connect the refrigerant and water piping 7 3 2...

Страница 38: ...ater tank 4P680077 1A 2022 11 440 300 711 mod 90 963 mod 120 mm 2 2 Lift the unit 45 kg 3 Attach the unit to the wall Locate the bracket on the back of the unit above the 2 bolts Lower the bracket on...

Страница 39: ...ements in the 2 General safety precautions 49 Piping connections Only flare and brazed connections are allowed The indoor and outdoor units have flare connections Connect both ends without brazing If...

Страница 40: ...en connecting the piping Deformation of the piping can cause malfunctioning of the unit Connecting piping Tools Only use appropriate tooling to handle brass which is a soft material If NOT pipes will...

Страница 41: ...servicing Non brass metallic piping When using non brass metallic piping insulate the brass and non brass properly so that they do NOT make contact with each other This to prevent galvanic corrosion...

Страница 42: ...er piping Make sure the outdoor and indoor unit are mounted Typical workflow Connecting the water piping typically consists of the following stages 1 Connecting the water piping to the indoor unit 2 F...

Страница 43: ...ves between the domestic hot water tank and the pressure relief valve NOTICE A pressure relief valve field supply with an opening pressure of maximum 7 bar 0 7 MPa must be installed on the domestic co...

Страница 44: ...T90 120B R32 Split series Domestic hot water tank 4P680077 1A 2022 11 3 Close all water taps after all air is purged 4 Check for water leaks 5 Manually operate the field installed pressure relief valv...

Страница 45: ...rtridge delivered as accessory 50 9 1 About connecting the electrical wiring Typical workflow Connecting the electrical wiring typically consists of the following stages 9 2 Connections to the indoor...

Страница 46: ...l reduce performance and may cause accidents CAUTION Do NOT push or place redundant cable length into the unit NOTICE The distance between the high voltage and low voltage cables should be at least 50...

Страница 47: ...tion c b c a a A AA A a Curled wire single core or twisted stranded conductor wire b Screw c Flat washer Stranded conductor wire with round crimp style terminal c b b a c a B B a Terminal b Screw c Fl...

Страница 48: ...wer supply 448 Power supply booster heater See 9 2 2 To connect the booster heater power supply 449 WLAN cartridge See 9 2 3 To connect the WLAN cartridge delivered as accessory 450 9 2 1 To connect t...

Страница 49: ...r heater cable Wires 2 GND 1 5 mm 9 4 Booster heater WARNING The booster heater MUST have a dedicated power supply and MUST be protected by the safety devices required by the applicable legislation CA...

Страница 50: ...power supply cable b Field wiring 9 2 3 To connect the WLAN cartridge delivered as accessory D Wireless gateway 1 Insert the WLAN cartridge into the cartridge slot on the user interface of the indoor...

Страница 51: ...0 10 6 3 User settings 78 10 6 4 Information 81 10 6 5 Installer settings 82 10 6 6 Commissioning 87 10 6 7 User profile 88 10 6 8 Operation 88 10 6 9 WLAN 88 10 7 Menu structure Overview user setting...

Страница 52: ...s via the breadcrumb in the home menu screen or the menu structure To enable breadcrumbs press the button in the home screen For example 5 5 Accessing settings via the code in the overview field setti...

Страница 53: ...rview settings then the overview settings can be accessed as follows 1 Set the user permission level to Installer See To change the user permission level 452 2 Go to 9 I Installer settings Overview fi...

Страница 54: ...required 1 Connect the USB connector of the cable to your PC 2 Connect the plug of the cable to X10A on A1P of the switch box of the indoor unit X10A A1P 3 Pay special attention to the position of the...

Страница 55: ...nit type read only 10 6 5 Installer settings 482 Domestic hot water not adjustable Emergency 9 5 1 Booster heater capacity 9 4 1 10 6 5 Installer settings 482 Tank Heat up mode 5 6 10 6 2 Tank 470 Com...

Страница 56: ...with weather dependent curve c4 Screen with schedule 10 3 2 Home screen Press the button to go back to the home screen You see an overview of the unit configuration and the room and setpoint temperat...

Страница 57: ...utdoor unit f Indoor unit domestic hot water tank f Domestic hot water tank g Holiday mode Holiday mode active h Malfunction A malfunction occurred See 14 4 1 To display the help text in case of a mal...

Страница 58: ...on Only for the installer Gives access to advanced settings A Commissioning Restriction Only for the installer Perform tests and maintenance B User profile Change the active user profile C Operation T...

Страница 59: ...rature limit a1 Fixed by the unit a2 Restricted by the installer Maximum temperature limit b1 Fixed by the unit b2 Restricted by the installer Current temperature c Measured by the unit Desired temper...

Страница 60: ...preset values in 5 5 Schedule weekly schedule screen for the DHW tank if the DHW tank mode is one of the following Schedule only Schedule reheat 5 3 Eco setpoint 5 4 Reheat setpoint The software uses...

Страница 61: ...ecific control If needed you can Program your own schedule See 10 4 3 Schedule screen Example 462 Predefined schedules if applicable The predefined schedule in the system for the specific control If n...

Страница 62: ...me time outdoor unit will prioritize Air Conditioning heating cooling operation 7 4 2 User settings Quiet Schedule Schedule for when the unit has to use which quiet mode level Predefined schedule Not...

Страница 63: ...ed Fri Thu Tue Sun User defined 2 Select Delete Delete 3 Select OK to confirm To clear the content of a day schedule 1 Select the day of which you want to clear the content For example Friday Mon Sat...

Страница 64: ...e changes Result The schedule for Monday is defined The value of the last action is valid until the next programmed action In this example Monday is the first day you programmed Thus the last programm...

Страница 65: ...y 7 Select Sunday 8 Select Paste Result Mon Sat Wed Fri Thu Tue Sun User defined C 10 5 Weather dependent curve 10 5 1 What is a weather dependent curve Weather dependent operation The unit operates w...

Страница 66: ...urve Which type of curve you use to make adjustments depends on your personal preference See 10 5 4 Using weather dependent curves 468 Availability The weather dependent curve is available for Tank on...

Страница 67: ...ient temperatures For example if the tank temperature is always a bit too cold at different ambient temperatures shift the offset up to equally increase the tank target temperature for all ambient tem...

Страница 68: ...ther dependent To change the type of weather dependent curve To change the type for the tank go to 5 E Tank 5 E Tank WD curve type Restriction Only available to installers To change the weather depend...

Страница 69: ...the tank The domestic hot water temperature is Fine tune with setpoints At regular outdoor temperatures At cold outdoor temperatures Y2 a Y1 a X1 a X2 a OK Cold OK Hot Cold OK Cold Cold Cold Hot Hot O...

Страница 70: ...n For more information about how to do this see 10 3 5 Setpoint screen 458 Powerful operation You can use powerful operation to immediately start heating up the water to the preset value Comfort setpo...

Страница 71: ...an be programmed This feature puts a stop to tank heating even if the setpoint has NOT been reached Only program a storage stop when tank heating is absolutely undesirable Code Description 5 2 6 0A Co...

Страница 72: ...and comfort problem is significant In case of frequent reheat operation space heating cooling function is regularly interrupted INFORMATION The application of hysteresis the amount of the temperature...

Страница 73: ...value This maximum allowable hot water temperature shall be selected according to the applicable legislation CAUTION Make sure that the disinfection function start time 5 7 3 with defined duration 5 7...

Страница 74: ...when domestic hot water preparation is reheat only When the tank temperature drops below the reheat temperature minus the heat pump ON hysteresis temperature the tank heats up to the reheat temperatu...

Страница 75: ...peration the end user cannot adjust the desired tank temperature on the user interface Also see 10 5 Weather dependent curve 465 Code Description 5 C 0 0E 0 0D 0 0C 0 0B WD curve Note There are 2 meth...

Страница 76: ...THP ON Heat pump ON temperature THP OFF 6 00 or THP OFF 6 08 TDHW Domestic hot water temperature TU User setpoint temperature as set on the user interface t Time Example setpoint TU maximum heat pump...

Страница 77: ...y one of the requested operation Code Description 5 F A 00 Priority schedule 0 DHW 1 A C If DHW and A C requests happen at the same time the possible outcomes based on scheduled Priority settings are...

Страница 78: ...er heater can still start after 20 minutes to assist the heat pump 10 6 3 User settings Overview The following items are listed in the submenu 7 User settings Information Tank Malfunctioning Installer...

Страница 79: ...ct On 2 Set the first day of your holiday Go to 7 3 2 From Select a date Confirm the changes 3 Set the last day of your holiday Go to 7 3 3 Till Select a date Confirm the changes Quiet About quiet mod...

Страница 80: ...quiet mode level The user cannot change this Enable the user to program a quiet mode schedule AND OR Configure restrictions based on local regulations Select Automatic Result The user or you can progr...

Страница 81: ...o No OFF Yes Follows schedule Yes No Follows restriction Yes During restricted time If restricted level is stricter than scheduled level then follows restriction Else follows schedule Outside restrict...

Страница 82: ...oor temperature Tank temperature 8 5 Actuators Status mode of each actuator Booster heater 8 6 Operation modes Current operation mode Example Defrost oil return mode 8 7 About Version information abou...

Страница 83: ...eater capacity kW The capacity of the booster heater at nominal voltage Range 0 10 kW Quick mode timer Code Description 9 4 3 8 03 Booster heater delay timer Start up delay time for the booster heater...

Страница 84: ...15_C or Ta 42 C Domestic hot water temperature is 2 C lower than the heat pump OFF temperature 9 4 4 4 03 3 Compressor off The booster heater is allowed when the heat pump is NOT active in domestic h...

Страница 85: ...led 1 Continuous Enabled You can set one power limitation value in A or kW to which the system power consumption will be limited for all the time 9 9 2 4 09 Type 0 Amp The limitation values are set in...

Страница 86: ...er saving function Defines whether the outdoor unit power supply can be interrupted internally by indoor unit control during stand still conditions no air conditioning nor domestic hot water demand Th...

Страница 87: ...etting 9 G Disable protections No Overview field settings Almost all settings can be done using the menu structure If for any reason it is required to change a setting using the overview settings then...

Страница 88: ...ser profile Operation Commissioning Installer settings Malfunctioning B User profile 10 6 8 Operation Overview The following items are listed in the submenu C Operation Malfunctioning User profile Com...

Страница 89: ...owing components b a c a WLAN cartridge The WLAN cartridge needs to be inserted in the user interface See the installation manual of the WLAN cartridge b Router Field supply c Smartphone app The ONECT...

Страница 90: ...ion of the WLAN and the software version of the ONECTA app Remove from cloud Remove the WLAN cartridge from the cloud Code Description D 4 N A Remove from cloud No Yes Home network connection Read out...

Страница 91: ...mat 7 3 Holiday Activation From Till 7 4 Quiet Mode Schedule Level 5 Tank Powerful operation Comfort setpoint Eco setpoint Reheat setpoint Schedule WD curve WD curve type D Wireless gateway Mode Reboo...

Страница 92: ...r Emergency Power consumption control Auto restart Power saving function Disable protections Overview field settings 9 4 Booster heater Capacity Quick mode timer Operation Export MMI settings 9 9 Powe...

Страница 93: ...Afterwards An installer can manually disable the protective functions by setting 9 G Disable protections Yes After his work is done he can enable the protective functions by setting 9 G Disable prote...

Страница 94: ...the outdoor unit Between indoor unit and outdoor unit Between the local supply panel and the indoor unit The system is properly earthed and the earth terminals are tightened The fuses or locally insta...

Страница 95: ...information 1 Set the user permission level to Installer See To change the user permission level 452 2 Go to A 1 Commissioning Operation test run 3 Select the Tank 4 Select OK to confirm Result The te...

Страница 96: ...2022 11 2 Go to A 2 Commissioning Actuator test run 3 Select Booster heater 4 Select OK to confirm Result The actuator test run starts It stops automatically when ready 30 min To stop the test run ma...

Страница 97: ...ing table in the operation manual with the actual settings Make sure that the user has the printed documentation and ask him her to keep it for future reference Inform the user that he can find the co...

Страница 98: ...icable legislation on fluorinated greenhouse gases requires that the refrigerant charge of the unit is indicated both in weight and CO2 equivalent Formula to calculate the quantity in CO2 equivalent t...

Страница 99: ...a thorough visual inspection of the switch box and look for obvious defects such as loose connections or defective wiring Using an ohmmeter check if contactor K3M operates correctly All contacts of th...

Страница 100: ...stic hot water tank DANGER RISK OF BURNING SCALDING The water in the tank can be very hot Prerequisite Stop the unit operation via the user interface Prerequisite Turn OFF the respective circuit break...

Страница 101: ...ymptoms Solving problems based on error codes Before troubleshooting Carry out a thorough visual inspection of the unit and look for obvious defects such as loose connections or defective wiring 14 2...

Страница 102: ...pping is expected Large domestic hot water tapping happened recently before the programmed start up of the disinfection function If in 5 6 Tank Heat up mode the mode Reheat only or Schedule reheat is...

Страница 103: ...een 2 Press in the error screen Result A long description of the error is displayed on the screen WARNING In case F3 00 there is possible risk of refrigerant leak Contact your installer 14 4 2 Error c...

Страница 104: ...sition detection sensor H8 00 OU Malfunction of compressor input CT system H9 00 OU Malfunction of outdoor air thermistor HC 00 Tank temperature sensor problem J3 00 OU Malfunction of discharge pipe t...

Страница 105: ...tdoor unit matching problem UA 17 Tank type problem UF 00 Reversed piping or bad communication wiring detection UH 00 Indoor unit malfunction or frost in other indoor units INFORMATION In case of erro...

Страница 106: ...thermostatic safety the unit will not give an error directly Check if the booster heater is still in operation if you experience one or more of the following errors Powerful operation takes a very lo...

Страница 107: ...2 11 15 Technical data A subset of the latest technical data is available on the regional Daikin website publicly accessible The full set of latest technical data is available on the Daikin Business P...

Страница 108: ...ter tank 4P680077 1A 2022 11 15 1 Piping diagram Indoor unit R5T a1 c a2 R3T b1 b2 3D138207 a1 Domestic hot water hot water out Thermistors a2 Domestic hot water cold water in R3T Thermistor heat exch...

Страница 109: ...supply terminal strip client X8M Booster heater power supply terminal strip X X A X B Connector X M Terminal strip Optional Field supply Translation of text on wiring diagram English Translation 1 Con...

Страница 110: ...ng terminal for DC Indoor X5M Field wiring terminal for AC Outdoor X8M Booster heater power supply terminal strip Earth wiring Field supply Option Not mounted in switch box Wiring depending on model P...

Страница 111: ...it wiring Power supply OUTDOOR UNIT X5M 1 2 3 earth 4 core X2M 1 2 3 earth INDOOR UNIT 1 1 booster heater power supply 1 2 kW 230 V earth STANDARD PART X1M L N earth Only for normal power supply insta...

Страница 112: ...uct or application explaining how to install configure and maintain it Operation manual Instruction manual specified for a certain product or application explaining how to operate it Maintenance instr...

Страница 113: ...1 4 Field settings table Applicable indoor units EKHWET90BAV3 EKHWET120BAV3 4P688157 1 2021 11...

Страница 114: ...t 2 Most Quiet Installer settings Configuration wizard System 9 1 3 3 E 05 E 06 E 07 R O Integrated 9 1 3 4 4 06 R W 0 Manual 1 Automatic 9 1 3 7 6 02 R W 0 10kW step 0 2kW 1 2kW Tank 9 1 B 1 6 0D R W...

Страница 115: ...W 1 2kW 9 I 6 08 R W 2 20 C step 1 C 10 C 9 I 6 0A R W 30 6 0E C step 1 C 50 C 9 I 6 0B R W 30 min 50 6 0E C step 1 C 45 C 9 I 6 0C R W 30 min 50 6 0E C step 1 C 45 C 9 I 6 0D R W 0 Reheat only 1 Rehe...

Страница 116: ...volume 1 Integrated 2 Tank with BSH 3 EKHW large volume 5 EKHWP 7 Third party tank small coil 8 Third party tank large coil 9 I E 08 R W 0 Disabled 1 Enabled 9 I F 0A 0 Which indoor unit operation is...

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