Midea MDV-V18WMN10T Installation And Operation Manual
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Midea MDV-V18WMN10T Installation And Operation Manual

Midea MDV-V18WMN10T Installation And Operation Manual

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INSTALLATION AND
OPERATION MANUAL
Original instructions
Please read this manual carefully and keep it for future reference.
All the pictures in this manual are for illustration purpose only.

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Summary of Contents for Midea MDV-V18WMN10T

  • Page 1 INSTALLATION AND OPERATION MANUAL Original instructions Please read this manual carefully and keep it for future reference. All the pictures in this manual are for illustration purpose only.
  • Page 3 Air inlet Air outlet Figure 1 Refrigerant pipe connector Mounting bracket Air inlet Air outlet Refrigerant pipe connector Figure 2 Mounting bracket Air inlet Air outlet Refrigerant pipe connector Figure 3 Mounting bracket NOTICE The figures in this manual are for explanation purposes only. They may be slightly different from the air conditioner you purchased (depending on the model).

  • Page 4: Table Of Contents

    CONTENTS 1 About the Documentation 2 Safety Signs Explanation of Safety Signs Explanation of Symbols Displayed on the Unit Important Information for thedealer and service personnel Important Information for User About the Refrigerant Room Area Limitations Operation Manual 3 Important Information System Layout Requirements 4 System Information System Layout...
  • Page 5 12 Outdoor Unit Combination Ratio 13 Unit Installation 13.1 Choosing and Preparing the Installation Site Opening and Closing the Unit 13.2 Outdoor Unit Installation 13.3 14 Installation of Refrigerant Piping 14.1 Selecting and Preparing the Refrigerant Piping Connecting Refrigerant Piping 14.2 Checking Refrigerant Piping 14.3...

  • Page 6: About The Documentation

    1 About the Documentation CAUTION NOTICE Indicates a hazardous situation which, if not avoided, could result in minor or moderate injury Make sure that the user has the printed documentation and ask him/her to keep it for future reference. NOTICE Target audience is used to address practices not related to Authorised installers + end users...

  • Page 7: Important Information For Thedealer And Service Personnel

    WARNING 2.3 Important Information for the dealer and service personnel 6.Storage of packed (unsold) equipment Storage package protection should be constructed in such a way that mechanical WARNING damage to the equipment inside the package will not cause a leak of the REFRIGERANT Risk of Fire.
  • Page 8 WARNING WARNING Provision shall be made for expansion and The appliance connected via an air duct system contraction of long runs of piping; to one or more rooms are installed in a room For add on heat pumps with flammable with an area less than A , or installed in a refrigerants;...
  • Page 9 CAUTION CAUTION -The area shall be checked with an appropriate – refrigerating pipe or components are installed refrigerant detector prior to and during work, to in a position where they are unlikely to be ensure the technician is aware of potentially exposed to any substance which can corrode toxic or flammable atmospheres.
  • Page 10 WARNING CAUTION The outlet for the vacuum pump shall not be Leak detection fluids are also suitable for use close to any potential ignition sources, and with most refrigerants but the use of detergents ventilation shall be available. containing chlorine shall be avoided as the An inert gas, specifically, is dry oxygen free chlorine can react with the refrigerant and nitrogen(OFN).

  • Page 11: Important Information For User

    CAUTION CAUTION g) Start the recovery machine and operate in If compressors or compressor oils are to be accordance with instructions. removed, ensure that they have been evacuated to an acceptable level to make h) Do not overfill cylinders (no more than 80 % certain that flammable refrigerant does not volume liquid charge).
  • Page 12 WARNING CAUTION HOT SURFACE EARTHING REQUIRED May cause minor to severe burning. Failure to Failure to inspect or use proper service tools follow this Caution could result in property may result in equipment damage or personal damage or personal injury. injury.

  • Page 13: About The Refrigerant

    2.5 About the Refrigerant WARNING WARNING RISK OF FIRE Mild flammable refrigerant used. Follow The appliance uses R454B refrigerant. handling instructions carefully in compliance with national regulations. DANGER FIRE, EXPLOSION Store in a well ventilated room without continuously operating flames or other potential ignition.

  • Page 14: Room Area Limitations

    2.6 Room Area Limitations 1) Low level opening ①The opening shall not be less than Anv in Table 2-1 In UL/CSA 60335-2-40, R454B refrigerant is classified or Table 2-2. as class A2L,which is mildly flammable.Therefore, ②The area of any openings above 11-13/16 inches R454B refrigerant is suitable for systems needing (300 mm) from the floor shall not be considered in additional refrigerant charge and which will limit the...
  • Page 15 ≥50% of Anv ≥25/32” ≥59” ≥25/32” ≤11-13/16” ≤3-15/16” ≤7-7/8” Room B Room A Figure 2-1 Opening conditions for connected rooms Table2-1 The minimum opening area for connected rooms of VRF indoor unit . ft² m² 0.13 0.012 Table2-2 The minimum opening area for connected rooms of split indoor unit . 0.15 0.16 0.24...
  • Page 16 ft² m² ft² m² ft² m² ft² m² ft² m² ft² m² ft² m² 20.4 0.00 0.02 0.08 0.12 0.19 0.24 21.3 0.00 0.01 0.08 0.12 0.18 0.23 22.2 0.00 0.01 0.07 0.11 0.17 0.23 23.2 0.00 0.00 0.06 0.10 0.16 0.22 24.1...
  • Page 17 Figure 2-2 Room area Curve (a) is the Anv limit for the indoor unit installation height ≥ 7.2 ft (2.2 m) and m = 13.2 lb (6.0 kg). Curve (b) is the Anv limit for the indoor unit installation height 5.9 ft (1.8 m) ≤ ＜...
  • Page 18 The maximum refrigerant limit for the system is the smallest value among the maximum allowable system refrigerant amounts for each room (for split systems, refer to Table 2-4 based on room area). For example, a system with one outdoor unit and three VRF indoor units: Indoor unit A is installed in a room with an area of 150 ft²...
  • Page 19 (a): The effective room height not less than 13.2 ft (4.0 m) . (b): The effective room height between 9.9 ft (3.0 m) and 13.2 ft (4.0 m) . (c): The effective room height between 8.2 ft (2.5 m) and 9.9 ft (3.0 m) . (d): The effective room height between 7.2 ft (2.2 m) and 8.2 ft (2.5 m) .
  • Page 20 Table 2-4 The allowable maximum refrigerant charge for R454B split indoor unit A/TA A/TA A/TA A/TA 0.66 0.29 12.1 8.66 3.93 23.2 16.67 7.55 34.4 24.67 11.20 1.33 0.61 13.0 9.33 4.23 24.2 17.33 7.87 35.3 25.34 11.49 2.00 0.91 13.9 10.00 4.52...
  • Page 21 Table 2-5 The required minimum room area for R454B VRF indoor unit ft² m² ft² m² ft² m² ft² m² ft² m² ft² m² 11.0 13.2 15.0 16.5 18.4 16.5 22.0 26.4 30.0 33.0 36.7 24.8 33.0 39.6 45.0 49.5 55.0 33.0 44.0...
  • Page 22 Table 2-6 The required minimum room area for R454B split indoor unit 17.0 23.7 18.0 25.2 19.0 26.5 20.0 28.0 21.0 314.9 29.2 22.0 10.0 329.9 30.8 23.0 10.4 344.9 32.0 11.1 24.0 10.9 359.9 33.5 12.6 25.0 11.3 374.9 34.8 10.0 13.9...
  • Page 23 Table 2-8 The minimum circulation airflow for R454B split indoor unit m³/h m³/h 0.45 27.1 45.7 17.0 7.71 460.0 781.5 0.90 54.2 91.3 18.0 8.16 487.1 827.1 1.36 81.2 137.9 19.0 8.61 514.2 872.7 1.81 108.3 183.5 20.0 9.07 541.2 919.3 2.26 135.3...

  • Page 24: Operation Manual

    WARNING Installation scheme flow chart Ask your dealer to assist in the installation of Check if the minimum room the air conditioner. area meets the requirements Incomplete installation performed by yourself may result in a water leakage, electric shock, and fire. Determine the room size and the Ask your dealer to assist in the installation of refrigerant system configuration...

  • Page 25: System Information

    Equipment pipes in the occupied space in question 5 Operating Instructions must be installed in such a way that it is protected against accidental damage. 5.1 Operating Range NOTICE Use the system at the following temperatures to ensure Installation of pipe-work shall be kept to a safe and effective operation.

  • Page 26: Operating System

    5.2 Operating System 5.2.3 Heating operation 5.2.1 System operation It may take longer to reach the set temperature for general heating operation than for cooling operation. The operating program varies with different combina- The following operation is performed in order to prevent tions of outdoor unit and controller.

  • Page 27: Dry Program

    WARNING 5.3 Dry Program 5.3.1 System operations The refrigerant in the air conditioner is safe, and usually does not leak. The function in this program uses the minimum Do not use the air conditioner again until the temperature drop (minimum indoor cooling) to bring maintenance personnel has confirmed that about a drop in humidity in the room.

  • Page 28: Troubleshooting

    6.2.3 Maintenance and Repair 6.2.3.1 Maintenance Before Long Shutdown Each refrigerating system shall be subjected to preventative maintenance in accordance with legal For example, at the end of winter and summer. requirements. The frequency of maintenance depends Run the indoor unit in the fan mode for about half a on the type, size, age, use, etc.
  • Page 29 Table 7-1 Symptom Possible Cause Solution Power failure. Wait for the power supply to be restored. Power breaker is off. Turn on the power. The unit does not start. Batteries of the remote controller are Replace the batteries or check the depleted or there is another problem controller.

  • Page 30: Fault Symptom: Non Air Conditioning Issues

    7.3 Fault Symptom: Non Air Symptom 4.3: Outdoor unit Conditioning Issues When the tone of operating noise changes, the noise is caused by the change of frequency. Symptom 1: The system does not operate Symptom 5: Dust comes out of the unit The air conditioner does not start immediately after When the unit is being used for the first time after the ON/OFF button on the remote controller is...
  • Page 31 THIS AIR CONDITIONER ADOPTS THE NEW HFC WARNING REFRIGERANT(R454B) WHICH DOES DESTROY THE OZONE LAYER. Exposure of the unit to water or other moisture before installation may cause a short-circuiting of The characteristics of R454B refrigerant are: it is a electrical parts.

  • Page 32: Packing Box

    11.2 Transportation Required tools for installation work 1) Phillips screw driver Lifting method 2) Hole core drill [2.56 in (65 mm)] 3) Spanner NOTICE 4) Pipe cutter 5) Knife Do not remove any packaging during lifting. If 6) Reamer the unit is not packaged or the packaging is 7) Gas leak detector damaged, please use gaskets or packaging 8) Tape measure...

  • Page 33: Unpacking The Outdoor Unit

    The center of gravity is shown in the following figure: Forklift lifting method When using a forklift to move the unit, insert the fork into the opening at the bottom of the unit, as shown in the following figure. Figure 11-3 Figure 11-6 11.3 Unpacking the Outdoor Unit Remove the unit from the packing materials:...

  • Page 34: Outdoor Unit Combination Ratio

    VRF of split Outdoor unit model unit indoor indoor (ton) units units 1.5/2.0 ton MDV-V18WMN10T 1 ~ 3 1 ~ 4 MDV-V24WMN10T MDV-V30WMN10T 1 ~ 5 MDV-V36WMN10T 1 ~ 5 MDV-V48WMN10T 1 ~ 7 MDV-V60WMN10T 1 ~ 9...
  • Page 35 4.0/5.0 ton 13.1.2 Placement Consideration WARNING Use the provided and specified components when installing equipment. Failure to do so may result in unit falling, water leaking or electrical shocks, causing personal injury or equipment or property damage. The outdoor unit shall be located in a well-ventilated location other than the occupied space, such as in the open air.
  • Page 36 Installation of single outdoor unit Unit: in (mm) (Wall or partition) Air Inlet 12 (305) Minimum (305) Minimum (610) Air inlet Minimum (Service Front of Unit Clearance) 79 (2007) Air Outlet Minimum NOTE If unit is surrounded on three or four sides by walls or partitions that are taller than 10 ft (3 m ), call your dealer to discuss additional requirements .
  • Page 37 In addition to clearances, the following items should NOTICE be considered when setting the outdoor unit: • Some local governments have adopted sound When outdoor units are installed in coastal areas ordinances based on the unit’s sound level or high floors of buildings where they are registered from the adjacent property, not from the frequently exposed to strong winds, fans should property where the unit is installed.
  • Page 38 Unit: in (mm) Unit: in (mm) Protective Protective Prevailing Winter Winds from Air Inlet Side canopy canopy Wind Barrier Inlet Air 12 (305) Min. Distance (305) Air Inlet Outlet 79 (2007) Discharge Air Min. Distance Wind Barrier Prevailing Winter Winds From Air Discharge Side Side View Front View Figure 13-11...

  • Page 39: Opening And Closing The Unit

    Unit: in (mm) 13.2 Opening and Closing the Unit 13.2.1 Opening the outdoor unit CAUTION Risk of electric shock. (305) Risk of burns. Air Inlet 1.5/2.0 ton Air Outlet Figure 13-15 unit on brackets above snow line Figure 13-17 2.5/3.0 ton Figure 13-16 avoid defrost water ice hazard...
  • Page 40 13.2.2 Closing the outdoor unit NOTICE Ensure that the tightening torque does not exceed 3.023 ft·lb (4.1 N·m) when closing the outdoor unit cover. 1.5/2.0 ton Figure 13-18 4.0/5.0 ton Figure 13-20 2.5/3.0 ton X 11 Figure 13-21 4.0/5.0 ton X 11 Figure 13-19 Figure 13-22...

  • Page 41: Outdoor Unit Installation

    13.3 Outdoor Unit Installation Securing Outdoor Unit to Slab or Frame -Brackets are provided at the base of the outdoor unit 13.3.1 Preparing the Structure for so that it can be secured to a field-provided slab or Installation frame. -Use lag bolts or equivalent to secure the outdoor unit NOTICE to the slab or frame.

  • Page 42: Installation Of Refrigerant Piping

    NOTICE Seal: R454B does not contain fluorine, does not drain destroy the ozone layer, and does not deplete hole the ozone layer that protects the earth from harmful ultraviolet radiation. However, if it is released, R454B can also cause a slight greenhouse effect.
  • Page 43 Schematic diagram of the allowable length and height difference for refrigerant piping Outdoor unit Maximum equivalent piping length from the outdoor unit to the farthest indoor unit Maximum piping length from the first branch joint to the farthest indoor unit First branch Refrigerant shut-off joint...
  • Page 44 Outdoor unit Figure 14-3 14.1.4 Allowable length and height difference for refrigerant piping Table 14-2 Permitted value Piping 1.5/2.0 ton ≤ 492 ft (150 m) L1 + L3 + L4 + L5 + L6 + a + b + c + d + e + Length of refrigerant f or L1 + L7 + L8 + g + h + j + k + l 2.5/3.0/4.0/5.0 ton...

  • Page 45: Refrigerant Pipe Selection

    Oil return bend (unit: mm) NOTICE If the outdoor unit is above and the level difference is greater than 20m, it is recommended that an oil return bend with dimensions as specified in Figure 14-4 is set every 10m in the gas pipe of the main pipe.
  • Page 46 Main pipes (L2) for One-to-One Connection to Non-VRF Air Handler of Furnace Retrofit Installations Table 14-6 Outdoor unit Existing line sets Outdoor unit Gas pipe existing line Liquid pipe existing line Gas pipe Liquid pipe model (ton) 5/8 in 3/4 in 7/8 in 1-1/8 in 1/4 in...
  • Page 47 Example of refrigerant piping selection: Size of outdoor unit stop valve Table 14-9 Size of outdoor unit stop valve Outdoor unit model (ton) gas side liquid side 5/8 in (15.88 mm) 3/8 in (9.52 mm) 5/8 in (15.88 mm) 3/8 in (9.52 mm) 5/8 in (15.88 mm)

  • Page 48: Connecting Refrigerant Piping

    Connection of flaring(1.5/2.0 ton) 14.2 Connecting Refrigerant Piping 14.2.1 Things to Note When Connecting the Refrigerant Piping CAUTION Take appropriate precautions to prevent refrigerant leakage and ventilate the area immediately if the refrigerant leaks, as high concentration of R454B refrigerant in an enclosed Side connection area can cause poisoning or fire.
  • Page 49 Front out pipe connection mode Connection of flaring(4.0/5.0 ton) Gas pipe (Provided on site) Liquid pipe (Provided on site) Figure 14-9 Side out pipe connection mode Side connection Gas pipe (Provided on site) Figure 14-13 Liquid pipe (Provided on site) Figure 14-10 Bottom out pipe connection mode Gas side stop valve...
  • Page 50 CAUTION 14.2.2.3 Method of piping brazing connection Flow the pipework with dry (oxygen-free) nitrogen 2.9 Bottom out pipe: The knock out shall be from psig (20 kPa) or 3 CFH (85 LPH) during brazing to inside to outside, and then piping and wiring avoid oxidation which may block the refrigerant piping.

  • Page 51: Checking Refrigerant Piping

    14.3 Checking Refrigerant Piping 14.3.1 Refrigerant Piping Settings Pressure gauge Yellow hose Ootdoor unit R454B refrigerant tank Vacuum pump Field piping Blue hose Red hose Weighing scale Indoor Indoor unit A unit B Gas pipe stop valve ① Liquid pipe stop valve ②...

  • Page 52: Gas Tightness Test

    14.3.3 Gas Tightness Test Outdoor unit Liquid side of To prevent faults caused by refrigerant leakage, a gas stop valve tightness test should be performed before system commissioning. Gas side of stop valve CAUTION Only dry nitrogen should be used for gas tightness testing.

  • Page 53: Piping Insulation

    During vacuum drying, a vacuum pump is used to lower 14.3.6.2 Pipe wrapping the pressure in the piping to the extent that any moisture present evaporates. At 0.197 in (5 mm) Hg To avoid condensation and water leakage, the [29.7 in (755 mm) Hg below typical atmospheric connecting pipe must be wrapped with tape to ensure pressure] the boiling point of water is 32 ºF (0 ºC).

  • Page 54: Refrigerant Charging

    15 Refrigerant Charging 15.1 Calculating Additional Refrigerant Charge WARNING The additional refrigerant charge required depends on the lengths and diameters of the outdoor and indoor Use only R454B as the refrigerant. Other liquid pipes and the capacity of the indoor unit substances may cause explosions and connected.
  • Page 55 Table 15-4 NOTICE Maximum refrigerant Outdoor unit model (ton) charge amount lb (kg) Make sure all connected indoor units have been identified. 13.2 lb (6.0 kg) Hoses or lines shall be as short as possible 13.2 lb (6.0 kg) to minimize the amount of refrigerant 21.5 lb (9.8 kg) contained in them.

  • Page 56: Electrical Wiring

    16 Electrical Wiring NOTICE In the U.S.A., wiring must conform with current local Electrostatic discharge can affect electronic codes and the current National Electric Code (NEC). In components. Take care during unit installation Canada, wiring must conform with current local codes and service to protect the unit’s electronic and the current Canadian Electrical Code (CEC).
  • Page 57 Power Terminal Strip Unitary Comm. / M1 M2 E O+ A- Power wire IDU Comm. Controller Power For VRF Meter Figure 16-1 Communication Power wire wire conduit conduit Power wire Communication conduit wire conduit Power wire Communication conduit wire conduit Figure 16-2 NOTICE 1.
  • Page 58 Blue/Red/Black U V W Control Board CN12 Pc/Pe EARTH T7C1 CN21 DSP1 DSP2 CN14 COMP. Power In CN18 MENU DOWN ENC1 CN17 HEAT CN16 CN414 CN101 HEATB CN27 CN15 Blue/Red/Black L-PRO Compressor & Fan CN32 CN25 Drive Board EEVA DEBUG CN102 CN10 CN33...
  • Page 59 Black/Brown/Gray CN13 Control Board CN12 EARTH T7C1 CN21 DSP1 DSP2 CN14 Power In COMP. CN18 MENU DOWN HEAT ENC1 CN17 CN16 CN11 CN32 HEATB CN27 CN15 Black/Brown/Gray Compressor & Fan EEVA CN25 Drive Board DEBUG CN16 CN10 EEVD CN33 CN29 CN24 CN28 CN30 CN29 L1_IN...
  • Page 60 Red/Black/Blue FAN_UP FAN_DOWN U V W CN13 Control Board CN12 COMP. EARTH T7C1 CN21 DSP1 DSP2 CN14 Power In CN18 MENU DOWN HEAT ENC1 CN17 Compressor & Fan CN16 HEATB Drive Board CN27 CN15 CN25 EEVA CN25 EARTH EARTH DEBUG CN24 L2_IN L1_IN...

  • Page 61: Communication Wires Connections

    16.1 Communication Wires Connections 1. Table 16-4 defines the maximum total length of low voltage wires from the outdoor unit to the indoor unit. Table 16-4 HyperLink (M1M2) communication wires Wires Size Max Length 16/18 AWG 6561ft (about 2000 m) Conventional 24VAC non-communicating control wires Wires Size Max Length...
  • Page 62 16.1.2 Wiring diagram for conventional 24VAC non-communicating control mode Wiring for 3H and 2C thermostat BROWN BLACK WHITE BLUE PURPLE YELLOW YELLOW WHITE GREEN BLACK BLUE GRAY H/DH THERMOSTAT AIR HANDLERS UNIT OUTDOOR UNIT Note: Any time the electric heat elements are active, the indoor fan will run in high stage. 3H and 2C thermostat Figure 16-7 non-communicating control mode setup...
  • Page 63 Wiring for 3H and 1CThermostat BROWN BLACK WHITE BLUE PURPLE YELLOW YELLOW WHITE GREEN BLACK BLUE GRAY H/DH THERMOSTAT AIR HANDLERS UNIT OUTDOOR UNIT Note: Any time the electric heat elements are active, the indoor fan will run in high stage. 3H and 1C Thermostat Figure 16-9 Non-communicating Control Mode Setup...
  • Page 64 Wiring for 1H and 1CThermostat BROWN BLACK WHITE BLUE PURPLE YELLOW YELLOW WHITE GREEN BLACK BLUE GRAY H/DH THERMOSTAT AIR HANDLERS UNIT OUTDOOR UNIT Note: Any time the electric heat elements are active, the indoor fan will run in high stage. 1H and 1C Thermostat Figure 16-11 Non-communicating Control Mode Setup...

  • Page 65: Power Wires Connections

    16.2 Power Wires Connections CAUTION In the U.S.A., wiring must conform with current local Avoid sharp metal edges for wires to prevent codes and the current National Electric Code (NEC). In wear, or it may lead to short circuit or electric Canada, wiring must conform with current local codes leakage and cause danger.
  • Page 66 Abbreviations: MCA: Minimum circuit ampacity (A); MOP: Maximum overcurrent protection amps (A); MSC: Maximum starting current (A); RLA: Rated load amps (A); FLA: Full load amps(A). The unit is compatible with electrical systems that satisfy the following condition: The voltage supplied to the unit terminal is not lower than or greater than the listed value.

  • Page 67: Configuration

    17 Configuration 17.2.3 Menu mode 17.1 Overview 1. 1. Press and hold SW1 “MENU” button for 5 seconds to enter menu mode, and the digital display will display This chapter describes how the system configuration “n1”. can be implemented once the installation is complete, and other relevant information.
  • Page 68 Table 17-3 First-level Second- Specified Description Default menu Level Menu Menu Mode History error Cleaning history error Query lndoor unit's address Driver's version(compressor and fan displayed in turn) Cooling Test Heating Test Refrigerant recovery to outdoor unit Refrigerant recovery to indoor unit Balance system refrigerant Manual charge Auto charge...
  • Page 69 First-level Second- Specified Description Default menu Level Menu Menu Mode 0 ft (0 m) level difference between indoor unit and outdoor unit √ 33 ft (10 m) level difference between indoor unit and outdoor unit 66 ft (20 m) level difference between indoor unit and outdoor unit 98 ft (30 m) level difference between indoor unit and outdoor unit 131 ft (40 m) level difference between indoor unit and outdoor unit 164 ft (50 m) level difference between indoor unit and outdoor unit...
  • Page 70 First-level Second- Specified Description Default menu Level Menu Menu Mode Refrigerant shut-off device unavailable √ Refrigerant shut-off device available No compressor lockout temperature √ -22 °F (- 30 °C ) compressor lockout temperature -15 °F (- 26 °C ) compressor lockout temperature -8 °F (- 22 °C ) compressor lockout temperature 0 °F (- 18 °C ) compressor lockout temperature 7 °F (- 14 °C ) compressor lockout temperature...
  • Page 71 First-level Second- Specified Description Default menu Level Menu Menu Mode Dry contact 1 function selection (Cooling only) Dry contact 1 function selection (Heating only) Dry contact 1 function selection (Force incapacity requirements) Dry contact 1 function selection (Force stop) √ Dry contact 2 function selection (Cooling only) Dry contact 2 function selection (Heating only) Dry contact 2 function selection (Force incapacity requirements)

  • Page 72: Display Function

    17.3 Display Function Before pressing the UP or DOWN button, allow the system to operate steadily for more than an hour. On pressing the UP or DOWN button, the parameters listed in the following table will be displayed in sequence. Table 17-4 Disp.

  • Page 73: Commissioning

    Disp. Content Descriptio [0] Not in special mode [1] Oil return [2] Defrost Special mode [3] Startup [4] Stop [5] Quick check [6] Reserved Silent mode setting 0 ~ 5, 5 represents the most silent Reserved TES (Evaporating sensor temperature) Actual temperature=DISP.

  • Page 74: Commossioning

    Table 18-1 Check list Check list Oil leak Read the complete installation and Check if there is oil leaking from the operation manual. compressor and piping. Installation If there is an oil leak, try to repair the leak. Check that the units are properly installed, to If the repair is not successful, please call avoid abnormal noises and vibrations when the local agent.
  • Page 75 The system is powered on Outdoor Unit Display and display “-.-.-.-.” Long press DOWN and UP buttons simultaneously for 5 seconds on the outdoor unit to enter the commissioning mode. Short press Choose the type Set the type of indoor units. the MENU of indoor units.

  • Page 76: Rectifications After Commissioning Is Completed

    18.4 Rectifications after NOTE - The indoor unit must be in cooling mode for auto charge to work. The indoor unit cannot be in heating Commissioning Is Completed mode or fan-only mode. The Commissioning is considered complete when there is no error code on the user interface or the outdoor unit Turn ON the indoor unit in the display.
  • Page 77 Auto-charging port Refrigerant supply Figure 18-1 1.5-2.0 ton Cabinet Auto Charge Port Auto-charging port Refrigerant supply Figure 18-2 2.5-3.0 ton Cabinet Auto Charge Port Auto charging port Refrigerant supply Figure 18-3 4.0-5.0 ton Cabinet Auto Charge Port...

  • Page 78: Troubleshooting

    19 Troubleshooting 19.1 Error Code: Overview If an error code is displayed on the controller, contact the installation personnel and inform them of the error code, unit model, and serial number (you can find the information on the nameplate of Unit). Table 19-1 Error Codes of Outdoor unit Manual re-start Error code...
  • Page 79 Table 19-2 Installation and debugging error code Manual re-start Error code Error description require Technology barrier Unit type is not set Capacity setting error Indoor unit type setting error Indoor unit with old platform in the system The test run is not performed or was not successful Outdoor temperature out of operating range Indoor temperature out of operating range Outdoor and indoor temperature out of operating range...

  • Page 80: Precautions For Refrigerant Leak

    Table 19-5 Status code Manual re-start Error code Error description require Oil return running, x represents oil return operation steps Defrost running, x represents defrosting operation steps Outdoor ambient temperature exceeds the upper limit in Heating mode Outdoor ambient temperature exceeds the lower limit in Heating mode Outdoor ambient temperature exceeds the upper limit in Cooling mode Outdoor ambient temperature exceeds the lower limit in Cooling mode 19.2 Precautions for Refrigerant Leak...

  • Page 81: Specifications

    20 Specifications 20.1 Piping Diagram: Outdoor unit 1.5/2.0 ton Liquid stop valve EEVA GLQ2 GLQ1 18.1 18.2 Gas stop valve GLQ3 18.3 Legend Component name Compressor One way valve High pressure switch 4-way valve (ST1) Heat exchanger Electronic expansion valve (EEVA) Radiator Stop valve (liquid side) Stop valve (gas side)
  • Page 82 2.5/3.0 ton Liquid stop valve EEVA GLQ2 GLQ1 20.1 20.2 Gas stop valve GLQ3 20.3 Legend Component name Compressor High pressure switch Oil separator High pressure sensor One way valve 4-way valve (ST1) Heat exchanger EEVD Electronic expansion valve (EEVA) GLQ2 Radiator Stop valve (liquid side)
  • Page 83 4.0/5.0 ton Liquid stop valve EEVA GLQ2 GLQ1 20.2 20.1 Gas stop valve GLQ3 20.3 Legend Component name Compressor Oil separator High pressure switch High pressure sensor One way valve 4-way valve (ST1) Heat exchanger EEVD Electronic expansion valve (EEVA) GLQ2 Radiator Stop valve (liquid side)
  • Page 85 印刷技术要求 材质 封面，封底：105克铜版纸，内页：80g双胶纸 规格 210*297(双面) 颜色 黑白 其他 设计更改记录表 （仅做说明用，不做菲林） 涉及更改页面 版本升级 更改人 更改日期 更改主要内容 （印刷页码） 黄俊豪 2024.11.08 1、16章电控部分更改 P46-52 CA-MD24IU 2、2.6冷媒安全要求，修改为增强密闭系统和 P9-18 黄伟俊 -145B-EN 带风管系统的要求 P29、38、41-42 3、更改外机型号，分歧型号 版本基础上 4、删除重复故障代码 修改为美的 5、更新截断装置附图 6、全书单位统一为“英制（公制）”，法规 牌版本 引用的除外 1、修正错误的单词拼写 目录、P19、P65、P69 黄伟俊 2025.02.18 2、删除多余内容 P8、P15、P21、P75 3、排版错位内容...

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