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Summary of Contents for Midea MIH15Q4CHN18
- Page 1 Compact Four-Way Cassette Installation and Operation Manual Read this manual carefully before using the product, and keep it for future reference. All the pictures in this manual are for illustration purpose only.
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Page 3: Table Of Contents
Contents About The Documentation About This Document / 1 Safety Instructions / Safety Warning Safety Precautions / 4 Electric Safety Requirements / About The Refrigerant / Operation Operation Precautions / Optimum Operation / 10 Symptoms That Are Not Faults / 11 Display Panel / Disposal / 14 Installation... -
Page 4: About The Documentation
About The Documentation About This Document NOTE Make sure that the user has the printed documentation and ask him/her to keep it for future reference. Target audience Authorised installers + end users Note This appliance is intended to be used by expert or trained users in shops, in light industry, and on farms, or for commercial and household use by lay persons. -
Page 5: Safety Instructions
Safety Instructions Please thoroughly read and ensure that you fully understand the safety precautions (including the signs and symbols) in this manual, and follow relevant instructions during use to prevent damage to health or property. Safety Signs Indicates a hazard with a high level of risk which, if not avoided, will result in death or DANGER serious injury. - Page 6 DANGER Any person who is involved with working on or breaking into a refrigerant circuit should hold a current valid certificate from an industry-accredited assessment authority, which authorises their competence to handle refrigerants safely in accordance with an industry recognised assessment specification. Servicing shall only be performed as recommended by the equipment manufacturer.
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Page 7: Safety Warning
Safety Warning WARNING CONTENTS Ensure Proper Professional Only Earthing PROHIBITION SIGNS No Laying No Strong Currents No Open Flame; No Acid or Inflammable Thing Fire, Open Ignition Alkali Materials Source and Smoking Prohibited Safety Precautions DANGER In the event of refrigerant leakage, smoking and open flames are prohibited. Disconnect the main power switch immediately, open windows to allow ventilation, keep away from the leakage point, and contact your local dealer or technical support to request a professional repair. -
Page 8: Electric Safety Requirements
CAUTION This appliance is not intended for use by persons (including children) with reduced physical, sensory or mental capabilities, or lack of experience and knowledge, unless they have been given supervision or instruction concerning use of the appliance by a person responsible for their safety. Children should be supervised to ensure that they do not play with the appliance. -
Page 9: About The Refrigerant
About The Refrigerant WARNING The following applies to R32 refrigerant systems. Prior to beginning work on systems containing flammable refrigerants, safety checks are necessary to ensure that the risk of ignition is minimized. For repair to the refrigerating system, the following precautions shall be complied with prior to conducting work on the system. - Page 10 During repairs to sealed components, all electrical supplies shall be disconnected from the equipment being worked upon prior to any removal of sealed covers, etc. If it is absolutely necessary to have an electrical supply to equipment during servicing, then a permanently operating form of leak detection shall be located at the most critical point to warn of a potentially hazardous situation.
- Page 11 i) Do not exceed the maximum working pressure of the cylinder, even temporarily. j) When the cylinders have been filled correctly and the process completed, make sure that the cylinders and the equipment are removed from site promptly and all isolation valves on the equipment are closed off. k) Recovered refrigerant shall not be charged into another refrigeration system unless it has been cleaned and checked.
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Page 12: Operation
Operation Operation Precautions WARNING If the unit will be not used for a long time, disconnect the main power switch. Otherwise, an accident may occur. The installation height of the air conditioner shall be at least 2.5m above the ground to avoid the following risks: 1. -
Page 13: Optimum Operation
CAUTION To use the unit normally, please follow the "Operation" section in this manual. Otherwise, the internal protection may be triggered, the unit may begin to drip, or the unit's cooling and heating effects may be impacted. The room temperature should be set properly, especially when there are elderly, children, or patients in the room. -
Page 14: Symptoms That Are Not Faults
Operating Range Use the unit in the following temperature and humidity ranges for safe and effective operation. Indoor 16~32°C temperature ≤80% Cooling Indoor (When the humidity exceeds 80%, long-time operation of the indoor unit may cause humidity dew condensation on the surface of the indoor unit, generate mist-like cold air from the air outlet or water dripping out of the unit.) Indoor Heating... - Page 15 The Following Symptoms Are Not System Malfunctions The following phenomena are normal during operation of the air conditioner. They can be solved according to the instructions below or do not need to be solved. The indoor unit emits white mist ①...
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Page 16: Display Panel
In winter, the outdoor temperature is low, and heating effects may be decreased ① In heating mode, the air-conditioning system absorbs heat from the outdoor air and releases heat to the indoor side. When the outdoor temperature is low, less heat is released. -
Page 17: Disposal
Disposal Components and accessories from the units are not part of ordinary domestic waste. Complete units , compressors, motors etc. are only to be disposed of via qualified disposal specialists. This unit uses hydrofluorocarbon which is only be disposed of via qualified disposal specialists. -
Page 18: Installation
Installation Carefully read this manual before installing the indoor unit. Installation Precautions WARNING Make sure to carry out the installation according to local legislation. Ask your local dealer or professionals to install the product. This unit must be installed by pqualified persons. Users MAY NOT install the unit themselves; otherwise, faulty operations may cause the risks of fire, electrical shock, injury, or leakage, which could harm you or others or damage the air conditioner. - Page 19 Before and after installation, exposing the unit to water or moisture will cause electrical short circuit. Do not store the unit in a humid basement or expose it to rain or water. Make sure the installation base and lifting are robust and reliable; Insecure installation of the base may cause the air conditioner to fall, leading to an accident.
- Page 20 Precautions For Transporting And Lifting The Air Conditioner Before transporting the air conditioner, determine the path that will be used to move it to the installation site. Do not unpack the air conditioner until it is transported to the installation site. When unpacking and moving the air conditioner, must hold the Lifting Lugs and do not apply force to other parts, especially the refrigerant piping, drain pipe and plastic accessories, so as to avoid damaging the air conditioner and causing personal injury.
- Page 21 Keep the air-conditioning return air away from direct exposure to the sun in the room. The indoor unit should not be lifted in the places like load-bearing beams and columns that affect the structural safety of the house. The wired controller and the indoor unit should be in the same installation space; otherwise, the sampling point setting of the wired controller needs to be changed.
- Page 22 Layout Installation layout 1 Indoor unit 2 Panel (optional) 3 Air outlet 5 Fresh air inlet 6 Liquid pipe 4 Expanded outlet 7 Gas pipe 8 Drain pipes 9 *Connection wires 10 Wired controller (optional) 11 Remote controller (optional) 12 Electric control box 13 Access hole 14 *Power cable and earth wires 15 *Communication wiring...
- Page 23 Product Dimensions (Unit: mm) Φ22.2 Φ22.2 Φ125 6-M4 Φ170 Φ170 6-M4 6-M4 620 (with panel) Φ23 (internal diameter) Drain pipe Φ25 (outer diameter) Capacity (kW) A: Connect to refrigerant piping (liquid side) B: Connect to refrigerant piping (gas side) Φ6.35 Φ12.7 kW≤5.6 5.6<kW≤6.3...
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Page 24: Installation Materials
Installation Materials Accessories List of accessories Installation And Operation Flare Nut X 2 Cable Tie X 4 Thermal Insulation Pipe X 2 Manual X 1 For use in the installation of To tighten the drain hose tightly to Used for insulation and (Make sure to hand it over to the connecting pipe (the quantity is the drainage outlet and PVC... - Page 25 Connecting pipe (Unit: mm) Piping Liquid side Gas side Capacity(kW) kW≤5.6 Φ6.35×0.75 Φ12.7×0.75 5.6<kW≤6.3 Φ9.52×0.75 Φ15.9×1.0 For connection of the indoor unit refrigerant system, it is recommended to use a soft copper tube (T2M), with the length selected according to the Remarks actual situation.
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Page 26: Preparations Before Installation
Preparations Before Installation Unpacking Check After unpacking, check whether the packing materials are in good ① The red condition, whether the accessories that come with the product are dot bulges Sealing complete, whether the air conditioner is intact, whether the surfaces of the heat exchanger and other parts are not worn, and whether there are oil stains on the stop valves of the unit. - Page 27 Determine The Positions Of The Ceiling Opening, The Unit And The Suspension Bolts Cut a hole with a size of 590mm x 590mm. (Unit: mm) 4-Φ12 Shape cutting of the mounting cardboard 378±1 530±1 (Suspension bolt distance) Φ20 (Middle opening Φ12) 575±1 (Indoor unit size) 590 (Ceiling opening dimension) NOTE...
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Page 28: Indoor Unit Installation
If Necessary, Cut Out The Required Openings For Installation On The Ceiling (Where There Is An Existing Ceiling). (Unit: mm) For the dimensions of ceiling openings, refer to the following figure. Connect to drain pipe Suspension bolt Connect to refrigerant piping (liquid side) Hexagon nut Connect to refrigerant piping... - Page 29 Installation Of Suspension Bolts CAUTION High-quality carbon steel bolts (galvanized or with other anti-rust paint applied) or stainless steel bolts are used. How the ceiling is treated will differ with the type of building. For specific measures, please consult the building and renovation engineers.
- Page 30 Existing ceiling (the ceiling surface needs to be level) Cut a 590mm × 590mm square hole on the ceiling according to the shape of the mounting cardboard (see the figure below). a. The center of the ceiling opening is the same as the center of the indoor unit of the air conditioner. b.
- Page 31 After adjusting the indoor unit position and level, tighten the nuts on the mounting hook to secure the air conditioner in place. Tighten the upper and lower nuts For units with fresh air functions, before installing indoor units: 1. Use diagonal pliers to remove the knockout at the fresh air unit at one side of the unit in advance.
- Page 32 New rooms and new ceilings For the installation of lifting bolts, a hook can be embedded in the new room. Make sure the hook can withstand 4 times the weight of the indoor unit and will not loosen due to shrinkage of the concrete. After the indoor unit is lifted, fix the mounting cardboard on the air conditioner unit with M5×20 screws (panel) to predetermine the size and position of the ceiling opening.
- Page 33 Remove the air inlet grille Press the two grille clamps at the same time to lift the grille. Auxiliary buckle Display panel Air inlet grille (inner) Grille clamp Louver Decoration panel NOTE Do not position the panel so that it faces downwards or leans against the wall. Do not place it on a protruding object either.
- Page 34 Make sure the two hooks are well secured. Panel hook (two) Tighten the screws under the panel hooks until the thickness of the sealing sponges 1 and 2 between the indoor unit and the panel outlet is reduced to about 4-6mm. The edge of the panel should be in good contact with the ceiling.
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Page 35: Refrigerant Connecting Piping Installation
Install the air inlet grille Refer to the wiring nameplate located on the cover of the unit’s electric control box, and connect the exposed wires of the panel to the corresponding interface of the unit's electric control. A safety hang rope is reserved for the suction grille. Please install the hanging rope into the hang rope slot. Install the air inlet grille back into the corresponding position, and push it up slightly at the grille clamp position to ensure that the grille buckle is fully engaged in the slot of the panel, and the grille is in the closed position. - Page 36 Pipe Layout ① The deformed pipe area must not exceed 15% . ② A protective sleeve should be installed at the wall or floor hole. ③ The weld joint must not be inside the insulation. ④ The drill hole on the external wall must be sealed. ≥...
- Page 37 Brazing pipes When brazing pipes, fill the pipes with nitrogen. CAUTION When it is necessary to fill the piping with nitrogen during brazing, the pressure must be kept at 0.02MPa using a pressure relief valve. Do not use flux when brazing the piping. Use a phosphor copper that does not require flux. Do not use any antioxidants when brazing the piping.
- Page 38 Nut fastening Connect the indoor unit first, then connect the outdoor unit.Before tightening the flare nut, apply refrigeration oil on the inner and outer surface of the pipe flare (must use refrigeration oil compatible with the refrigerant for this model), and turn it 3 or 4 turns by hand to tighten it.When connecting or removing a pipe, use two wrenches at the same time.
- Page 39 Refrigerant Piping Fixing Angle iron brackets or round steel hangers should be used for fixing. When the liquid pipe and gas pipe are suspended together, the size of the liquid pipe shall prevail. Pipe outer diameter (mm) ≤20 20~40 ≥40 Horizontal pipe distance (m) Stand pipe distance (m) Vacuum Pumping...
- Page 40 CAUTION Under no circumstances shall potential sources of ignition be used in the searching for or detection of refrigerant leaks. A halide torch (or any other detector using a naked flame) shall not be used. Leak detection fluids are suitable for use with most refrigerants but the use of detergents containing chlorine shall be avoided as the chlorine may react with the refrigerant and corrode the copper pipe-work.
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Page 41: Drain Pipe Installation
Drain Pipe Installation CAUTION Before installation of the drain pipe, determine its direction and elevation to avoid intersection with other pipelines to ensure that the slope is straight. The highest point of the drain pipe should be equipped with a vent port to ensure the smooth drainage of condensate water, and the vent port must face downwards to prevent dirt from entering the pipe. - Page 42 The water pump connecting pipe and drain pipe (in the indoor part) must be wrapped with heat insulation pipe evenly and bound with cable ties to prevent air from entering and producing condensate. Cable tie Drain pipe Thermal insulation pipe To prevent water from flowing back into the air conditioner when it stops running, the drain pipe should be inclined downward to the outdoor side (drainage side), with a downward slope of 1/100 or above.
- Page 43 The end of the drain pipe must be more than 50mm above the ground or from the base of the water drainage slot. In addition, do not submerge it in water. To drain the condensed water directly into a ditch, the water drain pipe must bend upwards to form a U-shaped water plug to stop odors from entering the room via the water drain pipe.
- Page 44 Water Drainage Test Before the test, make sure that the water discharge piping is smooth, and check that each connection is properly sealed. Conduct the water drainage test in a new room before the ceiling is plastered. The drain pipe can be made of PVC pipe (outer diameter: 25mm). Based on the actual installation circumstances, users can purchase pipes of appropriate lengths from a sales agent or the local after-sales service center, or purchase them directly from the market.
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Page 45: Electrical Connection
Electrical Connection DANGER The power supply must be cut off before any electrical work is carried out. Do not conduct electrical work when the power is on; otherwise, it may cause serious personal injury. The air conditioning unit must be earthed reliably and must meet the requirements of the local country/region. - Page 46 Electrical Characteristics Electric Specifications Of The Indoor Unit Indoor Fan Motor Capacity Frequency Voltage Rated Motor Output (kW) (Hz) 0.46 0.46 0.54 50/60 220~240 0.54 0.61 0.65 0.81 NOTES: MCA: Min. Circuit Amps. (A), which is used to select the minimum circuit size to ensure safe operation over a long period of time.
- Page 47 CAUTION All weak point connection points meet SELV, such as X1, X2, P, Q, E, M1, M2, CN18, CN55 etc. Wiring Open the indoor unit's electric control box cover. ① Remove the two screws at the positions shown in the figure; ②...
- Page 48 Power supply cable connection ① Connection between the power supply cable and power supply terminal Main control board The power supply terminal of the indoor unit is fixed on the main control board, the power supply cable is connected to the power supply terminal labeled "CN1"...
- Page 49 ② Power supply cable system connection Power supply cable system connection depends on the methods of communication between the indoor unit and outdoor unit. For the HyperLink (M1M2) communication method, indoor units are allowed to have independent power supplies. For other communication methods, indoor units should be provided with uniform power supplies. Indoor units are provided with independent power supplies*, which are wired as follows: For HyperLink (M1M2) communication with independent power supply: Master...
- Page 50 Indoor units are provided with unified power supply*, which are wired as follows: 1. HyperLink (M1M2) communication with the unified power supply: Power supply for indoor unit L1+La+Ln ≤ 2000m Wire diameter: 0.75mm2 Communication wires × × Circuit breaker Power supply cable Distribution box Distribution box Master...
- Page 51 CAUTION When the indoor units are provided with a unified power supply, if the indoor units in the same refrigerant system are V8 indoor units, then indoor units and outdoor unit can communicate either via HyperLink (M1M2) with a unified power supply, or via P/Q. If some of the indoor units in the same refrigerant system are non-V8 series, then indoor units and outdoor unit can only communicate via P/Q/E communication.
- Page 52 Communication wiring connection ① Selection of communication method for indoor units Equipped with independently developed HyperLink (M1M2) communication, V8 series indoor units also preserve the previous RS-485 (PQE) communication method. They are compatible with non-V8 indoor units. Pay attention to the type of indoor unit before connecting communication wiring. Please refer to the following table to select an appropriate communication method.
- Page 53 CAUTION Please select the communication wiring according to the requirements in the above reference table. Use shielded cables for communication when strong magnetism or interference is present. On-site wiring must comply with the relevant regulations of the local country/region and must be completed by professionals.
- Page 54 ③ Indoor unit and outdoor unit communication HyperLink (M1M2) communication (with independent power supply) Single unit: HyperLink (M1M2) communication is a new type of indoor unit and outdoor unit communication technology. When the indoor units are provided with independent power supplies, use 2×1.5mm2 communication cables.
- Page 55 CAUTION If the total length is less than or equal to 200m and the total number of indoor units is less than or equals to 10 sets, the electronic expansion valve in indoor unit can be powered and controlled by the master outdoor unit.
- Page 56 System: The HyperLink (M1M2) communication wiring with a unified power supply between indoor unit and outdoor unit can reach a length of up to 2000 meters, supporting any topology connection. The following figure shows a serial connection: Power supply for indoor unit Communication wires ×...
- Page 57 System: The maximum total length of the P/Q communication cable of the Indoor unit and outdoor unit can be up to 1200m, and can be connected in serial, as shown in the figure below: Power supply for indoor unit × × Communication wires Circuit breaker Power supply cable...
- Page 58 CAUTION When P/Q or P/Q/E communication is used, the indoor units need to be powered uniformly. Either P/Q, P/Q/E communication or HyperLink (M1M2) communication can be selected. If it is required for indoor units to have independent power supplies, then HyperLink (M1M2) communication must be selected.
- Page 59 ⑤ D1D2 communication wiring connection (limited to outdoor unit and system configuration) Achieving one-to-multiple and two-to-multiple functions of the indoor unit wired controller through D1D2 communication (a maximum of 16 sets) D1D2 communication is 485 communication. The one-to-more and two-to-more functions of the indoor unit wired controller can be achieved through D1D2 communication, as shown in the figure below: Indoor unit 2# Indoor unit 16#...
- Page 60 External board connection (limited to outdoor unit and system configuration) The external boards are connection module outside the main control board, including a display box, Switch module, 1# Expansion board and 2# Expansion board. ① Connection of Display Panel The display panel is connected to the main control board through a 4-core cable, and is connected to the "CN30"...
- Page 61 Alarm signal and Sterilization module Refer to the following figure for the wiring of alarm signal and Sterilization module. Main CAUTION CN22 control board Output voltage: 220 VAC; The output voltage is 220-240V~. Maximum output power: 220 W Strong current sterilization module Alarm signal output Output voltage: 220 VAC;...
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Page 62: Error Codes
Error Codes Error Codes And Definitions The error code is displayed on the display box and the wired controller display. Definition Error code Digital display Emergency stop DANGER R32 refrigerant leaks, requiring shutdown immediately Outdoor unit fault Interlocking control Heat Recovery Ventilation Unit fault( in-series application) The Humidity Unit fault Interlocking control Heat Recovery Ventilation Unit fault（non-serial application) The AHU Kit slave unit fault... - Page 63 Definition Error code Digital display Abnormal communication between the indoor unit main control board and fan drive board Abnormal communication between the indoor unit and wired controller Abnormal communication between the indoor unit and Wi-Fi Kit Abnormal communication between the indoor unit main control board and display board Abnormal communication between the AHU Kit slave unit and master unit Number of AHU Kits is not the same as the set number Abnormal communication between the linked humidifying indoor unit and master indoor unit...
- Page 64 Definition Error code Digital display The built-in room temperature sensor of the wired controller short-circuits or cuts off The wireless temperature sensor short-circuits or cuts off The external room temperature sensor short-circuits or cuts off Tcp (pre-cooled fresh air temperature sensor) short-circuits or cuts off Tph (pre-heated fresh air temperature sensor) short-circuits or cuts off TA (outlet air temperature sensor) short-circuits or cuts off Outlet air humidity sensor fault...
- Page 65 Definition Error code Digital display Motor failed more than once IPM (fan module) overcurrent protection Instantaneous overcurrent protection for phase current Low bus voltage fault High bus voltage fault Phase current sample bias error Motor and indoor unit are unmatched IPM and indoor unit are unmatched Motor startup failure Motor blocking protection...
- Page 66 CAUTION Error codes are displayed only for certain outdoor unit models and indoor unit configurations (including the wired controller and display box). When the main control program is being upgraded, make sure that the indoor unit and outdoor unit remain powered on.
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Page 67: Settings
Settings ESP Setting Use the bi-directional communication wired controller (for example, WDC3-86S) to set the unit external static pressure: Constant speed mode The bi-directional communication wired controller must be used to set the unit external static pressure parameters to overcome the air outlet resistance. The steps are as follows: ①... - Page 68 Static pressure setting parameter table Unit power Static pressure settings W*100 Level 0 Level 1 Level 2 Level 3 Level 4 Level 5 Level 6 Level 7-19 15 (0.6HP) 22 (0.8HP) 28 (1.0HP) 36 (1.2HP) 45 (1.7HP) 56 (2.0HP) 63 (2.2HP) NOTE Parameters can be set while the unit is powered on or powered off.
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Page 69: Test Run
Test Run Checklist Before Test Run After the installation of the unit, check the items listed below first. CAUTION Do not power on the system. Pass/Fail Check list Read the complete installation and operation manual. Installation Check that the units are properly installed, to avoid abnormal noises and vibrations when starting up the units. Compressor and others shipping brackets removed. - Page 70 Pass/Fail Check list Components damage Check for damaged components and extruded piping inside the unit. Consistency Check between Refrigeration Pipelines and Communication Lines Check and confirm that the refrigerant piping and communication lines connected to the indoor and outdoor units are belong to the same refrigeration system.
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Page 71: Safety Warning
Maintenance And Service Safety Warning WARNING For safety reasons, always turn off the air conditioner and turn off the power before cleaning the air conditioner. Do not disassemble or repair the air conditioner by yourself; otherwise, it may cause fire or other hazards. Only professional service personnel can carry out the maintenance. - Page 72 Procedure Remove the air inlet grille. Press the grille clamp with two fingers at the same time,and pull out the air inlet grille in a downward direction. Flip the grille clamp to the center. Remove the filter. NOTE Only authorised installer or service agent can change and disassemble the filter. Any improper operations may cause electric shock or injuries due to touching rotating parts.
- Page 73 Cleaning Air Outlets And Exterior Panels Wipe the air outlet and panel with a dry cloth. If a stain is hard to remove, clean it with clean water or neutral detergent. CAUTION Do not use gasoline, benzene, volatile agents, decontamination powder or liquid insecticides. Otherwise, the air outlet or panel may become discolored or deformed.
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Page 74: Service
Service Step To Dismantle The Electric Control Board Remove the main control board. Open the electric control box cover. Unplug the terminals on the main control board and Remove the two screws at the positions shown in the remove the screws at the positions shown in the figure. figure, and pull out the bottom end of the electric control box cover horizontally. - Page 75 Open the electric control box cover and untie the cable Remove the sealing plate assembly. tie. Remove the screws at the position shown in the figure, remove the sealing plate assembly, and loosen the wire binding sponge at the outlet. Screw (two) Electric control box cover Screw (three)
- Page 76 Step To Dismantle The Evaporator Unplug the corresponding terminals on the main control board. Follow the steps above to remove the panel and drain pan. Remove the sealing plate assembly. After removing one fixing screw, remove the evaporator fixing board. Remove the screws fixing the evaporator and the pump bracket in place, and remove the evaporator.
- Page 77 Step To Dismantle The Water Pump Unplug the water pump terminal on the main control board. Follow the steps above to remove the panel and drain pan. Unplug the drain pipe. After removing the two fixing screws, the pump can be Remove the screws fixing the water pump and the taken out for replacement or maintenance.
- Page 78 Multi-languages 16126000006807 V.E...
- Page 79 技术要求，此页不做菲林 封面封底为铜版纸105g ，内页为双胶纸80g 210*297mm，黑白印刷 整本说明书重新翻译 整本修改注意、危险、警告的图标，增加电控接线图 整本修改 P43增加电源线线径表...
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