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Installation and Owner's
Four-way Cassette 2nd generation
Original instructions
Thank you very much for purchasing our air conditioner.
Before using your air conditioner, please read this manual carefully and keep it for future
reference.
Manual
MI2-56Q4DN1
MI2-71Q4DN1
MI2-80Q4DN1
MI2-100Q4DN1
MI2-112Q4DN1
MI2-140Q4DN1
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Summary of Contents for Midea MI2-56Q4DN1
- Page 1 Installation and Owner's Manual Four-way Cassette 2nd generation MI2-56Q4DN1 MI2-71Q4DN1 MI2-80Q4DN1 MI2-100Q4DN1 MI2-112Q4DN1 MI2-140Q4DN1 Original instructions Thank you very much for purchasing our air conditioner. Before using your air conditioner, please read this manual carefully and keep it for future...
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Page 2: Table Of Contents
• Make sure the power cord, communication and controller wiring Contents are straight and level when you are working on the connections, and the cover on the electric box is tight. If the electric box is not 1. Before Installation ..............3 closed properly, it may lead to electric shock, fire or overheating of 2. - Page 3 Accessories Verify that the air conditioner includes the following accessories. Code Name Appearance Installation Manual Washer Installation board M6 screw Connecting pipe Insulation casing for copper pipe Foam (250x250x8) Foam (60x100x5) Insulation casing for water discharge piping Ring clamp for water discharge pipe Tightening band Soft flexible hose for water discharge Brass nut...
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Page 4: Before Installation
1. Before Installation 1. Determine the route to move the unit to the installation site. 2. First unseal and unpack the unit. Then, hold the seats of the hanger (4 pcs) to move the unit. Refrain from exerting force on other parts of the unit, especially the refrigerant piping, water discharge piping, and the plastic parts. 2. - Page 5 1. Drill 910x910mm square holes into the ceiling based on the layout of the Original concrete slab structure installation board (accessory 4). See Figure 3.5. T he centre of the ceiling opening should match the centre of the body of the indoor unit. Use embedded bolts, and pull bolts. D etermine the length and outlets of the connecting pipes, water discharge piping and the electrical wiring.
- Page 6 Air conditioner body Refrigerant piping vent (gas side D) Refrigerant piping vent (liquid side C) ϕ32 (outer diameter of water discharge pipe) Screw M6x12 Installation (accessory) board Figure 3.8 Caution • Before you install the indoor unit, make sure that you remove Top view the buffers used for transportation between the fan and the pipe socket (see Figure 3.9). If you run the unit without removing the buffers, you may damage the fan motor.
- Page 7 Drain pan hook Panel hook Piping side Drain side 45° Figure 3.13 Swing motor Hook Caution screw • Do not place the panel such that it faces downwards or leans Phillips against the wall. Do not place it on a protruding object either. screwdriver • D o not hit or squeeze the air deflector.
- Page 8 Distribution duct No gap allowed Distribution duct Distribution duct Figure 3.16 Φ75 The side with EXV cannot be connected with distribution duct. 1. First loosen the nut Distribution duct Fresh air Figure 3.22 2. Adjust the nut 9.0~14.0kW Size (mm) 2.8~8.0kW models models Figure 3.17 3.3.4 First hang the air inlet grille on the panel, and then connect the leads of the swing motor and display box to the corresponding connections on the unit body respectively.
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Page 9: Refrigerant Piping Installation
Before the socket cap is installed on the pipe socket, apply some refrigerant oil 4. Refrigerant Piping Installation on the socket (both inside and outside), and then rotate it three or four times before you tighten the cap. See Figure 4.3. 4.1 Length and Drop Height Requirements for the Piping Connections to the Indoor and Outdoor Units Apply refrigerant oil The length and drop height requirements for the refrigerant piping are different for different indoor and outdoor units. -
Page 10: Water Discharge Piping Installation
5.2 Water Discharge Test 5. Water Discharge Piping Installation 5.1. Water Discharge Piping Installation for Indoor Unit Before the test, make sure that the water discharge pipeline is smooth, 1. U se PVC pipes for the water discharge pipes (outer diameter: 37~39 mm, and check that each connection is sealed properly. inner diameter: 32 mm). Based on the actual installation circumstance, Conduct the water discharge test in the new room before the ceiling is ... - Page 11 Refer to Tables 6.1 and 6.2 for the specifications of the power cord 6.1 Power Cord Connection and communication wire. A wiring capacity that is too small will cause Use a dedicated power supply for the indoor unit that is different the electrical wiring to become too hot, and lead to accidents when from the power supply for the outdoor unit.
- Page 12 Outdoor (Connect the shielded end of the shielded wire to the unit electronic controller box sheet metal " " here) Signalling line between (PQE) outdoor units Connecting the shielded Display board layer of the shielded wire Indoor unit 1 (PQE) Indoor and outdoor units Communication wire Only the last indoor unit requires adding the build-out resistor at P and Q.
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Page 13: On-Site Configuration
7. On-site Configuration SW1_1 7.1 Capacity Settings Cooling mode temperature compensation is 0°C Set up the PCB board DIP switch on the indoor electric control box to cater to different uses. Once the settings are done, make sure you cut off Cooling mode temperature compensation is 2°C the main power switch again, and then switch the power on. If the power is not cut off and switched on again, the settings will not be executed. -
Page 14: Test Run
Once the installation is completed, please keep the manual properly for future reference. When this air conditioner is handed over to other users, make sure that the manual is included with the handover. Auto restart function enabled Warning Auto restart function disabled •... -
Page 15: Part Names
• D o not use the unit until the qualified technician instructs you that it is safe • Do not place the unit’s remote controller in direct sunlight. Direct sunlight to do so. can damage the remote controller’s display. • D o not place appliances that produce naked flames in the path of the airflow • Do not use strong chemical cleaners to clean the unit, as doing so can from the unit. The airflow from the unit may increase the rate of combustion, damage the unit’s display or other surfaces. -
Page 16: Air Conditioner Operations And Performance
Table: Display panel output under normal operating conditions. Display output Digital display panels Unit state Unit state Digital display Operation indicator Standby flashes slowly Shutting-down All indicators off Operation indicator Cooling and heating modes: set temperature Fan only Normal operation mode: indoor ambient temperature Operation Cold draft Operation and... -
Page 17: Adjusting Air Flow Direction
Method for cleaning the air filter a. The air filter can prevent the dust or other particles from entering the unit. If the filter is blocked, the unit will not work well. Clean the filter every two weeks when you use it regularly. b. If the air conditioner is positioned in a dusty place, clean the filter often. -
Page 18: Symptoms That Are Not Faults
14. Symptoms That Are Not Faults The following symptoms may be experienced during the normal operation of the unit and are not considered faults. Note: If you are not sure whether a fault has occurred, contact your supplier or service engineer immediately. - Page 19 15.2 Unit troubleshooting Symptom Possible causes Troubleshooting steps A power cut has occurred (the power to the Wait for the power to come back on. premises has been cut-off). Power on the unit. This indoor unit forms part of an air conditioning system that has multiple indoor units that are all connected.
- Page 20 15.3 Remote controller troubleshooting Warning: Certain troubleshooting steps that a professional technician may perform when investigating an error are described in this owner's manual for reference only. Do not attempt to undertake these steps yourself – arrange for a professional technician to investigate the problem. If any of the following errors occur, power the unit off and contact a professional technician immediately.
- Page 21 15.4 Error codes With the exception of a mode conflict error, contact your supplier or service engineer if any of the error codes listed in the following table are displayed on the unit's display panel. If the mode conflict error is displayed and persists, contact your supplier or service engineer. These errors should only be investigated by a professional technician. The descriptions are provided in this manual for reference only. Content Digital display output Possible causes T he indoor unit’s operating mode conflicts with that of the outdoor Mode conflict units. C ommunication wires between indoor and outdoor units not ...
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