Midea MI2-100Q4DHN1 Installation And Operation Manual Download Page 1

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Four-way Cassette

The 2nd generation DC VRF indoor unit

Installation and Operation Manual

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.

Summary of Contents for MI2-100Q4DHN1

Page 1: ...ion DC VRF indoor unit Installation and Operation Manual 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 ...

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Page 3: ...s and wires Improper wiring and installation may cause a fire Make sure the power cord communication and controller wiring 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 closed properly it may lead to electric shock fire or overheating of electrical components If the refrigerant leaks during installation open the...

Page 4: ...ontent the mechanical parts will experience accelerated ageing which will severely compromise the service life of the unit 5 Where there are major voltage fluctuations Operating the unit using a power supply system that has large voltage fluctuations will reduce the service life of the electronic components and cause the unit s controller system to malfunction 6 Where there is a risk of leakage of...

Page 5: ...39 mm inner diameter 32 mm The inner diameter is based on the diameter of the copper and PVC pipes The thickness of the pipe casing is 10 mm or more Increase the thickness of the casing 20 mm or thicker when the temperature exceeds 30 C or the humidity exceeds RH80 To purchase based on actual project requirements Use to connect indoor refrigerant piping Use to discharge condensed water from the in...

Page 6: ...ections for the installation site See Figure 2 3 for the schematic on the direction of airflow If part of the air vent must be blocked you may insert an air baffle at the vent of the unit body to block the air flow See Figure 2 4 2 Choosing an Installation Site Figure 2 1 Panel Ceiling 910 mm ceiling hole position Air inlet Air outlet Air outlet Floor Connect to water piping outlet Figure 2 2 Conn...

Page 7: ...or mounting and drill four Φ12mm X 50 55 mm holes Then embed and set up the expansion hook anchors purchased accessory 4 in these holes See Figure 3 2 During the installation of the hooks purchased accessory 5 make sure that the concave portion of the hanger corresponds to that of the expansion hook anchors Determine the appropriate hook length for installation based on the ceiling s height Remove...

Page 8: ... Buffers Dimensions of unit ϕ75 fresh air vent Refrigerant piping vent liquid side C Refrigerant piping vent gas side D ϕ32 outer diameter of water discharge pipe Figure 3 10 Figure 3 11 Mounting hooks Master air conditioner Ceiling Panel Hex nut to adjust level All the figures in this manual are for illustration purposes only The actual air conditioner you purchased may not have the same appearan...

Page 9: ...ective casing to wrap the connection terminals and use a reliable fixture to secure and strengthen the safety isolation of the terminals 4 Adjust the four panel hook screws see Figure 3 15 c to keep the panel level and lift it evenly up to the ceiling 5 Adjust the panel slightly in the d direction see Figure 3 15 d so that the centre of the panel aligns with the centre of the opening of the ceilin...

Page 10: ... for the schematic on the installation dimensions of the air ducts Figure 3 22 See Figure 3 23 for the schematic on the air duct installation Figure 3 23 If only one air duct is connected The air volume in the air duct for the 5 6 8 0 kW model is about 300 360 m3 h The air volume in the air duct for the 9 0 14 0 kW models is about 400 640 m3 h Length of the air duct should not exceed 2 m If two ai...

Page 11: ...ssive torque will damage the socket cap and the cap will not be tight if you apply insufficient torque leading to leakages 4 5 Air Tightness Test Carry out the air tightness test on the system according to the instructions in the installation manual of the outdoor unit 4 7 Vacuum Create a vacuum in the system according to the instructions in the installation manual of the outdoor unit 4 8 Refriger...

Page 12: ... plugged to prevent water from leaking 5 Water Discharge Piping Installation 5 1 Water Discharge Piping Installation for Indoor Unit 1 Use PVC pipes for the water discharge pipes outer diameter 37 39 mm inner diameter 32 mm Based on the actual installation circumstance users can purchase the appropriate piping length from sales agent or local after sales service centre or purchase directly from th...

Page 13: ...connect the power cord firmly To prevent the cord from being pulled out by external force make sure it is fixed securely Figure 6 2 shows the power supply terminal of the indoor unit Refer to Tables 6 1 and 6 2 for the specifications of the power cord and communication wire A wiring capacity that is too small will cause the electrical wiring to become too hot and lead to accidents when the unit bu...

Page 14: ...adding the build out resistor at P and Q open Indoor and outdoor units Communication wire Connecting the shielded layer of the shielded wire Connect the shielded end of the shielded wire to the electronic controller box sheet metal here Signalling line between outdoor units Outdoor unit P Q Figure 6 6 The X1 X2 D1 D2 ports on the sides of the main control board and the unidirectional communication...

Page 15: ...unit in the system are not controlled by the centralized controller Caution The system can connect up to 64 indoor units address 0 63 at the same time Each indoor unit can only have one address DIP switch in the system The addresses of any two indoor units in the same system cannot be the same Units that have the same address may malfunction 0 1 definition of each dial code switch means 0 means 1 ...

Page 16: ...ad to electric shocks or injuries caused by moving parts such as the unit s fan Ensure that the power supply is disconnected before any servicing or maintenance is carried out Do not touch the unit or its remote controller with wet hands as doing so can lead to electric shocks Do not allow children to play near this unit as doing so risks injury Do not insert your fingers or other objects into the...

Page 17: ...igerant oil and other materials is adhered to Contact your local waste disposal authority for information about disposal procedures To avoid damaging the remote controller exercise caution when using it and replacing its batteries Do not place objects on top of it Do not place appliances that have naked flames under or near the unit as heat from the appliance can damage the unit Do not place the u...

Page 18: ...an air filters inside indoor units Caution The unit performs stably in the temperature range given in above table If the indoor temperature is outside the unit s normal operating range it may stop running and display an error code 16 Cooling mode Heating mode 17 32 C DB 15 27 C DB Indoor temperature Indoor humidity a Condensation will form on the unit surface and water dripping out of the unit whe...

Page 19: ...ell 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 c Replace the filter if it is too dusty to clean the replaceable air filter is an optional fitting 1 Take out the air intake grille Push the grille switches simultaneously as indicated in Fig 13 1 Then pull down the air intake grille together with the air fi...

Page 20: ...t will start after the intentional delay is complete Heating mode is running when the following panel lights are on operation and the DEF FAN LED indicator Cause the indoor unit activates protective measures because of the low outlet temperature Caution When the power switch is connected some energy will be consumed even if the unit is not running Disconnect the power to save energy A degree of di...

Page 21: ...s air inlet or outlet is blocked A refrigerant leak has occurred Low heating effect Doors or windows are not completely closed Close doors and windows Arrange for a professional technician to check the following A refrigerant leak has occurred 15 2 Unit troubleshooting A power cut has occurred the power to the premises has been cut off Air flows normally but doesn t cool The unit starts or stops f...

Page 22: ... button is pressed Check whether the MODE indicated on the display is AUTO Check whether the MODE indicated on the display is DRY A power cut has occurred the power to the premises has been cut off Check whether the timer operation has come to an end when TIMER OFF is indicated on the display Check whether the timer operation has come to an end when TIMER ON is indicated on the display Check wheth...

Page 23: ...oil error Line loosened or broken The electronic expansion valve in stuck Outdoor unit error Water level float stuck Water level switch not connected properly Damaged main PCB Drain pump has malfunctioned 6 E 7 E b E error M O R P E E d E r o r r e t i n u r o o d t u O E E r o r r e l e v e l r e t a W FE Indoor unit has not been assigned an address Communication error between indoor and outdoor ...

Page 24: ...16126000002969 V G ...

Page 25: ...改前后核对和检查 B版本升级到C版本更新整本说明书 C版本升级到D版本 P12添加线径说明 D版本升级到E版本 P12页删除图6 10 X1 X2接地 P12页6 3所有屏蔽线接地要求转移到6 3 1 E版本升级到F版本 P11表6 3 Cable for fixed wiring中的 and 为 to 图号升级 P16室内机制热温度增加下限技术要求双胶纸80克黑白印刷 A4 V F V G 更改材质为80g 其余不变 ...

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