Related Manuals for MDV MFS2i-24ARN1
Summary of Contents for MDV MFS2i-24ARN1
-
Page 1: Service Manual
SERVICE MANUAL MIDEA AIRCONDITIONER FLOOR STANDING TYPE Model: MFS2i-24ARN1 MFS2i-48ARN1... -
Page 2: Table Of Contents
2.2 Outdoor Unit ..........................4 3． Refrigerant cycle diagram ....................5 3.1Heat pump mode ......................... 5 4 . Wiring diagram ........................6 4.1 MFS2i-24ARN1 .......................... 6 4.2 MFS2i-48ARN1 ........................7 5．Installation details ........................8 5.1 Installation place ......................... 8 5.2 Installing ............................. 9 5.3 Refrigerant pipe connection ..................... - Page 3 Other Functions ........................30 9.Characteristic of temperature sensor ................... 31 10.Trouble shooting ........................31 10.1 Protective Function ......................31 10.2 Self-diagnosis ........................33 10.3 LEDs for the indication of outdoor trouble ................33 10.4 Troubles and Solutions ......................34...
-
Page 4: Safety Precautions
1. Safety Precautions 1.1 Precaution To prevent injury to the user or other people and property damage, the following instructions must be followed. Incorrect operation due to ignoring instruction will cause harm or damage. Before service unit, be sure to read this service manual at first. 1.2 Installation For electrical work, contact the dealer, seller, a qualified electrician, or an Authorized service center. -
Page 5: Operational
1.4 Operational Do not expose the skin directly to cool air for long periods of time. (Do not sit in the draft). Do not use the product for special purposes, such as preserving foods, works of art, etc. It is a consumer air conditioner, not a precision refrigerant system. -
Page 6: Dimension
2. Dimension 2.1 Indoor Unit Dimension W(mm) D(mm) H(mm) Mode MFS2i-24ARN1 1665 MFS2i-48ARN1 1775... -
Page 7: Outdoor Unit
2.2 Outdoor Unit Dimension W(mm) D(mm) H(mm) W1(mm) A(mm) B(mm) Mode MFS2i-24ARN1 Dimension W(mm) D(mm) H(mm) W1(mm) A(mm) B(mm) Mode MFS2i-48ARN1 1075... -
Page 8: Refrigerant Cycle Diagram
3． Refrigerant cycle diagram 3.1Heat pump mode... -
Page 9: Wiring Diagram
4 . Wiring diagram 4.1 MFS2i-24ARN1 Indoor Unit Outdoor Unit... -
Page 10: Mfs2I-48Arn1
4.2 MFS2i-48ARN1 Indoor Unit Outdoor Unit... -
Page 11: Installation Details
5．Installation details 5.1 Installation place 5.1.1 Indoor Unit a. A place which provides the spaces around the indoor unit as required above in the diagram. b. A place where is no obstacle near the inlet and outlet area. c. A place which can bear the weight of the indoor unit. d. -
Page 12: Installing
Caution: Installation in the following places may cause trouble. If it is unavoidable to use in such places, please consult with the dealer. a. A place full of machine oil. b. A saline place such as coast. c. Hot-spring resort. d. - Page 13 2. Dismounting the air-inlet grid Please take off the air-inlet grid before connecting the pipes/wires. Pull down the two knobs on the grid, take off the two screws, then the air-inlet grid goes free. 3. Take the Pipe Clip off before connecting the pipes and wiring; fit it when these finished. Use accessories to connect the pipes/wires on both sides and back side.
- Page 14 4. Be sure the electric insulation work is well done if installed on metal ceiling / wall. 5. Fix the unit feet with bolts (M10/M8). Be sure the unit is fixed strongly enough to against blast or earthquake. 6. Make a concrete basement to the unit by the following references. Dimension A(mm) B(mm) Mode MFS2i-24ARN1 MFS2i-48ARN1...
-
Page 15: Refrigerant Pipe Connection
5.3 Refrigerant pipe connection 5.3.1 Pipe length and the elevation The correct refrigerant quantity filled in the 5-meter-long pipe of the outdoor unit is marked on the Product Data Plate. If you have to use longer pipe for every meter plus pipe, the refrigerant should be added according to the following calculation. - Page 16 Only the correctly installing of indoor and outdoor unit done, can the refrigerant pipe be connected. The cut-off valves are completely close before ex-work. Before connecting the refrigerant pipe, be careful to check whether the valves are completely close. The connecting procedure of refrigerant pipe: first, unscrew the two valves on the outdoor unit and the pipe-jointing nut on the indoor unit(please keep them care fully).
- Page 17 Notes for the bendable pipe a. The bendable pipe should be used on the indoor side; b. Bend angel may not exceed 90 degrees; c. The bend location should be made on the center of the pipe if possible, as for bend radius, the bigger the better;...
- Page 18 refrigerant oil; 2.Check and make sure there is no leakage by soap-water or leakage-checker after connecting; 3.Be sure the connecting joint on the indoor side is insulated. 4.Use two wrenches to connecting the pipes. Additional Outside diameter Torque tightening torque inch N.cm N.cm...
- Page 19 5.3.3 Air purging with vacuum pump Air and moisture in the refrigerant system have undesirable effects as below: ● Pressure in the system rises. ● Operating current rises. ● Cooling or heating efficiency drops. ● Moisture in the refrigerant circuit may freeze and block capillary tubing. ●...
- Page 20 nut of the Lo valve on the gas pipe side and check the air is entering. (Operation noise of the vacuum pump changes and a compound meter indicates 0 stead of minutes) 5. After the evacuation is complete, fully close the handle Lo valve of the manifold valve and stop the operation of the vacuum pump.
- Page 21 Procedure 1. Confirm that both the 2-way and 3-way valves are set to the opened position. Remove the valve stem caps and confirm that the valve stems are in the opened position. Be sure to use a hexagonal wrench to operate the valve stems. 2.
- Page 22 5.3.5 Re-air purging (Re-installation) Procedure: 1. Confirm that both the 2-way and 3-way valves are set to the closed position. 2. Connect the charge set and a charging cylinder to the service port of the 3-way valve. Leave the valve on the charging cylinder closed. 3.
- Page 23 Close the valve on the charging cylinder and discharge the refrigerant until the gauge indicates 0.3 to 0.5 Mpa. 6. Disconnect the charge set and the charging cylinder, and set the 2-way and 3-way valves to the open position. Be sure to use a hexagonal wrench to operate the valve stems. 7.
- Page 24 3. Open the valves (Low side) on the charge set and discharge the refrigerant until the gauge indicates 0.05 to 0.1Mpa. If there is no air in the refrigeration cycle [the pressure when the air conditioner is not running is higher than 0.1Mpa, discharge the refrigerant until the gauge indicates 0.05 to 0.1 Mpa.
- Page 25 4. Disconnect the charge hose from the vacuum pump. Vacuum pump oil, if the vacuum pump oil becomes dirty or depleted, replenish as needle. 5.3.8 Gas charging Procedure: 1. Connect the charge hose to the charging cylinder. Connect the charge hose which you disconnected from the vacuum pump to the valve at the bottom of the cylinder.If the refrigerant is R410A, make the cylinder bottom up to ensure liquid charge.
-
Page 26: Drain Pipe Of The Indoor Unit
refrigerant. If the system cannot be charge with the specified amount of refrigerant, if can be charged with a little at a time (approximately 150g each time0 while operating the air conditioner in the cooling cycle; however, one time is not sufficient, wait approximately 1 minute and then repeat the procedure.(pumping down-pin). -
Page 27: Wiring
5.5 Wiring Please refer to the Wiring Diagram. Note: The power supply of the air conditioner is different according to the models. Please refer to the WIRING DIAGRAM pasted on the indoor and outdoor units before wire connection. 5.6 TEST RUN Perform test operation after completing gas leak and electrical safety check. -
Page 28: External View And Display
6．External view and display 6.1 External view This unit consists of indoor unit and outdoor unit. Note: The above air conditioner's outer shape is based on the standard model, so it may be different from the one you purchased. Air Outlet Let the conditioned air go out from it. -
Page 29: Control Panel
6.2 CONTROL PANEL Control Buttons and Functions 7.Operation characteristics Mode Cooling Drying Heating operation operation operation Temperature Room temperature 17℃~32℃ 17℃~30℃ 17℃~32℃ Outdoor temperature 18℃~43℃ -7℃~24℃ 18℃~ 43℃ CAUTION: 1. If air conditioner is used outside of the above conditions, certain safety protection features may come into operation and cause the unit to function abnormally. -
Page 30: Electronic Function
8.Electronic function 8.1 Main data Introduction Ts : Set temperature, T1 : Room temperature T2: Evaporator pipe temperature T3: Condenser pipe temperature T4: Outdoor ambient temperature 8.2 Operation Modes and Functions 8.2.1Manual Operation 8.2.2 Heating Mode 8.2.2.1 Four-way valve opens at once , while defrosting process closes. 8.2.2.2 Condition for the compressor action: (Ts=set temperature, T1=room temperature) Condition Compressor and outdoor fan... - Page 31 list 1: Condition Indoor fan speed T2<25°C Room temperature up 25°C <T2<32°C T2>32°C Set fan speed Room temperature down T2>22°C Set fan speed 22°C >T2>20°C T2<20°C 8.2.3 Defrost (only available to heating mode) 8.2.3.1 Defrosting Conditions Starting Of Defrosting Condition (meet one of the following is ok): (1)Accumulated time when temperature of outdoor heat exchanger coil T3 is below 3°C reaches to 40 minutes, then consecutive 3 minutes less than -5 degrees (Just for AC is turn on , whether or not the heating mode the temperature was detected,...
- Page 32 8.2.3.3 Ending Of Defrosting Condition (meet one of the following is ok): (1)Time of defrosting lasts 10 minutes. (2) Temperature of outdoor coil T3 is up to 8°C and continues to 80 seconds. (3) Temperature of outdoor coil T3 is up to 15°C. 8.2.4 Cooling Mode 8.2.4.1 Four-way valve is closed.
-
Page 33: Other Functions
8.2.5 Dehumidifying Mode 8.2.5.1 Indoor fan speed is low. 8.2.5.2 Four-way valve is closed,. the compressor and outdoor fan will operate the same as in cooling mode. 8.2.6 Auto Mode 8.2.6.1. Under auto mode, the indoor fan is set to be auto and the temperature is 24°C. 8.2.6.2 When entering auto mode, the heating, fan only or cooling operation will be automatically chosen according to the room temperature T1 and the set temperature Ts. -
Page 34: Characteristic Of Temperature Sensor
9.Characteristic of temperature sensor Temp. ℃ Resistance KΩ Temp. ℃ Resistance KΩ Temp. ℃ Resistance KΩ 62.2756 14.6181 4.3874 58.7079 13.918 4.2126 56.3694 13.2631 4.0459 52.2438 12.6431 3.8867 49.3161 12.0561 3.7348 46.5725 11.5 3.5896 10.9731 3.451 41.5878 10.4736 3.3185 39.8239 3.1918 37.1988 9.5507... - Page 35 Condition Outdoor fan Compressor T2>56°C Room temperature up T2>62°C Room temperature down T2>50°C T2<50°C 10.1.3 Evaporator Protection against low temperature 10.1.3.1 Only available under cooling and dehumidifying status. 10.1.3.2 Protection principle: Condition Outdoor fan Compressor T2≤2°C（last 3 minutes） T2≥8°C 10.1.3.3 The restart of the compressor shall execute the delay protection. 10.1.4 Condenser high temperature protection 10.1.4.1 Only available to cooling and dehumidifying mode.
-
Page 36: Self-Diagnosis
10.2 Self-diagnosis Codes Contents Protection of temperature of indoor evaporator Protection of temperature of outdoor condenser Defrosting or anti-cold air Open-circuit and short-circuit of indoor temperature sensors T1 Temp. sensor T2 on indoor evaporator is open circuit or short circuit The condenser temperature sensor T3 is open or short Protection of outdoor unit 10.3... -
Page 37: Troubles And Solutions
10.4 Troubles and Solutions Before calling for service, please review the following list of common problems and solutions. Problem Possible Cause Solutions Air conditioner Power failure Wait for power restoring does not The power supply is disconnected. Switch on the main power operate at all switch The power fuse is blown. - Page 38 The following displays indicate an error or problem(24K): Number Display Problems What to do code E1 E2 Temperature Sensor is off or Contact service people short-circuit. The temperature of the evaporator The temperature of the of indoor unit is too low or high (For evaporator of indoor unit is protection feature,...
- Page 39 The following displays indicate an error or problem(48K): Number Display Problems What to do code E1 E2 Temperature Sensor is off or Contact service people short-circuit. Outdoor unit protection Contact service people The temperature of the evaporator The temperature of the of indoor unit is too low or high (For evaporator of indoor unit is protection...
Need help?
Do you have a question about the MFS2i-24ARN1 and is the answer not in the manual?
Questions and answers