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Related Manuals for Midea MSF3-07CRN2
Summary of Contents for Midea MSF3-07CRN2
- Page 1 Cover MSF3-07CRN2; MSF3-07HRN2 MSF3-09CRN2; MSF3-09HRN2(AAC-09ESCH) MSF3-12CRN2; MSF3-12HRN2(AAC-12ESCH)
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Page 2: Table Of Contents
Air purging of the piping and indoor unit ....................14 Pumping down (Re-installation) ......................15 Re-air purging (Re-installation) ......................16 Balance refrigerant of the 2-way, 3-way valves .................17 Evacuation ............................18 Gas charging............................19 Pressure table ..........................20 MSF3-07CRN2 ..........................20 MSF3-07HRN2 ..........................20 MSF3-09CRN2 ..........................21 MSF3-09HRN2 ..........................21 MSF3-12CRN2 ..........................22 MSF3-12HRN2 ..........................22 Capacity table ...........................23 10.1... - Page 3 Content 10.5 MSF3-12CRN2 ..........................26 10.6 MSF3-12HRN2 ..........................26 Electronic function ..........................28 11.1 Proper symbols and their meaning ....................28 11.2 Function .............................28 11.3 Protection ............................28 11.4 Fan-only mode ...........................29 11.5 Cooling mode .............................29 11.6 Dehumidifying mode ..........................30 11.7 Heating mode.............................31 11.8 Defrosting mode(available for heating mode)..................32 11.9 Auto mode............................33 11.10...
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Page 4: Precaution
Service manual 1. Precaution 1.1 Safety 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 Warning Installation Do not use a defective or underrated circuit... - Page 5 Service manual the unit is so equipped.) Operational There is risk of physical injury, electric shock, or product failure. Do not expose the skin directly to cool air for long When the product is soaked (flooded or periods of time. (Do not sit in the draft). submerged), contact an Authorized service center.
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Page 6: Function
Service manual 2. Function Indoor unit Operation ON/OFF by remote controller Sensing by room temperature Room temperature sensor. Pipe temperature sensor. Room temperature control Maintain the room temperature in accordance with the setting temperature. Starting temperature control Indoor fan is delayed for 5 sec at the starting. Time Delay Safety control Restarting is for approx. - Page 7 Service manual Outdoor unit Power relay control The unit has 3 mins delay between continuously ON/OFF operations. Low noise air flow system Bird tail propeller fan makes the outdoor unit run more quietly. Hydrophilic aluminum fin The hydrophilic fin can improve the heating efficiency at operation mode. 4 way valve control It is only operated in the heating operation mode except defrosting operation.
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Page 8: Dimension
Service manual 3. Dimension 3.1 Indoor unit Dimension Mode 3.2 Outdoor unit Dimension Mode... -
Page 9: Specification
Service manual 4. Specification Model MSF3-07CRN2 MSF3-07HRN2 MSF3-09CRN2 MSF3-09HRN2 Power supply Ph-V-Hz 1, 220-240V~, 50Hz 1, 220-240V~, 50Hz 1, 220-240V~, 50Hz 1, 220-240V~, 50Hz Capacity Btu/h 7000 7000 9000 9000 Input 1000 1000 Cooling Rated current Btu/w.h 9.0,2.6 9.0,2.6 9.0,2.6 9.0,2.6... - Page 10 Service manual Model MSF3-12CRN2 MSF3-12HRN2 Power supply Ph-V-Hz 220-240V~,50HZ 220-240V~,50HZ Cooling Capacity Btu/h 12000 12000 Input 1350 1350 Rated current Btu/w.h 8.9, 2.6 8.9, 2.6 Heating Capacity Btu/h ----- 14000 Input ----- 1420 Rated current ----- ----- Moisture Removal Max. input consumption 1800 1800 Max.
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Page 11: Refrigerant Cycle Diagram
Service manual 5. Refrigerant cycle diagram Cooling only Heat pump mode... -
Page 12: Operation Limits
Service manual 6. Operation limits 6.1 Cooling operation Outdoor unit air temp.℃ DB Indoor air temp. ℃ DB Note: The chart is the result from the continuous operation under constant air temperature conditions. However, excludes the initial pull-down stage. 6.2 Heating operation Indoor air temp. -
Page 13: Schematic Diagram And Wiring Diagram
Service manual 7. Schematic diagram and Wiring diagram 7.1. Schematic diagram... -
Page 14: Wiring Diagram
Service manual 7.2. Wiring diagram MSF3-07CRN2, MSF3-09CRN2, MSF3-12CRN2... - Page 15 Service manual MSF3-07HRN2, MSF3-09HRN2, MSF3-12HRN2...
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Page 16: Installation Details
Service manual 8. Installation details Wrench torque sheet for installation Outside diameter Torque inch Kg.m φ6.35 φ9.52 φ12.7 Connecting the cables The power cord of connect should be selected according to the following specifications sheet. Grade Unit Pipe length and the elevation Max. -
Page 17: Air Purging Of The Piping And Indoor Unit
Service manual Air purging of the piping and indoor unit Required tools: Hexagonal wrench; adjustable wrench; torque wrenches, wrench to hold the joints and gas leak detector. Note: The air in the indoor unit and in the piping must be purged. If air remains in the refrigeration piping, it will affect the compressor, reduce the cooling capacity, and could lead to a malfunction of unit. -
Page 18: Pumping Down (Re-Installation)
Service manual Pumping down (Re-installation) Procedure 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. Operate the unit for 10 to 15 minutes. -
Page 19: Re-Air Purging (Re-Installation)
Service manual Re-air purging (Re-installation) Procedure: Confirm that both the 2-way and 3-way valves are set to the closed position. 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. Air purging. -
Page 20: Balance Refrigerant Of The 2-Way, 3-Way Valves
Service manual Balance refrigerant of the 2-way, 3-way valves Procedure: Confirm that both the 2-way and 3-way valves are set to the open position. Connect the charge set to the 3-way valve’s service port. Leave the valve on the charge set closed. Connect the charge hose with the push pin to the service port. -
Page 21: Evacuation
Service manual Evacuation Procedure: Connect the vacuum pump to the charge set’s centre hose. Evacuation for approximately one hour. Confirm that the gauge needle has moved toward -0.1 Mpa (-76 cmHg) [vacuum of 4 mmHg or less]. Close the valve (Low side) on the charge set, turn off the vacuum pump, and confirm that the gauge needle does not move (approximately 5 minutes after turning off the vacuum pump). -
Page 22: Gas Charging
Service manual 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. 2. Purge the air from the charge hose. Open the valve at the bottom of the cylinder and press the check valve on the charge set to purge the air (be careful of the liquid refrigerant). -
Page 23: Pressure Table
Service manual 9. Pressure table Note: The pressure data is from 3 way valve, the pressure data are pressure above atmosphere. D: Dry bulb temp. W: Wet bulb temp. 9.1 MSF3-07CRN2 Cooling mode Outdoor temperature (Dry bulb temp) Indoor Pressure 25ºC 30ºC... -
Page 24: Msf3-09Crn2
Service manual 9.3 MSF3-09CRN2 Cooling mode Outdoor temperature (Dry bulb temp) Indoor Pressure 25ºC 30ºC 35ºC 40ºC 45ºC 50ºC Conditions 21ºC D Pressure 10.0 15ºC W ( kg/cm 24ºC D Pressure 10.1 17ºC W ( kg/cm 27ºC D Pressure 10.2 10.8 19ºC W ( kg/cm... -
Page 25: Msf3-12Crn2
Service manual 9.5 MSF3-12CRN2 Cooling mode Outdoor temperature (Dry bulb temp) Indoor Pressure 25ºC 30ºC 35ºC 40ºC 45ºC 50ºC Conditions 21ºC D Pressure 15ºC W ( kg/cm 24ºC D Pressure 10.0 10.4 17ºC W ( kg/cm 27ºC D Pressure 10.3 10.9 19ºC W ( kg/cm... -
Page 26: Capacity Table
Service manual 10. Capacity table 10.1 MSF3-07CRN2 SUMMER OUTDOOR TEMPERATURE DRY Indoor 25ºC 30ºC 35ºC 40ºC 45ºC 50ºC Conditions Total capacity kW 1.92 1.82 1.69 1.54 1.41 1.31 21ºC D Sensitive capacity kW 1.44 1.39 1.34 1.27 1.20 1.15 15ºC W Input kW. -
Page 27: Msf3-09Crn2
Service manual WINTER OUTDOOR CONDITIONS 12ºC D 7ºC D 4ºC D 0ºC D -4ºC D -7ºC D Indoor Conditions 11ºC W 6ºC W 3ºC W -1ºC W -6ºC W -8ºC W Capacity kW 2.89 2.59 2.41 1.54 1.31 1.27 15ºC Input kW. -
Page 28: Msf3-09Hrn2
Service manual 10.4 MSF3-09HRN2 SUMMER OUTDOOR TEMPERATURE DRY Indoor 25ºC 30ºC 35ºC 40ºC 45ºC 50ºC Conditions Total capacity kW 2.44 2.32 2.16 1.98 1.82 1.70 21ºC D Sensitive capacity kW 1.68 1.63 1.56 1.48 1.40 1.34 15ºC W Input kW. 0.87 0.95 1.02... -
Page 29: Msf3-12Crn2
Service manual 10.5 MSF3-12CRN2 SUMMER OUTDOOR TEMPERATURE DRY Indoor 25ºC 30ºC 35ºC 40ºC 45ºC 50ºC Conditions Total capacity kW 3.31 3.14 2.92 2.68 2.45 2.28 21ºC D Sensitive capacity kW 2.53 2.28 2.18 2.07 1.96 1.88 15ºC W Input kW. 1.11 1.21 1.32... - Page 30 Service manual WINTER OUTDOOR CONDITIONS 12ºC D 7ºC D 4ºC D 0ºC D -4ºC D -7ºC D Indoor Conditions 11ºC W 6ºC W 3ºC W -1ºC W -6ºC W -8ºC W Capacity kW 4.77 4.24 3.74 2.41 2.00 1.93 15ºC Input kW.
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Page 31: Electronic Function
Service manual 11. Electronic function 11.1 Proper symbols and their meaning TA: Indoor ambient temperature TE: Indoor evaporator temperature TS: Setting temperature through the remote controller : Self-protection amp of compressor, continue three seconds until turns off the compressor. 3sec : Self-protection amp of compressor, continue five minutes until turns off the compressor. -
Page 32: Fan-Only Mode
Service manual 11.3.5 The current protection of the compressor Current down I 3sec Compressor turn off (after 5 seconds later) I 5min Current up Compressor turn off (after 5 minute later) I fan The outdoor fan turn off (heating) I restore The outdoor fan turn Indoor fan: On low speed (cooling) -
Page 33: Dehumidifying Mode
Service manual Auto fan at cooling mode: High fan Mid. fan Room temp. down Room temp. up Low fan T-Ts Anti-freezing control to indoor evaporator at cooling mode ( T: evaporator temp. ) Compressor and outdoor fan on EVAP. temp. down EVAP. -
Page 34: Heating Mode
Service manual 11.6.4 At dehumidifying mode, the anti-freezing function of the indoor heat exchanger is the same as that of cooling mode. 11.6.5 At dehumidifying mode, the action of fans of indoor is the same as that of air-only mode. 11.7 Heating mode 11.7.1 Generally, the 4-way valve is open in heating mode, but it is closed in defrosting mode. -
Page 35: Defrosting Mode(Available For Heating Mode)
Service manual 11.7.5 Auto wind at heating mode (T=indoor temp.) 11.7.6 Indoor evaporator high-temperature protection at heating mode (T=indoor exchanger temp.) Compressor off Fan off Compressor on Fan off T temp. down T temp. up Compressor on Fan on 11.7.7 The louver opens to Standard Angle ANGLHEAT when power is on for the first time 11.8 Defrosting mode(available for heating mode) 11.8.1 Defrosting condition: Defrosting starts when either of the following ①&②... -
Page 36: Auto Mode
Service manual 11.8.2 Defrosting time At condition ①, If item B is satisfied before item A, it would be regarded as severe frosting and the defrosting time is 10 minutes. If item B is satisfied after item A, the defrosting time is 7.5minutes. At condition ②, the defrosting time is 10 minutes. -
Page 37: Force Cooling Function
Service manual 11.10 Force cooling function 11.10.1 Select forced cooling function with the forced cooling button or the switch 11.10.2 The compressor is unconditionally turned on, after 30 minutes cooling operation whose fan mode is set as low, the A/C operates at the DRY mode with a set temp. of 24℃ 11.10.3 All protections of remote control cooling are available at forced cooling operation 11.10.4... -
Page 38: Model And Parameters
Service manual 12. Model and Parameters Model MSF3-07CR MSF3-07HR MSF3-09CR MSF3-09HR MSF3-12CR MSF3-12HR I3SEC 7.5A 7.5A 10.0A 10.0A 12.0A 12.0A I5MIN 6.2A 6.2A 7.5A 7.5A 8.5A 8.5A IFAN 5.2A 5.2A 5.5A 5.5A 7.5A 7.5A IRESTOR 4.2A 4.2A 4.5A 4.5A 6.5A 6.5A IDEFROST 3.2A... -
Page 39: Troubleshooting
Service manual 13. Troubleshooting Display board 13.1 Operation The indicator flashes once every second after power is on and illuminates when the air conditioner is in operation. Timer indicator: The indicator illuminates then TIMER is set ON. PRE-DEF. indicator (For cooling & heating mode only) The air conditioner starts defrosting automatically if outdoor unit frosts in heating operating. -
Page 40: Troubleshooting
Service manual Troubleshooting 13.2 For cooling mode: Operation Timer Failure phenomenon lamp lamp Indoor fan speed has been out of control for over 1 minute ☆ Indoor room temp. or evaporator sensor is open circuit or short circuit ☆ Over current protection of the compressor occurs 4 times ☆... -
Page 41: Diagnostic Chart
Service manual Diagnostic chart 13.3 After energizing, no indicator is lighted and the air conditioner can’t be operated. -
Page 42: Resetting Phenomenon Often Occurs During Operation
Service manual Resetting phenomenon often occurs during operation. 13.4 (That is automatically entering to the status when power is on.) The reason is that the instantaneous voltage of main chip is less than 4.5V. Check according to the following procedure: Operation lamp flashes and Timer lamp off. -
Page 43: Operation Lamp Off And Timer Lamp Flashes
Service manual Operation lamp off and Timer lamp flashes 13.7 Operation lamp on and Timer lamp flashes 13.8 EEROM error, indoor PCB is defective. Operation lamp flashes, Timer lamp flashes . 13.9 This is alarm signal when the main chip can’t detect over-zero signal. When such failure occurs, the main control board must have fault. -
Page 44: Characteristic Of Temperature Sensor
Service manual 14. 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...
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