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Related Manuals for Midea MSG-05CR
Summary of Contents for Midea MSG-05CR
- Page 1 MSG-05CR MSG-07CR; MSG-07HR MSG-09CR; MSG-09HR MSG-12CR; MSG-12HR MSG-16CR; MSG-16HR MSG-18CR; MSG-18HR MSG-21CR; MSG-21HR...
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Page 3: Table Of Contents
Pumping down (Re-installation)....................23 Re-air purging (Re-installation)....................24 Balance refrigerant of the 2-way, 3-way valves................25 Evacuation ..........................26 Gas charging ..........................27 Capacity table......................28 MSG-05CR ..........................28 MSG-07CR ..........................28 MSG-07HR ..........................28 MSG-09CR ..........................29 MSG-09HR ..........................29 MSG-12CR ..........................30 MSG-12HR .......................... - Page 4 Content Electronic function.....................34 10.1 Electronic control working environment..................34 10.2 Proper symbols and their meaning..................... 34 10.3 Function ............................34 10.4 Protection............................ 35 10.5 Fan-only mode..........................35 10.6 Cooling mode..........................35 10.7 Dehumidifying mode........................36 10.8 Heating mode ..........................37 10.9 Defrosting mode(available for heating mode) ................
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Page 5: Precaution
Service manual 1. Precaution Safety Precaution n To prevent injury to the user or other people and property damage, the following instructions must be followed. n Incorrect operation due to ignoring instruction will cause harm or damage. n Before service unit, be sure to read this service manual at first. Warning Ø... - Page 6 Service manual unit is so equipped.) Ø Operational There is risk of physical injury, electric shock, or product failure. n Do not expose the skin directly to cool air for long n When the product is soaked (flooded or submerged), periods of time.
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Page 7: 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 8 Service manual Outdoor unit Power relay control The unit has 3 mins delay between continuously ON/OFF operations. Low ambient kit The unit can operate in cooling mode at low ambient temperature conditions. 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.
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Page 9: Dimension
Service manual 3. Dimension 3.1 Indoor unit Dimension Mode - 5 -... -
Page 10: Outdoor Unit
Service manual 3.2 Outdoor unit Dimension Mode - 6 -... -
Page 11: Specification
Service manual 4. Specification Model MSG-05CR MSG-07CR MSG-07HR Power supply Ph-V-Hz 1, 220-240V~,50Hz 1, 220-240V~,50Hz 1, 220-240V~,50Hz Capacity Btu/h 5000 7000 7000 Input Cooling Rated current Btu/w.h ----- ----- Capacity Btu/h 7600 Input ----- ----- Heating Rated current ----- -----... - Page 12 Service manual Model MSG-09CR MSG-09HR MSG-12CR Power supply Ph-V-Hz 1, 220-240V~,50Hz 1, 220-240V~,50Hz 1, 220-240V~,50Hz Capacity Btu/h 9000 9000 12000 Input 1230 Cooling Rated current Btu/w.h Capacity Btu/h ----- 10000 ----- ----- ----- Input Heating ----- ----- Rated current ----- 10.2 ----- Max.
- Page 13 Service manual Model MSG-12HR MSG-16CR MSG-16HR Power supply Ph-V-Hz 1, 220-240V~,50Hz 220-240V~,50Hz 220-240V~,50Hz Capacity Btu/h 12000 16000 16000 1620 1600 Input 1230 Cooling Rated current 10.0,2.9 Btu/w.h ----- 17500 Capacity Btu/h 13000 Input 1290 ----- 1650 Heating Rated current ----- ----- Max.
- Page 14 Service manual Model MSG-18CR MSG-18HR MSG-21CR Power supply Ph-V-Hz 1, 220-240V~,50Hz 1, 220-240V~,50Hz 1, 220-240V~,50Hz Capacity Btu/h 18000 18000 21000 Input 1930 1920 2300 Cooling Rated current 10.5 9.1, 2.7 Btu/w.h Capacity Btu/h 20000 ----- ----- Input 1980 Heating ----- Rated current 10.1 -----...
- Page 15 Service manual Model MSG-21HR Power supply Ph-V-Hz 1, 220-240V~,50Hz Capacity Btu/h 21000 Input 2300 Cooling Rated current 10.5 Btu/w.h 9.1, 2.7 Capacity Btu/h 23500 Input 2400 Heating Rated current Max. current 14.5 Starting current Model 2V36S225AUD Type rotary Brand Matsushita Capacity Btu/h 20600...
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Page 16: Refrigerant Cycle Diagram
Service manual 5. Refrigerant cycle diagram Ø Cooling only Ø Heat pump mode - 12 -... -
Page 17: 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 18 Service manual However, excludes the initial pull-down stage. - 14 -...
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Page 19: Schematic Diagram And Wiring Diagram
Service manual 7. Schematic diagram and Wiring diagram Schematic diagram - 15 -... -
Page 20: Wiring Diagram
Service manual Wiring diagram 7.2.1 Cooling mode MSG-05CR, MSG-07CR, MSG-09CR, MSG-12CR I N D O O R U N I T O U TD O O R U N I T 1 2( N ) Y＆G BLAC K BLAC K... - Page 21 Service manual MSG-16CR I N D O O R U N I T O U TD O O R U N I T 1 2( N ) Y＆G BLAC K BLAC K O VER LO AD R ELAY R ED R ED BLAC K C O M PR ESSO R...
- Page 22 Service manual MSG-18CR, MSG-21CR C O M PR ESSO R R ELAY TR AN SFO R M ER B LU E W H I TE B R O W N S W I TC H B O A R D C N 14 C N 9 C N 4...
- Page 23 Service manual 7.2.2 MSG-07HR, MSG-09HR, MSG-12HR - 19 -...
- Page 24 Service manual MSG-16HR, MSG-18HR, MSG-21HR - 20 -...
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Page 25: Installation Details
Service manual 8. Installation details Wrench torque sheet for installation Outside diameter Torque inch Kg.m φ6.35 φ9.52 φ12.7 φ15.88 φ19.05 Connecting the cables The power cord of connect should be selected according to the following specifications sheet. Grade Unit Pipe length and the elevation Standard Max. -
Page 26: 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 27: Pumping Down (Re-Installation)
Service manual Pumping down (Re-installation) 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 28: Re-Air Purging (Re-Installation)
Service manual 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 29: Balance Refrigerant Of The 2-Way, 3-Way Valves
Service manual Balance refrigerant of the 2-way, 3-way valves Procedure: 1. Confirm that both the 2-way and 3-way valves are set to the open position. 2. Connect the charge set to the 3-way valve’s service port. § Leave the valve on the charge set closed. §... -
Page 30: Evacuation
Service manual Evacuation Procedure: 1. Connect the vacuum pump to the charge set’s centre hose. 2. Evacuation for approximately one hour. § Confirm that the gauge needle has moved toward -0.1 Mpa (-76 cmHg) [vacuum of 4 mmHg or less]. 3. -
Page 31: 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. §... -
Page 32: Capacity Table
Service manual 9. Capacity table MSG-05CR SUMMER Cooling mode OUTDOOR TEMPERATURE DRY Indoor 25ºC 30ºC 35ºC 40ºC 45ºC 50ºC Conditions 21ºC D Total capacity kW 1.41 1.33 1.23 1.13 1.06 0.98 15ºC W Sensitive capacity kW 1.03 0.99 0.93 0.86 0.81... -
Page 33: Msg-09Cr
Service manual OUTDOOR CONDITIONS WINTER Indoor 12ºC D 7ºC D 4ºC D 0ºC D -4ºC D -7ºC D Conditions 11ºC W 6ºC W 3ºC W -1ºC W -6ºC W -8ºC W 2.62 2.30 2.10 1.85 1.59 1.40 Capacity kW 15ºC Input kW. -
Page 34: Msg-12Cr
Service manual MSG-12CR OUTDOOR TEMPERATURE DRY SUMMER Cooling mode Indoor 25ºC 30ºC 35ºC 40ºC 45ºC 50ºC Conditions 21ºC D Total capacity kW 3.36 3.16 2.93 2.69 2.52 2.33 15ºC W Sensitive capacity kW 2.46 2.36 2.21 2.05 1.92 1.80 Input kW. 1.05 1.11 1.16... -
Page 35: Msg-16Cr
Service manual MSG-16CR OUTDOOR TEMPERATURE DRY SUMMER Cooling mode Indoor 25ºC 30ºC 35ºC 40ºC 45ºC 50ºC Conditions 21ºC D Total capacity kW 4.52 4.24 3.93 3.61 3.38 3.14 15ºC W Sensitive capacity kW 3.30 3.17 2.97 2.75 2.58 2.41 Input kW. 1.37 1.44 1.50... -
Page 36: Msg-18Cr
Service manual 9.10 MSG-18CR OUTDOOR TEMPERATURE DRY SUMMER Cooling mode Indoor 25ºC 30ºC 35ºC 40ºC 45ºC 50ºC Conditions 21ºC D Total capacity kW 5.08 4.77 4.41 4.06 3.80 3.52 15ºC W Sensitive capacity kW 3.71 3.56 3.33 3.09 2.90 2.71 Input kW. -
Page 37: Msg-21Cr
Service manual 9.12 MSG-21CR OUTDOOR TEMPERATURE DRY SUMMER Cooling mode Indoor 25ºC 30ºC 35ºC 40ºC 45ºC 50ºC Conditions 21ºC D Total capacity kW 5.92 5.56 5.15 4.74 4.43 4.11 15ºC W Sensitive capacity kW 4.32 4.15 3.89 3.60 3.38 3.16 Input kW. -
Page 38: Electronic Function
Service manual 10. Electronic function (Just for the 5K, 7K, 9K, 12K, 16K, 18K cooling and heating mode) 10.1 Electronic control working environment Input voltage: 175~253V Input power frequency:50HZ Ambient temperature: -7°C+43°C Indoor fan normal working amp is less than 1A Outdoor fan normal working amp is less than 1.5A Four-way valve normal working amp is less than 1A Swing motor: DC12V... -
Page 39: Protection
Service manual Anti frozen at cooling mode 10.4 Protection 10.4.1 3 minutes delay at restart for compressor. 10.4.2 Sensor protection at open circuit and breaking disconnection 10.4.3 Fan Speed is out of control. When Indoor Fan Speed is too high(higher than High Fan+300RPM)or too low(lower than 400RPM), the unit stops and LED displays failure information and can’t returns to normal operation automatically. -
Page 40: Dehumidifying Mode
Service manual Auto fan at cooling mode: Anti-freezing control to indoor evaporator at cooling mode ( T: evaporator temp. ) 10.7 Dehumidifying mode 10.7.1 The 4-way valve is off in dehumidifying mode 10.7.2 Compressor and Indoor Fan actions in dehumidifying mode - 36 -... -
Page 41: Heating Mode
Service manual Indoor Block Compressor and Outdoor Fan ON 6minutes BREEZE OFF 4minutes ON 5minutes BREEZE OFF 5minutes ON 4minutes BREEZE OFF 6minutes Repeat on and off cycle. 10.7.3 Low room temperature protection: When room temperature decreases to below 10℃, compressor and outdoor fan will stop(indoor fan is Breeze). -
Page 42: Defrosting Mode(Available For Heating Mode)
Service manual 10.8.5 Auto wind at heating mode (T=indoor temp.) 10.8.6 Indoor evaporator high-temperature protection at heating mode (T=indoor exchanger temp.) 10.8.7 The louver opens to Standard Angle ANGLHEAT when power is on for the first time 10.9 Defrosting mode(available for heating mode) Defrosting condition: Defrosting starts when either of the following ①&②: ①... -
Page 43: Auto Mode
Service manual ② Calculate from the end of latest defrost, evaporator high temp. Protection only closes outdoor fan with the compressor still running. Add up to 90 minutes. 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. -
Page 44: Force Cooling Function
Service manual 10.10.2 The indoor fan blows automatically in corresponding selected mode 10.10.3 The motion of indoor fan’s blade should accord with the selected operation mode 10.10.4 One mode should be carried out for at least 15 minutes once selected. If the compressor cannot start for 15 minutes, reselect the operation mode according to the room temp. -
Page 45: Auto Restart Function
Service manual 10.12.4 Auto: After an hour running under economic mode, the set temp will rise 1℃,if it is under cooling mode; the set temp will decrease 1℃,if it is under heating mode; the set temp will be changeless, if it is under fan-only mode;... -
Page 46: Model And Parameters
Service manual 11. Model and Parameters Model MSG-05CR MSG-07CR MSG-07HR MSG-09CR MSG-09HR MSG-12CR MSG-12HR I3SEC [A] I5MIN [A] IFAN [A] IRESTORE [A] 4.5A IDEFROST [A] TE1 ['C] TE2 ['C] TE3 ['C] TE4 ['C] TE5 ['C] TE6 ['C] TE7 ['C] TE8 ['C]... -
Page 47: Troubleshooting
Service manual 12. Troubleshooting 12.1 Display board § 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 48: Troubleshooting
Service manual 12.2 Troubleshooting 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 49: Diagnostic Chart
Service manual 12.3 Diagnostic chart After energizing, no indicator is lighted and the air conditioner can’t be operated. - 45 -... -
Page 50: Resetting Phenomenon Often Occurs During Operation
Service manual 12.4 Resetting phenomenon often occurs during operation. (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: Resetting phenomenon often occurs during operation. -
Page 51: Operation Lamp Off And Timer Lamp Flashes
Service manual 12.7 Operation lamp off and Timer lamp flashes 12.8 Operation lamp on and Timer lamp flashes EEROM error, indoor PCB is defective. 12.9 Operation lamp flashes, Timer lamp flashes . 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 52: Characteristic Of Temperature Sensor
Service manual 13. 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...
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