Related Manuals for Midea MSG-07CRN2
Summary of Contents for Midea MSG-07CRN2
- Page 1 MSG-07CRN2; MSG-07HRN2 MSG-09CRN2; MSG-09HRN2 MSG-12CRN2; MSG-12HRN2 MSG-16CRN2; MSG-16HRN2 MSG-18CRN2; MSG-18HRN2 MSG-21CRN2; MSG-21HRN2...
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Page 3: Table Of Contents
Pumping down (Re-installation) ....................21 Re-air purging (Re-installation) ....................22 Balance refrigerant of the 2-way, 3-way valves................ 23 Evacuation ..........................24 Gas charging ........................... 25 Capacity table ......................26 MSG-07CRN2.......................... 26 MSG-07HRN2.......................... 26 MSG-09CRN2.......................... 27 MSG-09HRN2.......................... 27 MSG-12CRN2.......................... 28 MSG-12HRN2.......................... 28 MSG-16CRN2.......................... - Page 4 Content 10.2 Proper symbols and their meaning ..................32 10.3 Function ........................... 32 10.4 Protection..........................33 10.5 Fan-only mode......................... 33 10.6 Cooling mode........................... 33 10.7 Dehumidifying mode ........................ 34 10.8 Heating mode .......................... 35 10.9 Defrosting mode(available for heating mode) ................36 10.10 Auto mode ..........................
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Page 5: Precaution
Service manual 1. Precaution 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. Warning Installation Do not use a defective or underrated circuit breaker. - Page 6 Service manual 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 submerged), periods of time. (Do not sit in the draft). contact an Authorized service center.
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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-07CRN2 MSG-07HRN2 MSG-09CRN2 1, 220-240V~,50Hz 1, 220-240V~,50Hz 1, 220-240V~,50Hz Power supply Ph-V-Hz 7000 7000 Capacity Btu/h 9000 Input 1000 Cooling Rated current Btu/w.h 9.0,2.6 9.0,2.6 9.0,2.6 Capacity Btu/h ----- 8000 ----- Input ----- ----- Heating... - Page 12 Service manual Model MSG-09HRN2 MSG-12CRN2 MSG-12HRN2 Ph-V-Hz 1, 220-240V~,50Hz 1, 220-240V~,50Hz 1, 220-240V~,50Hz Power supply 12000 12000 Capacity Btu/h 9000 1330 1330 Input 1000 Cooling Rated current 9.0,2.6 9.0 ,2.6 9.0 ,2.6 Btu/w.h Capacity Btu/h 11000 ----- 14000 Input 1100 ----- 1400 Heating...
- Page 13 Service manual Model MSG-16CRN2 MSG-16HRN2 MSG18CRN2 Ph-V-Hz 1, 220-240V~,50Hz 220-240V~,50Hz 220-240V~,50Hz Power supply Capacity Btu/h 16000 16000 17000 Input 1810 1820 1890 Cooling Rated current Btu/w.h 8.8, 2.6 8.8, 2.6 9.0, 2.63 Capacity Btu/h 18000 Input 1660 Heating Rated current Max.
- Page 14 Service manual Model MSG-18HRN2 MSG-21CRN2 MSG-21HRN2 Ph-V-Hz 1, 220-240V~,50Hz 1, 220-240V~,50Hz 1, 220-240V~,50Hz Power supply 18000 18000 Capacity Btu/h 17000 2080 2080 Input 1890 Cooling Rated current 8.7, 2.54 8.7, 2.54 Btu/w.h 9.0, 2.63 Capacity Btu/h 19000 ----- 22000 Input 1900 ----- 2450...
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Page 15: Refrigerant Cycle Diagram
Service manual 5. Refrigerant cycle diagram Cooling only Heat pump mode - 11 -... -
Page 16: 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 17: Schematic Diagram And Wiring Diagram
Service manual 7. Schematic diagram and Wiring diagram Schematic diagram - 13 -... -
Page 18: Wiring Diagram
Service manual Wiring diagram 7.2.1 Cooling mode MSG-07CR, MSG-09CR, MSG-12CR INDOOR UNIT O U T D O O R U N I T 1 2 ( N ) Y＆G B L A C K B L A C K O V E R L O A D R E L A Y R E D R E D... - Page 19 Service manual MSG-16CR INDOOR UNIT O U T D O O R U N I T 1 2 ( N ) Y＆G B L A C K B L A C K O V E R L O A D R E L A Y R E D R E D...
- Page 20 Service manual MSG-18CR, MSG-21CR COMPRESSOR RELAY TRANSFORMER BLUE WHITE BROWN SWITCH BOARD CN14 CURRENT DETECTOR CN10 INDOOR MOTOR INDOOR UNIT O U T D O O R U N I T 1 2 ( N ) Y＆G B L A C K B L A C K O V E R L O A D R E L A Y...
- Page 21 Service manual 7.2.2 MSG-07HR, MSG-09HR, MSG-12HR - 17 -...
- Page 22 Service manual MSG-16HR, MSG-18HR, MSG-21HR - 18 -...
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Page 23: 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 24: 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 25: 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 26: 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 27: 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. Connect the charge hose with the push pin to the service port. -
Page 28: 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. 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 29: 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 30: Capacity Table
Service manual 9. Capacity table MSG-07CRN2 OUTDOOR TEMPERATURE DRY SUMMER Cooling mode Indoor 25ºC 30ºC 35ºC 40ºC 45ºC 50ºC Conditions 21ºC D Total capacity kW 1.97 1.85 1.71 1.58 1.47 1.37 15ºC W Sensitive capacity kW 1.44 1.38 1.29 1.20 1.13... -
Page 31: Msg-09Crn2
Service manual MSG-09CRN2 OUTDOOR TEMPERATURE DRY SUMMER Cooling mode Indoor 25ºC 30ºC 35ºC 40ºC 45ºC 50ºC Conditions 21ºC D Total capacity kW 2.50 2.35 2.17 2.00 1.87 1.73 15ºC W Sensitive capacity kW 1.82 1.75 1.64 1.52 1.43 1.34 Input kW. 0.86 0.90 0.94... -
Page 32: Msg-12Crn2
Service manual MSG-12CRN2 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. 1.14 1.20 1.25... -
Page 33: Msg-16Crn2
Service manual MSG-16CRN2 OUTDOOR TEMPERATURE DRY SUMMER Cooling mode Indoor 25ºC 30ºC 35ºC 40ºC 45ºC 50ºC Conditions 21ºC D Total capacity kW 4.50 4.23 3.91 3.60 3.36 3.12 15ºC W Sensitive capacity kW 3.28 3.15 2.95 2.74 2.57 2.40 Input kW. 1.56 1.64 1.71... -
Page 34: Msg-18Crn2
Service manual MSG-18CRN2 OUTDOOR TEMPERATURE DRY SUMMER Cooling mode Indoor 25ºC 30ºC 35ºC 40ºC 45ºC 50ºC Conditions 21ºC D Total capacity kW 4.79 4.50 4.16 3.83 3.58 3.32 15ºC W Sensitive capacity kW 3.50 3.35 3.14 2.91 2.74 2.56 Input kW. 1.62 1.71 1.78... -
Page 35: Msg-21Crn2
Service manual 9.11 MSG-21CRN2 OUTDOOR TEMPERATURE DRY SUMMER Cooling mode Indoor 25ºC 30ºC 35ºC 40ºC 45ºC 50ºC Conditions 21ºC D Total capacity kW 5.07 4.76 4.41 4.05 3.79 3.52 15ºC W Sensitive capacity kW 3.70 3.55 3.33 3.08 2.89 2.71 Input kW. -
Page 36: 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 37: 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 38: Dehumidifying Mode
Service manual Auto fan at cooling mode: Anti-freezing control to indoor evaporator at cooling mode ( T: evaporator temp. ) Compressor and outdoor fan on EVAP. temp. down EVAP. temp. up Compressor and outdoor fan off (after 5 mins) 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 TA-TS... -
Page 39: 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 40: 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 41: 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 42: 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 43: 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 44: Model And Parameters
Service manual 11. Model and Parameters Model MSG-07CR MSG-07HR MSG-09CR MSG-09HR MSG-12CR MSG-12HR I3SEC [A] I5MIN [A] IFAN [A] 4.5A IRESTORE [A] IDEFROST [A] TE1 ['C] TE2 ['C] TE3 ['C] TE4 ['C] TE5 ['C] TE6 ['C] TE7 ['C] TE8 ['C] TE9 ['C] ANGLCOOL ['] 200°... -
Page 45: 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 46: 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 47: Diagnostic Chart
Service manual 12.3 Diagnostic chart After energizing, no indicator is lighted and the air conditioner can’t be operated. - 43 -... -
Page 48: 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: 12.5 Operation lamp flashes and Timer lamp off. -
Page 49: 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 50: 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 3.1918 37.1988 9.5507...
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