Midea MSG-24CR Service Manual
  1. Manuals
  2. Brands
  3. Midea Manuals
  4. Air Conditioner
  5. MSG-24CR
  6. Service manual

Midea MSG-24CR Service Manual

Room airconfitioner split wall-mounted type
Hide thumbs Also See for MSG-24CR:
Table of Contents

Advertisement

Quick Links

See also: Manual
MSG-24CR; MSG-24HR
MSG-30CR; MSG-30HR
MSG-36CR; MSG-36HR

Advertisement

Table of Contents
loading

Related Manuals for Midea MSG-24CR

Summary of Contents for Midea MSG-24CR

  • Page 1 MSG-24CR; MSG-24HR MSG-30CR; MSG-30HR MSG-36CR; MSG-36HR...

  • Page 3: Table Of Contents

    Pumping down (Re-installation)....................26 Re-air purging (Re-installation)....................27 Balance refrigerant of the 2-way, 3-way valves................28 Evacuation ..........................29 Gas charging ..........................30 Capacity table......................31 MSG-24CR ..........................31 MSG-24HR ..........................31 MSG-30CR ..........................32 MSG-30HR ..........................32 MSG-36CR ..........................33 MSG-36HR ..........................33 Electronic function.....................34...
  • Page 4 Content 10.8 Heating mode ..........................37 10.9 Defrosting mode(available for heating mode) ................38 10.10 Auto mode ..........................39 10.11 Force cooling function ........................ 39 10.12 Sleep mode..........................40 10.13 Auto restart function........................41 Model and Parameters....................42 Troubleshooting ......................43 12.1 Display board..........................

  • Page 5: 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 6: Outdoor Unit

    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.
  • Page 7 Service manual 3. Dimension 3.1 Indoor unit Dimension Mode 1080 1080 1250 - 5 -...

  • Page 8: Outdoor Unit

    Service manual 3.2 Outdoor unit Dimension Mode - 6 -...

  • Page 9: Specification

    Service manual 4. Specification Model MSG-24CR MSG-24HR Power supply Ph-V-Hz 1, 220-240V~,50Hz 1, 220-240V~,50Hz Capacity Btu/h 24000 24000 Input 2750 2750 Cooling Rated current 12.5 12.5 Btu/w.h 8.7, 2.6 8.7, 2.6 Capacity Btu/h 27000 ----- Input ----- 2750 Heating Rated current 12.5...
  • Page 10 Service manual Model MSG-30CR MSG-30HR Power supply Ph-V-Hz 1, 220-240V~,50Hz 1, 220-240V~,50Hz Capacity Btu/h 28000 28000 Input 3200 3200 Cooling Rated current Btu/w.h Capacity Btu/h ----- 30000 Input ----- 3100 Heating Rated current 14.5 ----- ----- Max. current Starting current Model ZR34KH-PFJ-522 ZR34KH-PFJ-522...
  • Page 11 Service manual Model MSG-36CR MSG-36HR Power supply Ph-V-Hz 1, 220-240V~, 50Hz 1, 220-240V~, 50Hz Capacity Btu/h 35000 35000 Input 4120 4120 Cooling Rated current 18.6 18.6 Btu/w.h Capacity Btu/h 38000 ----- Input 4100 ----- Heating Rated current 18.5 ----- ----- Max.
  • Page 12 Service manual Model MSG-30CR MSG-30HR Power supply Ph-V-Hz 3Ph,380-420V,50Hz 3Ph,380-420V,50Hz Capacity Btu/h 28000 28000 Input 3000 3000 Cooling Rated current Btu/w.h Capacity Btu/h 32000 ----- Input ----- 3000 Heating Rated current ----- ----- 10.7 Max. current Starting current Model ZR34KH-TFD-522 ZR34KH-TFD-522 Type Scroll...
  • Page 13 Service manual Model MSG-36CR MSG-36HR Power supply Ph-V-Hz 3, 380-420V~, 50Hz 3, 380-420V~, 50Hz Capacity Btu/h 35000 35000 Input 4120 4120 Cooling Rated current Btu/w.h Capacity Btu/h ----- 38000 Input ----- 4100 Heating Rated current ----- ----- Max. current Starting current Model ZR34KH-TFD-522 ZR34KH-TFD-522...

  • Page 14: Refrigerant Cycle Diagram

    Service manual 5. Refrigerant cycle diagram Ø Cooling only Ø Heat pump mode - 12 -...

  • Page 15: Schematic Diagram And Wiring Diagram

    Service manual 7. Schematic diagram and Wiring diagram Schematic diagram - 15 -...
  • Page 16 Service manual 7.2.2 Heating mode MSG-24HR, MSG-30HR - 18 -...
  • Page 17 Service manual MSG-36HR - 19 -...
  • Page 18 Service manual 7.2.3 Cooling mode (3 Ph) MSG-30CR (3ph) - 20 -...
  • Page 19 Service manual 7.2.4 Heating mode (3 Ph) MSG-30HR (3ph) - 22 -...
  • Page 20 Service manual MSG-36HR (3ph) - 23 -...

  • Page 21: 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 22: 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 23: 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 24: 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 25: 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 26: 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 27: 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 28: Capacity Table

    Service manual 9. Capacity table MSG-24CR SUMMER Cooling mode OUTDOOR TEMPERATURE DRY Indoor 25ºC 30ºC 35ºC 40ºC 45ºC 50ºC Conditions 21ºC D Total capacity kW 6.76 6.35 5.88 5.41 5.05 4.69 15ºC W Sensitive capacity kW 4.93 4.74 4.44 4.11 3.86...

  • Page 29: Msg-30Cr

    Service manual MSG-30CR OUTDOOR TEMPERATURE DRY SUMMER Cooling mode Indoor 25ºC 30ºC 35ºC 40ºC 45ºC 50ºC Conditions 21ºC D Total capacity kW 7.88 7.40 6.86 6.31 5.90 5.47 15ºC W Sensitive capacity kW 5.75 5.52 5.18 4.79 4.50 4.21 Input kW. 2.74 2.89 3.01...

  • Page 30: Msg-36Cr

    Service manual MSG-36CR SUMMER Cooling mode OUTDOOR TEMPERATURE DRY Indoor 25ºC 30ºC 35ºC 40ºC 45ºC 50ºC Conditions 21ºC D Total capacity kW 9.87 9.27 8.59 7.90 7.38 6.85 15ºC W Sensitive capacity kW 7.21 6.92 6.48 6.00 5.64 5.28 Input kW. 3.52 3.72 3.87...

  • Page 31: Model And Parameters

    Service manual 11. Model and Parameters Model MSG-24CR MSG-24HR MSG-30CR MSG-30HR MSG-36CR MSG-36HR I3SEC [A] I5MIN [A] IFAN [A] IDEFROST [A] TE1 ['C] TE2 ['C] TE3 ['C] TE4 ['C] TE5 ['C] TE6 ['C] TE7 ['C] TE8 ['C] TE9 ['C] TE10 ['C]...

  • Page 32: 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 33: 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 34: Diagnostic Chart

    Service manual 12.3 Diagnostic chart After energizing, no indicator is lighted and the air conditioner can’t be operated. - 45 -...

  • Page 35: 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 36: 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.

This manual is also suitable for:

Msg-24hrMsg-30hrMsg-30crMsg-36crMsg-36hr

Table of Contents