Midea MSC-18HRDN1-QC2 Service Manual
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Midea MSC-18HRDN1-QC2 Service Manual

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Corona Plus varmepumper
SERVICEMANUAL
MSC-18HRDN1-QC2
code: 21112007-0

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Summary of Contents for Midea MSC-18HRDN1-QC2

  • Page 1 Corona Plus varmepumper SERVICEMANUAL MSC-18HRDN1-QC2 code: 21112007-0...

  • Page 2: Table Of Contents

    7.7 Balance refrigerant of the 2-way, 3-way valves ....................16 7.8 Evacuation................................. 17 7.9 Gas charging ..............................18 8. Operation characteristics........................19 8.1 MSC-18HRDN1-QC2 ............................19 8.2 MSH-18HRDN1-QC2 ............................20 9. Electronic function..........................21 9.1 Abbreviation............................... 21 9.2 Display function ..............................21 9.3 Protection ................................
  • Page 3 9.12 Timer function..............................28 9.13 Sleep function mode............................29 9.14 Auto-Restart function............................29 9.15 Ionizer/Plasma dust collector function(optional) ....................29 9.16 Outdoor chassis heating cable (optional)......................29 10. Troubleshooting ........................... 30 10.1 Indoor Unit Error Display ..........................31 10.2 Diagnosis and Solution............................ 33 10.3 Key parts checking.

  • Page 4: Precaution

    1. Precaution installation stand. 1.1 Safety Precaution It may cause injury, accident, or damage to the To prevent injury to the user or other people product. and property damage, the following instructions Be sure the installation area does not must be followed. deteriorate with age.
  • Page 5 It may cause corrosion on the product. Corrosion, arrives. particularly on the condenser and evaporator fins, There is risk of property damage, failure of product, could cause product malfunction or inefficient or electric shock. operation. Do not open the inlet grill of the product during operation.
  • Page 6 your skin or clothes, wash it well with clean The chemical in batteries could cause burns or other health hazards water. Do not use the remote of the batteries have leaked.

  • Page 7: Function

    2. Function Indoor unit Operation 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. Anti-freezing control in cooling Prevent the water being frozen on evaporator by sensing the evaporator pipe temperature in cooling mode Ionizer (Optional) Time Delay Safety control...
  • Page 8 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.

  • Page 9: Dimension

    3. Dimension 3.1 Indoor Unit MSC-18HRDN1-QC2 MSH-18HRDN1-QC2...

  • Page 10: Outdoor Unit

    3.2 Outdoor Unit MOF-18HDN1-QC2...

  • Page 11: Specification

    4. Specification Indoor MSC-18HRDN1-QC2 MSH-18HRDN1-QC2 Outdoor MOF-18HDN1-QC2 MOF-18HDN1-QC2 Power supply Ph-V-Hz 1,220-240V~,50Hz 1, 220-240V~, 50Hz Capacity Btu/h 17500(5300~23000) 17500(5300~23000) Input 1600(400~2300) 1600(400~2300) Cooling Rated current 7.0(1.8~10.4) 7.0(1.8~10.4) Btu/w.h, w/w 10.9,3.21 10.9, 3.21 Capacity Btu/h 17000(5100~22000) 17000(5100~22000) Input 1460(360~2100) 1460(360~2100) Heating Rated current 6.5(1.6~9.5)

  • Page 12: Refrigerant Cycle Diagram

    5. Refrigerant cycle diagram...

  • Page 13: Wiring Diagram

    6. Wiring diagram 6.1 Indoor Unit MSC-18HRDN1-QC2 MSH-18HRDN1-QC2...

  • Page 14: Outdoor Unit

    6.2 Outdoor Unit MOF-18HDN1-QC2...

  • Page 15: Installation Details

    7. Installation details 7.1 Wrench torque sheet for installation Outside diameter Torque inch Kgf.m Ф6.35 Ф12.7 7.2 Connecting the cables The power cord of connect should be selected according to the following specifications sheet. Grade Unit 7.3 Pipe length and the elevation Standard Max.
  • Page 16 leakage from the refrigeration cycle. Procedure Caution: 1. Recheck the piping connections. If gas leakage is discovered in step (3) above, take the 2. Open the valve stem of the 2-way valve following measures. counterclockwise approximately 90’, wait 10 If the leaks stop when the piping connections are seconds, and then set it to closed position.

  • Page 17: Pumping Down (Re-Installation)

    7.5 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 18: Re-Air Purging (Re-Installation)

    7.6 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 19: Balance Refrigerant Of The 2-Way, 3-Way Valves

    7.7 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 20: Evacuation

    7.8 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 21: Gas Charging

    7.9 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 22: Operation Characteristics

    8. Operation characteristics 8.1 MSC-18HRDN1-QC2 Piping Length Characteristics (Cooling) Cooling Characteristics 1.60 1.72 1.58 1.68 1.56 1.64 1.54 1.60 1.52 1.56 1.50 1.52 1.48 1.48 10 11 12 13 14 25 27 29 31 33 35 37 39 41 43 Piping Length (m) ℃...

  • Page 23: Msh-18Hrdn1-Qc2

    8.2 MSH-18HRDN1-QC2 Piping Length Characteristics (Cooling) Cooling Characteristics 1.60 1.72 1.58 1.68 1.56 1.64 1.54 1.60 1.52 1.56 1.50 1.52 1.48 1.48 10 11 12 13 14 25 27 29 31 33 35 37 39 41 43 ℃ Piping Length (m) Outdoor Ambient Temperature ( ) Remark: Indoor room temperature: 27/19℃...

  • Page 24: Electronic Function

    T3: Pipe temperature of outdoor heat exchanger T4: Outdoor ambient temperature 9.2 Display function 9.2.1 Icon explanation on indoor display board. MSC-18HRDN1-QC2 MSH-18HRDN1-QC2 ① Auto indicator This indicator illuminates when the air conditioner is in AUTO operation. ② Timer indicator This indicator illuminates when TIMER is set ON/OFF.

  • Page 25: Protection

    9.2.2 LED display control function. Pressing “LED display” button on remote controller will turn off all displays on indoor unit, while pressing once again, all displays will resume. 9.2.3 Display function in outdoor unit. 9.3 Protection 9.3.1 Three Minutes Delay at restart for compressor. 9.3.2 Temperature protection of compressor top.

  • Page 26: Cooling Mode

    I2COOL freq. remains if curr. descends I1COOL running normally Remark: I1COOL I2COOL I3COOL MSC-18HRDN1-QC2 9.5 A 10.5 A 13 A MSH-18HRDN1-QC2 9.5 A 10.5 A 9.5.4 Rating capacity test function 1) Set the indoor unit with remote controller as: high fan, 17℃ in cooling mode, then press “TURBO” button on...

  • Page 27: Drying Mode

    controller 6 times or more within 10 seconds(make sure indoor unit receives these signals), the machine will turn into rating capacity test mode, the buzzer will make a “di” sound for 2 seconds continuously. Also, indoor fan will change to rating speed, the frequency of compressor will be fixed as rating value. Any condition of above is not satisfied, the machine can not be turned into rating capacity test mode.
  • Page 28 ℃ setting fan speed low fan breeze super breeze fan stop If the compressor stops caused by room temperature rising, indoor fan will be forced to run 127 seconds with breeze. During this period, anti-cold-wind is disabled. After this, anti-cold –wind function is available.
  • Page 29 I2HEAT freq. remains if curr. descends I1HEAT running normally Remark: I1HEAT I2 HEAT I3 HEAT MSC-18HRDN1-QC2 9.5 A 10.5 A 13 A MSH-18HRDN1-QC2 9.5 A 10.5A 13 A 9.7.8 Indoor heat exchanger high temperature protection.

  • Page 30: Auto Mode Function

    9.7.10 Defrosting action. compressor 4-way valve outdoor fan indoor fan indoor fan breeze 10s no longer than 10 minutes 9.7.11 Rating capacity test function. Set the indoor unit with remote controller as: high fan, 30℃ in heating mode, then press “TURBO” button on controller 6 times or more within 10 seconds(make sure indoor unit receives these signals), the machine will turn into rating capacity test mode, the buzzer will make a “di”...

  • Page 31: Forced Operation Function

    then rechoose mode according to ∆T. 9.8.4 If the setting temperature is modified, the machine will rechoose running function. 9.9 Forced operation function 9.9.1 Forced cooling and auto function can carry out with a touch button. In these two modes, the machine can be changed by remote controller to any other mode at any moment.

  • Page 32: Sleep Function Mode

    9.13 Sleep function mode 9.13.1 Operation time in sleep mode is 7 hours. After 7 hours the machine quits this mode and turns off. 9.13.2 In cooling, heating or auto mode sleep function is available. 9.13.3 Operation process in sleep mode is as follow: After pressing ECONOMIC or SLEEP button on controller, the machine will turn into sleep mode.

  • Page 33: Troubleshooting

    10. Troubleshooting Safety Because of there are capacitors in PCB and relative circuit in outdoor unit, even shut down the power supply, electricity power still are kept in capacitors, do not forget to discharge the electricity power in capacitor. Electrolytic Capacitors (HIGH VOLTAGE! CAUTION!) Bulb (25-40W)

  • Page 34: Indoor Unit Error Display

    10.1 Indoor Unit Error Display Display LED STATUS EEPROM parameter error Indoor / outdoor units communication protection Zero-crossing signal error Fan speed out of control Open or short circuit of outdoor temperature sensor Open or short circuit of room or evaporator temperature sensor IGBT over-strong current protection Over voltage or too low voltage protection Temperature protection of compressor top.
  • Page 35 LED6 LED5 LED4 LED1...

  • Page 36: Diagnosis And Solution

    10.2 Diagnosis and Solution 10.2.1 E0(EEPROM parameter error) error diagnosis and solution Circuit or software error on indoor PCB Replace indoor PCB 10.2.2 E1(indoor / outdoor units communication protection) error diagnosis and solution Disconnect the power supply, after 1 minute, connect the power supply, turn on the unit with remote controller Does the unit work normally?
  • Page 37 10.2.4 E3(indoor fan speed out of control) diagnosis and solution Is the indoor fan motor Repair the connector and connector and connection reconnect good? Is voltage being applied to the fan motor? Indoor PCB is defective. (rang 90v-160v between Replace the indoor PCB. mid pin and N on CN1 Replace the indoor fan motor...
  • Page 38 10.2.8 P1(over voltage or too low voltage protection) diagnosis and solution. Be sure the power supply is Is the power supply good? normal when using the units Replace the outdoor e-box. 10.2.9 P2(temperature protection of compressor top) diagnosis and solution. Is the connection Does compressor Reconnect and retest.

  • Page 39: Key Parts Checking

    10.3 Key parts checking. 10.3.1. Compressor checking (Model: C-6RVN93H0N). Measure the resistance value of each winding by using the multi-meter. Position Resistance Value Blue - Red 0.668 Blue - Black (25℃) Red - Blue 10.3.2 Outdoor Fan Motor (Model: YDK53-6F). Measure the resistance value of each winding by using the multi-meter.
  • Page 40 10.3.4 Temperature Sensors. Room temp.(T1) sensor, Indoor coil temp.(T2) sensor, Outdoor coil temp.(T3) sensor, Outdoor ambient temp.(T4) sensor, Compressor exhaust temp.(Te) sensor. Measure the resistance value of each winding by using the multi-meter. Some frequently-used R-T data for T1, T2, T3 and T4 sensor: ℃...

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