Midea MSY-09HRDN1-QC8 Service Manual
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Midea MSY-09HRDN1-QC8 Service Manual

Air conditioner dc inverter split wall-mounted type, r410a, 1ph, 220~240v, 50hz
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Service Manual

Model
MSY-09HRDN1-QC8
MSY-12HRDN1-QC4
MSY-09HRDN1-QC2
MSY-12HRDN1-QC2
MSY-18HRDN1-QC2
Website: www.mideaaircon.com

AIR CONDITIONER

DC Inverter
Split Wall-Mounted Type
Refrigerant type
R410A
R410A
R410A
R410A
R410A
Y series
Power supply
1Ph, 220~240V, 50Hz
1Ph, 220~240V, 50Hz
1Ph, 220~240V, 50Hz
1Ph, 220~240V, 50Hz
1Ph, 220~240V, 50Hz

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Summary of Contents for Midea MSY-09HRDN1-QC8

  • Page 1: Service Manual

    Website: www.mideaaircon.com Service Manual AIR CONDITIONER DC Inverter Split Wall-Mounted Type Y series Model Refrigerant type Power supply MSY-09HRDN1-QC8 R410A 1Ph, 220~240V, 50Hz MSY-12HRDN1-QC4 R410A 1Ph, 220~240V, 50Hz MSY-09HRDN1-QC2 R410A 1Ph, 220~240V, 50Hz MSY-12HRDN1-QC2 R410A 1Ph, 220~240V, 50Hz MSY-18HRDN1-QC2 R410A...

  • Page 2: Table Of Contents

    CONTENTS 1. Precaution............................1 1.1 Safety Precaution ..........................1 1.2 Warning..............................1 2. Function............................... 3 3. Dimension ............................6 3.1 Indoor Unit ............................6 3.2 Outdoor Unit ............................7 4. Specification............................9 5. Refrigerant cycle diagram....................... 10 6. Wiring diagram ..........................13 6.1 Indoor Unit ............................
  • Page 3 8.14 Auto-Restart function ........................32 8.15 Super ionizer function........................29 8.16 Self clean function......................... 29 8.17 Follow me function……………………………………………………………………………………………………………… ……………….30 8.18 Outdoor heating cable function…………………………………………………………………………………………………………….30 9. Troubleshooting ..........................33 9.1 Indoor Unit Error Display ........................35 9.2 Diagnosis and Solution........................36 9.3 Key parts checking..........................

  • Page 4: Precaution

    1. Precaution or injury. 1.1 Safety Precaution Do not install the product on a To prevent injury to the user or other defective installation stand. people and property damage, the following It may cause injury, accident, or damage to the product. instructions must be followed.
  • Page 5 disconnect the power supply cable. noise or hot air from the outdoor unit could There is risk of electric shock or fire. damage the neighborhoods. Stop operation and close the window It may cause a problem for your neighbors. in storm or hurricane. If possible, remove the Use two or more people to lift and product from the window before the hurricane transport the product.
  • Page 6 product. It is not sanitary could cause serious health issues. Use a firm stool or ladder when cleaning or maintaining the product. Be careful and avoid personal injury. Replace the all batteries in the remote control with new ones of the same type. Do not mix old and mew batteries or different types of batteries.

  • Page 7: Function

    2. Function Indoor unit Operation by remote controller Sensing by room temperature Room temperature sensor. Pipe temperature Room temperature control Maintain the room temperature in Golden fin accordance with the setting temperature. (Optional) Anti-freezing control in cooling Compact Prevent the water being frozen on evaporator by design sensing the evaporator pipe temperature in cooling mode...
  • 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.

  • Page 9: Dimension

    3. Dimension 3.1 Indoor Unit Dimension Model MSY-09HRDN1-QC2 MSY-09HRDN1-QC8 MSY-12HRDN1-QC2 MSY-12HRDN1-QC4 MSY-18HRDN1-QC2 1022...

  • Page 10: Outdoor Unit

    3.2 Outdoor Unit MOA-09HDN1-QC2 MOB4-12HDN1-QC2...
  • Page 11 MOC-09HDN1-QC8, MOC-12HDN1-QC4, MOC-18HDN1-QC2...

  • Page 12: Specification

    4. Specification Model MSY-09HRDN1-QC8 MSY-12HRDN1-QC4 Indoor MSY-09HRDN1-QC8 MSY-12HRDN1-QC4 Outdoor MOC-09HDN1-QC8 MOC-12HDN1-QC4 Power supply Ph-V-Hz 1,220-240V~,50Hz 1,220-240V~,50Hz Capacity Btu/h 9000(3100~11500) 12000(3800~14800) Input 690(280~1100) 1030(360~1480) Cooling Rated current 3.1(1.3~4.8) 4.6(1.6~6.5) 3.82 3.41 Capacity Btu/h 10000(3300~12500) 13000(4000~15500) Input 690(300~1150) 1000(340~1450) Heating Rated current 3.1(1.4~5.0)
  • Page 13 Net/Gross weight 40.5/43 40.5/43 Refrigerant type R410A 1100 1100 Design pressure Liquid side/ Gas side Ф6.35/Ф9.53 Ф6.35/Ф12.7 Refrigerant Max. refrigerant pipe piping length Max. difference in level Connection wiring Plug type Thermostat type Electronic control Electronic control Operation temp ℃ 17 ~ 30 17 ~ 30 Ambient temp...
  • Page 14 motor Brand Welling Welling Welling Input Capacitor Speed r/min 1250/1200/1050/850/700 1280/1250/1050/900/750 1280/1260/1080/900/750 Indoor air flow (Hi/Mi/Lo) m3/h 480/420/320 600/500/400 870/730/520 Indoor noise level (Hi/Mi/Lo) dB(A) 37/33/27 38/34/28 42/37/32 Dimension (W*H*D) 850×275×160 900×285×160 1022×295×185 Indoor unit Packing (W*H*D) 940×360×250 990×375×250 1105×385×275 Net/Gross weight 8.5/11 9/11.5...

  • Page 15: Refrigerant Cycle Diagram

    5. Refrigerant cycle diagram...

  • Page 16: Wiring Diagram

    6. Wiring diagram 6.1 Indoor Unit MSY-09HRDN1-QC8, MSY-12HRDN1-QC4, MSY-09HRDN1-QC2, MSY-12HRDN1-QC2, MSY-18HRDN1-QC2...

  • Page 17: Outdoor Unit

    6.2 Outdoor Unit MOC-09HDN1-QC8, MOC-12HDN1-QC4 MOA-09HDN1-QC2...
  • Page 18 MOB4-12HDN1-QC2 MOC-18HDN1-QC2...

  • Page 19: Installation Details

    7. Installation details 7.1 Wrench torque sheet for installation Outside diameter Torque inch Kgf.m Ф6.35 Ф9.52 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 20 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. Be sure, using a torque wrench to tighten the service port cap (after using the service port), so that it prevents the gas leakage from the refrigeration cycle.

  • Page 21: 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 22: 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 23: 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 24: 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 25: 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 26: Electronic Function

    8. Electronic function 8.1 Abbreviation T1: Indoor ambient temperature T2: Pipe temperature of indoor heat exchanger T3: Pipe temperature of outdoor heat exchanger T4: Outdoor ambient temperature 8.2 Display function 8.2.1 Icon explanation on indoor display board. Lights up when the super ionizer function is energized. This indicator illuminates when TIMER is set ON/OFF.

  • Page 27: Protection

    8.3 Protection 8.3.1 Three Minutes Delay at restart for compressor. 8.3.2 Temperature protection of compressor top. If the temperature of compressor top is too high (higher than 115℃ and the Over-load Protector is cut, the units stop. When the Over-load Protector restore and close (lower than 100℃), the compressor will restart (In this case the compressor is restricted by Three Minutes Delay protection.) 8.3.3 Temperature protection of compressor exhaust.

  • Page 28: Cooling Mode

    8.5 Cooling Mode 8.5.1 The operation frequency of compressor after starting submits to following rule. -0.5 -1.0 When the machine is running and ΔT(=room temp. – setting temp.) changes, the frequency of compressor will rise or descend a grade (7 minutes after starting). After starting, if ΔT stays in a zone for 3 minutes, the frequency will change as follow: Zone A : Current frequency rise a grade till the maximum grade F8.

  • Page 29: Drying Mode

    Indoor fan turns to turbo speed. After running for 30 minutes the machine will turn back to previous setting mode. 8.5.6 Indoor fan operation rule. In cooling mode, indoor fan runs all the time and the speed can be selected as high, medium, low and auto.
  • Page 30 seconds with breeze. During this period, anti-cold-wind is disabled. After this, anti-cold –wind function is available. If the machine runs in rating capacity test mode, indoor fan runs with rating speed, and anti-cold-wind is disabled. 8.7.2 Indoor fan speed can be set as high, medium, low or auto grade, but anti-cold-wind function is preferential.
  • Page 31 comp. pause I3HEAT freq. descends if curr. rises; I2HEAT freq. remains if curr. descends I1HEAT running normally 8.7.5 Indoor heat exchanger high temperature protection. If T2＞60℃, the compressor will stop and not resume until T2＜48℃. 8.7.6 Defrosting mode. Condition of defrosting. Condition 1: If T4＞0℃, When the units are running, if the following two items are satisfied the units start defrosting: The units runs with T3＜3℃...
  • Page 32 For MSY-09HRDN1-QC8 and MSY-12HRDN1-QC4 and MSY-18HRDN1-QC2 compress 4-way valve outdoor indoor indoor fan no longer than 10 8.7.8 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 33: Auto Mode Function

    The machine will quit from the rating capacity test mode if running for 5 hours or changing fan speed or setting temperature. 8.7.9 Turbo function in heating mode. (press the “TURBO” button on remote controller) Elevate current frequency (excluding F8) to a higher grade. If indoor fan is in low speed or pause caused by defrosting or anti-cold-wind function, frequency of compressor will not be elevated one grade until these limit has been released.

  • Page 34: Two Speeds Outdoor Fan Function

    forced cooling mode 4-way valve is on. If the machine changes operation mode from heating to cooling\drying\forced cooling mode, 4-way valve will be delayed off 2 minutes after compressor stop. If the machine changes operation mode from non-heating mode to heating mode, the 4-way valve will be turned off immediately.

  • Page 35: Auto-Restart Function

    8.13.5 When user uses timer off function in sleep mode(or sleep function in timer off mode), if the timing time is less than 7 hours, sleep function will be cancelled when reaching the setting time. If the timing time is more than 7 hours, the machine will not stop until reaches the setting off time in sleep mode.

  • Page 36: Outdoor Heating Cable

    When the follow me function is available, the PCB will control the unit according to the room temperature (T1) from the remote controller and the setting temperature (TS), and the action of compressor is as following: At cooling mode, if T1＜TS, compressor is off; If T1≥TS, compressor is on. At heating mode, if T1＞TS, compressor is off;...

  • Page 37: Troubleshooting

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

  • Page 38: Indoor Unit Error Display

    9.1 Indoor Unit Error Display Display LED STATUS EEPROM parameter error Indoor / outdoor units communication protection Zero-crossing signal error Indoor fan speed out of control Open or short circuit of outdoor temperature sensors Open or short circuit of indoor temperature sensors Outdoor fan speed out of control Reset error of Auto Clean filters IGBT over-strong current protection...

  • Page 39: Diagnosis And Solution

    9.2 Diagnosis and Solution 9.2.1 E0 (EEPROM parameter error) error diagnosis and solution Circuit or software error on indoor PCB Replace indoor PCB 9.2.2 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...
  • Page 40 9.2.4 E3(indoor fan speed out of control) diagnosis and solution Is the indoor fan motor Repair the connector and connector and reconnect connection good? Is voltage being applied to the fan Indoor PCB is defective. motor? Replace the indoor PCB. (rang 90v-160v between mid pin and N Replace the indoor fan...
  • Page 41 Is all connections on PCB Repair or correct the and between PCB and connector or connection. compressor good? Replace the outdoor Check the compressor PCB and then repower on. Is the failure cleared? 9.2.8 P1(over voltage or too low voltage protection) diagnosis and solution. Be sure the power supply Is the power supply is normal when using the...
  • Page 42 Is the connection of compressor good? Is the Reconnect and retry wiring sequence right? The voltage range Replace the outdoor E-box. If the problem comes to again, check coil Replace inverter resistance of inverter compressor compressor, is it right?

  • Page 43: Key Parts Checking

    9.3 Checking for 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: Temperature (℃) Resistance Value 26.9...

This manual is also suitable for:

Msy-12hrdn1-qc4Msy-09hrdn1-qc2Msy-12hrdn1-qc2Msy-18hrdn1-qc2

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