Related Manuals for Midea MSX-18HRDN1-QC2
Summary of Contents for Midea MSX-18HRDN1-QC2
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Page 1: Service Manual
SERVICE MANUAL MIDEA AIRCONDITIONER DC INVERTER SPLIT WALL-MOUNTED TYPE MSX-18HRDN1-QC2 V1.0 Apr, 2008... -
Page 2: Table Of Contents
CONTENTS 1. Precaution..............................1 1.1 Safety Precaution ..............................1 1.2 Warning ................................1 2. Function ..............................4 3. Dimension..............................6 3.1 Indoor Unit................................6 3.2 Outdoor Unit ................................ 6 4. Specification ............................. 7 5. Refrigerant cycle diagram........................8 6. Wiring diagram ............................9 6.1 Indoor Unit................................ - Page 3 10. Troubleshooting ........................... 29 10.1 Indoor Unit Error Display ..........................30 10.2 Diagnosis and Solution............................ 31 10.3 Key parts checking............................34...
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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.
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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. Ionizer/Plasma (Optional) Anti-freezing control in cooling Prevent the water being frozen on evaporator by sensing the evaporator pipe temperature in cooling mode Self clean 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.
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Page 9: Dimension
3. Dimension 3.1 Indoor Unit 3.2 Outdoor Unit... -
Page 10: Specification
4. Specification Indoor MSX-18HRDN1-QC2 Outdoor MOF-18HDN1-QC2 Power supply Ph-V-Hz 1, 220-240V~, 50Hz Capacity Btu/h 17000(5300~23000) Input 1550(400~2300) Cooling Rated current 6.7(1.8~10.4) Btu/w.h, w/w 11.0, 3.21 Capacity Btu/h 18000(5100~22000) Input 1460(360~2100) Heating Rated current 6.3(1.6~9.5) 3.61 Moisture Removal Max. input consumption 2700 Max. -
Page 11: Refrigerant Cycle Diagram
5. Refrigerant cycle diagram... -
Page 12: Wiring Diagram
6. Wiring diagram 6.1 Indoor Unit... -
Page 13: Outdoor Unit
6.2 Outdoor Unit... -
Page 14: 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 15 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.
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Page 16: 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 17: 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 18: 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 19: 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 20: 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 21: Operation Characteristics
8. Operation characteristics Piping Length Characteristics (Cooling) Cooling Characteristics 1.58 1.68 1.56 1.64 1.54 1.60 1.52 1.56 1.50 1.52 1.48 1.48 1.44 1.46 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 22: Electronic Function
9. Electronic function 9.1 Abbreviation T1: Indoor ambient temperature T2: Pipe temperature of indoor heat exchanger T3: Pipe temperature of outdoor heat exchanger T4: Outdoor ambient temperature 9.2 Display function Icon explanation on indoor display board. This indicator flashes after power is on and illuminates when the unit is in operation. -
Page 23: Protection
This indicator appears only when the compressor is in operation and indicates the current operating frequency. Usually it displays the temperature settings. When the setting temperature is being changed, this indicator will flash at 0.5Hz for 10 times. It displays the room temperature (0℃~50℃) when the air conditioner is in FAN only operation. -
Page 24: Fan-Only Mode
higher than 15℃, the compressor heating cable stopping working. 9.4 Fan-Only Mode 9.4.1 Temperature setting function is disabled, and no setting temperature display. 9.4.2 In this mode, the action of louver is the same as in cooling mode. 9.4.3 The action of auto fan in fan-only mode is the same as auto fan in cooling mode with 24℃ setting temperature. ℃... -
Page 25: Drying Mode
Remark: I1COOL I2COOL I3COOL MSX-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 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 26: Heating Mode
9.7 Heating mode 9.7.1 Indoor fan action: Anti-cold-wind function. ℃ 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 27 I2HEAT freq. remains if curr. descends I1HEAT running normally Remark: I1HEAT I2 HEAT I3 HEAT MSX-18HRDN1-QC2 9.5 A 10.5A 9.7.5 Indoor heat exchanger high temperature protection. If T2＞60℃, the compressor will stop and not resume until T2＜48℃. 9.7.6 Defrosting mode.
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Page 28: Auto Mode Function
9.7.7 Defrosting action. compressor 4-way valve outdoor fan indoor fan indoor fan breeze 10s no longer than 10 minutes 9.7.8 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 29: Forced Operation Function
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. 9.9.2 When the machine is off, pressing the touch button will carry the machine to forced auto mode, after this, if pressing the button once again within 5 seconds, the machine will turn into forced cooling mode. -
Page 30: 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 31: Outdoor Chassis Heating Cable(Optional)
which sent from remote controller every 3 minutes, the buzzer will not respond. When the unit is running with follow me function, the PCB will control the unit according to the temperature from follow me signal, and the temperature collection function of room temperature sensor will be shielded, but the error detective function of room temperature sensor will be still valid. -
Page 32: 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 33: 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 34: 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 35 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 36 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.
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Page 37: 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 38 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: ℃...