1. Precaution 1.1 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. 1.2 Warning ...
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condenser and evaporator. For installation, always contact the dealer or an Authorized service center. There is risk of fire, electric shock, explosion, or injury. Do not install the product on a defective installation stand. It may cause injury, accident, or damage to the product. ...
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There is risk of explosion or fire. If strange sounds, or small or smoke comes from product. Turn the breaker off or disconnect the power supply cable. There is risk of electric shock or fire. Stop operation and close the window in storm or hurricane. If possible, remove the product from the window before the hurricane arrives.
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It can avoid vibration of water leakage. Do not install the product where the noise or hot air from the outdoor unit could damage the neighborhoods. It may cause a problem for your neighbors. Use two or more people to lift and transport the product. Avoid personal injury.
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operated. There are sharp and moving parts that could cause personal injury. Do not drink the water drained from the 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.
3.2 Outdoor Units More than 30cm More than 60cm (Service space More than 30cm More than 60cm More than 70cm Model MOA-09HDN1-MN5W MOR-09CDN1-BN10W MOR-09HDN1-BN10W MOA-09CDN1-MN5W MOR-12CDN1-BN10W MOR-12HDN1-BN10W MOB-12CDN1-MN10W MOB-12HDN1-MN10W MOC-18CDN1-MN10W...
4. Refrigerant Cycle Diagram For cooling only models: INDOOR OUTDOOR LIQUID SIDE CAPILIARY TUBE HEAT HEAT EXCHANGE EXCHANGE (EVAPORATOR) (CONDENSER) GAS SIDE COMPRESSOR...
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For heat pump models: INDOOR OUTDOOR CHECK VALVE LIQUID SIDE (Heating Model only) 2-WAY VALVE CAPILIARY TUBE HEAT HEAT EXCHANGE EXCHANGE (EVAPORATOR) (CONDENSER) GAS SIDE REVERSING VALVE 3-WAY VALVE (Heating Model only) ACCUMULATOR COOLING COMPRESSOR HEATING...
6. Installation details 6.1 Wrench torque sheet for installation Additional Outside diameter Torque tightening torque inch N.cm N.cm 1500 1600 Ф6.35 (153kgf.cm) (163kgf.cm) 2500 2600 Ф9.52 (255kgf.cm) (265kgf.cm) 3500 3600 Ф12.7 (357kgf.cm) (367kgf.cm) 6.2 Connecting the cables The power cord of connect should be selected according to the following specifications sheet. Rated current of appliance Nominal cross-sectional area (mm²) >3 and ≤6...
6.4 Installation for the first time Air and moisture in the refrigerant system have undesirable effects as below: ● Pressure in the system rises. ● Operating current rises. ● Cooling or heating efficiency drops. ● Moisture in the refrigerant circuit may freeze and block capillary tubing. ●...
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the meter does not indicate -0.1Mpa after pumping 30 minutes, it should be pumped 20 minutes more. If the pressure can’t achieve -0.1Mpa after pumping 50 minutes, please check if there are some leakage points. Fully close the handle Lo valve of the manifold valve and stop the operation of the vacuum pump. Confirm that the gauge needle does not move (approximately 5 minutes after turning off the vacuum pump).
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Close the valve on the charging cylinder and discharge the refrigerant by loosening the flare nut on the 2-way valve approximately 45’ until the gauge indicates 0.3 to 0.5 Mpa. 6). Disconnect the charge set and the charging cylinder, and set the 2-way and 3-way valves to the open position.
6).When the electronic scale displays the proper weight (refer to the table), disconnect the charge hose from the 3-way valve’s service port immediately and turn off the air conditioner before disconnecting the hose. 7). Mount the valve stem caps and the service port Use torque wrench to tighten the service port cap to a torque of 18N.m.
6).When the electronic scale displays the proper weight (refer to the gauge and the pressure of the low side), disconnect the charge hose from the 3-way valve’s service port immediately and turn off the air conditioner before disconnecting the hose. 7).
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5). Operate the air conditioner at the cooling cycle and stop it when the gauge indicates 0.1MPa. 6). Set the 3-way valve to the closed position immediately Do this quickly so that the gauge ends up indicating 0.3 to 0.5Mpa. Disconnect the charge set, and tighten the 2-way and 3-way valve’s stem nuts.
Close the valve on the charging cylinder and discharge the refrigerant by loosening the flare nut on the 2-way valve approximately 45’ until the gauge indicates 0.3 to 0.5 Mpa. 6). Disconnect the charge set and the charging cylinder, and set the 2-way and 3-way valves to the open position Be sure to use a hexagonal wrench to operate the valve stems.
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2. Refrigerant charging Electronic scale Procedure: 1). Connect the charge hose to the charging cylinder, open the 2-way valve and the 3-way valve Connect the charge hose which you disconnected from the vacuum pump to the valve at the bottom of the cylinder.
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Use torque wrench to tighten the service port cap to a torque of 18N.m. Be sure to check for gas leakage...
7. Operation characteristics Temperature Cooling operation Heating operation Drying operation Mode Room temperature ≥17℃(62℉) ≤30℃(86℉) >10℃(50℉) 0℃~50℃ (32℉~122℉) -15℃~30℃ 0℃~50℃ Outdoor temperature -15℃~50℃(5℉~122℉) (5℉~86℉) (32℉~122℉) (For the models with low temperature cooling system) CAUTION: 1. If air conditioner is used outside of the above conditions, certain safety protection features may come into operation and cause the unit to function abnormally.
8. Electronic function 8.1 Abbreviation T1: Indoor ambient temperature T2: Coil temperature of indoor heat exchanger 8.2 Display function 8.2.1 Icon explanation on indoor display board. One of the following figures matches its display board . Run indicator Flash at 0.5Hz when the unit is standby. Illuminate when the unit is turned on . Timer indicator This indicator illuminates when TIMER is set ON/OFF.
8.3 Main Protection 8.3.1 Three Minutes Delay at restart for compressor 1 minute delay for the 1 time start-up and 3 minutes delay for others. 8.3.2 Temperature protection of compressor top The unit will stop working when the compressor top temp. protector cut off, and will restart after the compressor top temp.
If T4>5℃ or the compressor starts running, the preheating function will stop. 8.3.8 Zero crossing detection error protection If AC detects time interval is not correct for continuous 240s, the unit will stop and the LED will display the failure. The correct zero crossing signal time interval should be between 6-13ms. 8.4 Operation Modes and Functions 8.4.1 Fan mode (1) Outdoor fan and compressor stop.
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8.4.2 Cooling Mode 8.4.2.1 Compressor running rules The maximum operation frequency of compressor after starting submits to following rule. Fmax=F4 Fmax=F7 Fmax=F8 31.5 29.5 Fmax=F6 Fmax=F3 If users switch on AC by remote controller, the compressor will run at the Fmax frequency for 7 minutes according to the outdoor ambient temp.
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F: Keep the current frequency. G: Decrease the frequency to the lower level until to F1. H: Run at F1 for 1h.(if T1-Ts<-2℃, the compressor will stop) Meanwhile, the compressor running frequency is limited by the current. I3COOL Decrease I2COOL Hold I1COOL Resume...
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High Medium 8.4.2.4 Condenser temperature protection ---55℃<T3<60℃, the compressor frequency will decrease to the lower level until to F1 and then runs at F1.If T3<54℃, the compressor will keep running at the current frequency. ---T3<52℃, the compressor will not limit the frequency and resume to the former frequency. ---T3>60℃...
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8.4.3 Heating Mode 8.4.3.1 Compressor running rules The maximum operation frequency of the compressor after starting submits to the following rule. Fmax=F2 Fmax=F3 Fmax=F4 Fmax=F5 Fmax=F6 Fmax=F7 Fmax=F8 Fmax=F9 Fmax=F10 If users switch on AC by remote controller, the compressor will run at the Fmax frequency for 7 minutes according to outdoor ambient temp.
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+5.0 +4.5 +3.5 +3.0 +2.5 +2.0 +1.5 +1.0 +0.5 While the zones of A,B,C... are corresponding to different compressor running frequency. ΔT=0℃ as default. Note: When T1-Ts keeps in the same temp. zone for 3 minutes, the compressor will run as the below rules: A~E: Increase the frequency to the higher level until to F10.
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Hold: Keep the current frequency. Resume: No limitation for frequency. Note: When AC is in “hold” zone for 3 minutes, the compressor frequency will rise to the higher level. (The frequency will increase twice at most) 8.4.3.2 Outdoor fan running rules High 8.4.3.3 Indoor fan running rules Setting...
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Indoor fan speed can be set as high, medium, low or auto fan and the anti-cold-wind function is preferential. Auto fan action in heating mode: Medium High 8.4.3.4 Defrosting mode Condition of defrosting: ----T4>0℃, When the units are running, if the following two items are satisfied, the units start defrosting: The units run with T3<3℃...
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Defrosting action: For 9k,12k models: Frequency F2 FrequencyF8 Compressor 4-way valve Outdoor fan Indoor fan Indoor fan breeze(10s) no longer than 10m XX=60.
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For 18k,22k models: Frequency F2 Frequency F8 Compressor 4-way valve Outdoor fan Indoor fan Indoor fan breeze(10s) no longer than 10m XX=60 for 18k model, XX=90 for 22k model.
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8.4.3.5 Evaporator coil temperature protection ----T2> TEH2℃, the compressor running frequency decreases to the lower level and runs for 20s. When the frequency decreases to F2 and the T2 is still over TEH2℃ for 3 minutes, the compressor will stop. ----T2<48℃...
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8.4.5.3 Low indoor room temperature protection In drying mode, if room temperature is lower than 10℃, the compressor will stop and not resume until room temperature exceeds 12℃. 8.4.5.4 Evaporator anti-freezing protection, condenser high temperature protection and outdoor unit frequency limit are active and the same as that in cooling mode. 8.4.5.5 The outdoor fan operates the same as in cooling mode.
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8.4.7.3 Timer off. The machine will turn off automatically when reaching the setting time. 8.4.7.4 Timer on/off. The machine will turn on automatically when reaching the setting “on” time, and then turn off automatically when reaching the setting “off” time. 8.4.7.5 Timer off/on.
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8.4.10 8℃ Heating(optional) In heating operation, the preset temperature of the air conditioner can be as lower as 8℃, which keeps the room temperature steady at 8℃ and prevents household things freezing when the house is unoccupied for a long time in severe cold weather. 8.4.11 Louver Position Memory Function When starting the unit again after shutting down, its louver will restore to the angle originally set by the user, but the precondition is that the angle must be within the allowable range, if it exceeds, it will...
9. Troubleshooting 9.1 Indoor Unit Error Display Display Operation lamp flash times Timer lamp Failure EEPROM error Indoor and outdoor communication error Zero crossing detection error Indoor fan speed has been out of control Indoor room temperature sensor T1 open circuit or short circuit Evaporator coil temperature sensor T2 open circuit or short circuit...
9.2 Diagnosis and Solution 9.2.1 EEPROM parameter error diagnosis and solution(E0/F4) EEPROM: a read-only memory whose contents can be erased and reprogrammed using a pulsed voltage.
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9.2.2 Indoor / outdoor unit’s communication error diagnosis and solution(E1)
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9.2.3 Zero crossing detection error diagnosis and solution(E2) 9.2.4 Indoor fan speed has been out of control diagnosis and solution(E3)
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Index 1: 1.Indoor AC Fan Motor Measure the resistance value of each winding by using the tester. Index2: 1: Indoor AC Fan Motor Power on and set the unit running in fan mode at high fan speed. After running for 15 seconds, measure the voltage of pin1 and pin2.
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9.2.5 Open circuit or short circuit of temperature sensor diagnosis and solution(E4/E5/F1/F2/F3)
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9.2.5 IPM malfunction or IGBT over-strong current diagnosis and solution(P0)
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9.2.6 Over voltage or too low voltage protection diagnosis and solution(P1)
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9.2.7 High temperature protection of compressor top diagnosis and solution(P2)
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9.2.8 Inverter compressor drive error diagnosis and solution(P4)
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9.2.9 Refrigerant Leakage Detection diagnosis and solution(EC) Shut off the power supply and turn it on 5 seconds later. Is it still displaying the error code? Check if T2 sensor is well Is there cool air blowing fixed. Correct the installation or replace T2 sensor.
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Safety Electricity power is still kept in capacitors even the power supply is shut off. Do not forget to discharge the electricity power in capacitor. Electrolytic Capacitors (HIGH VOLTAGE! CAUTION!) Connect discharge resistance (approx.100Ω 40W) or soldering iron (plug) between +, - terminals of the electrolytic capacitor on the contrary side of the outdoor PCB.
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Temperature Sensors. Room temp.(T1) sensor, Indoor coil temp.(T2) sensor, Outdoor coil temp.(T3) sensor, Outdoor ambient temp.(T4) sensor, Compressor discharge temp.(T5) sensor. Measure the resistance value of each winding by using the multi-meter. Table1:Some frequently-used R-T data for T1,T2,T3 and T4 sensor: Temperature (℃) Resistance Value (KΩ) 26.9...
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Outdoor code 220037306370 Outdoor MOA-09CDN1-MN5W Compressor DA108X1C-23EZ Indoor fan motor RPG13B Outdoor fan YDK24-6KB motor...
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Compressor checking Measure the resistance value of each winding by using the tester. Position Resistance Value DA108X1C-23EZ DA130M1C-31FZ DA130S1C-20FZ DA150S1C-20FZ Blue - Red 0.95Ω 0.95Ω 0.95Ω 1.1Ω (20℃) (20℃) (20℃) Blue - Black (20℃) Red - Blue...
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3.IPM continuity check Turn off the power, let the large capacity electrolytic capacitors discharge completely, and dismount the IPM. Use a digital tester to measure the resistance between P and UVWN; UVW and N. Normal resistance Digital tester value (+)Red (-)Black ∞...
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