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 Installation Do not use a defective or underrated circuit breaker.
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. Be sure the installation area does not deteriorate with age.
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.
Keep level even when installing the product. 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.
damage. Do not insert hands or other object through air inlet or outlet while the product is 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.
2. Function Model Names of Indoor/Outdoor Units Capacity Model Indoor units Outdoor units WYB009AMFI WB009AMFI WN009AMFI DC Inverter WYB0129AMFI WB0129AMFI WN0129AMFI WYB018GMFI WB018GMFI WN018GMFI WYB024GMFI WB024GMFI WN024GMFI...
Indoor unit Operation by remote controller Anti-freezing control in cooling Prevent the water being frozen on evaporator by checking the evaporator pipe temperature Golden fin (Optional) Time Delay Safety control Ionizer + (Optional) Indoor fan speed control Turbo, high, med, low, breeze. Current protection Two-direction air vane Low ambient cooling (Optional)
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.
3.2 Outdoor Units More than 30cm More than 60cm (Service space More than 30cm More than 60cm More than 70cm W(mm) D(mm) H(mm) W1(mm) A(mm) B(mm) Model (29.92in) (11.22in) (23.23in) (32.40in) (20.87in) (11.42in) (33.27in) (12.60in) (27.56in) (35.75in) (22.05in) (13.19in)
6. Installation details 6.1 Wrench torque sheet for installation Outside diameter Torque Additional tightening torque inch N.cm N.cm Ф6.35 1500(153kgf.cm) 1600(163kgf.cm) Ф9.52 2500(255kgf.cm) 2600(265kgf.cm) Ф12.7 3500(357kgf.cm) 3600(367kgf.cm) Ф16 4500(459kgf.cm) 4700(479kgf.cm) Ф19 6500(663kgf.cm) 6700(683kgf.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...
6.3 Pipe length and the elevation The pipe length and refrigerant amount: Model Connective Air purging method Additional amount of refrigerant to be charged pipe length Less than 5m Use vacuum pump ------------------ 9K/12K More than 5m Use vacuum pump (Pipe length –...
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. ●...
Confirm that the gauge needle does not move (approximately 5 minutes after turning off the vacuum pump). 7) Turn the flare nut of the 3-way valves about 45° counterclockwise for 6 or 7seconds after the gas coming out, then tighten the flare nut again. Make sure the pressure display in the pressure indicator is a little higher than the atmosphere pressure.
Be sure to use a hexagonal wrench to operate the valve stems. 7). Mount the valve stems nuts and the service port cap. Be sure to use a torque wrench to tighten the service port cap to a torque 18N∙m. Be sure to check the gas leakage.
6.5 Adding the refrigerant after running the system for many years Electronic scale Procedure: 1). Connect the charge hose to the 3-way service port, open the 2-way valve and the 3-way valve. Connect the charge hose to the valve at the bottom of the cylinder. If the refrigerant is R410A, make the cylinder bottom up to ensure liquid charge.
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).
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).
6.7 Re-installation while the outdoor unit need to be repaired 1. Evacuation for the whole system Procedure: 1). Confirm that both the 2-way and 3-way valves are set to the opened position. 2). Connect the vacuum pump to 3-way valve’s service port. 3).
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.
7. Operation characteristics 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. 2. Room relative humidity less than 80%. If the air conditioner operates in excess of this figure, the surface of the air conditioner may attract condensation.
8. Electronic function 8.1 Abbreviation T1: Indoor room temperature T2: Coil temperature of evaporator T3: Coil temperature of condenser T4: Outdoor ambient temperature T5: Compressor discharge temperature 8.2 Display function 8.2.1 Icon explanation on indoor display board. OPERATION indication lamp: This lamp illuminates when the air conditioner is in operation.
DEFROST indication lamp (For cooling & heating models only): Lights up when the air conditioner starts defrosting automatically or when the warm air control feature is activated in heating operation. DIGITAL DISPLAY: Displays the current setting temperature and malfunction/protection code when the air conditioner is in operation.
When the unit starts up, the louver will be active immediately and the indoor fan will open 10s later. If the unit runs in heating mode, the indoor fan will be also controlled by anti-cold wind function. 8.3.7 Compressor preheating functions Preheating permitting condition: If T4(outdoor ambient temperature)＜3℃...
8.4.2 Cooling Mode 18.104.22.168 Compressor running rules: The operation frequency of compressor after starting submits to following rule. Fmax=F4 Fmax=F7 Fmax=F8 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.
A~E: Increase the frequency to the higher level until to F8. 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...
High Medium 22.214.171.124 Condenser high temperature T3 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℃...
8.4.3 Heating Mode 126.96.36.199 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.
+5.0 +4.5 +3.5 +3.0 +2.5 +2.0 +1.5 +1.0 +0.5 While Temp. zone Frequency ΔT=0 as factory setting. 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. F: Keep the current frequency.
I3HEAT Decrease I2HEAT Hold I1HEAT Resume Off: Compressor stops. Decrease: Decrease the running frequency to the lower level. 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) 188.8.131.52 Outdoor fan running rules: High...
184.108.40.206 Indoor fan running rules: Setting Breeze If the compressor stops caused by the room temperature rising, the indoor fan will be forced to run 127 seconds with breeze. During this period, the anti-cold-wind is disabled. If the machine runs in rating capacity test mode, the indoor fan will run with rating speed and the anti-cold-wind function is disabled.
minutes. While TCDI －6℃. ----T4＜0℃, If the 1 condition and 2 condition items are satisfied, then the program judges if T2 has decreased more than 5℃.When T2 has decreased more than 5℃, enter the defrosting mode. ----No matter what value T4 is, if the machine runs with T3＜3℃ for more than 120 minutes and T3 keeps lower than TCDI+4℃...
Defrosting action： For 18k, 24k models: Model...
For other models: 220.127.116.11 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.
Indoor fan will run at auto fan of the relevant mode. The louver operates same as in relevant mode. If the machine switches mode between heating and cooling, the compressor will keep stopping for 15 minutes and then choose mode according to T1-Ts. If the setting temperature is modified, the machine will choose running function again.
18.104.22.168 Operation rules: Forced cooling mode: The compressor runs at F2 frequency and indoor fan runs as breeze. After running for 30 minutes, the machine will turn to auto mode as 24℃ setting temperature. Forced auto mode: The action of forced auto mode is the same as normal auto mode with 24℃ setting temperature. 8.4.7 Timer function 22.214.171.124 Timing range is 24 hours.
8.4.9 Auto-Restart function The indoor unit is equipped with auto-restart function, which is carried out through an auto-restart module. In case of a sudden power failure, the module memorizes the setting conditions before the power failure. The unit will resume the previous operation setting (not including swing function) automatically after 3 minutes when power returns.
9. Troubleshooting 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 sensor or outdoor unit EEPROM parameter error Open or short circuit of room or evaporator temperature sensor Outdoor fan speed out of control IBM malfunction or IGBT over-strong current protection...
9.2 Diagnosis and Solution 9.2.1 EEPROM parameter error diagnosis and solution Shut off the power supply and turn on it 5s later The problem comes out again Is the EEPROM chip plugged in indoor PCB well? Correct the connection Replace the main PCB of indoor unit...
9.2.2 Indoor unit and outdoor unit communication protection error diagnosis and solution Power off, then power on the A/C by the breaker.(reconnect the power wire). Is the E1 extinguished? Check the wiring on the outdoor terminal and indoor terminal follow the wiring diagram.
9.2.3 Fan speed has been out of control diagnosis Shut off the power supply and turn on it 5s later The unit does not work normally Turn off the unit, rotate the cross Disassemble the connection between fan. Does it rotate freely? fan and motor, check if the bearing is normal.
9.2.5 IGBT over-strong current protection diagnosis and solution Check whether the connections between outdoor PCB and IPM are good? Check whether the IPM is fixed to radiator Fastening the IPM to the radiator tightly The unit does not work normally Replace the compressor Replace the IPM 9.2.6 Over voltage or too low voltage protection diagnosis and solution...
9.2.8 Inverter compressor drive error diagnosis and solution Is the connection of compressor good? Is the wiring sequence right? The Reconnect and retry voltage range proper? Replace the outdoor PCB Replace inverter compressor. 9.2.9 Zero crossing detection error 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.