CENTRAL SPLIT AIR CONDITIONER Technical & Service Manual v3.0 HIGH EFFICENCY CONDENSING UNIT Models: • YH024GHFI18RT2 • YH036GHFI18RT2 • YH060GHFI18RT2 - R-410A REFRIGERANT - 208~230 V, 1 Phase, 60 Hz - 18 SEER IMPORTANT NOTICE: Thank you very much for purchasing this Air Conditioner. Please read this manual carefully before installing or operating your new air conditioning system. Be sure to save this manual for future reference.
SAFETY SUMMARY IMPORTANT NOTICE ● We pursue a policy of continuing improvement in design and performance of products. The right is therefore reserved to vary specifications without notice. ● We cannot anticipate every possible circumstance that might involve a potential hazard. ● This air conditioner is designed for standard air conditioning only. Do not use this air conditioner for other purposes such as drying clothes, refrigerating foods or for any other cooling or heating process.
● If circuit breaker or fuse is often activated, stop the system and contact your service contractor. ● Check that the ground wire is securely connected. If the unit is not correctly grounded, it will lead to electric shock. Do not connect the ground wiring to gas piping, water piping, lightning conductor or ground wiring for telephone. ● Before performing any brazing work, check to ensure that there is no flammable material around when using refrigerant.
Table of Contents 1. General ..................................................................................................................................................1 1.1 Features.........................................................................................................................................1 1.2 Product lineup................................................................................................................................2 1.3 Nomenclature ...................
1. GENERAL 1. General 1.1 Features 360 DC inverter driven technology With 360 all DC inverter driven technology, realize the compressor driving direction the same with rotary direction. Optimize energy-saving, and keep the compressor more stable and high efficient during operation. It can also guarantee more stable temperature control and reduce noise. Pressure sensor Inside the outdoor unit is the pressure sensor, which defects low pressure in cooling mode and high pressure in heating mode.
1. GENERAL 1.2 Product lineup Model (Btu/h) Type Outdoor unit 24K 36K 60K ● ● ● ●: available model 1.
1. GENERAL 1.4 Unit installation 1:1 system is the only compatible combination. (Only one indoor unit can be connected with one outdoor unit.) 1.5 Working range Power Supply Working Voltage 198V ~ 253V Voltage Imbalance Within a 3% deviation from each voltage at the main terminal of outdoor unit Starting Voltage Higher than 85% of the Rated Voltage Operating temperature range This air conditioner is designed for the following outdoor operating temperatures.
1. GENERAL 1.
2. SPECIFICATIONS 2. Specifications Outdoor Model Power Supply Energy Star Cooling Heating Working Temperature Range Capacity Capacity(MIN-MAX) Input Current EER EER SEER Capacity Capacity(MIN-MAX) Input Current COP COP HSPF4 Capacity Heating (Rated) at Capacity Heating(Rated) at 17°F Cooling Heating Outdoor Noise Level (Sound Pressure) H/L Design Pressure H/L ELECTRICAL DATA MIN. AMPACITY MAX.
2. SPECIFICATIONS Outdoor Model Rated Current(RLA) Compressor Refrigerant Oil AUWR-24U3SF1 9.45 VG74 /670 VG74 /22.7 R-410A 2 70.5 25 0.376 Φ9.52(3/8') Φ15.88(5/8') 50 164 30 98 A ml oz. Type Refrigerant Type/Quantity Refrigerant Piping Refrigerant Charge Factory Precharge Additional Charge for Each Ft. Liquid Line OD Vapor Line OD Max. Pipe Length Max. Difference in Level kg oz. Ft. oz. mm/in mm/in m Ft. m Ft. AUWR-36U3SA1 9.45 VG74 /670 VG74 /22.7 R-410A 2.8 98.7 25 0.376 Φ9.52(3/8') Φ19.
3. OUTLINES AND DIMENSIONS 3. Outlines and dimensions 24K Unit : in.
3. OUTLINES AND DIMENSIONS 36K 4-1/8 (105) 33-1/8(840) Unit : in.
3. OUTLINES AND DIMENSIONS 60K Unit : in.
4. ELECTRICAL DATA 4. Electrical data Power supply Outdoor unit Voltage(V) PH Applicable voltage Frequency (Hz) Umin (V) Umax (V) ELB Nominal Current (A) Nominal Sensitive Current (mA) 24K 208/230 1 60 198 253 25 30 36K 208/230 1 60 198 253 35 30 60K 208/230 1 60 198 253 60 30 NOTE: 1. The above compressor data is based on 100% capacity combination of indoor units at the rated operating frequency. 2.
5. CAPACITIES AND SELECTION DATA 5. Capacities and selection data 5.1 Capacity characteristic charts The following charts show the characteristics of outdoor unit capacity, which corresponds with the operating ambient temperature of outdoor unit. Conditions: ① Pipe length / height difference: 25 ft. (7.6m) / 0 ft. (0m) ② Compressor at rated inverter frequency ③ Indoor fan speed at high fan speed ④ Capacity loss due to white frost and defrost operation is not included.
5. CAPACITIES AND SELECTION DATA Performance data (Cooling operation at rated frequency) 36K outdoor unit matches 30K indoor unit Outdoor IWB (°F) DB IDB (°F) TC 65 S/T PI TC 75 S/T PI TC 85 S/T PI TC 95 S/T PI TC 105 S/T PI TC 115 S/T PI 70 28.1 0.99 2.11 28.1 1.00 2.34 27.7 1.00 2.64 27.3 1.00 3.17 26.7 0.99 3.77 23.9 1.00 3.84 59 75 80 28.4 29.0 1.00 1.00 2.13 2.15 28.5 29.1 1.00 0.99 2.36 2.39 28.0 28.6 1.00 1.00 2.67 2.69 27.5 28.1 1.00 1.00 3.20 3.24 27.1 27.6 1.00 1.00 3.81 3.85 24.2 24.8 1.00 1.
5. CAPACITIES AND SELECTION DATA Performance data (Cooling operation at rated frequency) 36K outdoor unit matches 36K indoor unit Outdoor IWB (°F) DB IDB (°F) TC 65 S/T PI TC 75 S/T PI TC 85 S/T PI TC 95 S/T PI TC 105 S/T PI TC 115 S/T PI 70 30.8 0.99 2.16 30.8 1.00 2.40 30.3 1.00 2.71 29.8 1.00 3.25 29.2 0.99 3.87 26.2 1.00 3.94 59 75 80 31.1 31.7 1.00 1.00 2.19 2.20 31.2 31.8 1.00 0.99 2.43 2.46 30.7 31.3 1.00 1.00 2.74 2.76 30.1 30.8 1.00 1.00 3.28 3.32 29.6 30.2 1.00 1.00 3.91 3.96 26.5 27.1 1.00 1.
5. CAPACITIES AND SELECTION DATA Performance data (Cooling operation at rated frequency) 60K outdoor unit matches 42K indoor unit Outdoor IWB (°F) DB IDB (°F) TC 65 S/T PI TC 75 S/T PI TC 85 S/T PI TC 95 S/T PI TC 105 S/T PI TC 115 S/T PI 70 43.5 0.99 3.52 43.5 1.00 3.91 42.9 1.00 4.41 42.1 1.00 5.30 41.2 0.99 6.30 37.0 1.00 6.42 59 75 80 43.9 44.8 1.00 1.00 3.56 3.59 44.1 44.9 1.00 0.99 3.95 4.00 43.3 44.2 1.00 1.00 4.45 4.50 42.6 43.5 1.00 1.00 5.34 5.41 41.8 42.7 1.00 1.00 6.37 6.44 37.4 38.3 1.00 1.
5. CAPACITIES AND SELECTION DATA Performance data (Cooling operation at rated frequency) 60K outdoor unit matches 48K indoor unit Outdoor IWB (°F) DB IDB (°F) TC 65 S/T PI TC 75 S/T PI TC 85 S/T PI TC 95 S/T PI TC 105 S/T PI TC 115 S/T PI 70 43.9 0.99 3.55 43.9 1.00 3.94 43.3 1.00 4.44 42.5 1.00 5.34 41.6 0.99 6.35 37.3 1.00 6.47 59 75 80 44.3 45.2 1.00 1.00 3.59 3.61 44.5 45.4 1.00 0.99 3.98 4.03 43.7 44.6 1.00 1.00 4.49 4.54 43.0 43.9 1.00 1.00 5.39 5.46 42.2 43.1 1.00 1.00 6.42 6.49 37.8 38.7 1.00 1.
5. CAPACITIES AND SELECTION DATA Performance data (Cooling operation at rated frequency) 60K outdoor unit matches 60K indoor unit Outdoor IWB (°F) DB IDB (°F) TC 65 S/T PI TC 75 S/T PI TC 85 S/T PI TC 95 S/T PI TC 105 S/T PI TC 115 S/T PI 70 47.7 0.99 3.63 47.7 1.00 4.04 47.1 1.00 4.55 46.3 1.00 5.47 45.3 0.99 6.51 40.6 1.00 6.63 59 75 80 48.2 49.2 1.00 1.00 3.68 3.70 48.4 49.3 1.00 0.99 4.08 4.13 47.6 48.5 1.00 1.00 4.60 4.65 46.7 47.7 1.00 1.00 5.52 5.59 45.9 46.9 1.00 1.00 6.58 6.65 41.1 42.0 1.00 1.
5. CAPACITIES AND SELECTIO N DATA 5.2 Piping length correction factor Pipe length L Indoor unit Height difference H Outdoor unit Add. Max. Height Refrigerant difference [exceed 25ft (H) 7.6m] Model Max. Pipe length (L) 24K 164ft. (50m) 98ft. (30m) 0.38(oz/ft) [35(g/m)] 36K 246ft. (75m) 98ft. (30m) 0.38(oz/ft) [35(g/m)] 60K 246ft. (75m) 98ft. (30m) 0.
5. CAPACITIES AND SELECTION DATA The correction factor of height between indoor unit and outdoor unit Height difference Factor 16ft (5m) 33ft (10m) 0.01 108ft (30m) 0.02 0.025 To ensure correct unit selection, consider the farthest indoor unit. NOTE: 1. Above data is assuming that the height difference between indoor unit and outdoor unit is 0m. 2. Be sure to minimize length of connection pipes to optimize performance.
6. SOUND PRESSURE DATA 6. Sound pressure data Outdoor unit Model 24K Test condition 3.28ft(1.0m) ahead of the unit; 2.7ft (0.83) high from the bottom of the unit; 3.28ft (1.0m) high from the ground. Model 36K Test condition 3.28ft. (1.0m) ahead of the unit; 3.28ft. (1.0m) high from the bottom of the unit.
7. REFRIGERANT CYCLE 7.
7.
7.
8. WIRING DIAGRAM 8. Wiring diagram 8.1 Electrical wiring diagram Outdoor unit 24K Electric wiring diagram 2089691.B Main control board Remark: Dashed parts are not available in some models. For details, see the table below.
8. WIRING DIAGRAM 36K Electric wiring diagram 2022241.
8. WIRING DIAGRAM 60K Electric wiring diagram 2097819.A Driver board Main control board Remark: Dashed parts are not available in some models. For details, see the table below.
8. WIRING DIAGRAM 8.2 Control board picture 24K Main control board 1 3 4 5 67 2 8 9 10 11 24 12 13 23 14 22 15 21 16 17 20 NO. 19 18 Description NO.
8. WIRING DIAGRAM 24K 7-Segment display board 2 1 8 3 4 5 7 6 NO. Description NO.
8. WIRING DIAGRAM 36K Main control board 1 2 3 4 5 6 7 21 8 20 9 10 11 19 12 13 18 NO. 17 16 Description 15 14 NO. 12 Description 1 Tube electric heater Pressure switch 2 4-way valve 13 Compressor heating protector 3 Electric heating belt L 14 Sensor Signal Out Suc. Coil Def. Diss.
8. WIRING DIAGRAM Driver board 1 2 13 3 4 5 12 6 11 10 9 8 7 NO. 1 Description NO.
8. WIRING DIAGRAM 60K Main control board 1 19 2 3 18 4 17 16 15 5 6 7 8 14 NO.
8. WIRING DIAGRAM Driver board 4 3 1 2 13 12 5 11 6 10 9 8 7 NO. Description NO.
8. WIRING DIAGRAM Filter board 1 2 5 4 3 NO. Description NO.
8. WIRING DIAGRAM 8.3 Common wiring Recommended wire size ELB Power Source Transmitting Cable Size Cable Size Model (Capacity) Power Supply 24K 208/230V ~/60Hz 25 30 3×12AWG 4×16AWG 36K 208/230V ~/60Hz 35 30 3×10AWG 4×16AWG 60K 208/230V ~/60Hz 60 30 3×8AWG 4×16AWG Rated Current Nominal Sensitive (A) Current (mA) Max. Running Current (A): REFER TO NAMEPLATE NOTE: ● Use cooper power supply wires.
9. FIELD SETTING 9. Field setting 9.1 Outdoor unit DIP switch DIP Switch Setting of Outdoor Unit (Optional setting) Turn off all power sources before setting. Without turning off, the switches settings are not refreshed and might be invalid. Mark of " " indicates the position of DIP switches.
9. FIELD SETTING Step 4: Open the maintenance panel. Step 5: Switch the dial code (referring to outdoor wiring diagram ) ON position on the main control board. Step 6: Switch on the machine power. Step 7: Check if “40” is displayed on the LED digital tube of the main control board. Step 8: When the numerals on the LED digital tube of outdoor unit count down to 0 (40 → 39 → 38 ... 0), and “0” begins to blink, close the shut-off valve of the gas piping with an Allen wrench in a clockwise direction.
9. FIELD SETTING 9.2 Running parameter query Query by 7 segment display 7 segment display Digital display switch 7-segment display Introduction 24K ● ● ● S2 S1 Select S3 Increase Decrease There are 3 buttons on the digital display board： 1) Select button: Select to display outdoor/indoor unit parameter. "P." -- Parameter of outdoor unit 2) INCREASE button：Each time it is pressed, the number rises by 1. 3) DECREASE button：Each time it is pressed, the number lowers by 1.
9. FIELD SETTING Parameters can be checked in the following table below. Parameter code Descriptions P.0 Fault codes P.1 Compressor actual frequency P.2 Compressor driving frequency P.4 Compressor target frequency P.5 Compressor exhaust temperature P.6 Outdoor suction Temperature P.7 Outdoor ambient temperature P.8 Outdoor coil temperature P.9 Outdoor defrosting temperature P.10 IPM module temperature P.11 Outdoor capacity requirement P.13 Outdoor DC Motor target speed P.
9. FIELD SETTING 36K/60K ● ● ● S2 S1 Select S3 Increase Decrease ● ● S5 S4 ● S3 Select Increase Decrease There are 3 buttons on the digital display board： 1) SWITCH button: Indoor parameters and outdoor parameters can be selected in turn by pressing it. “P.”/“H.
10. PIPING WORK AND REFRIGERANT CHARGE 10. Piping work and refrigerant charge 10.1 MAX.length allowed Indoor unit Height difference H Pipe length L Outdoor unit Add. Max. Height Refrigerant difference [exceed 25ft (H) 7.6m] Model Max. Pipe length (L) 24K 164ft. (50m) 98ft. (30m) 0.38(oz/ft) [35(g/m)] 36K 246ft. (75m) 98ft. (30m) 0.38(oz/ft) [35(g/m)] 60K 246ft. (75m) 98ft. (30m) 0.60(oz/ft) [56(g/m)] Additional refrigerant charge 24K/36K: Additional refrigerant charge= (L-25) ft×0.
10. PIPING WORK AND REFRIGERANT CHARGE 10.3 Air tight test Do use nitrogen when performing air-tight test. Connect the gauge manifold using charging hoses with a nitrogen cylinder to the check joints of the liquid line and the gas line stop valves. Perform the air-tight test. Don't open the gas line stop valves. Apply nitrogen gas pressure of 550 psig (3.8MPa). Check for any gas leakage at the flare nut connections, or brazed parts by gas leak detector or foaming agent.
11. INSTALLATION TOOLS AND INSTALLATION FLOW CHART 11. Installation tools and installation flow chart 11.1 Necessary tools and instrument list for installation No. Tool No. Tool No. Tool No.
11. INSTALLATION TOOLS AND INSTALLATION FLOW CHART 11.2 Installation flow chart Drawing audit Preparation before installation Confirm installation location of indoor unit and outdoor unit Indoor unit installation Refrigerant piping installation Drain piping installation Duct installation Heat insultation Outdoor unit installation Vacuum pumping and leakage detection Additional refrigerant charge Test run NOTE: This flow is only for reference; for details please see installation manual section.
12. CONTROL MODE 12. Control mode Control function 1. Cooling Anti-Freeze Protection The outdoor pressure sensor functions as real time temperature detector of evaporator. It prevents the indoor unit evaporator temperature becoming too low. If the indoor coil temperature is too low, the compressor will automatically start protection mode. 2.
13. SENSOR PARAMETER 13. Sensor parameter 1. THE PARAMETER OF OUTDOOR COMPRESSOR DISCHARGE TEMPERATURE SENSOR: (R0=187.25K±6.3%；R100=3.77K±2.5K；B0/100=3979K±1%) T [℃ ] -30 -29 -28 -27 -26 -25 -24 -23 -22 -21 -20 -19 -18 -17 -16 -15 -14 -13 -12 -11 -10 -9 -8 -7 -6 -5 -4 -3 -2 -1 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 Rmin [ KΩ ] 908.2603 855.3955 805.9244 759.6097 716.2320 675.5881 637.4902 601.7645 568.2499 536.7970 507.2676 497.5332 453.4748 428.9819 405.9517 384.2888 363.9047 344.7169 326.
13. SENSOR PARAMETER T [℃ ] 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 Rmin [ KΩ ] 71.2227 68.1036 65.1373 62.3155 59.6306 57.0752 54.6424 52.3258 50.1192 48.0168 46.0133 44.1034 42.2825 40.5458 38.8891 37.3084 35.7998 34.3596 32.9844 31.6710 30.4164 29.2176 28.0718 26.9765 25.9293 24.9277 23.9697 23.0530 22.1757 21.3360 20.5321 19.7623 19.0261 18.3211 17.6458 16.9986 16.3784 15.
13. SENSOR PARAMETER T [℃ ] 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 Rmin [ KΩ ] 8.0951 7.8290 7.5730 7.3264 7.0891 6.8605 6.6403 6.4282 6.2239 6.0269 5.8371 5.6542 5.4777 5.3076 5.1435 4.9853 4.8326 4.6852 4.5430 4.4058 4.2733 4.1453 4.0218 3.9024 3.7872 3.6758 3.5661 3.4601 3.3577 3.2588 3.1632 3.0708 2.9816 2.8953 2.8118 2.7311 2.6531 2.5776 2.
13. SENSOR PARAMETER 2. THE PARAMETER OF THE OTHER SENSOR: (R0=15K±2%;B0/100=3450K±2%) T [℃ ] -30 -29 -28 -27 -26 -25 -24 -23 -22 -21 -20 -19 -18 -17 -16 -15 -14 -13 -12 -11 -10 -9 -8 -7 -6 -5 -4 -3 -2 -1 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 Rmin [ KΩ ] 60.78 57.75 54.89 52.19 49.63 47.21 44.92 42.76 40.71 38.77 36.93 35.18 33.53 31.96 30.48 29.07 27.73 26.46 25.26 24.11 23.03 21.99 21.01 20.08 19.19 18.35 17.55 16.78 16.06 15.36 14.70 14.08 13.48 12.91 12.36 11.85 11.35 10.88 10.
13. SENSOR PARAMETER T [℃ ] 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 Rmin [ KΩ ] 5.667 5.449 5.240 5.048 4.864 4.687 4.517 4.355 4.198 4.048 3.904 3.766 3.663 3.506 3.383 3.265 3.152 3.043 2.938 2.838 2.741 2.648 2.558 2.472 2.389 2.309 2.232 2.158 2.087 2.018 1.952 1.888 1.827 1.767 1.710 1.655 1.602 1.551 1.502 1.452 1.409 1.364 1.322 1.280 1.241 1.202 1.165 1.129 1.095 1.061 1.
13. SENSOR PARAMETER T [℃ ] 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 Rmin [ KΩ ] 0.8570 0.8316 0.8071 0.7834 0.7604 0.7382 0.7167 0.6958 0.6755 0.6560 0.6371 0.6188 0.6011 0.5840 0.5674 0.5514 0.5359 0.5209 0.5064 0.4923 0.4787 0.4655 0.4528 0.4404 0.4284 0.4168 0.4056 0.3947 0.3841 0.3739 0.3640 0.3544 0.3450 0.3360 0.3272 0.3187 0.3104 0.3024 0.2947 0.2871 0.2798 0.2727 Rnom [ KΩ ] 0.9246 0.8977 0.
14.TROUBLESHOOTING 14. Troubleshooting 14.1 Trouble guide Troubleshooting for normal malfunction Troubleshooting Possible Reasons of Abnormality 1. Power supply failure; 2. Trip of breaker or blow of fuse； 3. Power voltage is too low; Air conditioner can not start up 4. Improper setting of remote controller ; 5. Remote controller is short of power. The compressor starts or stops frequently Poor cooling/heating How to Deal With 1. Check power supply circuit; 2.
17.TROUBLESHOOTING Outdoor unit 24K DC-Inverter unitary (Main control board upside-down) Fault code displayed by LED lamps on outdoor main control board. There are 3 LED lamps on control board, LED1, LED2 and LED3. LED1 indicates fault code represented by 2-digit number, LED2 indicates fault code represented by single digit number and LED3 indicates outdoor drive control fault. When LED3 is off, LED1 and LED 2 indicate main control fault code.
14.TROUBLESHOOTING 36K/60K Main control fault display Fault code will be displayed by 7 segment display on main control board. : Show failure occur. Display ERROR code. Drive fault code display The lamp of drive board flashing shows failure occurs. How many times the drive failure lamp flick will show the failure code.
14.TROUBLESHOOTING 14.2 Fault codes The following is the fault code table of outdoor units. Table 1 Outdoor fault code Fault code 1 2 3 Fault description Possible reasons for abnormality 1.Reconnect the outdoor ambient temperature sensor; 1.The outdoor ambient temperature 2.Replace the outdoor ambient Outdoor ambient sensor is connected loosely; temperature sensor temperature sensor 2.The outdoor ambient temperature components; fault sensor fails to work; 3.Replace the outdoor control 3.
14.TROUBLESHOOTING Fault code 13 14 15 Fault description Possible reasons for abnormality 1. The wiring of the overload protector is connected loosely. 2. The overload protector fails . 3. The refrigerant is not enough; Compressor overheat 4. The installation pipe is much protector device longer than the normal one, but extra refrigerant is not added ; 5. The expansion valve fails; 6. The outdoor control board fails.
14.TROUBLESHOOTING Fault code 45 46 47 48 49 91 Fault description Possible reasons for abnormality There are many reasons for this failure. You can check the driver board fault LED to further analyze the fault code of the drive board and IPM fault to learn about what leads to the fault and how to operate it. Specific information can be seen in table 5, table 6. 1.The cable between the control board and the driver board is connected loosely; IPM and control board 2.
14.TROUBLESHOOTING NOTE 1: If the indoor unit can not start or the indoor unit stops itself after 30s, at the same time the unit does not display the fault code, please check the fire and the socket of the control board. NOTE 2: If the indoor unit displays the 75,76,77,78 fault code after you turn on the unit, please check the TEST seat of the indoor control board or the TEST detection circuit to see whether short circuit occurs. NOTE 3: Overload in cooling mode Overload in cooling mode sr.
17.TROUBLESHOOTING Table 2 Drive fault code (24K) Fault code 1 2 3 4 Fault description 7 8 9 Inverter DC voltage overload fault Inverter DC low voltage fault Inverter AC current overload fault Out-of-step detection Loss phase detection fault (speed pulsation) Loss phase detection fault (current imbalance) Inverter IPM fault (edge) Inverter IPM fault (level) PFC_IPM IPM fault (edge) 10 PFC_IPM IPM fault (level) 11 PFC power detection of failure 5 6 Possible reasons for abnormality 1.
14. TROUBLESHOOTING Table 3 Drive fault code (36K/60K) Fault code 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 Fault description Q axis current detection, failure in drive control Possible reasons for abnormality 1. Compressor wire is not connected properly; 2. Bad driver board components; 3. Compressor start load is too large; 4. Compressor demagnetization; 5. Compress or oil shortage serious wear of crankshaft; 6. The compressor insulation fails. How to deal with 1.
14.TROUBLESHOOTING Fault code 16 18 19 20 21 Fault description Low DC voltage 200V Driver board read EE data error PFC chip receives data fault PFC soft start abnormally The compressor drive chip could not receive data from PFC chip. Possible reasons for abnormality How to deal with 1. Voltage input is too low; 2. Drive board fault. 1. EEPROM has no data or data error; 2. EEPROM circuit fault. 1. Check the power supply. 2. Change the driver board. 1. Change EEPROM component; 2. Change the driver board.
15. CHECKING COMPONENTS 15. Checking components 15.1 Check refrigerant system TEST SYSTEM FLOW Conditions: ① Compressor is running. ② The air condition should be installed in good ventilation. Tool: Pressure Gauge Technique: ① see ② feel ③ test See ----- Tube defrost. Feel ----- The difference between the temperature of tubes. Test ----- Test pressure.
15. CHECKING COMPONENTS Test system flow Cooling mode NO Test system pressure. Is the low pressure normal at service part ? The pressure on the high side. Recharge refrigerant after air purging with the vacuum pump. Is the low pressure normal over again? The pressure on the low side. If the pressure is close to static pressure? NO yes The system needs refrigerant.The service people must add refrigerant. Does the low pressure rise ? yes Air remains at the refrigerant system.
15. CHECKING COMPONENTS 15.2 Check parts unit 1. Outdoor unit fan motor DC motor 24K: ZWK511A805001 36K/60K: SIC-71FW-F8121-1 2. Compressor Compressor examination and repairing 24K/36K: EATF250D22UMT 60K: EATF400D64UMTA Thermal Sensor Power DC Inverter & Controller Compressor Test in resistance. TOOL: Multi-meter. Test the resistance of the winding. The compressor fails if the resistance of winding is 0 (short circuit)or∞(open circuit). Familiar error: 1) Compressor motor lock.
15. CHECKING COMPONENTS NOTES： 1) Don’t put a compressor on its side or turn over. 2) Please assemble the compressor in your air conditioner rapidly after removing the plugs. Don’t place the comp. in air for a long time. 3) Avoid compressor running in reverse caused by connecting electrical wire incorrectly. 4) Warning! In case AC voltage is impressed to compressor, the compressor performance will decrease because of its rotor magnetic force decreasing. 3.
16. DISASSEMBLY AND ASSEMBLY FOR COMPRESSOR AND MOTOR 16. Disassembly and assembly for compressor and motor The special tools for compressor & motor disassembly and assembly： Tool Hexagon Screwdriver 1 Hexagon Socket 2 Outdoor unit 24K Important: Before disassembly and assembly, make sure that the power to the system has been disconnected and verified as voltage free. Step Illustration Handling Instruction 1. Remove external casing 1. Remove the top cover, handle and valve cover; 2.
16. DISASSEMBLY AND ASSEMBLY FOR COMPRESSOR AND MOTOR Outdoor unit 36K Important: Before disassembly and assembly, make sure that the power to the system has been disconnected and verified as voltage free. Step Illustration Handling Instruction 1. Remove external casing 1. Remove the top cover, handle and valve cover; 2. Remove the outer case and right side plate. 2. Remove motor 1. Remove the blade nut and then remove the blade; 2. Remove the motor from motor supporter. 1.
16. DISASSEMBLY AND ASSEMBLY FOR COMPRESSOR AND MOTOR Outdoor unit 60K Important: Before disassembly and assembly, make sure that the power to the system has been disconnected and verified as voltage free. Step Illustration Handling Instruction 1. Remove the top cover, handle and valve cover. 1. Remove external casing 2. Remove the outer case and Right side plate. 1. Remove the blade nut and then remove the blade. 2. Remove motor 2. Remove the motor from motor supporter. 1.
17. CONTORL LOGIC DESCRIPTION 17. Control logic description 17.1 An illustration to outdoor unit signal (1) Communication between indoor and outdoor units: The communication between the outdoor unit, thermostat and the indoor unit is achieved through 24V alternating current, as shown in figure below. The thermostat controls the signal output of Y and B, and the outdoor unit identifies its operation mode according to these two signals.
17. CONTORL LOGIC DESCRIPTION Compressor running rules: When the unit starts up in cooling mode, the compressor starts to work, and adjust its operating frequency according to the system target pressure and the actual pressure. If the actual pressure is higher than the target pressure, the compressor frequency will rise; if the actual pressure is lower than the target pressure, the compressor frequency decreases; when the target pressure is reached, the compressor frequency will keep stable.
17. CONTORL LOGIC DESCRIPTION ③ When the compressor signal and 4-way valve signal received from the thermostat are high level, that is Y-C and B-C are high level, the unit restores the normal target pressure to operate or when the compressor has operated for 30min【e2】with the decreased target pressure, it is taken as it has stopped operating.
17. CONTORL LOGIC DESCRIPTION 17.5 Condenser High-temperature Protection DC-Inverter outdoor unit AC will enter T3 protection if any of the following conditions is satisfied. Condition1: Cooling mode: When the outdoor coil temp. T3 keeps higher than T2 for 10 seconds, the compressor and outdoor fan will shut off. When T3 is lower than T1, the compressor and outdoor fan will restart up.
Product improvement, specifications and appearance in this manual are subject to change without prior notice.
