Hisense AMW2-12U4RRA Technical & Service Manual
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Hisense AMW2-12U4RRA Technical & Service Manual

Multi-split typeair conditioners
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TECHNICAL & SERVICE MANUAL
Models:
<Outdoor Unit>
AMW2-12U4RRA
AMW2-14U4RRA
AMW2-18U4RXA
AMW3-21U4RFA
AMW3-24U4RFA
AMW3-24U4RAA
AMW4-27U4RAA
AMW4-36U4RAA
AMW 5-42U4RTA
R32
R410A
R410A
R410A
—MULTI-SPLIT TYPE AIR CONDITIONERS
V5.0

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Summary of Contents for Hisense AMW2-12U4RRA

  • Page 1 R410A R410A R410A TECHNICAL & SERVICE MANUAL V5.0 —MULTI-SPLIT TYPE AIR CONDITIONERS Models: <Outdoor Unit> AMW2-12U4RRA AMW2-14U4RRA AMW2-18U4RXA AMW3-21U4RFA AMW3-24U4RFA AMW3-24U4RAA AMW4-27U4RAA AMW4-36U4RAA AMW 5-42U4RTA...
  • Page 2 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. ●...
  • Page 3 ● 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.

  • Page 4: Table Of Contents

    Multi-Split Type Air Conditioner Ser vice Manual Table of Contents 1. General ..............................1 1.1 Features............................1 1.2 Product lineup ..........................3 1.3 Nomenclature ..........................3 1.4 Unit installation ..........................4 1.5 Working range..........................4 1.6 Product appearance ........................5 2. Specifications ............................7 3. Outlines and dimensions ........................9 4.

  • Page 5: General

    1. GENERAL 1. General 1.1 Features  Twin Rotary DC Inverter Compressor The twin rotary inverter compressor design reduces friction during operation for smoother rotation with less vibration, while also preventing leakage of refrigerant gas during compression. The result is a far quieter and more efficient air conditioner.
  • Page 6 1. GENERAL  Comfortable temperature control DC inverter power control uses its full capacity at startup to cool/warm quickly. As soon as the set temperature is reached, it carefully adjusts current frequency to prevent temperature fluctuation and energy loss.  Long piping lengths for installation flexibility The ample maximum piping length of 60 m permits more freedom in the placement of air conditioner units and enables you to optimise interior space.

  • Page 7: Product Lineup

    1. GENERAL 1.2 Product lineup Outdoor Unit Model(Btu/h) Type ● ● ● Dual ● ● Trio ● ● Quattro ● Up to 5 indoor units ● --- available model 1.3 Nomenclature A M W 2- 14 U 4 R R A Version Outdoor Unit Code Refrigerant type...

  • Page 8: Unit Installation

    1. GENERAL 1.4 Unit installation With the DC inverter technology, one outdoor unit can be connected with 5 indoor units at most. The combination rate range is from 80% to 130%. Model (Btu/h) Max. Combined Quantity of Indoor Units 12K/14K/18K 21K/24K 27K/36K 1.5 Working range...

  • Page 9: Product Appearance

    1. GENERAL 1.6 Product appearance Outdoor Unit Type Capacity (Btu/h) View 12K/14K Dual 21K/ AMW3-24U4RFA Trio AMW3-24U4RAA Quattro 27K/36K...
  • Page 10 1. GENERAL Type Capacity (Btu/h) View 1 to 5 indoor units...

  • Page 11: Specifications

    2 indoor units up to 2 indoor units up to 2 indoor units up to 3 indoor units up to3indoor units up to 3 indoor units up to 4 indoor units up to 4 indoor units up to 5 indoor units EU Model Name 2AMW35U4RRA 2AMW42U4RRA 2AMW50U4RXA 3AMW60U4RFA 3AMW72U4RFA 3AMW70U4RAA 4AMW81U4RAA 4AMW105U4RAA 5AMW125U4RTA Model Name AMW2-12U4RRA AMW2-14U4RRA AMW2-18U4RXA AMW3-21U4RFA AMW3-24U4RFA AMW3-24U4RAA AMW4-27U4RAA AMW4-36U4RAA AMW5-42U4RTA Performance Pdesign 10.0 12.5...
  • Page 12 2 indoor units up to 2 indoor units up to 2 indoor units up to 3 indoor units up to3indoor units up to 3 indoor units up to 4 indoor units up to 4 indoor units up to 5 indoor units EU Model Name 2AMW35U4RRA 2AMW42U4RRA 2AMW50U4RXA 3AMW60U4RFA 3AMW72U4RFA 3AMW70U4RAA 4AMW81U4RAA 4AMW105U4RAA 5AMW125U4RTA Model Name AMW2-12U4RRA AMW2-14U4RRA AMW2-18U4RXA AMW3-21U4RFA AMW3-24U4RFA AMW3-24U4RAA AMW4-27U4RAA AMW4-36U4RAA AMW5-42U4RTA Anti electric shock Class I Class I...

  • Page 13: Outlines And Dimensions

    3.OUTLINES AND DIMENSIONS 3. Outlines and dimensions 12K/14K (Unit:mm) Electric box Gas pipe Liquid pipe Air inlet Drain pipe 4-11 ×17 Hole Air outlet...
  • Page 14 3.OUTLINES AND DIMENSIONS (Unit:mm) Electric box Gas pipe Liquid pipe Air inlet Drain pipe 4-11 ×17 Hole Air outlet...
  • Page 15 3.OUTLINES AND DIMENSIONS 21K/AMW3-24U4RFA (Unit:mm)
  • Page 16 3.OUTLINES AND DIMENSIONS AMW3-24U4RAA (Unit:mm)
  • Page 17 3.OUTLINES AND DIMENSIONS (Unit:mm)
  • Page 18 Unit：mm...

  • Page 19: Electrical Data

    4. ELECTRICAL DATA 4. Electrical data Power supply Applicable voltage Nominal Outdoor Nominal Frequency Voltage(V) Umin(V) Umax(V) Sensitive (Hz) unit Current(A) Current(mA) 12K/14K/18K 220-240 21K/24K/ 220-240 27K/36K 220-240 NOTE: 1. The above compressor data is based on 100% capacity combination of indoor units at the rated operating frequency.

  • Page 20: Capacities And Selection Data

    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 : 5m / 0m ②...
  • Page 21 5. CAPACITIES AND SELECTION DATA COOLING CAPACITY (W) Indoor temperature Outdoor temperature (℃ DB) (℃ DB) (℃ WB) 4264 4420 4472 4628 4680 4160 3484 5512 5460 5408 5304 5200 4680 3796 5460 5720 5668 5720 5824 5200 4160 (℃ DB) : Dry Bulb Temperature (℃) (℃...
  • Page 22 5. CAPACITIES AND SELECTION DATA HEATING CAPACITY (W) Indoor temperature Outdoor temperature (℃ DB) (℃ DB) 5544 6178 6970 7128 7128 7207 7286 5702 6415 7128 7762 8158 8712 8554 5940 7128 7920 8712 9108 9742 7762 (℃ DB) : Dry Bulb Temperature (℃) (℃...
  • Page 23 5. CAPACITIES AND SELECTION DATA COOLING CAPACITY (kW) Indoor temperature Outdoor temperature (℃ DB) (℃ DB) (℃ WB) 8200 8500 8600 8900 9000 8000 6700 10600 10500 10400 10200 10000 9000 7300 10500 11000 10900 11000 11200 10000 8000 (℃ DB) : Dry Bulb Temperature (℃) (℃...

  • Page 24: Piping Length Correction Factor

    5. CAPACITIES AND SELECTION DATA 5.2 Piping length correction factor Pipe length L Indoor unit Height difference H Outdoor unit The correction factor is based on the equivalent piping length in meters (EL) and the height between outdoor and indoor units in meters (H). Height between indoor unit and outdoor unit (m).
  • Page 25 5. CAPACITIES AND SELECTION DATA The correction factor of height between indoor unit and outdoor unit Height difference 0.95 0.88 Factor To ensure correct unit selection, consider the farthest indoor unit. NOTE: Above data is assuming that the height difference between indoor unit and outdoor unit is 0m. Be sure to minimize length of connection pipes to optimize performance.

  • Page 26: Correction Factors According To Defrosting Operation

    5. CAPACITIES AND SELECTION DATA 5.3 Co o rrection factors a a ccordin g g to defro sting ope e ration The hea a ting capaci t t y in the pre ceding par a a graph, excl udes the co ndition of th e frost or th defrostin n g operatio...

  • Page 27: Sound Pressure Data

    6.SOUND PRESSURE DATA 6. Sound pressure data Model Model 12K/14K 1.0m ahead of the unit; 0.92m high from 1.0m ahead of the unit; 0.92m high from the bottom of the unit; 1.0m high from Test condition Test condition the bottom of the unit; 1.0m high from the the ground.
  • Page 28 6. SOUND PRESSURE DATA 27K/36K Model Model 1.0m ahead of the unit; 0.92m high 1.0m ahead of the unit; 1.0m high from Test condition Test condition from the bottom of the unit; 1.0m high the ground. from the ground. NC-70 NC-65 NC-60 NC-55...

  • Page 29: Refrigerant Cycle

    7. REFRIGERANT CYCLE 7. Refrigerant cycle 12K/14K/18K 21K/24K...
  • Page 30 7. REFRIGERANT CYCLE 27K/36K INDOOR UNIT OUTDOOR UNIT UNIT A 4-WAY VALVE UNIT B UNIT C UNIT D COMPRESSOR UNIT D UNIT C UNIT B UNIT A FILTER Cooling cycle Heating cycle Ambient Temperature Sensor Ambient Temperature Water Level Switch Ambient Temperature Water Level Switch Muffler...

  • Page 31: Wiring Diagram

    8. WIRING DIAGRAM 8. Wiring diagram 8.1 Electrical wiring diagram 12K/14K/18K...
  • Page 32 8. WIRING DIAGRAM 21K/AMW3-24U4RFA Electric wiring diagram 1982504.D...
  • Page 33 8. WIRING DIAGRAM AMW3-24U4RAA Electric wiring diagram 1957327.B...
  • Page 34 8. WIRING DIAGRAM 27K/36K...
  • Page 35 8. WIRING DIAGRAM 1(L) 2(N) 4(SI) 1(L) 2(N) 4(SI) 1 2 3 4 1 2 3 4 1(L) 2(N) 4(SI) 1(L) 2(N) 4(SI) 1 2 3 9 10 1 2 3 4 5 6 9 10 3 4 5 3 4 5 3 4 5 3 4 5 3 4 5...

  • Page 36: Control Board Picture

    8. WIRING DIAGRAM 8.2 Control board picture 12K/14K/18K Reactor L1 Compressor Reactor L2 Compressor Compressor motor Checker/ Discharge Computer sensor coil/suction/air sensor compressor overheat GasB SI-B switch sensor liquidA/liquidB/ GasA sensor SI-N AC NIN AC LIN SI-A Electronic Electronic expansion expansion valve a valve B...
  • Page 37 8. WIRING DIAGRAM AMW3-24U4RAA /27K/36K Main control board Signal to filter board DC power Communicaiton To uint D Communication N To uint C power To uint B To uint A Checker/ Computer Outdoor/ suction/coil Electronic LiquidD C/B/A Pressure sensor expansion valve B Electronic sensor sensor...
  • Page 38 8. WIRING DIAGRAM 21K/AMW3-24U4RFA Main control board Electronic Electronic Electronic Driver EE data socket DC motor expansion valve C expansion valve B expansion valve A Select switch signal from maintenance Board to indoor Com pressor W Main EE data socket Com pressor V 4-way valve Compressor U...
  • Page 39 8. WIRING DIAGRAM Maintenance board Select switch signal to mainboard Communication signal to main board...
  • Page 40 8. WIRING DIAGRAM Main control board Relay control Crankcase Crankcase AC power SI-N Contactor 4-way valve signal heater-L heater-N SI-E SI-D SI-C SI-B SI-A Electronic expansion EEPROM valve B Checker/ Computer Electronic expansion LiqC/GasC/ valve D LiqD/GasD sensor Discharge/ defrost/coil/ suction/ ambient sensor...

  • Page 41: Common Wiring

    8. WIRING DIAGRAM 8.3 Common wiring Electrical wiring diagram Outdoor unit Terminal Terminal A 1(L) 1(L) Power connecting cord Indoor unit A 2(N) Note: For some indoor units 2(N) Terminal 4(SI) 4(SI) Terminal B Outdoor unit Indoor unit 1(L) 1(L) Power connecting cord Indoor unit B 2(N)
  • Page 42 8. WIRING DIAGRAM ● Pay attention to the following items while the system is running. Do not touch any of the parts by hand at the discharge gas side, since the compressor chamber and the pipes at the discharge side are heated higher than 90℃. Note：...

  • Page 43: Field Setting

    9. FIELD SETTING 9. Field Setting 9.1 DIP Setting 21K/AMW3-24U4RFA/42K Dip Switch Setting of Outdoor Unit Mark of " " indicates the position of dip switches. Switch is valid when is ON. Refrigerant collection function By default setting is OFF. OFF ----normal mode ON----refrigerant collection mode When the power is ON, the dial changed from OFF to ON, enters into refrigerant collection mode.
  • Page 44 9. FIELD SETTING 9.2 Running Parameter Query AMW3-24U4RAA/27K/36K Outdoor Running parameters can be checked by 7 segment display 7 segment display Digital Display Switch Outdoor control board For AMW3-24U4RAA /27K/36K: There are 3 buttons on the digital display board： 1) Select button: Select the corresponding parameters of the serial number when it is pressed 2) INCREASE button：Each time it is pressed, the number rises by 1.

  • Page 45: Running Parameter Query

    9. FIELD SETTING Parameters can be checked as following table below. Note： (1) ●:Valid； ○: Invalid. (2) The right is therefore reserved to EE changing without notice. Parameter Descriptions Dual Trio Quattro Note code Display limit frequency or frequency reduction when Compressor running; ●...
  • Page 46 9. FIELD SETTING For 21K/AMW3-24U4RFA/42K There are 3 buttons on the digital display board： 1) Select button: Select to display outdoor/indoor unit parameter. "P." -- Parameter of outdoor unit "A." -- Parameter of indoor unit A "b." -- Parameter of indoor unit B "C."-- Parameter of indoor unit C "d."-- Parameter of indoor unit D "E."-- Parameter of indoor unit E...
  • Page 47 9. FIELD SETTING Parameter Descriptions Dual Trio Quattro 1 by 5 Code Unit A fault codes ● ● ● ● Unit A valve actual opening ● ● ● ● Unit A liquid pipe temperature ● ● ● ● Unit A gas pipe temperature ●...

  • Page 48: Piping Work And Refrigerant Charge

    10. PIPING WORK AND REFRIGERANT CHARGE 10. Piping work and refrigerant charge 10.1 Max. pipe length allowed Indoor unit Pipe length E Outdoor unit Pipe length A 12K/14K/ Model 21K/24K 27K/36K Item Piping to each indoor unit ≤15 ≤20 ≤20 ≤20 (A/B/C/D/E) Total length of piping between...

  • Page 49: Air Tight Test

    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.

  • Page 50: Installation Tools And Installation Flow Chart

    11. INSTALLATION TOOLS AND INSTALLATION FLOW CHART 11. Installation tools and installation flow chart 11.1 Necessary tools and instrument list for installation Tool Tool Tool Tool Handsaw Copper Pipe Bender Spanner Leveler Phillips Clamper for Solder- Manual Water Pump Charging Cylinder Screwdriver less Terminals Hoist...

  • Page 51: Installation Flow Chart

    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 Drain piping Duct installation Electrical wiring installation installation Heat insultation Outdoor unit installation Vacuum pumping and leakage detection Additional refrigerant charge...

  • Page 52: Control Mode

    12. CONTROL MODE 12. Control mode 1) Cooling Anti-freeze Protection To prevent freezing caused by too low temperature of indoor evaporator, the air conditioner will implement real-time detection over the indoor coil temperature. If the indoor coil temperature is too low, the compressor will be prohibited from increasing the frequency or decrease the frequency even shut down automatically 2) Heating Overload Protection...
  • Page 53 12. CONTROL MODE b. Mode conflict The operating mode of outdoor unit is decided by the operating mode of the indoor unit firstly booted. Indoor unit subsequently booted will firstly determine whether it’s own mode is conflict with the outdoor mode. If so, the indoor unit will automatically shut down after three beeps; If there is no conflict, the indoor unit will boot normally.

  • Page 54: Sensor Parameter

    13. SENSOR PARAMETER 13. Sensor parameter 1. THE PARAMETER OF OUTDOOR COMPRESSOR DISCHARGE TEMPERATURE SENSOR: =187.25K±6.3%；R =3.77K±2.5K；B0/100=3979K±1%） （R Rmin [ KΩ ] Rnom [ KΩ ] Rmax [ KΩ ] DR(MIN)% DR(MAX)% T [℃ ] 908.2603 985.5274 1065.1210 -7.84 7.47 855.3955 927.6043 1001.9150...
  • Page 55 13. SENSOR PARAMETER T [℃ ] Rmin [ KΩ ] Rnom [ KΩ ] Rmax [ KΩ ] DR(MIN)% DR(MAX)% 71.2227 75.3122 79.3848 -5.43 5.13 68.1036 71.9808 75.8414 -5.39 5.09 65.1373 68.8141 72.4746 -5.34 5.05 62.3155 65.8032 69.2746 -5.30 5.01 59.6306 62.9395 66.2324...
  • Page 56 13. SENSOR PARAMETER T [℃ ] Rmin [ KΩ ] Rnom [ KΩ ] Rmax [ KΩ ] DR(MIN)% DR(MAX)% 8.0951 8.3705 8.6440 -3.29 3.16 7.8290 8.0926 8.3544 -3.26 3.13 7.5730 7.8252 8.0758 -3.22 3.10 7.3264 7.5679 7.8078 -3.19 3.07 7.0891 7.3202 7.5499...
  • Page 57 13. SENSOR PARAMETER 2. THE PARAMETER OF THE OTHER SENSOR IN INDOOR AND OUTDOOR UNIT： =15K±2%；B0/100=3450K±2%） （R T [℃ ] Rmin [ KΩ ] Rnom [ KΩ ] Rmax [ KΩ ] DR(MIN)% DR(MAX)% 60.78 64.77 68.99 -6.16 6.12 57.75 61.36 65.16 -5.88...
  • Page 58 13. SENSOR PARAMETER T [℃ ] Rmin [ KΩ ] Rnom [ KΩ ] Rmax [ KΩ ] DR(MIN)% DR(MAX)% 5.667 5.882 6.103 -3.66 3.62 5.449 5.664 5.886 -3.80 3.77 5.240 5.456 5.678 -3.96 3.91 5.048 5.260 5.478 -4.03 3.98 4.864 5.072 5.286...
  • Page 59 13. SENSOR PARAMETER T [℃ ] Rmin [ KΩ ] Rnom [ KΩ ] Rmax [ KΩ ] DR(MIN)% DR(MAX)% 0.8570 0.9246 0.9971 -7.31 7.27 0.8316 0.8977 0.9687 -7.36 7.33 0.8071 0.8717 0.9412 -7.41 7.38 0.7834 0.8466 0.9146 -7.47 7.43 0.7604 0.8223 0.8888...

  • Page 60: Troubleshooting

    14.TROUBLESHOOTING 14. Troubleshooting 14.1 Trouble guide Troubleshooting for Normal Malfunction Troubleshooting Possible Reason of Abnormality How to Deal With 1. Check power supply circuit; 2. Measure insulation resistance to 1. Power supply failure; ground to see if there is any 2.
  • Page 61 14.TROUBLESHOOTING When the air conditioner failure occurs, the fault code will displays on control board. HOW TO CHECK FAULT CODES 1) 12K/14K/18K There are 4 LED lamps on control board, LED2,LED3,LED4 and LED7. LED2 and LED3 indicate outdoor main control fault ,LED 4 and LED7 indicate drive fault. Main control failure: Lamp LED2 display fault code ten digit number, LED3 display fault code single digit number.
  • Page 62 14.TROUBLESHOOTING 2) 21K/AMW3-24U4RFA Drive failure indicator V17: Ten digit number V18: Single digit number Main control failure indicator V15: Ten digit number V16: Single digit number Main Control Board Main control failure: a. Check by 7 segment display on maintenance board. b.
  • Page 63 14.TROUBLESHOOTING Drive failure: Check by lamp on main control board Lamp V17 display fault code ten digit number, V18 display fault code single digit number. The failure lamp flicking times shows the failure code. 3) AMW3-24U4RAA/27K/36K/42K Main control failure Fault code will display on segment display on outdoor control board.

  • Page 64: Fault Codes

    14.TROUBLESHOOTING 14.2 Fault codes The following is the fault code table of outdoor. Table 1 Outdoor Fault Code Fault Fault description Possible reasons for abnormality How to deal with Remarks code 1.Reconnect the outdoor 1.The outdoor ambient temperature ambient temperature sensor; Outdoor ambient sensor is connected loosely;...
  • Page 65 14.TROUBLESHOOTING Fault Fault Description Possible Reason of Abnormality How to Deal With Remarks Code 1. Three-phase power is 1. Normally protection abnormal; 2. Check the wiring connection 2. The outdoor wiring connects voltage absent phase refer to the wiring diagram; wrong;...
  • Page 66 14.TROUBLESHOOTING Fault Fault Description Possible Reason of Abnormality How to Deal With Remarks Code 1. The wiring of the sensor for the 1. Reconnect the wiring of the expansion valve A(thin tube) sensor for the expansion valve connect loose; A (thin tube); Expansion valve A 2.
  • Page 67 14.TROUBLESHOOTING Fault Possible Reason of Abnormality Fault Description How to Deal With Remarks Code 1.The cable between the control 1.Reconnect the cable between board and the driver board is the control board and the connected loosely; driver board; 2.The cable between the control 2.Replace the communication IPM and control board board and the driver board...
  • Page 68 14.TROUBLESHOOTING Fault Fault Description Possible Reason of Abnormality How to Deal With Remarks Code 1.The connecting wiring of the 4- 1. Reconnect the wiring of the way valve coil is loose; 4-way valve; 4-way valve 2.The 4-way valve coil fails; 2.
  • Page 69 14.TROUBLESHOOTING Table 3 Drive Fault code (12K/14K/18K/21K/AMW3-24U4RFA/42K) Fault Fault description Possible reasons for abnormality How to deal with code Inverter DC voltage overload fault 1. Power supply input is too high 1. Check the power supply Inverter DC low voltage fault or too low;...
  • Page 70 14. TROUBLESHOOTING Table 4 Drive Fault Code (AMW3-24U4RAA/27K/36K) Fault Fault description How to deal with Possible reasons for abnormality code 1. Check the compressor wire; 1. Compressor wire is not connected properly; 2. Change the driver board ; 2. Bad driver board components; Q axis current 3.
  • Page 71 14.TROUBLESHOOTING Fault Fault description How to deal with Possible reasons for abnormality code 1. Voltage input is too low; 1. Check the power supply; Low DC voltage 200V 2. Drive board fault. 2. Change the driver board; Driver board read EE 1.
  • Page 72 14.TROUBLESHOOTING Table 5 Limitation code Code Definitions Reasons When overcurrent occurs, stop the frequency Current control from increasing. When overcurrent occurs, reduce the frequency. Current control When the temperature of IPM module is too Frequency control to keep appropriate high, stop the frequency from increasing. temperature of IPM module.

  • Page 73: Checking Components

    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 ----- Tube defrost. FEEL ----- The difference between tube’s temperature. TEST ----- Test pressure.
  • Page 74 15.CHECKING COMPONENTS Test system flow Cooling mode Test system pressure. The pressure on the Is the low pressure high side. normal at service part ? Recharge refrigerant after air purging with If the pressure is The pressure on the the vacuum close to static low side.

  • Page 75: Check Parts Unit

    15. CHECKING COMPONENTS 15.2 Check parts unit 1. Fan motor DC motor 12K/14K Model: SIC-52FV-F130-3 Model: ZWA228D44B 21K~36K Model: SIC-71FW-D8121-1 Model: SIC-81FW-F1138-1 2. Compressor COMPRESSOR EXAMINE AND REPAIR Model: GSD113RKRA8JV6 Model: KTN150D42UFZ 21K/AMW3-24U4RFA Model: KTM240D57UMU AMW3-24U4RAA /27K/36K Model: KTF235D22UMT Model:KTF400D64UMT DC Inverter &...
  • Page 76 15. CHECKING COMPONENTS Test in resistance. TOOL: Multimeter. Test the resistance of the winding. The compressor is fault if the resistance of winding 0(short circuit)or∞（open circuit） Familiar error: Compressor motor lock. Discharge pressure value approaches static pressure value . Compressor motor winding abnormality. Notes ：...
  • Page 77 15. CHECKING COMPONENTS 6. Fuse Checking continuity of fuse on PCB ASS’Y. Remove the PCB ASS’Y from the electrical component box. Then pull out the fuse from the PCB ASS’Y (Fig.1) Fuse PCB Ass'Y Fig.1 2) Check for continuity by a multimeter as shown in Fig.2. Fuse Fig.2 7.Capacitor...

  • Page 78: Disassembly And Assembly For Compressor And Motor

    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 Hexagon Socket Outdoor unit 12K/14K/18K/21K/24K/27K/36K Important: Before disassembly and assembly, make sure that the power to the system has been disconnected and verified as voltage free.
  • Page 79 16. DISASSEMBLY AND ASSEMBLY FOR COMPRESSOR AND MOTOR 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 1. Remove external and valve cover;...
  • Page 80 Product improvement, specifications and appearance in this manual are subject to change without prior notice.

This manual is also suitable for:

Amw2-14u4rraAmw2-18u4rxaAmw3-21u4rfaAmw3-24u4rfaAmw3-24u4raaAmw4-27u4raa ... Show all

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