Pioneer YH024GHFI18RT2 Technical & Service Manual
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Pioneer YH024GHFI18RT2 Technical & Service Manual

Pioneer YH024GHFI18RT2 Technical & Service Manual

High efficiency condensing unit, r-410a refrigerant 208-230 v, 1 phase, 60 hz 18 seer
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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.
CENTRAL SPLIT AIR CONDITIONER
Technical &
Service Manual
v3.0

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Summary of Contents for Pioneer YH024GHFI18RT2

  • Page 1 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...
  • 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

    Table of Contents 1. General ..............................1 1.1 Features............................1 1.2 Product lineup..........................2 1.3 Nomenclature ..........................2 1.4 Unit installation ..........................3 1.5 Working range..........................3 1.6 Product appearance ........................4 2. Specifications............................5 3. Outlines and dimensions........................7 4. Electrical data .............................10 5. Capacities and selection data ......................11 5.1 Capacity characteristic charts .....................11 5.2 Piping length correction factor .....................17 5.3 Correction factors according to defrosting operation..............18...

  • Page 5: 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.

  • Page 6: Product Lineup

    1.2 Product lineup Model (Btu/h) Type ● ● ● Outdoor unit ● : available model 1.3 Nomenclature YH024GHFI18RT2 YH036GHFI18RT2 YH060GHFI18RT2...

  • Page 7: Unit Installation

    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...

  • Page 8: Product Appearance

    1. GENERAL 1.6 Product appearance Model Outdoor Unit (Btu/h)

  • Page 9: Specifications

    2. SPECIFICATIONS 2. Speci cations YH060GHFI18RT2 Outdoor Model YH024GHFI18RT2 YH036GHFI18RT2 208/230/1/60 Power Supply V/ph/Hz 208/230/1/60 208/230/1/60 Energy Star Capacity Btu/h 24000 56000 36000 18300 -59400 Capacity(MIN -MAX) Btu/h 6700-26000 11800-36800 6560 Input 2200 3730 26.8 Cooling Current 16.5 2.50 3.20 2.
  • Page 10 2. SPECIFICATIONS YH060GHFI18RT2 Outdoor Model YH024GHFI18RT2 YH036GHFI18RT2 4.05 70.5 0.376 0.376 Φ Φ 860 670 310 730 450 156.5 167.5 NOTE: 35.0 15.6 ： ，...

  • Page 11: Outlines And Dimensions

    3. OUTLINES AND DIMENSIONS 3. Outlines and dimensions Unit : in.(mm)
  • Page 12 3. OUTLINES AND DIMENSIONS Unit : in.(mm) 6-1/8 7-1/4(185) 22-7/8(580) (155) 3-1/2 2-5/8(66) 37-3/8(950) (88) 40-7/8（1038） 13-9/16(344) 2-3/4 4- φ 5/8 (15 ) (70)
  • Page 13 3. OUTLINES AND DIMENSIONS Unit : in.(mm)

  • Page 14: Electrical Data

    4. Electrical data Power supply Applicable voltage Outdoor Nominal unit Nominal Frequency Voltage(V) Umin (V) Umax (V) Sensitive (Hz) Current (A) Current (mA) 208/230 208/230 208/230 NOTE: 1. The above compressor data is based on 100% capacity combination of indoor units at the rated operating frequency.

  • Page 15: 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...
  • Page 16 Performance data (Cooling operation at rated frequency) 36K outdoor unit matches 30K indoor unit IWB (°F) Outdoor IDB (°F) 28.1 28.4 29.0 29.4 29.0 29.4 29.7 29.9 31.0 31.3 31.6 31.8 37.8 38.1 38.4 0.99 1.00 1.00 1.00 0.61 0.83 1.00 1.00 0.39 0.57 0.73 0.90 0.39 0.53 0.67 2.11 2.13 2.15 2.15 2.15 2.17 2.19 2.21 2.21 2.23 2.26 2.28 2.79 2.82 2.86...
  • Page 17 Performance data (Cooling operation at rated frequency) 36K outdoor unit matches 36K indoor unit IWB (°F) Outdoor IDB (°F) 30.8 31.1 31.7 32.1 31.7 32.1 32.4 32.8 33.9 34.2 34.5 34.7 41.3 41.6 42.0 0.99 1.00 1.00 1.00 0.61 0.83 1.00 1.00 0.39 0.57 0.73 0.90 0.39 0.53 0.67 2.16 2.19 2.20 2.20 2.20 2.23 2.24 2.27 2.27 2.29 2.31 2.34 2.86 2.89 2.93...
  • Page 18 Performance data (Cooling operation at rated frequency) 60K outdoor unit matches 42K indoor unit IWB (°F) Outdoor IDB (°F) 43.5 43.9 44.8 45.4 44.8 45.4 45.8 46.3 47.9 48.3 48.8 49.1 58.4 58.8 59.3 0.99 1.00 1.00 1.00 0.61 0.83 1.00 1.00 0.39 0.57 0.73 0.90 0.39 0.53 0.67 3.52 3.56 3.59 3.59 3.59 3.63 3.65 3.70 3.70 3.72 3.77 3.81 4.66 4.71 4.77...
  • Page 19 Performance data (Cooling operation at rated frequency) 60K outdoor unit matches 48K indoor unit IWB (°F) Outdoor IDB (°F) 43.9 44.3 45.2 45.8 45.2 45.8 46.3 46.7 48.4 48.8 49.3 49.6 59.0 59.4 59.9 0.99 1.00 1.00 1.00 0.61 0.83 1.00 1.00 0.39 0.57 0.73 0.90 0.39 0.53 0.67 3.55 3.59 3.61 3.61 3.61 3.66 3.68 3.73 3.73 3.75 3.80 3.84 4.70 4.74 4.81...
  • Page 20 Performance data (Cooling operation at rated frequency) 60K outdoor unit matches 60K indoor unit IWB (°F) Outdoor IDB (°F) 47.7 48.2 49.2 49.8 49.2 49.8 50.3 50.8 52.6 53.1 53.6 53.9 64.1 64.6 65.1 0.99 1.00 1.00 1.00 0.61 0.83 1.00 1.00 0.39 0.57 0.73 0.90 0.39 0.53 0.67 3.63 3.68 3.70 3.70 3.70 3.75 3.78 3.82 3.82 3.85 3.89 3.94 4.81 4.86 4.93...

  • Page 21: Piping Length Correction Factor

    5.2 Piping length correction factor Pipe length L Indoor unit Height difference H Outdoor unit Add. Max. Height Max. Pipe Refrigerant Model difference length (L) [exceed 25ft 7.6m] 0.38(oz/ft) 164ft. (50m) 98ft. (30m) [35(g/m)] 0.38(oz/ft) 246ft. (75m) 98ft. (30m) [35(g/m)] 0.60(oz/ft) 246ft.

  • Page 22: Correction Factors According To Defrosting Operation

    The correction factor of height between indoor unit and outdoor unit Height difference 16ft (5m) 33ft (10m) 108ft (30m) Factor 0.01 0.02 0.025 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 23: Sound Pressure Data

    6. Sound pressure data Outdoor unit Model Model 3.28ft(1.0m) ahead of the unit; 2.7ft (0.83) high 3.28ft. (1.0m) ahead of the unit; 3.28ft. Test condition Test condition from the bottom of the unit; 3.28ft (1.0m) high (1.0m) high from the bottom of the unit. from the ground.

  • Page 24: Refrigerant Cycle

    7. REFRIGERANT CYCLE 7. Refrigerant cycle Outdoor unit Cooling cycle Heating cycle List of components Compressor Electronic expansion valve Discharge temperature sensor Stop valve (Liquid) Stopv valve (Gas) 4-Way valve Outdoor heat exchanger One-way valve Coil temperature sensor Strainer Ambient temperature sensor Pressure sensor...
  • Page 25 7. REFRIGERANT CYCLE List of components Compressor Coil temperature sensor Defrost temperature sensor Discharge temperature sensor Electronic expansion valve High pressure switch Suction temperature sensor Strainer One-way valve 4-Way valve Pressure sensor Stopv valve (Gas) Stop valve (Liquid) Outdoor heat exchanger Ambient temperature sensor...
  • Page 26 7. REFRIGERANT CYCLE List of components Compressor Coil temperature sensor Defrost temperature sensor Discharge temperature sensor Electronic expansion valve High pressure switch Suction temperature sensor Strainer One-way valve 4-Way valve Pressure sensor Stopv valve (Gas) Stop valve (Liquid) Outdoor heat exchanger Low pressure switch Ambient temperature sensor...

  • Page 27: Wiring Diagram

    8. WIRING DIAGRAM 8. Wiring diagram 8.1 Electrical wiring diagram Outdoor unit Electric wiring diagram 2089691.B Main control b oard Remark: Dashed parts are not available in some models. For details, see the table below. Overheat Outdoor units model Four way valve Heating belt Heating YEL/GRN...
  • Page 28 8. WIRING DIAGRAM Electric wiring diagram 2022241.C POWER Main control b oard THERMOSTAT Driver b oard...
  • Page 29 8. WIRING DIAGRAM Electric wiring diagram 2097819.A Driver b oard Main control b oard Remark: Dashed parts are not available in some models. For details, see the table below. Outdoor units model Superheat protection switch ● --available part ●...

  • Page 30: Control Board Picture

    8. WIRING DIAGRAM 8.2 Control board picture Main control board 4 5 6 7 Description Description Compressor Heater DC fan Electric heating belt Coil temperature sensor AC Power Lin Ambient temperature sensor AC Power Nin Discharge temperature sensor Reactor L1 Overheat protector Reactor L2 Electronic expansion valve...
  • Page 31 8. WIRING DIAGRAM 7-Segment display board Description Description Switch to outdoor control board S1-Select button 7-Segment display DIP switch S3-Decrease button Program S2-Increase button Computer/Checker to outdoor control board...
  • Page 32 8. WIRING DIAGRAM Main control board Description Description Tube electric heater Pressure switch 4-way valve Compressor heating protector Electric heating belt L Sensor Signal Out Suc. Coil Def. Diss. Electric heating belt N Pressure sensor N Out to driver board Nin Computer socket AC Power Nin EE data socket...
  • Page 33 8. WIRING DIAGRAM Driver board Description Description Reactor L2 DC+ to electrolytic capacitor + Reactor L1 Compressor U Compressor V AC Power Lin Compressor W AC Power Nin EE data socket GND to electrolytic capacitor + DC+ to electrolytic capacitor + Power from main control board Communication signal from main control board...
  • Page 34 8. WIRING DIAGRAM Main control board Description Description DC Fan Driver1 Computer/Checker DC Fan Driver2 EEPROM IPM-SI PTC Control Signal Defrost /Coil Temperature Sensor Communication signal Pressure Sensor Electric Heating Belt Discharge Temperature Sensor Electric Heating Belt Ambient Temperature Sensor 4-Way Valve High Pressure Switch Base heater...
  • Page 35 8. WIRING DIAGRAM Driver board Description Description DC Fan Signal Compressor W Compressor U IPM-SI Compressor V EEPROM DC FAN1 DC FAN2 DC Fan Signal Reactor L1 Reactor L2...
  • Page 36 8. WIRING DIAGRAM Filter board Description Description N Out PTC Control Signal L Out...

  • Page 37: Common Wiring

    8. WIRING DIAGRAM 8.3 Common wiring Recommended wire size Model Power Source Transmitting Power Supply (Capacity) Cable Size Cable Size Rated Current Nominal Sensitive Current (mA) 208/230V ~/60Hz 3×12AWG 4×16AWG 208/230V ~/60Hz 3×10AWG 4×16AWG 208/230V ~/60Hz 3×8AWG 4×16AWG Running Current REFER TO NAMEPLATE NOTE: ●...

  • Page 38: Field Setting

    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. Setting method Setting method 36K/60K...
  • Page 39 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 →...

  • Page 40: Running Parameter Query

    9. FIELD SETTING 9.2 Running parameter query Query by 7 segment display 7 segment display Digital display switch 7-segment display Introduction ● ● ● Decrease Select Increase There are 3 buttons on the digital display board： 1) Select button: Select to display outdoor/indoor unit parameter. "P."...
  • Page 41 9. FIELD SETTING Parameters can be checked in the following table below. Parameter Descriptions code Fault codes Compressor actual frequency Compressor driving frequency Compressor target frequency Compressor exhaust temperature Outdoor suction Temperature Outdoor ambient temperature Outdoor coil temperature Outdoor defrosting temperature P.10 IPM module temperature P.11...
  • Page 42 9. FIELD SETTING 36K/60K ● ● ● ● ● ● Decrease Decrease Select Increase Select Increase 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.”-outdoor unit parameter 2) INCREASE button: Each time it is pressed, the number rises by 1, hold down it, the number will be rapidly increased;...

  • Page 43: Piping Work And Refrigerant Charge

    10. PIPING WORK AND REFRIGERANT CHARGE 10. Piping work and refrigerant charge 10.1 MAX.length allowed Pipe length L Indoor unit Height difference H Outdoor unit Add. Max. Height Max. Pipe Refrigerant Model difference length (L) [exceed 25ft 7.6m] 0.38(oz/ft) 164ft. (50m) 98ft.

  • Page 44: 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 45: 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 46: 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...

  • Page 47: Control Mode

    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.

  • Page 48: 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%) 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 -7.78...
  • Page 49 13. SENSOR PARAMETER Rmin [ KΩ ] Rnom [ KΩ ] Rmax [ KΩ ] DR(MIN)% DR(MAX)% T [℃ ] 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 50 13. SENSOR PARAMETER Rmin [ KΩ ] Rnom [ KΩ ] Rmax [ KΩ ] DR(MIN)% DR(MAX)% T [℃ ] 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 51 13. SENSOR PARAMETER 2. THE PARAMETER OF THE OTHER SENSOR: =15K±2%;B0/100=3450K±2%) Rmin [ KΩ ] Rnom [ KΩ ] Rmax [ KΩ ] DR(MIN)% DR(MAX)% T [℃ ] 60.78 64.77 68.99 -6.16 6.12 57.75 61.36 65.16 -5.88 5.83 54.89 58.15 61.58 -5.61 5.57...
  • Page 52 13. SENSOR PARAMETER Rmin [ KΩ ] Rnom [ KΩ ] Rmax [ KΩ ] DR(MIN)% DR(MAX)% T [℃ ] 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 53 13. SENSOR PARAMETER Rmin [ KΩ ] Rnom [ KΩ ] Rmax [ KΩ ] DR(MIN)% DR(MAX)% T [℃ ] 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 54: Troubleshooting

    14.TROUBLESHOOTING 14. Troubleshooting 14.1 Trouble guide Troubleshooting for normal malfunction Troubleshooting Possible Reasons 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 55 17.TROUBLESHOOTING Outdoor unit 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.
  • Page 56 14.TROUBLESHOOTING 36K/60K Main control fault display Fault code will be displayed by 7 segment display on main control board. Display ERROR code. : Show failure occur. 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. LED1:Drive failure indicator...

  • Page 57: Fault Codes

    14.TROUBLESHOOTING 14.2 Fault codes The following is the fault code table of outdoor units. 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 58 14.TROUBLESHOOTING Fault Fault description Possible reasons for abnormality How to deal with Remarks code 1. Reconnect the wiring of the 1. The wiring of the overload overload protector; protector is connected loosely. 2. Replace the overload 2. The overload protector fails . protector;...
  • Page 59 14.TROUBLESHOOTING Fault Fault description Possible reasons for abnormality How to deal with Remarks code There are many reasons for this failure. You can check the driver board fault LED to further analyze See attached "analysis of the the fault code of the drive board and IPM fault driving board fault".
  • Page 60 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...
  • Page 61 17.TROUBLESHOOTING Table 2 Drive fault code (24K) Fault Fault description How to deal with Possible reasons for abnormality code Inverter DC voltage overload fault 1. Power supply input is too high 1. Check power supply； Inverter DC low voltage fault or too low;...
  • Page 62 14. TROUBLESHOOTING Table 3 Drive fault code (36K/60K) Fault Fault description How to deal with Possible reasons for abnormality code 1. Check the wire of the compressor; 1. Compressor wire is not connected properly; 2. Change the driver board ; 2.
  • Page 63 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 64: 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 See ----- Tube defrost. Feel ----- The difference between the temperature of tubes.
  • Page 65 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 66: Check Parts Unit

    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 DC Inverter Power & Controller Compressor Test in resistance. TOOL: Multi-meter.
  • Page 67 15. CHECKING COMPONENTS NOTES： Don’t put a compressor on its side or turn over. Please assemble the compressor in your air conditioner rapidly after removing the plugs. Don’t place the comp. in air for a long time. Avoid compressor running in reverse caused by connecting electrical wire incorrectly. Warning! In case AC voltage is impressed to compressor, the compressor performance will decrease because of its rotor magnetic force decreasing.

  • Page 68: 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 Important: Before disassembly and assembly, make sure that the power to the system has been disconnected and verified as voltage free.
  • Page 69 16. DISASSEMBLY AND ASSEMBLY FOR COMPRESSOR AND MOTOR Outdoor unit 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;...
  • Page 70 16. DISASSEMBLY AND ASSEMBLY FOR COMPRESSOR AND MOTOR Outdoor unit 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.

  • Page 71: Control Logic Description

    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.
  • Page 72 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;...
  • Page 73 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.
  • Page 74 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.
  • Page 76 Product improvement, specifications and appearance in this manual are subject to change without prior notice.

This manual is also suitable for:

Yh036ghfi18rt2Yh060ghfi18rt2

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