GE AUH2436ZGDA Service Manual
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GE AUH2436ZGDA Service Manual

GE AUH2436ZGDA Service Manual

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Contact GE Appliances at:
Homeowner: GEAppliances.com
HVAC Pro: GEAppliancesairandwater.com
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866.814.3633
Split System USAC and USHP matches:
AHRIDirectory.org
AUH2436ZGDA, AUH4860ZGDA
UUY24ZGDAB, UUY36ZGDAB
UUY48ZGDAB, UUY60ZGDAB
KEEP THESE INSTRUCTIONS
READ CAREFULLY.
31-5001066 Rev. 0 02-25
.

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Summary of Contents for GE AUH2436ZGDA

  • Page 1 Service AUH2436ZGDA, AUH4860ZGDA UUY24ZGDAB, UUY36ZGDAB Manual UUY48ZGDAB, UUY60ZGDAB Contact GE Appliances at: Homeowner: GEAppliances.com HVAC Pro: GEAppliancesairandwater.com 866.814.3633 READ CAREFULLY. Split System USAC and USHP matches: KEEP THESE INSTRUCTIONS AHRIDirectory.org 31-5001066 Rev. 0 02-25...

  • Page 2: Table Of Contents

    Safety Notifications Thank you for choosing GE Appliances Connect Series heat pumps.. Please read this manual carefully in order to properly install the equipment and maximize customer satisfaction. Contents ................................2 Introduction ..................................3 Lists of Units ......................................3 .......................................4 Controls ....................................6 Operation Modes ....................................6...

  • Page 3: Safety Notifications

    Safety Notifications PROHIBITED • • • operating gas appliance or an operating electric heater). • • • • • WARNING • • • • Please test the system for leaks prior to charging. Leaks discovered after the unit start up require refrigerant pump- •...

  • Page 4: Operation Safety

    Operation Safety PROHIBITED • • Replace all wires that have worn or damaged insulation. • This equipment must have a dedicated electrical circuit and service disconnect switch. WARNING • Maintain a regular schedule for presentative maintenance. NOTICE • Do not remove the fan cover while the unit is running. •...

  • Page 5: Introduction

    Introductions List of Units Outdoor Units Power Supply Circuit Breaker Capacity Model Appearance V/Ph/Hz AUH2436ZGDA 208/230V-1Ph-60Hz AUH4860ZGDA 208/230V-1Ph-60Hz Indoor Units Circuit Breaker Power Supply Fuse Capacity Cooling/Heating Capacity Model Appearance Capacity (Btu/h) V/Ph/Hz UUY24ZGDAA 24000/24000 208/230V-1Ph-60Hz UUY36ZGDAA 36000/36000 208/230V-1Ph-60Hz UUY48ZGDAA...
  • Page 6 Introductions Outdoor Unit AUH2436ZGDA AUH4860ZGDA 0-84691-85495-1 0-84691-85469-2 Capacity Selection Indoor Unit UUY24ZGDAA UUY36ZGDAA UUY48ZGDAA UUY60ZGDAA 0-84691-85716-7 0-84691-85717-4 0-84691-85718-1 0-84691-85719-8 Cooling Capacity Btu/hr. SEER Cooling 12.5 10.5 Cooling Operating Range 5~129°F (-15~54°C) 5~129°F (-15~54°C) Heating Capacity Btu/hr. HSPF 10.5 10.5 Heating Heating Operating Range -22~75°F (-30-24°C)
  • Page 7 Introductions Outdoor Unit AUH2436ZGDA AUH4860ZGDA 0-84691-85465-4 0-84691-85469-2 Capacity Selection Indoor Unit UUY24ZGDAB UUY36ZGDAB UUY48ZGDAB UUY60ZGDAB 0-84691-86343-4 0-84691-86344-1 0-84691-86345-8 0-84691-86346-5 Cooling Cooling Capacity Btu/hr. 24,000 34,000 48,000 54,000 SEER2 15.8 EER2 Cooling Operating Range 5~129°F (-15~54°C) 5~129°F (-15~54°C) Heating Heating Capacity Btu/hr.

  • Page 8: Controls

    Controls Operation Modes Cooling Mode Power On Cooling start control Indoor fan run Satisfying open Compressor stop Compressor for 3 minutes condition Compressor Meet the temperature Compressor and outdoor point shutdown and outdoor fan run condition fan stop Meet the oil return condition Meet the oil return Oil return separation...

  • Page 9: Heating Mode

    Controls Operation Modes Heating Mode Power On Heating start control Indoor fan run Satisfying open Compressor stop Compressor for 3 minutes condition Compressor Meet the temperature Compressor and outdoor point shutdown and outdoor fan run condition fan stop Meet the oil return condition Meet the defrost end...

  • Page 10: Control Modes

    Controls Control Modes Based Control Compressor Control to a time delay. EXV Control Outdoor Fan Control • This series heat pump has two types of outdoor units: one with a single fan and the other with dual fans. The outdoor cooling at low temperature and heating at high temperature.

  • Page 11: Functions

    The system will shut down and display error code E4 during high temperature to the unit. Functions Capacity Selection Capacity Defrost Operating Mode Outdoor DIP SA2-1 AUH2436ZGDA AUH4860ZGDA indicates switch position Set Defrost Mode temperature environments. Strong Defrost is recommended in humid climates Outdoor DIP SA2-2 Standard Defrost (default) Strong Defrost indicates switch position 31-5001066 Rev.
  • Page 12 Controls Set Operating Mode shows the 36K outdoor unit. Standard Mode is the default mode. These are used under very Outdoor DIP SA2-3/SA2-4 specific conditions. Please Standard Mode (default) Strong Mode Energy Saving Mode adjusting. indicates switch position Set Indoor Fan Speed the indoor unit fan.
  • Page 13 Controls Set Indoor Fan Speed (cont) UUY24ZGDAB UUY36ZGDAB UUY48ZGDAB UUY60ZGDAB HEAT (Indoor DIP SA2) COOL (Indoor DIP SA1) HEAT (Indoor DIP SA2) COOL (Indoor DIP SA1) Level 1 Level 2 (default) Level 3 Level 4 Level 5 Level 6 Level 7 Level 8 Indicates switch position 31-5001066 Rev.

  • Page 14: Blower Performance Tables

    Controls Blower Performance Tables Static Pressure: Model 0.15 Inches W.C. Speed 1-CFM (L) 1050 UUY24ZGDAA Speed 2-CFM (M) 1200 1070 1010 Speed 3-CFM (H) 1280 1180 1130 1080 Speed 1-CFM (L) 1230 1100 1000 UUY36ZGDAA Speed 2-CFM (M) 1315 1230 1190 1145 1050...
  • Page 15 Controls Forced Defrost Control • Press and hold the SW1 SW2 or SW3 to change the selection SW1 to save. The menu will time out if no function is performed within 10 seconds. Refrigerant Recovery Control • Press and hold the SW1 SW2 or SW3 to change the selection within 10 seconds.

  • Page 16: Troubleshooting

    Troubleshooting Wiring Diagrams The following electric diagram is for reference only. Please refer to diagram attached to the unit as the latest version. Outdoor Units Model: AUH2436ZGDA 31-5001066 Rev. 0...
  • Page 17 Troubleshooting Wiring Diagrams Model: AUH4860ZGDA 31-5001066 Rev. 0...
  • Page 18 Troubleshooting Wiring Diagrams The following electric diagram is for reference only. Please refer to diagram attached to the unit as the latest version. Indoor Units Model: UUY24ZGDAA, UUY36ZGDAA Model: UUY48ZGDAA, UUY60ZGDAA 31-5001066 Rev. 0...
  • Page 19 Troubleshooting Wiring Diagrams Model: UUY24ZGDAB, UUY36ZGDAB UUY48ZGDAB, UUY60ZGDAB HEAT HEAT POWER CB 1 CB 1 CB 1 CB 2 CB 2 CB 1 W 14 W 15 1 2 3 4 5 6 15KW HEAT KIT 20KW HEAT KIT ② 5KW HEAT KIT 8KW HEAT KIT 10KW HEAT KIT...

  • Page 20: Pcb Layout

    Troubleshooting PCB Layout Interface Indoor Unit: Main Board Printing Interface Printing Interface AC-N (X2) Neutral wire input X9 (G_SCAN) Indoor motor check AC-L (X1) Live wire input X14 (OFAN-H-OUT) AC motor high speed output Wired control communication X11 (OFAN-H-IN) AC motor high speed input interface DC motor output X8 (OFAN-L-IN)

  • Page 21: Motor Board

    Troubleshooting Motor Board Printing Interface Printing Interface DC-MOTOR1 DC motor output COM2 DC motor control signal input 31-5001066 Rev. 0...

  • Page 22: Indoor Unit

    Troubleshooting Indoor Unit Models: UUY24ZGDAB, UUY36ZGDAB, UUY48ZGDAB, UUY60ZGDAB Main Board Printing Interface Printing Interface 1. Electrical heat check AC-N (X2) Neutral wire input 3. Defrosting check AC-L (X1) Live wire input X9 (G_SCAN) Indoor motor check Wired control communication X10 (O_SCAN) 4-Way check interface TUBE...

  • Page 23: Outdoor Unit

    Troubleshooting Outdoor Unit: Model: AUH2436ZGDA, AUH4860ZGDA Main Board Printing Interface Printing Interface AC-L Live wire input H-PRESS High pressure sensor interface AC-N Neutral wire input System low pressure protection interface HEAT_TIE_B System high pressure protection interface HEAT_TIE_C T_SENSOR2 6. Discharge temperature sensor interface...

  • Page 24: Drive Board

    Troubleshooting Drive Board Model: AUH2436ZGDA Printing Interface Printing Interface L2-2 P-OUT Reserved AC-L Live wire L1-2 PFC induction wire (white) L1-1 L2-1 PFC induction wire (yellow) Neutral wire G-OUT Reserved COMM1 Compressor U phase terminal COMM COMM Compressor V phase terminal...
  • Page 25 Troubleshooting Model: AUH4860ZGDA Printing Interface Printing Interface L2-2 L1-2 PFC induction wire (white) AC-L Live wire Compressor U phase terminal L1-1 Compressor V phase terminal Neutral wire Compressor W phase terminal JTAG1 Programming interface (for testing) Drive power supply terminal COMM DC-BUS Power discharge terminal (for testing)
  • Page 26 Troubleshooting Filtering Board Model: AUH2436ZGDA Printing Interface Printing Interface AC-L Power input live wire terminal N-OUT Power output neutral wire terminal (reserved) AC-N Power input neutral wire terminal N-OUT Power output neutral wire terminal L-OUT Power output live wire terminal...

  • Page 27: Ipm, Pfc Testing Method

    Troubleshooting IPM, PFC Testing Method Method of Testing IPM Module • W wires from the compressor. Testing Steps Method of Testing PFC Module Short Circuit • and L2-1. Testing Steps: L1-2 and N and L2-1. module. AUH2436ZGDAA 31-5001066 Rev. 0...
  • Page 28 Troubleshooting AUH4860ZGDAA 31-5001066 Rev. 0...

  • Page 29: Indoor Unit Led Indicators

    Troubleshooting Indoor Unit LED Indicators (UUY(--)ZGDAB Only) malfunction information of the unit. LED indicator Color Function Power Indicator Running Indicator Green Malfunction Running Indicator Status Remark Indoor Jumper Cap failure Indoor Fan failure Flash means light on 0.5S then light out 0.5S Sensor failure Outdoor Unit Error Codes will display an error code identifying a malfunction of the unit if present.

  • Page 30: Troubleshooting

    Troubleshooting Troubleshooting Start Pressure Protection E1 protection Error display: Check if the system high pressure is Error judgment condition and higher than 667psi method: It is judged through the action of high pressure switch. If the it is judged that high pressure is too high and the system stops Check if the liquid Check if the wiring of...
  • Page 31 Troubleshooting Start E3 protection Refrigerant Undercharge Recovery Mode Check if the system low pressure is Error display: lower than 7psi Error judgment condition and method: It is judged through the action of Check if the liquid Charge refrigerant according low pressure switch. If the low valve and gas valve to the requirement and then of outdoor unit open...
  • Page 32 Troubleshooting Start High-Temperature Protection E4 Compressor Error display: air discharge high temperature protection Error judgment condition and method: Test the compressor discharge temperature through compressor discharge pipe and outdoor unit protection compressor shell top temperature sensor. If module and compressor the tested temperature value is higher than Possible causes: Restart the unit and check if the discharge...
  • Page 33 Troubleshooting Start Error display: Malfunction of outdoor coil temperature sensor Error judgment condition and method: Check if the condenser Sample the AD value of temperature sensor through temperature sensor on main temperature sensor detecting circuit and judge the range of AD correctly Possible causes: •...
  • Page 34 Troubleshooting Start Error display: Malfunction of discharge temperature sensor Error judgment condition and method: Check if the discharge Sample the AD value of temperature sensor through temperature sensor on main temperature sensor detecting circuit and judge the range of AD correctly Possible causes: •...
  • Page 35 Troubleshooting Start Malfunction of ODU memory chip Error display: error Error judgment condition and method: Possible causes: • • Memory chip is weakly soldered. • Memory chip lead is short-circuited. Start H4 Overload Error display: Error judgment condition and method: system will report overload protection.
  • Page 36 Troubleshooting Start Error display: H5 IPM protection Error judgment condition and method: Compressor 3-phase wire connection is phase reversed or has open phase. Drive processor supply voltage is low. IPM module malfunction. System will shut down. Possible causes: • Compressor 3-phase wire connection has open phase or is Connect wires System is heavy loaded? Compressor phase-reversed.
  • Page 37 Troubleshooting Start Error display: H7 Compressor out-of-step protection Compressor 3-phase wire connection is lack Error judgment condition and method: of phase or phased-reversing? The processor cannot detect the compressor rotor position. case will stop compressor operation. Possible causes: Connect wires Compressor phase wire •...
  • Page 38 Troubleshooting Start Error display: LC Startup failure Error judgment condition and method: Check the error code on 7 segment LED display of ODU main Short of refrigerant? Short Possible causes: Eliminate of compressor oil? system failure • • Compressor is faulty •...
  • Page 39 Troubleshooting Start PS Compressor over-current protection Error display: Compressor is running at high frequency and high load. The peak currant has reached the Error judgment condition and method: protection value? If compressor’s instant current value is higher than the set current occurs and system will shut down for protection.
  • Page 40 Troubleshooting Start Error display: Error display: P7 Driver module sensor error Error judgment condition and method: Error judgment condition and method: If IPM or PFC module temperature is lower than the set If IPM or PFC module temperature is lower than the set sensor error occurs and system will shut down for protection.
  • Page 41 Troubleshooting Start Error display: PA AC current protection Error judgment condition and method: Grid voltage is normal or not ? will shut down for protection. Possible causes: Compressor is running at Normal high frequency and high protection • System is heavy-loaded and compressor current is too large. load? •...
  • Page 42 Troubleshooting Start Error display: PH Bus low-voltage protection Error judgment condition and method: Grid voltage is normal or not? shut down for protection. Replace the Normal Possible causes: protection • • Start Error display: PU Charge loop error Error judgment condition and method: Grid voltage is too low? judged that charge loop error exists.
  • Page 43 Troubleshooting Start High pressure sensor error Error display: Error judgment condition and method: Check if the high pressure sensor on Sample the AD value of pressure sensor through pressure correctly sampling AD value exceeds upper limit and lower limit in 30 Possible causes: •...

  • Page 44: Failures Not Caused By Errors

    Troubleshooting Failures Not Caused by Errors Cause Corrective measure Please wait for time delay protection. time-delay. Wire connection is wrong. Connect wires according to the wiring diagram. The heat pump doesn’t Power failure. Restart after power is resumed. Power plug is loose. Re-insert the power plug.

  • Page 45: Maintenance

    Maintenance System Diagram System Evacuation • NOTICE • • 3. Connect the hose used for evacuation to the vacuum pump. Model Time(min) AUH2436ZGDA AUH4860ZGDA 31-5001066 Rev. 0...

  • Page 46: Refrigerant Charging

    Maintenance • NOTICE speed up the evacuation. • free nitrogen purging to ensure safety. This process may need to repeat several times. Do not use compressed air or oxygen in this process. Refrigerant Charging Pre-Charging 1. Connect the high pressure gauge line to the liquid service valve and connect the low pressure gauge line to the vapor line valve.

  • Page 47: Maintenance Of Major Components

    Maintenance 5. Open the high pressure gauge valve (Keep the low pressure gauge valve closed). Then charge refrigerant into the system. 7. If you can’t continue to charge refrigerant into the system and the quantity of charged refrigerant is less than the while the system is running.
  • Page 48 Maintenance How to Replace the Compressor Diagnosis of Compressor Failure: On Condition that the Unit CAN be Started Up 1. Start the unit if it will run and check the current of the faulted compressor. Use manifold gauges to measure the Inverter compressor QXFT-F310zN450 3.
  • Page 49 Maintenance Labels on the 4-way valve: C-connect to the outdoor coil. pressure and low temperature. pressure and high temperature regardless of the operating mode. the 4-way valve will produce some noise. Do not touch the pipes Diagnosis of Compressor Failure: On Condition that the Unit CANNOT be Started Up compressor.

  • Page 50: Replacement Of Compressor

    Maintenance Replacement of Compressor 1. Preparation A. Prepare the components for replacement: • inside the compressor doesn’t pour out from the oil refrigerant ports. The suction and discharge openings of the compressor is in good condition. of the suction and discharge openings of the compressor are in good condition.
  • Page 51 Maintenance 5. Detach the compressor • • • please refer to the section: Removal of Major Components. • How to check oil quality: • A. • B. • Notes: • The axial direction of the compressor should not slant at an angle larger than 20° to the horizontal plane. •...
  • Page 52 Maintenance 8. Replace the compressor • 9. Check/Replace the gas-liquid separator • • 10. Check the system for leaks • • nitrogen simultaneously from the high pressure side and low pressure side. We recommend charging the nitrogen from • service valves and maintain the pressure of indoor and outdoor units for more than 12h. If the pressure remains 11.
  • Page 53 Maintenance How to Replace the Compressor Drive Module in the picture. 31-5001066 Rev. 0...

  • Page 54: Removal Of Major Components

    Maintenance Removal of Major Components Removal of ODU Major Components Picture Name Function Compressor pressure and high temperature refrigerant. It is the power drive of the system. 4-way valve cooling. Motor It is used to provide smooth currents of air for forced convection and heat exchange of condenser and evaporator.
  • Page 55 Maintenance Removal of Major Components (cont) Removal of ODU Major Components (cont) Picture Name Function Accumulator Flash refrigerant from liquid to gas Outdoor coil exchanging device. Electronic expansion valve Solenoid Electromagnetic valve controls increased enthalpy switch. Valve 31-5001066 Rev. 0...

  • Page 56: Front Panel Removal

    Maintenance Model: AUH2436ZGDA Front Panel Removal Step Picture Work instruction Unscrew the screws of the upper cover plate 1. Remove the upper cover plate. with a screwdriver. Unscrew the screws of the upper and front 2. Remove the front side plate.
  • Page 57 Maintenance Model: AUH2436ZGDA Front Panel Removal Step Picture Work instruction Unscrew the screws that connect the right 5. Remove the right side plate. around the right side plate. Screw up the screws around the right side 6. Install the right side plate plate.
  • Page 58 Maintenance Model: AUH2436ZGDA Front Panel Removal Step Picture Work instruction 9. Install the front side plate. tighten up the screws. Tighten up the screws around the upper 10. Install the upper cover plate. cover plate. 31-5001066 Rev. 0...
  • Page 59 Maintenance Model: AUH2436ZGDA Compressor/Gas Liquid Separator Removal Step Picture Work instruction Loosen the securing screws of the wires with a screwdriver. Remove the wires. 1. Remove wires. Note: the wire terminals corresponding to their color so as to avoid misconnection.
  • Page 60 Maintenance Model: AUH2436ZGDA Compressor/Gas Liquid Separator Removal Step Picture Work instruction After replacing the compressor/gas liquid 5. Install the new compressor/gas liquid separator onto the chassis. nuts. Braze the connection pipes of compressor to connect them to the compressor. compressor/gas liquid separator Note: to the pipeline.
  • Page 61 Maintenance Model: AUH2436ZGDA 4-Way Valve Removal Step Picture Work instruction 1. Remove the solenoid coil from Carefully unscrew the screws of electromagnetic the 4-way valve coil with a screwdriver. Use a torch to loosen the 4 joints on the 4-way valve and then remove the connection pipes.
  • Page 62 Maintenance Model: AUH2436ZGDA Fan and Motor Removal Step Picture Work instruction Use a screwdriver to unscrew the two 1. Remove the grill. screws on the upper left and lower right corners. Use a wrench to remove the specialized nut and gasket of the fan.
  • Page 63 Maintenance Model: AUH2436ZGDA Fan and Motor Removal Step Picture Work instruction Install the fan in place. Put on the gasket and use a wrench to secure the screw nut. 5. Install the fan. please check for the reason. 6. Install the grill.
  • Page 64 Maintenance Outdoor Coil Removal Step Picture Work instruction The connection wires inside and outside 3. Remove motor support. careful to protect the components. the pipes separate. Note: 4. Remove the outdoor coil. Loosen the securing screws of coil 5. Remove the outdoor coil exchanger and the support as a whole.
  • Page 65 Maintenance Model: AUH2436ZGDA Outdoor Coil Removal Step Picture Work instruction Secure the screws of coil and support. positions of entering and leaving pipes. Braze the connection pipes. 6. Install the new outdoor coil. Nitrogen welding: the pressure of Note: arrange the wires according Arrange and secure the wires as to the requirement.
  • Page 66 Maintenance Model: AUH2436ZGDA Electronic Expansion Valve Removal Step Picture Work instruction The connection wires inside and outside to protect the components. electronic expansion valve and the pipe. valve. Loosen the connection pipe of electronic 3. Remove the electronic expansion valve.
  • Page 67 Maintenance Model: AUH2436ZGDA Electronic Expansion Valve Removal Step Picture Work instruction 4. Take out the electronic Take out the electronic expansion valve. expansion valve. Braze the connection pipe of electronic expansion valve. wet cloth. 5. Install the new electronic expansion valve.
  • Page 68 Maintenance Model: AUH2436ZGDA Electronic Expansion Valve Removal Step Picture Work instruction Check whether each component and connection wire is well connected. 7. Check and open the upper and front panels. and right panels. Tighten up the screws. Model: AUH4860ZGDA Front Panel Removal...
  • Page 69 Maintenance Front Panel Removal Step Picture Work instruction Unscrew the screws of the front grill with a 3. Remove the front grill. screwdriver. Unscrew the screws that connect the front 4. Remove the front panel. around the front panel. 5. Install the front panel. screw on the lower right side.
  • Page 70 Maintenance Front Panel Removal Step Picture Work instruction Unscrew the screws of the valve cover with a 7. Remove the valve cover screwdriver. Unscrew the screws that connect the right side 8. Remove the right side plate. the right side plate. Screw up the screws around the right side 9.

  • Page 71: Compressor Disassembly

    Maintenance Front Panel Removal Step Picture Work instruction Tighten up the screws around the upper cover 11. Install the upper cover plate. plate. Model: AUH4860ZGDA Compressor Disassembly Step Picture Work instruction Loosen the securing screws of the wires with a screwdriver. Remove the wires.
  • Page 72 Maintenance Model: AUH4860ZGDA Compressor Disassembly Step Picture Work instruction Braze the pipes that are connected to the compressor. Then remove the pipes. to the compressor. Take out the compressor and replace it. 4. Remove the compressor from the chassis components. onto the chassis.
  • Page 73 Maintenance Model: AUH4860ZGDA Compressor Disassembly Step Picture Work instruction Braze the compressor connection pipes and connect them to the compressor. 6. Connect the pipes to the Note: suction and discharge ports. components. Connect the compressor wires to the wire terminals on the top of compressor. 7.
  • Page 74 Maintenance Model: AUH4860ZGDA 4-Way Valve Removal Step Picture Work instruction 1. Remove the solenoid coil Carefully unscrew the screws of from the 4-way valve electromagnetic coil with a screwdriver. Use a torch to loosen the 4 joints on the 4-way valve and then remove the connection pipes.
  • Page 75 Maintenance Model: AUH4860ZGDA 4-Way Valve Removal Step Picture Work instruction 4. Install the coil of 4-way Tighten the screws of the coil of 4-way valve valve. with a screwdriver. Model: AUH4860ZGDA Fan and Motor Removal Step Picture Work instruction Use a screwdriver to unscrew the two 1.
  • Page 76 Maintenance Model: AUH4860ZGDA Fan and Motor Removal Step Picture Work instruction Use a wrench to remove the specialized nut and gasket of the fan. 2. Remove the fan. Note: Please keep the nut and gasket safe after removing them from the fan. motor.
  • Page 77 Maintenance Model: AUH4860ZGDA Fan and Motor Removal Step Picture Work instruction Install the fan in place. Put on the gasket and use a wrench to secure the screw nut. 5. Install the fan. Note: 6. Install the grill. that secures the motor. Arrange the wires according to the wiring diagram.
  • Page 78 Maintenance Model: AUH4860ZGDA Compressor/Gas Liquid Separator Removal Step Picture Work instruction panels. 1. Loosen the wire clamp at the The connection wires inside and outside careful to protect the components. Remove the compressor/gas liquid separator and replace with a new one. 3.
  • Page 79 Maintenance Model: AUH4860ZGDA Compressor/Gas Liquid Separator Removal Step Picture Work instruction referring to the positions of entering and leaving pipes. Braze the two joints Nitrogen welding: the pressure of 4. Install the new gas liquid separator Note: Tighten the screws of gas liquid separator.
  • Page 80 Maintenance Model: AUH4860ZGDA Electronic Expansion Valve Removal Step Picture Work instruction 1. Loosen the wire clamp at the The connection wires inside and outside to protect the components. valve. Loosen the connection pipe of electronic Welding 3. Remove the electronic interface expansion valve using a torch.
  • Page 81 Maintenance Model: AUH4860ZGDA Electronic Expansion Valve Removal Step Picture Work instruction 4. Take out the electronic Take out the electronic expansion valve. expansion valve. Braze the connection pipe of electronic expansion valve. wet cloth. Welding 5. Install the new electronic interface Nitrogen welding: the pressure of nitrogen expansion valve.

  • Page 82: Removal Of Idu Major Components

    Maintenance Model: AUH4860ZGDA Electronic Expansion Valve Removal Step Picture Work instruction Check whether each component and connection wire is well connected. 7. Check and open the upper and side panels. and right panels. Tighten up the screws. Removal of IDU Major Components Air handler Unit Electric Box Disassembly and Assembly Step...
  • Page 83 Maintenance Air handler Unit Electric Box Disassembly and Assembly Step Picture Work instruction Disconnect the electric element from the wiring terminal. 3. Remove the electric Loosen screws around the electric element. element with a screwdriver. Remove the electric element from the Place the electric element at the proper position.
  • Page 84 Maintenance Air handler Unit Fan Motor Disassembly and Assembly Step Picture Work instruction Loosen screws round the upper panel with a screwdriver. 1. Remove the upper panel. Remove the upper panel from unit. Disconnect the wires of the fan from the wiring terminal and draw them out.
  • Page 85 Maintenance Air handler Unit Indoor Coil And Drain Pan Disassembly and Assembly Step Picture Work instruction Loosen screws round the upper panel with a screwdriver. 1. Remove the upper panel. Remove the upper panel from unit Loosen screws round the lower panel with 2.
  • Page 86 Maintenance Air handler Unit Indoor Coil And Drain Pan Disassembly and Assembly Step Picture Work instruction 5. Remove the primary Remove the primary drain pan from the drain pan. unit. 6. Remove the secondary Remove the secondary drain pan from the drain pan.

  • Page 87: Filter Disassembly And Assembly

    Maintenance Air handler Unit Filter Disassembly and Assembly Step Picture Work instruction 1. Remove the mounting plate Remove the mounting plate away from the unit 31-5001066 Rev. 0...

  • Page 88: Exploded View And Parts Lists

    Maintenance Exploded View and Parts Lists ODU Exploded View and Parts Lists AUH2436ZGDA 27 28 29 30 31 32 33 34 35 36 37 38 39 31-5001066 Rev. 0...
  • Page 89 Maintenance ODU Exploded View and Parts Lists AUH2436ZGDA Material name Material name Coping Accumulator PFC Inductance 4 Way Valve Coil Filter Board Drainage Hole Cap Temperature Sensor Power Switch Temperature Sensor Main Board Electrical Heater(Compressor) Inductance Electrical Heater (Chassis) Terminal Board...
  • Page 90 Maintenance AUH4860ZGDA 26 27 28 29 30 31 32 33 34 35 36 37 31-5001066 Rev. 0...
  • Page 91 Maintenance Material name Material name Coping Rear Grill Strainer Left Side Plate Magnet Coil (Electromagnetic Valve) Drive Board Electric Expand Valve Fitting Radiator One Way Valve Main Board Filter Board Electronic Expansion Valve Terminal Board Terminal Board Pressure Sensor Strainer Handle Axial Flow Fan Pressure Protect Switch...
  • Page 92 Maintenance IDU Exploded View and Parts Lists UUY24ZGDAA, UUY36ZGDAA 31-5001066 Rev. 0...
  • Page 93 Maintenance Material name Coping Left Side Plate Terminal Board Transformer Terminal Board Main Board Terminal Board Rear Side Plate Motor For Centrifugal Fan Brushless DC Motor Right Side Plate Water Tray Strainer Thermal Expansion Valve Choke Plug Water Tray 31-5001066 Rev. 0...
  • Page 94 Maintenance UUY36ZGDAB, UUY60ZGDAB Material name Material name Side Plate Motor for Centrifugal Fan Thermal Expansion Valve Brushless DC Motor Strainer Choke Plug Water Tray Terminal Board Transformer Temperature Sensor Terminal Board Terminal Board Water Tray Main Board Right Side Plate 31-5001066 Rev.

  • Page 95: Appendices

    Appendices Temperature Sensor Temperature/Resistance/Voltage Lists F° C° Voltage (V) F° C° Voltage (V) -4.0 0.311 80.6 13.74 1.722 -2.2 138.1 0.323 82.4 13.16 1.758 -0.4 128.6 0.345 84.2 12.6 1.793 121.6 0.362 86.0 12.07 1.829 0.381 87.8 11.57 1.863 108.7 89.6 11.09 1.897...
  • Page 96 Appendices Temperature Sensor Temperature/Resistance/Voltage Lists F° C° Voltage (V) F° C° Voltage (V) 167.0 2.205 2.877 251.6 0.547 3.184 168.8 2.133 2.889 253.4 0.532 3.187 170.6 2.064 2.901 255.2 0.519 3.19 172.4 1.997 2.912 257.0 0.505 3.192 174.2 1.933 2.923 258.8 0.492 3.195...
  • Page 97 Appendices Temperature Sensor Temperature/Resistance/Voltage Lists F° C° Voltage (V) F° C° Voltage (V) -22.0 361.8 0.173 68.0 25.01 1.466 -20.2 339.8 0.183 69.8 23.9 1.503 -18.4 319.2 0.195 71.6 22.85 1.54 -16.6 0.206 73.4 21.85 1.577 -14.8 282.2 0.218 75.2 20.9 1.614 -13.0...
  • Page 98 Appendices Temperature Sensor Temperature/Resistance/Voltage Lists F° C° Voltage (V) F° C° Voltage (V) 158.0 3.481 2.811 248.0 0.7687 3.178 159.8 3.364 2.825 249.8 0.7485 3.181 161.6 3.252 2.838 251.6 0.7289 3.184 163.4 3.144 2.852 253.4 0.7099 3.187 165.2 3.04 2.865 255.2 0.6915 3.19...
  • Page 99 Appendices Temperature Sensor Temperature/Resistance/Voltage Lists F° C° Voltage (V) F° C° Voltage (V) -22.0 911.56 0.036 64.4 67.338 0.427 -20.2 853.66 0.038 66.2 64.333 0.444 -18.4 799.98 0.041 68.0 61.478 0.462 -16.6 750.18 0.043 69.8 58.766 0.48 -14.8 703.92 0.046 71.6 56.189 0.499...
  • Page 100 Appendices Temperature Sensor Temperature/Resistance/Voltage Lists F° C° Voltage (V) F° C° Voltage (V) 150.8 9.8269 1.664 237.2 2.2409 2.696 152.6 9.4896 1.693 239.0 2.1816 2.709 154.4 9.1655 1.722 240.8 2.1242 2.722 156.2 8.9542 1.741 242.6 2.0686 2.734 158.0 8.5551 1.778 244.4 2.0148 2.747...

  • Page 101: Refrigerant R-410A Temperature/Pressure List

    Appendices Refrigerant R-410A Temperature/Pressure List PSIG °F PSIG °F PSIG °F PSIG °F –37.7 33.2 68.3 93.3 –34.7 34.1 68.9 93.8 –32.0 35.1 69.5 94.3 –29.4 35.5 70.1 94.8 –36.9 36.9 70.7 95.2 –24.5 37.8 71.4 95.7 –22.2 38.7 96.2 –20.0 39.5 72.6...
  • Page 102 Appendices Refrigerant R-410A Temperature/Pressure List PSIG °F PSIG °F PSIG °F 113.1 129.7 147.3 113.5 147.9 113.9 130.3 148.4 114.3 130.7 114.7 149.5 131.3 150.1 115.5 131.6 150.6 115.8 151.2 116.2 132.3 151.7 116.6 132.6 152.3 132.9 152.8 117.3 133.3 153.4 117.7 133.6...

  • Page 103: Operation Tools

    Appendices Refrigerant R-410A Temperature/Pressure List (kPa/°C) °C °C °C 1960 2030 2080 2130 2180 2240 2290 1020 2350 1050 2410 1090 2460 1110 2510 1150 2580 1180 2650 1220 2710 1250 2770 1280 2840 1320 2910 1350 2980 1400 3050 1440 3100 1470...
  • Page 104 31-5001066 Rev. 0...

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