Gree FLEXX Series Service Manual
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Gree FLEXX Series Service Manual

Dc inverter heat pump condensing unit
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FLEXX
DC INVERTER HEAT PUMP
CONDENSING UNIT SERVICE MANUAL
(GC202006-I)
Capacity: 24kBtu/h~60kBtu/h
Rate Frequency: 60Hz
Operation Range:
Cooling: 5°F(-15°C)~129.2° F(54° C )
Heating: -22°F (-30°C)~75.2°F (24°C)
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Do you have a question about the FLEXX Series and is the answer not in the manual?

Questions and answers

Will Prier
March 28, 2025

my inside blower unit keeps heating when it is not calling for heat. this is on a 3 zone condensor

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1 comments:
Mr. Anderson
March 28, 2025

The Gree FLEXX Series indoor blower may keep heating when not calling for heat due to a control issue. According to the control logic, the compressor cannot restart immediately after stopping and must wait a few minutes, and the indoor fan may run before or after compressor operation. If the electronic expansion valve or control board malfunctions, it could cause unintended operation. Additionally, sensor errors or communication issues between the drive board and master control board may result in incorrect heating behavior.

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Summary of Contents for Gree FLEXX Series

  • Page 1 FLEXX DC INVERTER HEAT PUMP CONDENSING UNIT SERVICE MANUAL (GC202006-I) Capacity: 24kBtu/h~60kBtu/h Rate Frequency: 60Hz Operation Range: Cooling: 5°F(-15°C)~129.2° F(54° C ) Heating: -22°F (-30°C)~75.2°F (24°C)
  • Page 2 Foreword Thank you for choosing Gree air conditioner/heat pumps. In order to correctly install and use our units, and for the satisfactory operation effect, please read this manual carefully. This manual specifies safe operation requirements from perspectives of product introduction, control, troubleshooting and maintenance, as well as basic principles and implementation methods.

  • Page 3: Table Of Contents

    CONTENTS 1 Product Introduction ...................... 3 1.1 Lists of Units .......................... 3 1.2 Electrical Parameters ......................5 2 Control ..........................6 2.1 Operation Mode ........................6 2.2 Control Mode ......................... 8 2.3 Functions ..........................10 3 Troubleshooting ......................14 3.1 Wiring Diagrams ........................14 3.2 PCB Layout ..........................
  • Page 4 GREE DC INVERTER HEAT PUMP CONDENSING UNIT Safety Notice on Maintenance PROHIBITED： (1) Do not pierce or burn. (2) Please note that refrigerant may be odorless. (3) The appliance shall be stored in a room without continuously operating ignition sources (For example: open flames, an operating gas appliance or an operating electric heater).
  • Page 5 GREE DC INVERTER HEAT PUMP CONDENSING UNIT high speed; Otherwise personal injury may occur. (5) Measure the insulation resistance after maintenance. The resistance must be 1M or higher. Bad insulation may lead to electric shock. (6) Welding and cutting work must be done in a well-ventilated place.

  • Page 6: Product Introduction

    GREE DC INVERTER HEAT PUMP CONDENSING UNIT 1 Product Introduction 1.1 Lists of Units 1.1.1 List of Outdoor Units Power Supply Model Finished Product Code Appearance V/Ph/Hz FLEXX36HP230V1AO 208/230V-1Ph-60Hz CF090W1530 FLEXX60HP230V1AO 208/230V-1Ph-60Hz CF090W1820...
  • Page 7 GREE DC INVERTER HEAT PUMP CONDENSING UNIT 1.1.2 List of Indoor Units Power Supply Cooling/Heating Finished Model Appearance Capacity (Btu/h) Product Code V/Ph/Hz Airhandler 24000/24000 208/230V-1Ph-60Hz EH010N0040 FLEXX24HP230V1AH Airhandler 36000/36000 208/230V-1Ph-60Hz EM116N0890 FLEXX36HP230V1AH Airhandler 48000/48000 208/230V-1Ph-60Hz EH010N0050 FLEXX48HP230V1AH Airhandler 54000/54000...

  • Page 8: Electrical Parameters

    GREE DC INVERTER HEAT PUMP CONDENSING UNIT 1.2 Electrical Parameters Power supply Circuit breaker capacity Model V/Ph/Hz FLEXX36HP230V1AO 208/230V-1Ph-60Hz FLEXX60HP230V1AO 208/230V-1Ph-60Hz Power Supply Fuse Capacity Circuit Breaker Capacity Model V/Ph/Hz FLEXX24HP230V1AH 208/230V-1Ph-60Hz 3.15 FLEXX36HP230V1AH 208/230V-1Ph-60Hz 3.15 FLEXX48HP230V1AH 208/230V-1Ph-60Hz 3.15 FLEXX60HP230V1AH 208/230V-1Ph-60Hz 3.15...

  • Page 9: Control

    GREE DC INVERTER HEAT PUMP CONDENSING UNIT 2 Control 2.1 Operation Mode 2.1.1 Cooling Mode...
  • Page 10 GREE DC INVERTER HEAT PUMP CONDENSING UNIT 2.1.2 Heating Mode...

  • Page 11: Control Mode

    GREE DC INVERTER HEAT PUMP CONDENSING UNIT 2.2 Control Mode 2.2.1 Based Control 2.2.1.1 Compressor Control When cooling or heating mode is turned on, indoor fan will run for a while before the compressor starts. Under different modes, the compressor can only be stopped after running for some time (special cases excluded).
  • Page 12 GREE DC INVERTER HEAT PUMP CONDENSING UNIT and outdoor and indoor fan will both stop. When the temperature sensed by outdoor tube temperature sensor reaches the preset value of defrosting stop, system will quit defrosting. The 4-way valve will switch back to the heating condition, compressor and outdoor unit fan restart.

  • Page 13: Functions

    GREE DC INVERTER HEAT PUMP CONDENSING UNIT detected open for continuously a little time. Under discharge high temperature protection, system will be shut down and display error code E4. When discharge high temperature protection occurs, system will restore operation if the discharge high temperature sensor is detected to be reclosed within a few minutes after shutdown.
  • Page 14 GREE DC INVERTER HEAT PUMP CONDENSING UNIT 2.3.3 Set Operating Mode The third dip switch and the fourth dip switch are selecting the operating mode. Standard mode is the conventional mode. By setting the strong mode dip switches of the condensing unit, the air conditioner can quickly increase the capacity output and ensure reliable operation in a short time, so as to meet the user's demand for the indoor temperature to quickly reach the set temperature.
  • Page 15 GREE DC INVERTER HEAT PUMP CONDENSING UNIT Level 3 Capacity 48K indoor unit dip switches 60K indoor unit dip switches Level 1 (Default) Level 2 Level 3 2.3.5 Forced Defrost Control Press and hold "SW1" for about 5s to enter the first level menu of the debugging mode, the outdoor unit mainboard LED displayer flashes.
  • Page 16 GREE DC INVERTER HEAT PUMP CONDENSING UNIT switching to "09", short press "SW2" or "SW3" to enter the forced operation control mode, "01" denotes that turn on the forced operation cooling mode; "02" denotes that turn on the forced operation cooling mode; "OF"...

  • Page 17: Troubleshooting

    GREE DC INVERTER HEAT PUMP CONDENSING UNIT 3 Troubleshooting 3.1 Wiring Diagrams The following electric diagram is for reference only. Please refer to diagram sticked on the unit as the latest version. 3.1.1 Wiring Diagrams of ODUS Model: FLEXX36HP230V1AO...
  • Page 18 GREE DC INVERTER HEAT PUMP CONDENSING UNIT Model:FLEXX60HP230V1AO 3.1.2 Wiring Diagrams of IDUs Model:FLEXX24HP230V1AH, FLEXX36HP230V1AH...
  • Page 19 GREE DC INVERTER HEAT PUMP CONDENSING UNIT Model: FLEXX48HP230V1AH, FLEXX60HP230V1AH...

  • Page 20: Pcb Layout

    GREE DC INVERTER HEAT PUMP CONDENSING UNIT 3.2 PCB Layout 3.2.1 Interface Indoor unit: Model: FLEXX24HP230V1AH，FLEXX36HP230V1AH，FLEXX48HP230V1AH, FLEXX60HP230V1AH Mainboard Printing Interface Printing Interface AC-N（X2） Neutral wire input X9(G_SCAN) Indoor motor check AC motor high speed AC-L （X1） Live wire input X14(OFAN-H-OUT)
  • Page 21 GREE DC INVERTER HEAT PUMP CONDENSING UNIT Pinboard Printing Interface Printing Interface DC-MOTOR1 DC motor output COM2 DC motor control signal input...
  • Page 22 GREE DC INVERTER HEAT PUMP CONDENSING UNIT Outdoor unit: Model: FLEXX36HP230V1AO，FLEXX60HP230V1AO Mainboard Printing Interface Printing Interface AC-L Live wire input H-PRESS High pressure sensor interface System low pressure protection AC-N Neutral wire input interface System high pressure protection HEAT_TIE_B Chassis electric heating belt interface 2.
  • Page 23 GREE DC INVERTER HEAT PUMP CONDENSING UNIT Printing Interface Printing Interface Electromagnetic valve COM7 Unit communication interface interface Electronic expansion valve GPRS communication interface interface Electronic expansion valve 1 interface COM-MANUAL Thermostat interface Refrigerant heat dissipation Drive communication DC_MOTOR1 COMM1...
  • Page 24 GREE DC INVERTER HEAT PUMP CONDENSING UNIT Printing Interface Printing Interface Communication terminal, same with COMM Compressor V phase terminal COMM1 Drive power supply terminal Compressor W phase terminal DC-MOTOR1 DC fan terminal JTAG1 Programming interface (for testing) DC-BUS1 Power discharge terminal (for testing)
  • Page 25 GREE DC INVERTER HEAT PUMP CONDENSING UNIT Filtering Board: Model: FLEXX36HP230V1AO ⑩ ⑩ ⑩ ⑩ ⑩ ⑩ ⑩ 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...
  • Page 26 GREE DC INVERTER HEAT PUMP CONDENSING UNIT 3.2.2 IPM, PFC Testing Method 3.2.2.1Method of Testing IPM Module (1) Preparation before test: prepare a universal meter and turn to its diode option, and then remove the wires U, V, W of the compressor after it is powered off for one minute.
  • Page 27 GREE DC INVERTER HEAT PUMP CONDENSING UNIT FLEXX36HP230V1AO FLEXX60HP230V1AO...

  • Page 28: Error Code

    GREE DC INVERTER HEAT PUMP CONDENSING UNIT 3.3 Error Code Error code Error Compressor high pressure protection Compressor low pressure protection Compressor air discharge high-temperature protection Condenser temperature sensor error Outdoor ambient temperature sensor error Discharge temperature sensor error ODU tube temperature sensor error...

  • Page 29: Troubleshooting

    GREE DC INVERTER HEAT PUMP CONDENSING UNIT 3.4 Troubleshooting 3.4.1 “E1” Compressor High Pressure Protection Error display: ODU mainboard LED displayer Error judgment condition and method: It is judged through the action of high pressure switch. If the high pressure switch is cut off, it is judged that high pressure is too high and the system stops operation for protection.
  • Page 30 GREE DC INVERTER HEAT PUMP CONDENSING UNIT Troubleshooting：...
  • Page 31 GREE DC INVERTER HEAT PUMP CONDENSING UNIT 3.4.2 “E3” Compressor Low-pressure Protection, Refrigerant Shortage Protection, Refrigerant Recovery Mode Error display: ODU mainboard LED displayer Error judgment condition and method: It is judged through the action of low pressure switch. If the low pressure switch is cut off, it is judged that low pressure is too low and the system stops operation for protection.
  • Page 32 GREE DC INVERTER HEAT PUMP CONDENSING UNIT Troubleshooting： E3 protection Enter Charge debugging mode refrigerant through wired Check if the according to the controller and select system low requirement and without refrigerant pressure is lower then turn on the unit lacking protection;...
  • Page 33 GREE DC INVERTER HEAT PUMP CONDENSING UNIT Possible reason： ■Cut-off valve of ODU is not fully opened; ■Electronic expansion valve is abnormal; ■Outdoor or indoor fan is not working properly; ■IDU filter or air duct is blocked (cooling mode); ■Ambient temperature exceeds allowable operation range;...
  • Page 34 GREE DC INVERTER HEAT PUMP CONDENSING UNIT Troubleshooting： 3.4.4 “F2” Condenser Temperature Sensor Error Error display: ODU mainboard LED displayer Error judgment condition and method: Sample the AD value of temperature sensor through temperature sensor detecting circuit and judge the...
  • Page 35 GREE DC INVERTER HEAT PUMP CONDENSING UNIT the error. Possible reason: ■Poor contact between temperature sensor and terminal in mainboard interface ■Temperature sensor is abnormal ■Detecting circuit is abnormal Troubleshooting： Malfunction of condenser temperature sensor Check if the condenser Correctly insert the...
  • Page 36 GREE DC INVERTER HEAT PUMP CONDENSING UNIT Possible reason: ■Poor contact between ambient temperature sensor and terminal in mainboard interface ■Ambient temperature sensor is abnormal ■Detecting circuit is abnormal Troubleshooting： NOTE: Please refer to Appendix 1 for temperature and resistance of temperature sensor.
  • Page 37 GREE DC INVERTER HEAT PUMP CONDENSING UNIT Possible reason: ■Poor contact between temperature sensor and terminal in mainboard interface ■Temperature sensor is abnormal ■Detecting circuit is abnormal Troubleshooting： Malfunction of discharge temperature sensor Check if the Correctly insert the discharge temperature sensor on...
  • Page 38 GREE DC INVERTER HEAT PUMP CONDENSING UNIT Possible reason: ■Poor contact between temperature sensor and terminal in mainboard interface ■Temperature sensor is abnormal ■Detecting circuit is abnormal Troubleshooting： Malfunction of discharge temperature sensor Check if the Correctly insert the discharge temperature sensor on...
  • Page 39 GREE DC INVERTER HEAT PUMP CONDENSING UNIT Troubleshooting: Malfunction of ODU memory chip error Replace the outdoor mainboard 3.4.9 “H4” Overload Error display: ODU mainboard LED displayer Error judgment condition and method: When condensing pressure is higher than the protection value, system will report overload protection.
  • Page 40 GREE DC INVERTER HEAT PUMP CONDENSING UNIT Troubleshooting： Overload Outdoor heat exchanger is blocked Remove the obstacle Indoor heat exchanger is blocked . Remove the obstacle Ambient temperature is out of the Normal protection . No operation range need to handle it .
  • Page 41 GREE DC INVERTER HEAT PUMP CONDENSING UNIT Drive board IPM module’s 15V power supply is lower than 13.5V. ■ Drive board 6-line PWM signal and the corresponding element are abnormal. ■ Drive board compressor current sampling circuit element is damaged or drive chip current sampling AD terminal ■...
  • Page 42 GREE DC INVERTER HEAT PUMP CONDENSING UNIT Possible reason: ■Outdoor fan wiring terminal is not correctly connected to the mainboard. ■Outdoor fan is damaged. ■If it is a new unit or a new motor has been replaced in the unit and the wire connection is correct, then probably it is the program that goes wrong.
  • Page 43 GREE DC INVERTER HEAT PUMP CONDENSING UNIT ■Drive board compressor current sampling circuit element is damaged or drive chip current sampling AD terminal is abnormal. ■Compressor is damaged. Troubleshooting：...
  • Page 44 GREE DC INVERTER HEAT PUMP CONDENSING UNIT 3.4.13 “HC” PFC Protection Error display: ODU mainboard LED displayer Error judgment condition and method: After power is connected, and drive chip received PFC lead F0 that is of low level, than it is PFC module malfunction.
  • Page 45 GREE DC INVERTER HEAT PUMP CONDENSING UNIT 3.4.14 “Lc” Startup Failure Error display: ODU mainboard LED displayer Error judgment condition and method: Check the error code on nixie tube of ODU main control board. If PJ is displayed, it indicates...
  • Page 46 GREE DC INVERTER HEAT PUMP CONDENSING UNIT 3.4.15 “P0” Driver Reset Protection Error display: ODU mainboard LED displayer Error judgment condition and method: Drive board chip resets and starts initialization. After the drive board is energized for 5s, it detects that the chip resets again.
  • Page 47 GREE DC INVERTER HEAT PUMP CONDENSING UNIT ■Drive board current sampling circuit element is damaged or drive chip current sampling AD terminal is abnormal. ■Compressor is damaged. Troubleshooting： 3.4.17 “P6” Master Control and Driver Communication Error Error display: ODU mainboard LED displayer...
  • Page 48 GREE DC INVERTER HEAT PUMP CONDENSING UNIT ■The switch power of drive board is abnormal, therefore, the 3.3V power voltage is abnormal. ■Communication circuit of the drive board or the master control board is abnormal. Troubleshooting： 3.4.18 “P7” Driver Module Sensor Error...
  • Page 49 GREE DC INVERTER HEAT PUMP CONDENSING UNIT Troubleshooting： 3.4.19 “P8” Driver Module High Temperature Protection Error display: ODU mainboard LED displayer Error judgment condition and method: If IPM module temperature or PFC module temperature exceeds the set protection value, then it can be judged that driver module temperature is too high and system will shut down for protection.
  • Page 50 GREE DC INVERTER HEAT PUMP CONDENSING UNIT 3.4.20 “PA” AC Current Protection Error display: ODU mainboard LED displayer Error judgment condition and method: If input current value exceeds the set protection value, then it can be judged that AC current protection occurs and system will shut down for protection.
  • Page 51 GREE DC INVERTER HEAT PUMP CONDENSING UNIT Possible reason: ■Current detection (or current sensor) sampling circuit element is abnormal. ■Drive chip compressor current sampling AD terminal is badly welded or short-circuited. Troubleshooting： 3.4.22 “PL” Bus Low-Voltage Protection Error display: ODU mainboard LED displayer...
  • Page 52 GREE DC INVERTER HEAT PUMP CONDENSING UNIT 3.4.23 “PH” Bus High-Voltage Protection Error display: ODU mainboard LED displayer Error judgment condition and method: If there is no other malfunction and the busbar voltage is higher than the set value for high voltage protection, then it can be judged that bus high-voltage protection occurs.
  • Page 53 GREE DC INVERTER HEAT PUMP CONDENSING UNIT Troubleshooting： 3.4.25 “ee” Drive Memory Chip Error Error display: ODU mainboard LED displayer Error judgment condition and method: If power is connected but the drive board with memory chip cannot detect the memory chip or read the memory chip data correctly, then it can be judged that drive memory chip error exists.
  • Page 54 GREE DC INVERTER HEAT PUMP CONDENSING UNIT 3.4.26 “e1” High Pressure Sensor Error Error display: ODU mainboard LED displayer Sample the AD value of pressure sensor through pressure sensor detecting circuit and judge the range of AD value, If the sampling AD value exceeds upper limit and lower limit in 30 seconds continuously, report the error.
  • Page 55 GREE DC INVERTER HEAT PUMP CONDENSING UNIT Possible reason: ■Jumper cap is not installed ■Jumper cap model is wrong ■Detecting circuit is abnormal Troubleshooting：...

  • Page 56: Failures Not Caused By Errors

    GREE DC INVERTER HEAT PUMP CONDENSING UNIT 3.5 Failures Not Caused by Errors (1) If your air conditioner fails to function normally, please first check the following items before maintenance: Problem Cause Corrective measure If you turn off the unit and then immediately turn it on, in order to protect the compressor and avoid Please wait for a while.
  • Page 57 Check the above items and adopt the corresponding corrective measures. If the air conditioner continues to function poorly, please stop the air conditioner immediately and contact Gree’s authorized local service center. Ask our professional service staff to check and repair the unit.

  • Page 58: Maintenance

    GREE DC INVERTER HEAT PUMP CONDENSING UNIT 4 Maintenance 4.1 System Diagram 4.2 Connection Pipe Vacuum Pumping NOTICE Make sure the outlet of vacuum pump is away from fire source and is well-ventilated. ① Before vacuum pumping, make sure the unit cut-off valves are closed.
  • Page 59 GREE DC INVERTER HEAT PUMP CONDENSING UNIT (6) Wait for 10min to see if the system pressure can remain unchanged. If the pressure increase, there may be leakage. (7) Slightly open the liquid valve and let some refrigerant go to the connection pipe to balance the pressure inside and outside of the connection pipe, so that air will not come into the connection pipe when removing the hose.

  • Page 60: Refrigerant Charging

    GREE DC INVERTER HEAT PUMP CONDENSING UNIT 4.3 Refrigerant Charging Pre-charging Step 1: Connect the high pressure gauge line to the valve of liquid pipe and connect the low pressure gauge line to the valve of gas pipe. Connect the middle gauge line to the vacuum pump. Power on the vacuum pump and perform vacuum drying.
  • Page 61 GREE DC INVERTER HEAT PUMP CONDENSING UNIT Refrigerant charging when unit is turned on: Step 1: Close the valve of refrigerant tank. First remove the pressure gauge lines and connect the outdoor unit to the indoor unit. Then reconnect the pressure gauge lines. Connect the low pressure gauge line to the other joint of gas valve and connect the high pressure gauge line to the liquid valve.

  • Page 62: Maintenance Of Major Components

    GREE DC INVERTER HEAT PUMP CONDENSING UNIT 4.4 Maintenance of Major Components 4.4.1 Replacement of thermostat Please refer to the instruction manual of thermostat XE70-00/E1. 4.4.2 How to replace the compressor 4.4.2.1 Diagnosis of compressor failure A. On condition that the unit can be started up Step 1: If the unit can be started up, then start it up to check the current of the faulted compressor.
  • Page 63 GREE DC INVERTER HEAT PUMP CONDENSING UNIT Step 2: Judge whether the operating noise of the compressor is normal, and whether there is a sharp noise or obvious scraping. If there is a normal compressor working nearby, compare their operating noise.
  • Page 64 GREE DC INVERTER HEAT PUMP CONDENSING UNIT This is the position of the 4-way valve. Do not touch it directly with your hands. There is hot refrigerant at the exhaust pipe, so be careful not to be scalded. D- Connect to the exhaust side...
  • Page 65 GREE DC INVERTER HEAT PUMP CONDENSING UNIT Please refer to the IPM checking method in the section of troubleshooting. B．On condition that the unit cannot be started up Step 1: Cut off the power supply and detach the cover of the wiring box of the compressor. Check the wiring of the compressor.
  • Page 66 GREE DC INVERTER HEAT PUMP CONDENSING UNIT balance mouth. The suction and exhaust openings of the compressors must be sealed. If a rubber seal is missing, user adhesive tape to seal the opening. This is to prevent the compressor oil from contacting the air.
  • Page 67 GREE DC INVERTER HEAT PUMP CONDENSING UNIT (2) Prepare relevant tools 1) Prepare nitrogen. Please strictly follow the nitrogen welding standards during the welding process. Make sure there is sufficient nitrogen. The nitrogen pressure should be above 2.0MPa; 2) Prepare welding rods. Prepare some welding rods of common specifications and some special welding rods that contain more than 5% silver.
  • Page 68 GREE DC INVERTER HEAT PUMP CONDENSING UNIT (2) Place the compressor at a position above the ground level and then pour out the oil from the air outlet of the compressor. Collect the oil in a transparent container. The amount of oil should be over 150ml.
  • Page 69 GREE DC INVERTER HEAT PUMP CONDENSING UNIT 1. Remove the screw bolt of the separator. 2. Remove the screw bolt of the separator. 3. Remove the separator. When the separator is detached, check whether there are impurities inside. Below is the checking method: NOTE: When pouring the liquid from the separator, make sure the discharge pipe is at the lower position.Slant at an...
  • Page 70 GREE DC INVERTER HEAT PUMP CONDENSING UNIT Step 8: Replace the compressor For the removal of compressor, please refer to the section: Removal of Major Components. Step 9: Check/Replace the gas-liquid separator NOTE: If a compressor is damaged and needs to be replaced, its gas-liquid separator should also be replaced. This is to avoid the abnormal condition of the separator from affecting the safe and reliable operation of the system.
  • Page 71 GREE DC INVERTER HEAT PUMP CONDENSING UNIT 4.4.3 How to replace the drive module of compressor Step 1: First, make sure that power is cut off. Set the universal meter at the AC voltage and measure the voltage between L1, L2, L3, and N. If each time the voltage is 0V (Errors may occur to the universal meter, sometimes the voltage may not be 0V), proceed with the next step and put a sign on the power switch that reads “Under maintenance, don’t switch on”.

  • Page 72: Removal Of Major Components

    GREE DC INVERTER HEAT PUMP CONDENSING UNIT 4.5 Removal of Major Components 4.5.1 Removal of ODU Major Components Picture Name Function Through compression, the low pressure refrigerant occupies a less space. Compressor As its pressure and temperature both rise, it becomes high pressure and high temperature refrigerant.
  • Page 73 GREE DC INVERTER HEAT PUMP CONDENSING UNIT Picture Name Function Accumulator Flash refrigerant from liquid to gas It is used to transfer partial heat of the hot flow to the cold flow so that the Condenser flow temperature can reach the specified index. It is an energy exchanging device.
  • Page 74 GREE DC INVERTER HEAT PUMP CONDENSING UNIT Model:FLEXX36HP230V1AO Removal of front panel NOTE: Before removing the front panel, make sure power is cut off. Step Picture Work instruction Unscrew the screws of the  1. Remove the upper cover upper cover plate with a plate.
  • Page 75 GREE DC INVERTER HEAT PUMP CONDENSING UNIT Removal of front panel NOTE: Before removing the front panel, make sure power is cut off. Step Picture Work instruction Unscrew the screws that  connect the right side plate 5. Remove the right side plate.
  • Page 76 GREE DC INVERTER HEAT PUMP CONDENSING UNIT Removal of front panel NOTE: Before removing the front panel, make sure power is cut off. Step Picture Work instruction Fix the clasps on both sides  9. Install the front side plate.
  • Page 77 GREE DC INVERTER HEAT PUMP CONDENSING UNIT Removal of compressor/gas liquid separator NOTE: Before removing the compressor/gas liquid separator, make sure there is no refrigerant in the pipeline and power is cut off. Step Picture Work instruction Weld the pipes that are ...
  • Page 78 GREE DC INVERTER HEAT PUMP CONDENSING UNIT Removal of compressor/gas liquid separator NOTE: Before removing the compressor/gas liquid separator, make sure there is no refrigerant in the pipeline and power is cut off. Step Picture Work instruction After replacing the ...
  • Page 79 GREE DC INVERTER HEAT PUMP CONDENSING UNIT Model: FLEXX36HP230V1AO Removal of 4-way valve NOTE: Before removing the 4-way valve, make sure refrigerant is fully discharged from the unit and power is cut off. Step Picture Work instruction Carefully unscrew the ...
  • Page 80 GREE DC INVERTER HEAT PUMP CONDENSING UNIT Removal of 4-way valve NOTE: Before removing the 4-way valve, make sure refrigerant is fully discharged from the unit and power is cut off. Step Picture Work instruction Tighten the screws of the ...
  • Page 81 GREE DC INVERTER HEAT PUMP CONDENSING UNIT Removal of fan and motor Note: Before removing the fan, make sure power is cut off. Step Picture Work instruction Use a screwdriver to  unscrew the bolt of motor. 3. Remove motor.
  • Page 82 GREE DC INVERTER HEAT PUMP CONDENSING UNIT Model: FLEXX36HP230V1AO Removal of condenser NOTE:Before removing the condenser, make sure there is no refrigerant in the pipeline and power is cut off. Step Picture Work instruction Remove the upper, lower and ...
  • Page 83 GREE DC INVERTER HEAT PUMP CONDENSING UNIT Removal of condenser NOTE:Before removing the condenser, make sure there is no refrigerant in the pipeline and power is cut off. Step Picture Work instruction Heat up the welding points of  connection pipes through gas welding until the pipes break off.
  • Page 84 GREE DC INVERTER HEAT PUMP CONDENSING UNIT Removal of condenser NOTE:Before removing the condenser, make sure there is no refrigerant in the pipeline and power is cut off. Step Picture Work instruction Put the electric box in place  7. Secure the electric box...
  • Page 85 GREE DC INVERTER HEAT PUMP CONDENSING UNIT Model: FLEXX36HP230V1AO Removal of electronic expansion valve NOTE:Before removing the electronic expansion valve, make sure there is no refrigerant in the pipeline and power is cut off. Step Picture Work instruction Remove the upper, lower ...
  • Page 86 GREE DC INVERTER HEAT PUMP CONDENSING UNIT Removal of electronic expansion valve NOTE:Before removing the electronic expansion valve, make sure there is no refrigerant in the pipeline and power is cut off. Step Picture Work instruction Take off the coil of ...
  • Page 87 GREE DC INVERTER HEAT PUMP CONDENSING UNIT Removal of electronic expansion valve NOTE:Before removing the electronic expansion valve, make sure there is no refrigerant in the pipeline and power is cut off. Step Picture Work instruction 6. Secure the Put the electric box back ...
  • Page 88 GREE DC INVERTER HEAT PUMP CONDENSING UNIT Removal of front panel NOTE: Before removing the front panel, make sure power is cut off. Step Picture Work instruction Unscrew the screws of the  2. Remove the front plate. front plate with a screwdriver.
  • Page 89 GREE DC INVERTER HEAT PUMP CONDENSING UNIT Removal of front panel NOTE: Before removing the front panel, make sure power is cut off. Step Picture Work instruction Attach the grill back in place  6. Install the grill. and tighten up the screws.
  • Page 90 GREE DC INVERTER HEAT PUMP CONDENSING UNIT Removal of front panel NOTE: Before removing the front panel, make sure power is cut off. Step Picture Work instruction Attach the grill back in place  10. Install the grill. and tighten up the screws.
  • Page 91 GREE DC INVERTER HEAT PUMP CONDENSING UNIT Model: FLEXX60HP230V1AO Disassembly of compressor NOTE:Before removing the compressor, make sure there is no refrigerant in the pipeline and power is cut off. Step Picture Work instruction Loosen the securing screws  of the wires with a screwdriver.
  • Page 92 GREE DC INVERTER HEAT PUMP CONDENSING UNIT Disassembly of compressor NOTE:Before removing the compressor, make sure there is no refrigerant in the pipeline and power is cut off. Step Picture Work instruction Take out the compressor  and replace it.
  • Page 93 GREE DC INVERTER HEAT PUMP CONDENSING UNIT Disassembly of compressor NOTE:Before removing the compressor, make sure there is no refrigerant in the pipeline and power is cut off. Step Picture Work instruction Connect the compressor  wires to the wire terminals on the top of compressor.
  • Page 94 GREE DC INVERTER HEAT PUMP CONDENSING UNIT Removal of 4-way valve NOTE:Before removing the 4-way valve, make sure refrigerant is fully discharged from the unit and power is cut off. Step Picture Work instruction Use a soldering gun to ...
  • Page 95 GREE DC INVERTER HEAT PUMP CONDENSING UNIT Model: FLEXX60HP230V1AO Removal of fan and motor NOTE: Before removing the fan, make sure power is cut off. Step Picture Work instruction Use a screwdriver to  unscrew the two screws on 1. Remove the grill.
  • Page 96 GREE DC INVERTER HEAT PUMP CONDENSING UNIT Removal of fan and motor NOTE: Before removing the fan, make sure power is cut off. Step Picture Work instruction Replace with a new motor.  4. Install the motor. Then tighten up the screw bolt.
  • Page 97 GREE DC INVERTER HEAT PUMP CONDENSING UNIT Model: FLEXX60HP230V1AO Removal of gas liquid separator NOTE: Before removing the gas liquid separator, make sure there is no refrigerant in the pipeline and power is cut off. Step Picture Work instruction Remove the upper, lower and ...
  • Page 98 GREE DC INVERTER HEAT PUMP CONDENSING UNIT Removal of gas liquid separator NOTE: Before removing the gas liquid separator, make sure there is no refrigerant in the pipeline and power is cut off. Step Picture Work instruction Install the gas liquid separator ...
  • Page 99 GREE DC INVERTER HEAT PUMP CONDENSING UNIT Model: FLEXX60HP230V1AO Removal of electronic expansion valve NOTE:Before removing the electronic expansion valve, make sure there is no refrigerant in the pipeline and power is cut off. Step Picture Work instruction Remove the upper, lower and ...
  • Page 100 GREE DC INVERTER HEAT PUMP CONDENSING UNIT Removal of electronic expansion valve NOTE:Before removing the electronic expansion valve, make sure there is no refrigerant in the pipeline and power is cut off. Step Picture Work instruction 4. Take out the electronic Take out the electronic ...
  • Page 101 GREE DC INVERTER HEAT PUMP CONDENSING UNIT Removal of electronic expansion valve NOTE:Before removing the electronic expansion valve, make sure there is no refrigerant in the pipeline and power is cut off. Step Picture Work instruction ● Check whether each component and connection wire is well 7.
  • Page 102 GREE DC INVERTER HEAT PUMP CONDENSING UNIT Disassembly and Assembly of the Electric Box Step Picture Work instruction ● Disconnect the electric element from the wiring terminal. ● Loosen screws around the electric 3. Remove the electric element. element with a screwdriver.
  • Page 103 GREE DC INVERTER HEAT PUMP CONDENSING UNIT Disassembly and Assembly of the Fan Motor Step Picture Work instruction ● Disconnect the wires of the fan from the wiring terminal and draw them out. 2. Remove the fan. ● Loosen screws located at the front of the fan with a screwdriver.
  • Page 104 GREE DC INVERTER HEAT PUMP CONDENSING UNIT Disassembly and Assembly of the Evaporator and Drain Pan Step Picture Work instruction ● Loosen screws round the lower panel 2. Remove the lower panel (1) with a screwdriver. and panel (2). ● Remove the lower panel from unit.
  • Page 105 GREE DC INVERTER HEAT PUMP CONDENSING UNIT Disassembly and Assembly of the Evaporator and Drain Pan Step Picture Work instruction 6. Remove the secondary drain ● Remove the secondary drain pan from pan. the unit. ● Remove the evaporator away from the 7.
  • Page 106 GREE DC INVERTER HEAT PUMP CONDENSING UNIT Disassembly and Assembly of the Filter Step Picture Work instruction ● Remove the filter screen away from the unit. 2. Remove the filter screen. ● After replacing the filter screen, reassemble the unit as before.

  • Page 107: Explosive View And Lists Of Parts

    GREE DC INVERTER HEAT PUMP CONDENSING UNIT 4.6 Explosive View and Lists of Parts 4.6.1 ODU Explosive View and Lists of Parts FLEXX36HP230V1AO (Product code: CF090W1530) 29 30 31 34 35 36 37 Material name Coping Electric Box Assy PFC Inductance...
  • Page 108 GREE DC INVERTER HEAT PUMP CONDENSING UNIT Material name Inductance Terminal Board Terminal Board Radiator Main Board Condenser Assy Filter Sub-Assy Electromagnetic Valve Sub-Assy Magnet Coil (Electromagnetic Valve) Electromagnetic Valve Strainer Brushless DC Motor Axial Flow Fan Cabinet Diversion Circle...
  • Page 109 GREE DC INVERTER HEAT PUMP CONDENSING UNIT Material name Filter Pressure Protect Switch 4-Way Valve Pressure Sensor Rear Grill FLEXX60HP230V1AO (Product code: CF090W1820) 27 28 29 30 31 36 37 Material name Coping Rear Grill Left Side Plate Electric Box Assy...
  • Page 110 GREE DC INVERTER HEAT PUMP CONDENSING UNIT Material name Main Board Filter Board Terminal Board Terminal Board Inductance Box Assy Handle Axial Flow Fan Cabinet Brushless DC Motor Gas-liquid Separator Sub-Assy Front Grill Front Side Plate Pressure Protect Switch Brushless DC Motor...
  • Page 111 GREE DC INVERTER HEAT PUMP CONDENSING UNIT 4.6.2 IDU Explosive View and Lists of Parts FLEXX36HP230V1AH (Product code: EM116N0890) FLEXX60HP230V1AH (Product code: EH010N0031) 1 Material name Coping Left Side Plate Electric Box Assy Terminal Board Transformer Terminal Board Main Board...
  • Page 112 GREE DC INVERTER HEAT PUMP CONDENSING UNIT Material name Rear Side Plate Centrifugal Fan Assy Motor For Centrifugal Fan Brushless DC Motor Top Cover Board Sub-Assy Bottom Cover Plate Assy Right Side Plate Bottom Cover Plate Assy Water Tray Strainer...

  • Page 113: Appendices

    GREE DC INVERTER HEAT PUMP CONDENSING UNIT Appendices 1 Resistance/Temperature Lists of Temperature Sensors 1.1 Voltage List of 15 KΩ Temperature Sensors (including ODU temperature sensors) Temperature (℃) Resistance (kΩ) Voltage (V) Temperature (℃) Resistance (kΩ) Voltage (V) 0.311 2.523 2.825...
  • Page 114 GREE DC INVERTER HEAT PUMP CONDENSING UNIT Temperature (℃) Resistance (kΩ) Voltage (V) Temperature (℃) Resistance (kΩ) Voltage (V) 23.6 1.282 0.848 3.123 22.53 1.319 0.825 3.128 21.51 1.356 0.802 3.133 20.54 1.393 0.779 3.137 19.63 1.429 0.758 3.141 18.75 1.467...

  • Page 115: Voltage List Of 20 Kω Pipeline Temperature Sensors

    GREE DC INVERTER HEAT PUMP CONDENSING UNIT Temperature (℃) Resistance (kΩ) Voltage (V) Temperature (℃) Resistance (kΩ) Voltage (V) 3.579 2.664 0.266 3.242 3.454 2.682 0.261 3.244 3.333 0.254 3.245 3.217 2.717 0.248 3.246 3.105 2.734 0.243 3.247 2.998 2.75 0.237...
  • Page 116 GREE DC INVERTER HEAT PUMP CONDENSING UNIT Temperature (℃) Resistance (kΩ) Voltage (V) Temperature (℃) Resistance (kΩ) Voltage (V) 68.79 0.743 1.561 3.061 65.37 0.773 1.515 3.068 62.13 0.804 1.47 3.074 59.08 0.835 1.427 3.08 56.19 0.866 1.386 3.086 53.46 0.898...

  • Page 117: Voltage List Of 50 Kω Discharge Temperature Sensors

    GREE DC INVERTER HEAT PUMP CONDENSING UNIT Temperature (℃) Resistance (kΩ) Voltage (V) Temperature (℃) Resistance (kΩ) Voltage (V) 9.42 2.243 0.4727 3.224 9.054 2.272 0.4613 3.226 8.705 2.299 0.4502 3.227 8.37 2.326 0.4394 3.229 8.051 2.353 0.4289 3.231 7.745 2.379...
  • Page 118 GREE DC INVERTER HEAT PUMP CONDENSING UNIT Temperature (℃) Resistance (kΩ) Voltage (V) Temperature (℃) Resistance (kΩ) Voltage (V) 362.99 0.088 6.9882 1.943 342.83 0.094 6.7608 1.969 323.94 0.099 6.542 1.995 306.23 0.104 6.3315 2.021 289.61 0.11 6.1288 2.046 274.02 0.116...
  • Page 119 GREE DC INVERTER HEAT PUMP CONDENSING UNIT Temperature (℃) Resistance (kΩ) Voltage (V) Temperature (℃) Resistance (kΩ) Voltage (V) 41.313 0.643 1.9123 2.77 39.61 0.665 1.8652 2.781 37.958 0.688 1.8158 2.793 36.384 0.711 1.7698 2.804 34.883 0.735 1.7253 2.814 33.453 0.759...

  • Page 120: Temperature/Pressure List Of Refrigerant

    GREE DC INVERTER HEAT PUMP CONDENSING UNIT 2 Temperature/Pressure List of Refrigerant R410A Temperature Pressure Temperature Pressure Temperature Pressure ℃ ℃ ℃ 1880 1910 1960 2030 2080 2130 2180 2240 1020 2290 1050 2350 1090 2410 1110 2460 1150 2510...
  • Page 121 Thank you for choosing our product. Please read this Installation & Owner’s Manual carefully before operation and retain it for future reference. If you lose this Manual, please contact your local distributor or visit www.greecomcomfort.com/resources now to download and file the electronic version. U.S.

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