Gree RF28WPd/NaM Service Manual
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Gree RF28WPd/NaM Service Manual

Gree RF28WPd/NaM Service Manual

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Floor Standing Type Split Air Conditioner Units
www.breez.kz 1a Varlamov St. Almaty Tel.:+7 727 230 00 10

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Summary of Contents for Gree RF28WPd/NaM

  • Page 1 Floor Standing Type Split Air Conditioner Units www.breez.kz 1a Varlamov St. Almaty Tel.:+7 727 230 00 10...

  • Page 2: Table Of Contents

    CONTENTS PRODUCT ............................ 1 1 Product List ................................2 2 Nomenclature ................................2 3 Working principle ..............................2 4 Unit parameter ................................5 CONTROL ............................ 7 1 Cntrol and Display of Indoor unit ........................... 8 2 Monitoring Software .............................. 13 INSTALLATION ..........................
  • Page 3 TROUBLESHOOTING ....................... 84 1 Malfunction List ..............................85 2 Troubleshooting ..............................87 3 Attachment-Inquiry of General Parameters ....................... 124 4 Removal of Parts ..............................128 MAINTENANCE ........................149 1 Heat exchanger of ODU ............................150 2 Drain pipe ................................150 3 Air filter ..................................

  • Page 4: Product

    PRODUCT www.breez.kz 1a Varlamov St. Almaty Tel.:+7 727 230 00 10...

  • Page 5: Product List

    Floor Standing Type Split Air Conditioner Units GREE 1 Product List Power Capacity(kW) Appearance type Model Refrigeran Cooling Heating Outdoor Indoor Capacity Capacity RF28WPd/Na- 28.1 380-415V 3N~/50Hz LF28WPd/Na- R410A 400V RF28WPd/Na- 19.3 3N~/60Hz 2 Nomenclature Name Description R- Heat pump...
  • Page 6 Floor Standing Type Split Air Conditioner Units GREE through the connection pipe of IDU&ODU. In IDU, after throttling with electronic expansion valve, the refrigerant will be distributed to the U tube of evaporator through separator evenly, and returned to ODU from the gas connection pipe after summarizing.
  • Page 7 Floor Standing Type Split Air Conditioner Units GREE 3.2.2 Working principle diagram for cooling only type 3.2.3 Component name and main function Name Main function Through compression of the compressor, the volume of low pressure refrigerant will decrease,as the increase of pressure and temperature, it will become the refrigerant of high pressure and high Compressor temperature and driving force of the whole system.

  • Page 8: Unit Parameter

    Floor Standing Type Split Air Conditioner Units GREE Name Main function IDU fans Convection heat transfer between indoor heat exchanger and indoor air through fan motor Gas-liquid Separate gas and liquid for the refrigerant absorbed into the compressor to avoid wet operation of separator compressor.
  • Page 9 Floor Standing Type Split Air Conditioner Units GREE and 27℃（dry bulb）/19℃（wet bulb）at indoor side; ② Test working condition for T3 cooling capacity is 46℃（dry bulb）/24℃（wet bulb）at outdoor side and 29℃（dry bulb）/19℃（wet bulb） at indoor side; ③ Test working condition for heating capacity is 7℃（dry bulb）/6℃（wet bulb）at outdoor side and 20℃（dry bulb）/15℃（wet bulb）...

  • Page 10: Control

    Floor Standing Type Split Air Conditioner Units GREE CONTROL www.breez.kz 1a Varlamov St. Almaty Tel.:+7 727 230 00 10...

  • Page 11: Cntrol And Display Of Indoor Unit

    Floor Standing Type Split Air Conditioner Units GREE 1 Cntrol and Display of Indoor unit 1.1 Control Panel Note: “AIR” function is an optional function of indoor unit, for the unit without such function, this function is invalid;”AIR”,HEATER”, “ROOM”, “OFFICE”, “RESTAURANT”, “COMMON” are obligate functions of indoor unit that cannot be set.

  • Page 12: Temperature Setting

    Floor Standing Type Split Air Conditioner Units GREE 1.2.3 Setting of Light ON/OFF Function Light ON/OFF Function: can set the ON and OFF of light for display panel. (1) Under power-on or power-off status, press “Light” button to turn on and turn off the light of display panel.
  • Page 13 Floor Standing Type Split Air Conditioner Units GREE (3) Settings of Timer Function 1) Timer Function: under power-on status, the countdown of power-off time can be set. Under power-off status, the countdown of power-on time can be set. 2) Timer setting: press “FUNCTION” button to switch to timer function, when “...

  • Page 14: Speed Settings

    Floor Standing Type Split Air Conditioner Units GREE (5) Setting of energy-saving function 1) Energy-saving function: through setting the lower temperature limit of cooling and dry mode and upper temperature limit of heating mode, to make the air conditioner operate in a smaller temperature range, thus save energy.

  • Page 15: Special Functions

    Floor Standing Type Split Air Conditioner Units GREE 1.2.7 Special Functions (1) Inquire address of indoor unit Under power-off status, press “SPEED” button and “ON/OFF” button simultaneously for 5 seconds, then the “88” LED will display the engineering No. of the indoor unit for 5 seconds; if the engineering No. is over two digits, it will circularly display the higher two digits and lower two digits.

  • Page 16: Monitoring Software

    This will not only improve the productivity, but also reduce cost on human resources, property and management. Gree Commissioning Tool Kits can monitor and control the duct type split air conditioner inverter series. User can monitor and control units by monitoring the computer. This software is an efficient tool for the intelligent air conditioning management as well as installation and after-sales service and commissioning.

  • Page 17: Connection Of Computer And Units

    Seen from the diagram, Gree commissioing network is made up of 3 parts: The 1st part is the monitoring computer, including Gree debugger and Gree USB converter driver that are installed in the computer. The 2nd part is Gree USB converter, which is to convert the air conditioning communication into computing communication.
  • Page 18 Floor Standing Type Split Air Conditioner Units GREE 2.3.2.2 Appearance www.breez.kz 1a Varlamov St. Almaty Tel.:+7 727 230 00 10...

  • Page 19: Installation Notice

    CAN interface exhibits no polarity (A and B are equal). (8) HBS interface: When HBS converter is under HBS communication mode, connect air conditioner’s HBS data interface. HBS interface exhibits no polarity (This interface is not yet available for Gree debugger and the monitoring software).

  • Page 20: Software Introduction

    5.5 meters’ long. They are only different in length. One end of the wire shall connect with air conditioner’s communication interface and the other end shall connect with CAN interface of Gree USB converter. The wire can be connected to the communication interface of outdoor unit or the communication interface of indoor unit: 2.4 Software introduction...

  • Page 21: Data Monitoring

    Gree Commissioning Tool Kits is applicable to air conditioning system that comsists of multiple series and models. Later, it will be developed to cover all series of Gree central air conditioners, such as multi VRF, centrifugal chiller, screw type chiller, ground source heat pump units, modular units, fan coiled units, close control units, etc.
  • Page 22 Floor Standing Type Split Air Conditioner Units GREE (3) Select language. (4) Select system of units. www.breez.kz 1a Varlamov St. Almaty Tel.:+7 727 230 00 10...
  • Page 23 Floor Standing Type Split Air Conditioner Units GREE (5) If units you want to monitor are already connected, and able to communicate normally, with correct COM and protocal, then you may click “Connect” to enter the interface of numbers. Otherwise, connect in accordance with the connection diagram shown below.
  • Page 24 Floor Standing Type Split Air Conditioner Units GREE (6) COM selection: the serial port in your computer can be detected automatically. You just need to select your desired serial port. www.breez.kz 1a Varlamov St. Almaty Tel.:+7 727 230 00 10...
  • Page 25 Floor Standing Type Split Air Conditioner Units GREE (7) Protocal selection: This is to select the communication method of your units. Currently, CAN is applicable to the units. www.breez.kz 1a Varlamov St. Almaty Tel.:+7 727 230 00 10...
  • Page 26 Floor Standing Type Split Air Conditioner Units GREE (8) After the selection, click “Connnect”. If units can communicate normally with computer, then the interface of numbers will be shown soon. Otherwise, “Connecting” will be shown. www.breez.kz 1a Varlamov St. Almaty Tel.:+7 727 230 00 10...
  • Page 27 Floor Standing Type Split Air Conditioner Units GREE (9) There are several display zones on this interface. You can hide devices information and system information by clicking devices information icon and system icon . Display zones of indoor unit information and errors can be dragged up and down at the dividing lines. As to the display zone of outdoor...
  • Page 28 Floor Standing Type Split Air Conditioner Units GREE (10) On the display zone of devices information, you may click to select and view units that need monitoring. 2.4.3 Project debugging (1) Click icon of “Debug” on the menu bar and the interface will be switched to project debugging, where auto debugging will be started from up to down and from left to right.
  • Page 29 Floor Standing Type Split Air Conditioner Units GREE (2) Click “Start” to enable the debugging function. Then debugging will be started up automatically. indicates that debugging is in progress while indicates debugging is completed. www.breez.kz 1a Varlamov St. Almaty Tel.:+7 727 230 00 10...
  • Page 30 Floor Standing Type Split Air Conditioner Units GREE (3) If “OK” button is displayed, it means user needs to judge whether to continue debugging or not. Click icon and relevant information will be shown for your reference. Click “Close” to close the pop-up (For No.3 Confirm ODU Basic Module NO.
  • Page 31 Floor Standing Type Split Air Conditioner Units GREE (4) Icon indicates that there is problem found during debugging. Debugging will not be completed unless problem is solved (after problem is solved, step without “OK” button will switch to the next step automatically, otherwise user needs to click “OK”...
  • Page 32 Floor Standing Type Split Air Conditioner Units GREE www.breez.kz 1a Varlamov St. Almaty Tel.:+7 727 230 00 10...

  • Page 33: Control Units

    Floor Standing Type Split Air Conditioner Units GREE (6) Step 11, 13 and 14 are reserved steps. And step 13, 14, 15 and 16 are steps in parallel (only one of the four will be selected according to actual needs).
  • Page 34 Floor Standing Type Split Air Conditioner Units GREE (2) Take indoor unit as an example. Click “IDU Settings” and a dialog box will pop up. www.breez.kz 1a Varlamov St. Almaty Tel.:+7 727 230 00 10...
  • Page 35 Floor Standing Type Split Air Conditioner Units GREE (3) Tick the indoor units that need setting in the IDU selection zone or you may click “Select All” to select all of them or “Select Inverted” to select none of them. After selection, the current values of the corresponding parameters will be displayed in the zone of settings.

  • Page 36: Other Functions

    Floor Standing Type Split Air Conditioner Units GREE 2.4.5 Other functions (1) Capture screen Click icon of “Capture Screen” to print the interface. If you want to open the interface, click “Open”. (2) Search for database folder Click icon of “Open Data Folder” on the menu bar to open database folder.
  • Page 37 Floor Standing Type Split Air Conditioner Units GREE www.breez.kz 1a Varlamov St. Almaty Tel.:+7 727 230 00 10...
  • Page 38 Floor Standing Type Split Air Conditioner Units GREE (3) Conversion of pressure value Click icon of “Others” on the menu bar and then click “Display Settings” to select “High Low Pressure Value” and “Refrigerant Type”. Select “Temperature” and the pressure parameter displayed on the interface will be temperature.
  • Page 39 Floor Standing Type Split Air Conditioner Units GREE (4) Database saving of multiple systems Click icon of “Others” on the menu bar and click “Database Save Settings” to select which system that needs to save database. Because there is a large quantity of data in a network that contains multiple systems, data of only one system can be saved.
  • Page 40 Floor Standing Type Split Air Conditioner Units GREE www.breez.kz 1a Varlamov St. Almaty Tel.:+7 727 230 00 10...

  • Page 41: Installation

    Floor Standing Type Split Air Conditioner Units GREE INSTALLATION www.breez.kz 1a Varlamov St. Almaty Tel.:+7 727 230 00 10...

  • Page 42: Preparation Before Installation

    Floor Standing Type Split Air Conditioner Units GREE 1 Preparation before installation 1.1 Installation notice 1.1.1Safety requirement for project installation and construction Personnel and property safety are highly concerned during the entire installation process. Installation implementation must abide by relevant national safety regulations to ensure personnel and property safety.
  • Page 43 Floor Standing Type Split Air Conditioner Units GREE Installation Problem Possible Consequence The ratio of slop for condensate water pipe is insufficient or the Reverse slop or inconsistent direction of slop can hinder the smooth drainage and condensate water pipe is cause leakage of the IDU.
  • Page 44 Floor Standing Type Split Air Conditioner Units GREE (2) If the power cord and air switch meet air conditioning requirements or related national safety regulations; (3) If the quality of regional power supply (include electric wave and interference clutter) meet national standard.
  • Page 45 Floor Standing Type Split Air Conditioner Units GREE 1.2.2.3 Insulation material (1) Material: rubber and plastic foaming (2) Specification and requirement ① Flame retardancy level: B1 or higher; ② Refractoriness: at least 120℃; ③ The insulation thickness of condensate water pipe: at least 10 mm;...

  • Page 46: Installation Of Indoor Unit

    Floor Standing Type Split Air Conditioner Units GREE 2 Installation of Indoor Unit 2.1 Outline and installation dimension Unit: mm 2.2 Selection of installation location (1) Avoid direct sunshine. (2) Don’t install it in places with corrosive gas and severe dust, salt mist, lampblack, or wet locations.

  • Page 47: Installation Space Requirement

    Floor Standing Type Split Air Conditioner Units GREE (7) Ensure a horizontal surface for the ground. After installation, the inclination degree shall be ≤0.7º along with the length direction and ≤0.5º along with the width direction. 2.3 Installation space requirement 3 Installation of Outdoor Unit 3.1 Outline dimension and position of installation hole...
  • Page 48 Floor Standing Type Split Air Conditioner Units GREE 3.2 Installation location for ODU (1) ODU must be installed in stable and firm supporting panel of architecture. (2) ODU and IDU shall be close as much as possible, try to decrease the length of refrigerant pipe and quantity of bends.
  • Page 49 Floor Standing Type Split Air Conditioner Units GREE 3.4 Installation base of ODU Concrete base in the installation location of ODU shall have enough strength; meanwhile, drainage shall be smooth and not affect drainage on the ground or in downstair.

  • Page 50: Pipeline Design Of Refrigerant

    Floor Standing Type Split Air Conditioner Units GREE 4 Pipeline design of refrigerant 4.1 Notices for pipeline design Pipeline length and vertical fall shall within the required range, and the pipeline length and fall shall be as short as possible; when vertical fall of pipeline is too big, please set oil return loop as required;...

  • Page 51: Pipeline Installation And Heat Preservation

    Floor Standing Type Split Air Conditioner Units GREE (3) Manufacture size of oil loop is as follows： A(mm) B(mm) C(mm) ≥34 ≤105 ≥34 ≤150 ≥45 ≤150 ≥60 ≤250 ≥80 ≤450 5 Pipeline installation and heat preservation 5.1 Pipeline installation of refrigeration system 5.1.1 Processing of refrigerant piping...
  • Page 52 Floor Standing Type Split Air Conditioner Units GREE (2) During operation, step up and rotate the pipe cutter slowly, cut the copper pipe if it is not deformed. In case the pipe end is deformed obviously, please cut it off and throw it away to conduct re-processing.
  • Page 53 Floor Standing Type Split Air Conditioner Units GREE (9) Blow wash——suitable for coil (10) Blow the dust and impurities inside the pipe with nitrogen. Warning! After cleaning, remember to seld the pipe end of copper pipe with seal cap or tape in time.

  • Page 54: Installation Of Refrigerant Piping

    Floor Standing Type Split Air Conditioner Units GREE 5.1.1.4 Processing of flaring The other pipeline connection method is to connect with bellmouth. Before connecting with bellmouth, expand the mouth of the pipeline for processing. (1) Cover the nut of flaring on the copper pipe;...
  • Page 55 Floor Standing Type Split Air Conditioner Units GREE heat preservation layer and the gradient of condensate water pipe. Fill the gap between the pipe and the sleeve with flexible and non-flammable materials. The sleeve cannot be used as a support point of the pipe.

  • Page 56: Connection Of Pipeline

    Floor Standing Type Split Air Conditioner Units GREE (3) Protective sleeve shall be set on the wall which the pipeline passes through or on the floor slab, the length of through-wall sleeve shall be the same with the wall, and align the sleeve of floor slab with the bottom of floor slab, the top surface shall be over 20mm, when it is placed in wash room, it shall be 50mm higher than the floor;...
  • Page 57 Floor Standing Type Split Air Conditioner Units GREE Leave the pipe disconnected from the indoor unit temporarily. Indoor unit Indoor unit Gas pipe Nitrogen Liquid pipe Perform an air-tightness test and a vacuum test to the entire refrigerant pipe system after the construction is finished.
  • Page 58 Floor Standing Type Split Air Conditioner Units GREE If the vacuum degree of -0.1 MPa cannot be reached, repeat this operation till water is discharged. ⑤ After vacuumization, turn off the regulator valve and keep for 30min. Ensure that the pressure of the regulator valve does not increase.
  • Page 59 Floor Standing Type Split Air Conditioner Units GREE check whether drainage is smooth and whether water leakage exists in the pipe system. (6) Equip a steel casing for all pipes which are led through the wall or floor. Pipe bonding joints cannot be placed inside the sleeve.
  • Page 60 Floor Standing Type Split Air Conditioner Units GREE 5.3 Heat preservation measure Select heat insulation material according to the following table Thickness（mm） Type Insulation material Thermal and humid General environment environment Φ6.35～15.9 Rubber and plastic Copper pipe heat preservation pipe ≥19.05...
  • Page 61 Floor Standing Type Split Air Conditioner Units GREE (3) Glue must be smeared in the connection joint of heat preservation for connection; the connector shall be flush and flat without gaps. It’s forbidden to glue the heat preservation pipe in both ends for connection after stretching.

  • Page 62: Electric Installation

    Floor Standing Type Split Air Conditioner Units GREE completely sealed with glue. (5) Heat preservation of 3-way valve has no gap, the glue shall be tight. 6 Electric installation (1) The air conditioning unit is category I electrical appliance which requires reliable grounding.
  • Page 63 Floor Standing Type Split Air Conditioner Units GREE (6) After wiring, cover the electrical box and take dustproof and water proof actions. 6.1.2 Power cable diameter and air switch selection Circuit Number of ground Number of power wire × Min...

  • Page 64: Wiring Diagram

    Floor Standing Type Split Air Conditioner Units GREE 6.1.3 Wiring diagram Notes： ① For the specification of power cord, please refer to the wiring requirements in “Requirements for Connecting Electricity”. ② Take two wires of 0.75mm as the communication cable between indoor unit and outdoor unit. Max wire length is 50m.

  • Page 65: Circuit Diagram

    Floor Standing Type Split Air Conditioner Units GREE 6.2 Circuit diagram Concrete circuit diagram shall refer to the one pasted on the unit. 6.2.1 Circuit diagram of IDU RF28WPd/Na-M(I)、LF28WPd/Na-M(I)、RF28WPd/Na-H(I)： www.breez.kz 1a Varlamov St. Almaty Tel.:+7 727 230 00 10...
  • Page 66 Floor Standing Type Split Air Conditioner Units GREE 6.2.2 Circuit diagram of ODU RF28WPd/Na-M(O)： LF28WPd/Na-M(O)： www.breez.kz 1a Varlamov St. Almaty Tel.:+7 727 230 00 10...
  • Page 67 Floor Standing Type Split Air Conditioner Units GREE RF28WPd/Na-H(O)： www.breez.kz 1a Varlamov St. Almaty Tel.:+7 727 230 00 10...

  • Page 68: Installation Acceptance

    Floor Standing Type Split Air Conditioner Units GREE 7 Installation acceptance Inspection items after installation： Situation might happen if installed Inspection items Inspection record improperly The unit might fall down, vibrate or make Is installation of each part firm? noise...

  • Page 69: Debugging & Maintenance

    Floor Standing Type Split Air Conditioner Units GREE DEBUGGING & MAINTENANCE www.breez.kz 1a Varlamov St. Almaty Tel.:+7 727 230 00 10...

  • Page 70: Debugging Flow Chart

    Floor Standing Type Split Air Conditioner Units GREE 1 Debugging flow chart Prepare the project before debugging Install the effect check Check the unit Debugging 2 Safety notice Warning! Take safety measure for outdoor operation. All the participated debugging and maintenance personnel must learn of the safty regulation on architecture construction, and follow the instruction strictly;...

  • Page 71: Preparation Before Debugging

    Floor Standing Type Split Air Conditioner Units GREE 3 Preparation before debugging 3.1 Preparation for debugging tool Inner hexagon spanner Digital thermometer Shifting spanner Noise meter Cross screwdriver Clamp meter Straight screwdriver Digital multimeter Vacuum pump Electricity meter Electronic balance...
  • Page 72 Floor Standing Type Split Air Conditioner Units GREE Debugging data record： Project name： Debugging person： Unit model： Date： Max fall of IDU and Total length of refrigerant Additional charge quantity ODU（m） ： pipeline（m） of refrigerant (kg) □Cooling □Heating Debugging status：...
  • Page 73 Floor Standing Type Split Air Conditioner Units GREE 3.3 Inspection before debugging Notice! Please record those installations which are inconsistent with the specification in time, so as to provide corresponding analysis basis while testing the refrigeration system. Inspection record before debugging...
  • Page 74 Floor Standing Type Split Air Conditioner Units GREE Inspection record before debugging Pass or Type Inspection items Reference value Examiner If yes, please leakage detecting with soap or leak detector immediately to confirm the condition. After Leakage in valve? confirming, please stop the...

  • Page 75: Debugging Of Unit

    Floor Standing Type Split Air Conditioner Units GREE Inspection record before debugging Pass or Type Inspection items Reference value Examiner Is the communication connection between IDU and wired controller correct? Communication cord and power cord shall not be laied in the same trunking, lay...
  • Page 76 Floor Standing Type Split Air Conditioner Units GREE add refrigerant during run test operation process. Please refer to below run test for the refrigerant-adding stage during run test process. (7) After adding refrigerant, please make sure the valve for outdoor is opened completely.
  • Page 77 Floor Standing Type Split Air Conditioner Units GREE ④ The main control function DIP switch “SA6” is used to set master module and subsidiary module, the defaulted factory setting is the main module. As the fig is shown, dialing to “ON” side represents “0” and dialing to the figure side represents “1”, the defaulted setting for the unit is “00”.
  • Page 78 Floor Standing Type Split Air Conditioner Units GREE 4.2.2 Flow-process diagram of debugging 01:Set master unit 02:Allocate addresses 03:Confirm the quantity of ODU 04:Confirm the quantity of IDU 05:Detect ODU’s internal communication 06:Detect outdoor components 07:Detect indoor components 08:Confirm preheated compressor...
  • Page 79 Floor Standing Type Split Air Conditioner Units GREE 4.2.3 Basic operation of project debugging (1) Start project debugging Press “SW3” button consecutively in the master module for over 5s to enter auto debugging. (2) Exit project debugging After entering project debugging, press “SW3” button consecutively in the master module for over 5s to exit the debugging.
  • Page 80 Floor Standing Type Split Air Conditioner Units GREE Description of each stage of debugging progress —— Debugging Code Instruction for Code and Operating Method Progress Display Display Code Code It will automatically enter into the next step’s operation after displaying for repeatedly once.
  • Page 81 Floor Standing Type Split Air Conditioner Units GREE Description of each stage of debugging progress —— Debugging Code Instruction for Code and Operating Method Progress Display Display Code Code Display No component of IDU is found in the system, 07/oC repeatedly It will automatically enter into the next step 5 seconds later.
  • Page 82 Floor Standing Type Split Air Conditioner Units GREE Description of each stage of debugging progress —— Debugging code Instruction for Code and Operating Method Progress Display Display code status The system has no master unit. Display Debugging can’t be continued, all buttons are invalid, disconnect the...
  • Page 83 Floor Standing Type Split Air Conditioner Units GREE Description of each stage of debugging progress —— Debugging code Instruction for Code and Operating Method Progress Display Display code status Communication between the master control of outdoor unit and drive is Display normal.

  • Page 84: Function Setting

    Floor Standing Type Split Air Conditioner Units GREE 5 Function setting 5.1 Function setting of outdoor unit After debugging, long press “SW1” button in master control for 5s, the system will enter function standby status, main board indicator of outdoor unit is displayed acquiescently as follows:...
  • Page 85 Floor Standing Type Split Air Conditioner Units GREE 5.1.2 Unit cooling and heating function setting This function can conduct compulsory setting to unit operation mode, after entering function setting (A6), main board indicator of outdoor unit is displayed as follows:...

  • Page 86: Reset Factory Setting

    Floor Standing Type Split Air Conditioner Units GREE 5.1.5 Reset factory setting (1) Reset defaulted factory setting 1 (clear all settings): Long press “SW1 + SW4” button for over 10s in the main module, the nixie tube will display “oC” for 3s, the main board will remove all settings, including IP address of indoor and outdoor unit.

  • Page 87: Troubleshooting

    Floor Standing Type Split Air Conditioner Units GREE TROUBLESHOOTING www.breez.kz 1a Varlamov St. Almaty Tel.:+7 727 230 00 10...

  • Page 88: Malfunction List

    Floor Standing Type Split Air Conditioner Units GREE 1 Malfunction List Malfunction list for the IDU Display Display Display Content Content Content code code code Wrong number of indoor Malfunction of indoor unit for one-to-more indoor Malfunction of jumper cap...
  • Page 89 Floor Standing Type Split Air Conditioner Units GREE Display Display Display Content Content Content code code code Malfunction of outdoor Malfunction for temperature Maflunction of defrosting ambient temperature sensor of inlet tube of gas temperature sensor 1 sensor and liquid separator...

  • Page 90: Troubleshooting

    Floor Standing Type Split Air Conditioner Units GREE Display Display Display Content Content Content code code code shock of indoor unit Emergency status of Emergency status of fan Energycy status of module compressor No malfunction of main Malfunction of main...
  • Page 91 Floor Standing Type Split Air Conditioner Units GREE Applicable model: all heat pump models Judgment condition and method for the fault： It is a status code, which means the system has entered defrosting status, the indoor fan will suspend for 5-10min.
  • Page 92 Floor Standing Type Split Air Conditioner Units GREE “A7” quiet mode setting Fault display: the main board of outdoor unit will display Applicable model: all models Judgment condition and method for the fault： It is a status code, which means the system has entered quiet mode setting status.
  • Page 93 Floor Standing Type Split Air Conditioner Units GREE It is a status code, which means the system has entered fan blow mode, at this time, the indoor unit can only operate in fan blow mode. Possible reason：—— Troubleshooting：—— (9) “AJ” cleaning alarm for filter...
  • Page 94 Floor Standing Type Split Air Conditioner Units GREE Troubleshooting：—— (12) “Ad” limit operation Fault display: the main board of outdoor unit and indoor unit will display Applicable model: all models Judgment condition and method for the fault： It is a status code, which means emergency operation status is set, however, emergency operation time has exceeded the limit requirement, at this time, the unit is not allowed to conduct emergency operation.
  • Page 95 Floor Standing Type Split Air Conditioner Units GREE “b1”outdoor ambient temperature sensor error Is the terminal between mainboard and If it is loosened or there are foreign ambient temperature sensor loose objects, retighten it after treatment. or any foreign objects inside...
  • Page 96 Floor Standing Type Split Air Conditioner Units GREE “b2”Defrosting temperature sensor 1 error Is the If it is loosened or there terminal between mainboard are foreign objects, and ambient temperature sensor retighten it after loose or any foreign objects treatment.
  • Page 97 Floor Standing Type Split Air Conditioner Units GREE “b9”heat exchanger outlet temperature sensor error Is the terminal between If it is loosened or there are mainboard and ambient foreign objects, retighten it temperature sensor loose or any after treatment. foreign objects inside the terminal?
  • Page 98 Floor Standing Type Split Air Conditioner Units GREE compressor's drive board. If the fault is solved, the compressor's drive board is faulty. (17) “C6” alarming due to wrong quantity of outdoor unit Fault display: the main board of outdoor unit and indoor unit will display Applicable model: all outdoor units Judgment condition and method for the fault：...
  • Page 99 Floor Standing Type Split Air Conditioner Units GREE Check if the reading of address chip and memory chip of IDU mainboard is normal. If the data of address chip and memory chip cannot be read, it is abnormal Possible reason：...
  • Page 100 Floor Standing Type Split Air Conditioner Units GREE Applicable mode: all indoor units Error judgment condition and method: Sample the AD value of temperature sensor through temperature sensor detecting circuit and judge the range of AD value. If the sampling AD value exceeds upper limit and lower limit in 5 seconds continuously, report the error Possible reason：...
  • Page 101 Floor Standing Type Split Air Conditioner Units GREE ■Outlet pipe temperature sensor is abnormal ■Detecting circuit is abnormal (24) “d9” Jumper cap error Error display: IDU displays Error judgment condition and method: Possible reason： If jumper cap model doesn’t match with mainboard, report the error ■Jumper cap is not installed...
  • Page 102 Floor Standing Type Split Air Conditioner Units GREE Error display: ODU mainboard, IDU displays Applicable model: all models Error judgment condition and method： Judge through detecting the real-time high pressure or the high pressure switch. If the sensor detects that the high pressure value is over 65℃ or the high pressure switch is disconnected, then it is judged as high pressure, the system will stop the unit for protection.
  • Page 103 Floor Standing Type Split Air Conditioner Units GREE E1 system high pressure protection Is the system Test if the high high pressure connecting Replace the main board to the pressure gage pressure switch is of ODU over 4.2MPa? normal Replace the high...
  • Page 104 Floor Standing Type Split Air Conditioner Units GREE (28) “E3” system low pressure protection Error display: ODU mainboard, IDU displays Applicable model: all models Error judgment condition and method： Detect the suction pressure of compressor through pressure sensor of low pressur, when the pressure value is below -41℃, the system will stop operation.
  • Page 105 Floor Standing Type Split Air Conditioner Units GREE E3 system low pressure protection Does the low pressure reach the Low pressure sensor error, protection value? Test with replace the pressure sensor. pressure gauge. Is system refrigerant Add refrigerant according to design, quantity too little? pipeline and refrigerant requirement.
  • Page 106 Floor Standing Type Split Air Conditioner Units GREE (29) “E4” discharge high temperature protection for compressor Error display: the main board of outdoor unit and indoor unit will display Applicable model: all models Error judgment condition and method： Detect compressor discharge temperature through compressor exhaust pipe and the temperature sensor of shell, if the detection value is over 118℃, the system will stop the...
  • Page 107 Floor Standing Type Split Air Conditioner Units GREE “F0” poor main board of outdoor unit (30) Error display: the main board of outdoor unit and indoor unit will display Applicable model: all outdoor units Error judgment condition and method： Check the reading of address chip, memory chip and clock chip of ODU main board is normal, if not, it can be judged as abnormal.
  • Page 108 Floor Standing Type Split Air Conditioner Units GREE “F5” discharge temperature sensor error of compressor 1 Check the wiring terminal of the main board and temperature Re-insert it after proper sensor to see if it’s loose or are there treatment...
  • Page 109 Floor Standing Type Split Air Conditioner Units GREE “J7” 4-way valve protection Check if the connection of 4-way valve coil and Connect it correctly and firmly main board is correct and firm? Is the voltage of main board output side normal? (Output voltage of the 4-way...
  • Page 110 Floor Standing Type Split Air Conditioner Units GREE ■IDU mainboard is abnormal (34) “L5” freeze protection Error display: wired controller of IDU and the dash receiver of IDU will display Error judgment condition and method: Check IDU pipe temperature. When pipe temperature is too low, freeze protection will be activated to prevent freezing damage of evaporator.
  • Page 111 Floor Standing Type Split Air Conditioner Units GREE Troubleshooting：—— (37) “n6” malfunction inquiry Error display: the main board of outdoor unit and indoor unit will display Applicable model: all models Error judgment condition and method： It is a status inquiry code, which means the system has entered malfunction inquiry status.
  • Page 112 Floor Standing Type Split Air Conditioner Units GREE Error display: the main board of ODU will display Applicable model: all models Error judgment condition and method： It is a status inquiry code, at this time, the quantity of online IDU can be inquired.
  • Page 113 Floor Standing Type Split Air Conditioner Units GREE Possible cause: —— Troubleshooting: —— (44) “nF” fan model Error display: ODU mainboard displays Applicable model: all models Condition and method for fault judgement: The code represents fan status, which prompts that the system has been set as fan status, the IDU can only conduct fan mode operation.

  • Page 114: Troubleshooting

    Floor Standing Type Split Air Conditioner Units GREE ODU. (46) “P2” power voltage protection for the driven board of compressor Error display: IDU wired controller displays Applicable model: all models Condition and method for fault judgement: View the error code via IDU wired controller, if the IDU wired controller displays P2, then view the display of dual-8 nixie tube of main control board of ODU.
  • Page 115 Floor Standing Type Split Air Conditioner Units GREE “P3” reset protection for the driven module of compressor Try to cut off the power for 3 times, and then re- energize the unit Replace the compressor Compressor driven board is driven board faulted (48) “P5”...
  • Page 116 Floor Standing Type Split Air Conditioner Units GREE “P5” overcurent protection for inverter compressor Check if the UVW wires are well connected? Check if the resistance value between different windings of compressor are normal (the normal value is less than 2 ohm)?If resistances of two windings are the same;...
  • Page 117 Floor Standing Type Split Air Conditioner Units GREE tube displays P6, it means driven IPM module protection for compressor. Possible causes: ■Poor contact of compressor UVW wires; ■Incorrect connecting order of compressor UVW wires; ■Compresso is damaged; ■The system is blocked;...
  • Page 118 Floor Standing Type Split Air Conditioner Units GREE ■Screws for IPM module has not been firmly fixed. ■No radiating paste in the IPM module, uneven application of radiating paste or the radiating paste is dry; ■The driven board od compressor is faulted.
  • Page 119 Floor Standing Type Split Air Conditioner Units GREE “P9” desynchronizing protection for inverter compressor Check if the UVW wires of compressor are well connected? Check if the connecting order of UVW wires of compressor is correct? Check if the resistance value between different...
  • Page 120 Floor Standing Type Split Air Conditioner Units GREE tube displays PC, it means circuit malfunction of driven current detection for compressor. Possible cause: ■Driven board of compressor is faulted; Troubleshooting: “PC” circuit malfunction of driven current detection for compressor Try to cut off the...
  • Page 121 Floor Standing Type Split Air Conditioner Units GREE “PH” high voltage protection for driven DC bus bar of compressor Check if the voltage of input Adjust the voltage as power cord is over 460V? 380~415V Driven board of Replace the driven board of...
  • Page 122 Floor Standing Type Split Air Conditioner Units GREE Error display:ODU mainboard displays Applicable model: all models Condition and method for fault judgement: View the error code displayed in dual-8 nixie tube of main control board of ODU, if the nixie tube displays PJ, it means failure startup for inverter compressor.
  • Page 123 Floor Standing Type Split Air Conditioner Units GREE “PJ” failure startup for inverter compressor Check if the UVW wires of compressor are well connected? Check if the connecting order of UVW wires of compressor is correct? Check if the resistance...
  • Page 124 Floor Standing Type Split Air Conditioner Units GREE Possible cause: —— Troubleshooting: Preheat the unit for over 8 hours before startup. (58) “U2” wrong setting of capacity dial code/jumper cap of outdoor unit Error display: ODU mainboard and IDU display...

  • Page 125: Possible Cause

    Floor Standing Type Split Air Conditioner Units GREE the cut-off valve again, after it is checked, press SW5 to enter to the next step. Possible cause: ■Cut-off vale of ODU is not opened; Troubleshooting: Recheck and open the cut-off valve of ODU.
  • Page 126 Floor Standing Type Split Air Conditioner Units GREE Poor cooling/heating effect Check if the cut-off valve Open the cut-off valve to the of ODU has been opened to the greatest flow position greatest flow position? Along the flow direction of...

  • Page 127: Attachment-Inquiry Of General Parameters

    Floor Standing Type Split Air Conditioner Units GREE 3 Attachment-Inquiry of General Parameters 3.1 Corresponding Saturation Temperature for Pressure of R410A Refrigerant Temperature Corresponding saturation Temperature Corresponding saturation Temperature Corresponding saturation (℃) pressure (BAR) (℃) pressure (BAR) (℃) pressure (BAR) 1.54...
  • Page 128 Floor Standing Type Split Air Conditioner Units GREE 3.2 Corresponding Table for Resistance and Temperatur of Temperature Sensor 3.2.1 Corresponding table for 15kΩ resistance of ambient temperature sensor and temperature Resistance (kΩ) Resistance (kΩ) Resistance (kΩ) Temperature (° C) Temperature (° C) Temperature (°...
  • Page 129 Floor Standing Type Split Air Conditioner Units GREE 3.2.2 Corresponding table for 20kΩ resistance of tube temperature sensor and temperature Resistance (kΩ) Resistance (kΩ) Resistance (kΩ) Temperature (° C) Temperature (° C) Temperature (° C) 361.8 39.87 7.173 339.8 38.01 6.905...
  • Page 130 Floor Standing Type Split Air Conditioner Units GREE Resistance (kΩ) Resistance (kΩ) Resistance (kΩ) Temperature (° C) Temperature (° C) Temperature (° C) 46.11 8.051 1.996 43.92 7.745 1.934 41.84 7.453 1.875 3.2.3 Corresponding table for 50kΩ resistance of air discharge temperature sensor and temperature Note: including compressor top temperature sensor and air discharge tube temperature sensor.

  • Page 131: Removal Of Parts

    Floor Standing Type Split Air Conditioner Units GREE Temperatur Resistance Temperature Resistance Temperatur Resistance Temperatur Resistance (kΩ) (kΩ) (kΩ) (kΩ) e (° C) (° C) e (° C) e (° C) 25.11 5.93 1.87 24.13 5.75 1.82 23.19 5.56 1.77 22.29...
  • Page 132 Floor Standing Type Split Air Conditioner Units GREE Photo Name Function 4-way valve It changes the flow direction of refrigerant for switching between cooling and heating. It stays between discharge outlet of compressor and inlet of condenser. It used for...

  • Page 133: Disassembly Of Outdoor Unit

    Floor Standing Type Split Air Conditioner Units GREE 4.2 Disassembly of key components 4.2.1 Disassembly of outdoor unit Removal operation for panel Remark: Before removing the panel, please make sure that the unit is disconected with the power Process Photo Operation Instruction ●...
  • Page 134 Floor Standing Type Split Air Conditioner Units GREE Removal operation for panel Remark: Before removing the panel, please make sure that the unit is disconected with the power Process Photo Operation Instruction ● Loose screws fixing left side plate 4)Remove...
  • Page 135 Floor Standing Type Split Air Conditioner Units GREE Removal operation for blade Remark: Before removing the motor, please make sure that the unit is disconnected with the power. Process Photo Operation Instruction Loose screws fixing the motor with screwdriver ● then remove the power cord of...
  • Page 136 Floor Standing Type Split Air Conditioner Units GREE Removal operation of compressor Applicable to RF28WPd/Na-M(O)、LF28WPd/Na-M(O) Remark: Before removing the compressor, please make sure that there’s no refrigerant inside the pipeline and the power is disconnected. Process Photo Operation Instruction ●Loose...
  • Page 137 Floor Standing Type Split Air Conditioner Units GREE Removal operation of compressor Applicable to RF28WPd/Na-M(O)、LF28WPd/Na-M(O) Remark: Before removing the compressor, please make sure that there’s no refrigerant inside the pipeline and the power is disconnected. ● Take out the compressor and...
  • Page 138 Floor Standing Type Split Air Conditioner Units GREE Removal operation of compressor Applicable to RF28WPd/Na-M(O)、LF28WPd/Na-M(O) Remark: Before removing the compressor, please make sure that there’s no refrigerant inside the pipeline and the power is disconnected. ● Loose screws fixing the power cord with screwdriver ●...
  • Page 139 Floor Standing Type Split Air Conditioner Units GREE Removal operation of compressor Applicable to RF28WPd/Na-H (O). Remark: Before removing the compressor, please make sure that there’s no refrigerant inside the pipeline of system and the power is disconnected. Process Photo Operation Instruction ●First unscrew the fixing screws...
  • Page 140 Floor Standing Type Split Air Conditioner Units GREE Removal operation of compressor Applicable to RF28WPd/Na-H (O). Remark: Before removing the compressor, please make sure that there’s no refrigerant inside the pipeline of system and the power is disconnected. 3 Unscrew the ●Use spanner to unscrew the nuts...
  • Page 141 Floor Standing Type Split Air Conditioner Units GREE Removal operation of compressor Applicable to RF28WPd/Na-H (O). Remark: Before removing the compressor, please make sure that there’s no refrigerant inside the pipeline of system and the power is disconnected. ● After replacing the compressor,...
  • Page 142 Floor Standing Type Split Air Conditioner Units GREE Removal operation of compressor Applicable to RF28WPd/Na-H (O). Remark: Before removing the compressor, please make sure that there’s no refrigerant inside the pipeline of system and the power is disconnected. ●First use screwdriver to screw up the screw of power cord.
  • Page 143 Floor Standing Type Split Air Conditioner Units GREE Removal operation for 4-way valve Applicable to RF28WPd/Na-M(O)、LF28WPd/Na-M(O)。 Remark: Before removing the 4-way valve, please make sure that there’s no refrigerant inside the pipeline of system and then power is disconnected. Process...
  • Page 144 Floor Standing Type Split Air Conditioner Units GREE Removal operation for 4-way valve Applicable to RF28WPd/Na-M(O)、LF28WPd/Na-M(O)。 Remark: Before removing the 4-way valve, please make sure that there’s no refrigerant inside the pipeline of system and then power is disconnected. Process...
  • Page 145 Floor Standing Type Split Air Conditioner Units GREE Removal operation for 4-way valve Applicable to RF28WPd/Na-H (O). Remark: Before removing the 4-way valve, please make sure that there’s no refrigerant inside the pipeline of system and then power is disconnected.
  • Page 146 Floor Standing Type Split Air Conditioner Units GREE Removal operation for 4-way valve Applicable to RF28WPd/Na-H (O). Remark: Before removing the 4-way valve, please make sure that there’s no refrigerant inside the pipeline of system and then power is disconnected.
  • Page 147 Floor Standing Type Split Air Conditioner Units GREE Removal operation for gas-liquid separator Applicable to RF28WPd/Na-M (O), LF28WPd/Na-M (O). Remark: Before removing the gas-liquid separator, please make sure that there’s no refrigerant inside the pipeline of system and then power is disconnected.
  • Page 148 Floor Standing Type Split Air Conditioner Units GREE Removal operation for gas-liquid separator Applicable to RF28WPd/Na-M (O), LF28WPd/Na-M (O). Remark: Before removing the gas-liquid separator, please make sure that there’s no refrigerant inside the pipeline of system and then power is disconnected.
  • Page 149 Floor Standing Type Split Air Conditioner Units GREE Removal operation for gas-liquid separator Applicable to RF28WPd/Na-H(O). Remark: Before removing the gas-liquid separator, please make sure that there’s no refrigerant inside the pipeline of system and then power is disconnected. Process...
  • Page 150 Floor Standing Type Split Air Conditioner Units GREE Removal operation for gas-liquid separator Applicable to RF28WPd/Na-H(O). Remark: Before removing the gas-liquid separator, please make sure that there’s no refrigerant inside the pipeline of system and then power is disconnected. ●Weld the connection pipe for...
  • Page 151 Floor Standing Type Split Air Conditioner Units GREE Manual operation 4Take out the fan Note: prevent sudden exertion blade during operation to avoid injury. 5Remove motor, and take Use screwdriver or other related out the fixing nuts, tools etc. Note: before removing the motor,...

  • Page 152: Maintenance

    Floor Standing Type Split Air Conditioner Units GREE MAINTENANCE www.breez.kz 1a Varlamov St. Almaty Tel.:+7 727 230 00 10...

  • Page 153: Heat Exchanger Of Odu

    (66) If the unit is shut down for a long time and should be restarted, the power switch of air conditioner should be turned on for 8 hours before operation, so as to preheat the crankcase of compressor; (67) Check if the outdoor unit is firmly installed, if not, please contact Gree specialized maintenance center. 5 Notices after operation (unserviceable season) (68) Cut off power supply of air conditioner;...

  • Page 154: Replacement Of Components

    (71) If the ODU is rusty, the rust position should be painted with oil paint to prevent it from enlarging. 6 Replacement of components Fittings can be acquired from the nearby Gree office or Gree dealers. Caution: When conducting gas proofness test or leakage test, it is not allowed to mix oxygen, ethyne or other dangerous gas into the refrigerant circuit! It is better to use nitrogen or refrigerant to conduct the test to ensure safety.

  • Page 155: Exploded View Of Unit And Parts' List

    Floor Standing Type Split Air Conditioner Units GREE 7 Exploded View of Unit and Parts’ List 7.1 Exploed view for outdoor unit and parts’ list 7.1.1 Model: RF28WPd/Na-M(O) Exploded view： www.breez.kz 1a Varlamov St. Almaty Tel.:+7 727 230 00 10...
  • Page 156 Floor Standing Type Split Air Conditioner Units GREE List of parts and components: Material name Material code Front Grill 01572800003 Diversion Circle 10474100003 Cabinet 01514100016P Left Side Plate 01314100090P Handle 26235253 Front Side Plate 01314100091P Axial Flow Fan 10434100008 Compressor and Fittings...
  • Page 157 Floor Standing Type Split Air Conditioner Units GREE 7.1.2 Model: LF28WPd/Na-M(O) Exploded view： List of parts and components: Material name Material code Left Side Plate 01314100090P Front Grill 01572800003 Diversion Circle 10474100003 Cabinet 01514100016P Handle 26235253 Front Side Plate 01314100091P...
  • Page 158 Floor Standing Type Split Air Conditioner Units GREE Material name Material code Brushless DC Motor 1570410001001 Chassis Sub-assy 017000000062P Mounting Plate Sub-Assy 01324100103P Cut off Valve 07334100011 Strainer 07414100026 Cut off Valve 07334100012 Compressor Gasket 76814100017 Electrical Heater(Compressor) 7651521212 Compressor and Fittings...
  • Page 159 Floor Standing Type Split Air Conditioner Units GREE 7.1.3 Model: RF28WPd/Na-H(O) Exploded view： List of parts and components: Material name Material code Front Grill 01572800003 Diversion Circle 10474100003 Cabinet 01514100016P Front Side Plate 01314100091P Handle 26235253 Axial Flow Fan 10434100008...
  • Page 160 Floor Standing Type Split Air Conditioner Units GREE Material name Material code Chassis Sub-assy 01194100081P Oil Separator 07424100050 Cut off Valve 07130208 Cut off Valve 07334100013 Low Pressure Survey Valve Sub-assy 030090000006 Compressor and Fittings 00204100015 Cut off Valve 07334100014...
  • Page 161 Floor Standing Type Split Air Conditioner Units GREE 7.2 Exploded view of IDU and list of parts and components Exploded view： List of parts and components: Material name Material code Air intake Panel 01534805 Display Board 30296000044 Filter Sub-Assy 11723201...
  • Page 162 Floor Standing Type Split Air Conditioner Units GREE Material name Material code Centrifugal Fan 10314401 R(L)F28WPd/Na-M(I): 1501442409 Fan Motor RF28WPd/Na-H(I): 1501442410 Decorative Cover 26114802 Electronic Expansion Valve 43044100190 Bidirection Strainer 07220016 Drainage Pipe Sub-assy 05238201 Decorative Rim Sub-Assy 26114800 Electric Expand Valve Fitting...
  • Page 163 JF00303871 www.breez.kz 1a Varlamov St. Almaty Tel.:+7 727 230 00 10...

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