Gree Ultra Heat GMV Multi VRF Heat Recovery Series Service Manual
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Gree Ultra Heat GMV Multi VRF Heat Recovery Series Service Manual

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Ultra Heat GMV Multi VRF
——Heat Recovery Series
TECHNICAL SERVICE MANUAL (R410A)

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Summary of Contents for Gree Ultra Heat GMV Multi VRF Heat Recovery Series

  • Page 1 Ultra Heat GMV Multi VRF ——Heat Recovery Series TECHNICAL SERVICE MANUAL (R410A)
  • Page 2 Installation, Commissioning, and Maintenance Manual for Ultra Heat GMV Multi VRF Units For North America Refrigeration Research Department July, 2016 Gree Electric Appliances, Inc. of Zhuhai...

  • Page 3: Table Of Contents

    CONTENTS PREFACE .................................. 1 SAFTY PRECAUTIONS ............................1 CHAPTER 1 INTRODUCTION TO BASIC FEATURES OF UNITS ..............7 1 BASIC OPERATING PRINCIPLE ....................... 7 2 INTERNAL PIPING DESIGN OF THE UNITS ..................8 3 BASIC PARAMETERS OF UNIT ......................12 4 ELECTRICAL PARAMETERS ........................
  • Page 4 2 METHOD FOR PERFUSING REFRIGERANT ..................81 CHAPTER 3 COMMISSIONING OPERATION ....................86 PART 1 SECURITY REQUIREMENTS ....................... 86 1 PRECAUTIONS FOR CONSTRUCTION ....................86 2 PRECAUTIONS FOR THE USE OF REFRIGERANTS ................ 86 3 FUNCTION SETTINGS OF ODUS ......................86 PART 2 COMMISSIONING PROCESS ......................

  • Page 5: Preface

    Ultra Heat GMV VRF Technical Service Manua_Heat Recovery Serial PREFACE AND SAFTY PRECAUTIONS PREFACE This manual specifies safe operation requirements for Ultra Heat GMV VRF units from perspectives of engineering and installation, commissioning and maintenance, as well as basic principles and implementation methods.
  • Page 6 Do not reconstruct to change the settings of the protection devices. If the pressure switch, thermal switch, or other protection device is shorted and operated forcibly, or parts other than those specified by GREE are used, fire or explosion may result. Ventilate before operating air conditioner when gas leaked out.
  • Page 7 Ultra Heat GMV VRF Technical Service Manua_Heat Recovery Serial PREFACE AND SAFTY PRECAUTIONS If the air conditioner is installed in a small room, measures must be taken to prevent the refrigerant concentration from exceeding the safety limit when the refrigerant leaks. Consult the dealer regarding the appropriate measures to prevent the safety limit from being exceeded.
  • Page 8 Ultra Heat GMV VRF Technical Service Manua_Heat Recovery Serial PREFACE AND SAFTY PRECAUTIONS Installation Always check for gas (refrigerant) leakage after installation or repair of product. Low refrigerant levels may cause failure of product. Do not install the product where the noise or hot air from the outdoor unit could damage the neighborhoods.
  • Page 9 Ultra Heat GMV VRF Technical Service Manua_Heat Recovery Serial PREFACE AND SAFTY PRECAUTIONS Inadequate connection and fastening may generate heat and cause a fire. Be sure the installation area does not deteriorate with age. If the base collapses, the air conditioner could fall with it, causing property damage, product failure, or personal injury.
  • Page 10 Ultra Heat GMV VRF Technical Service Manual_Heat Recovery Serial UNIT INTRODUCTION CHAPTER 1 INTRODUCTION TO BASIC FEATURES OF UNITS...

  • Page 11: Chapter 1 Introduction To Basic Features Of Units

    Ultra Heat GMV VRF Technical Service Manual_Heat Recovery Serial UNIT INTRODUCTION CHAPTER 1 INTRODUCTION TO BASIC FEATURES OF UNITS 1 BASIC OPERATING PRINCIPLE The operating principle is as follows: When an indoor unit (IDU) is operating in cooling mode, the outdoor unit (ODU) can correspondingly enable the outdoor module based on the operating load requirement of the IDU.

  • Page 12: Internal Piping Design Of The Units

    Ultra Heat GMV VRF Technical Service Manual_Heat Recovery Serial UNIT INTRODUCTION 2 INTERNAL PIPING DESIGN OF THE UNITS 2.1 Piping Design of GMV-VQ72W/A-F(U) 、GMV-VQ96W/A-F(U) 2.1.1 Piping diagram 2.1.2 Names and main functions of components Name Main Function Adjusts its own rotational speed based on the actual requirement of the system to Compressor implement capacity control.
  • Page 13 Ultra Heat GMV VRF Technical Service Manual_Heat Recovery Serial UNIT INTRODUCTION Prevents high-pressure gas from entering the compressor and fast balances the One-way valve suction pressure and discharge pressure in a compressor. Detects the high pressure value in the system in real time mode for compressor High-pressure sensor protection and other control functions.
  • Page 14 Ultra Heat GMV VRF Technical Service Manual_Heat Recovery Serial UNIT INTRODUCTION Avoid impurities getting into the electric parts. Meanwhile, absorb the water inside One-way valve the liquid status to prevent ice blockage. Stop valve, closed when the unit is delivered from the factory and will be opened Liquid valve after installation.
  • Page 15 Ultra Heat GMV VRF Technical Service Manual_Heat Recovery Serial UNIT INTRODUCTION NCHS2B(U): The piping diagram of NCHS4B(U) and NCHS8B(U) is similar to the piping diagram of NCHS2B(U), which have 4 or 8 branches of liquid pipes and gas pipes connecting with IDUs. 2.2.2 Names and main functions of components Name Main Function...

  • Page 16: Basic Parameters Of Unit

    Ultra Heat GMV VRF Technical Service Manual_Heat Recovery Serial UNIT INTRODUCTION 3 BASIC PARAMETERS OF UNIT 3.1 Basic Parameters of ODU Outdoor Units_Heat Recovery Model GMV-VQ72W/A-F(U) GMV-VQ96W/A-F(U) GMV-VQ192WM/A-F(U) GMV-VQ96W/A-F(U)+ Module Combination GMV-VQ72W/A-F(U) GMV-VQ96W/A-F(U) GMV-VQ96W/A-F(U) KBtu/h Nominal Cooling Capacity 21.1 28.1 56.3 KBtu/h Rated Cooling...
  • Page 17 Ultra Heat GMV VRF Technical Service Manual_Heat Recovery Serial UNIT INTRODUCTION Outdoor Units_Heat Recovery Model GMV-VQ72W/A-F(U) GMV-VQ96W/A-F(U) GMV-VQ192WM/A-F(U) GMV-VQ96W/A-F(U)+ Module Combination GMV-VQ72W/A-F(U) GMV-VQ96W/A-F(U) GMV-VQ96W/A-F(U) Type R410A R410A R410A 12.5 12.5 12.5+12.5 Refrigerant Charge Volume lbs. 27.6 27.6 27.6 Control 28.6 28.6 31.8 Low Pressure Gas...
  • Page 18 Ultra Heat GMV VRF Technical Service Manual_Heat Recovery Serial UNIT INTRODUCTION 3.2 C&H Mode Exchanger C&H Mode Exchanger is used for connecting outdoor unit and indoor unit, and providing high pressure, low pressure and medium pressure refrigerant provided by outdoor unit for cooling or heating mode and complete the refrigerant system circulation for the purpose of adjusting indoor temperature.

  • Page 19: Electrical Parameters

    Ultra Heat GMV VRF Technical Service Manual_Heat Recovery Serial UNIT INTRODUCTION Model NCHS1B(U) NCHS2B(U) NCHS4B(U) NCHS8B(U) Max. IDU Branches No. of connectable IDU of each branch Total Connectable IDU Max. Capacity of each branch KBtu/h 48.0 48.0 48.0 48.0 Max. Capacity of connectable IDU KBtu/h 48.0 96.0...
  • Page 20 Ultra Heat GMV VRF Technical Service Manual_Heat Recovery Serial UNIT INTRODUCTION GMV-VQ192WM/A-F(U) 208V/230V 3~ 60Hz 60+60 45+45 60+60 Note: MCA: Minimum Circuit Ampacity; MOP: Maximum Overcurrent Protection.  Power cable wire gauge and circuit breaker must be selected based on the above parameters and in compliance with local safety requirements.

  • Page 21: Optional Accessories

    Ultra Heat GMV VRF Technical Service Manual_Heat Recovery Serial UNIT INTRODUCTION When conducting maintenance based on above circuit diagrams, units must be power-off. Please strictly following the circuit diagrams when reconnecting the wires, otherwise, electric shock may occur. 5 OPTIONAL ACCESSORIES Ultra Heat GMV series VRF units support the following optional accessories: Export Model Remark...
  • Page 22 Ultra Heat GMV VRF Technical Service Manual_Heat Recovery Serial UNIT INTRODUCTION  Functions of low-pressure check valve: It is mainly used for low pressure detection of the system and refrigerant charging during after-sale maintenance. Pipe connection diagram of outdoor module: 2.

  • Page 23: Precautions On Refrigerant Leakage

    Ultra Heat GMV VRF Technical Service Manual_Heat Recovery Serial UNIT INTRODUCTION  During installation, please strictly follow the above capacity range and number to construct, otherwise, units may work abnormally and compressors may even be damaged 7 PRECAUTIONS ON REFRIGERANT LEAKAGE Personnel related to air conditioning engineering design and installation operators must abide by the safety requirement for preventing refrigerant leakage specified in local laws and regulations.

  • Page 24: Unit Operating Temperature

    Ultra Heat GMV VRF Technical Service Manual_Heat Recovery Serial UNIT INTRODUCTION (1) Flow direction of refrigerant leakage. (2) Room for refrigerant leakage. Since the concentration of refrigerant is greater than that of air, pay attention to the spaces where the refrigerant may residue, for example, the basement. If the above equation cannot be satisfied, then follow the following steps.
  • Page 25 Ultra Heat GMV VRF Technical Service Manual_Heat Recovery Serial UNIT INTRODUCTION  If unit operates out of the above range, it may not work stably and components may even be damaged.
  • Page 26 Ultra Heat GMV VRF Technical Service Manual_Heat Recovery Serial INSTALLATION CHAPTER 2 INSTALLATION...

  • Page 27: Chapter 2 Installation

    Ultra Heat GMV VRF Technical Service Manual_Heat Recovery Serial INSTALLATION CHAPTER 2 INSTALLATION PART 1 ENGINEERING INSTALLATION PREPARATION 1 INSTALLATION SAFETY 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 28: Cooperation Between Different Professions

    Ultra Heat GMV VRF Technical Service Manual_Heat Recovery Serial INSTALLATION Insufficient refrigerant circulating in the system decreases the cooling performance of the air conditioner. Long-term operation under such The refrigerant pipe leaks. circumstance may cause an overheating compressor or even damage the compressor.
  • Page 29 Ultra Heat GMV VRF Technical Service Manual_Heat Recovery Serial INSTALLATION placed in the ceiling, if possible. (2) A place should be reserved for the ODU base to prevent the waterproof layer or insulating layer on the roof from being damaged in later phase of installation. At places on walls or floors where pipes need to go through, holes or casing should be preserved.
  • Page 30 Ultra Heat GMV VRF Technical Service Manual_Heat Recovery Serial INSTALLATION...

  • Page 31: Onsite Review Of Design Drawing

    Ultra Heat GMV VRF Technical Service Manual_Heat Recovery Serial INSTALLATION 4 ONSITE REVIEW OF DESIGN DRAWING Installation personnel must carefully read and understand the design scheme and drawings provided by engineering designers, and prepare detailed and feasible construction organization design after reviewing the onsite status.

  • Page 32: Construction Organization Process

    Ultra Heat GMV VRF Technical Service Manual_Heat Recovery Serial INSTALLATION 5 CONSTRUCTION ORGANIZATION PROCESS Above process is a general operation process, which can be adjusted in practice according to local requirements.

  • Page 33: Part 2 Material Selections

    Ultra Heat GMV VRF Technical Service Manual_Heat Recovery Serial INSTALLATION PART 2 MATERIAL SELECTIONS 1 REQUIREMENT FOR SELECTING CONSTRUCTION MATERIALS The materials, equipment and instruments used during air conditioning engineering construction must have certifications and test reports. Products with fireproof requirements must be provided with fireproof inspection certificates and must meet national and relevant compulsory standards.
  • Page 34 Ultra Heat GMV VRF Technical Service Manual_Heat Recovery Serial INSTALLATION Total Length L(m) of Communication Cable Material Type Wire size Remarks between IDU Unit and IDU (ODU ) Unit m(feet) 1) If the wire diameter is enlarged to 2 ×AWG16, the total communication length can reach 1500m (4921- Light/Ordinary 1/4feet).

  • Page 35: Part 3 Installation Space Requirements

    Ultra Heat GMV VRF Technical Service Manual_Heat Recovery Serial INSTALLATION PART 3 INSTALLATION SPACE REQUIREMENTS 1 PLACE SELECTION FOR INSTALLING ODU The widely-used VRF units are applicable for various scenarios. In residential areas, especially in rooms where elderly and infants live, a higher refrigerating performance and noise control is required. Therefore, the ODU with excellent capacity and low noise is preferred;...
  • Page 36 Ultra Heat GMV VRF Technical Service Manual_Heat Recovery Serial INSTALLATION 2) Space dimension for dual-module unit (2) When there is wall (or similar obstruction) above the unit, keep the distance between the unit top and the wall at least 3000mm (118-1/8inch) or above. 1) Space dimension for sigle-module unit When the unit is located in a totally open space with no obstructions in four directions, keep the distance between the unit top and wall at least 1500mm (59inch) or above (See Fig.1).
  • Page 37 Ultra Heat GMV VRF Technical Service Manual_Heat Recovery Serial INSTALLATION Fig.3 Fig.4 (3) Considering the seasonal wind in outdoor unit installation...
  • Page 38 Ultra Heat GMV VRF Technical Service Manual_Heat Recovery Serial INSTALLATION (4) Anti-monsoon installation requirements for unit connecting exhaust duct: (5) Considering snow in outdoor unit installation...
  • Page 39 Ultra Heat GMV VRF Technical Service Manual_Heat Recovery Serial INSTALLATION (6) During the installation of the ODU, induced and exhaust pipes must be connected. In addition, the aperture opening rate of shutters must be at least 80%, and the angle between the shutters and the horizontal plane should be less than 20°...
  • Page 40 Ultra Heat GMV VRF Technical Service Manual_Heat Recovery Serial INSTALLATION Step 1 Step 2 Step 3 Step 4 Step 5 Step 6 Method 2: Remove the unit top case. Detailed operations are as follows: a). Install the ODU (2) and steel-plate ventilating duct (1). Take out the grille from the top of the top case component.
  • Page 41 Ultra Heat GMV VRF Technical Service Manual_Heat Recovery Serial INSTALLATION using tapping screws. c). Pull up the canvas casing reversely and use the steel bar to press the canvas casing tightly onto the counter flange of the steel-plate ventilating duct. Use a hand-operated electric drill to drill holes and fasten the parts by using tapping screws.
  • Page 42 Ultra Heat GMV VRF Technical Service Manual_Heat Recovery Serial INSTALLATION Always lift the unit with ropes attached at four points so that impact is not applied to the unit. Be very careful while carrying the product. ① Do not have only one person carry product if it is more than 20kg (44lbs). ②...

  • Page 43: Part 4 Requirements On Foundation Installation

    Ultra Heat GMV VRF Technical Service Manual_Heat Recovery Serial INSTALLATION PART 4 REQUIREMENTS ON FOUNDATION INSTALLATION 1 ODU FOUNDATION The concrete foundation of the ODU must be strong enough. Ensure that the drainage is smooth and that the ground drainage or floor drainage is not affected. Requirements on the concrete foundation are as follows: ...

  • Page 44: Odu Fixing

    Ultra Heat GMV VRF Technical Service Manual_Heat Recovery Serial INSTALLATION ③ Please take extra cautions on the supporting strength of the ground, liquid outlet treatment (treatment of the liquid flowing out of the outdoor unit in operation), and the passages of the pipe and wiring, when making the ground support.

  • Page 45: Part 5 Piping Connection

    Ultra Heat GMV VRF Technical Service Manual_Heat Recovery Serial INSTALLATION PART 5 PIPING CONNECTION 1 SCHEMATIC DIAGRAM OF PIPING CONNECTION Module Module 2 Branch between Lowpressure gas pipe outdoor units High pressure gas pipe Outdoor Connection pipe between outdoor Liquid pipe connection pipe branch and the first indoor branch Connection pipe between indoor branch and indoor units...

  • Page 46: Allowable Pipe Length And Drop Height Among Idu And Odu

    Ultra Heat GMV VRF Technical Service Manual_Heat Recovery Serial INSTALLATION 3 ALLOWABLE PIPE LENGTH AND DROP HEIGHT AMONG IDU AND Y type branch joint is adopted to connected indoor and outdoor units. Connecting method is shown in the figure below. Remark: Equivalent length of one Y-type manifold is about 0.5m(1-3/4feet).

  • Page 47: Connection Pipe Among Odu Modules

    Ultra Heat GMV VRF Technical Service Manual_Heat Recovery Serial INSTALLATION ≤90(295-1/4) Maximum length of Main pipe(3) ≤40(131-1/4) From IDU to its nearest branch (4) A11,A12,B11,B21,B22,B31,C11,D11, D21,D22 NOTICE! (1) Normally, the pipe length from the first branch of IDU to the farthest IDU is 40m (131-1/4feet). Under the following conditions, the length can reach 90m (295-1/4feet).

  • Page 48: Size Requirment For Fitting Pipe And Branch

    Ultra Heat GMV VRF Technical Service Manual_Heat Recovery Serial INSTALLATION Note: when the distance between outdoor units exceeds 2m (6-1/2 feet), U-type oil trap should be added at low-pressure gas pipe. a≤10m (32-7/8 feet); b≤10m (32-7/8 feet). 5 SIZE REQUIRMENT FOR FITTING PIPE AND BRANCH (1) Connection sketch map of single-module system (2) Connection sketch map of multi-module system...
  • Page 49 Ultra Heat GMV VRF Technical Service Manual_Heat Recovery Serial INSTALLATION 5.1 Pipe selection between outdoor unit and the first indoor branch (L) Select appropriate pipe between outdoor unit and the first indoor branch (L) as per the pipe size of outdoor unit.
  • Page 50 Ultra Heat GMV VRF Technical Service Manual_Heat Recovery Serial INSTALLATION Module’s capacity C (Btu/h) Model C≤327500 ML01R 327500 < C ML02R 5.3 Branch selection of mode exchanger (A1, A2) Model selection for branch ―A1、A2‖ of mode exchanger R410A refrigerant system Total Capacity of the Downstream Indoor Unit X(Btu/h) Model X≤17100...
  • Page 51 Ultra Heat GMV VRF Technical Service Manual_Heat Recovery Serial INSTALLATION R410A refrigerant system Total rated capacity of downsteam indoor units: X(Btu/h) Model X≤48500 Y-type branch FQ01A/A 5.7 Piping size between mode exchanger and downstream indoor unit (b, c, d, g) Pipe between mode exchanger and IDU Rated capacity of indoor unit C(Btu/h)
  • Page 52 Ultra Heat GMV VRF Technical Service Manual_Heat Recovery Serial INSTALLATION Connecting method is shown as in the Fig.23. 1) Branch selection of indoor unit of mode exchanger (―C1‖) Total rated capacity of downstream R410A refrigerant system Model indoor units: X(Btu/h) Y-type branch 48500<X≤96000 FQ01B/A...

  • Page 53: Part 6 Pipe Installation And Insulation

    Ultra Heat GMV VRF Technical Service Manual_Heat Recovery Serial INSTALLATION PART 6 PIPE INSTALLATION AND INSULATION 1 PIPE INSTALLATION FOR THE COOLING SYSTEM 1.1 Precautions on Pipe Direction Design Refrigerant pipe layout must be designed in accordance with the following principles: (1) The air conditioning installation should not damage the bearing structure or the decorative style.
  • Page 54 Ultra Heat GMV VRF Technical Service Manual_Heat Recovery Serial INSTALLATION  ① Always careful not to leak the refrigerant during welding. ② The refrigerant generates poisonous gas harmful to human body if combusted. ③ Do not perform welding in a closed space. ④...
  • Page 55 Ultra Heat GMV VRF Technical Service Manual_Heat Recovery Serial INSTALLATION welding joint and the bending part should be less than 100 mm(3.94inch). 1.2.4 Pipe expanding Pipe expanding is used to provide a welding point for pipe connection. Requirements on pipe expanding are as follows: (1) All burrs and sundries inside the pipe must be cleared after cut-off.
  • Page 56 Ultra Heat GMV VRF Technical Service Manual_Heat Recovery Serial INSTALLATION (3) Construction of steel casings Equip a steel casing for all pipes which are led through the wall or floor. Pipe welding joints cannot be placed inside the sleeve. The steel casing must be parallel with the bottom of the wall or floor but be 20 mm(0.8inch) or more above the bottom.
  • Page 57 Ultra Heat GMV VRF Technical Service Manual_Heat Recovery Serial INSTALLATION 1.3.4 Pipe connection 1.3.4.1 Flaring connection The refrigerant pipes and IDUs are connected by using the flare opening. Therefore, the quality of flaring connection must be ensured. The flaring depth of the bell mouth cannot be smaller than the caliber.
  • Page 58 Ultra Heat GMV VRF Technical Service Manual_Heat Recovery Serial INSTALLATION The nitrogen flow is above 4-6 L/min (pressure of 0.02 to 0.05 MPa) and must be regulated based on the pipe caliber.  During welding, nitrogen-filling protection must be conducted; otherwise, the remaining substance in pipeline will cause blockage or leakage to the system (e.g.
  • Page 59 Then insert the copper pipe to proper depth. A concave bag for positioning is available to the manifold purchased from Gree. (8) Because the manifold structure is complex, perform with care to ensure tight insulation.
  • Page 60 Ultra Heat GMV VRF Technical Service Manual_Heat Recovery Serial INSTALLATION Before connecting the flare opening of the pipe to the IDU, connect the pressure regulator valve on the nitrogen cylinder to the liquid pipe in the outdoor pipe system. Regulate the nitrogen pressure to about 5 kgf/cm²...

  • Page 61: Pipe Installations For The Condensate Water System

    Ultra Heat GMV VRF Technical Service Manual_Heat Recovery Serial INSTALLATION 2 PIPE INSTALLATIONS FOR THE CONDENSATE WATER SYSTEM 2.1 Pipes All of the selected condensate pipes must be consistent with local laws and regulations. 2.2 Requirements on Installation (1) Determine the direction and elevation of a condensate water pipe before installing it. Avoid overlapping it with other pipes to ensure straight inclination.
  • Page 62 Ultra Heat GMV VRF Technical Service Manual_Heat Recovery Serial INSTALLATION 2.3 Other Requirements (1) Ensure an inclination degree of more than 1% when connecting the drain pipe to the IDU. (2) When connecting the drain pipe to that of the IDU, fix the pipes with the bands provided upon delivery instead of using the glue to facilitate further maintenance.
  • Page 63 Ultra Heat GMV VRF Technical Service Manual_Heat Recovery Serial INSTALLATION (1) Drain Pipe Installation for Hidden Air-duct-type IDU for Air Supply a. Ensure an inclination degree of greater than 1% when connecting the drain pipe to the IDU. b. When connecting the drain pipe to that of the IDU, fix the pipes with the bands instead of using the glue to facilitate further maintenance.

  • Page 64: Insulation System

    Ultra Heat GMV VRF Technical Service Manual_Heat Recovery Serial INSTALLATION c. The drain pump shall be fixed securely. Otherwise, abnormal noises will be generated. 2.5 Requirements on Independent Drainage for Each IDU Requirements on independent drainage design for each IDU are as follows: (1) There must be a proper inclination for the drain pipe.
  • Page 65 Ultra Heat GMV VRF Technical Service Manual_Heat Recovery Serial INSTALLATION 3.1.3 Procedure of insulation (1) Select insulation materials based on design requirements. (2) Wear the insulation sleeve before connecting refrigerant pipes. Users cannot cut the insulation material apart and then wrap up with ties after connecting the pipes by welding. (3) Specifications of the insulation sleeve must match with that of the refrigerant pipes.

  • Page 66: Part 7 Electric And Controller Installation

    Ultra Heat GMV VRF Technical Service Manual_Heat Recovery Serial INSTALLATION PART 7 ELECTRIC AND CONTROLLER INSTALLATION  ① Follow ordinance of your governmental organization for technical standard related to electrical equipment, wiring regulations and guidance of each electric power company. ②...

  • Page 67: Installation Of The Power Cable

    Ultra Heat GMV VRF Technical Service Manual_Heat Recovery Serial INSTALLATION Method 2: Use different types of cables. The diameter of the power cable is larger than that of the communication cable. Alternatively, adopt three cores or more for the power cable and two cores for the communication cable. Elaborate the method with the installation personnel on site no matter which method is adopted.
  • Page 68 Ultra Heat GMV VRF Technical Service Manual_Heat Recovery Serial INSTALLATION power of the IDU or ODU. 1) External connection for individual unit NOTICE! Maximum number of IDU is based upon ODU capacity. For details, please refer to the introduction of units’ combination. 2) External connection for modular mode exchanger unit...
  • Page 69 Ultra Heat GMV VRF Technical Service Manual_Heat Recovery Serial INSTALLATION NOTICE! Maximum number of ODU (N) and maximum number of IDU (n) are based upon the combination type of ODU. For details, please refer to the introduction of unit combination. ...
  • Page 70 Ultra Heat GMV VRF Technical Service Manual_Heat Recovery Serial INSTALLATION The maximum number of connected IDUs (n) is determined based on the capacity of the ODU. For details, see the description on unit capacity configuration. 2.3 Procedure for Installing the Power Cable (1) Knock off the knockouts used for threading the external power cable, fit the threading rubber ring to the hole, and thread the power cable through the hole.

  • Page 71: Installation Of The Communication System

    Ultra Heat GMV VRF Technical Service Manual_Heat Recovery Serial INSTALLATION 2) While installation, please make sure the metal parts are taken down. Then fasten the compressor fixed nuts again and re-wrap the soundproof material. Note: if the unit is operating with the metal parts stay, it may lead to compressor abnormal vibration;...
  • Page 72 Ultra Heat GMV VRF Technical Service Manual_Heat Recovery Serial INSTALLATION 3.1 Connection of Communication Cable Terminals All connections for communication of Ultra Heat GMV are fastened by screws. 3.2 Connection of Communication Cables The communication bus of indoor and ODUs must be connected in series instead of in star mode. The last mode exchanger of the bus shall be connected to a matching resistor (placed in the package of the ODU).
  • Page 73 Ultra Heat GMV VRF Technical Service Manual_Heat Recovery Serial INSTALLATION...
  • Page 74 Ultra Heat GMV VRF Technical Service Manual_Heat Recovery Serial INSTALLATION 3.3 Communication Cable Connection Method and Procedure 3.3.1 Communication cable connection between the IDUs and ODUs The communication cable between the IDUs and ODUs is connected via interface D1/D2. Connection modes for the single-module system are shown in the following figures. Connection of communication for single-module system and single-module converter system:...
  • Page 75 Ultra Heat GMV VRF Technical Service Manual_Heat Recovery Serial INSTALLATION Connection of communication for multi-module converter system:...
  • Page 76 Ultra Heat GMV VRF Technical Service Manual_Heat Recovery Serial INSTALLATION Connection of communication for multi-module system and multi-module mode exchanger system:...
  • Page 77 Ultra Heat GMV VRF Technical Service Manual_Heat Recovery Serial INSTALLATION Connection of communication for multi refrigeration systems:...
  • Page 78 Ultra Heat GMV VRF Technical Service Manual_Heat Recovery Serial INSTALLATION ① For modular outdoor units, if there are multiple outdoor modules, then the master unit must be the first outdoor module on the communication wire and should not connect with IDU (master unit is set by S7 of the outdoor main board). ②...
  • Page 79 Ultra Heat GMV VRF Technical Service Manual_Heat Recovery Serial INSTALLATION One wired controller controlling one IDU Two wired controllers controlling one IDU One wired controller controlling multiple IDUs Two wired controllers controlling multiple IDUs When two wired controllers control multiple IDUs, the wired controllers can be connected to any IDU which is in the same series.
  • Page 80 Ultra Heat GMV VRF Technical Service Manual_Heat Recovery Serial INSTALLATION (3) Users can press the ―ENTER/CANCEL‖ button to return to the previous level till parameter setting exits. The parameter setting list is shown below: Parameter Parameter Parameter Default Remark code name scope value...

  • Page 81: Part 8 Vacuumization And Desiccation For The Refrigerant System

    Ultra Heat GMV VRF Technical Service Manual_Heat Recovery Serial INSTALLATION PART 8 VACUUMIZATION AND DESICCATION FOR THE REFRIGERANT SYSTEM Works for the refrigerant system include cleaning and desiccating the pipes, performing an air-tightness test, and affusing refrigerant. 1 AIR-TIGHTNESS TEST 1.1 Importance of the Air-tightness Test Air-tightness of the multi-module air conditioning system mainly refers to the tightness of the refrigerant pipes, which ensures secure and reliable running of the air conditioner.

  • Page 82: Vacuumization And Desiccation For The System

    Ultra Heat GMV VRF Technical Service Manual_Heat Recovery Serial INSTALLATION (6) Before performing the air-tightness test to the refrigerant pipes, do not conduct insulation or wrapping at the welding or flaring opening joints of the IDU. The pressure must be increased simultaneously for pipes on outdoor sides and cannot be increased for pipes on one side.
  • Page 83 Ultra Heat GMV VRF Technical Service Manual_Heat Recovery Serial INSTALLATION for 1 hour. 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 1 hour. Ensure that the pressure of the regulator valve does not increase.

  • Page 84: Part 9 Refrigerant Perfusion

    Ultra Heat GMV VRF Technical Service Manual_Heat Recovery Serial INSTALLATION PART 9 REFRIGERANT PERFUSION 1 CALCULATION METHOD FOR PERFUSING REFRIGERANT Outdoor unit has been charged refrigerant before delivery. If field-installed connecting pipeline is longer than 1m(39-3/8inch), please refer to the following table for charging amount of refrigerant.

  • Page 85: Method For Perfusing Refrigerant

    Ultra Heat GMV VRF Technical Service Manual_Heat Recovery Serial INSTALLATION IDU/ODU rated capacity collocation ratio C=18×10/192=94%.The quantity of included IDUs is more than 8 sets. Please refer to the above table. Refrigerant charging amount B for GMV-VQ96W/A-F(U) module is3kg(6.6 lbs). Refrigerant charging amount B for GMV-VQ96W/A-F(U) module is3kg(6.6 lbs).
  • Page 86 Ultra Heat GMV VRF Technical Service Manual_Heat Recovery Serial INSTALLATION desiccation. Step 2: After vacuumization and desiccation are finished, turn off valves of the high pressure gauge and low pressure gauge. Disconnect the medium gauge pipe from the vacuum pump and connect it to the refrigerant tank.
  • Page 87 Ultra Heat GMV VRF Technical Service Manual_Heat Recovery Serial INSTALLATION Step 11: Remove the pressure gauge. 2.2 Refrigerant Perfusion During Running Step 1: Turn off the valve of the refrigerant tank and reconnect the pressure gauge pipe. Disconnect the low pressure gauge pipe from the detection valve opening of the gas pipe and connect it to the low pressure check valve, as shown in the following figure.
  • Page 88 Ultra Heat GMV VRF Technical Service Manual_Heat Recovery Serial INSTALLATION  Pipe to be vacuumed : gas pipe, water pipe, common pipe  If the refrigerant amount is not exact, it may not operate properly.  If additionally bottled refrigerant amount is over ±10%, condenser burning or insufficient indoor unit performance may be caused.
  • Page 89 Ultra Heat GMV VRF Technical Service Manual_Heat Recovery Serial COMMISSIONING OPERATION CHAPTER 3 COMMISSIONING OPERATION...

  • Page 90: Chapter 3 Commissioning Operation

    Ultra Heat GMV VRF Technical Service Manual_Heat Recovery Serial COMMISSIONING OPERATION CHAPTER 3 COMMISSIONING OPERATION PART 1 SECURITY REQUIREMENTS 1 PRECAUTIONS FOR CONSTRUCTION  All commissioning and maintenance personnel must learn and strictly comply with construction security specifications. Security measures must be taken especially for outdoor operations. ...
  • Page 91 Ultra Heat GMV VRF Technical Service Manual_Heat Recovery Serial COMMISSIONING OPERATION 3.1 System Function DIP Switch Settings Factory Name Meaning Remark Switch Settings Outdoor silent Sets the noise grades of unit This DIP switch is used to set noise grades mode setting when necessary, especially for at the place needing low noise.
  • Page 92 Ultra Heat GMV VRF Technical Service Manual_Heat Recovery Serial COMMISSIONING OPERATION 3.1.1 Outdoor silent mode setting DIP switch (S1) The outdoor silent mode setting DIP switch (S1) is used to set noise grades at the place needing low noise, such as hospital, hotel at night, no matter in the daytime or nighttime. The silent modes of unit include standard mode, low noise mode, medium noise mode, superlow noise mode.
  • Page 93 Ultra Heat GMV VRF Technical Service Manual_Heat Recovery Serial COMMISSIONING OPERATION when different refrigerating systems are controlled in a centralized manner. The default factory setting is "00000". If it is not required to use centralized control between multiple refrigerating systems, this DIP switch can retain the factory settings without being changed.
  • Page 94 Ultra Heat GMV VRF Technical Service Manual_Heat Recovery Serial COMMISSIONING OPERATION following methods: Module Emergency Setting DIP Switch (S4) DIP1 DIP2 Remark Not shielding the operation of the abnormal module Shielding the operation of the abnormal module Precautions: ① When the DIP switch setting is not covered in the above scope, a DIP switch setting exception fault may occur.
  • Page 95 Ultra Heat GMV VRF Technical Service Manual_Heat Recovery Serial COMMISSIONING OPERATION (1) Explanation of DIP switch positions On the DIP switch, ―ON‖ indicates ―0‖ status and the opposite direction indicates ―1‖ status. The position of white lever indicates the position to be set to. (2) Example The following takes outdoor fan static pressure settings as an example.
  • Page 96 Ultra Heat GMV VRF Technical Service Manual_Heat Recovery Serial COMMISSIONING OPERATION The main board AP7 of the ODU consists of six function buttons: Function Button Name and Meaning Button Code Function Meaning FUNCTION Indicates the function button, used for function settings. Indicates the upward selection button.
  • Page 97 Ultra Heat GMV VRF Technical Service Manual_Heat Recovery Serial COMMISSIONING OPERATION 3.3 Function Setting Operations Step 1: Open the commissioning window of the master unit panel. Step 2: Power on the entire unit. Step 3: Press "SW1" on the master unit at least 2 seconds to enter the to-be-selected status of function settings.
  • Page 98 Ultra Heat GMV VRF Technical Service Manual_Heat Recovery Serial COMMISSIONING OPERATION (LED3). The master unit is displayed as follows: LED1 LED2 LED3 Function Code Display Mode Confirmation Display Mode Current Data Display Mode Blinking Blinking Next, if ―On‖ data is selected, then press "SW4" to confirm it. The master unit is displayed as follows: LED1 LED2...
  • Page 99 Ultra Heat GMV VRF Technical Service Manual_Heat Recovery Serial COMMISSIONING OPERATION If LED2 shows 2 and LED3 shows 80, it means high High pressure 0.01MPa pressure is 2.80MPa. Online ODU quantity Online IDU quantity NOTE: On the master unit, press "SW5" to return to the upper level if there are two levels of menu. And press "SW5"...
  • Page 100 Ultra Heat GMV VRF Technical Service Manual_Heat Recovery Serial COMMISSIONING OPERATION (LED3). The master unit is displayed as follows: LED1 LED2 LED3 Function Code Display Mode Confirmation Display Mode Current Data Display Mode Blinking Blinking Next, if ―On‖ data is selected, then press "SW4" to confirm it. The master unit is displayed as follows: LED1 LED2...

  • Page 101: Part 2 Commissioning Process

    Ultra Heat GMV VRF Technical Service Manual_Heat Recovery Serial COMMISSIONING OPERATION PART 2 COMMISSIONING PROCESS NOTICE！ ① It is forbidden to directly connect the compressor with power supply and forcibly power it on during commissioning and maintenance. ② Engineering commissioning operations must be performed on the Ultra Heat GMV serial unit. Otherwise, the unit cannot properly run.

  • Page 102: Engineering Commissioning Procedures

    (1) Make sure that the following tools or instruments are prepared before commissioning. (2) Make sure that the commissioning software is correct before commissioning. (3) The professional after sales commissioning software provided by GREE should be used for commissioning of GREE VRF system.
  • Page 103 Ultra Heat GMV VRF Technical Service Manual_Heat Recovery Serial COMMISSIONING OPERATION (2) Check system refrigerants before startup Before the system is started, connect the liquid-tube valve of ODU with a high pressure gauge and the gas-tube valve of ODU with a low pressure gauge, and then read their values. In this case, high pressure and low pressure of the system should be in balance status, and the difference between the saturation temperature corresponding to the balanced pressure value and the environment temperature (the higher in outdoor and indoor temperatures is taken as environment temperature) should not be...
  • Page 104 Ultra Heat GMV VRF Technical Service Manual_Heat Recovery Serial COMMISSIONING OPERATION The air conditioning unit works at a current much larger than the rated current (the working current changes in a large scope in different conditions). The power grid provides unstable voltages and the line power factor decreases.
  • Page 105 Ultra Heat GMV VRF Technical Service Manual_Heat Recovery Serial COMMISSIONING OPERATION ―U3‖ should disappear. 3.2.4 Communication system check (1) The following communication contents must be checked again before commissioning: Communication cables cannot be laid out in the same trough as power cables. Communication cables should be independently laid out in hard fire-resistant PVC tubes.
  • Page 106 Ultra Heat GMV VRF Technical Service Manual_Heat Recovery Serial COMMISSIONING OPERATION Does the wall thickness of copper tubes meet design requirements? Are disperse pipes horizontal or vertical? Does the diameter of cables connected with IDUs and ODUs comply with unit design requirements? Do the circuit breaker and leakage switch comply with unit design requirements? Is the spacing between the power cable and the TV set larger than 1 m? Do communication cable materials comply with unit design requirements?
  • Page 107 Ultra Heat GMV VRF Technical Service Manual_Heat Recovery Serial COMMISSIONING OPERATION Cooling mode when the outdoor environment temperature is higher than 20° C（68℉）. Heating mode when the outdoor environment temperature is lower than 20° C（68℉）. (3) Before starting commissioning, make sure again that stop valves of all basic modules of the ODU have been completely opened.
  • Page 108 Ultra Heat GMV VRF Technical Service Manual_Heat Recovery Serial COMMISSIONING OPERATION Communication between master Light ODU and inverter compressor driver has error. 05_Internal Communication between master communication Light ODU and IDUs has error. detection System detection is done. Next Light Light Light step will start automatically.
  • Page 109 Ultra Heat GMV VRF Technical Service Manual_Heat Recovery Serial COMMISSIONING OPERATION 3.3.2 Commissioning operations mode The Ultra Heat GMV provides two commissioning methods. One is direct operation on main board of outdoor units while the other is PC operation via special software. In PC software debugging, indoor/outdoor parameters can be displayed and historical data can be recorded and inquired.
  • Page 110 Ultra Heat GMV VRF Technical Service Manual_Heat Recovery Serial COMMISSIONING OPERATION According to the above errors, reset the master unit (Set master unit S7 as ―00‖; Set slave unit S7 as ―10‖), then start debugging again. Step 7: Progress 02 is allocating addresses. If allocating addresses is done, then main board shows: ——...
  • Page 111 Ultra Heat GMV VRF Technical Service Manual_Heat Recovery Serial COMMISSIONING OPERATION LED1 LED2 LED3 Progress Code Display status Code Display status Code Display status 05_Internal communication Light Light Light detection If error is detected, system will stay at current progress. Error has to be solved manually. Related errors are: ——...
  • Page 112 Ultra Heat GMV VRF Technical Service Manual_Heat Recovery Serial COMMISSIONING OPERATION Display Display Display Code Code Code status status status System detects error on indoor 07_Detect XXXX/ components. XXXX means the indoor Error Light project code of IDU with error. 3s components code later, related error code will be...
  • Page 113 Ultra Heat GMV VRF Technical Service Manual_Heat Recovery Serial COMMISSIONING OPERATION —— Debugging code Progress code Status code LED1 LED2 LED3 progress Code Display status code Display status Code Display status 09_Refrigerant judgments before Light startup Step 15: Progress 12 is ―Confirm debugging startup‖. In order to make sure all preparation work is done before startup, this step is designed for user to confirm the startup again.
  • Page 114 3.3.2.2 Commissioning through Commissioning Software Step 1: Install commissioning software to the computer and connect monitoring communication cables (for details about the operation method, see the "GREE VRF Commissioning Software" section). Step 2: Completely cover the front panel of ODU.
  • Page 115 Ultra Heat GMV VRF Technical Service Manual_Heat Recovery Serial COMMISSIONING OPERATION Click "Start" to enter the commissioning function and the software automatically performs commissioning. " " indicates that commissioning is being performed on the phase and " " indicates that commissioning is passed on the phase. For the phase with "OK"...
  • Page 116 Ultra Heat GMV VRF Technical Service Manual_Heat Recovery Serial COMMISSIONING OPERATION references for selection. Click "Close" to close the information (the number of commissioning units is displayed in "3 Confirm ODU Basic Module NO." and "4 Confirm IDU NO."; the preheating period is displayed in "8 Compressor Preheat Confirmation").
  • Page 117 Ultra Heat GMV VRF Technical Service Manual_Heat Recovery Serial COMMISSIONING OPERATION " " indicates that commissioning is not passed on the phase and troubleshooting is required (after troubleshooting, the unit automatically enters the next step if no "OK" exists or click "OK" to enter the next step).
  • Page 118 Ultra Heat GMV VRF Technical Service Manual_Heat Recovery Serial COMMISSIONING OPERATION Step 13, 14, 15, and 16 are parallel steps (one of the five steps will be selected according to the actual unit). At last, engineering commissioning is completed when " "...
  • Page 119 Ultra Heat GMV VRF Technical Service Manual_Heat Recovery Serial COMMISSIONING OPERATION new debugging process can be performed. Note: During commissioning, users must listen to the operating sound of both outdoor and indoor fans and compressors to check for exceptions. 3.3.3 Operations after commissioning Sort and save data.
  • Page 120 Ultra Heat GMV VRF Technical Service Manual_Heat Recovery Serial MAINTENANCE CHAPTER 4 MAINTENANCE...

  • Page 121: Chapter 4 Maintenance

    Ultra Heat GMV VRF Technical Service Manual_Heat Recovery Serial MAINTENANCE CHAPTER 4 MAINTENANCE PART 1 FAILURE CODE TABLE 1 SYSTEM FAILURE CODE TABLE Check the following items before contacting for repair. Indoor: Error Code Content Error Code Content Malfunction of lower water temperature Malfunction of IDU sensor of water tank Protection of indoor fan...
  • Page 122 Ultra Heat GMV VRF Technical Service Manual_Heat Recovery Serial MAINTENANCE Outdoor: Error Code Content Error Code Content Limited frequency reduction for high Malfunction of ODU pressure protection Limited frequency reduction for low pressure High-pressure protection protection Limited frequency reduction for power Discharge low-temperature protection protection Limited frequency reduction for IPM...
  • Page 123 Ultra Heat GMV VRF Technical Service Manual_Heat Recovery Serial MAINTENANCE Error Code Content Error Code Content Drive IPM high temperature protection of Malfunction of temperature sensor of oil compressor return 4 Desynchronizing protection of inverter Malfunction of driving board of fan compressor Malfunction of drive storage chip of Driving board of fan operates abnormally...
  • Page 124 Ultra Heat GMV VRF Technical Service Manual_Heat Recovery Serial MAINTENANCE Error Code Content Error Code Content Communication malfunction between mode Setting of main IDU is succeeded exchanger and IDU Emergency operation DIP switch code of Malfunction of multiple main control units compressor is wrong Address DIP switch code of system is Charging of refrigerant is invalid...

  • Page 125: Odu Leds Table

    Ultra Heat GMV VRF Technical Service Manual_Heat Recovery Serial MAINTENANCE 2 ODU LEDS TABLE On the master ODU AP7, there are three LEDS and the flashing meaning is: Flicker Green Yellow Times Drive board Outdoor unit is always at ON status Fan ON Reservation Reservation...
  • Page 126 Ultra Heat GMV VRF Technical Service Manual_Heat Recovery Serial MAINTENANCE On the master ODU AP4 and AP6, there are two LEDS and the flashing meaning is: Flicker Times Green Yellow Drive board 1 Fan ON PFC board 1 Compressor ON Drive board 2 IPM Overcurrent for fan PFC board 2...

  • Page 127: Part 2 Exceptions And Troubleshooting

    Ultra Heat GMV VRF Technical Service Manual_Heat Recovery Serial MAINTENANCE PART 2 EXCEPTIONS AND TROUBLESHOOTING 1 HOW TO LOCATE A FAULTY IDU PROMPTLY Use the IDU project number enquiry and faulty IDU locating function to locate a faulty IDU or wired controller's corresponding IDU as follows when multiple IDUs are running in one place: C01 Indoor project number and fault enquiry...

  • Page 128: Exceptions Analyzing And Troubleshooting

    Ultra Heat GMV VRF Technical Service Manual_Heat Recovery Serial MAINTENANCE NOTE1: If the enquired IDU is normal, no fault code will be displayed in the temperature area; if the unit indoor has multiple faults, fault codes will be displayed in the temperature area at an interval of 3 seconds.
  • Page 129 Ultra Heat GMV VRF Technical Service Manual_Heat Recovery Serial MAINTENANCE ODUs are broken. 4) Replace the main board. 3) Communication cables between ODUs are poorly connected. 4) The control board is faulty. 1) The S7 dial switch of the ODU is 1) Switch the S7 dial switch of an ODU to 00;...
  • Page 130 Ultra Heat GMV VRF Technical Service Manual_Heat Recovery Serial MAINTENANCE DC bus high voltage power cable of the whole system required range; protection exceed 800 V; 2) Replace the compressor drive board. 2) The compressor drive board is faulty. 1) Is the voltage of the input power Compressor drive cable of the whole system lower 1) Elevate the voltage of the input power cable to...
  • Page 131 Ultra Heat GMV VRF Technical Service Manual_Heat Recovery Serial MAINTENANCE manual of wired controller to ensure that no IDU‘s project number is repeated. When C5 occurs on different cooling systems controlled in a centralized way, the C5 fault can be solved by debugging software or remote controller.
  • Page 132 Ultra Heat GMV VRF Technical Service Manual_Heat Recovery Serial MAINTENANCE Fig.2 If project commissioning is finished and the IDU whose the conflict occurs needs to be set separately. Click Project Number Conflict, as shown in Fig.3. The pop-up box comprises two parts: conflicting IDU box, showing the IDU‘...
  • Page 133 Ultra Heat GMV VRF Technical Service Manual_Heat Recovery Serial MAINTENANCE Fig.4 If the conflict is solved, the system will return to the normal status and IDUs can be operated, as shown in Fig.5. Fig.5...
  • Page 134 Ultra Heat GMV VRF Technical Service Manual_Heat Recovery Serial MAINTENANCE If project commissioning is not finished and all the IDUs‘ project numbers need to be reset, click Set All IDUs Project Number shown in Fig.2. As shown in Fig.6, the pop-up box comprises two parts: Systems Selection, where you can choose the system to be reset;...
  • Page 135 Ultra Heat GMV VRF Technical Service Manual_Heat Recovery Serial MAINTENANCE...
  • Page 136 Ultra Heat GMV VRF Technical Service Manual_Heat Recovery Serial MAINTENANCE (2) System high pressure protection (E1)
  • Page 137 Ultra Heat GMV VRF Technical Service Manual_Heat Recovery Serial MAINTENANCE (3) System low pressure protection (E3)
  • Page 138 Ultra Heat GMV VRF Technical Service Manual_Heat Recovery Serial MAINTENANCE (4) System refrigerant lacking protection (U4)
  • Page 139 Ultra Heat GMV VRF Technical Service Manual_Heat Recovery Serial MAINTENANCE (5) Indoor unit anti-freezing protection (L5) (6) Indoor unit water overflow protection (L3)
  • Page 140 Ultra Heat GMV VRF Technical Service Manual_Heat Recovery Serial MAINTENANCE (7) Temperature sensor fault (8) Pressure sensor fault...
  • Page 141 Ultra Heat GMV VRF Technical Service Manual_Heat Recovery Serial MAINTENANCE (9) Analyzing of drive control system faults When the unit fails and halts, first check the two-digit nixie tube of the main board and fault table to find out the specific fault. Then check and solve the fault according to the following methods. 1) Communication failure between the compressor's drive board and control board (outdoor fault...
  • Page 142 Ultra Heat GMV VRF Technical Service Manual_Heat Recovery Serial MAINTENANCE 2) Faults in the current detection circuit drive of compressor (ODU fault PC) and out-of-step protection of compressor (ODU fault P9) 3) AC over-current protection (ODU fault P5) and IPM module over-current protection faults (ODU fault P6) Attachment: How to check whether the IPM module is damaged a.
  • Page 143 Ultra Heat GMV VRF Technical Service Manual_Heat Recovery Serial MAINTENANCE the compressor from the drive board two minutes after the system is powered off. Make sure that it is tested at least two minutes after the system is powered off. Then put the multi-meter to diode test step.
  • Page 144 Ultra Heat GMV VRF Technical Service Manual_Heat Recovery Serial MAINTENANCE PFC board 4) Variable-frequency compressor drive board IPM over-temperature fault (ODU fault P8)
  • Page 145 Ultra Heat GMV VRF Technical Service Manual_Heat Recovery Serial MAINTENANCE 5) Recharging circuit faulty of the variable-frequency compressor drive board (ODU fault PF) 6) High voltage protection for the DC bus of the variable-frequency compressor's drive board (ODU fault PH)
  • Page 146 Ultra Heat GMV VRF Technical Service Manual_Heat Recovery Serial MAINTENANCE 7) Low voltage protection for the DC bus of the variable-frequency compressor's drive board (ODU fault PL)

  • Page 147: Part 3 Key Parts Maintenance

    Ultra Heat GMV VRF Technical Service Manual_Heat Recovery Serial MAINTENANCE PART 3 KEY PARTS MAINTENANCE 1 CAUTIONS ON CONTROLLER REPLACEMENT 1.1 Cautions on IDU AP1 Replacement Before replacing IDU AP1, determine the module is a master IDU or a slave IDU. For heat recovery VRF, there is no master IDU.
  • Page 148 Ultra Heat GMV VRF Technical Service Manual_Heat Recovery Serial MAINTENANCE 1.1.3 Cautions on replacement of master IDU AP1 If the AP1 of the master IDU needs to be replaced, after the IDU is powered on, ―No master IDU (L7)‖ or ―Project number conflict (C5)‖ alarm may be reported. (1) Troubleshoot for ―no master IDU (L7)‖...
  • Page 149 Ultra Heat GMV VRF Technical Service Manual_Heat Recovery Serial MAINTENANCE new project number. Method 3: If the IDU is configured with the Debugger, configure a new project number through this software. TIP: If there are N units within the network, the units should be numbered from N+1. Special situation: In some cases, the created project number is identical to that of a unit within the network.

  • Page 150: Compressor Replacement And Cautions

    Ultra Heat GMV VRF Technical Service Manual_Heat Recovery Serial MAINTENANCE (3) If there are two wired controls controlling one or multiple IDUs, perform the steps below first: Set the wired control parameter ―P13‖ to change the address of one control to 01 (master) and that of the other control to 02 (slave);...
  • Page 151 Ultra Heat GMV VRF Technical Service Manual_Heat Recovery Serial MAINTENANCE For inverter compressors, current will be deviated 10% while rate of turn and operating condition vary. (1) For inverter compressors QXAW-F518zX440B: The figures below shows cooling capacity curves, and input power curves, and refrigerant flow rate curves, which are obtained in the testing condition that suction temperature is 35℃, and liquid subcooled temperature is 8.3℃, and ambient temperature is 35℃.
  • Page 152 Ultra Heat GMV VRF Technical Service Manual_Heat Recovery Serial MAINTENANCE Step 3: Check whether the electric expansion valves of ODUs and the 4-way valves act, and whether the oil return pipes and oil balance valves 1 and 2 are normal. Touch the pipelines next to the return capillary tubes to check whether there is oil flowing.
  • Page 153 Ultra Heat GMV VRF Technical Service Manual_Heat Recovery Serial MAINTENANCE Labels on the 4-way valve and their meanings: D – connects to exhaust; E – connects to IDU evaporator; S – connects to intake of gas separator; C – connects to condenser. When the system is cooling, the pipe at side C works at high pressure high temperature, the pipes at sides E and S work at low pressure low temperature;...
  • Page 154 Ultra Heat GMV VRF Technical Service Manual_Heat Recovery Serial MAINTENANCE 2) Set a multimeter to gear diode. For Drive board: Use the black probe of the multi-meter to touch the place marked by P and the red probe to touch places marked by U, V and W respectively and record readings of the multi-meter.
  • Page 155 Ultra Heat GMV VRF Technical Service Manual_Heat Recovery Serial MAINTENANCE you will reconnect them in a correct manner after clearing. The removed electric box must be covered and protected from wind and sun. After the box is removed, take care with the removal of electric parts‘ lines. DO NOT pull the lines with excessive force;...
  • Page 156 Ultra Heat GMV VRF Technical Service Manual_Heat Recovery Serial MAINTENANCE Handling procedure varies with compressor model. (1) Inverter compressors and oil quality If the inverter compressor is damaged, remove the inverter compressor. The procedure is as follows: After the compressor and oil separator are removed, check oil quality. If oils are contaminated, replace the compressor, oil separator, and gas/liquid separator.
  • Page 157 Ultra Heat GMV VRF Technical Service Manual_Heat Recovery Serial MAINTENANCE Remove the oil separator. For the removal procedure, refer to step 4. Tilt the separator to draw oil out into a container. Block the container for further factory inspection. (2) Check gas/liquid separator. After the gas/liquid separator is taken out, check whether it contains impurities.
  • Page 158 Ultra Heat GMV VRF Technical Service Manual_Heat Recovery Serial MAINTENANCE Oil balance pipe Oil return pipe Step 6: Clear pipeline system. Check pipelines for abnormalities. Charge nitrogen into the main pipeline and clear the pipeline system. (1) Clear oil balance pipe. (2) Clear oil return pipe.
  • Page 159 Ultra Heat GMV VRF Technical Service Manual_Heat Recovery Serial MAINTENANCE (3) Clear liquid pipe filters. For other pipeline parts, clear them based on actual situation. If you do not replace the parts immediately, make sure to block the pipes with tapes, preventing air moistures and impurities from contaminating them.
  • Page 160 Ultra Heat GMV VRF Technical Service Manual_Heat Recovery Serial MAINTENANCE Note: Compressor lubricant must be kept completely airtight. GREE compressors use special lubricant FV50S whose moisture absorption capability is high. Requirements on air-tightness of these compressors are higher. (2) Prepare other materials.
  • Page 161 Ultra Heat GMV VRF Technical Service Manual_Heat Recovery Serial MAINTENANCE Step 9: Install a new oil separator. The original oil separator, if is found to have no impurities or other objects, can be used further more. This part serves as a container and it does not have complex structure. However, if it contains impurities or other objects, replace it.
  • Page 162 Ultra Heat GMV VRF Technical Service Manual_Heat Recovery Serial MAINTENANCE Note: Keep wiring identical to factory installation. Control varies with compressors. Wrong wiring or inverse connection of the compressors may cause damage to units. Cautions on replacement of compressors: ① Before installing new compressors, remove the sealing rubbers and weld the compressors with corresponding pipes.
  • Page 163 (6) After a required amount of lubricant is added, close the oil checking valve to ensure tightness. Note: Lubricant is of great importance to the normal running of compressors. You should follow Gree‘s requirement to add qualified lubricant of the specified trademark and ensure properness of fill amount.
  • Page 164 Ultra Heat GMV VRF Technical Service Manual_Heat Recovery Serial MAINTENANCE Step 13: Vacuum-pump. After lubricant is added, keep on extracting air through a vacuum pump till the internal pressure reaches the absolute pressure 0kgf/cm2 and the pressure gauge reads -1 kgf/cm2. This is to ensure that moistures inside the pipeline system are completely vaporized.

  • Page 165: Cautions On Compressor Drive Board And Pfc Board Replacement

    Ultra Heat GMV VRF Technical Service Manual_Heat Recovery Serial MAINTENANCE Install the electric box and connect various parts to the electric box by referring to the marks made beforehand and the wiring diagram on the back of the box. Wire the compressors and corresponding electric heating belts.
  • Page 166 Ultra Heat GMV VRF Technical Service Manual_Heat Recovery Serial MAINTENANCE Drive board (3) Disconnect all lines of the PFC board, including: communication line between the PFC and the drive; output 18 and 7.5 VDC connecting with compressor drive board; anode P; cathode N; output 450 VDC;...
  • Page 167 Ultra Heat GMV VRF Technical Service Manual_Heat Recovery Serial MAINTENANCE PFC board Drive board...
  • Page 168 Ultra Heat GMV VRF Technical Service Manual_Heat Recovery Serial MAINTENANCE (4) Loosen the screws on the compressor drive board and PFC board, as shown in the figure below: PFC board Drive board...
  • Page 169 Ultra Heat GMV VRF Technical Service Manual_Heat Recovery Serial MAINTENANCE (5) Replace the compressor drive board and PFC board. Before the replacement, apply some silicone tape onto the IPM module. (6) Install a new compressor drive, screw and wire it. PFC board...

  • Page 170: Assembling And Disassembling Key Parts Of Odus

    Ultra Heat GMV VRF Technical Service Manual_Heat Recovery Serial MAINTENANCE Drive board 4 ASSEMBLING AND DISASSEMBLING KEY PARTS OF ODUS Compressor Precondition: No refrigerant exists in the pipeline system and the power supply has been disconnected Step Diagram Operation Procedure ●Use a screwdriver to unscrew the upper and lower front panels.
  • Page 171 Ultra Heat GMV VRF Technical Service Manual_Heat Recovery Serial MAINTENANCE ●Disconnect internal and external connecting lines of the electric box. 2. Remove the electric box. ●Protect the internal parts during the disassembly. ●Remove the sound-proof sponge from the compressor. 3. Disconnect the power ●Use a screwdriver to unscrew the power line.
  • Page 172 Ultra Heat GMV VRF Technical Service Manual_Heat Recovery Serial MAINTENANCE ●Remove the compressor from the chassis. 6. Remove the compressor. ●Put the compressor in a proper position. ●Use a wrench to screw the nuts on the 7. Install a new compressor compressor.
  • Page 173 Ultra Heat GMV VRF Technical Service Manual_Heat Recovery Serial MAINTENANCE ●Put the electric box back to original position 10. Fix and wire the electric and screw it. box. ●Connect all lines. ●Check various parts and connecting lines. 11. Check and then install ●If no problem is found, hook the front panels the front panels.
  • Page 174 Ultra Heat GMV VRF Technical Service Manual_Heat Recovery Serial MAINTENANCE Use a screwdriver to unscrew accessories of the four-way valve. Remove the accessories. ●Heat the connecting pipes of the four-way valve by acetylene welding and then remove 3.Disassemble the four-way the pipes.
  • Page 175 Ultra Heat GMV VRF Technical Service Manual_Heat Recovery Serial MAINTENANCE ●Check various parts and connecting lines. 7. Check and install the front ●If no problem is found, hook the front panels panels. and tighten the screws. Electric expansion valve Precondition: No refrigerant exists in the pipeline system and the power supply has been disconnected Step Diagram Operation Procedure...
  • Page 176 Ultra Heat GMV VRF Technical Service Manual_Heat Recovery Serial MAINTENANCE 4. Remove the electric ●Remove the electric expansion valve. expansion valve. ●Weld the connecting pipes with the electric expansion valve. ●Before welding, cover the valve with wet cloth. ●During welding, charge nitrogen into the pipes. 5.
  • Page 177 Ultra Heat GMV VRF Technical Service Manual_Heat Recovery Serial MAINTENANCE Oil separator Precondition: No refrigerant exists in the pipeline system and the power supply has been disconnected. Step Diagram Operation Procedure ●Use a screwdriver to unscrew the upper and lower front panels. 1.
  • Page 178 Ultra Heat GMV VRF Technical Service Manual_Heat Recovery Serial MAINTENANCE ●Weld the four pipe joints with the oil separator. During welding, charge nitrogen into the pipes. The pressure should be controlled within 5. Install a new oil 0.5± 0.1 kgf/cm (relative pressure).
  • Page 179 Ultra Heat GMV VRF Technical Service Manual_Heat Recovery Serial MAINTENANCE ●Disconnect internal and external connecting lines of the electric box. 2. Remove the electric box. ●Protect the internal parts during the disassembly. ●Heat the connecting pipes of the gas/liquid separator by acetylene welding and then 3.
  • Page 180 Ultra Heat GMV VRF Technical Service Manual_Heat Recovery Serial MAINTENANCE ●Put the electric box back to original position 6. Fix and wire the electric and screw it. box. ●Connect all lines. ●Check various parts and connecting lines. 7. Check and install the front ●If no problem is found, hook the front panels panels.
  • Page 181 Ultra Heat GMV VRF Technical Service Manual_Heat Recovery Serial MAINTENANCE ●Heat the connecting pipes of the heat exchanging board by acetylene welding and then remove the pipes. 3. Disassemble the heat Note: Avoid nearby parts from being burnt exchanging board. during welding.

  • Page 182: Unit Maintenance

    (5) Turn the power switch on 8 hours beforehand to pre-heat the outdoor compressor crankcase before the unit is restarted after being in idle status for a long time. (6) Check ODU installation. If an abnormality is found, please contact GREE‘s maintenance center. 5.4 Post-Season Maintenance (1) Disconnect the general power supply.

  • Page 183: Part 4 Appendixes

    Ultra Heat GMV VRF Technical Service Manual_Heat Recovery Serial MAINTENANCE PART 4 APPENDIXES 1 MINUTES ABOUT A DEBUG SOLUTION CONFIRMATION MEETING Confirming air conditioner debug solution to the *** project Theme: *** Time: *** Place: *** Participants: *** Contents: *** 2 VISUAL INSPECTION CHECKLIST OF THE DEBUG SYSTEM Visual inspection checklist of *** air conditioning equipment Item...

  • Page 184: Debug Parameter Record List

    Ultra Heat GMV VRF Technical Service Manual_Heat Recovery Serial MAINTENANCE 3 DEBUG PARAMETER RECORD LIST Project Unit model name Debugged Date General IDU rated Total length of ODU rated capacity (kW) capacity (kW) refrigerant pipes (m) Fill amount of Maximum fall of IDUs (m) refrigerant (kg) Debug state: Refrigerating...

  • Page 185: Common Parameter Lists

    Ultra Heat GMV VRF Technical Service Manual_Heat Recovery Serial MAINTENANCE 4 COMMON PARAMETER LISTS 4.1 R410A Refrigerant Pressure / Saturation Temperature List Corresponding Corresponding Corresponding Temperature Temperature Temperature saturation pressure saturation pressure saturation pressure ℉ ℉ ℉ ° C ° C °...
  • Page 186 Ultra Heat GMV VRF Technical Service Manual_Heat Recovery Serial MAINTENANCE 4.2 Resistance / Temperature Lists of Temperature Sensors 4.2.1 Voltage list of 15 kΩ temperature sensors (including ODU and IDU temperature sensors) Voltage Voltage Voltage ℉ kΩ ℉ kΩ ℉ kΩ...
  • Page 187 Ultra Heat GMV VRF Technical Service Manual_Heat Recovery Serial MAINTENANCE 57.2 24.73 1.246 2.205 2.877 0.391 3.216 23.6 1.282 168.8 2.133 2.889 276.8 0.382 3.218 60.8 22.53 1.319 170.6 2.064 2.901 278.6 0.372 3.22 62.6 21.51 1.356 172.4 1.997 2.912 280.4 0.363 3.222...
  • Page 188 Ultra Heat GMV VRF Technical Service Manual_Heat Recovery Serial MAINTENANCE 4.2.2 Voltage list of 20 kΩ pipeline temperature sensors (including temperature sensors for defroster, sub-cooler, gas/liquid separator, and IDU suction and discharge pipes) Voltage Voltage Voltage ℉ ℉ ℉ kΩ kΩ...
  • Page 189 Ultra Heat GMV VRF Technical Service Manual_Heat Recovery Serial MAINTENANCE 39.2 53.46 0.898 269.6 0.5627 3.21 154.4 3.729 2.781 50.87 0.931 271.4 0.5487 3.212 156.2 3.603 2.796 42.8 48.42 0.965 273.2 0.5351 3.214 3.481 2.811 44.6 46.11 0.998 0.5219 3.216 159.8 3.364 2.825...
  • Page 190 Ultra Heat GMV VRF Technical Service Manual_Heat Recovery Serial MAINTENANCE 4.2.3 Voltage list of 50 kΩ discharge temperature sensors (including discharge air temperature sensor) Voltage Voltage Voltage ℉ kΩ ℉ kΩ ℉ kΩ ° C ° C ° C 87.8 37.958 0.688 197.6...
  • Page 191 Ultra Heat GMV VRF Technical Service Manual_Heat Recovery Serial MAINTENANCE 126.17 0.242 260.6 1.5996 2.845 150.8 9.8269 1.664 42.8 119.08 0.256 262.4 1.5602 2.855 152.6 9.4896 1.693 44.6 113.37 0.267 264.2 1.522 2.864 154.4 9.1655 1.722 46.4 107.96 0.28 1.485 2.873 156.2 8.9542...
  • Page 192 Ultra Heat GMV VRF Technical Service Manual_Heat Recovery Serial MAINTENANCE 4.3 Voltage / Pressure Lists of Pressure Sensors 4.3.1 High-pressure/ middle-pressure sensor (R410A) Temperature Absolute pressure Voltage Temperature Absolute pressure Voltage ℉ ℉ ° C ° C 25.5 0.102 60.8 1300 188.5 -38.2...
  • Page 193 Ultra Heat GMV VRF Technical Service Manual_Heat Recovery Serial MAINTENANCE 21.2 95.8 0.619 3083 3.201 99.2 0.644 123.8 3154 457.3 3.277 24.8 102.5 0.668 125.6 3226 467.8 3.353 26.6 105.9 0.693 127.4 3300 478.5 3.432 28.4 109.3 0.718 129.2 3374 489.2 3.511 30.2...
  • Page 194 Ultra Heat GMV VRF Technical Service Manual_Heat Recovery Serial MAINTENANCE 4.3.2 Low-pressure sensor (R410A) Temperature Absolute pressure Voltage Temperature Absolute pressure Voltage ℉ ℉ ° C ° C 0.369 72.8 1.301 -92.2 0.373 75.4 1.337 -90.4 0.377 10.4 1.373 -88.6 0.383 12.2 80.9...
  • Page 195 Ultra Heat GMV VRF Technical Service Manual_Heat Recovery Serial MAINTENANCE 31.9 0.737 69.8 1493 216.5 3.283 -29.2 33.4 0.757 71.6 1535 222.6 3.367 -27.4 34.8 0.777 73.4 1577 228.7 3.451 -25.6 36.3 0.797 75.2 1620 234.9 3.537 -23.8 37.8 0.819 1664 241.3 3.625...

  • Page 196: Exploded Views And Spare Part List

    Ultra Heat GMV VRF Technical Service Manual_Heat Recovery Serial MAINTENANCE 5 EXPLODED VIEWS AND SPARE PART LIST 5.1 GMV-VQ72W/A-F(U)、GMV-VQ96W/A-F(U) 1) GMV-VQ96W/A-F(U) Name of Part Part Code Quantity Name of Part Part Code Quantity Rear Grill 01574100002 Main Board 300027000315 Coping 01264100006 Main Board 300027000198...
  • Page 197 Ultra Heat GMV VRF Technical Service Manual_Heat Recovery Serial MAINTENANCE One way Valve 04324001 Pressure sensor 32218000008 Gas-liquid Pressure Sensor(High 035027000007 322101037 Separator Pressure) Accumulator 07424100036 Pressure Sensor 32218000009 Electric Expand Valve One Way Valve 07130101 4304413202 Fitting Electric Expand Valve Strainer A 07211191 4304413204...
  • Page 198 Ultra Heat GMV VRF Technical Service Manual_Heat Recovery Serial MAINTENANCE One Way Valve 07335210 Electric Box Assy 100002003754 Nozzle for Adding Reactor 450004060002 061200101 Freon AC Contactor 441007060001 Note: Above data is subject to change without notice, please refer the SP in global service website. 2) GMV-VQ72W/A-F(U) Name of Part Part Code...
  • Page 199 Ultra Heat GMV VRF Technical Service Manual_Heat Recovery Serial MAINTENANCE Magnet Coil Electromagnetic 43044100144 (electromagnetic 4304000470 Valve valve) Electromagnetic 43000072 Magnet Coil 4304000486 Valve Magnet Coil Cut off Valve 1/4 071302398 (electromagnetic 4304000462 valve) Magnet Coil Cut off Valve 07334100011 (electromagnetic 4304000458 valve)
  • Page 200 Ultra Heat GMV VRF Technical Service Manual_Heat Recovery Serial MAINTENANCE 5.2 NCHS1B(U) NCHS1B(U) Name of part Product Code EN04001120 Part code Quantity Coping '01264100055P Terminal Board '420111451 Pinboard '30270000002 Terminal Board '42018000026 Electromagnetic Valve '43000073 Chassis '01284100129P Seal plate '01494100015P Side Plate '01314100096P Hook...
  • Page 201 Ultra Heat GMV VRF Technical Service Manual_Heat Recovery Serial MAINTENANCE Electromagnetic Valve '43000054 Seal plate '01494100014P Electric Expand Valve Fitting '4304413205 Magnet Coil '4304000428 ‗4304000447 Magnet Coil ‗4304000448 Magnet Coil Tube sensor '3900012128G Temperature Sensor '390000372G Note: Above data is subject to change without notice, please refer the SP in global service website.
  • Page 202 Ultra Heat GMV VRF Technical Service Manual_Heat Recovery Serial MAINTENANCE NCHS2B(U) Name of part Product Code EN01600010 Part code Quantity Top Cover '012020060141P Terminal Board '422000000014 Terminal Board '42018000026 Pinboard '300023000009 Chassis '012008000028P ‗017055000063P Water Tray Sub_Assy Electromagnetic Valve '43000073 Strainer '07415200002 Electromagnetic Valve...
  • Page 203 Ultra Heat GMV VRF Technical Service Manual_Heat Recovery Serial MAINTENANCE 5.4 NCHS4B(U)
  • Page 204 Ultra Heat GMV VRF Technical Service Manual_Heat Recovery Serial MAINTENANCE NCHS4B(U) Name of part Product Code EN04001130 Part code Quantity Coping '01264100058P Terminal Board '420111451 Terminal Board '42018000026 Pinboard '30270000002 Chassis '01284100135P Water Tray Sub-Assy '01284100147P Electromagnetic Valve '43000073 Strainer '07415200002 Electromagnetic Valve '43000054...
  • Page 205 Ultra Heat GMV VRF Technical Service Manual_Heat Recovery Serial MAINTENANCE 5.5 NCHS8B(U)
  • Page 206 Ultra Heat GMV VRF Technical Service Manual_Heat Recovery Serial MAINTENANCE NCHS8B(U) Name of part Product Code EN04001140 Part code Quantity Coping '012020060142P Terminal Board '422000000014 Terminal Board '42018000026 Pinboard '300023000009 Chassis '01284100142P ‗01284100153P Water Tray Sub_Assy Electromagnetic Valve '43000073 Strainer '07415200002 Electromagnetic Valve '43000054...
  • Page 207 Jf00303410...

This manual is also suitable for:

Ultra heat gmv-vq72w/a-fUltra heat gmv-vq72w/a-fuUltra heat gmv-vq96w/a-fUltra heat gmv-vq96w/a-fuCn851w1730Cn851w1740

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