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Ultra Heat GMV VRF Technical Service Manual_Heat Recovery Serial MAINTENANCE

154

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.

Summary of Contents for Ultra Heat GMV-VQ72W/A-F

Page 1: ...Ultra Heat GMV Multi VRF TECHNICAL SERVICE MANUAL R410A Heat Recovery Series ...

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: ...LACE SELECTION FOR INSTALLING ODU 31 2 ODU DIMENSIONS AND INSTALLATION HOLE SIZE 31 PART 4 REQUIREMENTS ON FOUNDATION INSTALLATION 39 1 ODU FOUNDATION 39 2 ODU FIXING 40 3 VIBRATION REDUCTIONS FOR ODU 40 PART 5 PIPING CONNECTION 41 1 SCHEMATIC DIAGRAM OF PIPING CONNECTION 41 2 SCHEMATIC DIAGRAM OF PIPING SEQUENCE 41 3 ALLOWABLE PIPE LENGTH AND DROP HEIGHT AMONG IDU AND ODU 42 4 CONNECTION PIPE AMO...

Page 4: ...LURE CODE TABLE 117 2 ODU LEDS TABLE 121 PART 2 EXCEPTIONS AND TROUBLESHOOTING 123 1 HOW TO LOCATE A FAULTY IDU PROMPTLY 123 2 EXCEPTIONS ANALYZING AND TROUBLESHOOTING 124 PART 3 KEY PARTS MAINTENANCE 143 1 CAUTIONS ON CONTROLLER REPLACEMENT 143 2 COMPRESSOR REPLACEMENT AND CAUTIONS 146 3 CAUTIONS ON COMPRESSOR DRIVE BOARD AND PFC BOARD REPLACEMENT 161 4 ASSEMBLING AND DISASSEMBLING KEY PARTS OF O...

Page 5: ...ccur SAFTY PRECAUTIONS To prevent injury to the user or other people and property damage the following instructions must be followed Incorrect operation due to ignoring instruction will cause harm or damage The seriousness is classified by the following indications This is the safety alert symbol It is used to alert you to potential personal injury hazards Obey all safety messages that follow this...

Page 6: ...se flammable gas or combustibles near the air conditioner There is risk of fire or failure of product Use the correctly rated breaker or fuse There is risk of fire or electric shock Prepare for strong wind or earthquake and install the unit at the specified place Improper installation may cause the unit to topple and result in injury Do not install the product on a defective installation stand It ...

Page 7: ...e a dedicated outlet for this appliance There is risk of fire or electrical shock Be cautious that water could not enter the product There is risk of fire electric shock or product damage Do not touch the power switch with wet hands There is risk of fire electric shock explosion or injury When the product is soaked flooded or submerged contact an Authorized Service Center There is risk of fire or ...

Page 8: ...t exchanger is very sharp It can cause the injury such as cutting the finger Also the damaged fin may result in degradation of capacity When installing the unit in a hospital communication station or similar place provide sufficient protection against noise The inverter equipment private power generator high frequency medical equipment or radio communication equipment may cause the air conditioner...

Page 9: ... Only one person should not carry the product if it weighs more than 44lbs 20kg Some products use PP bands for packaging Do not use any PP bands for a means of transportation It is dangerous Do not touch the heat exchanger fins Doing so may cut your fingers When transporting the outdoor unit suspend it at the specified positions on the unit base Also support the outdoor unit at four points so that...

Page 10: ...Ultra Heat GMV VRF Technical Service Manual_Heat Recovery Serial UNIT INTRODUCTION 6 CHAPTER 1 INTRODUCTION TO BASIC FEATURES OF UNITS ...

Page 11: ...upply and air return of the IDU is performed to adjust the indoor temperature and humidity When an IDU is operating in heating mode all four way valves in the ODU module are switched into energized status The outdoor heat exchange serves as the system evaporator and the heat exchanger of the IDU serves as the system condenser The circulation of air supply and air return of the IDU is performed to ...

Page 12: ...pe Maintains a proper oil temperature in the compressor when the compressor is in standby status ensuring the reliability during compressor startup 3 Exhaust pipe temperature sensor of compressor Detects a compressor s exhaust gas temperature for compressor control and protection 4 High pressure circuit breaker Protects a compressor by sending feedback signal to stop the system when the compressor...

Page 13: ...b cooler Detects gas temperature of sub cooler 21 Compensate vapor valve Used for compensating vapor for second compression 22 Sub cooling valve Used for providing with sub cooling liquid 23 Low pressure sensor Detects system low pressure to avoid extra low operating pressure 24 Gas liquid separator Separate gas and liquid to prevent the system from running when the refrigerant flows back to the c...

Page 14: ...es refrigerant during system running 42 Gas bypass valve Make sure pressure of the system is balanced 43 Pressure balanced valve Ensures success startup of compressor 44 Varying capacity valve 1 To make the compressor turn with double cylinders 45 Varying capacity valve 2 To make the compressor turn with triple cylinders 46 Oil balanced valve 1 Make sure oil of the system is balanced 47 Oil balanc...

Page 15: ...mperature sensor of sub cooler Detects outflow gas temperature of sub cooler 6 Gas bypass valve Make sure pressure of the system is balanced 7 Capillary tube Supports flow regulating and pressure reduction 8 High pressure gas valve Controls the refrigerant flow when IDU is heating For example 8a is the high pressure gas valve of IDU1 9 Gas bypass valve Make sure pressure of the system is balanced ...

Page 16: ...kW 6 64 8 88 18 03 Sound Pressure Level dB A 60 60 62 Power Supply 208 230V 3 60HZ Compressor Type Inverter Rotary Inverter Rotary Inverter Rotary Number N 2 2 2 2 Motor Output kW 5 83 2 5 83 2 5 83 2 5 83 2 Starting Method Inverter Inverter Inverter Operating Range 10 100 10 100 Refrigeration Oil Brand FV50S FV50S FV50S Oil Charge Compressor L 1 35 2 1 35 2 1 35 2 1 35 2 Oil Separate Tank L 6 6 6...

Page 17: ...1775 1420 840 1775 1420 840 1775 1420 840 1775 in 56 33 69 7 8 56 33 69 7 8 56 33 69 7 8 56 33 69 7 8 Weight Net Weight kg 408 408 408 408 lbs 899 899 899 899 Gross Weight kg 423 423 423 423 lbs 933 933 933 933 Maximum Quantity of Connected Indoor Unit unit 12 17 34 Protection Devices High Pressure Protection High pressure sensor high pressure switch Compressor Fan Over current protection over hea...

Page 18: ...rms which can connect different kinds of lower branches Each branch of the C H Mode Exchanger can connect 8 indoor units at the most and the total capacity should be no more than 14kw 2 C H Mode Exchanger provides multiple branches used for connection lower indoor units It s convenient for installation leakage detection and maintenance 3 C H Mode Exchanger is supplied power independently which con...

Page 19: ... In 7 8 7 8 1 1 8 1 1 8 Gas High pressure mm 15 9 19 05 19 05 22 2 In 5 8 3 4 3 4 7 8 Indoor Unit Piping Connection Liquid mm 9 52 9 52 9 52 9 52 In 3 8 3 8 3 8 3 8 Gas mm 15 9 15 9 15 9 15 9 In 5 8 5 8 5 8 5 8 3 3 Combination Mode Single Model GMV VQ192WM A F U Combined Model GMV VQ96W A F U GMV VQ96W A F U No matter how many outdoor units there are the total rated capacity of indoor units must n...

Page 20: ...ge and circuit breaker must be selected based on the above parameters and in compliance with local safety requirements If there is conflict between above parameters and national requirements please contact the manufacture promptly If power cable wire gauge and circuit breaker is out of the above design range fire hazard may occur 4 2 Circuit Diagram of ODU The actual wiring should always refer to ...

Page 21: ...assic wired controller Wired controller XK46 Applicable to the air Cassette Floor Ceiling Wall Mounted indoor unit duct type indoor unit standard Wired controller for hotel Wired controller XK79 With the access control function Color screen wired controller Wired controller XK55 Smart zone controller CE52 24 F C Applicable for units that support CAN bus communication technology 4G IE60 33 CF2 Debu...

Page 22: ...aintenance Pipe connection diagram of outdoor module 2 Each ODU system can be connected to multiple IDUs Detailed information about the number of units to be connected and capacity ranges is shown in the following table Model Maximum Number of Connected IDUs units Capacity Range of Connected IDU kBtu h Minimum Capacity Maximum Capacity GMV VQ72W A F U 12 36 0 97 2 GMV VQ96W A F U 17 48 0 129 6 GMV...

Page 23: ...lculated directly based on the size of the air conditioning space The unit of refrigerant concentration is 1 kg m or 1lb m Method for calculating the maximum concentration of refrigerant 1 Calculate the refrigerant charge quantity of each system Charge quantity of an ODU upon delivery for the system consisting of multiple modules in parallel the accumulative charge quantity of modules upon deliver...

Page 24: ... over 6 6ft from the floor Wall mounted type Cassette type Adoption of ventilation system Choose ordinary ventilation system or building ventilation system Limitation in piping work Prepare for earthquake and thermal stress 8 UNIT OPERATING TEMPERATURE Cooling Ambient temperature 10º C 14º F 52º C 125 6º F Heating Ambient temperature 30º C 22º F 24º C 75 2º F Heat recovery operation Ambient temper...

Page 25: ...Ultra Heat GMV VRF Technical Service Manual_Heat Recovery Serial UNIT INTRODUCTION 21 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 22 CHAPTER 2 INSTALLATION ...

Page 27: ...ssor 2 Nitrogen is not filled into the refrigerant pipe or insufficient Nitrogen is filled before welding Pipes are more likely to be blocked air conditioning performance is reduced compressor wear is increased or even hinder the normal operation of the system and burn the compressor 3 The vacuum degree in the refrigerant pipe is insufficient The refrigeration performance is reduced The system fai...

Page 28: ...ng performance 17 The ODU is improperly installed The ODU is difficult to be maintained unit exhaust is not smooth which reduces the heat exchanging performance or even prevent the system from normal operation in addition the cold and hot air for heat exchange and the noise may annoy people in surrounding areas 18 Power cables are incorrectly provided Unit components may be damaged and potential s...

Page 29: ...om of the beam as possible If pipes meet one another at the same elevation process based on the following principles 1 Drain pipes enjoy the highest priority Air ducts and pressure pipes should leave places for gravity pipes 2 Air ducts and small pipes should leave places for major pipes 3 3 Requirements for Cooperation with Electric After the capacity of air conditioning unit is determined check ...

Page 30: ...Ultra Heat GMV VRF Technical Service Manual_Heat Recovery Serial INSTALLATION 26 ...

Page 31: ...r users The more the excess is the lower the adjustment capacity of an air conditioning unit will be The difference of level between an ODU and an IDU and that between IDUs must be set within the designed range 2 The pipe diameter and manifold type in the cooling system must meet relevant technical specifications 3 The drainage method of unit condensate water must be reasonable the pipeline slope ...

Page 32: ...V VRF Technical Service Manual_Heat Recovery Serial INSTALLATION 28 5 CONSTRUCTION ORGANIZATION PROCESS Above process is a general operation process which can be adjusted in practice according to local requirements ...

Page 33: ... R410A Refrigeration System Outer diameter mm inch Wall thickness mm Type Φ6 35 1 4 0 8 0 Φ9 52 3 8 0 8 0 Φ12 70 1 2 0 8 0 Φ15 9 5 8 1 0 0 Φ19 05 3 4 1 0 0 Φ22 2 7 8 1 2 1 2H Φ25 40 1 1 1 2 1 2H Φ28 60 9 8 1 2 1 2H Φ31 80 5 4 1 3 1 2H Φ34 90 11 8 1 3 1 2H Φ38 10 12 8 1 5 1 2H Φ41 30 13 8 1 5 1 2H Φ44 5 7 4 1 5 1 2H Φ51 4 7 4 1 5 1 2H Φ54 1 17 8 1 5 1 2H After the inner part of the copper pipe is c...

Page 34: ...d in places with intense magnetic field or strong interference it is necessary to use shielded wire NOTE All of the selected communication wire must be consistent with local laws and regulations 2 3 Power Cable Only copper conductors can be used as power cables The copper conductors must meet relevant national standard and satisfy the carrying capacity of unit 2 4 Other Requirements Properties of ...

Page 35: ... the ODU with excellent capacity and low noise is preferred in addition ODU should be installed in outdoor spaces instead of in bedrooms studies or meeting rooms In commercial areas ODU should be installed far away from offices 2 ODU DIMENSIONS AND INSTALLATION HOLE SIZE External and installation dimensions of GMV VQ72W A F U and GMV VQ96W A F U 3 INSTALLATION SPACE REQUIREMENT FOR ODU 1 If all si...

Page 36: ...o obstructions in four directions keep the distance between the unit top and wall at least 1500mm 59inch or above See Fig 1 When space is limited within 1500mm 59inch or the unit is not set in an open space air return pipe is required to be installed in order to keep good ventilation See Fig 2 Fig 1 Fig 2 2 Space dimension for multiple module unit For keeping good ventilation make sure there are n...

Page 37: ...Ultra Heat GMV VRF Technical Service Manual_Heat Recovery Serial INSTALLATION 33 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 34 4 Anti monsoon installation requirements for unit connecting exhaust duct 5 Considering snow in outdoor unit installation ...

Page 39: ... and engineering requirement and is installed properly according to the engineering standards c Based on the unit dimensions and the size of steel plate ventilating duct prepare materials such as canvas casing tin foil steel bar and tapping screw as well as tools such as hand operated electric drill air screw driver and screwdriver 3 Basic operation of connecting an ODU to static pressure ventilat...

Page 40: ...g duct 1 Take out the grille from the top of the top case component Use the prepared canvas casing inside out 4 to cover the surroundings over the top of the unit Keep the top of canvas casing 4 30 to 50 mm higher over the top of the unit b Use a steel bar to press tightly the canvas casing 4 around the top case of the unit Use a hand operated electric drill to drill holes and fasten the canvas ca...

Page 41: ...e ventilating duct otherwise the air volume especially the unit operating performance will be affected For method 2 since drills are required on the top case the powder coated protective layer on the top case will be damaged As a result the anti corrosion performance of the unit top case will be reduced Step 1 Step 2 Step 3 Step 4 1 When the effective area of air intake is less than 70 of the tota...

Page 42: ...touch heat exchanger fins with your bare hands Otherwise you may get a cut in your hands Tear plastic packaging bag and scrap it so that children cannot play with it Otherwise plastic packaging bag may suffocate children to death When carrying in Outdoor Unit be sure to support it at four points Carrying in and lifting with 3 point support may make Outdoor Unit unstable resulting in a fall Use 2 b...

Page 43: ...atten the surface of the foundation Sharp edges must be chamfered When the foundation is built on a concrete floor crushed stones are not required But the foundation surface must be roughened Clear the oil stains crushed stones dirt and water in the reserved bolt hole of the foundation and install a temporary cover before installing bolts Build a drainage ditch around the foundation to discharge t...

Page 44: ... bottom side of the outdoor unit Base Pan before fixing the bolt It may cause the unstable state of the outdoor settlement and may cause freezing of the heat exchanger resulting in abnormal operations Be sure to remove the MDF wood support of the bottom side of the outdoor unit before welding Not removing MDF causes hazard of fire during welding 2 ODU FIXING Fix the ODU to the foundation with four...

Page 45: ...e exchanger Indoor unit 1 Indoor unit 2 Indoor unit 3 Indoor unit 4 Indoor unit 5 Indoor unit 6 Connection pipe between mode exchanger and indoor units Connection pipe between indoor branchs Connection pipe between indoor branch and mode exchanger Connection pipe between mode exchanger and indoor branch Connection pipe between indoor branchs Connection pipe between indoor branchs Connection pipe b...

Page 46: ...g one branch the length is 1m 39 3 8 inch when using N branches the length is N meters R410A Refrigerant System Allowable Value m feet Fitting Pipe Total length actual length of fitting pipe 1000 3280 3 4 L1 L2 L3 L4 L10 A11 A12 D21 D22 Length of farthest fitting pipe m feet Actual length 165 541 1 4 L1 L7 L8 L10 D22 Equivalent length 190 623 1 4 Difference between the pipe length from the first b...

Page 47: ...rest IDU L12 L11 40m 131 1 4feet 2 When the outdoor unit is at upper side and height difference is more than 50m please consult company for the related technical requirement 3 When the maximum length of the main pipe from ODU to the first branch of IDU is 50m 164 ft then adjust the pipe size Total rated capacity of ODU C Btu h Pipe between outdoor unit and the first indoor branch Low pressure gas ...

Page 48: ... 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: ...3 4 GMV VQ96W A F U Φ28 6 1 1 8 Φ12 7 1 2 Φ19 05 3 4 For multi module L pipe between the terminal outdoor branch and the first indoor branch Basic module Pipe between outdoor unit and the first indoor branch Low pressure gas pipe mm inch Liquid pipe mm inch High pressure gas pipe mm inch GMV VQ192WM A F U Φ31 8 1 1 4 Φ15 9 5 8 Φ28 6 1 1 8 5 2 ODU pipe size selection for multi module system Pipe si...

Page 50: ...Liquid pipe mm inch High pressure gas pipe mm inch X 17100 Φ12 7 1 2 Φ6 35 1 4 Φ12 7 1 2 17100 X 48500 Φ15 9 5 8 Φ9 52 3 8 Φ12 7 1 2 48500 X 72000 Φ19 05 3 4 Φ9 52 3 8 Φ15 9 5 8 72000 X 96000 Φ22 2 7 8 Φ9 52 3 8 Φ19 05 3 4 96000 X 120000 Φ28 6 1 1 8 Φ12 7 1 2 Φ22 2 7 8 120000 X 144000 Φ28 6 1 1 8 Φ12 7 1 2 Φ22 2 7 8 144000 X 168000 Φ28 6 1 1 8 Φ15 9 5 8 Φ22 2 7 8 168000 X 216000 Φ28 6 1 1 8 Φ15 9 ...

Page 51: ... 4 17100 C 48500 Φ15 9 5 8 Φ9 52 3 8 5 9 Pipe size between indoor branches I Rated capacity of indoor units X Btu h Size of connection pipe between indoor branch and indoor unit Gas pipe mm inch Liquid pipe mm inch X 9500 Φ9 52 3 8 Φ6 35 1 4 9500 X 17100 Φ12 7 1 2 Φ6 35 1 4 17100 X 48500 Φ15 9 5 8 Φ9 52 3 8 5 10 Connection method when capacity of indoor unit exceeds 48500 Btu h When connecting to ...

Page 52: ...frigerant system Total rated capacity of downstream indoor units X Btu h Model Y type branch 48500 X 96000 FQ01B A 2 Pipe size between mode exchanger and downstream and indoor unit m Rated capacity of indoor units X Btu h Size of connection pipe between indoor branch and indoor unit Gas pipe mm inch Liquid pipe mm inch 48500 X 72000 Φ19 05 3 4 Φ9 52 3 8 72000 X 96000 Φ22 2 7 8 Φ9 52 3 8 ...

Page 53: ...eering with minimum pipe length and bends In this way the performance of the unit can be maximized 3 The refrigerant pipe cannot affect air discharge and return of internal units The minimum distance between the refrigerant pipe with an insulation layer and the air return box is 300 mm 11 8inch If the air return or manhole is at the right lower part of the unit the minimum distance is 150 mm 5 9in...

Page 54: ...with a sealing cap or adhesive tape 1 2 2 Pipe cleaning Cleaning with a piece of silk cloth wrap a thin steel wire with a piece of clean silk cloth Crumple the cloth into a lump with diameter larger than the pipe calibre Apply several drops of chlorylene to the cloth Push the cloth in from one end of the pipe and pull out from the other end Every time the cloth is pulled out remove the dust and su...

Page 55: ...must be intact without any burr crack or wrinkle Requirements on pipe flaring are as follows 1 End faces of the copper pipe are smooth 2 Burrs and turn ups inside the pipe opening must be cleared 3 Install flaring nuts in the pipe before pipe flaring 4 The flared opening must be concentric with the main pipe No eccentricity is allowed 5 Put the pipe into the root of the pipe expander 6 Longitudina...

Page 56: ...f support The foot pedal must be tightened securely with the ladder Do not perform operations on the top of the ladder 1 3 3 Shaping and fixing of pipes When installing refrigerant pipes ensure that the directions and branches are correct with minimum length Use minimum number of braze welding junctions and elbows Alignment and insulation after installation cannot affect the pipe location and elev...

Page 57: ...inimum Insertion Depth D A Gap between Pipes mm inch mm inch mm inch 6 35 1 4 6 0 24 0 05 0 21 0 002 0 008 9 52 3 8 7 0 28 12 7 1 2 15 8 5 8 8 0 32 0 05 0 27 0 002 0 01 19 05 3 4 10 0 39 22 2 7 8 25 4 1 28 6 1 1 8 12 0 47 0 05 0 30 0 002 0 012 31 8 1 1 4 38 1 1 1 2 19 0 75 0 15 0 35 0 006 0 014 44 5 1 3 4 1 3 4 3 Bell socket welding The bell socket welding is another form of socket welding It uses...

Page 58: ...s close to the IDU to reduce impact on refrigerant assignment by IDU branches 2 The manifold must be that specified by the manufacture and match with the devices 3 Ensure that the manifold model is correct 4 Manifolds can be laid in the following ways 1 Horizontal installation The three ports must be on the same level The shaping size and assembly angle cannot be changed 2 Vertical installation Th...

Page 59: ...hes of a manifold must be laid parallel and cannot be wrapped in superimposed mode 6 The liquid pipe and gas pipe must have the same length and be laid in the same route 7 The Y type manifold has an attached pipe used to adjust the diameter of different pipes If the pipe size on site does not match the size of the manifold junction use the pipe cutter to cut at the middle of the pipe and remove bu...

Page 60: ... to the entire refrigerant pipe system after the construction is finished There must be a secure distance between pipes Pipes in different types must be fixed separately When all of the pipes of indoor unit finish welding dry nitrogen must be used to blow and clean the pipes Otherwise the remaining substance in pipeline will cause blockage or leakage to the system e g electronic expansion valve wh...

Page 61: ...ecting three way pipes the two way straight pipes must be laid on the same slope as shown in the following figures 5 The condensate water pipe cannot be tied with the refrigerant pipe 6 A ventilation hole must be provided on the top of the drain pipe to ensure smoother discharge of condensate water 7 After pipes are connected perform a test with some water and another test with full water in the p...

Page 62: ...is high and outdoor air resorption may be caused by negative suction pressure provide a U type drain trap at the water outlet side of each IDU as shown in the following figure Install drain trap connectors as shown in the following figure Install a drain trap connector for each unit The drain trap connector shall be installed in a way that facilitates trap cleaning 5 During condensate water pipe i...

Page 63: ... insulation materials to prevent leakage d The connection between the drain pipe and that of the IDU is shown in the following figure e Apply insulation materials to the condensate water pipe joints to prevent dewing d Insulation for connection between the drain pipe and that of the IDU is shown in the following figure 2 Drain Pipe Installation for IDU a Use pipe clips instead of applying glue to ...

Page 64: ... IDU must be higher than the header pipe 3 The diameter of the header pipe must be determined on the number and capacity of IDUs 4 When installing pipe start from the highest point of the pipe and follow the specified inclination to smoothly discharge condensate water 5 Connect branches to the main pipe from the upper part or side instead of lower part of the main pipe 6 Insulate all condensate wa...

Page 65: ...of the indoor outdoor unit as shown in the following figure 3 2 Insulation for the Condensate Water Pipe System 1 Thickness of the Insulation Layer Thickness of the insulation layer for the condensate water pipe must be greater than 10 mm 0 39inch 2 Bond the insulation material joints with special glue and then wrap them with plastic adhesive The width of the adhesive must be greater than 50mm 1 9...

Page 66: ... overcurrent protection switch Note that generated overcurrent may include some amount of direct current Some installation site may require attachment of an earth leakage breaker If no earth leakage breaker is installed it may cause an electric shock Do not use anything other than breaker and fuse with correct capacity Using fuse and wire or copper wire with too large capacity may cause a malfunct...

Page 67: ...earth Do not connect earth line to any gas pipe liquid pipe lightening rod or telephone earth line If earth is incomplete it may cause an electric shock 3 The yellow green cable inside the air conditioning unit is a grounding cable It cannot be used for other purposes or be cut off Do not fix it with tapping screws Otherwise an electric shock may be caused 4 A reliable ground terminal must be prov...

Page 68: ...rial INSTALLATION 64 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: ...t leakage without connection to pipe Don t install an individual switch or electrical outlet to disconnect each of indoor unit separately from the power supply Install the main switch that can interrupt all the power sources in an integrated manner because this system consists of the equipment utilizing the multiple power sources If there exists the possibility of reversed phase lose phase momenta...

Page 70: ...e and the grounding cable to L1 L2 L3 on the power terminal block and the grounding screw next to the terminal block respectively 2 Fasten and fix the power cable with ties support heads 3 Lay the power cable and communication cable for the ODU according to the maker of external connection circuit diagram NOTICE Provide a threading rubber ring when threading a strong power cable or a communication...

Page 71: ...t is operating with the metal parts stay it may lead to compressor abnormal vibration even reduce the lifespan of the unit 3 INSTALLATION OF THE COMMUNICATION SYSTEM The CAN communication network is adopted for Ultra Heat GMV VRF system Manual DIP or identification on polarities of the communication power is not required for the IDU Only the function DIP needs to be set for the ODU For details see...

Page 72: ...minals 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 69 ...

Page 74: ...d 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 71 Connection of communication for multi module converter system ...

Page 76: ...Ultra Heat GMV VRF Technical Service Manual_Heat Recovery Serial INSTALLATION 72 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 73 Connection of communication for multi refrigeration systems ...

Page 78: ...f there are multiple outdoor modules the communication matched resistance installed before factory of slave modules connecting with D1 D2 must be removed For modular outdoor units if there are multiple outdoor modules S7 dip switch of master unit is 00 and S7 dip switch of slave unit is 10 otherwise the system main board will display CJ which means address DIP switch code of system is shocking For...

Page 79: ...f IDUs controlled by the two wired controllers cannot exceed 16 All connected IDUs must be in the same network The secondary wired controller can be set in start up or shut down mode 1 Press the FUNCTION button for 5 seconds on the wired controller to be set as the secondary wired controller The temperature area displays C00 Continue to press the FUNCTION button for 5 seconds the parameter setting...

Page 80: ...ired controller 01 When two wired controllers control one or multiple IDUs the addresses of the controllers must be different The secondary wired controller address 02 does not support unit parameter setting except setting of its address NOTICE All wired controllers are set to primary wired controllers upon delivery In parameter setting status Fan Timer Sleep and Swing buttons are unavailable Pres...

Page 81: ...rminals and use two wrenches to fix the block nut The ODU pipes cannot be connected when the air tightness test is being performed The test pressure for R410A system is 4 0 MPa Use dry nitrogen as media for the air tightness test Increase the pressure slowly by following the steps below Step 1 Increase the pressure to 0 5 MPa Stop for 5 minutes and then perform air tightness check Major leakage ma...

Page 82: ...f the vacuum pump must be greater than 4 L S The precision of the vacuum pump must be greater than 0 02 mmHg The system vacuum pump must be equipped with a check valve 2 2 Procedure and Precautions for Vacuumization and Desiccation 2 2 1 Procedure 1 Before vacuumization ensure that the stop valves of the gas and liquid pipes are turned off 2 Use the perfusing duct to connect the regulator valve an...

Page 83: ... Use vacuum pump to extract air inside indoor unit and connection pipe from the nozzles of liquid valve high pressure gas valve and low pressure gas valve of outdoor unit as shown in follow figure 2 Because air extraction from outdoor unit s liquid valve high pressure gas valve and low pressure gas valve must be performed simultaneously 2 sets of vacuum pump must be used at the same time to guaran...

Page 84: ...2 9 52 3 8 6 35 1 4 kg m 0 680 0 520 0 350 0 250 0 170 0 110 0 054 0 022 OZ inch 0 61 0 47 0 31 0 22 0 15 0 10 0 05 0 02 Added refrigerant quantity A2 for high pressure gas piping high pressure gas pipe length Added refrigerant quantity for each meter inch of high pressure gas pipe Diameter of high pressure gas pipe mm inch 28 6 1 1 8 25 4 1 22 2 7 8 19 05 3 4 15 9 5 8 12 7 1 2 kg m 0 054 0 046 0 ...

Page 85: ...kage from the system and the compressor is not in operation charge additional R410A with specified amount to the unit through the filling opening of the liquid pipe valve of the outdoor unit If required additional refrigerant cannot be quickly filled for increase of pressure in the pipe set the unit at cooling startup and then fill the refrigerant from gas valve of outdoor unit If ambient temperat...

Page 86: ...ight m1 directly Step 5 Turn on the valve of the high pressure gauge while keep the valve of the high pressure gauge turned off and then perfuse refrigerant to the system Record the change of weight of the refrigerant tank Step 6 When all refrigerant in the refrigerant tank is perfused record the current weight m2 Step 7 Turn off the valve of the high pressure gauge and replace the refrigerant tan...

Page 87: ...ion on commissioning Step 4 When the commissioning step goes to refrigerant perfusion turn on the valve of the refrigerant tank and perfuse the remaining quantity Step 5 After all refrigerant is perfused turn off valve of the refrigerant tank and wait till commissioning is automatically is completed for the system Step 6 Remove the pressure gauge to finish refrigerant perfusion Because R410A is a ...

Page 88: ...al INSTALLATION 84 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 85 CHAPTER 3 COMMISSIONING OPERATION ...

Page 90: ...requirements of this product and national and local security operation requirements Rule breaking operations are prohibited 2 PRECAUTIONS FOR THE USE OF REFRIGERANTS The Ultra Heat GMV serial unit is a refrigerating system of R410A working substances Pay attention to the following points The refrigerating system of R410A working substances has a higher working pressure than that of R22 working sub...

Page 91: ...lized control by multiple systems 00000 The address DIP switch is used only when centralized control is required Otherwise the factory settings are used without being changed The address DIP switch is valid only when it is set on the master unit S4 Module emergency DIP switch Provides after sales emergency setting for module 00 It is better not to use the emergency function Repair malfunctions at ...

Page 92: ...it s cooling and heating capacity will be lowered correspondingly Please be noted 3 1 2 Outdoor fan static pressure setting DIP switch S2 The outdoor fan static pressure setting DIP switch S2 is used in special scenarios such as the unit installation equipment room In scenarios where air ducts are required to be connected zero static pressure 0 Pa low static pressure 30 Pa medium static pressure 5...

Page 93: ...and this system is the master system 4 The centralized control address DIP switch S3 on the master unit of other refrigerating systems must be set as follows Centralized Control Address DIP Switch S3 Address No DIP1 DIP2 DIP3 DIP4 DIP5 0 0 0 0 0 1 1 0 0 0 0 2 0 1 0 0 0 3 1 1 0 0 0 4 0 0 1 0 0 5 1 0 1 0 0 6 0 1 1 0 0 7 1 1 1 0 0 8 0 0 0 1 0 9 1 0 0 1 0 10 0 1 0 1 0 11 1 1 0 1 0 12 0 0 1 1 0 13 1 0 ...

Page 94: ... reserved function DIP switch and meaningless currently 3 1 6 Master unit setting DIP switch S7 The master unit setting DIP switch S7 defines module management of a system A master unit must be set and only one master unit can be set in each refrigerating system in power off status The setting methods are as follows Master Unit Setting DIP Switch S7 DIP1 DIP2 Remark 0 0 Master unit 1 0 Slave unit ...

Page 95: ...n example Set 30Pa to master unit The settings are as follows Master unit 30Pa Note System function settings and query must be performed after commissioning of the entire unit System function settings and query can be used no matter whether the entire unit runs 3 2 System Function Button Operations 3 2 1 Introduction to function buttons When function buttons are used to set functions for outdoor u...

Page 96: ...or partially recovers refrigerants in a faulty module or IDU pipeline according to the system pressure after automatic startup during maintenance A3 Forcible defrosting operation Forcibly enables ODU defrosting operation n5 Indoor unit project number offset Prevents IDU project number conflicts when different refrigerating systems are controlled in a centralized manner A6 Unit cooling heating func...

Page 97: ...isplays press SW4 on the master unit then the master unit is displayed as follows LED1 LED2 LED3 Function Code Display Mode Confirmation Display Mode Current Data Display Mode Ft Blinking OF On Then users can select corresponding functions by pressing SW1 on the master unit including LED1 LED2 LED3 Function Code Display Mode Confirmation Display Mode Current Data Display Mode Ft Blinking OF On A8 ...

Page 98: ...mation Display Mode Current Data Display Mode NH Blinking Parameter value On Then users can select corresponding functions by pressing SW1 on the master unit including LED1 LED2 LED3 Function Code Display Mode Confirmation Display Mode Current Data Display Mode NH Blinking Parameter value On NP Blinking Parameter value On NW Blinking Parameter value On PL Blinking Parameter value On PM Blinking Pa...

Page 99: ...rent commissioning phase and follow steps This function is valid after step 5 For example if receiving a pause continue engineering commissioning signal during the process of step 7 the system will restore the completion phase of step 6 3 4 2 Restoring factory settings Restoring Factory Settings Remark Restoring setting 1 A1 All factory settings of the ODU are restored and the unit waits for re co...

Page 100: ...lay Mode A1 On OF Blinking A1 On On Blinking Next if On data is selected then press SW4 to confirm it The master unit is displayed as follows LED1 LED2 LED3 Function Code Display Mode Confirmation Display Mode Current Data Display Mode A1 On On On On Note A2 function s setting way is the same with A1 means nothing displayed If above function settings are incorrect unit will run abnormal and compre...

Page 101: ... to the requirements on engineering design installation complexity and high precise system control commissioning is mandatory after engineering installation Only a qualified unit can be delivered for use 2 REQUIRED FILES AND TOOLS FOR ENGINEERING DEBUGGING 2 1 Required Tools for Engineering Commissioning Inner hexagon spanner Digital thermometer Shifting spanner Noise meter Cross screwdriver Clamp...

Page 102: ... Make sure that all required files and parameter records are prepared 3 2 Pre commissioning Check Installation environment check covers the heat exchange environment of unit and electromagnetic radiant components All requirements should comply with national and local electrical standards For any installation incompliance records should be made for providing an analysis basis during refrigerating s...

Page 103: ...nnected with the system show that the high pressure value is 28 C 82 and the low pressure value is 27 C 81 The difference between the outdoor environment temperature and either pressure value is less than 5 C K It indicates that the system standby pressure is normal 3 2 3 Electrical system check 1 Check for high electromagnetic interference dusts and acidic or alkaline gas in the unit environment ...

Page 104: ...he electric box In the case of unit power off visually check whether any component in the electric box drops during transportation Then check whether any component or cable is loose or drops by hand For a large scale unit power cable terminals of the patch panel and cable terminals connected with connectors must be tightened with a sleeve spanner or screwdriver and tightened once more after two mo...

Page 105: ...es the construction comply with the design diagram 3 Is the rated capacity of the IDU ODU of a single refrigerating system within 50 135 4 Is the number of connected IDUs in a single refrigerating system within 80 5 Is the access capacity of a fresh air unit within 30 6 Does the difference of level between IDUs and ODUs comply with unit design requirements 7 Does the difference of level between ID...

Page 106: ...nd air return vent of IDU connected with soft connectors Is a plenum chamber installed for air return 27 Is the water pipe of IDU installed with an air exhaust vent 28 Is MASTER stuck to the wired controller or panel of the master IDU 29 Does appending refrigerants to the system comply with requirements 30 Does the ODU run with static pressure Has a static pressure value been set 31 Has the ODU be...

Page 107: ...ED3 Code Display status Code Display status Code Display status 01_ Set master unit malfunction A0 Light System is not debugged CC Light Master unit hasn t been set please set it CF Light Master unit is two or more than two Please reset CJ Light Address DIP switch code of system is shocking db Light 01 Light oC Light Master unit has been set successfully Next step will start automatically 02_Alloc...

Page 108: ...ith IDU In this case please confirm if the ODU valves are open manually db Light 08 Light U0 Preheat time Blink U0 means preheat time for compressor is less than 8 hours db Light 08 Light oC Light Compressor has been preheated for 8 hours Next step will start automatically 09_Refrigerant judgments before startup U4 Light System is lack of refrigerant db Light 09 Light oC Light Refrigerant is norma...

Page 109: ...le as a master unit Setting methods can be seen in Master Unit Setup S7 of Technical service manual Set master unit S7 as 00 Set slave unit S7 as 10 Step 4 Connect power for all indoor units Make sure all IDUs are power on Then all outdoor modules will display A0 Step 5 Find the module with 00 of S7 which is the master module Hold SW4 button on the master module for at least 6s to enable debugging...

Page 110: ...e Status code Progress LED1 LED2 LED3 Code Display status Code Display status Code Display status 03_Confirm the quantity of modules db Light 03 Light oC Light If the quantity displayed is different from actual quantity then disconnect power and check whether communication wire among each module is correctly connected After the check start debugging again Step 9 In progress 04 the quantity of IDUs...

Page 111: ...ng code Progress code Status code Progress LED1 LED2 LED3 Code Display status Code Display status Code Display status 06_Detect outdoor components db Light 06 Light oC Light If error is detected system will stay at current progress Error has to be solved manually Related errors are Debugging Code Progress Code Status Code Meaning Progress LED1 LED2 LED3 Code Display status Code Display status Code...

Page 112: ... status code Display status Code Display status 08_Confirm preheated compressor db Light 08 Light oC Light If less than 8h of preheat time is detected system will give error alarm and display as below Then press SW4 confirmation button and SW2 button at the same time to skip the wait time and start next progress But this will cause force start of the compressor which may damage the compressor Debu...

Page 113: ...ED2 LED3 Code Display status code Display status Code Display status 12_Confirm debugging startup db Light 12 Light oC Light Step 16 After unit is confirmed to start debugging system select cooling heating mode according to ambient temperature automatically A If cooling mode is selected relevant display is as below Debugging code Progress code Status code Meaning progress LED1 LED2 LED3 Code Displ...

Page 114: ...h 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 Step 3 In power off status of ODU set the ODU to a corresponding static pressure mode according to static pressure design requirements for outd...

Page 115: ...he 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 displayed a manual confirmation is required for entering the next commissioning step Click to display relevant information detected on this phase which provides ...

Page 116: ...se 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 In the step 8 Compressor Preheat Confirmation please confirm if the ODU valves are open manually at first then confirm the compressor preheat time ...

Page 117: ...ing is required after troubleshooting the unit automatically enters the next step if no OK exists or click OK to enter the next step Click to display relevant information detected on this phase which provides references for troubleshooting Click Close to close the information Commissioning step 10 and 17 are skipped and commissioning step 11 13 and 14 are reserved ...

Page 118: ...ION 114 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 is displayed on Debugging Complete Then press Debugging complete the steps of debugging information will be cleared and ...

Page 119: ...ds of exceptions and troubleshooting methods during commissioning for later maintenance and query At last make a commissioning report and hand it over to users 3 3 4 Precautions to let users know after commissioning 1 For heat pump let users know where the master IDU is located and stick a label to the master IDU Tell users that modes of other IDUs are limited by the mode of master IDU 2 An ODU th...

Page 120: ...Ultra Heat GMV VRF Technical Service Manual_Heat Recovery Serial MAINTENANCE 116 CHAPTER 4 MAINTENANCE ...

Page 121: ...iple units number of IDU is inconsistent dH PCB of wired controller is abnormal LA For single control over multiple units IDU series is inconsistent dC Setting capacity of DIP switch code is abnormal LH Alarm due to bad air quality dL Malfunction of air outlet temperature sensor LC IDU is not matching with ODU or IDU running mode is inconsistent with ODU allowed mode dE Malfunction of indoor CO2 s...

Page 122: ...g protection of 4 way valve b3 Malfunction of defrosting temperature sensor 2 J8 High pressure ratio protection of system b4 Malfunction of liquid temperature sensor of sub cooler J9 Low pressure ratio protection of system b5 Malfunction of gas temperature sensor of sub cooler JA Protection because of abnormal pressure b6 Malfunction of inlet tube temperature sensor of vapor liquid separator JC Wa...

Page 123: ... poor HH High voltage protection of fan s drive DC bus bar F1 Malfunction of high pressure sensor HC Malfunction of current detection circuit of fan drive F2 Malfunction of middle pressure sensor HL Low voltage protection of bus bar of fan drive F3 Malfunction of low pressure sensor HE Phase lacking of inverter fan F5 Malfunction of discharge temperature sensor of compressor 1 HF Malfunction of ch...

Page 124: ...ion malfunction of mode exchanger C5 Alarm because project code of IDU is inconsistent Status Error Code Content Error Code Content A0 Unit waiting for debugging Ay Shielding status A2 Refrigerant recovery operation of after sales n0 SE operation setting of system A3 Defrosting n3 Compulsory defrosting A4 Oil return n4 Limit setting for max capacity output capacity A6 Heat pump function setting n5...

Page 125: ...or unit 7 Limited frequency reduction for high pressure protection Low pressure protection 12 Indoor unit 8 Malfunction of discharge temperature sensor of compressor 1 High pressure protection 13 Indoor unit 9 Malfunction of outdoor ambient temperature sensor High pressure switch protection 14 Indoor unit 10 Malfunction of outdoor defrosting temperature sensor Drive charging circuit malfunction of...

Page 126: ...ent for fan 4 PFC board 2 IPM Overcurrent for compressor 5 Fan IPM protection 6 Compressor IPM protection 7 PFC overcurrent 8 PFC protection 9 Low voltage protection 10 High voltage protection 11 12 13 14 Drive charging circuit malfunction of compressor 15 16 17 Protection of fan AC current 18 Phase lacking of fan 19 Protection of compressor AC current 20 Phase lacking of compressor 21 Protection ...

Page 127: ...PTIONS 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: ...is not connected 2 The communicator is disconnected 3 The communication cable is poorly connected 4 The communicator is faulty 1 Check if the cable connecting the main board and the compressor s drive board is loose If yes reconnect it 2 Check if the cable connecting the main board and compressor s drive board is broken If yes replace the cable 3 Check the contact of the communication cable connec...

Page 129: ...et the master IDU U3 Power phase sequence protection 1 The three phase power cable is not connected correctly 2 The main board s detection circuit is faulty 1 Check connection of the power cable 2 Replace the main board P3 Compressor drive module reset protection 1 The compressor drive board is faulty 1 Replace the compressor drive board P5 Inverter compressor over current protection 1 The drive b...

Page 130: ... module is damaged 2 The fan s UVW cable is not connected properly 3 The fan is damaged 1 Replace the fan drive board 2 Reconnect the fan s UVW cable 3 Replace the fan H6 Fan drive IPM module protection 1 The fan drive board s IPM module is damaged 2 The fan s UVW cable is not connected properly 3 The fan is damaged 1 Replace the fan drive board 2 Reconnect the fan s UVW cable 3 Replace the fan H7...

Page 131: ...cannot be started before the conflict is solved 1 Manual setting on the communicator and remote controller When the project number conflict occurs you can use the communicator or remote controller to revise project numbers and solve the conflict See the manual of the communicator or remote controller for the method 2 Manual setting on the commissioning software Use the commissioning software to se...

Page 132: ...y Click Project Number Conflict as shown in Fig 3 The pop up box comprises two parts conflicting IDU box showing the IDU s project number system number and time setting box showing the IDU project number setting and setting button Fig 3 Choose one IDU in the conflicting IDU box shown in Fig 3 and click Set in the setting box Choose a value in the pop up box shown in Fig 4 and click Set ...

Page 133: ...tra Heat GMV VRF Technical Service Manual_Heat Recovery Serial MAINTENANCE 129 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: ... to be reset Settings box where you can give the resetting instruction Fig 6 Choose one or multiple systems in the Systems Selection box and click Set in the Settings box as shown in Fig 6 Click Set as shown in Fig 7 Fig 7 If the conflict is solved the system will return to the normal status and IDUs can be operated as shown in Fig 5 2 2 Flowchart Analyzing 1 High exhaust temperature protection E4...

Page 135: ...Ultra Heat GMV VRF Technical Service Manual_Heat Recovery Serial MAINTENANCE 131 ...

Page 136: ...Ultra Heat GMV VRF Technical Service Manual_Heat Recovery Serial MAINTENANCE 132 2 System high pressure protection E1 ...

Page 137: ...Ultra Heat GMV VRF Technical Service Manual_Heat Recovery Serial MAINTENANCE 133 3 System low pressure protection E3 ...

Page 138: ...Ultra Heat GMV VRF Technical Service Manual_Heat Recovery Serial MAINTENANCE 134 4 System refrigerant lacking protection U4 ...

Page 139: ...Ultra Heat GMV VRF Technical Service Manual_Heat Recovery Serial MAINTENANCE 135 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 136 7 Temperature sensor fault 8 Pressure sensor fault ...

Page 141: ...l 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 C2 ...

Page 142: ... 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 Preparation Find a digital multi meter and switch it to the diode Remove U V and W cables of ...

Page 143: ...robe to touch the place marked by N and black probe to touch places marked by U V and W respectively and record readings of the multi meter PFC board method Use the black probe of the multi meter to touch the place marked by P in the follow picture and the red probe to touch places marked by L1 L2 and L3 respectively and record readings of the multi meter Use the red probe to touch the place marke...

Page 144: ...Ultra Heat GMV VRF Technical Service Manual_Heat Recovery Serial MAINTENANCE 140 PFC board 4 Variable frequency compressor drive board IPM over temperature fault ODU fault P8 ...

Page 145: ...Manual_Heat Recovery Serial MAINTENANCE 141 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 142 7 Low voltage protection for the DC bus of the variable frequency compressor s drive board ODU fault PL ...

Page 147: ...onding silkscreen are as follows Capacity DIP S1 Capacity Jumper cap U22 Jump Overflow detect terminal CN35 WATER DTCT Fan overload detect terminal CN36 OVC FAN 1 1 2 Restoring AP1 engineering parameters to factory settings this step is not required for original packaged parts After wiring whatever the AP1 is a master IDU AP1 or a slave IDU AP1 the new AP1 must be restored to factory settings Ther...

Page 148: ...r wired control set to fan mode 30 C 86 F and press and hold and consecutively three times within 5 seconds The IDU and wired control will identify it as a master IDU setting command and show set master IDU success UC 5 seconds and highlight the Master icon respectively Method 3 If the IDU is configured with the Debugger set the IDU to master IDU through this software 2 Troubleshoot for project nu...

Page 149: ...L1 to set P45 and reset IDU project number through one key function Method 3 On the AP1 of the master ODU press and hold SW5 for 10 seconds at least to clear all project numbers of the IDUs and then redistribute project numbers Other parameters are kept unchanged After replacing the main board of master indoor unit the master indoor unit must be reset 1 1 4 Cautions on replacement of slave IDU AP1...

Page 150: ...acement To replace the wired control XK79 in addition to the preceding handling steps specific for XK46 you should also configure access control 1 If the wired control does not need an access control system set switch 1 for DIP S1 at the bottom of the wired control to digital end neglect switch 2 2 If the wired control needs an access control system set switch 1 for DIP S1 at the bottom of the wir...

Page 151: ...ng 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 NOTE You can infer from the preceding figures the current of the compressors operating at other frequency bands Step 2 Check whether the compressor sounds sharp or rubs Compare the...

Page 152: ...k whether there is oil flowing Check method for each part 1 Electric expansion valve This valve will reset for each power on or power off action Touch the valve and you will feel its vibration during the reset action A crack sound will be heard as well Description of electric expansion valve 2 Four way valve While this valve is normally running the four copper pipes connected to it will suffer dif...

Page 153: ...des C and S work at low pressure low temperature The pipe at side D connects to exhaust and it is always working at high pressure high temperature When units are starting defrosting or returning oil the valve will vibrate obviously DO NOT touch the pipe or you may be scalded 3 Oil solenoid valve This valve can be operated based on its state that is shown through the monitoring software and actual ...

Page 154: ...e IPM module is damaged 2 1 2 Precondition units cannot be normally started Step 1 Disconnect the power supply of the units and open the electric junction box of the compressor to see whether wiring of the compressor is intact Step 2 Measure the resistance between two wiring terminals U V W The resistance value range should be 0 5 2 0 Ω Measure the resistance to earth of each wiring terminal The v...

Page 155: ...urposes Step 3 Release refrigerant Refrigerant should be released from the high pressure side and low pressure side at the same time If it is released from one side only the scroll is sealed causing the refrigerant to fail to be released completely Control the release speed it is expected to release for 12 hours or more If too fast massive lubricant will be discharged with the refrigerant Make sur...

Page 156: ...moved check oil quality If oils are contaminated replace the compressor oil separator and gas liquid separator If oil changes to black check oils of other modular units The check procedure is similar to the preceding Note Before replacing the faulty compressors make sure to block their openings with tapes They should be kept intact for further analysis Step 5 Check system parts If system oil is co...

Page 157: ...the container for further factory inspection Note If the compressor needs replacement the gas liquid separator needs replacement as well regardless whether the separator contains impurities or has faults or not 3 Check oil return pipe and oil balance pipe Remove oil return pipe and oil balance pipe and check oil volume and impurity Note Before replacing the faulty parts make sure to block their op...

Page 158: ...at Recovery Serial MAINTENANCE 154 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: ...e course of moving compressors do not lay them down or put them upside down The tilt angle should be less than 30 Make sure oil will not overflow from the oil balance opening The inlet and outlet should be blocked If the sealing rubber is not available cover them with tape to prevent direct contact of oil and air Note The new compressor must be consistent with the faulty one in model Check the rub...

Page 160: ...ng positions Try to finish the welding task once Avoid repeated welding 4 Prepare tools including hexagon diagonal pliers combination pliers needle nose pliers multimeter pressure gauge Phillips screwdriver flathead screwdriver wrenches at least two PVC insulation tape and tielines multiple Step 8 Install a new gas liquid separator Note If a faulty compressor needs replacement the gas liquid separ...

Page 161: ...nd 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 This is because a dirty oil separator cannot be thoroughly cleaned Step 10 Install a new compressor If it is a inverter compressor that needs replacement ...

Page 162: ...e compressors ensuring stability of the compressors during running Power lines of the compressors should be wired following the factory installation You can refer to the wiring diagram Phase sequence error and inverse connection of compressors are not allowed In particular if there are two inverter compressors that need replacement pay attention to wiring Control varies with compressors Inverse co...

Page 163: ...e gas separator is 1L and lubricant that is drawn from the oil separator is 0 7L Then the total required amount is 1 35L 1L 0 7L 3 05L You should add 3 05L lubricant into the system Specific procedure is as follows 1 Ultra Heat GMV series units use FV50S lubricant Make sure to confirm the trademark of the lubricant first Lubricant of other trademarks is not allowed 2 Open all valves and extract ai...

Page 164: ...otary switch of the gauge and close the pump One hour later if the pressure remains the same fill refrigerant If the pressure increases to 0 1kgf cm2 or higher conduct leakage check again Step 14 Fill refrigerant Before filling refrigerant check its manufacturer package and print information Besides check refrigerant pressure and quality against the saturation pressure temperature list 1 Measure a...

Page 165: ...minutes at least After the debug analyze data and adjust the unit system to ensure indexes of the entire system For details about each index please consult after sale persons and technicians 3 CAUTIONS ON COMPRESSOR DRIVE BOARD AND PFC BOARD REPLACEMENT 1 Disconnect the power supply of the system Set a multimeter to the AC voltage gear and measure voltage between two of the lines L1 L2 L3 and N Th...

Page 166: ...ve board anode P cathode N output 450 VDC reactor s wiring terminal input AC power L1 L2 L3 Disconnect all lines of the drive board including compressor line communication line between the master unit and the drive communication line between the drive and the PFC output 18 and 7 5 VDC connecting with compressor PFC board anode P cathode N output 450 VDC AC contactor driver input AC contactor power...

Page 167: ...Ultra Heat GMV VRF Technical Service Manual_Heat Recovery Serial MAINTENANCE 163 PFC board Drive board ...

Page 168: ...Ultra Heat GMV VRF Technical Service Manual_Heat Recovery Serial MAINTENANCE 164 4 Loosen the screws on the compressor drive board and PFC board as shown in the figure below PFC board Drive board ...

Page 169: ...Service Manual_Heat Recovery Serial MAINTENANCE 165 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: ...No refrigerant exists in the pipeline system and the power supply has been disconnected Step Diagram Operation Procedure 1 Remove the front panels Use a screwdriver to unscrew the upper and lower front panels Lift the front panels in order to take it out Note Both the upper panel and lower panel are fixed with two fasteners respectively to connect to the side panels ...

Page 171: ...essor Use a screwdriver to unscrew the power line Remove the power line Remove the electric heating belt and discharge air temperature sensor Note Before removing the power line mark the colors of the line and corresponding wiring terminals 4 Loosen the nuts of the compressor Use a wrench to unscrew the four nuts 5 Remove the suction and discharge pipes Heat the suction and discharge pipes by acet...

Page 172: ...e pipeline system Heat the suction and discharge pipes by acetylene welding and then install the pipes During welding charge nitrogen into the pipes The pressure should be controlled within 0 5 0 1 kgf cm2 relative pressure Avoid nearby materials from being burnt during welding 9 Connect the power line to the compressor and install the electric heating belt and discharge air temperature sensor Put...

Page 173: ...s Four way valve Precondition No refrigerant exists in the pipeline system and the power supply has been disconnected Step Diagram Operation Procedure 1 Remove the front panels Use a screwdriver to unscrew the upper and lower front panels Lift the front panels in order to take it out Note Both the upper panel and lower panel are fixed with two fasteners respectively to connect to the side panels 2...

Page 174: ...rby parts from being burnt during welding 4 Remove the four way valve Remove the four way valve from the pipeline 5 Install a new four way valve Put the valve in a proper position Weld the valve with the pipeline Before welding cover the valve with wet cloth to avoid internal slide from being burnt and prevent water from flowing in the pipeline During welding charge nitrogen into the pipes The pre...

Page 175: ...ctric box and the screws Use a screwdriver to unscrew the upper and lower front panels Lift the front panels in order to take it out Note Both the upper panel and lower panel are fixed with two fasteners respectively to connect to the side panels 2 Remove the electric box Disconnect internal and external connecting lines of the electric box Protect the internal parts during the disassembly 3 Disas...

Page 176: ... wet cloth During welding charge nitrogen into the pipes The pressure should be controlled within 0 5 0 1 kgf cm2 relative pressure Note Avoid nearby parts from being burnt during welding Install the coil on the electric expansion valve 6 Fix and wire the electric box Put the electric box back to original position and screw it Connect all lines 7 Check and install the front panels Check various pa...

Page 177: ...ke it out Note Both the upper panel and lower panel are fixed with two fasteners respectively to connect to the side panels 2 Remove the electric box Disconnect internal and external connecting lines of the electric box Protect the internal parts during the disassembly 3 Disassemble the oil separator Use a screwdriver to unscrew the oil separator Loosen the electric heating belt Heat the four pipe...

Page 178: ... back to original position and screw it Connect all lines 7 Check and install the front panels Check various parts and connecting lines If no problem is found hook the front panels and tighten the screws Gas liquid separator Precondition No refrigerant exists in the pipeline system and the power supply has been disconnected Step Diagram Operation Procedure 1 Loosen the hooks at the bottom of the e...

Page 179: ...g and then remove the pipes Note Avoid nearby parts from being burnt during welding 4 Remove the gas liquid separator Unscrew and remove the gas liquid separator 5 Install a new gas liquid separator Put the gas liquid separator based on the position of the suction and discharge pipes and weld the pipes with the gas liquid separator During welding charge nitrogen into the pipes The pressure should ...

Page 180: ...ondition No refrigerant exists in the pipeline system and the power supply has been disconnected Step Diagram Operation Procedure 1 Loosen the hooks at the bottom of the electric box and the screws Use a screwdriver to unscrew the upper and lower front panels Lift the front panels in order to take it out Note Both the upper panel and lower panel are fixed with two fasteners respectively to connect...

Page 181: ... support of the heat exchanging board and remove the support and board 5 Install a new heat exchanging board Screw the support of the heat exchanging board and fix the board onto the chassis Put the heat exchanging board based on the position of the suction and discharge pipes and weld the pipes with the heat exchanging board During welding charge nitrogen into the pipes The pressure should be con...

Page 182: ...ake condensing water discharged freely 5 3 Pre Season Cautions 1 Check IDU and ODUs air inlets and outlets for blockage 2 Check whether they are properly earthed 3 Check batteries of the remote control 4 Check whether air filters have been properly installed 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 s...

Page 183: ... VISUAL INSPECTION CHECKLIST OF THE DEBUG SYSTEM Visual inspection checklist of air conditioning equipment Item Problem Checked by Check time Refrigerating system Appearance of ODUs Appearance of IDUs Thermal insulation of copper pipes Discharge system Thermal insulation of condensing pipes Electric system Power line diameter Cabling of power lines Air circuit breaker Communication system Material...

Page 184: ...ating Heating Number and capacity of running IDUs State parameter Unit Prestart 30min 60min 90min ODU Outdoor temperature F Power voltage V Frequency Hz Compressor current A Discharge temperature F System temperature under high pressure F System temperature under low pressure F 1 IDU Rated capacity kW Ambient temperature F IDU gear Gear Outlet temperature F Outlet speed M S Noise dB Water tray 2 I...

Page 185: ... 328 22 30 22 0 2 72 39 45 4 39 2 9 12 132 27 38 100 4 23 20 336 49 29 20 2 2 83 41 05 5 41 0 9 40 136 34 39 102 2 23 77 344 75 28 18 4 2 95 42 79 6 42 8 9 69 140 54 40 104 0 24 36 353 31 27 16 6 3 07 44 53 7 44 6 9 99 144 89 41 105 8 24 95 361 87 26 14 8 3 19 46 27 8 46 4 10 30 149 39 42 107 6 25 56 370 72 25 13 0 3 32 48 15 9 48 2 10 61 153 89 43 109 4 26 18 379 71 24 11 2 3 45 50 04 10 50 0 10 ...

Page 186: ...7 19 4 70 5 0 579 54 129 2 4 625 2 522 114 237 2 0 678 3 157 6 21 2 66 88 0 605 55 131 4 456 2 544 115 239 0 66 3 161 5 23 63 46 0 631 56 132 8 4 294 2 566 116 240 8 0 642 3 165 4 24 8 60 23 0 658 57 134 6 4 139 2 586 117 242 6 0 625 3 168 3 26 6 57 18 0 686 58 136 4 3 99 2 607 118 244 4 0 608 3 171 2 28 4 54 31 0 714 59 138 2 3 848 2 626 119 246 2 0 592 3 175 1 30 2 51 59 0 743 60 140 3 711 2 646...

Page 187: ...45 293 0 307 3 234 25 77 15 1 65 86 186 8 1 544 2 992 146 294 8 0 299 3 235 26 78 8 14 36 1 686 87 188 6 1 497 3 001 147 296 6 0 292 3 237 27 80 6 13 74 1 722 88 190 4 1 451 3 009 148 298 4 0 286 3 238 28 82 4 13 16 1 758 89 192 2 1 408 3 017 149 300 2 0 279 3 24 29 84 2 12 6 1 793 90 194 1 363 3 025 150 302 0 273 3 241 30 86 12 07 1 829 91 195 8 1 322 3 033 151 303 8 0 266 3 242 31 87 8 11 57 1 8...

Page 188: ... 141 17 1 4 162 1 0 362 47 116 6 8 051 2 353 111 231 8 0 9825 3 145 16 3 2 153 3 0 381 48 118 4 7 745 2 379 112 233 6 0 9556 3 15 15 5 145 0 4 49 120 2 7 453 2 404 113 235 4 0 9295 3 153 14 6 8 137 2 0 42 50 122 7 173 2 429 114 237 2 0 9043 3 157 13 8 6 129 9 0 44 51 123 8 6 905 2 453 115 239 0 8799 3 161 12 10 4 123 0 462 52 125 6 6 648 2 477 116 240 8 0 8562 3 165 11 12 2 116 5 0 484 53 127 4 6 ...

Page 189: ...2 934 144 291 2 0 4187 3 232 17 62 6 28 68 1 356 81 177 8 2 415 2 944 145 293 0 4088 3 234 18 64 4 27 39 1 393 82 179 6 2 339 2 954 146 294 8 0 3992 3 235 19 66 2 26 17 1 429 83 181 4 2 265 2 964 147 296 6 0 3899 3 237 20 68 25 01 1 466 84 183 2 2 194 2 974 148 298 4 0 3808 3 238 21 69 8 23 9 1 503 85 185 2 125 2 983 149 300 2 0 3719 3 24 22 71 6 22 85 1 54 86 186 8 2 059 2 992 150 302 0 3633 3 24...

Page 190: ...3 2 384 51 0 084 45 113 21 425 1 05 106 222 8 2 7922 2 58 15 5 362 99 0 088 46 114 8 20 601 1 078 107 224 6 2 715 2 595 14 6 8 342 83 0 094 47 116 6 19 814 1 107 108 226 4 2 6404 2 611 13 8 6 323 94 0 099 48 118 4 19 061 1 136 109 228 2 2 5682 2 626 12 10 4 306 23 0 104 49 120 2 18 34 1 164 110 230 2 4983 2 64 11 12 2 289 61 0 11 50 122 17 651 1 193 111 231 8 2 4308 2 655 10 14 274 02 0 116 51 123...

Page 191: ...82 1 943 137 278 6 1 2545 2 932 16 60 8 73 896 0 393 77 170 6 6 7608 1 969 138 280 4 1 2233 2 94 17 62 6 70 503 0 41 78 172 4 6 542 1 995 139 282 2 1 1969 2 947 18 64 4 67 338 0 427 79 174 2 6 3315 2 021 140 284 1 1694 2 955 19 66 2 64 333 0 444 80 176 6 1288 2 046 141 285 8 1 1476 2 96 20 68 61 478 0 462 81 177 8 5 9336 2 071 142 287 6 1 1166 2 969 21 69 8 58 766 0 48 82 179 6 5 7457 2 096 143 28...

Page 192: ... 1 784 28 18 4 295 42 8 0 229 28 82 4 1801 261 1 1 834 27 16 6 307 44 5 0 242 29 84 2 1848 268 1 884 26 14 8 319 46 3 0 255 30 86 1897 275 1 1 937 25 13 332 48 1 0 268 31 87 8 1946 282 2 1 989 24 11 2 345 50 0 282 32 89 6 1996 289 4 2 042 23 9 4 359 52 1 0 297 33 91 4 2048 297 2 098 22 7 6 373 54 1 0 312 34 93 2 2100 304 5 2 153 21 5 8 388 56 3 0 328 35 95 2153 312 2 2 21 20 4 403 58 4 0 344 36 96...

Page 193: ...57 124 3 0 828 58 136 4 3686 534 5 3 844 3 37 4 884 128 2 0 857 59 138 2 3767 546 2 3 93 4 39 2 912 132 2 0 887 60 140 3849 558 1 4 018 5 41 940 136 3 0 917 61 141 8 3932 570 1 4 106 6 42 8 969 140 5 0 947 62 143 6 4017 582 5 4 197 7 44 6 999 144 9 0 979 63 145 4 4103 594 9 4 288 8 46 4 1030 149 4 1 012 64 147 2 4190 607 6 4 381 9 48 2 1061 153 8 1 046 65 149 4278 620 3 4 475 10 50 1093 158 5 1 08...

Page 194: ... 1 30 2 799 115 9 1 895 56 68 8 80 11 6 0 457 0 32 804 116 6 1 905 55 67 84 12 2 0 465 1 33 8 830 120 4 1 957 54 65 2 89 12 9 0 475 2 35 6 857 124 3 2 011 53 63 4 94 13 6 0 485 3 37 4 884 128 2 2 065 52 61 6 99 14 4 0 495 4 39 2 912 132 2 2 121 51 59 8 104 15 1 0 505 5 41 940 136 3 2 177 50 58 109 15 8 0 515 6 42 8 969 140 5 2 235 49 56 2 115 16 7 0 527 7 44 6 999 144 9 2 295 48 54 4 121 17 5 0 53...

Page 195: ...4 295 42 8 0 887 28 82 4 1801 261 1 3 899 27 16 6 307 44 5 0 911 29 84 2 1848 268 3 993 26 14 8 319 46 3 0 935 30 86 1897 275 1 4 091 25 13 332 48 1 0 961 31 87 8 1946 282 2 4 189 24 11 2 345 50 0 987 32 89 6 1996 289 4 4 289 23 9 4 359 52 1 1 015 33 91 4 2048 297 4 393 22 7 6 373 54 1 1 043 34 93 2 2100 304 5 4 497 21 5 8 388 56 3 1 073 35 95 2153 312 2 4 603 20 4 403 58 4 1 103 36 96 8 2208 320 ...

Page 196: ...iator 430034000034 2 4 Axial Flow Fan 10434100002 2 46 Radiator 430034000033 2 5 Fan Motor 15704119 2 47 Terminal Board 42018000026 1 6 Strainer 07210022 1 48 Main Board 300027000196 1 7 Electromagnetic Valve 43000054 8 49 Filter Board 300027000260 2 8 Upper Cover Plate back 01264100005 1 50 Terminal Board 42018000558 1 9 Condenser Assy 0115410001201 1 51 Insulation Gasket 70415001 1 10 Rear Grill...

Page 197: ...92 1 25 Discharge Charge Valve 07334100002 3 67 Magnet Coil electromagnetic valve 4304000459 1 26 Electromagnetic Valve 43044100144 2 68 Magnet Coil electromagnetic valve 4304000470 1 27 Electromagnetic Valve 43000072 4 69 Magnet Coil 4304000486 1 28 Cut off Valve 1 4 071302398 1 70 Magnet Coil electromagnetic valve 4304000462 1 29 Cut off Valve 07334100011 1 71 Magnet Coil electromagnetic valve 4...

Page 198: ...ear Grill 01574100001 1 52 Wire Clamp 71015001 1 11 Electromagnetic Valve 43000055 1 53 Electrical Heater Compressor 765152128 1 12 Strainer 07415200002 3 54 Electrical Heater Compressor 7651521212 1 13 One way Valve 04324001 1 55 Pressure sensor 32218000008 1 14 Gas liquid Separator 035027000007 1 56 Pressure Sensor High Pressure 322101037 1 15 Accumulator 07424100036 1 57 Pressure Sensor 3221800...

Page 199: ...4304000481 1 33 One Way Valve 07136007 1 75 Magnet Coil electromagnetic valve 4304000463 1 34 Screw Sub Assy 26904100016 2 76 Magnet Coil electromagnetic valve 4304000465 1 35 Top Cover front 01264100004P 2 77 Sensor Sub assy 390002000044 3 36 One Way Valve 07333700032 2 78 Electronic Expansion Valve 43044100173 1 37 Pressure Protect Switch 4602000910 1 79 Electronic Expansion Valve 072009000001 1...

Page 200: ...ode Quantity 1 Coping 01264100055P 1 2 Terminal Board 420111451 1 3 Pinboard 30270000002 1 4 Terminal Board 42018000026 2 5 Electromagnetic Valve 43000073 2 6 Chassis 01284100129P 1 7 Seal plate 01494100015P 1 8 Side Plate 01314100096P 1 9 Hook 02112446 4 10 Strainer 0741410000601 2 11 Electronic Expansion Valve 07334463 1 12 Strainer 07415200002 1 ...

Page 201: ... plate 01494100014P 1 15 Electric Expand Valve Fitting 4304413205 1 16 Magnet Coil 4304000428 1 17 Magnet Coil 4304000447 1 18 Magnet Coil 4304000448 1 19 Tube sensor 3900012128G 1 20 Temperature Sensor 390000372G 1 Note Above data is subject to change without notice please refer the SP in global service website 5 3 NCHS2B U ...

Page 202: ...of Drain Pipe 76712455 2 11 Seal plate 012034000091 1 12 Hook 02112446 4 13 Side Plate 017110000026 1 14 Cover plate 012035000094 1 15 Strainer 0741410000601 2 16 Electronic Expansion Valve 07334463 1 17 Seal Plate 012034000092 1 18 Magnet Coil 4304000469 1 19 Magnet Coil 4304000471 1 20 Magnet Coil 4304000466 1 21 Magnet Coil 4304000467 1 22 Magnet Coil 4304000470 1 23 Magnet Coil 4304000468 1 24...

Page 203: ...Ultra Heat GMV VRF Technical Service Manual_Heat Recovery Serial MAINTENANCE 199 5 4 NCHS4B U ...

Page 204: ...romagnetic Valve 43000054 1 10 Choke Plug of Drain Pipe 76712455 2 11 Seal plate 01494100018P 1 12 Hook 02112446 4 13 Side Plate 01314100100P 1 14 Strainer 0741410000601 2 15 Electronic Expansion Valve 07334463 1 16 Seal plate 01494100017P 1 17 Magnet Coil 4304000428 1 18 Magnet Coil 4304000448 2 19 Magnet Coil 4304000447 2 20 Magnet Coil 4304000449 2 21 Magnet Coil 4304000446 2 22 Tube sensor 390...

Page 205: ...Ultra Heat GMV VRF Technical Service Manual_Heat Recovery Serial MAINTENANCE 201 5 5 NCHS8B U ...

Page 206: ... Drain Pipe 76712455 2 11 Seal plate 01494100018P 1 12 Hook 02112446 4 13 Side Plate 01314100102P 1 14 Top Cover 012035000094 1 15 Strainer 0741410000601 2 16 Electronic Expansion Valve 07334463 1 17 Seal Plate 01494100017P 1 18 Magnet Coil 4304000428 1 19 Magnet Coil 4304000448 4 20 Magnet Coil 4304000447 4 21 Magnet Coil 4304000449 4 22 Magnet Coil 4304000446 4 23 Magnet Coil 4304000450 4 24 Mag...

Page 207: ...Jf00303410 ...

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