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GREE GMV5E DC INVERTER VRF UNITS SERVICE MANUAL

191

Troubleshooting:

2.2.4.73

“FU” Compressor 1 shell top temperature sensor error

Error display:

ODU mainboard, IDU wired controller and IDU receive light board will

display

Error judgment condition and method:

Sample the AD value of temperature sensor through temperature sensor detecting circuit and judge

the range of AD value. If the sampling AD value exceeds upper limit and lower limit in 30 seconds

continuously, report the error

Possible reason

：

■Poor contact between shell top temperature sensor and terminal in mainboard interface

■Shell top temperature sensor is abnormal

■Detecting circuit is abnormal

Summary of Contents for /E-X

Page 1: ...GMV5E DC INVERTER VRF UNITS GC201806 III Capacity 22 4kW 246 0kW Rated Frequency 50Hz 60Hz Operation Range Cooling 5 52 C Heating 20 24 C...

Page 2: ...ew of Design Drawing 24 1 5 Construction Organization Process 25 2 Material Selection 25 2 1 Requirement for Selecting Construction Materials 25 2 2 Requirement for Selecting Major Materials 26 3 Inst...

Page 3: ...Security Requirements 74 1 1 Precautions for Construction 74 1 2 Precautions for the Use of Refrigerants 74 2 Introduction to Unit Functions 74 2 1 System Function DIP Switch Settings 74 2 2 System Fu...

Page 4: ...269 3 5 Exploded Views and Spaer Part List 282 4 Common Parameter Lists 294 4 1 R410a refrigerant pressure saturation temperature list 294 4 2 Resistance temperature lists of temperature sensors 295...

Page 5: ...parallel Similarly indoor units IDUs consist of multiple units connecting in parallel The operating principle is as follows When an IDU is operating in cooling mode the outdoor unit ODU can correspond...

Page 6: ...0 28 0 3 380 415 50 60 GMV 280WM E1 X R410A CN851W2200 28 0 3 380 415 50 60 GMV 335WM E X R410A CN851W1810 33 5 3 380 415 50 60 GMV 400WM E X R410A CN851W1820 40 0 3 380 415 50 60 GMV 450WM E1 X R410A...

Page 7: ...GREE GMV5E DC INVERTER VRF UNITS SERVICE MANUAL 3 1 3 Internal Piping Design of the Units 1 3 1 Piping Diagram of GMV 224WM E X GMV 280WM E X GMV 280WM E1 X and GMV 335WM E X...

Page 8: ...GREE GMV5E DC INVERTER VRF UNITS SERVICE MANUAL 4 1 3 2 Piping Diagram of GMV 400WM E X and GMV 450WM E1 X...

Page 9: ...ssor by sending feedback signal to stop the system when the compressor s discharge temperature exceeds the operating value of high pressure circuit breaker 6 Oil extractor Separates the gas and oil in...

Page 10: ...24 Outlet temperature sensor of gas liquid separator Detects internal status of gas liquid separator to further control the compressor suction performance 25 Oil equalizing valve 1 Used for oil equal...

Page 11: ...3 5 3 5 4 5 Weight kg 225 235 225 285 360 Refrigerant Name R410A R410A R410A R410A R410A Built in Filling Volume kg 5 9 9 6 7 8 2 9 8 Model GMV 450WM E X GMV 450WM E1 X GMV 504WM E X GMV 560WM E X GM...

Page 12: ...erant Name R410A R410A R410A R410A R410A Built in Filling Volume kg 9 0 9 8 9 0 10 3 9 0 11 3 9 0 14 3 9 0 14 3 Model GMV 960WM E X GMV 1010WM E X GMV 1065WM E X GMV 1130WM E X GMV 1180WM E X Refriger...

Page 13: ...R410A Built in Filling Volume kg 14 3 14 3 9 0 10 3 14 3 9 0 10 3 14 3 8 2 10 3 14 3 9 0 14 3 14 3 Model GMV 1515WM E X GMV 1580WM E X GMV 1630WM E X GMV 1685WM E X GMV 1750WM E X Refrigeration Capac...

Page 14: ...5 360 385 385 235 385 385 385 Refrigerant Name R410A R410A R410A R410A R410A Built in Filling Volume kg 14 3 14 3 14 3 14 3 14 3 14 3 9 0 10 3 14 3 14 3 9 0 11 3 14 3 14 3 9 0 14 3 14 3 14 3 Model GMV...

Page 15: ...385 Refrigerant Name R410A R410A R410A R410A Built in Filling Volume kg 10 3 14 3 14 3 14 3 11 3 14 3 14 3 14 3 14 3 14 3 14 3 14 3 14 3 14 3 14 3 14 3 Note Due to the same capacity GMV 280WM E1 X mo...

Page 16: ...10 10 2 5 5 10 5 10 5 10 5 GMV 2016WM E X 280 560 560 615 200 25 63 63 63 2 5 10 10 10 2 5 5 10 5 10 5 10 5 GMV 2072WM E X 280 560 615 615 200 25 63 63 63 2 5 10 10 10 2 5 5 10 5 10 5 10 5 GMV 2128WM...

Page 17: ...40 C If working condition is different please adjust the specification according to national standard The circuit breaker should include magnetic trip function and thermal trip function so that syste...

Page 18: ...GREE GMV5E DC INVERTER VRF UNITS SERVICE MANUAL 14 Circuit diagram of GMV 335WM E X Circuit diagram of GMV 400WM E X and GMV 450WM E1 X...

Page 19: ...r duct type indoor unit Remote controller YAP1F Dct type indoor unit Otional Wall Mounted indoor unit Standard Remote controller for debugging YV1L1 With the debugging function used to set functions o...

Page 20: ...gateway ME30 24 DF B Note Contact local sales company for optional accessories 1 7 Basic Requirement for Pipe Connection 1 Outdoor units adopt the modular combination design of individual cooling sys...

Page 21: ...therwise overheat oil may burn the operator 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...

Page 22: ...56 5 152 6 GMV 1180WM E X 64 59 0 159 3 GMV 1235WM E X 64 62 5 168 8 GMV 1300WM E X 64 65 0 175 5 GMV 1350WM E X 64 67 5 182 3 GMV 1410WM E X 66 70 5 190 4 GMV 1460WM E X 69 73 0 197 1 GMV 1515WM E X...

Page 23: ...additional charging amount kg Amount of refrigerant kg which is charged before leaving the factory for the system consisting of multiple modules in parallel the accumulative charge quantity of modules...

Page 24: ...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 fails to keep normal operation due to fr...

Page 25: ...bly The air outlet or return air inlet may be short circuited thus affecting the air conditioning performance 17 The ODU is improperly installed The ODU is difficult to be maintained unit exhaust is n...

Page 26: ...r casing should be preserved If the pipe needs to go through a bearing beam a steel casing must be prepared 2 Requirements for cooperation with decoration engineering The air conditioning installation...

Page 27: ...GREE GMV5E DC INVERTER VRF UNITS SERVICE MANUAL 23 Any nonconformity must be resolved through coordination...

Page 28: ...reliability can be affected Therefore relevant regulations on capacity limit must be strictly followed 2 The difference of level between an ODU and an IDU and that between IDUs must be set within the...

Page 29: ...ditioning engineering construction must have certifications and test reports Products with fireproof requirements must be provided with fireproof inspection certificates and must meet national and rel...

Page 30: ...1 2H 41 3 1 5 1 2H 44 5 1 5 1 2H 51 4 1 5 1 2H 54 1 1 5 1 2H f After the inner part of the copper pipe is cleaned and dried the inlet and outlet must be sealed tightly by using pipe caps plugs or adhe...

Page 31: ...unication cable selection for IDU and wired controller Material type Total length of communication line between IDU unit and wired controller L m Wire size mm2 Material standard Remarks Light Ordinary...

Page 32: ...ANUAL 28 3 2 ODU Dimensions and Installation Hole Size Outline and Physical Dimention of GMV 224WM E X GMV 280WM E1 X and GMV 280WM E X unit unit mm Outline and Physical Dimention of GMV 335WM E X GMV...

Page 33: ...GMV 615WM E X unit unit mm 3 3 Installation Space Requirement for ODU 1 If all sides of the ODU including the top are surrounded by walls process according to the following requirements for installati...

Page 34: ...GREE GMV5E DC INVERTER VRF UNITS SERVICE MANUAL 30 Installation space requirements for triple module unit unit mm Installation space requirement for quad module unit unit mm...

Page 35: ...hould be at least 1500 mm as shown in Fig a If the requirement for the minimum 1500 mm cannot be met or the spaces around the machine are not open an air outlet pipe needs to be connected to maintain...

Page 36: ...lation Anti monsoon installation requirements for unit not connecting exhaust duct Anti monsoon installation requirements for unit connecting exhaust duct 4 Snow must be considered during ODU installa...

Page 37: ...the unit 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...

Page 38: ...Install the ODU 2 and steel plate ventilating 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 th...

Page 39: ...check the joints reliability Note Remove the grille on the top case when connecting an ODU to static pressure ventilating duct otherwise the air volume especially the unit operating performance will b...

Page 40: ...chamfered D When the foundation is built on a concrete floor crushed stones are not required But the foundation surface must be roughened E Clear the oil stains crushed stones dirt and water in the re...

Page 41: ...should be as large as possible 3 Weld the connection pipes between indoor and outdoor unit Please strictly conform to the requirements for welding process Rosin joints and pin holes are not allowable...

Page 42: ...n bending the pipe 6 Don t forbibly stretch the pipe joint otherwise indoor capillary or other pipes might be damaged and lead to refrigerant leakage 5 Piping Connection 5 1 Schematic Diagram of Pipin...

Page 43: ...0WM E X GMV 504WM E X GMV 560WM E X and GMV 615WM E X 5 3 Allowable pipe length and drop height among indoor and outdoor units Y type branch joint is adopted to connected indoor and outdoor units Conn...

Page 44: ...40m When those three conditions as below are satisfied the length can reached 90m Actual length of pipe in total L1 L2x2 L3x2 L4x2 L9x2 a b i j 1000m Length between each IDU and its nearest branch a...

Page 45: ...5 22 2 GMV 1908WM E X 51 4 25 4 GMV 1962WM E X 51 4 25 4 GMV 2016WM E X 51 4 25 4 GMV 2072WM E X 51 4 25 4 GMV 2128WM E X 51 4 25 4 GMV 2184WM E X 51 4 25 4 GMV 2240WM E X 51 4 25 4 GMV 2295WM E X 51...

Page 46: ...ents 0 25 Piping between modules is at the same level with the module pipe connector Piping between modules is under the module pipe connector and does not incline Piping between modules is under the...

Page 47: ...m GMV 224WM E X 19 05 9 52 GMV 280WM E1 X 22 2 9 52 GMV 280WM E X 22 2 9 52 GMV 335WM E X 25 4 12 7 GMV 400WM E X 25 4 12 7 GMV 450WM E1 X 28 6 12 7 GMV 450WM E X 28 6 12 7 GMV 504WM E X 28 6 15 9 GMV...

Page 48: ...of outdoor module Select the branch of outdoor module Model ML01 A 3 Fitting pipe between two manifolds from basic modules Pipe size between two manifolds from basic modules is based on the total capa...

Page 49: ...335WM E X 25 4 12 7 GMV 400WM E X 25 4 12 7 GMV 450WM E1 X 28 6 12 7 GMV 450WM E X 28 6 12 7 GMV 504WM E X 28 6 15 9 GMV 560WM E X 28 6 15 9 GMV 615WM E X 28 6 15 9 For multiple modules the piping fro...

Page 50: ...E X 38 1 19 05 GMV 1350WM E X 38 1 19 05 GMV 1410WM E X 41 3 19 05 GMV 1460WM E X 41 3 19 05 GMV 1515WM E X 41 3 19 05 GMV 1580WM E X 41 3 19 05 GMV 1630WM E X 41 3 19 05 GMV 1685WM E X 41 3 19 05 GMV...

Page 51: ...tream indoor unit s Refer to the following table Outdoor unit 1 Outdoor unit 2 Outdoor unit 3 indoor manifold R410A Refrigerant System Total capacity of downstream indoor unit s C kW Model Y type Mani...

Page 52: ...5 5 6 C 14 2 15 9 9 52 14 2 C 25 2 19 05 9 52 25 2 C 28 0 22 2 9 52 28 0 C 40 0 25 4 12 7 40 0 C 45 0 28 6 12 7 45 0 C 68 0 28 6 15 9 68 0 C 96 0 31 8 19 05 96 0 C 135 0 38 1 19 05 135 0 C 186 0 41 3...

Page 53: ...mance 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 ai...

Page 54: ...nd sundries in the pipe with nitrogen This method applies to coils After cleaning cover the both ends of the pipe with a sealing cap or adhesive tape 6 1 2 3 Pipe Bending Processing methods Manual ben...

Page 55: ...nts in the pipe system Performing a air tightness test Performing insulation 2 Construction of Built in Metal Fittings 1 Construction of supports hangers and brackets for pipes These parts must be fix...

Page 56: ...to ensure good insulation The style and workmanship of supports hangers and brackets must follow the standard T616 HVAC Systems Design Handbook The minimum distance between supports hangers and brack...

Page 57: ...inder 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 6 Requirements on Manifold Installation Manifolds are used to divert refrigerant...

Page 58: ...pe between the branch of the manifold and the IDU cannot be less than 500 mm E6 Fixing of manifolds There must be three fixing point for both horizontal and vertical installation of the Y type manifol...

Page 59: ...eal the branch which are not used gas side liquid side Seal the branch which are not used A view B view A view B view Inlet Inlet Outlet Outlet within 15 within 15 gas side liquid side A view within 1...

Page 60: ...ength of one Y type manifold pipe is about 0 5m Equivalent length of branch of IDU is 0 5m F6 Min Max Number IDUs connectable with each T Type manifold pipe Min Number IDUs Max Number IDUs FQ14 H1 2 4...

Page 61: ...the liquid pipe in the outdoor pipe system Regulate the nitrogen pressure to about 5 kgf cm and blow nitrogen into the pipe for 1 minute Repeat this operation for three times till the dirt and water a...

Page 62: ...as pipe after starting all IDUs and keeping them running cooling mode for 24 hours 1 Power off all units 2 Turn off the two stop valves of the gas pipe 3 Remove the filter 4 Short connect with a coppe...

Page 63: ...ck whether drainage is smooth and whether water leakage exists in the pipe system 8 Equip a steel casing for all pipes which are led through the wall or floor Pipe bonding joints cannot be placed insi...

Page 64: ...den Air duct type IDU for Air Supply 1 Ensure an inclination degree of greater 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 t...

Page 65: ...quirements on independent drainage design for each IDU are as follows 1 There must be a proper inclination for the drain pipe 2 The drain pipe must be installed to facilitate drainage to the largest e...

Page 66: ...ss test perform insulation to the welding point separately to ensure continuity of the insulation sleeve e The insulation layer cannot crack during construction Bond the insulation material joints wit...

Page 67: ...crew head exists 3 The external conducting wire must be fixed by a clip Otherwise personal injury or fire may occur Power cable Indoor outdoor unit communication D1 D2 Wired controller H1 H2 Indoor ou...

Page 68: ...t connect the grounding cable to any of the following a Water pipes b Gas pipes c Drainage pipe d Other places deemed as unreliable 5 The power cable and the communication cable must be laid separatel...

Page 69: ...he grounding cable to L1 L2 L3 and N on the power terminal block and the grounding screw next to the terminal block respectively Inner unit connection cable Terminal block Connector of the grounding c...

Page 70: ...MV5E 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 the description on f...

Page 71: ...ching resistor placed in the package of the ODU 7 3 3 Communication Cable Connection Method and Procedure Communication cable connection between the IDUs and ODUs The communication cable between the I...

Page 72: ...matching resistor placed in the package of the ODU 8 Vacuumization and Desiccation for the Refrigerant System Works for the refrigerant system include cleaning and desiccating the pipes performing an...

Page 73: ...ot decrease it meets the requirement 8 1 3 Precautions a The measuring range of the test pressure gauge for R410A system must be above 4 5 MPa b Record the value displayed on the pressure gauge ambien...

Page 74: ...this case discharge water by means of vacuum breaking Perfuse nitrogen at 0 05 MPa to the pipe Vacuumize for 2 hours and keep vacuuming for 1 hour If the vacuum degree of 0 1 MPa cannot be reached rep...

Page 75: ...outdoor unit If all of the indoor units are fresh air indoor units the quantity of refrigerant added to each module is 0kg If outdoor air processor is connected with normal VRF indoor unit adopt the...

Page 76: ...vacuum pump and connect it to the refrigerant tank Step 3 Properly loosen the joint between the medium gauge pipe and the pressure gauge and slightly turn on the valve of the refrigerant tank Vacuumi...

Page 77: ...f 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 liquid and connect it to the low pressure d...

Page 78: ...bstances Pay attention to the following points 1 The refrigerating system of R410A working substances has a higher working pressure than that of R22 working substances The working pressure of the form...

Page 79: ...switch 00 SA8_MASTER S Master unit setting DIP switch Defines the master unit 00 A master unit must be set and only one master unit can be set in each refrigerating system This DIP switch is mandator...

Page 80: ...r and the unit cannot run properly 6 Suppose the centralized control address SA2 Addr CC of the master unit for one GMV system is set to 1 1 1 1 X this system is the master mode system and its running...

Page 81: ...in compressor emergency operation status Once 24 hours are exceeded the entire unit will be forcibly stopped and the limited operation code Ad is displayed on the IDU F 1 6 compressors are defined fro...

Page 82: ...ion status Once 24 hours are exceeded the entire unit will be forcibly stopped and the limited operation code Ad is displayed on the IDU H The system cannot continually run for more than 48 hours in m...

Page 83: ...t the DIP switch should be independently set on each module Reserved Function DIP Switch SA7 SA7 is the reserved function DIP switch and meaningless currently Master Unit Setting DIP Switch SA8_MASTER...

Page 84: ...ystem 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 2 2 1 Introduction to F...

Page 85: ...d n3 Forcible defrosting operation Forcibly enables ODU defrosting operation It can only be set n4 Conservation control 2 Forcibly decreases the maximum power consumption of the unit 00 No capacity ou...

Page 86: ...with other modes at the same time factory settings nC Single cooling Cooling mode dehumidifying mode and air supply mode nH Single heating Heating mode and air supply mode Note The heating mode cannot...

Page 87: ...enabled after this function is set 5 n0 Conservation control 1 System conservation is set when conservation operations are required The default factory setting is capacity priority control mode The sy...

Page 88: ...ed status of function settings By default the master unit is displayed as follows LED1 LED2 LED3 Function Code Display Mode Current Progress Display Mode Current Status Display Mode A7 Blinking 00 Bli...

Page 89: ...ng OC Blinking A7 On 01 Blinking OC Blinking A7 On 02 Blinking OC Blinking A7 On 03 Blinking OC Blinking A7 On 04 Blinking OC Blinking A7 On 05 Blinking OC Blinking A7 On 06 Blinking OC Blinking A7 On...

Page 90: ...de Code Display Mode A6 On nC On nC On A6 On nH On nH On A6 On nA On nA On A6 On nF On nF On On the master unit press SW6 to return to the upper level press SW6 in setting status to return to the uppe...

Page 91: ...ergency operation status and close the liquid tube stop valve of the emergency status module Select 02 as in step 2 to enter basic module refrigerant recovery The display is as follows LED1 LED2 LED3...

Page 92: ...Current Status Display Mode n0 On 01 Blinking OC Blinking n0 On 02 Blinking OC Blinking Step 3 Press SW7 to confirm selecting the mode The master unit is displayed as follows LED1 LED2 LED3 Function C...

Page 93: ...s Press SW6 in setting status to return to the upper level press SW6 after settings are completed to restore the normal operating status of the unit n5 Indoor unit project number offset settings Step...

Page 94: ...the project number display status On the master unit press and hold SW6 to quit the address display status for all IDUs and return to the upper level If no quit button operations are performed on the...

Page 95: ...ction of compressor 1 H3 Inverter outdoor fan driver module reset Eb Top high temperature protection of compressor 2 H5 Inverter outdoor fan over current protection PL DC bus line over low voltage pro...

Page 96: ...nment temperature value is displayed Select a corresponding parameter value by pressing SW1 UP or SW2 DOWN Parameter Code Parameter Name Unit Remark 01 Outdoor environment temperature C 02 Operation f...

Page 97: ...wo digits and the lower two digits For example if 01 and 15 are alternately displayed it indicates 115 C If nE 00 and 28 are alternately displayed it indicates 28 C If a parameter is invalid for the u...

Page 98: ...ode Display Mode Parameter Code Display Mode nb On Un Blinking n Blinking LED1 LED2 LED3 Parameter Code Display Mode Parameter Code Display Mode Parameter Code Display Mode N1 On R0 On 12 On LED1 LED2...

Page 99: ...signal during the process of 10 Pre startup ODU valve status judging phase in step 11 the system will restore the completion phase of 9 Pre startup refrigerant judging phase in step 10 Continuing engi...

Page 100: ...m pump Electricity meter Electronic balance Timer System high and low pressure gauges for corresponding refrigerants Step ladder Wind speed transmitter The GMV5E VRF provides two commissioning methods...

Page 101: ...de for providing an analysis basis during refrigerating system testing 3 3 2 2 Installation Appearance Check Installation appearance check covers whether pipeline installation complies with specificat...

Page 102: ...ssure is normal 3 3 2 4 Electrical System Check 1 Check for high electromagnetic interference dusts and acidic or alkaline gas in the unit environment a The air conditioning unit can neither share the...

Page 103: ...le terminals connected with connectors must be tightened with a sleeve spanner or screwdriver and tightened once more after two months of normal operation Auxiliary contacts of AC connectors cannot be...

Page 104: ...oes the difference of level between IDUs comply with unit design requirements 8 Are long pipes of IDUs and ODUs less than or equal to 165 m 9 Is the total length of pipes less than 1000 m 10 Is the sp...

Page 105: ...commissioning 3 3 3 Step 3 Commissioning Operation 3 3 3 1 Precautions 1 Before starting commissioning make sure that the unit compressor has been preheated for more than eight hours and check whethe...

Page 106: ...nking The system is assigning addresses db On 02 On L7 Blinking There is not any master IDU and a master IDU should be set through the commissioning software If no master IDU is set within one minute...

Page 107: ...m detects component failure of ODU db On 06 On OC On The system detects that no ODU component fails and automatically enters the next step 07_Component detection for IDU db On 07 On XXXX Corresponding...

Page 108: ...properly opened 11_Manually calculated refrigerant perfusion status db On 11 On AE On The refrigerant perfusion status is manually calculated appended refrigerants must be accurately calculated 12_Un...

Page 109: ...issioning operation the system automatically selects the commissioning operation mode without needing manual settings db On 16 On Corresponding fault code On A fault occurs on the heating mode commiss...

Page 110: ...ain board of ODU the main board provides the following commissioning operation functions Step 1 Completely cover the front panel of ODU and open commissioning windows of all basic modules Step 2 In po...

Page 111: ...ding to the above fault symptoms set the master unit again by referring to the setting method in the Master Unit Setting DIP Switch SA8_MASTER S section Then enter unit commissioning again Exception 2...

Page 112: ...y Status Code Display Status Code Display Status 04_Indoor unit quantity confirmation db On 04 On Number of connected IDUs Blinking If the displayed quantity is consistent with the number of actually...

Page 113: ...ng Progress LED1 LED2 LED3 Code Display Status Code Display Status Code Display Status 06_Component detection for ODU db On 06 On OC On The system detects that no ODU component fails and automatically...

Page 114: ...ected that the compressor preheating period is less than eight hours an exception is prompted and the main board is displayed as follows In this case press SW7 to skip the waiting time and automatical...

Page 115: ...e completely opened press SW7 to enter the next commissioning step If it is detected that the unit valve status is normal the main board is displayed as follows and the unit automatically enters the n...

Page 116: ...ss LED1 LED2 LED3 Code Display Status Code Display Status Code Display Status 15_Cooling commissioning operation zDb On 15 On AC On The system is in cooling mode commissioning operation the system aut...

Page 117: ...es the standby status The main board is displayed as follows Commissioning Code Progress Code Status Code Meaning Progress LED1 LED2 LED3 Code Display Status Code Display Status Code Display Status 17...

Page 118: ...splay that the unit is in non commissioning status Step 6 Switch the commissioning software to the commissioning control interface Click Debug to switch to the engineering commissioning interface The...

Page 119: ...oning 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 whi...

Page 120: ...n detected on this phase which provides references for troubleshooting Click Close to close the information During commissioning click Stop to stop commissioning and then click Start to continue commi...

Page 121: ...VICE MANUAL 117 click Skip to skip the fault For other faults Skip is unavailable Commissioning steps 11 13 and 14 are reserved Steps 13 14 15 and 16 are parallel steps one of the four steps will be s...

Page 122: ...exceptions 3 3 3 2 3 Commissioning Through the Portable Commissioning Tool Step 1 Connect the Portable Commissioning Tool Please refer to the operation manual of Portable Commissioning Tool for the c...

Page 123: ...er Commissioning Sort and save data Make detailed records of exceptions and troubleshooting methods during commissioning for later maintenance and query At last make a commissioning report and hand it...

Page 124: ...value is 15 to 5 C 6 Opening degree of heating electronic expansion valves PLS During the cooling operation the heating electronic expansion valves always remain at 480 PLS During the heating operati...

Page 125: ...pansion valves PLS The opening degree automatically changes between 0 and 2000 PLS or between 0 and 480 PLS 16 Communication parameter Communication data The commissioning software shows that the numb...

Page 126: ...IP switch code is abnormal LH Alarm due to bad air quality dL Malfunction of air outlet temperature sensor LC IDU is not matching with outdoor unit dE Malfunction of indoor CO2 sensor LL Malfunction o...

Page 127: ...rn pipe is leaking b9 Malfunction of gas temperature sensor of heat exchanger P0 malfunction of driving board of compressor bA Malfunction of oil return temperature sensor 1 P1 Driving board of compre...

Page 128: ...C6 Alarm because ODU quantity is inconsistent U2 Wrong setting of ODU s capacity code jumper cap C7 Abnormal communication of converter U3 Power supply phase sequence protection C8 Emergency status o...

Page 129: ...ing n9 Check quantity of IDU on line AL Charge refrigerant automatically nA Heat pump unit AE Charge refrigerant manually nH Heating only unit AF Fan nC Cooling only unit AJ Cleaning reminding of filt...

Page 130: ...2 Replace the main board C0 Communication failure between indoor and ODUs and IDU s communicator 1 The communication cable is not connected 2 The communicator is disconnected 3 The communication cabl...

Page 131: ...such indoor unit exists it means its main board is abnormal and needs to be replaced If everything said above is confirmed OK continue to check according to step 3 3 The missing indoor units will disp...

Page 132: ...s are controlled in a centralized way When multiple cooling systems are controlled in a centralized way the C5 fault i e project number conflict may occur on different cooling systems In such case set...

Page 133: ...s numbers in multiple systems Choose Setting Parameter Settings as shown in Figure 2 Figure 2 If project commissioning is finished and the IDU where the conflict occurs needs to be set separately Clic...

Page 134: ...e conflicting IDU box shown in Figure 3 and click Set in the setting box Choose a value in the pop up box shown in Figure 4 and click Set Figure 4 If the conflict is solved the system will return to t...

Page 135: ...hen 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 th...

Page 136: ...ompressor drive board is powered off 3 The communication cable between the control board and compressor drive board is not connected 4 The compressor drive board s dial switch SA201 is wrong 1 Check t...

Page 137: ...ly of the control board Replace the control board if it works properly 2 Check the power supply of the drive board Replace the drive board if it works properly 3 Connect the main board and drive board...

Page 138: ...ust temperature of the IDU s coil is more than 15 C higher than the intake temperature when the IDU is working in the heating mode and the electronic expansion valve is opened to 2000PLS the intake te...

Page 139: ...pipe is frosting 3 3 1 The block is caused by solder Cut off the pipe to see if it is blocked Replace and solder the pipe 3 3 2 The pipeline is blocked by impurities Replace and solder the pipe 4 Lac...

Page 140: ...ch the tube to see if the electronic expansion valve is reset If it is set it is normal Otherwise it is faulty 1 2 1 The control wire of the electronic expansion valve is not connected to the main boa...

Page 141: ...pansion valve 2 2 2 The valve body is faulty Replace the body of the electronic expansion valve 3 Exhaust temperature sensor failure Replace the temperature sensor or main board 4 Too much refrigerant...

Page 142: ...f the pipe and check it Replace and solder the pipe 2 4 2 The pipeline is blocked by impurities Replace and solder the pipe 3 The ambient temperature is too high 3 1 In the cooling mode the outdoor te...

Page 143: ...ard 5 1 1 The pressure switch is not connected to the main board Reconnect it 5 1 2 The connect wire between the pressure switch and main board is faulty Reconnect them with the wire 5 2 The high pres...

Page 144: ...he fan s motor is damaged Other reasons Replace the motor 7 Too much refrigerant Other reasons Incorrect quantity of refrigerant is injected Check the necessary amount of refrigerant and discharge unn...

Page 145: ...ong the flowing direction of refrigerant to feel the temperature difference The difference is large or part of the pipe is frosting Replace and solder the pipe 2 4 The pipe that connects the IDU is bl...

Page 146: ...Reconnect the high and low pressure sensors 6 The fan is not working properly A The IDU s fan does not work in the cooling mode B The ODU s fan does not work in the heating mode 6 1 The IDU s fan is...

Page 147: ...c expansion valve is opened to the max the exhaust temperature of the IDU s coil is more than 5 C higher than the intake temperature B when the IDU is working in the heating mode and the electronic ex...

Page 148: ...s than 1 hour It is a normal phenomenon 3 1 2 An improper system is selected Choose another system with larger power 3 2 The outdoor ambient temperature in the cooling mode is higher than 40 C Measure...

Page 149: ...low pressure air pipe 2 2 4 Exception Analyzing and Troubleshooting 2 2 4 1 A0 Unit debug status Error display ODU mainboard IDU wired controller and IDU receive light board will display Error judgmen...

Page 150: ...ng mode the operating IDU will stop for 5 10 minutes Possible reason Troubleshooting status code no troubleshooting 2 2 4 5 A6 Cooling and heating function setting status Error display ODU mainboard w...

Page 151: ...will display Error judgment condition and method This code is status code which means the system has entered into cooling mode for operation Possible reason Troubleshooting status code no troubleshoo...

Page 152: ...ed Possible reason Troubleshooting status code no troubleshooting 2 2 4 14 AU Long distance control emergency stop status Error display ODU mainboard IDU wired controller and IDU receive light board w...

Page 153: ...Possible reason Troubleshooting status code no troubleshooting 2 2 4 17 b1 Outdoor ambient temperature sensor error Error display ODU mainboard IDU wired controller and IDU receive light board will d...

Page 154: ...n temperature sensor and terminal in mainboard interface Temperature sensor is abnormal Detecting circuit is abnormal Troubleshooting 2 2 4 19 b3 Defrost temperature sensor 2 error Error display ODU m...

Page 155: ...rror judgment condition and method Sample the AD value of temperature sensor through temperature sensor detecting circuit and judge the range of AD value if the sampled AD value exceeds upper limit an...

Page 156: ...ture sensor and terminal in mainboard interface Temperature sensor is abnormal Detecting circuit is abnormal Troubleshooting 2 2 4 22 b6 Malfunction of inlet tube temperature sensor of vapor liquid se...

Page 157: ...splay Error judgment condition and method Sample the AD value of temperature sensor through temperature sensor detecting circuit and judge the range of AD value if the sampled AD value exceeds upper l...

Page 158: ...ature sensor and terminal in mainboard interface Temperature sensor is abnormal Detecting circuit is abnormal Troubleshooting 2 2 4 25 b9 Malfunction of gas temperature sensor of heat exchanger Error...

Page 159: ...judgment condition and method Sample the AD value of temperature sensor through temperature sensor detecting circuit and judge the range of AD value if the sampled AD value exceeds upper limit and low...

Page 160: ...r loose Communication wire is cut off Communication wire is in poor connection Connected wired controller quantity or address setting is improper Controller is abnormal Troubleshooting If C0 isn t dis...

Page 161: ...er and IDU receive light board will display Error judgment condition and method If ODU hasn t received inverter compressor drive board data in continuous 30s report the error Possible reason Communica...

Page 162: ...wired controller and IDU receive light board will display Error judgment condition and method If ODU hasn t received inverter fan drive board data in continuous 30s report the error Possible reason C...

Page 163: ...oard IDU wired controller and IDU receive light board will display Error judgment condition and method If ODU hasn t received inverter fan drive board data in continuous 30s report the error Possible...

Page 164: ...board that is ever used in other system Troubleshooting You can reset the conflict IDU project codes through the following ways Reset project codes through debugging software Reset project codes throu...

Page 165: ...isplay ODU mainboard will display Error judgment condition and method If any fan in the module is set with emergency operation status the mainboard will display C9 to indicate that the system has ente...

Page 166: ...ne IDUs and ODUs When the ratio between total rated capacity of IDUs and total rated capacity of ODUs is less than 0 5 the unit will limit unit on and report this error Possible reason Total rated cap...

Page 167: ...ontrolling unit to judge if it is master controlling unit When multiple master controlling units are detected in the communication network of multiple modules system it will report this error Possible...

Page 168: ...systems shall be set in different codes DIP switch is abnormal or mainboard is abnormal Troubleshooting 2 2 4 41 CP Multiple master wired controller error Error display ODU mainboard IDU wired control...

Page 169: ...the IDU and ODU mainboard ODU is not de energized Troubleshooting 2 2 4 43 d1 Indoor circuit board error Error display IDU wired controller and IDU receive light board will display Error judgment cond...

Page 170: ...ure sensor is abnormal Detecting circuit is abnormal Troubleshooting 2 2 4 45 d4 Inlet pipe temperature sensor error Error display IDU wired controller and IDU receive light board will display Error j...

Page 171: ...r through temperature sensor detecting circuit and judge the range of AD value If the sampling AD value exceeds upper limit and lower limit in 5 seconds continuously report the error Possible reason P...

Page 172: ...sly report the error Possible reason Poor contact between humidity sensor and terminal in mainboard interface Humidity sensor is abnormal Detecting circuit is abnormal Troubleshooting 2 2 4 48 d9 Jump...

Page 173: ...t report the error Possible reason ODU allocated address is wrong IDU treatment is wrong Address chip is abnormal Troubleshooting 2 2 4 50 dH wired controller circuit board error Error display IDU wir...

Page 174: ...bnormal Troubleshooting 2 2 4 52 dL Air outlet temperature sensor error Error display IDU wired controller and IDU receive light board will display Error judgment condition and method Sample the AD va...

Page 175: ...controller and IDU receive light board will display Error judgment condition and method Judge through high pressure sensor detecting system real time high pressure or action of high pressure switch I...

Page 176: ...GMV5E DC INVERTER VRF UNITS SERVICE MANUAL 172 Troubleshooting 2 2 4 55 E2 Compressor low discharge temperature protection Error display ODU mainboard IDU wired controller and IDU receive light board...

Page 177: ...ue is lower than 10 C the unit will stop for protection Possible reason Exhaust temperature sensor failure In cooling mode The IDU s electronic expansion valve is not working properly In heating mode...

Page 178: ...pressure value is lower than 41 C the unit will stop for protection Possible reason Cut off valve of ODU is not fully opened Low pressure sensor is abnormal Outdoor or indoor fan is not working prope...

Page 179: ...e Check if electronic expansion valves of indoor and outdoor units work properly Check if the return air filter of the indoor unit is dirty or blocked The pipeline is blocked Clean the filter Replace...

Page 180: ...rature through compressor discharge pipe and shell top temperature sensor If the tested temperature value is higher than 118 C the unit will stop for protection Possible reason Cut off valve of ODU is...

Page 181: ...GREE GMV5E DC INVERTER VRF UNITS SERVICE MANUAL 177 Troubleshooting 2 2 4 58 F0 ODU mainboard error Error display ODU mainboard IDU wired controller and IDU receive light board will display...

Page 182: ...sor error Error display ODU mainboard IDU wired controller and IDU receive light board will display Error judgment condition and method Sample the AD value of high pressure sensor through sensor detec...

Page 183: ...value of low pressure sensor through sensor detecting circuit and judge the range of AD value if the sampled AD value exceeds upper limit and lower limit in 30 seconds continuously report the error P...

Page 184: ...ent condition and method Sample the AD value of temperature sensors through temperature sensors circuit and judge the range of AD value if the sampled AD value exceeds upper limit and lower limit in 3...

Page 185: ...or judgment condition and method Sample the AD value of temperature sensors through temperature sensors circuit and judge the range of AD value if the sampled AD value exceeds upper limit and lower li...

Page 186: ...or judgment condition and method Sample the AD value of temperature sensors through temperature sensors circuit and judge the range of AD value if the sampled AD value exceeds upper limit and lower li...

Page 187: ...or judgment condition and method Sample the AD value of temperature sensors through temperature sensors circuit and judge the range of AD value if the sampled AD value exceeds upper limit and lower li...

Page 188: ...or judgment condition and method Sample the AD value of temperature sensors through temperature sensors circuit and judge the range of AD value if the sampled AD value exceeds upper limit and lower li...

Page 189: ...or judgment condition and method Sample the AD value of temperature sensors through temperature sensors circuit and judge the range of AD value if the sampled AD value exceeds upper limit and lower li...

Page 190: ...play Error judgment condition and method Sample the AD value of current sensor through detecting circuit and judge the range of AD value if the sampled AD value exceeds upper limit and lower limit in...

Page 191: ...play Error judgment condition and method Sample the AD value of current sensor through detecting circuit and judge the range of AD value if the sampled AD value exceeds upper limit and lower limit in...

Page 192: ...or judgment condition and method Sample the AD value of current sensor through detecting circuit and judge the range of AD value if the sampled AD value exceeds upper limit and lower limit in 3 second...

Page 193: ...it sensor and terminal in mainboard interface Small board of circuit sensor is abnormal Detecting circuit is abnormal Troubleshooting 2 2 4 71 FF Compressor 5 current sensor error Error display ODU ma...

Page 194: ...play Error judgment condition and method Sample the AD value of current sensor through detecting circuit and judge the range of AD value if the sampled AD value exceeds upper limit and lower limit in...

Page 195: ...udgment condition and method Sample the AD value of temperature sensor through temperature sensor detecting circuit and judge the range of AD value If the sampling AD value exceeds upper limit and low...

Page 196: ...udgment condition and method Sample the AD value of temperature sensor through temperature sensor detecting circuit and judge the range of AD value If the sampling AD value exceeds upper limit and low...

Page 197: ...s H7 Fan drive IPM high temperature protection Nixie tube on ODU main control board displays H8 Fan drive current detecting circuit error Nixie tube on ODU main control board displays HC Fan drive cha...

Page 198: ...display IDU wired controller will display Error judgment condition and method Check the error code on IDU wired controller If IDU wired controller displays H2 you should also check the error code on n...

Page 199: ...board will display Error judgment condition and method Check the error code on nixie tube of ODU main control board If H5 is displayed it indicates inverter fan overcurrent protection Possible reason...

Page 200: ...board will display Error judgment condition and method Check the error code on nixie tube of ODU main control board If H6 is displayed it indicates Drive IPM module protection of fan Possible reason P...

Page 201: ...n drive temperature sensor error Error display ODU mainboard will display Error judgment condition and method Check the error code on nixie tube of ODU main control board If H7 is displayed it indicat...

Page 202: ...dgment condition and method Check the error code on nixie tube of ODU main control board If H8 is displayed it indicates fan drive IPM high temperature protection Possible reason Thermal grease of IPM...

Page 203: ...ay Error judgment condition and method Check the error code on nixie tube of ODU main control board If H9 is displayed it indicates Desynchronizing protection of inverter compressor Possible reason Po...

Page 204: ...ates AC input voltage of drive of inverter fan Possible reason Fan drive board is abnormal Troubleshooting 2 2 4 85 HH fan drive DC bus high voltage protection Error display ODU mainboard will display...

Page 205: ...ection Possible reason Power supply voltage is lower than 320V Fan drive board is abnormal Troubleshooting 2 2 4 87 HJ Failure startup of inverter fan Error display ODU mainboard will display Error ju...

Page 206: ...receive light board will not display Error judgment condition and method In multiple modules system if any module causes system stoppage the modules without errors will display this error to indicate...

Page 207: ...ontroller and IDU receive light board will display Error judgment condition and method Check the operation current of compressor through current sensor or circuit When current exceeds the limit the un...

Page 208: ...ontroller and IDU receive light board will display Error judgment condition and method Check the operation current of compressor through current sensor or circuit When current exceeds the limit the un...

Page 209: ...ontroller and IDU receive light board will display Error judgment condition and method Check the operation current of compressor through current sensor or circuit When current exceeds the limit the un...

Page 210: ...ontroller and IDU receive light board will display Error judgment condition and method Check the operation current of compressor through current sensor or circuit When current exceeds the limit the un...

Page 211: ...ontroller and IDU receive light board will display Error judgment condition and method Check the operation current of compressor through current sensor or circuit When current exceeds the limit the un...

Page 212: ...ontroller and IDU receive light board will display Error judgment condition and method Check the operation current of compressor through current sensor or circuit When current exceeds the limit the un...

Page 213: ...ay Error judgment condition and method Check the system high pressure and low pressure through pressure sensor When the difference between system high pressure and low pressure is lower than 0 1MPa af...

Page 214: ...nit will stop for protection Possible reason Pressure sensor is abnormal Ambient temperature exceeds the requirement Troubleshooting 2 2 4 97 J9 System low pressure ratio protection Error display ODU...

Page 215: ...er and IDU receive light board will display Error judgment condition and method Check if the rotation speed of IDU is too slow or it stops rotation or protection signal of outdoor fan is transferred I...

Page 216: ...leshooting 2 2 4 99 L3 Water full protection Error display IDU wired controller and IDU receive light board will display Error judgment condition and method Check the status of IDU float switch When w...

Page 217: ...E DC INVERTER VRF UNITS SERVICE MANUAL 213 full protection happens Possible reason IDU is installed improperly Drainage pump is broken Float switch operates abnormally IDU mainboard is abnormal Troubl...

Page 218: ...er supply conducting wire of wired controller is short circuited IDU mainboard is abnormal Mainboard of wired controller is abnormal Troubleshooting 2 2 4 101 L5 Freeze protection Error display IDU wi...

Page 219: ...or display IDU wired controller and IDU receive light board will display Error judgment condition and method No master IDU error will happen when there is no master IDU in the system Possible reason M...

Page 220: ...oup controlled IDU quantity Possible reason IDU quantity connected with one wired controller exceeds 16 sets Actually connected IDU quantity is inconsistent with the set group controlled IDU quantity...

Page 221: ...play ODU mainboard IDU wired controller and IDU receive light board will display Error judgment condition and method This code is function setting status code which indicates that the system has enter...

Page 222: ...ossible reason Troubleshooting status code no troubleshooting 2 2 4 110 n7 Unit parameter inquiry status Error display ODU mainboard IDU wired controller and IDU receive light board will display Error...

Page 223: ...nd method This code is the heating only model status code which indicates that the system has been set to heating only unit status The IDUs can only operate in heating mode Possible reason Troubleshoo...

Page 224: ...on the nixie tube of ODU main control board Compressor drive temperature sensor error P7 is displayed on the nixie tube of ODU main control board Compressor drive IPM high temperature protection P8 is...

Page 225: ...ode through IDU wired controller If IDU wired controller displays P2 please also check the error code displayed on the nixie tube of ODU main control board Detailed error of compressor drive board can...

Page 226: ...ay Error judgment condition and method Check the error code on nixie tube of ODU main control board If P5 is displayed it indicates inverter compressor overcurrent protection Possible reason Poor cont...

Page 227: ...compressor IPM protection Error display ODU mainboard will display Error judgment condition and method Check the error code on nixie tube of ODU main control board If P6 is displayed it indicates inve...

Page 228: ...e of compressor UVW wire is wrong Compressor is broken System is blocked Compressor drive board IPM module is broken Troubleshooting 2 2 4 124 P7 Compressor drive board temperature sensor error Error...

Page 229: ...nixie tube of ODU main control board If P8 is displayed it indicates compressor drive board IPM high temperature protection occurs Possible reason Screw of IPM module is not tightened Thermal grease o...

Page 230: ...GREE GMV5E DC INVERTER VRF UNITS SERVICE MANUAL 226 Possible reason Compressor is broken Fan drive board is abnormal Troubleshooting...

Page 231: ...error Possible reason Compressor drive board is abnormal Troubleshooting 2 2 4 128 PH Compressor drive DC bus high voltage protection Error display ODU mainboard will display Error judgment condition...

Page 232: ...reason Power supply voltage is lower than 320V Compressor drive board is abnormal Troubleshooting 2 2 4 130 PJ Inverter compressor startup failure Error display ODU mainboard will display Check the e...

Page 233: ...GREE GMV5E DC INVERTER VRF UNITS SERVICE MANUAL 229 Troubleshooting...

Page 234: ...board IDU wired controller and IDU receive light board will display Error judgment condition and method ODU mainboard detects that the capacity code doesn t comply with the actual unit capacity or ODU...

Page 235: ...controller and IDU receive light board will display Error judgment condition and method Check the system high pressure and low pressure through pressure sensor When the system high pressure and low p...

Page 236: ...error Error display ODU mainboard IDU wired controller and IDU receive light board will display Error judgment condition and method During commissioning check if IDU pipeline is blocked through detec...

Page 237: ...od This code is status code not an error During commissioning it indicates that setting of master IDU is done Possible reason Troubleshooting 2 2 4 139 UL Compressor emergency operation DIP switch err...

Page 238: ...of refrigerant 2 2 4 141 Poor cooling and heating performances Error judgment condition and method 1 When electronic expansion valve is opened to 2000PLS in cooling operation of IDU and IDU coil outle...

Page 239: ...GREE GMV5E DC INVERTER VRF UNITS SERVICE MANUAL 235 Troubleshooting...

Page 240: ...ule as shown in the figure below DIP setting position DIP setting position DIP setting position DIP setting position Master module state Slave module state AP1 LED When a master module is powered on L...

Page 241: ...ntire system after master module AP1 replacement System parameter setting After system debug reset system parameters For details refer to section 1 ODU Function Setting in part II chapter III 3 1 1 3...

Page 242: ...nd P36 to default values If the IDU is configured with wireless control use the special control YV1L1 to set P35 and P36 to default values If the IDU is configured with wireless control and special co...

Page 243: ...t P42 to a new project number Method 2 If the IDU is configured with lamp board use the special control YV1L1 to set P42 to a new project number Method 3 If the IDU is configured with the Debugger con...

Page 244: ...If the wired control to be replaced controls multiple IDUs perform the steps below first Set the wired control parameter P14 to change the number of managed IDUs to the actual quantity the control ma...

Page 245: ...If the wired control needs an access control system set switch 1 for DIP S1 at the bottom of the wired control to ON neglect switch 2 and connect the access control card interface to ports N and L or...

Page 246: ...e and condensing temperature while the compressors work at 60 Hz Compressor Current A Evaporating Temp C Condensing Temp C The figure below shows current curves that change with evaporating temperatur...

Page 247: ...30 Hz The figure below shows current curves that change with evaporating temperature and condensing temperature while the compressor works at 60 Hz Current curve Condensing temp Evaporating temp C Sec...

Page 248: ...temperature and condensing temperature while the compressors work at 30 Hz The figure below shows current curves that change with evaporating temperature and condensing temperature while the compresso...

Page 249: ...e the compressors work at 30 Hz The figure below shows input that change with evaporating temperature and condensing temperature while the compressors work at 60 Hz The figure below shows input that c...

Page 250: ...sion 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...

Page 251: ...7 Description of electric expansion valve Four way valve While this valve is normally running the four copper pipes connected to it will suffer different temperature When a unit switches to act the va...

Page 252: ...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 D...

Page 253: ...ake sure the moisture proof tape is removed In normal cases the multimeter should read 0 39 0 3 V If it is 0 or infinitely great the IPM module is faulty 3 As shown in the figure below put the black t...

Page 254: ...As shown in the figure below put the black test probe to pad U BL and the red test probe to pad NU make sure the moisture proof tape is removed In normal cases the multimeter should read 0 39 0 3 V If...

Page 255: ...f the units and open the electric junction box of the compressor to see whether wiring of the compressor is intact Step 2 Measure resistance between two wiring terminals U V W The resistance value ran...

Page 256: ...rning sign beside the power switch to prevent electric shock Step 2 Check oil quality Before releasing the refrigerant get some freezing oil through the oil checking valve Connect a rubber hose to the...

Page 257: ...he valves Step 4 Remove faulty compressors Confirm faulty compressors including number of faulty ones compressor position and model If the inverter compressor is damaged or the oil of the fixed speed...

Page 258: ...should be kept intact for further analysis Step 5 Check system parts If system oil is contaminated check unit parts including oil separator gas liquid separator and storage tank Check oil separator R...

Page 259: ...impurities The check procedure is as follows Use a glass container to hold the liquid Check liquid impurities and colours and block the container for further factory inspection Note If the compressor...

Page 260: ...s with tapes They should be kept intact for further analysis Note Volumes of oils drawn out from the oil separator gas separator and oil balancer should be recorded After faulty compressors and parts...

Page 261: ...emove the oil balance filter to see whether it is blocked If yes replace the filter 4 Blow nitrogen into the balance pipes filters to clean them 1 Disconnect the pipes at both sides of the oil balance...

Page 262: ...ar oil return pipes 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 preventi...

Page 263: ...w 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...

Page 264: ...ng rods you should also prepare special welding rods containing 5 or more silver Compressors inlets and outlets are made of copper plated steels which require special welding rods and materials 3 Prep...

Page 265: ...e or directly connect the nitrogen source to the inlet outlet pipe If the pipe is big cover it with tape as well Make sure nitrogen can smoothly flow through the gas separator Step 9 Install a new oil...

Page 266: ...g wiring or inverse connection of the compressors may cause damage to units Cautions on replacement of compressors Before installing new compressors remove the sealing rubbers and weld the compressors...

Page 267: ...hours later temperature decreases to 25 C and pressure decreases to 2 43 MPa accordingly The system is regarded qualified despite the pressure decrease Step 13 Fill lubricant When a compressor is repl...

Page 268: ...ness of fill amount Step 14 Vacuum pump After lubricant is added keep on extracting air through a vacuum pump till the internal pressure reaches the absolute pressure 0 kgf cm2 and the pressure gauge...

Page 269: ...ter value is 3 C or more the refrigerant quality is unsatisfactory 2 If the refrigerant is proved satisfactory fill refrigerant of the combined amount of the rated amount specified on the nameplate an...

Page 270: ...f the lines L1 L2 L3 and N The measuring result should be 0 V sometimes multimeters may be faulty and read false values Set a mark beside the power supply for warning 2 Measure compressor drive DC bus...

Page 271: ...he drive communication line between the compressor drive and fan drive compressor drive output 18 VDC bridge rectifier output P bridge rectifier output N compressor drive output 540 VDC reactor s wiri...

Page 272: ...ce the compressor drive Before the replacement apply some silicone tape onto the IPM module Apply some silicone tape on it evenly 6 Install a new compressor drive screw and wire it U blue V yellow W r...

Page 273: ...lower panel are fixed with two fasteners respectively to connect to the side panels 2 Disconnect the power line of the compressor and remove the electric heating belt top temperature sensor and disch...

Page 274: ...a proper position Use a wrench to screw the nuts on the compressor The compressor should not be installed upside down 7 Connect the suction and discharge pipes of the compressor to the pipeline syste...

Page 275: ...and tighten the screws Four way valve 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 b...

Page 276: ...of the valve and position of the pipe joints Note Avoid nearby 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 va...

Page 277: ...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 1 Loosen the hooks at...

Page 278: ...d nearby parts from being burnt during welding 4 Remove the electric expansion valve Remove the electric expansion valve 5 Install a new electric expansion valve Weld the connecting pipes with the ele...

Page 279: ...anels and tighten the screws Oil 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 t...

Page 280: ...four pipe joints of the oil separator by welding and remove the connecting pipes Note Avoid nearby parts from being burnt during welding 4 Remove the oil separator Remove the oil separator from the c...

Page 281: ...s 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 exi...

Page 282: ...ve the electric box Disconnect internal and external connecting lines of the electric box Protect the internal parts during the disassembly 3 Disassemble the gas liquid separator Heat the connecting p...

Page 283: ...ge pipes and weld the pipes with the gas liquid separator During welding charge nitrogen into the pipes The pressure should be controlled within 0 5 0 1 kgf cm2 relative pressure Note Avoid nearby par...

Page 284: ...iver to unscrew the electric box 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 hea...

Page 285: ...ng 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 controlled with...

Page 286: ...r Grill 01574105 1 01574105 1 2 Top Cover 01264230 1 01264230 1 3 Diversion Circle 10474100 1 10474100 1 4 Fan motor Sub Assy 15404605 1 15404605 1 5 Axial Flow Fan Sub Assy 10338702 1 10338702 1 6 Fa...

Page 287: ...Assy 07334100030 1 07334100030 1 31 Left Side Plate 01314712P 1 01314712P 1 32 Chassis Sub assy 01194708 1 01194708 1 33 Gas liquid Separator 07424188 1 07424188 1 34 Base Frame Assy 01284711 1 01284...

Page 288: ...ame of part GMV 280WM E1 X Product Code CN851W2200 Part code Quantity 1 Rear Grill 01574105 1 2 Top Cover 01264230 1 3 Diversion Circle 10474100 1 4 Fan motor Sub Assy 15404605 1 5 Axial Flow Fan Sub...

Page 289: ...re Switch 4602000911 1 46 Discharge Tube Sub assy 04534100050 1 47 Front Panel 01544627P 1 48 Handle 26904100016 2 49 Front Panel 01544620P 1 50 Temperature Sensor Sub Assy 39008000006G 1 51 Pressure...

Page 290: ...1 3 Diversion Circle 10474100002 2 4 Motor for Axial Fan Assy 15404100018 2 5 Axial Flow Fan 10434100002 1 6 Fan Motor 15704124 1 7 Gas By pass sub assy 04634100012 1 8 Magnet Coil 4304000420 1 9 Fil...

Page 291: ...01194100069P 1 34 Base Frame Assy 01284100002 1 35 Liquid Valve Sub Assy 07304100009 1 36 Cut off Valve 07334100013 1 37 Valve 07304100007 1 38 Cut off Valve 07334100011 1 39 Gas Hose Sub Assy 0457410...

Page 292: ...4100192 1 66 Filter Board 30228000015 1 67 Reactor 43138000034 1 68 Rectifier 46010604 1 69 Main Board 30228000010 1 70 Main Board 30229009 1 71 Radiator 49018000002 1 72 Radiator 49018000001 2 73 Ter...

Page 293: ...Electronic Expansion Valve Fittings 4304413204 1 4304413204 1 19 Electronic Expansion Valve 07331139 1 07331139 1 20 Discharge Valve 07334100002 2 07334100002 2 21 Electronic Expansion Valve Fittings...

Page 294: ...4602000912 1 60 Exhaust Trunk Sub Assy 04534100012 1 04534100012 1 61 Check Valve 07333700032 2 07333700032 2 62 Gas By pass Sub Assy 04514100036 1 04514100036 1 63 Magnet Coil 4304000402 1 430400040...

Page 295: ...P 1 01264100006P 1 3 Diversion Circle 10474100002 2 10474100002 2 4 Axial Flow Fan 10434100002 2 10434100002 2 5 Fan Motor 15704124 2 15704124 2 6 Nozzle for Adding Freon 06120012 2 06120012 2 7 One w...

Page 296: ...42418601 1 34 Compressor and Fittings 00204100008 2 00204100008 2 35 Reactor Sub assy 01394100449 1 01394100449 1 36 Reactor 4313017403 2 4313017403 2 37 Top Cover front 01264100004P 2 01264100004P 2...

Page 297: ...000054 4 11 Strainer 07415200002 6 07415200002 6 12 Upper Cover Plate back 01264100005P 1 01264100005P 1 13 Rear Grill 016001500381 1 016001500381 1 14 Condenser Assy 01100250016201 1 01100250016201 1...

Page 298: ...39008000102G 1 39008000102G 1 53 Pressure Protect Switch 4602000912 1 4602000912 1 54 Right Side Plate 012056500021P 1 012056500021P 1 55 Electric Box Assy 01394100426 1 01394100426 1 56 Radiator 4901...

Page 299: ...6 12 8 50 30 3 17 4 51 17 13 2 52 31 7 16 4 67 18 13 6 54 33 2 15 4 84 19 14 0 56 34 7 14 5 02 20 14 4 58 36 3 13 5 19 21 14 7 60 37 9 12 5 38 22 15 2 62 40 17 11 5 57 23 15 6 65 42 78 10 5 76 24 16 0...

Page 300: ...5 0 873 3 119 15 23 6 1 282 106 0 848 3 123 16 22 53 1 319 107 0 825 3 128 17 21 51 1 356 108 0 802 3 133 18 20 54 1 393 109 0 779 3 137 19 19 63 1 429 110 0 758 3 141 20 18 75 1 467 111 0 737 3 145 2...

Page 301: ...243 3 247 66 2 998 2 75 156 0 237 3 249 67 2 898 2 766 157 0 232 3 25 68 2 797 2 781 158 0 227 3 251 69 2 702 2 796 159 0 222 3 252 70 2 611 2 811 160 0 217 3 253 2 Voltage list of 20 k pipeline temp...

Page 302: ...4 9 41 84 1 067 105 1 164 3 119 10 39 87 1 102 106 1 131 3 123 11 38 01 1 138 107 1 099 3 128 12 36 24 1 174 108 1 069 3 133 13 34 57 1 209 109 1 039 3 137 14 32 98 1 246 110 1 01 3 141 15 31 47 1 282...

Page 303: ...2 2 607 154 0 3312 3 246 59 5 13 2 626 155 0 3237 3 247 60 4 948 2 646 156 0 3164 3 249 61 4 773 2 664 157 0 3093 3 25 62 4 605 2 682 158 0 3024 3 251 63 4 443 2 7 159 0 2956 3 252 64 4 289 2 717 160...

Page 304: ...7 113 37 0 267 98 3 5143 2 442 8 107 96 0 28 99 3 4128 2 46 9 102 85 0 292 100 3 3147 2 478 10 98 006 0 306 101 3 22 2 496 11 93 42 0 319 102 3 1285 2 514 12 89 075 0 333 103 3 0401 2 531 13 84 956 0...

Page 305: ...0667 2 982 54 15 173 1 311 145 1 0429 2 988 55 14 618 1 34 146 1 0197 2 995 56 14 085 1 37 147 0 9971 3 001 57 13 575 1 4 148 0 9752 3 007 58 13 086 1 429 149 0 9538 3 013 59 12 617 1 459 150 0 9331 3...

Page 306: ...3300 3 432 2 754 0 718 54 3374 3 511 1 779 0 745 55 3450 3 592 0 804 0 772 56 3528 3 675 1 830 0 799 57 3606 3 759 2 857 0 828 58 3686 3 844 3 884 0 857 59 3767 3 93 4 912 0 887 60 3849 4 018 5 940 0...

Page 307: ...1159 2 615 43 154 0 605 13 1193 2 683 42 161 0 619 14 1228 2 753 41 168 0 633 15 1263 2 823 40 176 0 649 16 1300 2 897 39 184 0 665 17 1337 2 971 38 193 0 683 18 1375 3 047 37 202 0 701 19 1413 3 123...

Page 308: ...JF00303085...

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