Page 1 FULL DC INVERTER SYSTEMS SERVICE MANUAL OUTDOOR UNITS SDV6-ExxxASI C O M M E R C I A L A I R C O N D I T I O N E R S S D V 6...
Page 2: Important Note
Original instructions IMPORTANT NOTE: Read this manual carefully before installing or operating your new air conditioning unit. Make sure to save this manual for future reference.
Page 3 For downloading manual for this pro- Um das Handbuch für dieses Produkt duct, please enter the model name at herunterzuladen, geben Sie bitte den this link: Modellnamen für diesen Link ein: Para descargar el manual de este pro- Per scaricare il manuale di questo pro- ducto, ingrese la designación del mo- dotto, inserisci il nome del modello a delo en el siguiente enlace:...
Page 4 CONTENTS Part 1 General Information ................ 3 Part 2 Component Layout and Refrigerant Circuits ........ 17 Part 3 Control .................... 26 Part 4 Field Settings ................. 48 Part 5 Electrical Components and Wiring Diagrams ....... 62 Part 6 Diagnosis and Troubleshooting ............. 75...
Page 5: General Information
Part 1 General Information 1 Indoor and Outdoor Unit Capacities ............4 2 External Appearance .................. 6 3 Nomenclature .................... 8 4 Combination Ratio ................... 11 5 Selection Procedure ................. 12...
Page 6 1 Indoor and Outdoor Unit Capacities 1.1 Indoor Units 1.1.1 Standard indoor units Table 1-1.1: Standard indoor unit abbreviation codes Abbreviation Abbreviation Type Type code code One-way Cassette High Static Pressure Duct Wall-mounted Compact Four-way Cassette Ceiling & Floor Four-way Cassette Floor Standing (Exposed/Concealed) Arc Duct Medium Static Pressure Duct...
Page 7: Outdoor Units
1.3 Outdoor Units Table 1-1.5: Outdoor unit capacity range Capacity Model Name Combination Type SDV6-E252ASI 10HP SDV6-E280ASI 12HP SDV6-E335ASI 14HP SDV6-E400ASI 16HP SDV6-E450ASI 18HP SDV6-E500ASI 20HP SDV6-E560ASI 22HP SDV6-E615ASI Notes: outdoor units could not be combined.
Page 8: External Appearance
2 External Appearance 2.1 Indoor Units 2.1.1 Standard indoor units Table 1-2.1: Standard indoor unit appearance One-way Cassette Compact Four-way Cassette Four-way Cassette Medium Static Pressure Duct Duct High Static Pressure Duct Wall-mounted Ceiling & Floor Floor Standing 2.2 Heat Recovery Ventilator Table 1-2.3: Heat recovery ventilator appearance Heat Recovery Ventilator...
Page 9 2.3 Outdoor Units 2.3.1 Single units Table 1-2.4: Single outdoor unit appearance 8/10/12/14HP 16/18/20/22HP...
Page 10: Side Discharge
3.2 Outdoor Units SDV6 Sinclair – DC invertor variable Outdoor unit Cooling capacity (x100W) Refrigerant (R410) Side discharge Individual 4 Combination Ratio Sum of capacity indexes of the indoor units Combination ratio = Capacity index of the outdoor units Table 1-5.1: Indoor and outdoor unit combination ratio limitations...
Page 11: Selection Procedure
5 Selection Procedure 5.1 Procedure Step 1: Establish design conditions Design temperature and humidity (indoor and outdoor) Required heat load of each room System peak load Piping length, level differences Indoor unit specifications (type and quantity) Step 2: Select indoor units Decide indoor unit safety factor Select indoor unit models ensuring that: Indoor unit capacity corrected for indoor air temperature WB...
Page 12 5.2 Example The following is a selection example based on total heat load for cooling. Figure 1-6.1: Room plan Room H Room G Room A Room F Room B Room E Room C Room D Step 1: Establish design conditions ...
Page 13 Table 1-6.2: Extract from medium static pressure duct (T2) cooling capacity table Indoor air temperature Capacity 14°C WB 16°C WB 18°C WB 19°C WB 20°C WB 22°C WB 24°C WB Model index 20°C DB 23°C DB 26°C DB 27°C DB 28°C DB 30°C DB 32°C DB...
Page 14 Table 1-6.5: Extract from Table 1-5.2 Combinations of Indoor and outdoor units Outdoor unit capacity Sum of capacity indexes of Maximum number of connected indoor units (standard connected indoor Capacity indoor units only) units index 25.2 126 to 327.6 140 to 364 33.5 167.5 to 435.5 40.0...
Page 15 Find the correction factor for piping length and level difference (“K1”) Figure 1-6.3: EasyFit rate of change in cooling capacity K1=0.927 20 30 40 50 60 70 80 90 100 110 120 130 140 150 Notes: The horizontal axis shows equivalent length of piping between farthest indoor unit and first outdoor branch joint;...
Page 16: Refrigerant Circuits
Part 2 Component Layout and Refrigerant Circuits 1 Layout of Functional Components ............18 2 Piping Diagrams ..................20 3 Refrigerant Flow Diagrams ..............23...
Page 17 1 Layout of Functional Components 1.1 8-14HP layout of functional components Figure 2-1.1: 8-14HP layout of functional component Legend Parts name Parts name Stop valve (liquid side) Compressor Oil separator Electronic expansion valve (EEVC) High pressure switch Electronic expansion valve (EEVE)(Optional) Check value Injection bypass solenoid valve(SV5) Four-way valve...
Page 18 1.2 16-22HP layout of functional components Figure 2-1.2: 16-22HP layout of functional components Legend Parts name Parts name Stop valve (liquid side) Compressor Oil separator Electronic expansion valve (EEVC) High pressure switch Electronic expansion valve (EEVE)(Optional) Check value Injection bypass solenoid valve(SV5) Four-way valve Compressor vapor injection valve (SV8A) High pressure sensor...
Page 19: Piping Diagrams
2 Piping Diagrams 2.1 8-14HP piping diagram Figure 2-2.1: 8-14HP piping diagram Legend Parts name Parts name Compressor Charge port Oil separator Low pressure sensor High pressure switch Gas-liquid separator Check value Muffler Four-way valve Heat exchanger High pressure sensor Sensor Code Description Main exchanger pipe temperature sensor...
Page 20 2.2 16-22HP piping diagram Figure 2-2.2: 16-22HP piping diagram Legend Parts name Parts name Compressor Charge port Oil separator Low pressure sensor High pressure switch Gas-liquid separator Check value Muffler Four-way valve Heat exchanger High pressure sensor Sensor Code Description Main exchanger pipe temperature sensor Microchannel heat exchanger Outdoor ambient temperature sensor...
Page 21: Four-Way Valve
2.3 Key components 1. Oil separator: Separates oil from gas refrigerant pumped out of the compressor and quickly returns it to the compressor. Separation efficiency is up to 99%. 2. Gas-liquid separator: Separates liquid refrigerant from gas refrigerant, stores liquid refrigerant and oil to protect compressor from liquid hammering.
Page 22 Refrigerant Flow Diagrams 3.1 Cooling operation Figure 2-3.1: 8-22HP refrigerant flow during cooling operation Note： There is no SV8A for 20/22HP outdoor units. 3.2 Heating operation Figure 2-3.2: 8-22HP refrigerant flow during heating operation Note： There is no SV8A for 20/22HP outdoor units...
Page 23 3.3 Oil return operation in cooling mode Figure 2-3.3: 8-22HP refrigerant flow during oil return operation in cooling mode Note： There is no SV8A for 20/22HP outdoor units. 3.4 Oil return operation in heating mode and defrosting operation (4-way valve change direction) Figure 2-3.4: 8-22HP refrigerant flow during oil return operation in heating mode and defrosting operation (4-way valve change direction) Note：...
Page 24 3.5 Oil return operation in heating mode (4-way valve keep in the same direction) Figure 2-3.5: 8-22HP refrigerant flow during oil return operation in heating mode (4-way valve keep in the same direction) Note： There is no SV8A for 20/22HP outdoor units.
Page 25: Table Of Contents
Part 3 Control 1 General Control Scheme Flowchart ............27 2 Stop Operation ..................28 3 Standby Control ..................29 4 Startup Control ..................29 5 Normal Operation Control ............... 32 6 Protection Control ................... 38 7 Special Control ..................42 8 Other Control ...................
Page 26: General Control Scheme Flowchart
1 General Control Scheme Flowchart Sections 2 to 8 on the following pages detail when each of the controls in the flowchart below is activated. Stop operation  Abnormal shutdown  System stops  A unit stops when the load demanded decreases Standby control Special control ...
Page 27: Stop Operation
2 Stop Operation The stop operation occurs for one of the three following reasons: Abnormal shutdown: in order to protect the compressors, if an abnormal state occurs，the system will makes a 'stop with thermos-off' operation and an error code will be displayed on the outdoor unit digital displays. The system stops when the set temperature of all indoor unit has been reached, or all indoor units has stop or error.
Page 28: Standby Control
3 Standby Control 3.1 Crankcase Heater Control The crankcase heater is used to prevent refrigerant from mixing with compressor oil when the compressors are stopped. The crankcase heater is controlled mainly according to the minimum of discharge temperatures. When the minimum of discharge temperatures is above 45°C, the crankcase heater is off; When the minimum of discharge temperatures is below 40°C, the crankcase heater turns on if one of the three following conditions is matched: The first time powered on...
Page 29 4.3 Startup Control for Cooling Operation Table 3-4.1: Component control during startup in cooling mode Startup control Wiring Before Component startup STEP1 STEP2 STEP3 STEP4 STEP5 diagram label Initial step for 30S, adjust according to the high Inverter then+8Hz×Nodu / 10S. INV1 pressure and low pressure compressor...
Page 30 4.4 Startup Control for Heating Operation Table 3-4.2: Component control during startup in heating mode Startup control Wiring Before Component startup STEP1 STEP2 STEP3 STEP4 STEP5 diagram label Initial step for 30S, Adjust according to Inverter then+8Hz×Nodu / 10S. the high pressure INV1 compressor (Until it reaches (Pc-...
Page 31: Normal Operation Control
5 Normal Operation Control 5.1 Component Control during Normal Operation Table 3-5.1: Outdoor unit component control during normal operation Wiring Component Cooling Heating diagram label PI control, High pressure protection, Low pressure protection, Discharge temperature protection, Inverter Over-current protection control, Inverter module Inverter compressor COMP(A) temperature protection control, Wet compression...
Page 32: Heating Operation
5.2 Compressor Control Cooling operation Compressor frequency is PI controlled to keep low pressure at target temperature. Te: Low pressure equivalent saturation temperature (°C) Tes: Target Te value. Tes will be decided by Te setting, if you choose Auto that means except Te setting, the Tes would be adjusted according to the ambient temperature, refrigerant pipe length, etc.
Page 33: Heat Exchanger Control
5.3 Heat Exchanger Control The mode of the outdoor units is uniformly controlled by the master outdoor unit: the master outdoor unit check status of the outdoor unit heat exchanger and sends the calculation result to each slave unit, and each slave unit control their own four-way valve, fan and EEVA.
Page 34: Electronic Expansion Valve Control
5.4 Electronic Expansion Valve Control 5.4.1 EEVA control The positions of electronic expansion valves EEVA are controlled in steps from 0/0 (fully closed) to 480/2880 (fully open). 5.4.1.1 Outdoor unit heat exchanger is performed via the evaporator when outdoor temperature ≥- 8°C： This function is used to exert PI control on the electronic expansion valve EEVA so that the evaporator outlet superheated degree (SH) will become constant.
Page 35: Outdoor Fan Control
5.5 Outdoor Fan Control The speed of the outdoor unit fans is adjusted in steps, as shown in Table 3-5.9 Table 3-5.9: Outdoor fan speed steps Fan speed (rpm) Note 8-14HP 16-22HP cooling heating Fan speed index Stop operation, Startup Startup or defrosting FANA FANB...
Page 36 Table 3-5.10 Upper limit fan step in static pressure mode cooling Outdoor unit/HP Static Pressure mode 20Pa 40Pa 60Pa 80Pa Heating Outdoor unit/HP Static Pressure mode 20Pa 40Pa 60Pa 80Pa Note: Standard models can provide 35Pa maximum external static pressure. High static pressure models can provide 80Pa maximum external static pressure. If the external static pressure you needed over 35Pa, please contact us by suppliers for customized high static pressure models.
Page 37: Protection Control
6 Protection Control 6.1 High Pressure Protection Control This control protects the system from abnormally high pressure and protects the compressors from transient spikes in pressure. Figure 3-6.1: High pressure protection control Normal operation 4.15MPa < 3.5MPa ≥ High pressure protection, error code P12 is displayed Notes: : Discharge pressure 6.2 Low Pressure Protection Control...
Page 38 6.4 Over-current Protection Control Over current protection control is performed to prevent tripping due to transient inverter over-current. It protects the compressors from abnormally high currents. It is performed for each compressor. Figure 3-6.6: Over-current protection control Normal operation Current Current Current <...
Page 39 6.6 Inverter Module Temperature Protection Control This control protects the compressors from abnormally high currents and protects the inverter modules from abnormally high temperatures. It is performed for each compressor and inverter module. 6.6.1 Error code F62 Figure 3-6.9: Inverter module temperature protection control Normal operation Ntc <80°C When F62 protection occurs 3 times...
Page 40: Normal Operation
6.8 High Pressure Ratio Protection Control This high pressure ratio protection control is used to prevent the activation of protection devices due to abnormal increase of high pressure ratio, and to protect compressors against the transient increase of high pressure ratio. It is performed for entire system.
Page 41: Special Control
7 Special Control 7.1 Oil Return Operation In order to prevent compressors from running out of oil, the oil return operation is conducted to recover oil that has flowed out of the compressor(s) and into the piping system. This operation is performed for all units including units that are in standby.
Page 42 Cooling indoor unit 500P EEV Thermo ON unit Thermo OFF unit Keep the previous fan speed Stop or Fan Thermo ON unit Superheat control Electronic expansion valve (EEV) Thermo OFF unit 80pls Stop or Fan 80pls 7.1.2 Heating Oil Return Control It’s basically identical with defrosting operation, refer to 7.2 Defrosting Operation...
Page 43: Defrosting Operation
7.2 Defrosting Operation In order to recover heating capacity, the defrosting operation is conducted when the outdoor unit heat exchanger is performing as an evaporator. The defrosting operation is controlled according to outdoor ambient temperature, outdoor heat exchanger temperature, indoor heat exchanger temperature and outdoor units running time. When the outdoor unit is running in defrosting, the digital display on outdoor main PCB will display “df”.
Page 44: Other Control
8 Other Control 8.1 Overload control Overload control is used to maintain comfort requirement (i.e. outlet air temperature) and keep proper system pressure. Figure 3-8.1: Overload control Normal operation Indoor unit operation ratio <105% Indoor unit operation ratio 130% ≥ Overload control, indoor units operates in low fan speed Notes:...
Page 45 Cooling 14HP Heating Cooling 16HP Heating Cooling 18HP Heating Cooling 20HP Heating Cooling 22HP Heating Table 3-8.4: Low noise mode (continue) Silent mode 8 Silent mode 9 Silent mode 10 Silent mode 11 Silent mode 12 Silent mode 13 Silent mode 14 Max.
Page 46 8.5 Power Limitation Mode The energy saving mode is used to limit the system power. It can be used to limit the line selection current or to reduce the peak current. Table 3-8.5: Power limitation mode Correction factor Power limitation mode setting Power limitation mode level n23 40 n23 41...
Page 47: Field Settings
Part 4 Field Settings Overview ..................... 49 Digital display and button settings ............49 System Parameter Check ..............59...
Page 48 1. Overview This chapter describes how the system configuration can be implemented once the installation is completed , and other relevant information. It contains the following information: Implement field settings  Using the Check function  2. Digital display and button settings 2.1 Digital display output Table 4-2.1: Digital display output Outdoor unit state...
Page 49: Menu Mode
2.3 Menu mode Only master unit has the full menu functions, slave units only have error codes check and cleaning functions. 1. Long press SW5 "MENU" button for 5 seconds to enter menu mode, and the digital display displays "n0". 2.
Page 50 Menu mode function: Table 4-2.3 Menu mode function: First level menu Second level menu Specified menu mode Description Default Query History error (last ten error codes) (History error) Cleaning history error Query Indoor unit's address (Information (address) Query the address of Indoor unit in power-off condition query) Driver's version(compressor and fan displayed in turn) Accumulated running time of compressor...
Page 51 Table 4-2.3 Menu mode function(continue) First level menu Second level menu Specified menu mode Description Default Silent mode 8 Silent mode 9 Silent mode 10 Silent mode 11 (Silent mode) Silent mode 12 Silent mode 13 Silent mode 14 √ 0Pa static pressure 20Pa static pressure 40Pa static pressure(Customized)
Page 52 Table 4-2.3 Menu mode function(continue) √ Enable Internal ambient temperature sensor(T4) (Ambient Enable External ambient temperature sensor(T10-Optional) temperature) Reserved (Installation √ Reserved parameters) Reserved √ Reserved Set address of Outdoor unit Set Network address of Outdoor unit Set number of indoor units Auto addressing (indoor and outdoor units address) Clear address (indoor and outdoor units address, network address)
Page 53 Table 4-2.3 Menu mode function(continue) First level menu Second level menu Specified menu mode Description Default 41°C 42°C 43°C (evaporation (target 44°C condensation 45°C condensation temperature of the temperature) indoor unit) 46°C √ 48°C 51°C √ Low noise defrosting mode unavailable (Low noise Low noise defrosting mode available defrosting)
Page 54 2.4 Special mode introduction 2.4.1 Priority mode setting Priority mode can only be set on the master unit. When an indoor unit is in mode conflict with the outdoor units the unit displays the mode conflict error. The digital display on indoor main PCB will display error code E0. There are ten priority mode options: 1.
Page 55 5. Changeover mode: Before using this mode, you need to set the VIP indoor unit address. The default VIP address is 63, the VIP address also can be changed through menu mode“n1-6”. In changeover mode, if the VIP indoor unit is operating, the outdoor units will operate in the mode of the VIP indoor unit.
Page 56 Step1:preparation Step2:Calculate static pressure of Outdoor unit Step3:Indoor and outdoor Display error code temperatures are within the allowable U32/U33/U34 range of test run The number of Indoor units Turn on all indoor units is greater than 4 Start the Indoor unit with singular address Step4:The stop valve has been opened Display error code U35...
Page 57 3. System refrigerant quantity detection After entering this mode, the system will automatically run and finally output the diagnostic results of the system refrigerant quantity. Diagnostic results: Normal: Digital display “d34” Significantly excessive: Digital display “d32” Excessive: Digital display “d33” Insufficient: Digital display “d35”...
Page 58 3. System Parameter Check 3.1 UP / DOWN system check button Before pressing UP or DOWN button, allow the system to operate steadily for more than an hour. On pressing UP or DOWN button, the parameters listed in below table will be displayed in sequence. Table 4-3.1 system check list: DSP1 content Parameters displayed on DSP2...
Page 59: Oil Return
DSP1 content Parameters displayed on DSP2 Remarks 28.-- Primary current(A) Actual value = value displayed /10 29.-- Inverter compressor A current (A) Actual value = value displayed /10 30.-- Reserved 31.-- EXVA position Actual value = value displayed × 24 32.-- Reserved 33.--...
Page 60 DSP1 content Parameters displayed on DSP2 Remarks 【0】:No result 【1】:Significantly insufficient 【2】:insufficient 51.-- Refrigerant volume judgment 【3】:Normal 【4】:excessive 【5】:Significantly excessive Dirty blockage rate 52.-- 0~10, 10 represents the worst (outdoor heat exchanger) 53.-- Fan historical error 54.-- Software version 55.-- Last error or protection code 56.-- Reserved...
Page 61: Wiring Diagrams
Part 5 Electrical Components and Wiring Diagrams Outdoor Unit Electric Control Box Layout ..........63 Outdoor Unit Main Control Board ............64 Compressor & Fan drive board ............. 68 Wiring Diagrams .................. 74...
Page 62: Outdoor Unit Electric Control Box Layout
1. Outdoor Unit Electric Control Box Layout Figure 5-1.1: 8-22HP top layer of electric control box Main control board Communication terminals block Power supply terminals Figure 5-1.2: 8-22HP bottom layer of electric control box Filter board Inductor Reactor Compressor drive board PED board DC fan drive board...
Page 63: Outdoor Unit Main Control Board
Outdoor Unit Main Control Board 2.1 Outdoor unit main Control Board ports Figure 5-2.1: Outdoor unit main Control Board ports Notes: Label descriptions are given in Table 5-2.1: Main Control Board port...
Page 64 Table 5-2.1: Main Control Board port Label in Figure Port code Content Port voltage 5-2.1 CN82 Reserved 5Vdc CN36 Reserved 3.3Vdc CN70 EEVA drive port 12Vdc CN71 EEVB drive port(Reserved) 12Vdc CN72 EEVC drive port 12Vdc CN73 EXVE drive port 12Vdc Microchannel heat exchanger inlet temperature sensor(T6A)
Page 65 2.2 Outdoor unit main Control Board components 2.2.1 Layout Figure 5-2.2: Outdoor unit main Control Board components 2.2.2 Function of buttons SW3 to SW6 Table 5-2.2: Function of buttons SW3 to SW6 Button Function In menu mode: previous and next buttons for SW3 (UP) menu modes.
Page 66 2.2.3 Digital display output Table 5-2.4: Digital display output in different operating states Outdoor unit state Parameters displayed on DSP1 Parameters displayed on DSP2 The number of indoor units in DSP1 Standby The address of outdoor unit communication with the outdoor units For single Normal...
Page 67: Compressor & Fan Drive Board
Compressor & Fan drive board 3.1 Corresponding table of Compressor & Fan drive board and outdoor units Table 5-2.5: Corresponding table of Compressor & Fan drive board and outdoor units Compressor & Fan drive board model Model 8-14HP 16-18HP 20-22HP 3.2 Compressor &...
Page 68 3.3 Compressor & Fan drive board of 50A Figure 5-2.4: Compressor & Fan drive board of 50A 3.4 Compressor & Fan drive board of 75A Figure 5-2.5: Compressor & Fan drive board of 75A...
Page 69 3.5 Compressor & Fan drive board ports Figure 5-2.6: Compressor & Fan drive board ports of 50A Table 5-2.6: Compressor & Fan drive board port Label in Port Feature Content Port voltage Figure 5-2.5 code identifier Positive pole Input terminal of the high voltage capacitors P-in 438Vdc-650Vdc(Rated at 540Vdc) (connected to reactor)
Page 70 Table 5-2.6: Compressor & Fan drive board port Label in Port Feature Content Port voltage Figure 5-2.5 code identifier Power supply terminal for DC fan drive board (P,N) 438Vdc~650Vdc(Rated 540Vdc; CN38 (Reserved） P is positive, N is negative) CN26 Fan module controls power supply(Reserved） DCFAN Three phase output of the inverter ,connected to the DC fan 0~100%*input voltage(varying)
Page 71 3.6 The installation guide of Compressor & Fan drive board Figure 5-2.7: The installation guide of Compressor & Fan drive board...
Page 72 1. Before maintaining or repairing the outdoor unit, cut off the power supply of the outdoor unit for 5 minutes and use a mustimeter to ensure that the voltage is zero to avoid electric shock. Notice The unit has the low-power standby function. After entering this mode, only the power indicator of the main board is on.
Page 73: Wiring Diagrams
4. Wiring Diagrams Figure 5-3.1: EasyFit outdoor unit wiring diagram...
Page 74: Troubleshooting
Part 6 Diagnosis and Troubleshooting 1 Error Code Table ..................76 2 Error in Main Control................81 3 Error in Compressor Driver ..............158 4 Error in Fan Drive ................... 168 5 Appendix ....................177...
Page 75: Error Code Table
1 Error Code Table 1.1 Outdoor Error code table Table 6-1.1 Outdoor Error code table Manual re-start Error code Error description Remarks required Outdoor unit’s Emergency shutdown fault Outdoor unit’s No.x Inverter driver board does not match the main control board fault xA61 No.x slave unit error...
Page 76 Manual re-start Error code Error description Remarks required Gas pipe temperature sensor (Tg) error (open/short) sensor error Liquid pipe temperature sensor (T5) error (open/short) sensor error Outdoor Heat exchanger gas temperature sensor (T8) error (open/short) sensor error Outdoor heat exchanger liquid temperature sensor (TL) error (open/short) sensor error xFd1 Compressor suction temperature sensor (T71/T72) error (open/short)
Page 77 Manual re-start Error code Error description Remarks required EEPROM error E party error Overcurrent HyperLink overcurrent error protection Anti-condensation protection condensation Pd1 protection occurs 2 times in 60 minutes condensation missing 1b01 Electronic expansion valve (EEVA) error Connection missing 2b01 Electronic expansion valve (EEVB) error Connection missing...
Page 78 1.3 Compressor drive error code table Table 6-1.3 Compressor drive error code table Manual re-start Error code Error description Remarks required xL1E Hardware overcurrent current overload xL11 Software overcurrent error xL12 Software overcurrent protection last 30s Over-temperature xL2E Module overtemperature protection error xL3E Low bus voltage error...
Page 79 1.5 Status prompt code table Table 6-1.5 Status prompt code table Manual re-start Status code Code description Remarks required2 Oil return,”x” is the current step node Status hint Defrost, ”x” is the current step node Status hint The outdoor ambient temperature exceeds the upper limit Status hint (Heating mode) The outdoor ambient temperature exceeds the lower limit...
Page 80 2 Error in Main Control 2.1 A01: emergency shutdown of Outdoor Units Digital display output Description  Compressor protection shut down  All Outdoor Units stop running  Error codes are displayed only on master uint. Trigger / recover condition (1)Check menu N28 = 0: ...
Page 81 Menu option NC0=3或NC1=3? Menu option N28=0? CN55/CN56 short CN55/CN56 open circuit circuit Rule out short Rule out open circuit condition circuit condition Automatic recovery Error in the main after 5s? control board Replace the main- control board troubleshooting...
Page 82 2.2 xA61: No.x slave unit error Digital display output Description  xA6 shows The Outdoor Unit at address X is in error(x=1,2,3)  All Outdoor Units stop running  Error code are displayed only on master unit. Trigger / recover condition ...
Page 83 2.3 AAx: Inverter driver board X does not match the main control board Digital display output Description  No.x Inverter driver board does not match the main control board  All units stop running.  Error code is displayed on the unit with the error Trigger / recover condition ...
Page 84 2.4 xb53: No.x Recirculation fan error Digital display output Description  No.x Recirculation Fan[1] is in error  All units stop running.  Error code is displayed on the unit with the error Trigger / recover condition  Trigger condition: the difference between the actual fan speed and the set fan speed is 300rpm, lasting for 50s. ...
Page 85 Procedure xb53 Check whether the rewring wiring is correct[2] Two Recirculation The original faulty Fan system fan is normal Check whether the faulty fan works properly after the cables are exchanged with the normal fan Replace the power supply board Power on again, fan Replace the fan is normal...
Page 86 2.5 bA1: HyperLink cannot open or close IDU’s Electronic expansion valve Digital display output Description  When some IDUs are powered off, HyperLink fail to close their EEV.  All units stop running.  Error code is only displayed on the master unit Trigger / recover condition ...
Page 87 Procedure Replace the communication cable HyperLink Diameter of with the diameter specified in the communication line＜1.5mm2 installation manual Add a repeater at the The total length of HyperLink communication place 200 communication cables exceeds meters from the outside 200 meters without a repeater machine to the inside machine Connect the communication line of The number of powered off...
Page 88 2.6 U38: Outdoor Unit has no address. Digital display output Description  Outdoor Unit has no address.  The ODU with error can not run.  The master outdoor unit cannot communicate with indoor units. Trigger / recover condition  Trigger condition: The ODU’s address is not set ...
Page 89 2.7 C13: The address of Outdoor Unit is repeated Digital display output Description  The address of Outdoor Unit is repeated. Trigger /recover condition  Trigger:Two or more outdoor units in the Combined system have the same address  Recover condition:the address of master and slave unit are set to be 0~3 successively ...
Page 90 2.8 C21: Communication error between IDU and ODU. Digital display output Description  Communication error between IDU and ODU  All units stop running.  Error code is only displayed on the master unit. Trigger / recover condition  Trigger condition:20 minutes after the outdoor unit is power on,the communication signal from the IDU cannot be received by ODU for two minutes ...
Page 91 Procedure The IDUs and ODU use the same Power on again, and error Reconnect the communication lines communication port disappear Use the three-core shield cable (More than 0.75 Replace communication cable mm2 )[1] and the cable is intact Troubleshooting Use PQE communication port and enter N45-1 to choose At least one 2rd IDU exists in the system Non-SDV6 communication protocol RS-485 (P Q E) All the existing IDUs in the system are SDV6 series...
Page 92 2.9 C26 Abnormal reduction in the number of indoor units Digital display output Description  The number of online indoor units is smaller than the configured number  All units stop running. Error code is only displayed on the master unit ...
Page 93 Procedure Power on the IDUs again and check "Number of online units" after 6 minutes of standby[1] Check whether the number There are IDUs Check the power cord of the IDUs, and of online IDUs is consistent with not powered on in set the address for the IDU by the setting number the system...
Page 94 2.10 C28: Abnormal increase in the number of indoor units Digital display output Description  Abnormal increase in the number of indoor units  All units stop running.  Error code is only displayed on the master unit Trigger / recover condition ...
Page 95 Procedure Power on the ODU again and check "Number of Remove IDUs of other systems online units" after 6 minutes of standby[1] whether the number of online Check whether other The ODU mainboard is damaged. IDU is consistent with the actual IDUs are connected to Replace the mainboard number of connected IDU...
Page 96 2.11 xC31: Communication error between No.x slave outdoor unit and master outduoor unit. Digital display output Description  The No.x outdoor slave unit cannot communicate with the outdoor master unit.  All units stop running.  Error code is only displayed on the slave unit with the error. Trigger / recover condition ...
Page 97 Procedure Check whether the address Enter the menu N40 to reset of the ODU is correct[1] the outdoor unit address[1] Check whether the communication cable Reconnect the between ODUs are correct and secure communication lines Dismantle the H1/H2/E communication line Check whether the DC voltage between H1-E and H2-E of the master ODU is 2.5V...
Page 98 2.12 C32: Abnormal reduction in the number of outdoor units Digital display output Description  The number of online slave outdoor units detected by the master outdoor unit decreases  All units stop running.  Error code is only displayed on the master unit Trigger / recover condition ...
Page 99 Procedure Different series or Check whether the OSUs independent units can not be support parallel system mixed use, reinstall Make sure all outdoor units are Check whether the power connected to correct power supply of ODU is normal suppliess Check whether the address Enter the menu N40 to reset of the ODU is correct[1] the outdoor unit address[1]...
Page 100 2.13 C33: Abnormal increase in the number of outdoor units Digital display output Description  The number of online outdoor slave units detected by the outdoor master unit increases  All units stop running.  Error code is only displayed on the master unit Trigger / recover condition ...
Page 101 2.14 xC41: Communication Error between main control board and No.x inverter driver board Digital display output Description  The communication between the main control board and No.x inverter driver board is error  All units stop running.  Error code is displayed on the unit with the error Trigger / recover condition ...
Page 102 2.15 E41,F31,F41,F51,xF71,F81,F91,FA1,FC1,xFd1,Fp1: Temperature sensor error Digital display output Error code Error description Remarks Digital display output Outdoor ambient temperature sensor sensor error (T4) error(open/short) Microchannel heat exchanger outlet temperature sensor(T6B) sensor error error(open/short) Main heat exchanger pipe temperature sensor error sensor (T3) error(open/short) Microchannel heat exchanger inlet temperature sensor(T6A)
Page 103 Description  All units stop running.  Error code is displayed on the unit with the error Trigger / recover condition  Trigger condition:The main control board cannot obtain the normal AD value of the temperature sensor  Recover condition:The main control board obtain the normal AD value of the temperature sensor ...
Page 104 2.16 F62, F6A: Inverter driver board NTC overtemperature protection Digital display output Description  All units stop running  Error code is displayed on the unit with the error. Trigger/ Recover condition  Trigger condition: F62: The NTC temperature inside the compressor board or fan module is higher than 100 ° C F6A: F62 protection occurs 3 times in 100 minutes ...
Page 105 Procedure F62，F6A Power on again, Refastening Screws on the module screw[1] board are not secured troubleshooting？ Brush a layer of thermal grease Check whether the Power on again, evenly[2], and thermal grease layer is tighten the screws troubleshooting？ missing[2] again after installation[1] Inverter driver board is damaged...
Page 106 2.17 F63: Non-inductive resistance Tr overtemperature protection Digital display output Description  All units stop running  Error code is displayed on the outdoor unit with the Error Trigger/ Recover condition  Trigger condition: The non-inductive resistance temperature exceeds 95 ° C ...
Page 107 Procedure The Recirculation Fan in the electric control box works Top Flow Series improperly The air intake grille at the bottom of the machine or the internal air duct removal of fault refer to is blocked the procedure of xb53 Clean up Power on again, and error disappear...
Page 108 2.18 F72, F7A: Discharge Temperature protection Digital display output Description  Discharge Temperature is over the limit.  All outdoor Unit stop running  Error code is displayed on the unit with the error Trigger / Recover condition  Trigger condition: F72: Discharge Temperature (T7C1/T7C2) ≥...
Page 109 Procdure F72/F7A .Discharge temperature Reconnect the sensor sensors' connections on main to the Main control control board are loose[1] board Error disappear Troubleshooting The temperature sensor Replace the is abnormal[2] temperature sensor check whether there is a big The main control board difference between the measured is damaged.
Page 110 2.19 F75: Compressor discharge insufficient superheat protection Digital display output Description  Superheat degree of Compressor discharge temperature is too low, triggering protection shutdown  Determination during operation of outdoor unit.  All units stop running.  The error code is displayed on the outdoor unit with error. Trigger / recover condition ...
Page 111 Procedure The Discharge Ensure that the Discharge temperature temperature sensor is not sensor is properly connected and located at properly connected [1] the top of the compressor Discharge temperature Replace the sensor sensor failure [2] Replacing the high High pressure sensor failure[3] pressure Sensor Replace the When the system runs stably in...
Page 112 2.20 P11: High pressure sensor error Digital display output Description  Open/short circuit error of high pressure sensor  All units stop running.  The error code is displayed on the Outdoor Unit with error. Trigger / recover condition  Trigger condition:The main control board cannot obtain the normal AD value of the high pressure pressure sensor ...
Page 113 2.21 P12/P14:High pressure protection Digital display output Description  P12: The high pressure is over the limit.  P14: 3 times P12 in 100 minutes  All units stop running  Error code is displayed on the unit with the Error Trigger / recover condition ...
Page 114 Procedure The stop valves are close Open the stop valves 1. Connect pressure gauge to test Discharge pressure 2. Power on and run again, and check the low pressure value Check whether the pressure Discharge part of the refrigerant. Add sensor is normal[1] oil if it leaks during discharge Compare the pressure...
Page 115 2.22 P13: High pressure switch protection Digital display output Description  All units stop running  Error code is displayed on the unit with the Error Trigger / recover condition  Trigger condition: discharge pressure≥ 4.2MPa.  Recover condition:discharge pressure< 3.0 ...
Page 116 Procedure Ensure th e following 3 points: 1. Th e stop valve has been opened 2. Th e pressure switch is properly connected to the compressor module board 3. Th e pressure switch is in normal conduction state Th e 3 points above is normal Correct and reconfirm Operating system and measure the high pressure...
Page 117 2.23 P21: Low pressure sensor error Digital display output Description  Open/short circuit Error in suction pressure sensor  All units stop running.  Error code is only displayed on the slave unit with the error. Trigger / recover condition ...
Page 118 Procedure Check whether the sensor is Reconnect Sensor according properly and securely connected to the wiring diagram to the mainboard 1.Use pressure gauge to measure the low pressure 2. Use multimeter to measure the pressure sensor output voltage Whether the measured pressure value and output voltage Replace the conform to the characteristics of the...
Page 119 2.24 P22, P25: Low pressure protection Digital display output Description  All units stop running.  Error code is displayed on the unit with the error. Trigger/ Recover condition  Trigger condition:  P22: suction pressure < 0.07MPa.  P25: P22 occurs 3 times within 60 minutes ...
Page 120 Procedure P22/P25 Ensure th e following 2 points: 1. Th e stop valve has been opened 2. Th e Low pressure sensor is properly connected to the compressor module board Th e 2 points above is normal Correct and reconfirm Operating system and measure the low pressure by pressure gauge...
Page 121 2.25 P24: Abnormal elevation of low pressure Digital display output Description  All units stop running.  Error code is displayed on the unit with the error Trigger/ Recover condition  Trigger condition: Suction pressure >1.6MPa and lasts 60 minutes ...
Page 122: Reset Method
2.26 xP32, xP33: No.(x) compressor high DC bus current protection Digital display output Description  The DC bus current of No.x compressor is too high, triggering protection shutdown  All units stop running..  Error code is displayed on the unit with the error. Trigger / recover condition ...
Page 123 Procedure XP32，XP33 Open ODU stop ODU stop valve is closed? valve compressor cable is Replacing the damaged compressor Cable The resistance of The compressor is the compressor wiring damaged. Replace terminals to the ground is the compressor less than 1 MΩ Measure the resistance between the windings of the compressor...
Page 124 2.27 P51: High AC voltage protection Digital display output Description  The AC voltage of the system is too high, triggering the protection shutdown  All units stop running  Error code is displayed on the unit with the error. Trigger / recover condition ...
Page 125 2.28 P52: Low voltage protection Digital display output Description  The AC voltage of the system is too low, triggering the protection shutdown  All units stop running.  Error code is displayed on the unit with the error Trigger / recover condition ...
Page 126 VRF 50Hz Procedure Check the power input: 1. Whether the input voltage is within the allowed range (±10%) 2. Whether the input power supply is phase missing or wiring error 3. Whether the three-phase input voltage imbalance is less than 12V Whether the power Repairing the input input is abnormal...
Page 127 2.29 P53: Phase B and N of the power cable are connected to the opposite protection Digital display output Description  System zero line, phase line reverse connection  All units stop running  Error code is displayed on the unit with the error Trigger / recover condition ...
Page 128 Procedure Whether there is any abnormality in Replace inverter the input voltage of the power supply of the control board inverter drive board [1] Whether the line connection is normal Ensure proper (Whether the connection is missed or the wiring screw is not tight) Whether the power supply is normal?(BN is reversed or B phase...
Page 129 2.30 P54: DC bus low voltage protection Digital display output Description  The DC bus voltage of the compressor is too low  All units stop running.  Error code is displayed on the unit with the error Trigger / recover condition ...
Page 130 2.31 P55: Dc bus ripple over protection Digital display output Description  The ripple of the dc bus on the module is over the limits.  All units stop running.  Error code is displayed on the unit with the error Trigger / recover condition ...
Page 131 Procedure Standby check whether the three- Rectify the power phase input power supply of the inverter drive supply board is missing phase or wrong phase Main relay of Standby measure whether L1L2 relay output Replace the Inverter inverter drive board is missing phase drive board L1L2 is not closed...
Page 132 2.32 xP56: No.x inverter driver board DC bus voltage is too low Digital display output Description  No.x inverter driver board DC bus voltage is too low  All units stop running..  Error code is displayed on the unit with the error Trigger / recover condition ...
Page 133 2.33 xP57: No.x inverter driver board DC bus voltage is too high Digital display output Description  No.x inverter driver board DC bus voltage is too high  All units stop running..  Error code is displayed on the unit with the error Trigger / recover condition ...
Page 134 2.34 xP58: No.x inverter driver board DC bus voltage is seriously too high Digital display output Description  No.x inverter driver board DC bus voltage is seriously too high  All units stop running..  The error is displayed separately on each Outdoor Unit. Trigger / recover condition ...
Page 135 2.35 P71: Error in EEPROM Digital display output Description  The EEPROM parameter of the ODU main control board is incorrect  All units stop running.  Error code is displayed on the unit with the error Trigger / recover condition ...
Page 136 2.36 Pb1: HyperLink overcurrent error Digital display output Description  HyperLink overcurrent error  All units stop running.  Error code is displayed on master ODU. Trigger / recover condition  Trigger condition: No IDU is in power down mode and the feedback voltage of the HyperLink board is > 1.5V for 120ms. ...
Page 137 Procedure Remove the ODU M1M2 communication The ODU mainboard continues to restart, and the LED3 ODU mainboard is cable and measure whether there is a short circuit on the right side of HyperLink board lights up damaged, replace it between the two communication cables Measure whether there is a short circuit Replace the IDU Start from the IDUs which near the ODU to check...
Page 138 2.37 Pd1, Pd2: Anti-condensation protection Digital display output Description  Anti-condensation protection  All units stop running.  Error code is displayed on the unit with the error Trigger / recover condition  Trigger condition: Pd1:The outlet temperature of Microchannel heat exchanger is below the dew point temperature for more than 10 minutes Pd2:Pd1 protection occurs 2 times in 60 minutes ...
Page 139 Procedure Turn off the power supply, open the electrical control box to check the condensation of the radiator, and dry all water droplets on the radiator and inverter driver board. T5, T6A, and T6B sensors are Correct sensor installed in correct positions position The resistance of T5, T6A, Replace the sensor...
Page 140 2.38 xb01: The electronic expansion valve is in error Digital display output Description  No.x electronic expansion valve’s connection on main control board is missing(1 to 4 correspond to expansion valves A, B, C, and E respectively)  All units stop running Electronic ...
Page 141 Procedure xb01 No.x electronic expansion valve s connection on Ensure the connection is main control board is missing correct and firm. or loose[1] Electronic expansion valve main control coil has malfunction [2] board is damaged Replace the main Replace the electronic control board expansion valve Power on the ODU again,...
Page 142 2.39 U11: Outdoor unit model is not set Digital display output Description  All units stop running  Error code is displayed on the unit with the error Trigger / recover condition  Trigger condition: The model information is not set. ...
Page 143 2.40 U12: Outdoor unit Capacity setting error Digital display output Description  The capability information of outdoor unit is not set  All units stop running  Error code is displayed on the unit with the Error Trigger / recover condition ...
Page 144 2.41 U21: The indoor unit connection is incorrect Digital display output Description  The indoor unit connection is incorrect  All Outdoor units stop running  Error is only displayed in main control board Trigger / recover condition  Trigger condition: The following devices can be connected to the VRF system: Standard air-cooled indoor units •...
Page 145 2.42 U31: The test run was never successful Digital display output Description  The test run was unsuccessful  All units stop running  Error code is only displayed on the master unit. Trigger / Recover condition  Trigger condition: The test run was unsuccessful ...
Page 146: Error Code
2.43 U32, U33, U34: The temperature is not suitable for test run Digital display output Description  Ambient temperature is out the allowed range of test run  All units stop running  Error code is only displayed on Outdoor Unit Trigger /Recover condition ...
Page 147 Procedure U32\U33\U34 Check whether the ambient temperature is within the allowed range Termination of test run of test operation Power it on again and Rest runt in 30 minutes Troubleshooting...
Page 148: Trigger Condition
2.44 U35, U37: Stop valve is not open Digital display output Description  Stop valve is not open  All units stop running  Error code is only displayed on the master unit. Trigger/ Recover condition  Trigger condition: Error code Description The liquid side stop valve of the discharge pressure of...
Page 149 2.45 U3A: The communication cable is connected incorrectly Digital display output Description  There are indoor unit in the communication system outside the refrigerant system.  All units stop running  Error code only displayed on the master unit. Trigger / Recover condition ...
Page 150 2.46 U3b: The installation environment is abnormal Digital display output Description  During the test run, abnormal changes in ambient temperature are detected and the operation is stopped.  All units stop running  Error code only displayed on the master unit. Trigger / Recover condition ...
Page 151 Procedure Reinstall according to the Check whether the ventilation and heat dissipation are good and INSTALLATION AND meet installation requirements OWNER S MANUAL Remove other ODUs or Check whether return air heat sources, or transfer of the ODU is affected by other the machine to a well- heat sources or ODUs cooled environment for...
Page 152 2.47 U3C: Changeover mode error Digital display output Description  The ODU in changeover mode doesn’t detect the signal of VIP IDU.  ODUs stop running  Error code only displayed on the master unit. Trigger / Recover condition  Trigger condition: ①The ODU in changeover mode , but the VIP address has not been set.
Page 153 2.48 U4x: Overconnection ratio Digital display output Description  Protection Overconnection ratio  All units stop running Trigger / Recover condition  Trigger condition: Code of Indoor Unit and type analysis Code of Indoor Unit Indoor Unit Indoor Unit Indoor Unit Indoor Unit Type of Indoor Unit VRF Air-cooled indoor...
Page 154 Possible causes Indoor/Outdoor Unit connection rate out of allowable range Procedure Check the indoor unit connection and remove the indoor unit beyond the permitted range Power on and check again Troubleshooting...
Page 155 2.49 U51: Outdoor unit of Individual Series is installed in combine system Digital display output Description  Outdoor unit of Individual Series is installed in combine system  All units stop running  Error code is only displayed on master unit. Trigger / Recover condition ...
Page 156 2.50 U53: Detected different series outdoor units in the same VRF system Digital display output Description  Detected different series outdoor units in the same VRF system  All units stop running  Error code is only displayed master unit Trigger / Recover condition ...
Page 157 3 Error in Compressor Driver 3.1 xL1E: Hardware overcurrent Digital display output Description  The current exceeds the OCP protection value (peak value) set by the hardware or the IPM module receives an FO signal  The compressor stops running after the error occurs. If the error disappears one minute later, the compressor starts again Trigger / recover condition (1)Current reaches OCP protection value:...
Page 158 Procedure xL1E Replace the inverter driver Failure during standby board Compressor windings short-circuit Replace the compressor between phases Replace inverter diver board , Troubleshooting and the error code disappear abnormal sound or Check whether indoor unit Replace the indoor unit shaking in compressor electronic expansion valve can electronic expansion valve...
Page 159 3.2 xL11, xL12 : Software overcurrent Digital display output Description  The current exceeds the OCP protection value set by the software.  The compressor will shutdowm when the error occurs. If the error disappears one minute later, the compressor will start again.
Page 160 3.3 xL2E: Module overtemperature protection Digital display output Description  The temperature of the IPM exceeds 105° C.  The compressor will stop when the error occurs. If the error disappears one minute later, the compressor will start again Trigger / recover condition ...
Page 161 3.4 xL3E: The bus voltage is too low Digital display output Description  Bus voltage is lower than the low bus voltage protection threshold set by the software (350VDC).  The compressor stops running after the error occurs. If the error disappears one minute later, the compressor starts again.
Page 162 3.5 xL31: The bus voltage is too high Digital display output Description  Bus voltage is higher than the high bus voltage protection threshold set by the software (800VDC).  The compressor stops running after the error occurs. If the error disappears one minute later, the compressor starts again.
Page 163 3.6 xL32: The bus voltage is excessively high Digital display output Description  Bus voltage is higher than the high bus voltage protection threshold set by the software (820VDC).  The compressor stops running after the error occurs. If the error disappears one minute later, the compressor starts again.
Page 164 3.7 xL43: The current sampling bias is abnormal. Digital display output Description  Bias calibration of the current sampling circuit is in error.ias calibration of the current sampling circuit is in error.  After this error occurs, the compressor cannot start. Check whether the inverter driver board is in error. Trigger / recover condition ...
Page 165 3.8 xL5E: Startup failed Digital display output Description  The compressor fails to start  The compressor stops running after the error occurs. If the error disappears one minute later, the compressor starts again. Trigger / recover condition  Trigger condition:The compressor fails to start ...
Page 166 3.9 xL52: Locked-rotor protection Digital display output Description  The compressor is blocked.  The compressor stops running after the error occurs. If the error disappears one minute later, the compressor starts again. Trigger / recover condition  Trigger condition:The compressor is blocked. ...
Page 167 4 Error in Fan Drive 4.1 xJ1E: Hardware overcurrent Digital display output Description  The current exceeds the OCP protection value (peak value) set by the hardware or the IPM module receives an FO signal  The fan stops running after the error occurs. If the error disappears five seconds, the fan starts again Trigger / recover condition (1)Current reaches OCP protection value: ...
Page 168 4.2 xJ11, xJ12: Software overcurrent Digital display output Description  The current exceeds the OCP protection value set by the software.  The fan will stop when the error occurs. If the error disappears five seconds later, the fan will start again. Trigger / recover condition ...
Page 169 4.3 xJ2E: Module overtemperature protection Digital display output Description  The temperature of the IPM exceeds 105°.  The fan stops running after the error. If the error disappears after five seconds, the fan starts again. Trigger / recover condition ...
Page 170 4.4 xJ3E: The bus voltage is too low Digital display output Description  Bus voltage is lower than the low bus voltage protection threshold set by the software (350VDC).  The fan stops running after the error occurs. If the error disappears five seconds later, the fan starts again. Trigger / recover condition ...
Page 171 4.5 xJ31: The bus voltage is too high Digital display output Description  Bus voltage is higher than the high bus voltage protection threshold set by the software (800VDC).  The fan stops running after the error occurs. If the error disappears five seconds later, the fan starts again. Trigger / recover condition ...
Page 172 4.6 xJ32: The bus voltage is excessively high Digital display output Description  Bus voltage is higher than the high bus voltage protection threshold set by the software (820VDC).  The fan stops running after the error occurs. If the error disappears five seconds later, the fan starts again. Trigger / recover condition ...
Page 173 4.8 xJ5E: Startup failed Digital display output Description  The fan fails to be started.  The fan stops running after the error. If the error disappears after five seconds, the fan starts again. Trigger / recover condition  Trigger condition: Fan startup failure. ...
Page 174 4.9 xJ52: Locked-rotor protection Digital display output Description  The fan is blocked.  The fan stops running after the error. If the error disappears after five seconds, the fan starts again. Trigger / recover condition  Trigger condition: The fan is blocked. ...
Page 175 4.10 xJ6E: Motor lack of phase protection Digital display output Description  The fan has phase loss protection.  The fan stops running after the error. If the error disappears after five seconds, the fan starts again. Trigger / recover condition ...
Page 176 5 Appendix 5.1 Resistance characteristics of temperature sensor Table 6-5.1: Temperature probe symbol and position Temperature probe symbol and position The probe type Bottom of heat exchanger Type A Outdoor ambient temperature Type A Liquid pipe stop valve Type A Microchannel heat exchanger inlet pipe Type A Microchannel heat exchanger outlet pipe...
Page 177 (continues) Table 6-5.2: Temperature sensor temperature resistance characteristic table temperature resistance (kΩ) (°C) Type A Type B Type C 33.33 171.9 169.9 31.56 163.3 161.5 29.91 155.2 153.6 28.35 147.6 146.1 26.88 140.4 139.1 25.5 133.5 132.3 24.19 127.1 22.57 21.81 115.2 114.3...
Page 178 (continues) Table 6-5.2: Temperature sensor temperature resistance characteristic table temperature resistance (kΩ) (°C) Type A Type B Type C 4.387 24.85 24.85 4.213 23.89 23.9 4.046 22.89 22.98 3.887 22.1 22.1 3.735 21.26 21.26 3.59 20.46 20.47 3.451 19.69 19.7 3.318 18.96 18.97...
Page 179 (continues) Table 6-5.2: Temperature sensor temperature resistance characteristic table temperature resistance (kΩ) (°C) Type A Type B Type C 0.9366 5.488 5.492 0.9075 5.32 5.322 0.8795 5.157 5.159 0.8525 0.8264 4.849 4.855 0.8013 4.703 4.705 0.7771 4.562 4.566 0.7537 4.426 4.431 0.7312 4.294...
Page 180 (continues) Table 6-5.2: Temperature sensor temperature resistance characteristic table temperature resistance (kΩ) (°C) Type A Type B Type C 0.2777 1.632 0.2708 0.2641 0.2576 0.2513 0.2451...
Page 181 5.2 Normal status parameter of refrigerant system The parameters listed in Tables 5.2.1 and 5.2.2 need to be noted when the following conditions are met::  The master can detect all indoor machines:  The number of indoor units displayed for outdoor units is consistent with the actual installation. ...
Page 182 5.3 Analysis of the cause of system anomalies Cause Analysis of Excessive discharge Temperature Check whether coil is not failure of SV7 coil properly installed failure of SV7 body Control failure of Control failure of mainboard Check whether coil failure of EEVC coil is normal failure of EEVC failure of SV7 body...
Page 183 Cause Analysis of too high Pressure Stop valve is closed Check the stop valve The resistance of the Piping is bent or severely Check the pipe high-pressure side pipe deformed is too large Check whether there is a large temperature difference The pipe is blocked.
Page 184 Cause Analysis of too Low Pressure Whether there is a big difference Failure of low Control failure of between the actual low pressure pressure sensor The compressor and the spot low pressure *cooling mode Mainboard is Check whether the power supply of capacity damaged the mainboard is abnormal...
Page 185 5.4 Outdoor unit main Control Board ports table Figure 6-5.1: Outdoor unit main Control Board ports...
Page 186 Table 6-5.5: Main Control Board port definition Table Label in Figure Port code Content Port voltage 5-2.1 CN82 Reserved 5Vdc CN36 Reserved 3.3Vdc CN70 EEVA drive port 12Vdc CN71 EEVB drive port(Reserved) 12Vdc CN72 EEVC drive port 12Vdc CN73 EXVE drive port 12Vdc Microchannel heat exchanger inlet temperature sensor(T6A)
Page 187 5.5 Compressor & Fan drive board ports detection Port reference and function definition of Compressor & Fan drive board Figure 6-5.2: Compressor & Fan drive board ports Table 6-5.5: Port definition and functions table Label in Port Feature Content Port voltage Figure 6-2.5 code identifier...
Page 188 Table 6-5.5: Port definition and functions table (continues) Label in Port Feature Content Port voltage Figure 6-2.5 code identifier Power supply terminal for DC fan drive board (P,N) 438Vdc~650Vdc(Rated 540Vdc; CN38 (Reserved） P is positive, N is negative) Fan module controls power supply(Reserved） CN26 DCFAN Three phase output of the inverter ,connected to the DC fan...
Page 189 Fan drive board Figure 6-5.3: Fan drive board Table 6-5.6: Compressor & Fan drive board port Label in Port code Content Port voltage Figure 5-2.5 Fan module controls power supply(Reserved） EEPROM Program burning port Communication port between main control board and CN4\CN1 Fan drive board Power supply terminal for DC fan drive board (P,N)
Page 190 Inverter drive board measurement guidelines Please give priority to the following things before testing Inverter drive board: Cut off the power supply: To avoid electric shock from capacitor discharge, power off for 10 minutes and wait for capacitor discharge before operation: Remove all wiring on the Inverter drive board.
Page 191 Schematic diagram of measuring points of Inverter drive board:...
Page 192 5.6 Appendix of Pressure Sensor Detection Pressure sensor characteristics 5.00 High Pressure sensor P Low Pressure sensor P 4.50 y = 2x + 0.5 y = 0.87x + 0.5 4.00 3.50 3.00 2.50 2.00 1.50 1.00 0.50 0.00 Pressure（MPa) :Vout(H)=0.87×P +0.5 :Vout(L)=2×P +0.5...
Page 193 5.7 Refrigerant volume diagnosis When running the refrigerant quantity detection program, the machine calculates the system refrigerant quantity according to the ambient temperature, condensing temperature and evaporation temperature, heat exchanger inlet and outlet temperature and other parameters, and give hints according to the results The detection results of the system have SDV5 IDUs may have a large deviation.
Page 194 Procedure Start Confirm whether the following two points meet the requirements: 1. Whether all IDUs in the system are SDV6 series? 2. Does the system choose SDV6 communication protocol or HyperLink? Whether the above two The detection results of the system have points are consistent SDV5 IDUs may have a large deviation Enter the refrigerant...
Page 195 5.8 Oil volume table Table 6-5.6: EasyFit Oil volume table Compressor A additional adding oil Oil model TOTAL OIL TOTAL OIL (Y1) Volume FV68H 1.1L 4L+1.1L 5.1L 10HP FV68H 1.1L 4L+1.1L 5.1L 12HP FV68H 1.1L 4L+1.1L 5.1L 14HP FV68H 1.1L 4L+1.1L 5.1L 16HP...
Page 196: Emergency Number
United Kingdom www.sinclair-world.com This product was manufactured in China (Made in China). R E P R E S E N T A T I V E SINCLAIR Global Group s.r.o. Purkynova 45 612 00 Brno Czech Republic T E C H N I C A L S U P P O R T SINCLAIR Global Group s.r.o.

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