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Sinclair SDV 6 Service Manual

Full dc inverter systems
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FULL DC INVERTER SYSTEMS
SERVICE MANUAL
INDOOR UNITS SDV6
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

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Summary of Contents for Sinclair SDV 6

  • Page 1 FULL DC INVERTER SYSTEMS SERVICE MANUAL INDOOR UNITS SDV6 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 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 Indoor and outdoor unit compatibility ............ 2 R32 System Service ................... 3 Main PCB Ports ..................7 Indoor unit settings ................30 Display Panels ..................39 Control ....................41 Errors and operation code ..............53 Troubleshooting ..................55 Appendix ....................128...
  • Page 5 1 Indoor and outdoor unit compatibility Before performing maintenance, please confirm that the indoor and outdoor units in the system are compatible with each other. For specific compatibility relationships, please refer to the table below. Indoor Unit SDV5 platform SDV6 platform Indoor Unit SDV6 indoor SDV6 unit...
  • Page 6 2 R32 System Service Indoor units in this manual can be used with both R410A and R32 refrigerant systems. When repairing systems that use R32 refrigerant, the following warnings and operating requirements should be noted. 2.1 Warning about the R32 refrigerant The following information indicates a hazard with a medium level of risk which, if not avoided, could result in death or serious injury.
  • Page 7 The following checks shall be applied to installations using flammable refrigerants: – the charge size is in accordance with the room size within which the refrigerant containing parts are installed; – the ventilation machinery and outlets are operating adequately and are not obstructed; –...
  • Page 8 Since flammability is a consideration. The following procedure shall be adhered to: • remove refrigerant; • purge the circuit with inert gas; • evacuate; • purge again with inert gas; • open the circuit by cutting or brazing. The refrigerant charge shall be recovered into the correct recovery cylinders. The system shall be “flushed” with OFN to render the unit safe.
  • Page 9 When transferring refrigerant into cylinders, ensure that only appropriate refrigerant recovery cylinders are employed. Ensure that the correct number of cylinders for holding the total system charge are available. All cylinders to be used are designated for the recovered refrigerant and labelled for that refrigerant (i.e. special cylinders for the recovery of refrigerant).
  • Page 10 3 Main PCB Ports 3.1 Compact Four-way Cassette Figure 3.1:Compact Four-way Cassette main PCB port 12 13 14 15 Table 3.1: Compact Four-way Cassette main PCB ports Label in Code Content Port voltage Note Figure 3.1 CN1(L,N) AC power input 220V AC Standard CN22...
  • Page 11 Notes: Standard: The port is standard, the customers can connect corresponding device through this port, such as water pump and Humidity sensor etc. Customized: The port is not available on the mainboard. If necessary, you need to customize the port Reserved: This port can not be used.
  • Page 12 Table 3.2: voltage test instructions (continue) Code Content Description Description When the water pump is running, pin 2 and 3 CN190 Drainage pump port output 12V DC 1 pin Display panel Using the DC voltage gear of the multimeter CN30 connection to test pin 1 and 4, the value should be 12V;...
  • Page 13 3.2 Four-way Cassette Figure 3.2: Four-way Cassette main PCB ports 12 13 14 15 Table 3.3: Four-way Cassette main PCB ports Label in Code Content Port voltage Note Figure 3.2 CN1(L,N) AC power input 220V AC Standard CN22 AC power output used for customization function: 220V AC Standard (ALARM,N,AC2)
  • Page 14 Notes: Standard: The port is standard, the customers can connect corresponding device through this port, such as water pump and Humidity sensor etc. Customized: The port is not available on the mainboard. If necessary, you need to customize the port Reserved: This port can not be used.
  • Page 15 3.3 Duct Low static pressure Figure 3.3: Duct main PCB ports Table 3.4: Duct main PCB ports Label in Code Content Port voltage Note Figure 3.3 CN1(L.N) AC power input 220V AC Standard CN22 AC power output Used for customization function: 220V AC Standard (ALARM,N,AC2)
  • Page 16 Table 3.4: Duct main PCB ports (continued) Label in Code Content Port voltage Note Figure 3.3 CN81 T2 Temperature sensor connection 3.3V DC Standard CN82 T1 Ambient Temperature sensor connection 3.3V DC Standard CN83 T2B Temperature sensor connection 3.3V DC Standard CN-A Sterilization module port...
  • Page 17 3.4 Medium Static Pressure Duct Figure 3.4: Medium Static Pressure Duct main PCB ports Table 3.5: Medium Static Pressure Duct main PCB ports Label in Code Content Port voltage Note Figure 3.4 CN1(L.N) AC power input 220V AC Standard CN22 AC power output Used for customization function: 220V AC Standard...
  • Page 18 Table 3.5: Medium Static Pressure Duct main PCB ports (continued) Label in Code Content Port voltage Note Figure 3.4 CN81 T2 Temperature sensor connection 3.3V DC Standard CN82 T1 Ambient Temperature sensor connection 3.3V DC Standard CN83 T2B Temperature sensor connection 3.3V DC Standard CN-A...
  • Page 19 3.5 Wall Mounted Figure 3.5: Wall Mounted main PCB ports 12 13 14 15 Table 3.6: Wall Mounted main PCB ports Label in Code Content Port voltage Note Figure 3.5 CN1(L,N) AC power input 220V AC Standard CN22 AC power output used for customization function: 220V AC Standard (ALARM,N,AC2)
  • Page 20 Notes: Standard: The port is standard, the customers can connect corresponding device through this port, such as water pump and Humidity sensor etc. Customized: The port is not available on the mainboard. If necessary, you need to customize the port Reserved: This port can not be used.
  • Page 21 3.6 One-way Cassette Figure 3.6: One-way cassette main PCB ports 12 13 14 15 Table 3.7: One-way cassette main PCB ports Label in Code Content Port voltage Note Figure 3.6 CN1(L,N) AC power input 220V AC Standard CN22 AC power output used for customization function: 220V AC Standard (ALARM,N,AC2)
  • Page 22 Notes: Standard: The port is standard, the customers can connect corresponding device through this port, such as water pump and Humidity sensor etc. Customized: The port is not available on the mainboard. If necessary, you need to customize the port Reserved: This port can not be used.
  • Page 23 3.7 Two-way Cassette Figure 3.7: Two-way cassette main PCB ports Table 3.8: Two-way cassette main PCB ports Label in Code Content Port voltage Note Figure 3.7 CN1(L.N) AC power input 220V AC Standard CN22 AC power output Used for customization function: 220V AC Standard (ALARM,N,AC2)
  • Page 24 Table 3.8: Two-way cassette main PCB ports (continued) Label in Code Content Port voltage Note Figure 3.7 CN81 T2 Temperature sensor connection 3.3V DC Standard CN82 T1 Ambient Temperature sensor connection 3.3V DC Standard CN83 T2B Temperature sensor connection 3.3V DC Standard CN-A Sterilization module port...
  • Page 25 3.8 Floor Standing Figure 3.8: Floor Standing main PCB ports 12 13 14 15 Table 3.9: Floor Standing main PCB ports Label in Code Content Port voltage Note Figure 3.8 CN1(L,N) AC power input 220V AC Standard CN22 AC power output used for customization function: 220V AC Standard (ALARM,N,AC2)
  • Page 26 Notes: Standard: The port is standard, the customers can connect corresponding device through this port, such as water pump and Humidity sensor etc. Customized: The port is not available on the mainboard. If necessary, you need to customize the port Reserved: This port can not be used.
  • Page 27 3.9 High Static Pressure Duct (5.6-16kW) Figure 3.9: High Static Pressure Duct main PCB ports (5.6-16kW) Table 3.10: High Static Pressure Duct main PCB ports (5.6-16kW) Label in Code Content Port voltage Note Figure 3.9 CN1(L.N) AC power input 220V AC Standard CN22 AC power output Used for customization function:...
  • Page 28 Table 3.10: High Static Pressure Duct main PCB ports (continued) Label in Code Content Port voltage Note Figure 3.9 CN81 T2 Temperature sensor connection 3.3V DC Standard CN82 T1 Ambient Temperature sensor connection 3.3V DC Standard CN83 T2B Temperature sensor connection 3.3V DC Standard Water level port...
  • Page 29 3.10 High Static Pressure Duct (20-56kW) Figure 3.10: High Static Pressure Duct main PCB ports (20-56kW) Table 3.11: High Static Pressure Duct main PCB ports (20-56kW) Label in Code Content Port voltage Note Figure 3.10 CN1(L.N) AC power input 220V AC Standard CN22 AC power output Used for customization function:...
  • Page 30 Table 3.11: High Static Pressure Duct main PCB ports (continued) Label in Code Content Port voltage Note Figure 3.10 CN30 Display Panel connection 12V DC Standard CN35 Humidity sensor connection 3.3V DC Standard Water level port 3.3V DC Standard CN190 Drainage pump port 12V DC Standard...
  • Page 31 Figure 3.11: Fan module ports (20-56kW) Table 3.12: High Static Pressure Duct main PCB ports (continued) Label in Code Content Port voltage Note Figure 3.10 CN1(N) Power input 220V AC Standard CN2(L) Power input 220V AC Standard CN21 Reserved 220V AC Reserved CN22 Reserved...
  • Page 32 Table 3.13: voltage test instructions Label Code Content Picture Main control board connection CN25 Program burning port(fan module)
  • Page 33 4 Indoor unit settings 4.1 Parameter settings Taking SWC-61 as an example, the parameters can be set in the power-on or power-off state. ①Hold " " and " " for 3 seconds to enter the parameter setting interface, and the main interface will display "CC" ②...
  • Page 34 Table 4.1: Wired controller Parameter Settings(continues) Parameter Parameter Default Parameter Name Remarks Code Range Value LED indicator of wired 00: Off When it is on, LED indicator shows the on/off state of the controller 01: On indoor unit. When it is off, LED indicator is off. Wired controller Follow Celsius: Me temperature...
  • Page 35 Table 4.2: Indoor unit Parameter Settings Parameter Parameter Default Parameter Name Remarks Code Range Value IDU static pressure level: The IDU sets the selected corresponding static pressure Static pressure of IDU 00/01/02/03/ (FF-there may be different default values for different series 04/05/06/07/08/ of indoor units) 09/~/19/FF...
  • Page 36 Table 4.2: Indoor unit Parameter Settings(continues) Parameter Parameter Default Parameter Name Remarks Code Range Value 00: Start/Stop delay 01: Speed 1 02: Speed 2 03: Speed 3 Fan speed setting in 00/01/02/03/04/ 04: Speed 4 Cooling standby mode 05/06/07/14 05: Speed 5 06: Speed 6 07: Speed 7 14: Fan speed before going to standby mode...
  • Page 37 Table 4.2: Indoor unit Parameter Settings(continues) Parameter Parameter Default Parameter Name Remarks Code Range Value 00: 0°C IDU cooling mode 01: 1°C temperature 00/01/02/03/04 02: 2°C compensation 03: 3°C 04: -1°C 00: 03°C Maximum indoor 01: 04°C temperature drop in dry 00/01/02/03/04 02: 05°C mode...
  • Page 38 Table 4.2: Indoor unit Parameter Settings(continues) Parameter Parameter Default Parameter Name Remarks Code Range Value Long-distance alarm 00: Alarm when closed 00/01 function setting 01: Alarm when open 00: Off Turbo 00/01 01: On (Rapid cooling/Rapid heating) 00: No sterilization function (default) Sterilization function 00/01 01: Plasma disinfection...
  • Page 39 Table 4.2: Indoor unit Parameter Settings(continues) Parameter Parameter Default Parameter Name Remarks Code Range Value 00: 15 min 01: 30 min Stop delay when 00/01/02/03/04/ 02: 45 min unattended 03: 60 min 04: 90 min 05: 120 min ETA function 00: Off 00/01 setting...
  • Page 40 4.2 Indoor unit parameter query Taking SWC-61 as an example " ①Hold " " and " " for 2 seconds to enter the query interface, u00-u03" indicates ODUs, "n00-n63" indicates IDUs (the last two digits are the ODU or IDU addresses), and "CC" indicates the wired Check No.
  • Page 41 4.3 Function Descriptions 4.3.1 Power failure memory function The power failure memory function can be used to ensure that, in the event of a power outage, the indoor units, which was in operation before, automatically restart once the power returns. When the power returns following a power outage, units with Power failure memory function enabled restart with the same operating mode, fan speed and remote control lock status settings as before the power outage.
  • Page 42 5 Display Panels 5.1 Appearance of Display Panel The appearance of the digital display panel used is shown in Figure 5.1. Figure 5.1: Digital display panel Display panel for Compact Four-way Cassette and Display panel for Duct\Medium Static Pressure Duct\ Four-way Cassette High Static Pressure Duct (New 360 degree panel, standard panel)
  • Page 43 5.2 Output under Normal Operating Conditions Unit state Digital display Standby Cooling and heating : set temperature Normal operation dehumidify mode: set temperature Operating Fan only mode: indoor ambient temperature Special operation Mode code Error Error code Notes: The special operation modes refer to Table 7.2:Operating Status Codes The error code refer to Table 7.1:Error code...
  • Page 44 6 Control 6.1 Temperature Compensation Control Because of the installation position of Indoor Unit and different layout, indoor temperature detected by Indoor Unit may not consist with actual temperature. Indoor temperature could be compensated by controller (The parameter code is”N25” “N26”) 6.2 EEV Control When the IDU is powered on again or the ODU is stopped, the system automatically enters initialization mode.
  • Page 45 6.3 Start and Stop Control Indoor Unit judges the operation state according to the temperature compensation value (ΔTC) and the difference value between detected indoor temperature (T1) and set temperature (TS). When the indoor temperature reaches the set one, Indoor Unit shut down; when the indoor temperature exceeds the set one, Indoor Unit start running.
  • Page 46 6.4 Fan Control 6.4.1 Fan speeds control The IDU can work in seven-speeds or three-speeds.  Seven-speeds When the Indoor Unit detects seven wind speeds the wind speed is set as follows. Sleep Speed 1 Speed 2 Speed 3 Speed 4 Speed 5 Speed 6 Speed 7...
  • Page 47  Determine the initial fan speed of auto fan control The initial fan speed is determined according to the difference between ambient indoor temperature (T1) and set temperature (TS), and it updates in the following situations: 1) The first time enter this mode 2) TS is changed 3) When switching between normal operation and silent operation 6.4.3 Anti-cold Air Control...
  • Page 48 6.5 Swing control 6.5.1 Horizontal swing control  Angle range of horizontal swing Table 6.1: Angle range of horizontal swing heating cooling adjustable range A1+A2 A1+A2 shutdown angle A1+B/A2+C A1+B/A2+C Figure 6.1 Horizontal swing angle Note: Wall mounted(G) have Horizontal swing control Table 6.2: Angle range of Horizontal swing Heating Cooling/Dehumidification...
  • Page 49 6.5.2 Vertical swing control Figure 6.2 Vertical swing control Different IDU series have different adjustable swing angle and default swing angle under different functions. And each operation mode has its default adjustable range of swing angle. P1-P5 values vary because of the different operation modes and IDU series.
  • Page 50 6.5.3 Individual louver control Four-way Cassette and Compact Four-way Cassette have the individual louver control and the detail according to the following: a) Louver selection: After entering the louver selection operation, all air flap immediately stop at the current spot and record the current spot. If there is no parameter setting within 3s, exit the louver selection state and all air flap return to the previous spot.
  • Page 51 6.6 Operation mode control  Outdoor Unit is Heat Pump ①When the mode is set by ODU to VIP priority, Voting priority, Capability requirements priority, Cooling priority, heating priority, the Indoor Unit can be set to cooling, heating, dehumidification, ventilation modes. When the IDU set mode different from the mode of ODU, the indoor unit will enters the standby mode, and the "No permission"...
  • Page 52 6.7 Human Detect control The Human detect sensor is optional. The operation mode of human detect control can be set by controller (N50). 1） When set the mode "Used to adjust the set temperature when unattended" and enter the unattended state , the following logic is executed ①...
  • Page 53 6.8 Controlling the Condensate Water Pump and Water Level Switch When the IDU is powered on the first time, the water pump is forced to operate for 5 minutes. When the IDU and ODU are in cooling, dehumidification and self-cleaning mode, the water pump starts immediately and operates continuously.
  • Page 54 6.11 High ceiling setting For embedded IDU series, such as Compact Four-way Cassette and Four-way Cassette, when the installation exceeds the specified height (default 3 meters), can enter the High ceiling setting ( The parameter code is”N31” ) to change . 3 meters high height, 4 meters high height or 4.5 meters high height can be set.
  • Page 55 6.13 Dry mode control There is a difference between the control with humidity sensor and the control without humidity sensor, when the humidity sensor is damaged, the indoor unit automatically switches to the state without humidity sensor.  Without humidity sensor Related settings: ①The temperature of dry mode;②Maximum indoor temperature drop in dry mode (N27);③Standby fan speed in dry mode(N19) Enter Standby: When Ts-T1>ΔT, the IDU will Enter Dry standby mode.
  • Page 56 7 Errors and operation code 7.1 Error Code Table Table 7.1: Error code Error Error Content Content code code Emergency stop Abnormal communication between the IDU and Wi-Fi Kit Abnormal communication between the IDU main control R32 refrigerant leaks, requiring shutdown immediately board and display board Abnormal communication between the AHU Kit slave unit Outdoor unit fault...
  • Page 57 Table 7.1: Error code(continues) Error Error Content Content code code The built-in room temperature sensor of the wired Locked (electronic lock) controller short-circuits or cuts off The wireless temperature sensor short-circuits or cuts Unit model code not set The external room temperature sensor short-circuits Capacity(HP) code not set or cuts off Tcp (pre-cooled fresh air temperature sensor)
  • Page 58 8 Troubleshooting Warning  All electrical work must carried by competent and suitably qualified, certified accredited professionals and in accordance with all applicable legislation (all national, local and other laws, standards, codes, rules, regulations and other legislation that apply in a given situation). ...
  • Page 59 8.1.1 A01 – Emergency shutdown Digital display Display position Error display Panel, display box, and wired controller The faulty IDU and other IDUs of the same system: stop running, displaying code "A01" (SDV5 plat. indoor unit displays "A0" code) Error impact ODU of the same system: stop running, displaying code "A01"...
  • Page 60 8.1.2 A11 - R32 refrigerant leaks, requiring shutdown immediately Digital display Display position Error display Panel, display box, and wired controller  Faulty IDU: The fan operates at the highest speed, the EEV is closed (Note: Fault persists after power on again), and buzzer of the display control board of the faulty IDU and buzzer of wired controller connected to the faulty IDU keep beeping.
  • Page 61 Note 1: Step 1: Check whether pipes are leaking refrigerant. Method: If the system is connected with the refrigerant cutoff device, use the refrigerant pressure gauge to connect the check valve of refrigerant cut-off device liquid or gas pipe; If the system is not connected with a refrigerant cut-off device, use the refrigerant pressure gauge to connect the check valve of refrigerant cut-off device liquid or gas pipe.
  • Page 62 Figure 1 Schematic diagram of the R32 refrigerant leakage detection system 1-1: Common terminal 2-2: Sending R32 refrigerant leakage signal Connecting an 3-3: Sending sensor module fault signal alarm or a fan 1-1/2-2/3-3 AC220V three-core communication cable output (configured on site) S1 button Buzzer Adapter board...
  • Page 63 8.1.3 A51 - ODU fault Digital display Display position Error display Panel, display box, and wired controller The faulty IDU and other IDUs of the same system: The fan continues running, the EEV is closed, and code "A51" is displayed (SDV5 platform IDU displays the code "Ed") ODU of the same system: Error impact ...
  • Page 65 8.1.4 A71 - The error of the linked FAPU is transmitted to the master IDU (series setting) Note: 1) The type of FAPU may be HRV, VRF fresh air IDU and so on. 2) Series setting: The air supply side of the linked FAPU is directly connected to the air return side of the master IDU thro ugh an air duct.
  • Page 66 8.1.5 A72 - The error of the linked humidifying IDU is transmitted to the master IDU Digital display Display position (master IDU) Panel or display box Wired controller Error display Spot check interface Error code is not query displayed Master IDU: operates normally. Humidifying IDUs: stop. Other IDUs of the same system: operate Error impact normally.
  • Page 67 8.1.6 A73 - The error of the linked FAPU is transmitted to the master IDU (non-series connection) Note: 1) The type of FAPU may be HRV, VRF fresh air IDU and so on. 2) Series setting: The linked FAPU and the master IDU are connected to the air supply duct and air return duct respective ly and separately.
  • Page 68 8.1.7 A74 - The error of the AHU Kit slave unit is sent to the master unit Note: When multiple AHU Kits are connected in parallel, the master AHU Kit (referred to as the master) communicates with the ODU, and the slave AHU Kit (referred to as the slave) communicates with the master unit. When the slave fails, the slave unit sends a fault signal to the master unit, and the master unit displays ‘A74’...
  • Page 69 8.1.8 A81 - Self-check fault Digital display Display position Error display Panel, display box, and wired controller Faulty IDU: stops. Other IDUs of the same system:  IDUs that share the same MS with the faulty IDU will stop operating, while other IDUs remain in operation.
  • Page 70 8.1.9 A82 - MS (refrigerant flow direction switching device) fault Digital display Display position Faulty IDU Panel, display box, and wired controller Faulty IDU: The fan continues running, and the EEV is closed. Other IDUs of the same system:  IDUs that share the same MS with the faulty IDU: The fan continues running, and the EEV is closed.
  • Page 71 8.1.10 A91 - Mode conflict (SDV5 communication protocol adopted) Available when using SDV5 platform wired controller. Digital display Display position Panel, display box, and wired controller Error display (Note: Error codes are displayed 2 minutes after faults are triggered) Faulty IDU: The fan continues running, and the EEV is closed. Other IDUs of the same system: Error impact operate normally.
  • Page 72 8.1.11 b11, b13 - Error in 1# electronic expansion valve coil, error in 2# electronic expansion valve coil Digital display Display position Error display Panel, display box, and wired controller The faulty IDU stops. Other IDUs of the same system: operate normally. Error impact ODU of the same system: operate normally.
  • Page 73 Note: 1. The error code corresponds to the following two situations: a. If there is only one electronic expansion valve port on the main control board of the IDU, when an error occurs in the electronic expansion valve coil connected to the EEV port, the error code is b05. b.
  • Page 74 8.1.12 b12, b14 - Error in 1# electronic expansion valve body, error in 2# electronic expansion valve body Digital display Display position Panel or display box Wired controller Error display Error code is not Spot check interface query displayed The faulty IDU and other IDUs of the same system: operate normally. Error impact ODU of the same system: operate normally.
  • Page 75 8.1.13 b34, b35 - Stall protection for 1# water pump, stall protection on 2# water pump Digital display Display position Error display Panel, display box, and wired controller The faulty IDU stops. Other IDUs of the same system: operate normally. Error impact ODU of the same system: operate normally.
  • Page 76 8.1.14 b36 - Water level switch alarm error Digital display Display position Error display Panel, display box, and wired controller The faulty IDU stops. Other IDUs of the same system: operate normally. Error impact ODU of the same system: operate normally. The water level switch alarm is triggered when the floater of the water level switch rises to the warning water Error trigger level and lasts for 5 min.
  • Page 77 Note: 1. The plug attached to the WATER port of the main control board corresponds to the following two cases: a. The factory default of IDUs without a water level switch uses a short-circuit plug to seal the WATER port. b.
  • Page 78 8.1.15 C11 - Duplicate IDU address code Digital display Display position Panel or display box Wired controller Error display Error code and address Error code and address code are displayed code flash simultaneously alternately (2) Faulty IDU: The fan continues running, and the EEV is closed. Other IDUs of the same system: The fan continues running, the EEV is closed, and error code "A51"...
  • Page 79 Note: 1. The following table shows the number of addresses and address codes for any IDU with different HP/capabilities. Address code to be queried at the Nominal Number of Number of centralized capacity capacity (HP) Address code IDUs (N) addresses (N) controller or wired (kW) controller (★)
  • Page 80 ★Example: If one IDU is 5 HP and the address code is set to 1, then the query address at the centralized controller side or wired controller side is 1. If one IDU is 20 HP and the address code is set to 5, then this IDU has four address codes, which are 5, 6, 7, and 8, but the query address at the centralized controller side or wired controller side is 5.
  • Page 81 8.1.16 C21 - Abnormal communication between IDU and ODU Digital display Display position Error display Panel, display box, and wired controller Faulty IDU: The fan continues running, and the EEV is closed. Other IDUs of the same system: The fan continues running, the EEV is closed, and error code "A51"...
  • Page 82  If the indoor and outdoor units communicate via Link (M1M2): Cause 1: M1/M2 cable short- Properly connect the circuits or cuts off (1) cable Cause 2: The repeater UP and DOWN ports are not Properly connect the connected to the cable corresponding indoor unit (2) Check the power supply...
  • Page 83 Figure 1 Schematic diagram of Link communication cable connection Upstream IDU and ODU of repeater 1# (including master ODU) Master ODU IDU 10# IDU 1# Repeater 1# Repeater 2# IDU 11# IDU 20# IDU 21# IDU 30# Downstream IDUs of repeater 1# Upstream IDUs Downstream IDUs of repeater 2# of repeater 2#...
  • Page 84 8.1.17 C41 - Abnormal communication between IDU main control board and fan drive board Digital display Display position Error display Panel, display box, and wired controller The faulty IDU stops. Other IDUs of the same system: operate normally. Error impact ODU of the same system: operate normally.
  • Page 85 8.1.18 C51 - Abnormal communication between the IDU and wired controller Note: The error code C51 can be triggered either at the IDU side or at the wired controller side. Digital display Display position Triggered at the wired Triggered at the IDU side controller side The error code "C51"...
  • Page 86 Replace the Cause 1: The communication communication cable that cable material does not meet meets the anti-interference the anti-interference requirements. requirements. Cause 2: Whether the communication cable has a Reconnect the signal line junction or the metal oxidation according to the wiring of the wire head causes the requirements.
  • Page 87 8.1.19 C61 - Abnormal communication between the IDU main control board and display control board Note: The error code C61 can be triggered either at the IDU side or at the panel or display box side. Digital display Display position Triggered at the panel or Triggered at the IDU side Error display...
  • Page 88 Cause 1:Unplug the Reconnect the display box or panel communication cable or communication wire from re-power the IDU the main control board of powered indoor unit. Use correct port by Cause 2:Use a wrong referring to the port w7iring diagram Cause 3:The communication wire between the display...
  • Page 89 8.1.20 C71 - Abnormal communication between AHU Kit slave unit and master unit Note: When multiple AHU Kits are connected in parallel, the master AHU Kit (referred to as the master) communicates with the ODU, and the slave AHU Kit (referred to as the slave) communicates with the master control box. Digital display Display position (master) Error display...
  • Page 90 8.1.21 C72 - Number of AHU Kits is not the same as the set number Note: When multiple AHU Kits are connected in parallel, the master AHU Kit (referred to as the master) communicates with the ODU, and the slave AHU Kit (referred to as the slave) communicates with the master control box. Digital display Display position (master) Error display...
  • Page 91 8.1.22 C73 - Abnormal communication between the linked humidifying IDU and master IDU Digital display Display position (master IDU) Panel or display box Wired controller Error display Spot check interface Error code is not query displayed Master IDU: operates normally. Humidifying IDUs: stop. Other IDUs of the same system: operate Error impact normally.
  • Page 92 8.1.23 C74 - Abnormal communication between the linked FAPU and master IDU (series setting) Note: 1) The type of FAPU may be HRV, VRF fresh air IDU and so on. 2) Series setting: The air supply side of the linked FAPU is directly connected to the air return side of the master IDU through an air duct.
  • Page 93 8.1.24 C75 - Communication fault between linked FAPU and master IDU (non-series setting) Note: 1) The type of FAPU may be HRV, VRF fresh air IDU and so on. 2) Series setting: The linked FAPU and the master IDU are connected to the air supply duct and air return duct respectively a nd separately.
  • Page 94 8.1.25 C76 - Abnormal communication between the main wired controller and secondary wired controller Note: The error code C51 can be triggered either at the IDU side or at the wired controller side. Digital display Display position (secondary wired controller) Error display The error code "C76"...
  • Page 95 8.1.26 C77, C78 - Abnormal communication between IDU main control board and 1# function expansion board, abnormal communication between IDU main control board and 2# function expansion board Digital display Display position Error display Panel, display box, and wired controller Faulty IDU: The fan continues running, and the EEV is closed.
  • Page 96 8.1.27 C79 - Abnormal communication between the IDU main control board and adapter board Digital display Display position Error display Panel, display box, and wired controller Faulty IDU: The fan continues running, and the EEV is closed. Other IDUs of the same system: operate Error impact normally.
  • Page 97 8.1.28 C81—The indoor unit is in a power-off state Digital display Display position Central controller or various types of control terminal Error display software  The faulty indoor unit and the panels, display boxes, and wired controllers connected to it will stop running, and the central controller or various types of control terminal software will display "C81".
  • Page 98 8.1.29 d16 - Air inlet temperature of IDU is too low in heating mode Digital display Display position Error display Panel, display box, and wired controller The faulty IDU stops. Other IDUs of the same system: operate normally. Error impact ODU of the same system: operate normally.
  • Page 99 8.1.30 d17 - Air inlet temperature of IDU is too high in cooling mode Digital display Display position Error display Panel, display box, and wired controller The faulty IDU stops. Other IDUs of the same system: operate normally. Error impact ODU of the same system: operate normally.
  • Page 100 8.1.31 dE1 - Sensor control board fault Digital display Display position Error display Panel, display box, and wired controller The faulty IDU and other IDUs of the same system: operate normally. Error impact ODU of the same system: operate normally. Error trigger If the main control board of an IDU has lost communication with sensor control board for 2 min Error recovery...
  • Page 101 8.1.32 dE2 - PM2.5 sensor fault Digital display Display position Error display Panel, display box, and wired controller The faulty IDU and other IDUs of the same system: operate normally. Error impact ODU of the same system: operate normally. Error trigger If the main control board of an IDU has lost communication with PM2.5 sensor for 2 min Error recovery Automatic recovery...
  • Page 102 8.1.33 dE3 - CO2 sensor fault Digital display Display position Error display Panel, display box, and wired controller The faulty IDU and other IDUs of the same system: operate normally. Error impact ODU of the same system: operate normally. Error trigger If the main control board of an IDU has lost communication with CO2 sensor for 2 min Error recovery Automatic recovery...
  • Page 103 8.1.34 dE4 - Formaldehyde sensor fault Digital display Display position Error display Panel, display box, and wired controller The faulty IDU and other IDUs of the same system: operate normally. Error impact ODU of the same system: operate normally. Error trigger If the main control board of an IDU has lost communication with formaldehyde sensor for 2 min Error recovery Automatic recovery...
  • Page 104 8.1.35 dE5 - Human Detect sensor fault Note: The human detector sensor on the smart panel is used to detect the location of the human body. Digital display Display position Error display Panel, wired controller The faulty IDU and other IDUs of the same system: operate normally. Error impact ODU of the same system: operate normally.
  • Page 105 8.1.36 E21, E24, E81 - T0 (fresh inlet air temperature sensor) short-circuits or cuts off, T1 (IDU return air temperature sensor) short-circuits or cuts off, and TA (outlet air temperature sensor) short-circuits or cuts off Digital display Display position Error display Panel, display box, and wired controller The faulty IDU stops.
  • Page 106 8.1.37 EA2 - Return air humidity sensor fault Digital display Display position Panel or display box Wired controller Error display Spot check interface Error code is not query displayed The faulty IDU and other IDUs of the same system: operate normally. Error impact ODU of the same system: operate normally.
  • Page 107 8.1.38 EC1 - R32 refrigerant leakage sensor fault Check the R32 refrigerant leakage sensor of faulty IDU If the measured refrigerant saturation pressure at the liquid side or gas side is equal to the standard s aturation pressure, there is no refrigerant leak.
  • Page 108 Figure 1 Schematic diagram of the R32 refrigerant leakage detection system 1-1: Common terminal Connecting an 2-2: Sending R32 refrigerant leakage signal alarm or a fan 3-3: Sending sensor module fault signal 1-1/2-2/3-3 AC220V three-core communication cable output (configured on site) S1 button Buzzer Adapter board...
  • Page 109 8.1.39 F01, F11, F21 - T2A (heat exchanger liquid pipe temperature sensor) short-circuits or cuts off, T2 (heat exchanger middle temperature sensor) short-circuits or cuts off, and T2B (heat exchanger gas pipe temperature sensor) short-circuits or cuts off Digital display Display position Error display Panel, display box, and wired controller...
  • Page 110 8.1.40 P31/P34 - Fan drive board AC side overcurrent protection Digital display Display position Error display Panel, display box, and wired controller The faulty IDU stops. Other IDUs of the same system: operate normally. Error impact ODU of the same system: operate normally. ...
  • Page 111 Digital display Display position Error display Panel, display box, and wired controller The faulty IDU stops. Other IDUs of the same system: operate normally. Error impact ODU of the same system: operate normally. Error trigger  Power supply voltage is below the programmed protection threshold (165V) Error recovery ...
  • Page 112 8.1.42 P71 - Main control board EEPROM fault Digital display Display position Error display Panel, display box, and wired controller The faulty IDU stops. Other IDUs of the same system: operate normally. Error impact ODU of the same system: operate normally. When the master chip cannot receive data from EEPROM (EEPROM: a non-volatile memory whose Error trigger data are kept even when powered off)
  • Page 113 8.1.43 P72 - IDU display control board EEPROM fault Digital display Display position Error display Panel or display box The faulty IDU operates normally, and the error code is displayed on the panel or display box only. Other Error impact IDUs of the same system: operate normally.
  • Page 114 8.1.44 U01 - Locked (electronic lock) Digital display Display position Error display Panel, display box, and wired controller All IDUs of the same system: stop running, displaying code "U01" Error impact ODU of the same system: stops running, displaying code "U01" Error trigger When detecting that the ODU is locked Error recovery...
  • Page 115 8.1.45 U11 - Unit model code not set Digital display Display position Error display Panel, display box, and wired controller 1) The faulty IDU stops running. 2) Other IDUs of the same system:  If the address for the faulty IDU has been set, other IDUs will operate normally. If the address of the faulty IDU was not set, other IDUs will display error code "A51"-ODU fault.
  • Page 116 8.1.46 U12 - Capacity(HP) code not set Digital display Display position Error display Panel, display box, and wired controller 1) The faulty IDU stops running. 2) Other IDUs of the same system:  If the address for the faulty IDU has been set, other IDUs will operate normally. If the address of the faulty IDU was not set, other IDUs will display error code "A51"-ODU fault.
  • Page 117 8.1.47 U26 - Mismatch between indoor unit model and outdoor unit model Digital display Display position Error display Panel, display box, and wired controller 1) The faulty IDU stops running. 2) Other IDUs of the same system will operate normally Error impact ODU of the same system: ...
  • Page 118 8.1.48 U38 - Address code not detected Digital display Display position Error display Panel, display box, and wired controller 1) The faulty IDU stops running. 2) Other IDUs of the same system: The fan continues running, the EEV is closed, and ODU error code Error impact "A51"...
  • Page 119 8.1.49 J01 - Motor failed more than once Digital display Display position Error display Panel, display box, and wired controller The faulty IDU stops. Other IDUs of the same system: operate normally. Error impact ODU of the same system: operate normally. Error trigger If fan control faults have occurred 10 times in 120 min (1) Error recovery...
  • Page 120 8.1.50 J1E - IPM (fan module) overcurrent protection Digital display Display position Panel or display box Wired controller Error display Spot check interface Error code is not query displayed The faulty IDU stops. Other IDUs of the same system: operate normally. Error impact ODU of the same system: operate normally.
  • Page 121 8.1.51 J11 - Instantaneous overcurrent protection for phase current Digital display Display position Panel or display box Wired controller Error display Spot check interface Error code is not query displayed The faulty IDU stops. Other IDUs of the same system: operate normally. Error impact ODU of the same system: operate normally.
  • Page 122 8.1.52 J3E - Low bus voltage fault Digital display Display position Panel or display box Wired controller Error display Spot check interface query Error code is not displayed The faulty IDU stops. Other IDUs of the same system: operate normally. Error impact ODU of the same system: operate normally.
  • Page 123 8.1.53 J31 - High bus voltage fault Digital display Display position Panel or display box Wired controller Error display Spot check interface Error code is not query displayed The faulty IDU stops. Other IDUs of the same system: operate normally. Error impact ODU of the same system: operate normally.
  • Page 124 8.1.54 J43 - Phase current sample bias error Digital display Display position Panel or display box Wired controller Error display Spot check interface Error code is not query displayed The faulty IDU stops. Other IDUs of the same system: operate normally. Error impact ODU of the same system: operate normally.
  • Page 125 8.1.55 J45 - Motor and IDU unmatched Digital display Display position Error display Panel, display box, and wired controller The faulty IDU stops. Other IDUs of the same system: operate normally. Error impact ODU of the same system: operate normally. Error trigger If the motor code sent by the IDU main control board is not found in the fan driver Error recovery...
  • Page 126 8.1.56 J47 - IPM (fan module) and IDU unmatched Digital display Display position Error display Panel, display box, and wired controller The faulty IDU stops. Other IDUs of the same system: operate normally. Error impact ODU of the same system: operate normally. Error trigger When detecting that the fan drive board does not match the set value of the driver Error recovery...
  • Page 127 8.1.57 J5E - Motor startup failure Digital display Display position Panel or display box Wired controller Error display Spot check interface Error code is not query displayed The faulty IDU stops. Other IDUs of the same system: operate normally. Error impact ODU of the same system: operate normally.
  • Page 128 8.1.58 J52 - Motor blocking protection Digital display Display position Panel or display box Wired controller Error display Spot check interface Error code is not query displayed The faulty IDU stops. Other IDUs of the same system: operate normally. Error impact ODU of the same system: operate normally.
  • Page 129 8.1.59 J55 - Speed control mode setting error Digital display Display position Panel or display box Wired controller Error display Spot check interface Error code is not query displayed The faulty IDU stops. Other IDUs of the same system: operate normally. Error impact ODU of the same system: operate normally.
  • Page 130 8.1.60 J6E - Phase lack protection of motor Digital display Display position Panel or display box Wired controller Error display Spot check interface Error code is not query displayed The faulty IDU stops. Other IDUs of the same system: operate normally. Error impact ODU of the same system: operate normally.
  • Page 131 9 Appendix 9.1 Temperature Sensor Resistance Characteristics Table 9.1: Indoor temperature sensors resistance characteristics R25=10KΩ±3% B25/50=4100K±3% Temperature Resistance Resistance Resistance Temperature Resistance Resistance Resistance (°C) min(kΩ) Normal(kΩ) max(kΩ) (°C) min(kΩ) Normal(kΩ) max(kΩ) 337.762 388.619 446.732 32.140 34.385 36.753 315.441 362.171 415.450 30.532 32.613...
  • Page 132 Table 9.1: Indoor temperature sensors resistance characteristics(continues) Temperature Resistance Resistance Resistance Temperature Resistance Resistance Resistance (°C) min(kΩ) Normal(kΩ) max(kΩ) (°C) min(kΩ) Normal(kΩ) max(kΩ) 4.926 5.179 5.441 1.060 1.166 1.281 4.718 4.968 5.225 1.025 1.128 1.240 4.521 4.766 5.019 0.990 1.091 1.201 4.333 4.573...
  • Page 133 Table 9.1: Indoor temperature sensors resistance characteristics(continues) Temperature Resistance Resistance Resistance Temperature Resistance Resistance Resistance (°C) min(kΩ) Normal(kΩ) max(kΩ) (°C) min(kΩ) Normal(kΩ) max(kΩ) 0.308 0.351 0.400 0.299 0.342 0.389 0.291 0.332 0.379 0.283 0.324 0.370 0.276 0.315 0.360 0.268 0.307 0.351 0.261 0.299...
  • Page 134 9.2 Ambient Temperature and Standard Saturation Pressure of R410A Table 9.2: Ambient Temperature and Standard Saturation Pressure of R410A (saturated vapor state) Ambient Saturated gauge Saturated Ambient Saturated gauge Saturated Ambient Saturated gauge Saturated gauge Temperature pressure gauge pressure Temperature pressure gauge pressure Temperature...
  • Page 135 Table 9.2: Ambient Temperature and Standard Saturation Pressure of R410A (saturated vapor state)-continue 2961.7 429.55 3487.2 505.78 4083.4 592.25 3032.8 439.87 3567.8 517.47 4175 605.54 3105.2 450.36 3649.9 529.38 4268.3 619.07 3178.9 461.05 3733.5 541.5 4363.5 632.87 3253.9 471.94 3818.6 553.84 4460.5 646.93...
  • Page 136 Table 9.3: Ambient Temperature and Standard Saturation Pressure of R410A (Saturated liquid state) -continue 1739.6 252.31 2505.8 363.44 3495.4 506.96 1787.8 259.3 2568.5 372.54 3575.9 518.64 1837 266.43 2632.4 381.8 3657.9 530.53 1887.1 273.7 2697.5 391.24 3741.3 542.63 1938.2 281.11 2763.7 400.85 3826.2...
  • Page 137 9.3 Ambient Temperature and Standard Saturation Pressure of R32 Table 9.4: Ambient Temperature and Standard Saturation Pressure of R32 Ambient Saturated gauge Saturated Ambient Saturated gauge Saturated Ambient Saturated gauge Saturated gauge Temperature pressure gauge pressure Temperature pressure gauge pressure Temperature pressure pressure...
  • Page 138 Table 9.4: Ambient Temperature and Standard Saturation Pressure of R32 (continue) 3263.1 473.27 3746.3 543.36 4282.9 621.19 3340.1 484.45 3831.9 555.77 4378 634.97 3418.6 495.82 3919 568.4 4474.7 3498.4 507.39 4007.6 581.25 4573.2 663.29 3579.6 519.17 4097.8 594.33 4673.4 677.82 3662.2 531.16 4189.6...
  • Page 140 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.