Airwell WELLEA HT Service Manual
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Airwell WELLEA HT Service Manual

Airwell WELLEA HT Service Manual

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WELLEA HT
Air to Water heat pump
EN
24.AW.WELLEA.HT.SM.R290.EN.25.06
1

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  • Page 1 Service manual WELLEA HT Air to Water heat pump 24.AW.WELLEA.HT.SM.R290.EN.25.06...
  • Page 2 To ensure safe and efficient operation, we recommend that you carry out the necessary maintenance operations regularly. Our After-Sales service can help you with these operations. We hope that you will be satisfied with our services for many years. AIRWELL This manual is referring to the following unit : Designation...

  • Page 3: Table Of Contents

    SUMMARY COMPONENT LAYOUT ................................. 9 1.1. BDHW-040R-04M25 / BDHW-060R-04M25 ........................9 1.2. BDHW-080R-04M25 / BDHW-100R-04M25 ........................12 1.3. BDHW-120R-04M25 / BDHW-140R-04M25 / BDHW-160R-04M25 ................14 1.4. BDHW-120R-04T35 / BDHW-140R-04T35 / BDHW-160R-04T35..................16 Piping diagram ..................................18 2.1. 4-16 kW (With electric heater) ............................18 CONTROL LOGIC ..................................
  • Page 4 6.2.2. Cooling settings ..............................42 6.2.3. Heating setting ................................ 44 6.2.4. Auto mode setting ..............................46 6.2.5. Temp. type setting ..............................46 6.2.6. Room thermostat setting............................48 6.2.7. Other Heat Source Menu ............................49 6.2.8. Holiday away setting ............................... 53 6.2.9.
  • Page 5 11. WELLEA M HT PCBs ................................... 84 11.1. Main Control PCB ................................ 84 11.2. Inverter PCB ................................87 11.2.1. BDHW-040R-04M25 / BDHW-060R-04M25 ......................87 11.2.2. BDHW-080R-04M25 / BDHW-100R-04M25 ......................88 11.2.3. BDHW-120R-04M25 / BDHW-140R-04M25 / BDHW-160R-04M25 ............... 89 11.2.4. BDHW-120R-04T35 / BDHW-140R-04T35 / BDHW-160R-04T35 ................90 11.3.
  • Page 6 13.8. E3, E4, E7, Eb, EC, Ed, HA, H9 Troubleshooting ......................113 13.8.1. Digital display output ............................113 13.8.2. Description ................................113 13.8.3. Procedure ................................115 13.9. H5 Troubleshooting ..............................116 13.9.1. Digital display output ............................116 13.9.2. Description ................................116 13.9.3.
  • Page 7 13.17.3. Procedure ................................. 133 13.18. HP Troubleshooting..............................134 13.18.1. Digital display output ............................134 13.18.2. Description ............................... 134 13.18.3. Procedure ................................. 135 13.19. bA Troubleshooting ..............................136 13.19.1. Digital display output ............................136 13.19.2. Description ............................... 136 13.19.3. Procedure ................................. 136 13.20.
  • Page 8 13.27.2. Description ............................... 151 13.27.3. Procedure ................................. 151 13.28. Pb Troubleshooting ..............................152 13.28.1. Digital display output ............................152 13.28.2. Description ............................... 152 13.29. C2 Troubleshooting ..............................153 13.29.1. Digital display output ............................153 13.29.2. Description ............................... 153 13.29.3. Procedure ................................. 153 13.30.

  • Page 9: Component Layout

    1. COMPONENT LAYOUT 1.1.BDHW-040R-04M25 / BDHW-060R-04M25...

  • Page 12: Bdhw-080R-04M25 / Bdhw-100R-04M25

    1.2.BDHW-080R-04M25 / BDHW-100R-04M25...

  • Page 14: Bdhw-120R-04M25 / Bdhw-140R-04M25 / Bdhw-160R-04M25

    1.3.BDHW-120R-04M25 / BDHW-140R-04M25 / BDHW-160R-04M25 Pin valve...

  • Page 16: Bdhw-120R-04T35 / Bdhw-140R-04T35 / Bdhw-160R-04T35

    1.4.BDHW-120R-04T35 / BDHW-140R-04T35 / BDHW-160R-04T35 Pin valve...

  • Page 18: Piping Diagram

    2. PIPING DIAGRAM 2.1.4-16 kW (With electric heater) Item Description Item Description Compressor Electronic expansion valve Temperature sensor (plate heat exchanger inlet Temperature sensor (compressor discharge) refrigerant: cooling) Temperature sensor (compressor suction) Liquid reservoir High pressure switch Temperature sensor (water inlet) High pressure sensor Heat tape (plate heat exchanger) Temperature sensor (plate heat exchanger...
  • Page 19 Compressor: • The refrigerant is compressed to very high pressures in the compressor, while its temperature is also raised. When the refrigerant enters a compressor, it is in a gaseous state at low pressure and low temperature and exits the compressor at high pressure and high temperature in a gaseous state.
  • Page 20 Internal backup heater: • To Provide additional heating capacity when the heating capacity of the heat pump is insufficient due to very low outdoor temperature. Also protects the external water piping from freezing. Automatic air purge valve: • To automatically remove air from the water circuit. Water flow switch: •...

  • Page 21: Control Logic

    3. CONTROL LOGIC 3.1.Reference diagram...

  • Page 22: Stop Operation

    3.2.Stop operation The stop operation occurs for one of the following reasons: • Abnormal shutdown: in order to protect the compressors, if an abnormal state occurs the system makes a stop with thermo off operation and an error code is displayed on the outdoor unit PCB digital displays and on the user interface.

  • Page 23: Compressor Startup Program

    3.4.2.Compressor startup program In initial startup control and in re-start control, compressor startup is controlled according to outdoor ambient temperature. Compressor startup follows one of two startup programs until the target rotation speed is reached. 4-10kw compressor startup program when cooling mode ambient temperature is above 12°C & when heating mode ambient temperature is above 0°C 4-10kw compressor startup program when cooling mode ambient temperature is below 12°C &...
  • Page 24 12-16kw compressor startup program when cooling mode ambient temperature is above 12°C & when heating mode ambient temperature is above 0°C 12-16kw compressor startup program when cooling mode ambient temperature is below 12°C & when heating mode ambient temperature is below 0°C...

  • Page 25: Startup Control For Heating And Domestic Hot Water Operation

    3.5.Startup control for Heating and Domestic Hot Water operation Component Wiring diagram label 4-16kW Control functions and states Compressor startup program selected according to Inverter compressor COMP ● ambient temperature1 DC fan motor ● Fan run at maximum speed2 Position (steps) from 0 (fully closed) to 480 (fully open), controlled according to outdoor ambient Electronic expansion valve ●...

  • Page 26: Normal Operation Control

    3.7.Normal operation control 3.7.1.Component control during normal operation Component control during heating and domestic hot water operations Component Wiring diagram label 4-16kW Control functions and states Controlled according to load requirement from Inverter compressor COMP ● temperature set and outlet water temperature Controlled according to outdoor heat exchanger pipe DC fan motor ●...

  • Page 27: Four-Way Valve Control

    3.7.4.Four-way Valve Control The four-way valve is used to change the direction of refrigerant flow through the water side heat exchanger in order to switch between cooling and heating/DHW operations. During heating and DHW operations, the four-way valve is off; during cooling and defrosting operations, the four-way valve is on.

  • Page 28: Protection Control

    4. PROTECTION CONTROL 4.1.High pressure protection control This control protects the refrigerant system from abnormally high pressure and protects the compressor from transient spikes in pressure. High pressure protection control Normal operation > 3.5MPa < 2.6MPa High pressure protection, error code P1 is displayed Notes: 1.

  • Page 29: Discharge Temperature Protection Control

    4.3.Discharge temperature protection control This control protects the compressor from abnormally high temperatures and transient spikes in temperature. High discharge temperature protection control Normal operation Discharge temperature > 115°C Discharge temperature < 95°C High discharge temperature protection, error code P4 is displayed When the discharge temperature rises above 115°C the system displays P4 protection and the unit stops running.

  • Page 30: Compressor Current Protection Control

    4.4.Compressor current protection control This control protects the compressor from abnormally high currents. Compressor current protection control Normal operation Current > Current Current < Current Compressor current protection, error code P3 is displayed Current limitation for ODU Model 1-ph 4-6kw 1-ph 8-10kw 1-ph 12-16kw 3-ph 12-16kw...

  • Page 31: Dc Fan Motor Protection Control

    4.6.DC fan motor protection control This control protects the DC fan motors from strong winds and abnormal power supply. DC fan motor protection occurs when any one of the following conditions are met: Fan speed continues to be less than 50rpm more than 40S from the set fan step＞0 •...
  • Page 32 Anti-freezing control in Cooling mode Cooling mode Min(Twout,Twin,T1)<4°C and lasts 5s Compressor stops, water pump keeps running at the maximum output for 5 mins Min(Twout,Twin,T1)≥ 8°C Anti-freezing protection in cooling mode Turn to Off Status and running anti-freezing has been running over 30mins control in Off status Compressor stops, water pump keeps running at the maximum output...
  • Page 33 Anti-freezing control in Off status/ Heating mode/ DHW mode Off Status / Heating mode / DHW mode Turn to Off Status 1.T4<3° C ，and Min(Twout,Twin,T1)<4 lasts 5s 2.Min(Twout,Twin,T1)<2°C Compressor stops, water pump keeps running at the maximum output for 5 mins Min(Twout,Twin,T1)<8°C Heat Pump turns to heating mode Min(Twout,Twin,T1)<15...

  • Page 34: Special Control

    5. SPECIAL CONTROL 5.1.Oil return operation In order to prevent the compressor from running out of oil, the oil return operation is conducted to recover oil that has flowed out of the compressor and into the refrigerant piping. When the oil return operation is being conducted, the outdoor unit refrigerant system main PCB displays code d0.

  • Page 35: User Interface Field Settings

    6. USER INTERFACE FIELD SETTINGS 6.1.Introduction During installation, the parameters setting should be configured by the installer to suit the installation configuration, climate conditions and end-user preferences. The relevant settings are accessible and programmable through the FOR SERVICEMAN menu on the user interface. The user interface menus and settings can be navigated using the touch- sensitive keys.

  • Page 36: For Serviceman Menu

    6.2.For Serviceman menu For serviceman allows installers to input the system configuration and set the system parameters. Press simultaneously for 3 seconds to enter the authorization page. Press to navigate cursor and press to adjust the numerical values. The password is 234. Press to enter For serviceman menu.

  • Page 37: Dhw Setting

    6.2.1.DHW setting 6.2.1.1.DHW mode DHW mode defines whether hot water demand is needed. Setting Description Enable DHW mode if DHW tank is installed. Disable DHW mode if DHW tank is not installed. In this case, no need to define other settings in DHW setting. 6.2.1.2.Disinfect, T5S_DISINFECT, t_DI_HIGHTEMP, t_DI_MAX Disinfect defines whether disinfection function is activated.
  • Page 38 6.2.1.3.DHW priority, DHW priority time set, t_DHWHP_RESTRICT, t_DHWHP_MAX DHW priority defines whether domestic hot water or space heating /cooling takes priority. Setting Description When DHW demand and space heating/cooling demand both exist, heat pump will heat the water according to the setting of DHW priority time set, t_DHWHP_RESTRICT, t_DHWHP_MAX When DHW demand and space heating/cooling demand both exist, heat pump will heat the water after space heating/cooling demand is satisfied.
  • Page 39 t_DHWHP_R t_DHWHP_M PRIORITY Heating/Cooling turns to DHW DHW turns to Heating/Cooling PRIORITY ESTRICT TIME SET DHW mode OFF DHW mode ON & T5≥MIN(T5S, T5STOP) T5<MIN(T5S,T5STOP)-dT5_ON A min B min & DHW mode operates for B mins Heating/Cooling mode operates & for A mins Heating/Cooling mode ON DHW mode OFF...
  • Page 40 6.2.1.4.Pump_D, PUMP_D TIMER, PUMP_D RUNNING TIME, PUMP_D DISINFECT DHW pump (Pump_D) is installed to circulate the water in the DHW pipe network. Setting Description Installation with DHW pump. Installation without DHW pump. PUMP_D TIMER defines whether DHW pump operation schedule which is defined in the user menu is activated. Setting Description Enable DHW pump run in timer.
  • Page 41 6.2.1.6.dT1S5 dT1S5: Temperature difference between leaving water set temperature and tank water temperature modification value. Leaving water set temperature (T1S) for DHW mode is calculated by formula: T1S = T5 + △dT1S5 + dT1S5 T1S: Leaving water set temperature T5: DHW tank water temperature dT1S5: Temperature modification value related to DHW tank water temperature(T5) △...

  • Page 42: Cooling Settings

    6.2.2.Cooling settings 6.2.2.1.Cooling mode Cooling mode defines whether space cooling demand is needed. Setting Description Enable cooling mode if space cooling terminals are installed. Disable cooling mode if space cooling terminals are not installed. In this case, no need to define other settings in Cooling mode.
  • Page 43 6.2.2.5.dTSC dTSC define room temperature hysteresis of activating heat pump. dTSC is only applicable if 1 is selected for Room temp. in the 1.5.3 Temp. type setting. When Ta – TS ≥ dTSC and heat pump is within operating ambient temperature range, heat pump provides chilled water to space cooling terminals.

  • Page 44: Heating Setting

    6.2.3.Heating setting 6.2.3.1.Heating mode Heating mode defines whether space heating demand is needed. Setting Description Enable heating mode if space heating terminals are installed. Disable heating mode if space heating terminals are not installed. In this case, no need to define other settings in Heating mode.
  • Page 45 6.2.3.5.dTSH dTSH defines room temperature hysteresis of activating heat pump. dTSH is only applicable if 1 is selected for Room temp. in the Temp. type setting. When TS – Ta ≥ dTSH and heat pump is within operating ambient temperature range, heat pump provides hot water to the space heating terminals Abreviations: Ta: Actual room temperature...

  • Page 46: Auto Mode Setting

    6.2.4.Auto mode setting 6.2.4.1.T4AUTOCMIN, T4AUTOHMAX T4AUTOCMIN defines the ambient temperature below which the heat pump will not provide chilled water for space cooling in auto mode. T4AUTOHMAX defines the ambient temperature above which the heat pump will not provide hot water for space heating in auto mode.
  • Page 47 6.2.5.1.Water flow temp. Water flow temp. defines whether heat pump is controlled by leaving water temperature. Setting Description Heat pump is controlled by leaving water temperature. Heat pump is not controlled by leaving water temperature. 6.2.5.2.Room temp. Room temp. defines whether heat pump is controlled by room temperature detected by the temperature sensor inside the wired controller.

  • Page 48: Room Thermostat Setting

    6.2.6.Room thermostat setting Room thermostat can be as an alternative solution to control heat pump. Setting Description Wired controller is used to Control heat pump ON/OFF • • Without room thermostats(means 1.3.5 Temp. type setting is Define water temperature • •...

  • Page 49: Other Heat Source Menu

    6.2.7.Other Heat Source Menu 6.2.7.1.IBH FUNCTION, IBH LOCATE, dT1_IBH_ON, t_IBH_DELAY, T4_IBH_ON, P_IBH1, P_IBH2 IBH FUNCTION defines backup heater function. Setting Description IBH is used for heating mode and DHW mode IBH is used for heating mode IBH LOCATE defines backup heater/auxiliary heating source installation location Setting Description Pipe loop...
  • Page 50 Diagram below illustrates the effects of T4_IBH_ON, T4HMIN and T4HMAX. Abreviations: T4: Outdoor ambient temperature IBH: Electric heater T4HMIN: The ambient temperature below which the heat pump will not operate in heating mode. T4HMAX: The ambient temperature above which the heat pump will operate heating mode with lowest compressor frequency. P_IBH1 defines heating capacity of IBH1, which is used for energy consumption statistics.
  • Page 51 Diagram below illustrates the effects of T4_AHS_ON, T4HMIN and T4HMAX. Abreviations: T4: Outdoor ambient temperature AHS: Auxiliary heating source T4HMIN: The ambient temperature below which the heat pump will not operate in heating mode. T4HMAX: The ambient temperature above which the heat pump will operate heating mode with lowest compressor frequency. 6.2.7.3.EnSWITCHPDC, GAS_COST, ELE_COST EnSWITCHPDC defines whether heat pump and additional heating source switch automatically based on economic performance and system high efficiency.
  • Page 52 Diagram below illustrates the effects of MAX_SETHEATER, MIN_SETHEATER, MAX_SIGHEATER and MIN_SIGHEATER. 6.2.7.5.TBH FUNCTION, dT5_TBH_OFF, t_TBH_DELAY, T4_TBH_ON, P_TBH TBH FUNCTION defines whether tank booster heater function is activated. Setting Description Disable tank booster heater function Enable tank booster heater function dT5_TBH_OFF defines water temperature hysteresis of inactivating tank booster heater when heat pump malfunctions. When T5 >...

  • Page 53: Holiday Away Setting

    Diagram below illustrates the operation of heat pump and tank booster heater of DHW mode. Abbreviations: T5S: DHW set temperature T5stop: DHW mode leaving water temperature operating limit TBH: Immersion heater 6.2.7.6.Solar function, Solar control, Deltasol Solar function defines whether the heating system is equipped with solar function. Setting Description Without solar function.

  • Page 54: Service Call

    T1S_H.A._H defines heat pump leaving water temperature for space heating mode during holiday away mode. T5S_H.M_DHW defines domestic hot water tank temperature for DHW mode during holiday away mode. 6.2.9.Service call Phone number and Mobile number define after-sales service contact numbers. Press to navigate cursor and press to adjust the numerical values.
  • Page 55 During test run, all buttons except are invalid. If you want to turn off the test run, please press . For example, when the unit is in air purge mode, after you press , the following page will be displayed: 6.2.11.1.Point check The POINT CHECK menu is used to check the operation of individual components.
  • Page 56 Air purge running time defines the period that Pump_I operates during the air purge process. Status check allows installers to check the real-time operation parameters of air purge operation.
  • Page 57 6.2.11.3.Circulated pump running Circulated pump running operation is used to check the operation of the circulation pump. When circulation pump running is turned on, all running components will stop. 60 seconds later, the SV1 will be off, the SV2 will be on. 60 seconds later Pump_I will operate. 30s later, if the flow switch checked normal flow, PUMP_I will operate for 3min.

  • Page 58: Special Function

    6.2.11.6.DHW running The DHW running operation is used to check the operation of the system in DHW mode. During DHW running test running, the default target temperature of the domestic water is 55°C. The TBH(tank boost heater) will turn on after the compressor runs for 10min. The TBH will turn off 3 minutes later. Heat pump will operate until the water temperature increase to a certain value or the next command is received.
  • Page 59 Diagram below illustrates the operation of Preheating for floor function. Abbreviations: T1: Leaving water temperature dT1SH: Water temperature hysteresis of activating heat pump. t_interval_H: The delayed start-up time of compressor in heating mode. 6.2.12.2.Floor drying up For newly-installed under-floor heating systems, floor drying up is necessary to remove moisture from the floor slab and subfloor to prevent warping or rupture of the floor.

  • Page 60: Auto Restart

    Floor drying up Setting Description Disable floor draying up function Enable floor draying up function t_Dryup defines the duration of Phase 1. t_Highpeak defines the duration of Phase 2. t_Drydown defines the duration of Phase 3. t_Drypeak defines the heat pump leaving water temperature of Phase 2. Start time defines the floor drying up operation start time.

  • Page 61: Power Input Limitation

    6.2.14.Power input limitation Power input limitation makes the machine suitable for a variety of current supplies. There are 8 configurations for user to choose according to the maximum allowable access current. If the unit will operate at larger current input, 1 should be selected.

  • Page 62: Cascade Setting

    T1T2 defines control options of Port T1T2 Setting Description Installation with MH-kit Installation without MH-kit Tbt defines whether balance tank temperature sensors are installed in the balance tank. Setting Description Installation with balance tank temperature sensor(Tbt) Installation without balance tank temperature sensor(Tbt) P_X PORT can be defined as defrosting signal or alarm signal according to customers’...

  • Page 63: Common Setting

    STOP BIT set upper computer stop bit(1: STOP BIT1; 2:STOP BIT2) Setting Description Stop bit 1 Stop bit 2 6.2.18.Common setting 6.2.18.1.t_DELAY PUMP t_DELAY PUMP defines the delayed stop time of Pump_I. Pump_I will stop t_DELAY PUMP minutes later after compressor stops base on system temperature equalization consideration.

  • Page 64: C2 Fault Restore

    6.2.18.6.Energy metering Energy metering allows user to check energy data of day, week, month and year. Setting Description Disable energy metering function Enable energy metering function 6.2.18.7.Pump_O Pump_O defines Zone 1 pump(Pump_O) control type. Setting Description Pump_O keeps running Pump_O operation is controlled by heat pump 6.2.19.C2 fault restore For the unit with IBH(internal backup heater), when C2 error occurs, please follow C2 troubleshooting guide of Part4 Diagnosis and Troubleshooting.

  • Page 67: Usb Function Field Settings

    7. USB FUNCTION FIELD SETTINGS USB function helps you to transmit parameters and program easily. When USB disk connect to CN4 port of main control PCB, the USB function interface appears automatically on the wired controller. Main control PCB CN4 USB port USB function interface Sub-function 1: Sub-function 3:...
  • Page 68 Sub-function 2: Please make sure there is only one parameter file in the USB disk before using this function. Sub-function 3: Please make sure there is only one applicable hydraulic system program in the USB disk before using this function. Sub-function 4: Please make sure there is only one applicable refrigerant system program in the USB disk before using this function.

  • Page 69: Service Information

    8. SERVICE INFORMATION DANGER！ • These instructions are exclusively intended for qualified contractors and authorized installers • Work on the refrigerant circuit with flammable refrigerant in safety group A2L may only be carried out by authorized heating contractors. These heating contractors must be trained in accordance with EN 378 Part 4 or IEC 60335-2-40, Section HH.

  • Page 70: Check Of Refrigeration Equipment

    8.3.Check of Refrigeration Equipment Where electrical components are to be changed, they should be fit for the intended purpose and comply with the correct specifications. Always follow the manufacturer’s maintenance and service guidelines. In case of any doubt, consult the manufacturer’s technical department for assistance.

  • Page 71: Repair Of Intrinsically Safe Components

    Ensure that all apparatuses are mounted securely. Ensure that seals or sealing materials have not degraded such that they can no longer prevent the ingress of flammable atmospheres. Parts for replacement should be in accordance with the manufacturer s specifications. The use of silicon sealant may inhibit the effectiveness of some types of leak detection equipment.
  • Page 72 8.8.3.1.Removal and evacuation When breaking into the refrigerant circuit for repair or any other purpose, follow the conventional procedures. However, it is important to follow the best practice since flammability should be considered. Operate as per the following procedure: Remove refrigerant; •...

  • Page 73: R290 System Service

    using the recovery equipment, check and verify that it works properly and has been properly maintained, and that any associated electrical components are sealed to prevent ignition in the event of a refrigerant leakage. Consult the manufacturer in case of any doubt. The recovered refrigerant should be returned to the refrigerant supplier in correct recovery cylinders, with the relevant Waste Transfer Note arranged.

  • Page 74: Warning About The R290 Refrigerant

    8.9.1.Warning about the R290 refrigerant The following information indicates a hazard with a medium level of risk which, if not avoided, could result in death or serious injury. The following applies to R290 refrigerant systems. Prior to beginning work on systems containing flammable refrigerants, safety checks are necessary to ensure that the risk of ignition is minimized.
  • Page 75 Ensure that the area is in the open or that it is adequately ventilated before breaking into the system or conducting any hot work. A degree of ventilation shall continue during the period that the work is carried out. The ventilation should safely disperse any released refrigerant and preferably expel it externally into the atmosphere.
  • Page 76 Ensure that seals or sealing materials have not degraded such that they no longer serve the purpose of preventing the ingress of flammable atmospheres. Replacement parts shall be in accordance with the manufacturer’s specifications. Do not apply any permanent inductive or capacitance loads to the circuit without ensuring that this will not exceed the permissible voltage and current permitted for the equipment in use.
  • Page 77 short as possible to minimize the amount of refrigerant contained in them. Prior to recharging the system it shall be pressure tested with OFN. DD.12 Decommissioning: Before carrying out this procedure, it is essential that the technician is completely familiar with the equipment and all its detail.

  • Page 78: Qualification Requirements For Maintenance Personnel

    The recovery equipment shall be in good working order with a set of instructions concerning the equipment that is at hand and shall be suitable for the recovery of flammable refrigerants. In addition, a set of calibrated weighing scales shall be available and in good working order. Hoses shall be complete with leak-free disconnect couplings and in good condition.

  • Page 79: Electric Wiring Diagram

    9. ELECTRIC WIRING DIAGRAM 9.1.1Ph 4-16kW...

  • Page 81: 3Ph 12-16Kw

    9.2.3Ph 12-16kW...

  • Page 83: Electric Box

    10.ELECTRIC BOX Note: Main Control PCB consists of Refrigerant system and hydronic system, which is sealed in the hermetic electric control box and placed vertically for safety consideration. The hermetic electric control box of inverter PCB is available to be took out entirely. If there’s something wrong with inverter PCB, it’s suggested to unscrew the cover to identify whether inverter PCB failed (Refer to part 4 Appendix: Guide for identifying inverter PCB failure) and replace the whole inverter control box entirely.

  • Page 84: Wellea M Ht Pcbs

    11.WELLEA M HT PCBS 11.1.Main Control PCB...
  • Page 85 Label Port Code Content Rated Voltage CN21 POWER Port for power supply 230VAC S1,S2,S3,S5,S6,SW9 Dip switch CN33 EEV1 Port for electrical expansion valve1 0-12V DC H-SEN Port for high pressure sensor 0-5V DC CN46 L-SEN Port for low pressure sensor 0-5V DC CN35 RS485 ;...
  • Page 86 ( Port7,8) - Port for SV3(3-way valve) (Port9,10,11,12) - Port for zone 2 pump(P_c) / zone 1 pump(P_o) / solar energy pump(P_s) / pipe pump(P_d) (Port13) - Control port for tank booster heater (Port14) - Control port for internal backup heater 1 (Port15) - Control port for internal backup heater (Port24) - Reserved Port for USB...

  • Page 87: Inverter Pcb

    11.2.Inverter PCB 11.2.1.BDHW-040R-04M25 / BDHW-060R-04M25 Label Port Code Content Voltage Above 156V DC (varying according to CN32 DC fan power ports frequency) CN12 Port for communication with Main Control PCB 0-5V DC CN25 H-pro Connect to high pressure switch 0-5V DC L_IN Power input L of inverter PCB 230V AC...

  • Page 88: Bdhw-080R-04M25 / Bdhw-100R-04M25

    11.2.2.BDHW-080R-04M25 / BDHW-100R-04M25 Label Port Code Content Voltage CN32 DC fan power ports Above 156V DC (varying according to frequency) CN12 Port for communication with Main Control PCB 0-5V DC CN25 H-pro Connect to high pressure switch 0-5V DC CN1 L_IN Power input L of inverter PCB 230V AC CN2 N_IN...

  • Page 89: Bdhw-120R-04M25 / Bdhw-140R-04M25 / Bdhw-160R-04M25

    11.2.3.BDHW-120R-04M25 / BDHW-140R-04M25 / BDHW-160R-04M25 Label Port Code Content Voltage Power output U of inverter PCB to compressor Above 156V DC (varying according to frequency) Power output V of inverter PCB to compressor Above 156V DC (varying according to frequency) Power output W of inverter PCB to compressor Above 156V DC (varying according to frequency) CN32...

  • Page 90: Bdhw-120R-04T35 / Bdhw-140R-04T35 / Bdhw-160R-04T35

    11.2.4.BDHW-120R-04T35 / BDHW-140R-04T35 / BDHW-160R-04T35 Label Port Code Content Voltage Power input L1 of inverter PCB Phase to phase voltage 380VAC Power input L2 of inverter PCB Phase to phase voltage 380VAC Power input L3 of inverter PCB Phase to phase voltage 380VAC Ground Ground Pre-charge...

  • Page 91: Ibh Pcb

    11.3.IBH PCB 11.3.1.1Ph 3kW IBH PCB Label Port Code Content Voltage CN22 Power input L of IBH PCB Phase to phase voltage 230VAC 3KW-2 Power input N of 3KW IBH Phase to phase voltage 230VAC 3KW-1 Power input L of 3KW IBH Phase to phase voltage 230VAC CN17 TRANS OUT...

  • Page 92: 3Ph 9Kw Ibh Pcb

    11.3.2.3Ph 9kW IBH PCB Label Port Code Content Voltage CN22 L1 L2 L3 Power input L1/L2/L3 of IBH PCB Phase to phase voltage 380VAC 3KW-3 Power input L3 of 3KW IBH Phase to phase voltage 380VAC 6KW-3 Power input L3 of 6KW IBH Phase to phase voltage 380VAC 3KW-2 Power input L2 of 3KW IBH...

  • Page 93: Digital Display Output

    11.4.Digital Display Output Digital display output in different operating states Outdoor unit state Parameters displayed on Main Control PCB DSP1 On standby Normal operation The current frequency of compressor Error or protection Error or protection code 11.5.DIP Switch Settings The DIP switch S3 on the Main Control PCB is used for setting the Modbus address. By defaulting the units have this DIP switch positioned=0/0/0 Dip switch (ON=1, OFF=0)

  • Page 95: Error Code

    12.ERROR CODE Water circuit error Error code Description Displayed on water flow failure (10 times of E8) User Interface and Main Control PCB water flow protection User Interface and Main Control PCB Communication error Error code Description Displayed on Communication fault between User Interface and Main User Interface and Main Control PCB Control PCB Communication error of Main Control PCB...
  • Page 96 Voltage error Error code Description Displayed on Phase loss or phase reversal User Interface and Main Control PCB For 3Ph units Power overvoltage and Power under-voltage protection User Interface and Main Control PCB Protection code Error code Description Displayed on Low pressure protection User Interface and Main Control PCB High pressure switch protection...
  • Page 97 PED bH error Main Control PCB PFC hardware overcurrent protection Main Control PCB For 3Ph units Instantaneous overcurrent of PFC software protection Main Control PCB For 3Ph units PFC software continuous 30 s overcurrent protection Main Control PCB For 3Ph units PFC low voltage protection Main Control PCB For 3Ph units...

  • Page 98: Troubleshooting

    13.TROUBLESHOOTING 13.1.Warning WARNING！ All electrical work must be carried out by competent and suitably qualified, certified and 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). Power-off the outdoor units before connecting or disconnecting any connections or wiring, otherwise electric ...

  • Page 99: E0, E8 Troubleshooting

    13.2.E0, E8 Troubleshooting 13.2.1.Digital display output 13.2.2.Description Error code Description water flow failure water flow protection 5 times of No-water detection failures in a row before pump on No-water detection failures before pump on or Triggering water flow switch breaks after pump on within 10 times of E8 in a row when do running- water 10 times detection after pump on...

  • Page 100: Procedure

    Layout of main component E0(**%) /E8(**%) is displayed on the User Interface. The percentage indicates possible cause of water flow failure, which is illustrated as note 1. User Interface Correct Dip switch 13.2.3.Procedure E0 / E8: Water flow failure No water flow before the pump starts No water flow before the pump starts Check the error code E0(**%) /E8(**%) displayed on the User Interface, and the percentage is...
  • Page 101 Check the water pump indicator lights, and it shows water pump is normal (Willo water pump green light Check the details of Note 2 indicates normal ; Xinjie water pump 5 lights all on indicates normal) 1.Open the waterway ball valve which is connected Check the water circuit, and it is abnormal: to the unit 1.The ball valve which is connected to the unit is...
  • Page 102 Note 1 : The meaning of percentage of water pump output(displayed on the user interface) Percentage Water pump model Brand Description Para 25/9 IPWM-130-1 WILO IPWM connection port short circuited APM25-9-130/180 SHIMGE PWM feedback signal loss Para 25/9 IPWM-130-1 WILO Pump Standby APM25-9-130/180 SHIMGE...
  • Page 103 Note 3: The possible error and solutions of water pump The possible causes of water pump failure and solutions Description Possible cause Solution Water pump leak Replace the sealing ring Water inlet and outlet pipe connected Connect the pipe correctly. reversely.

  • Page 104: E2 Troubleshooting

    13.3.E2 Troubleshooting 13.3.1.Digital display output 13.3.2.Description Error code Description Communication fault between User Interface and Main Control PCB Main Control PCB side: Communication failure with User Interface lasts 2 mins Or Triggering User Interface side: No communication reply from Main Control PCB for 1 min Relative ports X/HA、Y/HB and locations...

  • Page 105: H0 Troubleshooting

    13.4.H0 Troubleshooting 13.4.1.Digital display output 13.4.2.Description Error code Description Communication error of Main Control PCB Triggering Communication failure lasts 1 min 13.4.3.Procedure H0: Communication error of Main Control Replace the Main Control PCB...

  • Page 106: H1 Troubleshooting

    13.5.H1 Troubleshooting 13.5.1.Digital display output 13.5.2.Description Error code Description Communication error between Main Control PCB and inverter PCB Triggering Communication failure occurs after powering on the unit for 2 mins CN43 COMM (Main Control PCB) LED2 & BUS voltage(P-N) (1 Ph Inverter PCB) Relative ports and locations LED2...

  • Page 107: Procedure

    13.5.3.Procedure For 1Ph models H1：Communication error between Main Control PCB and Inverter PCB Check whether power supply for ODU is abnormal.( The normal range Adjust power supply is around 190-264V Check whether the LED2 on inverter If yes, replace the Main PCB is off Measure the voltage of the fifth and Control PCB...
  • Page 108 For 3Ph models H1：Communication error between Main Control PCB and Inverter PCB Check whether power supply for ODU is abnormal.( The normal 1. Adjust power supply range is around 342-456V) 2. Connect L1,L2,L3 correctly and firmly Check whether there is loss of L1, L2, or L3 Check whether the LED2 on inverter If yes, replace the Main...

  • Page 109: Hd Troubleshooting

    13.6.Hd Troubleshooting 13.6.1.Digital display output 13.6.2.Description Error code Description Communication fault between master unit and slave unit. For cascade system, the communication failure between master unit and Triggering slave unit lasts 2mins and above Communication port E1/H1/H2 Dip switch S3-1/2/3 0/0/0=address 0#（Master) 1/0/0=address 1#（Slave) 0/1/0=address 2#（Slave)

  • Page 110: Procedure

    13.6.3.Procedure Hd：The communication fault between master unit and slave unit. Check “Unit Status-Operation parameter- Online unit number” on the User Interface, and the number is consistent with the actual unit number Communication cables between port H1H2E1 was Reconnect the communication cables securely disconnected, or misconnected Communication cables between port H1H2E1 have Replace the communication cables...

  • Page 111: E5, E6, E9, Ea, Fc1, H2, H3 Troubleshooting

    13.7.E5, E6, E9, EA, FC1, H2, H3 Troubleshooting 13.7.1.Digital display output 13.7.2.Description Code Description Port Location T3 Outdoor unit heat exchanger bottom CN34 temperature sensor error T4 Ambient temperature sensor error CN45 Th Return-air temperature sensor error Tp Discharge temperature sensor error CN50 TL Outdoor unit heat exchanger outlet temperature sensor error...

  • Page 112: Procedure

    13.7.3.Procedure E5, E6, E9, EA, FC1, H2, H3： Temperature sensor error Temperature sensor connection on Main Control PCB Reconnect the temperature sensor correctly and is loose, misconnected, broken or moisturized keep it dry Pull out temperature sensor, measure sensor resistance: If the resistance is too low(<...

  • Page 113: E3, E4, E7, Eb, Ec, Ed, Ha, H9 Troubleshooting

    13.8.E3, E4, E7, Eb, EC, Ed, HA, H9 Troubleshooting 13.8.1.Digital display output 13.8.2.Description Code Description Port Location (Main Control PCB) T1 Electric Heater/AHS water outlet CN39 temperature sensor error T5 Water tank temperature sensorerror CN13 Tbt Balance tank temperature sensor/ CN24 Final outlet water temperature of cascade system sensor error...
  • Page 114 Note 1: DIP switch settings or User Interface settings Code Description Main Control PCB can not detect the right sensor value. IBH function is on(Dip switch S1-3/4 is set IBH available, and User Interface- For Serviceman - Other heat source – IBH function=1) ,while Main Control PCB can not detect the right T1 sensor value. AHS function is on (User Interface- For Serviceman - Other heat source - AHS function=1), while Main Control PCB can not detect the right T1 sensor value.

  • Page 115: Procedure

    13.8.3.Procedure E3, E4, E7, Eb, EC, H9: Temperature sensor error Check the Dip switch settings or User Interface settings Reset dip switch, and reboot the unit, make sure as illustrated above parameter are set available Temperature sensor connection on Main Control PCB Reconnect the temperature sensor correctly and is loose, misconnected, broken ormoisturized keep it dry...

  • Page 116: H5 Troubleshooting

    13.9.H5 Troubleshooting 13.9.1.Digital display output 13.9.2.Description Code Description Location Ta room temperature sensor error Inserted on PCB of User Interface 13.9.3.Procedure H5：Ta Temperature sensor error Replace User Interface 13.10.H8, P21, P27 Troubleshooting 13.10.1.Digital display output 13.10.2.Description Code Description Port Location(Main Control PCB) H-SEN High pressure sensor error L-SEN Low pressure sensor error CN46...

  • Page 117: Procedure

    13.10.3.Procedure H8, P21: Pressure sensor error Loose, misconnected, broken or wet temperature Reconnect the temperature sensor securely and sensor connection on Main Control PCB. ensure it remains dry Measure the resistance value of sensor, and it’s consistent with the curve(Refer to part 4 Appendix - Replace Main Control PCB Temperature Sensor Resistance Characteristics) Replace pressure sensor...

  • Page 118: E1 Troubleshooting

    13.11.E1 Troubleshooting 13.11.1.Digital display output 13.11.2.Description Error code E1 (For 3Ph units) Description Phase loss or phase reversal Triggering At least one of L1/L2/L3/N misconnected or disconnected Relative ports Terminal blocks and locations 13.11.3.Procedure E1: Phase loss or phase reversal Power off the unit, and check L1/L2/L3/N on terminal Make sure L1/L2/L3/N is well connected and the block, at least one of them was misconnected or...

  • Page 119: H7 Troubleshooting

    13.12.H7 Troubleshooting 13.12.1.Digital display output 13.12.2.Description Error code Description Power overvoltage and Power under-voltage protection Input voltage<170V or Input voltage≥265V (The unit operating normally if 250V≥input Triggering voltage≥180V) 13.12.3.Procedure H7: Power overvoltage and Power under- voltage protection H7 occurs when power off The system protection enabled, nothing need to deal H7 occurs when power on immediately after power with...

  • Page 120: P0 Troubleshooting

    13.13.P0 Troubleshooting 13.13.1.Digital display output 13.13.2.Description Error code Description Low pressure protection Main Control PCB detected that the low pressure <0.12MPa lasting more than 30 mins Main Control PCB detected that low pressure <0.13MPa & compressor shutting off more than 2 Triggering mins at the same time.

  • Page 121: Procedure

    13.13.3.Procedure P0: Low-pressure protection Check “Unit Status-Operation parameter- P1 comp. pressure & P2 comp. pressure” on the User Replace low-pressure sensor Interface and P1=P2 while the unit is off T4 sensor fell out from the fixed position or was Re-fix the T4 sensor to the installation position. contact with something in high temperature.

  • Page 122: P1 Troubleshooting

    13.14.P1 Troubleshooting 13.14.1.Digital display output 13.14.2.Description Error code Description High pressure switch protection Triggering The Main Control PCB detected that the high pressure was ≥ 3.5 Mpa High pressure switch location The location of high pressure switch refer to Part 2 Component Layout and Refrigerant Circuits High pressure switch plug Electric expansion valve Refer to Nameplate for rated refrigerant charge...

  • Page 123: Procedure

    13.14.3.Procedure P1 occurs in Cooling mode High-pressure switch plug from the inverter Reconnect high-pressure switch securely control box is loose or misconnected Use a digital multimeter to measure high- pressure switch Power off and power on again , P1 error still with buzzer.
  • Page 124 P1 occurs in Heating/DHW mode Check and clean pipe and filter, Ensure water pressure Check “Unit Status-Error info.” on the User and water-flow rate is in Proper range as above. Interface, and E8/E0/P5 code occurred at roughly For more details, refer to E8/E0/P5 troubleshooting the same time procedure.
  • Page 125 The proper water flow rate range The proper water pressure range:(0.3bar-3bar) P1 occurs in Off status Check “Unit Status-Operation parameter- P1 comp. pressure & P2 comp. pressure” on the User Interface, Request aftersales service and P1&P2<3.5MPa Check whether high-pressure switch plug was Re-connect the high-pressure witch plug disconnected, or misconnected Measure the high-pressure switch to check whether it...

  • Page 126: P3 Troubleshooting

    13.15.P3 Troubleshooting 13.15.1.Digital display output 13.15.2.Description Error code Description Overcurrent protection Triggering The Main Control PCB detected that the input current is higher than protection value Terminal block Refer to Nameplate for rated refrigerant charge volume. Nameplate The picture is for reference only. The actual product may vary.
  • Page 127 Check and clean pipe and filter, make sure water Check “Unit Status-Error info.” on the User pressure and water flow rate is in the proper range Interface, and E8/E0 code also occurred barely at For more details, refer to E8/E0 troubleshooting the same time procedure.
  • Page 128 P3 occurs in cooling mode Measure the input voltage of terminal block, and Adjust the power supply based on the rated it’s<198V voltage range Use a current clamp to measure the current between two power cables connected to “L” on terminal block, Replace the inverter control box compare it with “Unit Status-Operation parameter-ODU current”...
  • Page 129 Use a digital multimeter to measure the resistance between each two of compressor terminals. If the Replace the compressor resistance <10 Ohm or the resistance=0 (Short circuited), compressor failed Power off the unit, and identify possible inverter PCB failure. (Refer to part 4 Appendix: Guide for identifying Replace the inverter control box inverter PCB failure) Reboot the unit, and the error still occurs...

  • Page 130: P4 Troubleshooting

    13.16.P4 Troubleshooting 13.16.1.Digital display output 13.16.2.Description Error code Description Compressor protection against excessively-high discharge temperature Triggering The Main Control PCB detected that the compressor discharge temperature was ≥115℃ Tp discharge temp. sensor Relative ports and locations Tw_in Tw_out...

  • Page 131: Procedure

    13.16.3.Procedure Pull out Tp temperature sensor from compressure fixed sleeve, leave it in the air for 10 mins, if the temperature difference between sensor and air is greater than 5℃, the sensor failed. Replace Tp temperature sensor You can also measure the resistance and compare it with sensor’s resistance characteristics table (Refer to part 4 Appendix), If the resistance is not consistent, the sensor has failed.

  • Page 132: Pd Troubleshooting

    13.17.Pd Troubleshooting 13.17.1.Digital display output 13.17.2.Description Error code Description Protection for excessively-high condensing temperature in cooling mode Triggering Main Control PCB detected that the condensing temperature was ≥65℃ in cooling mode Relative ports and locations Refer to Nameplate for rated refrigerant charge volume.

  • Page 133: Procedure

    13.17.3.Procedure Pd: Protection for excessively-high condensing temperature in cooling mode Replace Main Control PCB or high- pressure Check “Unit Status-Operation parameter- P1 comp. sensor.（Refer to H8/P21 troubleshooting pressure & P2 comp. pressure” on the User Interface and P1=P2 while the unit is off procedure to determine which one’s failed）...

  • Page 134: Hp Troubleshooting

    13.18.HP Troubleshooting 13.18.1.Digital display output 13.18.2.Description Error code Description Low pressure protection in cooling mode Main Control PCB detected that the suction pressure P2<0.35Mpa for 5 seconds in cooling Triggering mode and compressor running over 300 seconds. Tw_in Tw_out...

  • Page 135: Procedure

    13.18.3.Procedure HP: Low-pressure protection in cooling mode Check whether Tw_out sensor felt out from installation Install the Tw_out sensor back to the installation port port so actual temperature can be detected. Pull out Tw_out/Tw_in sensor from plate heat exchanger, leave it in the air for 10 mins, if the temperature difference between sensor and air is greater than 5℃, the sensor failed.

  • Page 136: Ba Troubleshooting

    13.19.bA Troubleshooting 13.19.1.Digital display output 13.19.2.Description Error code Description T4 sensor out of operation range protection In heating/ DHW mode, the error occurs when T4≥65℃ or T4<-25℃ Triggering In cooling mode, the error occurs when T4≥65℃ or T4<-5℃ 13.19.3.Procedure bA: T4 sensor out of operation range protection The actual ambient temperature ≥65℃...

  • Page 137: Pp, Hb Troubleshooting

    13.20.PP, Hb Troubleshooting 13.20.1.Digital display output 13.20.2.Description Error code Protection for abnormal temperature difference Description PP occurs 3 times in heating/DHW mode between outlet water and inlet water Twout-Twin≥3℃ and lasts 15 mins in cooling PP occurs 3 times in heating/DHW mode; When mode Twout<7℃...

  • Page 138: Procedure

    13.20.3.Procedure PP in cooling mode Outlet pipe and inlet pipe connected reversely Re-connect the pipes securely Tw_in sensor and Tw_out sensor connected reversely Re-connect the sensors securely on plate heat exchanger or on Main control PCB Pull out Tw_out/Tw_in sensor from plate heat exchanger, leave it in the air for 10 mins, if the temperature difference between sensor and air is greater than 5℃, the sensor failed.
  • Page 139 PP/Hb in heating/DHW mode Outlet pipe and inlet pipe connected reversely Re-connect the pipes securely Tw_in sensor and Tw_out sensor connected reversely Re-connect the sensors securely on plate heat exchanger or on Main control PCB Pull out Tw_out/Tw_in sensor from plate heat exchanger, leave it in the air for 10 mins, if the temperature difference between sensor and air is greater than 5℃, the sensor failed.

  • Page 140: P5 Troubleshooting

    13.21.P5 Troubleshooting 13.21.1.Digital display output 13.21.2.Description Error code Description The big temperature difference between outlet water temp. and inlet water temp. Twout-Twin≥30℃ in heating/DHW mode Triggering Twout-Twin≥17℃ in cooling mode Tw_in Tw_out 13.21.3.Procedure P5：The big temperature difference between outlet water temp. and inlet water temp. Check and clean pipe and filter, Ensure water Check “Unit Status-Error info.”...
  • Page 141 You can also measure the resistance and compare it with sensor’s resistance characteristics table (Refer to part 4 Appendix), If the resistance is not consistent, the sensor has failed. Whether the heating water temperature rises rapidly, the cooling water temperature drops rapidly and the unit stops quickly.

  • Page 142: F75 Troubleshooting

    13.22.F75 Troubleshooting 13.22.1.Digital display output 13.22.2.Description Error code Description Protection for insufficient discharge overheating degree. Triggering Tp-Tc < 0℃ and last 10 mins Tp discharge temp. sensor Refer to Nameplate for rated refrigerant charge volume. Nameplate The picture is for reference only. The actual product may vary.

  • Page 143: Procedure

    13.22.3.Procedure F75：Protection for insufficient discharge overheating degree Check “Unit Status-Operation parameter-P1 comp. pressure & P2 comp. pressure” on the User Interface, Compare it with the reference value in Discharge / There’s excess refrigerant charged. Recharge the Suction pressure and temperature range in unit with rated charge volume on Nameplate.

  • Page 144: F1 Troubleshooting

    13.23.F1 Troubleshooting 13.23.1.Digital display output 13.23.2.Description Error code Description Protection for DC bus undervoltage Triggering For single phase inverter PCB, the DC bus voltage≤200VDC BUS voltage(P-N) (Inverter PCB) 13.23.3.Procedure F1: Protection for DC bus undervoltage Power off the unit, and identify whether inverter PCB Replace the inverter control box failed.

  • Page 145: C7 Troubleshooting

    13.24.C7 Troubleshooting 13.24.1.Digital display output 13.24.2.Description Error code Description Over-high temperature protection for IPM module Triggering IPM module temperature ≥ 95℃ 13.24.3.Procedure C7：Over-high temperature protection for IPM module The unit was installed in a site that is narrow, with bad Place the unit somewhere broad, with good ventilation, or in a high temperature.

  • Page 146: H4, L** Troubleshooting

    13.25.H4, L** Troubleshooting 13.25.1.Digital display output 13.25.2.Description Error code Description Note 3 times of “L1*” in 60 mins Check the specific code on digital display panel on the Inverter module protection Main Control PCB...
  • Page 147 The specific L** code table: Error code Description Note Hardware overcurrent protection Phase current instantaneous overcurrent protection Phase current continuous 30s overcurrent protection Over-temperature protection Bus voltage too low error Bus voltage too high error Bus voltage excessively high error Phase loss error of three-phase power supply For 3Ph units Abnormal phase current sampling bias...

  • Page 148: Procedure

    13.25.3.Procedure H4, L**: Inverter module protection Power off the unit, the compressor connection cables Reconnect the cables correctly was disconnected, or misconnected Use a digital multimeter to measure the resistance between each two of compressor terminals. If the Replace the compressor resistance <10 Ohm, compressor failed Power off the unit, and identify whether inverter PCB failed.

  • Page 149: H6, Hh, J** Troubleshooting

    13.26.H6, HH, J** Troubleshooting 13.26.1.Digital display output 13.26.2.Description Error code Description Note Fan failure 10 times of H6 in 120mins Check the specific code on digital display panel on the Fan module failure Main Control PCB The specific J** code table: Error code Description Hardware overcurrent protection...

  • Page 150: Procedure

    13.26.3.Procedure H6, HH: Fan failure Power off the unit, the fan connection cables was Reconnect the cables correctly disconnected, or misconnected Use a digital multimeter to measure the resistance between each two of fan terminals. If the resistance Replace the fan <10 Ohm, fan motor failed Power off the unit, and identify whether inverter PCB failed.

  • Page 151: Hf Troubleshooting

    13.27.HF Troubleshooting 13.27.1.Digital display output 13.27.2.Description Error code Description Outdoor unit EEPROM error Triggering The driving program of inverter PCB is detected as being mismatched with Dip switch Relative ports and Dip switch S5 S6 locations 0/0/0/0 0/0/0/1-4kW、0/0/1/0-6kW、0/0/1/1-8kW、0/1/0/0-10kW、0/1/0/1-12kW、 Correct Dip switch (4-16kW 1Ph) 0/1/1/0-14kW、0/1/1/1-16kW 1/1/0/1-12kW、1/1/1/0-14kW、1/1/1/1-10kW、...

  • Page 152: Pb Troubleshooting

    13.28.Pb Troubleshooting 13.28.1.Digital display output 13.28.2.Description Error code Description Pb is the indicator that shows the system is running in anti-freezing control Triggering Refer to Part 3 - Protection control – Anti-freezing protection control User Interface It shows anti-freezing icon on the User Interface...

  • Page 153: C2 Troubleshooting

    13.29.C2 Troubleshooting 13.29.1.Digital display output 13.29.2.Description Error code Description Relay adhesion on IBH PCB Relay: Poor contact, relay deformation, relay aging, etc. Triggering External factors : overcurrent, over high ambient temperature, etc. Relays and pins of a relay Relative ports and locations User interface -For Serviceman- C2...

  • Page 154: C3, C4 Troubleshooting

    13.30.C3, C4 Troubleshooting 13.30.1.Digital display output 13.30.2.Description Error code Current transformer failure or circuit failure Description C3≥3 times of IBH PCB Incorrect Dip switch S1, cables with IBH connected improperly; Triggering Overvoltage, IBH failure etc. Correct Dip switch S1 IBH PCB LED light Temperature controller Power transformer And “TRANS OUT”...

  • Page 155: Procedure

    13.30.3.Procedure C3,C4 Confirm the Dip Switch S1 on main control PCB, and Correct Dip switch S1 it’s correct. The cables between IBH PCB(CN52) and Main Control PCB(CN9), the cables of tube heater is connected Reconnect the cables correctly properly Use a digital diameter to measure the power input on the terminal block 1Ph: L-N＞176V；...

  • Page 156: Discharge / Suction Pressure And Temperature Range

    14.DISCHARGE / SUCTION PRESSURE AND TEMPERATURE RANGE The following parameter ranges are used to roughly determine whether the system is running properly: Discharge temperature(Tp) on heating/DHW mode T4＜-10℃ Twout+10＜Tp＜Twout+30 -10℃≤T4＜10℃ Twout+10＜Tp＜Twout+30 10℃≤T4＜25℃ Twout+10＜Tp＜Twout+25 T4≥25℃ Twout+10＜Tp＜Twout+25 Note: T4: ambient temperature Tw_out: leaving water temperature. Discharge temperature(Tp) on cooling mode Tp (℃) Fx＜44Hz...

  • Page 157: Appendix

    15.APPENDIX 15.1.Temperature Sensor Resistance Characteristics Applied to T3 Outdoor unit heat exchanger bottom temperature sensor T4 Ambient temperature sensor Th Return-air temperature sensor T2 Plate heat exchanger outlet refrigerant temperature sensor T2B Plate heat exchanger inlet refrigerant temperature sensor TL Outdoor unit heat exchanger outlet temperature sensor R25=10KΩ±3%，B25/50=4100K±3% Resistance (kΩ)
  • Page 158 Resistance (kΩ) Resistance (kΩ) Temp. (°C) Temp. (°C) Rmax Normal Rmin Rmax Normal Rmin （ ） （ ） 10.8 10.473 10.147 2.004 1.883 1.766 10.3 1.934 1.816 1.702 9.848 9.551 9.255 1.867 1.752 1.641 9.418 9.125 8.834 1.802 1.69 1.582 9.01 8.721 8.434...
  • Page 159 Applied to Tp Discharge temperature sensor R90℃=5KΩ±3%，B25/50=3950K±3% Resistance (kΩ) Resistance (kΩ) Temp. (°C) Temp. (°C) Rmax Rmin Rmax Rmin Normal Normal （ ） （ ） 2002.628 1642.059 1281.49 318.604 271.634 224.664 1881.964 1544.968 1207.972 302.08 257.867 213.653 1769.292 1454.213 1139.134 286.483 244.857 203.232...
  • Page 160 Temp. (°C) Resistance (kΩ) Temp. (°C) Resistance (kΩ) Rmax Rmin Rmax Rmin Normal Normal （ ） （ ） 65.58 58.228 50.877 11.858 11.134 10.411 62.678 55.724 48.77 11.432 10.749 10.066 59.919 53.34 46.762 11.024 10.38 9.735 57.295 51.071 44.847 10.632 10.024 9.416 54.8...
  • Page 161 Resistance (kΩ) Resistance (kΩ) Temp. (°C) Temp. (°C) Rmax Rmin Rmax Rmin Normal Normal （ ） （ ） 3.045 2.901 2.758 1.625 1.511 1.397 2.962 2.819 2.676 1.586 1.473 1.36 2.881 2.739 2.597 1.548 1.436 1.324 2.802 2.662 2.521 1.511 1.401 1.29 2.727...
  • Page 162 Applied to TW_in Plate heat exchanger inlet water temperature sensor TW_out Plate heat exchanger outlet water temperature sensor T5 Water tank temperature sensor TW2 Zone 2 water flow temperature sensor R50=17.6KΩ±3%，B0/100=3970K±2% Resistance (kΩ) Resistance (kΩ) Temp. (°C) Temp. (°C) Rmax Rmin Rmax Rmin...
  • Page 163 Resistance (kΩ) Resistance (kΩ) Temp. (°C) Temp. (°C) Rmax Rmin Rmax Rmin Normal Normal （ ） （ ） 53.854 51.165 48.476 10.231 9.818 9.405 51.485 48.959 46.432 9.887 9.481 9.075 49.234 46.86 44.486 9.556 9.157 8.758 47.094 44.863 42.632 9.237 8.846 8.454 45.058...
  • Page 164 Resistance (kΩ) Resistance (kΩ) Temp. (°C) Temp. (°C) Rmax Rmin Rmax Rmin Normal Normal （ ） （ ） 2.787 2.606 2.425 1.477 1.364 1.251 2.711 2.533 2.356 1.44 1.329 1.219 2.637 2.463 2.288 1.405 1.296 1.187 2.565 2.394 2.224 1.37 1.264 1.157 2.496...

  • Page 165: Pressure And Output Voltage Characteristics Of Pressure Sensor

    15.2.Pressure and Output voltage characteristics of Pressure sensor Output voltage formula of high pressure sensor：Vout(H)=0.87×P +0.5 Output voltage formula of low pressure sensor：Vout(L)=2×P +0.5 Measure the output voltage of pressure sensor...

  • Page 166: Guide For Identifying Inverter Pcb Failure

    15.3.Guide for identifying inverter PCB failure Before measuring the inverter PCB, please confirm steps below in advance : Cut off the power supply ; • Wait for 10 mins for capacitor discharging in order to avoid the electric shock • Remove all connections wires •...
  • Page 167 Inverter circuit (Fan module/ Compressor module): Test point Order Normal Abnormal Black +(Red) （ ） 0.3-0.7V 0 /infinite Note: If any one of test value abnormal, the inverter PCB failed. Request aftersales service and replace the inverter control box. 4-10KW 1Ph 12-16kW 3Ph 12-16kW Three phase bridge rectifiler:...
  • Page 170 GROUPE AIRWELL 10 RUE DU FORT DE SAINT CYR 78180 MONTIGNY LE BRETONNEUX FRANCE www.airwell.com 24.AW.WELLEA.HT.SM.R290.EN.25.06...

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