Kaysun Aquantia KHP-MO HT HP Service Manual
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Kaysun Aquantia KHP-MO HT HP Service Manual

Kaysun Aquantia KHP-MO HT HP Service Manual

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KHP-MO 26 DTP
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Summary of Contents for Kaysun Aquantia KHP-MO HT HP

  • Page 1 Service Manual Aquantia KHP-MO HT HP KHP-MO 26 DTP KHP-MO 35 DTP KHP-MO 40 DTP KHP-MO 30 DTP...
  • Page 3 KHP-MO HT HP CONTENTS Part 1 General Information ................3 Part 2 Component Layout and Refrigerant Circuits ........5 Part 3 Control and Field Settings ............... 13 Part 4 Diagnosis and Troubleshooting ............61 R290 Service Notice ................... 155...
  • Page 4 KHP-MO HT HP...
  • Page 5 KHP-MO HT HP Part 1 General Information 1 Product Lineup ..................4...

  • Page 6: Product Lineup

    KHP-MO HT HP 1 Product Lineup 380-415 V / 3 N / 50 Hz Power Supply Model KHP-MO 40 DTP KHP-MO 35 DTP KHP-MO 30 DTP KHP-MO 26 DTP Appearance Note: Please note that photos are for reference, products may vary.

  • Page 7: Refrigerant Circuits

    KHP-MO HT HP Part 2 Component Layout and Refrigerant Circuits 1 Layout of Functional Components .............. 6 2 Piping Diagrams ..................8...
  • Page 8 KHP-MO HT HP 1 Layout of Functional Components Inverter control box Axial flow fan&DC mator Main control box Accumulator tank Pipeline Unit Hydraulic component outdoor unit...
  • Page 9 KHP-MO HT HP E lectronic expansion valve E lectronic expansion valve E lectronic expansion valve E lectronic expansion valve Pressure Sensor Pressure Sensor Pressure Sensor Pressure Sensor Pressure controller Pressure controller Pressure controller Pressure controller E lectronic expansion valve E lectronic expansion valve E lectronic expansion valve E lectronic expansion valve Pressure Sensor...

  • Page 10: Piping Diagrams

    KHP-MO HT HP 2 Piping Diagrams Refrigerant piping graphic example: High-temperature, high-pressure gas High-temperature, high-pressure liquid Low-temperature, low-pressure gas liquid mixture Low-temperature, low-pressure gas Medium-temperature, medium-pressure gas Note: Direction of refrigerant flow depicted in diagram represents main refrigerant flow and is for illustration purposes only. 2.1 Heating mode (EVI off) out l et i nl et...
  • Page 11 KHP-MO HT HP 2.3 Heating mode (EVI on) out l et i nl et 2.4 Cooling mode (EVI on) out l et i nl et...

  • Page 12: Key Components

    KHP-MO HT HP 2.5 Key components Legend Symbol Description COMP DC inverter compressor HEAT3 Crankcase heater Discharge temperature sensor High-pressure switch High-pressure sensor 4-way valve Pin valve (discharge side) FAN A / B DC fan A / DC fan B Finned tube Heat exchanger Ambient temperature sensor Outdoor unit heat exchanger bottom temperature sensor...
  • Page 13 4-way valve To better control refrigerant flow, Aquantia KHP-MO HT HP series features an upgraded 4-way valve default position which remains closed in heating mode (no electrical signal) and open in cooling mode. When closed, the air-side heat exchanger functions as an evaporator and water side heat exchanger functions as a condenser;...
  • Page 14 KHP-MO HT HP...

  • Page 15: Table Of Contents

    KHP-MO HT HP Part 3 Control and Field settings 1 Shut-off Operation ................... 15 2 Standby Control ..................15 3 Startup Control ..................16 4 Normal Operation Control ................ 19 5 System protection features ..............21 6 Other Controls ..................26 7 User Interface Field Settings ..............
  • Page 16 KHP-MO HT HP Notice § Refer to system diagram below for location of key components and sensors. § The diagram below is for reference only. Actual installations will vary based on unique system configurations.

  • Page 17: Shut-Off Operation

    KHP-MO HT HP 1 Shut-off Operation The unit will automatically shut off if one of the following occurs: l System abnormality: to protect the compressor, a thermal sensor will automatically shut the system off if it detects any abnormality that could potentially cause damage. An error code will show on both the outdoor unit PCB digital display and the user interface.

  • Page 18: Startup Control

    KHP-MO HT HP 3 Startup Control 3.1 Compressor Startup Delay Control Startup control and restart control delay compressor startup by three minutes from the last stoppage in order to prevent the potentially harmful effects of frequent compressor on/off cycling and also ensures that pressure within the refrigerant system remains equalized.
  • Page 19 KHP-MO HT HP Component control during startup in cooling mode Component Wiring diagram label 26-40 kW Control functions and status Compressor startup program selected according to Inverter compressor COMP ● ambient temperature DC fan motor Fan run at maximum speed ●...
  • Page 20 KHP-MO HT HP Heating start mode 3 Compressor startup program when heating mode ambient temperature is below -20°C and discharge temperature is below 5°C H eat i ng / D H W C om pressor P reset runni ng C om pressor m ode det ect ed st art -up m ode 2 com pl et e...

  • Page 21: Normal Operation Control

    KHP-MO HT HP 4 Normal Operation Control 4.1 Component Control during Normal Operation Component control during heating and domestic hot water (DHW) operations Component Wiring diagram label Control functions and status 26-40 kW Controlled according to load requirement determined by Inverter compressor COMP ●...

  • Page 22: Electronic Expansion Valve Control

    KHP-MO HT HP 4.5 Electronic Expansion Valve Control Heating / Cooling electronic expansion valve (EEV1/EEV2) The electronic expansion valve (EEV) is controlled in increments from 0 (fully closed) to 480 (fully open). § At power-on: Ÿ The EEV first closes fully, then moves to the standby at the 480 increments position. After the compressor activates, the EEV control is determined by suction superheat discharge temperature, pressure, discharge temperature and compressor speed.

  • Page 23: System Protection Features

    KHP-MO HT HP 5 System protection features 5.1 High Pressure Protection This feature protects the refrigerant system from abnormally high pressure and also protects the compressor from transient spikes in pressure. Normal operation > 3.5MPa < 2.6MPa High pressure protection, error code P1 is displayed Notes: 1.

  • Page 24: Discharge Temperature Protection

    KHP-MO HT HP 5.3 Discharge Temperature Protection 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 the error code P4 and the unit shuts down.

  • Page 25: Voltage Protection

    KHP-MO HT HP 5.5 Voltage Protection This protects the M-Thermal Split from abnormally high or abnormally low voltages. Normal operation Voltage ≥ 265V 180V≤Voltage < 256V for 30s or Voltage ≤ 172V Compressor voltage protection, error code H7 is displayed When the phase voltage of AC power supply is at or above 265V, the system displays the error code H7 and the unit shuts down.
  • Page 26 KHP-MO HT HP Anti-freezing control in Cooling mode Cooling mode Min(Twout,Twin,T1)<4， and lasts 5s Compressor stops, water pump keeps running at the maximum output for 5 mins Min(Twout,Twin,T1)ｋ8， 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...
  • Page 27 KHP-MO HT HP Anti-freezing control in Off status/ Heating mode/ DHW mode Off Status / Heating mode / DHW mode Turn to Off Status 1.T4<3℃!and Min(Twout,Twin,T1)<4℃ lasts 5s 2.Min(Twout,Twin,T1)<2℃ Compressor stops, water pump keeps running at the maximum output for 5 mins Min(Twout,Twin,T1)<8℃...

  • Page 28: Other Controls

    KHP-MO HT HP 6 Other Controls 6.1 Defrosting Function In order to recover heating capacity, defrosting occurs when air-side heat exchanger of the outdoor unit acts as a condenser. Defrosting is automatically controlled based on the outdoor ambient temperature, the outlet temperature of the air-side heat exchanger refrigerant and the compressor run time.

  • Page 29: User Interface Field Settings

    KHP-MO HT HP 7 User Interface Field Settings 7.1 Introduction During installation, the installer determines settings based on configuration parameters, climate conditions and end-user preferences. The relevant settings are accessible and programmable through the FOR SERVICEMAN menu on the user interface.

  • Page 30: Menu Structure

    KHP-MO HT HP 7.2 Menu Structure Functions may be disabled or unavailable and will not appear on the menu.
  • Page 31 KHP-MO HT HP 7.3 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 32: Setting Description

    KHP-MO HT HP 7.3.1 DHW heating setting 7.3.1.1 DHW mode DHW mode is for configuring an installed DHW tank. 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 others DHW setting, all other settings in DHW setting will be invisible.
  • Page 33 KHP-MO HT HP 7.3.1.3 DHW priority, DHW priority time set, t_DHWHP_RESTRICT, t_DHWHP_MAX DHW priority defines whether domestic hot water or space heating/cooling is given 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 34: Heating/Cooling Mode

    KHP-MO HT HP Heating/Cooling turns to DHW turns to PRIORITY PRIORITY t_DHWHP_RESTRICT t_DHWHP_MAX Heating/Cooling TIME SET && DHW mode ON || DHW mode OFF && T5<MIN(T5S, T5STOP)- T5≥MIN(T5S, dT5_ON T5STOP) A min B min && Heating/Cooling mode mode operates for A mins operates for B mins &&...
  • Page 35 KHP-MO HT HP PUMP_D RUNNING TIME defines the period that DHW pump operates for each timer. The diagram below illustrates the effects of PUMP_D RUNNING TIME when Pump_D is installed and PUMP_D TIMER is enable. Status PUMP_D RUNNING TIME Time PUMP_D DISINFECT defines whether DHW pump operation is activated in disinfection mode.
  • Page 36 KHP-MO HT HP 7.3.1.7 T4DHWMAX, T4DHWMIN T4DHWMAX defines the ambient temperature above which heat pump and AHS/IBH may have different actions. When T4DHWMAX≤T4 and T4DHWMAX<43℃, both compressor and AHS/IBH stop running. When T4HMAX≤T4 and T4DHWMAX=43℃, compressor runs with lowest frequency and AHS/IBH runs according to user demand.
  • Page 37 KHP-MO HT HP The diagram below illustrates the effects of T4CMAX and T4CMIN. Heat pump ON with lowest Heat pump ON compressor frequency T4CMIN T4CMAX Abbreviations: T4: Outdoor ambient temperature 7.3.2.4 dT1SC dT1SC defines water temperature hysteresis of activating heat pump. When T1 –...
  • Page 38 KHP-MO HT HP 7.3.3 Heating setting 7.3.3.1 Heating mode Heating mode is for configuring heating operation. 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, all other settings in Heating mode will be invisible.
  • Page 39 KHP-MO HT HP 7.3.3.4 dT1SH dT1SH defines water temperature hysteresis of activating heat pump. When T1≤T1S - dT1SH and heat pump is within operating ambient temperature range, heat pump provides hot water to the space heating terminals. 7.3.3.5 dTSH dTSH defines room temperature hysteresis of stopping heat pump. dTSH is only applicable if YES is selected for Room temp. in the Temp.
  • Page 40 KHP-MO HT HP 7.3.4 Auto mode setting 7.3.4.1 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 41 KHP-MO HT HP 7.3.5.2 Room temp. Room temp. defines whether heat pump is controlled by room temperature detected by the temperature sensor inside the wired controller. Setting Description Heat pump is controlled by room temperature no matter what is the setting of 7.3.5.1 Water flow temp. In this case, the target water flow temperature will be calculated from climate curves.
  • Page 42 KHP-MO HT HP 7.3.6 Room thermostat setting Room thermostat can be an alternate heat pump control solution. Setting Description Wired controller is used to • • Control heat pump ON/OFF • • Without room thermostats (means Temp. type setting is Define water temperature •...
  • Page 43 KHP-MO HT HP 7.3.7 Other Heat Source Menu 7.3.7.1 IBH FUNCTION, 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 dT1_IBH_ON defines water temperature hysteresis of activating electric heater. When T1S - T1 ≥ dT1_IBH_ON the backup electric heater is on.
  • Page 44 KHP-MO HT HP 7.3.7.2 AHS FUNCTION, AHS_PUMP_I CONTROL, dT1_AHS_ON, t_AHS_DELAY, T4_AHS_ON AHS FUNCTION defines auxiliary heat source function. Setting Description Without Auxiliary heat source Heating Auxiliary heat source is used for heating mode Heating and DHW Auxiliary heat source is used for heating mode and DHW mode AHS_PUMP_I CONTROL select the Pump_I operating status when only auxiliary heat source runs.
  • Page 45 KHP-MO HT HP 7.3.7.4 MAX_SETHEATER, MIN_SETHEATER, MAX_SIGHEATER, MIN_SIGHEATER When “AHS1” port and “AHS2” port of main control PCB are connected with auxiliary heat source “ON/OFF” signal, auxiliary heat source leaving water temperature automatically change as voltage changes. MAX_SETHEATER sets the maximum water temperature of auxiliary heat source. MIN_SETHEATER sets the minimum water temperature of auxiliary heat source.
  • Page 46 KHP-MO HT HP Diagram below illustrates the operation of heat pump and tank booster heater of DHW mode. Water temperature Status Min(T5S + dT5_TBH_OFF, 70 ℃ ) T5stop Min(T5S, T5stop) - dT5_ON Compressor Time t_TBH_DELAY Abbreviations: T5S: DHW set temperature T5stop: DHW mode leaving water temperature operating limit TBH: Immersion heater 7.3.7.6 Solar function, Solar control, Deltasol...
  • Page 47 KHP-MO HT HP 7.3.9 Restore factory settings Restore factory settings is used to restore all the parameters (including energy metering data and WLAN setting) set in the user interface to factory defaults. On selecting YES, the process of restoring all settings to factory defaults begins and progress is displayed as a percentage. 7.3.10 Test run Test run is used to do the point check and check that air purge function, circulation pump, cooling mode, heating mode and DHW mode are all operating correctly.
  • Page 48 KHP-MO HT HP 7.3.10.1 Point check The POINT CHECK menu is used to check the operation of indiviDouble components. Use to scroll to the components you want to check and press to toggle the on/off state of the component. If a valve does not turn on/off or a pump/heater does not operate when their on/off state is toggled, please check the connection between component and main PCB and make sure components’...
  • Page 49 KHP-MO HT HP 7.3.10.3 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. 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.
  • Page 50 KHP-MO HT HP 7.3.10.6 DHW running The DHW running operation is used to check the operation of the system in DHW mode. During DHW running operation, 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.
  • Page 51 KHP-MO HT HP 7.3.11.1 Preheating for floor Preheating for floor function provides mild heat to the underfloor water piping for the first time during seasonal heating, diminish the risk of damage to the floor and piping system. Setting Description Disables preheating for floor function Enables preheating for floor function T1S defines heat pump leaving water temperature in preheating T_ARSTH defines running time for first preheating of the floor...
  • Page 52 KHP-MO HT HP 7.3.11.2 Floor drying up For newly-installed under-floor heating systems, floor drying up is necessary to remove moisture from the flooring and subfloor to prevent warping or rupture. The heat pump provides mild heat to the concrete or other structural material around the underfloor water piping for a certain period of time to accelerate the process of getting rid of moisture.
  • Page 53 KHP-MO HT HP 7.3.12 Auto restart Auto restart sets whether or not the unit re-applies the mode and unit status settings when the power returns following a power failure. If 7.3.6 Room thermostat setting is defined as not 0, Auto restart function will not be applicable. Auto restart cooling/heating mode Setting Description Disables auto restart cooling/heating mode...
  • Page 54 KHP-MO HT HP 7.3.14 Input definition INPUT DEFINE defines sensor and function preferences during installation. M1 M2 defines the function of M1M2 port Setting Description Remote ON/OFF Remote ON/OFF control of heat pump TBH ON/OFF Remote ON/OFF control of tank booster heater AHS ON/OFF Remote ON/OFF control of auxiliary heat source Smart grid defines whether SMART GRID control signal is connected to hydronic PCB.
  • Page 55 KHP-MO HT HP 7.3.15 Cascade setting PER_START sets the start-up percentage of multiple units for the first time start-up after power on. For example: Total units PER_START Starting units TIME_ADJUST sets the judgment period of adding and subtracting units 7.3.16 HMI address setting HMI ADDRESS FOR BMS sets the HMI address code for BMS (only valid for master controller) STOP BIT sets upper computer stop bit(1: STOP BIT1;...
  • Page 56 KHP-MO HT HP 7.3.17.2 t1_ANTILOCK PUMP, t2_ANTILOCK PUMP RUN, t1_ANTILOCK SV, t2_ANTILOCK SV RUN Antilock operation prevent components from sticking to result in system fail. t1_ANTILOCK PUMP defines the interval time that Pump_I, Pump_O and Pump_C runs in order to antilock t2_ANTILOCK PUMP RUN defines the running time for Pump_I, Pump_O and Pump_C antilock operation t1_ANTILOCK SV defines the interval time that SV1, SV2 and SV3 valve works in order to antilock t2_ANTILOCK SV RUN defines the running time for SV1, SV2 and SV3 valve antilock operation...
  • Page 57 KHP-MO HT HP 7.3.18 Clear energy data Once selecting YES, All energy metering data is clear. 7.3.19 Intelligent function settings 7.3.19.1 Energy correction The actual installation scenario would be different from one to another. The energy metering calculation of the unit could deviate slightly due to the actual installation.
  • Page 58 KHP-MO HT HP 7.3.19.2 Sensor backup setting Sensor backup setting defines whether the sensor backup function is active or not. Setting Description Disable Sensor backup setting function Enable Sensor backup setting function When Sensor backup setting function is activated, a bubble with text jumps out in the home page, in which the timer indicates for how long the unit can run normally before it shuts down.

  • Page 59: Operation Parameter

    KHP-MO HT HP 7.4 Operation parameter Operation parameter is for reviewing the operation parameters. The interface below is for reference and different units’ state correspond to different parameter values. Operation for entering Operation parameter ： Step 1: Home page Step 2: Press “ ” Step 3: Select “Unit status”...

  • Page 60: Over-The-Air

    KHP-MO HT HP 7.5 OTA ( Over-The-Air ) guideline HIM software version is above V1.0.0.95 If your wire controller is not connected to the mobile APP, you need to connect to Internet. (Set personal hotspot with smart phone, hotspot name as: SMARTOTA Password: ota12345. And place the smart phone near the wired controller) If your wire controller is already connected to the mobile APP, you can follow the following procedure directly.

  • Page 61: Usb Function Field Settings

    KHP-MO HT HP 8 USB Function Field Settings USB function helps you easily transmit parameters and program. When USB device is connected 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:...
  • Page 62 KHP-MO HT HP Sub-function 3: Please make sure there is only one applicable hydraulic system program on the USB device 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. Press to choose the item and press to confirm your choice.

  • Page 63: Troubleshooting

    KHP-MO HT HP Part 4 Diagnosis and Troubleshooting 1 Service Information ................. 62 2 Electric wiring diagram ................70 3 Electric Control Box Layout ..............71 4 Outdoor Unit PCBs ................... 72 5 Error Code Table ..................82 6 Troubleshooting ..................85 7 Discharge / Suction pressure and temperature range ......

  • Page 64: Service Information

    KHP-MO HT HP 1 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 A3 may only be carried out by authorized heating contractors.
  • Page 65 KHP-MO HT HP substance that may corrode refrigerant-containing components, unless the components are constructed of materials that are inherently resistant to corrosion or are suitably protected from corrosion 1.4 Check of Electrical Devices Repair and maintenance of electrical components should include initial safety checks and component inspection procedures. If a fault exists and could compromise safety, no electrical supply should be connected to the circuit until it is satisfactorily dealt with.
  • Page 66 KHP-MO HT HP This unit uses hydrofluorocarbon that can only be disposed of by qualified specialists Packaging Dispose of the packaging properly. Observe all relevant regulations Refrigerant Removal, Evacuation, Charge, Recovery, and Unit Decommissioning WARNING ！ Due to the feature of the R290 refrigerant, only carry out work when you have specific expert refrigeration knowledge and are competent for handling R290 refrigerant.
  • Page 67 KHP-MO HT HP work properly. Hoses should be complete with leak-free disconnection couplings and in good conditions. Before 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.
  • Page 68 KHP-MO HT HP 1.9 R290 System Service When repairing systems that use R290 refrigerant, the following warnings and operating requirements should be noted. 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.
  • Page 69 KHP-MO HT HP – If an indirect refrigerating circuit is being used, the secondary circuit shall be checked for the presence of refrigerant; – Marking to the equipment continues to be visible and legible. Markings and signs that are illegible shall be corrected; –...
  • Page 70 KHP-MO HT HP The refrigerant charge shall be recovered into the correct recovery cylinders. The system shall be “flushed” with OFN to render the unit safe. This process may need to be repeated several times. Compressed air or oxygen shall not be used for this task.
  • Page 71 KHP-MO HT HP available and in good working order. Hoses shall be complete with leak-free disconnect couplings and in good condition. Before using the recovery machine, check that it is in satisfactory working order, has been properly maintained and that any associated electrical components are sealed to prevent ignition in the event of a refrigerant release.

  • Page 72: Electric Wiring Diagram

    KHP-MO HT HP 2 Electric wiring diagram...

  • Page 73: Electric Control Box Layout

    KHP-MO HT HP 3 Electric Control Box Layout Low voltage box Main Control PCB Power supply terminals Wire clip Reserve strong current control port Communication terminals block High voltage box Filter PCB Reactor Fan inverter PCB Fuse PCB Compressor & fan inverter PCB...

  • Page 74: Outdoor Unit Pcbs

    KHP-MO HT HP 4 Outdoor Unit PCBs 4.1 Main Control PCB...
  • Page 75 KHP-MO HT HP Label Code Port Content Rated Voltage CN34 Port for T3 temp. sensor DC 3.3 V CN45 Port for T4 temp. sensor DC 3.3 V Port for TL temp. sensor DC 3.3 V Port for Th temp. sensor DC 3.3 V CN50 Port for Tp temp.
  • Page 76 KHP-MO HT HP CN42 HEAT6 Port for anti-freeze electric heating tape AC 230 V CN29 HEAT5 Port for anti-freeze electric heating tape AC 230 V CN41 HEAT1 Reserved AC 230 V CN40 OUT1 Reserved AC 230 V CN62 HEAT3 Port for anti-freeze electric heating tape DC 12 V CN71 Port for four-way valve...
  • Page 77 KHP-MO HT HP 4.2 Compressor & fan inverter PCB...
  • Page 78 KHP-MO HT HP Label Code Port Content Voltage CN38 DC fan power output port DC 565 V CN26 19V GND Fan module board power supply port DC 19 V Port output for fan Phase to phase voltage AC 46-460 V O-Motor PTC relay control port/communication port DC 12 V / DC 5 V...
  • Page 79 KHP-MO HT HP 4.3 Fan inverter PCB Label Code Port Content Voltage Port for power supply DC 565 V Fan module communication port DC 5 V Fan module communication port DC 5 V EEPROM programming port DC 5 V Port for fan inverter PCB power supply DC 19 V DEBUG Programming port...
  • Page 80 KHP-MO HT HP 4.4 Filter PCB Label Code Port Content Voltage Power input L1 Power input L2 AC 380-415 V Power input L3 Reserved CN15 L1L2L3 Reserved AC 380-415 V CN11 N A B C Reserved AC 380-415 V L3’ Output power L3' Output power L2' AC 380-415 V...
  • Page 81 KHP-MO HT HP 4.5 Fuse PCB Label Code Port Content Voltage CN12 Fuse 1-1 AC 230 V CN15 Input power L3' AC 230 V CN11 Fuse 2-1 AC 230 V CN14 Input power L2' AC 230 V CN13 Input power L1' AC 230 V CN10 Fuse 3-1...
  • Page 82 KHP-MO HT HP 4.6 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 4.7 Cascade setting and Modbus function The DIP switch S3 on Main Control PCB is used for setting the Modbus address.
  • Page 83 KHP-MO HT HP 4.8 DIP Switch Settings DIP switch S1, S2, S3, S4, S5 and S6 are located on the main control PCB Keep factory Settings. 4.9 Point check button Point check button SW1 and SW2 are located on the main control PCB. Point check button is for the use of research and development personnel and should not be touched under normal circumstances.

  • Page 84: Error Code Table

    KHP-MO HT HP 5 Error Code Table 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 Control PCB...
  • Page 85 KHP-MO HT HP 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 Lack of L2 phase fault. User Interface and Main Control PCB Protection code Error code...
  • Page 86 KHP-MO HT HP Fan 2 failure User Interface and Main Control PCB 10 times of H6 / H61 in 120min User Interface and Main Control PCB Hardware overcurrent protection Main Control PCB Phase current instantaneous overcurrent protection Main Control PCB Phase current continuous 30s overcurrent protection Main Control PCB Over-temperature protection...

  • Page 87: Troubleshooting

    KHP-MO HT HP 6 Troubleshooting 6.1 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).
  • Page 88 KHP-MO HT HP 6.2 E0, E8 Troubleshooting Digital display output 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 Triggering on or water flow switch breaks after 10 times of E8 in a row when do running- pump on within 10 times water detection after pump on...
  • Page 89 KHP-MO HT HP Layout of main component Code Code Code Code Automatic air purge valve Flow switch Backup heater Pump Expansion vessel Plate heat exchanger Refrigerant gas pipe Water outlet pipe Temperature sensor Pressure relief valve Refrigerant liquid pipe Water inlet pipe E0 (** %) / E8 (** %) is displayed on the User Interface.
  • Page 90 KHP-MO HT HP Procedure E0 / E8: Water flow failure Turn off other pump that out of the unit No water flow before the pump starts before the pump starts within the unit. Check the error code E0(**%) /E8(**%) displayed on the User Interface, and the Check the details of Note 1 percentage is between 5%-80% Check the water pump indicator lights, and it...
  • Page 91 KHP-MO HT HP Note 1: The meaning of percentage of water pump output(displayed on the user interface) Percentage Water pump model Brand Description Pump works normally, feedbacks 0-4.0m³/h flow 0-70% APF25-12-130E FPWM1 SHIMGE information (Q=0.057PWMout, Q: m /h, PWMout: %) Alarm（Undervoltage＜160V or Phase loss or APF25-12-130E FPWM1 SHIMGE...
  • Page 92 KHP-MO HT HP Note 3: The possible error and solutions of water pump water pump failure The possible causes of 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 93 KHP-MO HT HP 6.3 E2 Troubleshooting Digital display output Description Error code Description Communication fault between User Interface and Main Control PCB Main Control PCB side: Communication failure with User Interface lasts 2 min Triggering User Interface side: No communication reply from Main Control PCB for 1 min Relative ports and X/HA、Y/HB...
  • Page 94 KHP-MO HT HP Procedure E2: Communication fault between User Interface and the unit Communication cables from port X/HA, Reconnect the communication cables Y/HB was disconnected, or misconnected securely Communication cables from port X/HA, Replace the communication cables Y/HB have short circuited or damaged Replace a new User Interface, and the Replace the Main Control PCB error code still displays...
  • Page 95 KHP-MO HT HP 6.4 H0 Troubleshooting Digital display output Description Error code Description Communication error of Main Control PCB Triggering Communication failure lasts 1 min Procedure H0: Communication error of Main Control PCB Replace the Main Control PCB...
  • Page 96 KHP-MO HT HP 6.5 H1 Troubleshooting Digital display output Description Error code Communication error between Main Control PCB and Compressor & Fan Description Inverter PCB Check the communication after power-on 1 min. If no communication is Triggering detected, the error is triggered LED3 &...
  • Page 97 KHP-MO HT HP Procedure For 3Ph models H1 ： Communication error between Main Control PCB and Compressor & Fan Inverter PCB 1. 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 2.
  • Page 98 KHP-MO HT HP 6.6 Hd Troubleshooting Digital display output Description Error code Description Communication fault between master unit and slave unit. For cascade system, the communication failure between master Triggering unit and slave unit lasts 2min and above Communication port E1/H1/H2 Dip switch S3-1/2/3 0/0/0=address 0#（Master）...
  • Page 99 KHP-MO HT HP 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 Reconnect the communication cables H1H2E1 was disconnected, or securely...
  • Page 100 KHP-MO HT HP 6.7 E5, E6, E9, EA, FC1, H2, H3, F51, F31, F6, F61, F62 Troubleshooting Digital display output Description Code Description Port Locations T3 Outdoor unit heat exchanger CN34 bottom temperature sensor error T4 Ambient temperature sensor error CN45 Th Return-air temperature sensor error...
  • Page 101 KHP-MO HT HP Procedure E5, E6, E9, EA, FC1, H2, H3, F51,F31 ,F6,F61,F62 ： Temperature sensor error Temperature sensor connection on Main Reconnect the temperature sensor Control PCB is loose, misconnected, correctly and keep it dry broken or moisten Pull out temperature sensor, measure sensor resistance: If the resistance is too low(<...
  • Page 102 KHP-MO HT HP 6.8 E3, E4, E7, Eb, EC, Ed, HA, H9 Troubleshooting Digital display output Description Code Description Port Location (Main Control PCB) T1 Electric Heater/AHS water outlet CN39 temperature sensor error T5 Water tank temperature sensor CN13 error Tbt1 Balance tank temperature sensor/ Final outlet water CN24...
  • Page 103 KHP-MO HT HP 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 –...
  • Page 104 KHP-MO HT HP Procedure E3, E4, E7, Eb, EC, H9: Temperature sensor error Check the Dip switch settings or User Reset dip switch, and reboot the unit, make sure parameter are set available Interface settings as illustrated above Temperature sensor connection on Main Reconnect the temperature sensor Control PCB is loose, misconnected, correctly and keep it dry...
  • Page 105 KHP-MO HT HP 6.9 H5 Troubleshooting Digital display output Description Code Description Locations Ta room temperature sensor error Inserted on User Interface PCB Procedure H5 ： Ta Temperature sensor error Replace User Interface...
  • Page 106 KHP-MO HT HP 6.10 H8, P21, P27 Troubleshooting Digital display output Description Code Description Port Location(Main Control PCB) H-SEN High pressure sensor error L-SEN Low pressure sensor error CN46 H-SEN and L-SEN connected reversely CN3/ (Detect when compressor is off) CN46...
  • Page 107 KHP-MO HT HP Procedure H8, P21: Pressure sensor error Temperature sensor connection on Main Reconnect the temperature sensor Control PCB is loose, misconnected, correctly and keep it dry broken or moisten Measure the resistance value of sensor, and it’s consistent with the curve (refer Replace Main Control PCB to appendix to Part 4 - Temperature Sensor Resistance Characteristics)
  • Page 108 KHP-MO HT HP 6.11 E1 Troubleshooting Digital display output Description Error code E1 (For 3Ph models) Description Phase loss or phase reversal Triggering At least one of L1/L2/L3/N misconnected or disconnected Relative Terminal ports and blocks locations Procedure E1: Phase loss or phase reversal Power off the unit, and check L1/L2/L3/N Ensure L1/L2/L3/N is securely connected, on terminal block for any misconnections...
  • Page 109 KHP-MO HT HP 6.12 H7 Troubleshooting Digital display output Description Error code Description Power overvoltage and Power undervoltage protection Input voltage≤172V or Input voltage≥265V Triggering (The unit will back to normal if input voltage≥180V or input voltage ≤250V) Procedure H7: Power overvoltage and power undervoltage protection H7 occurs when powered off The system is protection enabled, and no...
  • Page 110 KHP-MO HT HP 6.13 FE Troubleshooting Digital display output Description Error code Description Lack of L2 phase fault Input voltage≤150V Triggering (The unit will back to normal if input voltage≥160V) Procedure FE: Lack of L2 phase fault Power off the unit，and check if L2 on Make sure L2 is well connected the wiring board is disconnected Measure the input voltage on terminal...
  • Page 111 KHP-MO HT HP 6.14 P0 Troubleshooting Digital display output Description Error code Description Low-pressure protection 1、The Main Control PCB detected that the low pressure was < 0.12Mpa and lasts 30 2、The Main Control PCB detected that the low pressure was < 0.13Mpa and lasts 5 Triggering seconds ,and compressor stopped running and lasts 2 min at the same time.
  • Page 112 KHP-MO HT HP Procedure P0: Low pressure protection Check “Unit Status-Operation parameter- P1 comp. pressure & P2 comp. pressure” Replace low pressure sensor on the User Interface when the unit stops running, and P1=P2 T4 sensor fell out from the fixed Re-fix the T4 sensor to the installation position or was contact with position.
  • Page 113 KHP-MO HT HP parameter-P1 comp. pressure” on the User Interface, compare it with the reference value in Discharge / Suction Refrigerant leakage. pressure and temperature range in Please contact professionals to appendix 4, and the parameter on the identify the leak position, vacuum and User Interface is lower than the one in refill the refrigerant according to the appendix 4...
  • Page 114 KHP-MO HT HP 6.15 P1 Troubleshooting Digital display output 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 The location of high pressure switch refer to Part 2 Component Layout and Refrigerant location Circuits High pressure switch plug...
  • Page 115 KHP-MO HT HP Procedure P1 occurs in Cooling mode High pressure switch connection on the inverter control PCB is loose, Reconnect high pressure switch correctly misconnected Use a digital multimeter to measure high pressure switch and the inverter control PCB with buzzer. If no buzzer sounds, high Power on and back to normal pressure switch or the inverter control PCB is damaged, replace high pressure...
  • Page 116 KHP-MO HT HP Request aftersales service P1 occurs in Heating/DHW mode Check and clean pipe and filter, make Check “Unit Status-Error info.” on sure water pressure and water flow rate the User Interface, and E8/E0/P5 code is in the proper range as above. also occurred barely at the same time For more details, refer to E8/E0/P5 troubleshooting procedure.
  • Page 117 KHP-MO HT HP P1 occurs in Off status Check “Unit Status-Operation parameter- P1 comp. pressure & P2 comp. pressure” Request aftersales service on the User Interface, and P1&P2<3.5MPa Check whether high pressure switch plug Re-connect the high pressure witch plug was disconnected, or misconnected Measure the high pressure switch to Replace high pressure switch...
  • Page 118 KHP-MO HT HP 6.16 P3 Troubleshooting Digital display output Description Error code Description Overcurrent protection Triggering The Main Control PCB detected that the input current is higher than protection value Teminal block Procedure P3 occurs in heating / DHW mode Measure the input voltage of terminal block, Adjust the power supply based on the and it’s<198V...
  • Page 119 KHP-MO HT HP Reboot the unit, hold the electronic expansion valve coil to feel whether it is Request aftersales service working, and listen the “Click” sound when the valve turns on/off. Power off the unit, confirm whether Reconnect the compressor cables compressor cables were disconnected, or correctly misconnected...
  • Page 120 KHP-MO HT HP P3 occurs in cooling mode Measure the input voltage of terminal block, Adjust the power supply based on the and it’s<198V rated voltage range Use a current clamp to measure the current of power cables connected to L on terminal block, compare it with “Unit Status- Replace the inverter control box Operation parameter-ODU current”...
  • Page 121 KHP-MO HT HP Use a digital multimeter to measure the resistance between each two of compressor Replace the compressor terminals. The resistance <10 Ohm or the resistance=0 (Short circuited) Power off the unit and identify whether Compressor & Fan Inverter PCB failed. (Refer Replace the inverter control box to Appendix to part 4: Guide for identifying Compressor &...
  • Page 122 KHP-MO HT HP 6.17 P4 Troubleshooting Digital display output Description Error code Description The protection for overheat discharge temperature of Compressor The Main Control PCB detected that the compressor discharge temperature was ≥ Triggering 115℃ Relative You can find Tp sensor by the sensor cable from Tp port ports and locations Tw_in...
  • Page 123 KHP-MO HT HP Procedure Pull out Tp temperature sensor from compressor fixed sleeve, leave it in the air for 10 min, 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 Appendix...
  • Page 124 KHP-MO HT HP 6.18 Pd Troubleshooting Digital display output Description Error code Description The protection for overheat condensing temperature The Main Control PCB detected that it’s in cooling mode and the condensing Triggering temperature was ≥65℃ Relative ports and locations...
  • Page 125 KHP-MO HT HP Procedure Pd: The protection for overheat condensing temperature in cooling mode Check “Unit Status-Operation parameter- Replace the Main Control PCB or high P1 comp. pressure & P2 comp. pressure” pressure sensor.（Refer to section on the User Interface when the unit stops 6.10.3:H8/P21 troubleshooting running, and P1=P2 procedure）...
  • Page 126 KHP-MO HT HP 6.19 HP Troubleshooting Digital display output Description Error code Description Low pressure protection in cooling mode The Main Control PCB detected that the suction pressure P2<0.35Mpa for 5 seconds in Triggering cooling mode and compressor running over 300 seconds. Tw_in Tw_out...
  • Page 127 KHP-MO HT HP Procedure HP: Low pressure protection in cooling mode Install the Tw_out sensor back to the Check whether Tw_out sensor felt out installation port, so they can detect the from installation port actual temperature. Pull out Tw_out / Tw_in sensor from plate heat exchanger, leave it in the air for 10 min, if the temperature difference between sensor and air is greater than...
  • Page 128 KHP-MO HT HP 6.20 bA Troubleshooting Digital display output 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℃...
  • Page 129 KHP-MO HT HP Procedure bA: T4 sensor out of operation range protection The actual ambient temperature ≥65℃ The actual ambient temperature is out of or <-25℃ in heating mode; or the actual range, so Protection program activated. ambient temperature≥65℃ or <-5℃ No action required.
  • Page 130 KHP-MO HT HP 6.21 PP, Hb Troubleshooting Digital display output Description Error code The protection for abnormal temperature Description difference between outlet water and inlet 3 times of PP in heating/DHW mode water Twout-Twin≥3℃ and lasts 15 min in 3 times of PP in heating/DHW mode. cooling mode Triggering When Twout<7℃...
  • Page 131 KHP-MO HT HP Procedure PP in cooling mode Outlet pipe and inlet pipe connected Re-connect the pipes securely reversely Tw_in sensor and Tw_out sensor connected reversely on plate heat Re-connect the sensors securely exchanger or on Main control PCB Pull out Tw_out/Tw_in sensor from plate heat exchanger, leave it in the air for 10 min, if the temperature difference between sensor and air is greater than...
  • Page 132 KHP-MO HT HP PP/Hb in heating/DHW mode Outlet pipe and inlet pipe connected Re-connect the pipes securely reversely Tw_in sensor and Tw_out sensor connected reversely on plate heat Re-connect the sensors securely exchanger or on Main control PCB Pull out Tw_out / Tw_in sensor from plate heat exchanger, leave it in the air for 10 min, if the temperature difference between sensor and air is greater than...
  • Page 133 KHP-MO HT HP 6.22 P5 Troubleshooting Digital display output 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 Procedure P5 ： The big temperature difference between outlet water temp.
  • Page 134 KHP-MO HT HP Whether the heating water temperature rises rapidly, the cooling water temperature drops rapidly, and the unit stops quickly. You can Check the temperature by “Unit Re-select a model of proper capacity Status-Operation parameter-Tw_in plate water inlet temp. and Tw_out plate water outlet temp.”...
  • Page 135 KHP-MO HT HP 6.23 C7 Troubleshooting Description Error code Description Overheat temperature protection for IPM module Triggering IPM module temperature ≥ 95℃ Digital display output Procedure C7 ： Overheat temperature protection for IPM module Check whether the software version of Upgrade correct software the inverter control box is correct The unit was installed in a site that is...
  • Page 136 KHP-MO HT HP 6.24 H4, L** Troubleshooting Digital display output Description Error code Description Note 3 times of “L1*” in 60 min Check the specific code on digital display panel on the Inverter module protection Main Control PCB The specific L** code table: Error code Description Note...
  • Page 137 KHP-MO HT HP Compressor terminals short circuit protection IPM short circuit protection Action of high pressure switch PED bH error Procedure H4, L**: Inverter module protection Check whether the software version of the Compressor & Fan Inverter PCB is Upgrade correct software correct Power off the unit, the compressor connection cables was disconnected, or...
  • Page 138 KHP-MO HT HP H6, H61 HH, J** Troubleshooting Digital display output Description Error code Description Note H6 / H61 Fan failure 10 times of H6 / H61 in 120min Check the specific code on digital display panel on the Fan module failure Main Control PCB The specific J** code table: Error code...
  • Page 139 KHP-MO HT HP Procedure H6,H61, HH ， J**: Fan failure Power off the unit, the fan connection cables was disconnected, or Reconnect the cables correctly misconnected Use a digital multimeter to measure the resistance between each two of fan Replace the fan terminals.
  • Page 140 The driving program of Compressor & Fan Inverter PCB is detected as being Triggering mismatched with Dip switch Relative ports Dip switch S5 S6 and locations Aquantia KHP-MO HT HP series:0/0/0/0 DIP switch Dial settings 3-phase for 0011 ON=1 26kW unit...
  • Page 141 KHP-MO HT HP Procedure HF ： Outdoor unit EEPROM error Set the Dip switch to the correct position, and re-power the unit after 20s, the error Back to normal still displays Replace Main Control PCB Back to normal Replace the Compressor & Fan Inverter...
  • Page 142 KHP-MO HT HP 6.26 Pb Troubleshooting Digital display output 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 143: Discharge / Suction Pressure And Temperature Range

    KHP-MO HT HP 7 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 Twout+10＜Tp＜Twout+25 10℃≤T4＜25℃ T4≥25℃ Twout+10＜Tp＜Twout+25 Note: T4: ambient temperature Tw_out: leaving water temperature.

  • Page 144: Appendix To Part 4

    KHP-MO HT HP 8 Appendix to Part 4 8.1 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 T9i Economizer inlet temperature sensor T9o Economizer outlet temperature sensor...
  • Page 145 KHP-MO HT HP Resistance (kΩ) Resistance (kΩ) Temp. (°C) Temp. (°C) Rmax R （ t ） Normal Rmin Rmax R （ t ） Normal Rmin 10.8 10.473 10.147 2.077 1.953 1.833 10.3 2.004 1.883 1.766 9.848 9.551 9.255 1.934 1.816 1.702 9.418 9.125...
  • Page 146 KHP-MO HT HP Applied to Tp Discharge temperature sensor R90℃=5KΩ±3%，B25/50=3950K±3% Resistance (kΩ) Resistance (kΩ) Temp. (°C) Temp. (°C) Rmax R （ t ） Normal Rmin Rmax R （ t ） Normal Rmin 2002.628 1642.059 1281.49 318.604 271.634 224.664 1881.964 1544.968 1207.972 302.08 257.867...
  • Page 147 KHP-MO HT HP Resistance (kΩ) Resistance (kΩ) Temp. (°C) Temp. (°C) Rmax R （ t ） Normal Rmin Rmax R （ t ） Normal Rmin 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...
  • Page 148 KHP-MO HT HP Resistance (kΩ) Resistance (kΩ) Temp. (°C) Temp. (°C) Rmax R （ t ） Normal Rmin Rmax R （ t ） Normal Rmin 3.045 2.901 2.758 1.707 1.59 1.473 2.962 2.819 2.676 1.665 1.55 1.434 2.881 2.739 2.597 1.625 1.511 1.397...
  • Page 149 KHP-MO HT HP 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.
  • Page 150 KHP-MO HT HP Resistance (kΩ) Resistance (kΩ) Temp. (°C) Temp. (°C) Rmax R （ t ） Normal Rmin Rmax R （ t ） Normal Rmin 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...
  • Page 151 KHP-MO HT HP Resistance (kΩ) Resistance (kΩ) Temp. (°C) Temp. (°C) Rmax R （ t ） Normal Rmin Rmax R （ t ） Normal Rmin 2.787 2.606 2.425 1.553 1.436 1.318 2.711 2.533 2.356 1.515 1.399 1.284 2.637 2.463 2.288 1.477 1.364 1.251...
  • Page 152 KHP-MO HT HP 8.2 Pressure and Output voltage characteristics of Pressure sensor Pressure and Output voltage characteristics of Pressure sensor 5,00 Low pressure sensor High pressure sensor 4,50 y = 2x + 0,5 y = 0.87x + 0.5 4,00 3,50 3,00 2,50 2,00...
  • Page 153 KHP-MO HT HP 8.3 Guide for identifying Compressor & Fan Inverter PCB or Fan Inverter PCB failure Before measuring the Compressor & Fan Inverter PCB or Fan Inverter PCB, please confirm steps below in advance: 1) Cut off the power supply. 2) Wait for 10 min for capacitor discharging in order to avoid the electric shock.
  • Page 154 KHP-MO HT HP Compressor & Fan Inverter PCB Inverter circuit (Fan module/ Compressor module): Test point Order Normal Abnormal +(Red) - （ Black ） P-in P-in P-in 0.3 V-0.7 V 0 / Infinite Note: 1. If any one of test value abnormal, the Compressor & Fan Inverter PCB failed. Request aftersales service and replace the Compressor &...
  • Page 155 KHP-MO HT HP Fan Inverter PCB Inverter circuit (The second Fan module): Test point Order Normal Abnormal +(Red) - （ Black ） 0.3 V -0.7 V 0 / Infinite Note: 1. If any one of test value abnormal, the Fan Inverter PCB failed. Request aftersales service and replace the Fan Inverter PCB. Fan Inverter PCB...
  • Page 156 KHP-MO HT HP...

  • Page 157: General Information

    Kaysun will introduce a new generation of heat pumps that operate using R290 refrigerant. Theoretically, R290 is a highly flammable A3 refrigerant, but its risk can be effectively eliminated through product design and various aspects of control. This refrigerant has also been widely used in air conditioners, refrigerators, heat pumps, and other products in recent years.

  • Page 158: Storage Precautions

    refrigerant by a passenger plane or cargo aircraft. If air dissolution, or take extraction (indoor) or strong ventilation transportation is required, up to 150 kg of flammable refrigerant (outdoor) measures. If possible, use explosion-proof exhaust fans can be carried in cylinders, so that the system can be charged on to transfer the leaked gas to an open place or install an site.
  • Page 159 Precautions for maintenance requirements The refrigerant must be charged using dedicated explosion-proof charging Installation safety principles equipment. Accuracy requirement: The 1. The premises for installation should be kept ventilated. deviation of the charging amount is less than 2. Open flame or a high-temperature heat source with a 5 g.
  • Page 160 Maintenance personnel must have repair qualifications the unit is below the alarm value before performing maintenance certified by Kaysun or a local third party for flammable refrigerants. operations. Ⅱ .Before repairing R290 refrigerant unit, prepare the 2.
  • Page 161 pressure for 30 minutes without any changes, the system is in a the installation site for reinstallation. Pay attention to the protection vacuum state and without any leaks, before R290 refrigerant can of the unit during installation to avoid refrigerant leakage caused be recharged.
  • Page 162 Ver. 2024-10V1...

This manual is also suitable for:

Aquantia khp-mo 26 dtpAquantia khp-mo 30 dtpAquantia khp-mo 35 dtpAquantia khp-mo 40 dtp

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