Gree VERSATI II+ Series Service Manual
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Gree VERSATI II+ Series Service Manual

Gree VERSATI II+ Series Service Manual

Split type high-temperature versati water heater
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Split Type High-temperature Versati Water Heater

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Summary of Contents for Gree VERSATI II+ Series

  • Page 1 Change for life Service Manual Split Type High-temperature Versati Water Heater...

  • Page 2: Table Of Contents

    Contents Product Data ........................1 1 Product Data ....................... 1 1.1 Lineup ..........................1 1.2 Nomenclature ........................1 1.3 Product Features ......................2 1.4 Operating Principle ......................4 1.5 Technical Data ........................5 2 Outline Dimensions ....................8 2.1 Outline Dimensions of the Outdoor Unit ................8 2.2 Outline Dimensions of the Indoor Unit ................9 3 Explosive Views and Part Lists ................
  • Page 3 7.2 Heat Load Calculation .....................21 7.3 Model Selection ......................23 Control .......................... 24 1 Integral Control Concept ..................24 1.1 Control Principle Diagram ....................24 1.2 Control Flowchart ......................26 2 Main Control Logics ....................27 2.1 Cooling ..........................27 2.2 Heating ..........................27 2.3 Water Heating .......................27 2.4 Shutdown ........................28 2.5 Control to the Compressor ....................28 2.6 Control to the Fan ......................28...
  • Page 4 4.9 Installation of Protective Layer on the Connection Pipe ..........68 4.10 Electric Wiring .......................70 4.11 Wiring of the Terminal Board ..................72 4.12 Wiring of the 2-Way Valve .....................73 4.13 Wiring of Other Auxiliary Heat Sources .................74 4.14 Wiring of the Gate-Controller ..................74 4.15 Wiring of the Remote Air Temperature Sensor .............74 4.16 Wiring of the Thermostat ....................75 4.17 Wiring of the Control .....................76...

  • Page 5: Product Data

    Air-to-water Heat Pump Split Versati SPLIT TYPE Product Data 1 Product Data 1.1 Lineup 1.1.1 Main Unit Cooling Heating Power Series Model Product Code Capacity Capacity Refrigerant Appearance Supply (kW) (kW) GRS- ER01001210 CQ8.0Pd/ NaD-K 220-240VAC 50Hz GRS- ER01001220 CQ10Pd/ NaD-K R410A GRS-...

  • Page 6: Product Features

    Air-to-water Heat Pump Split Versati SPLIT TYPE Description Options GREE G: GREE Air to water heat pump Heat Pump Water Heater Heating Mode S: Static; C: Circulating Function Default: Single-function; Q: Multi-function Nominal Heating Capacity 6.0: 6.0kW; 8.0: 8.0kW;10: 10kW; 12: 12kW; 14: 14kW; 16: 16kW Compressor Style Pd: DC Inverter;...
  • Page 7 Air-to-water Heat Pump Split Versati SPLIT TYPE (4) Values of resistance to compressor status: 4/6/8KW——UV/VW/UW:1.67±7%Ω 10/12/14/16kW——UV/VW/UW:0.79±7%Ω Upper flange Upper rolle Upper cylinder Partition Lower cylinder Lower flange Cover plate Crank High-efficiency Component(Inverter pump, Inverter fan, Plate heat exchanger) ◆ (1) The A-class high-efficiency inverter water pump which complies with the European ErP directive, can control the running frequency based on the actual load.

  • Page 8: Operating Principle

    Air-to-water Heat Pump Split Versati SPLIT TYPE Smart Control, Powerful Function ◆ (1) The running mode can be switched freely. Furthermore, based on different demands, the holiday mode, weather-dependent mode, quite timer, temperature timer and floor commissioning can activated. (2) Multiple protections can make this product much safer. The added electric heater will prevent the plate heat exchanger from being frostbitten owing to too low water temperature and resultantly extend the service life of the product and enhance its safety and reliability.

  • Page 9: Technical Data

    Air-to-water Heat Pump Split Versati SPLIT TYPE Name Name Name Leaving Water Environment Temperature Temperature of the Electric Water Pump for the Solar System Sensor Heater Defrosting Temperature Water Pump Solar Panel Sensor Filter Flow Switch Solar Panel Temperature Sensor Electronic Expansion Valve Leaving Water Pipe Entering Water Temperature for the...
  • Page 10 7~25 10~48 Heating 20~60 -20~35 Water Heating 40~80 (Water Tank Temperature) -20~45 Note: when operating conditions are out of the range listed above, please contact GREE. 1.5.4 Electric Data Minimum Sectional Leakage Minimum Sectional Power Supply Area of Power Switch...
  • Page 11 Air-to-water Heat Pump Split Versati SPLIT TYPE Minimum Sectional Leakage Minimum Sectional Power Supply Area of Power Switch Area of Earth Wire Supply Wire Model V,Ph,Hz GRS-CQ12Pd/NaD-M(O) 4×2.1 GRS-CQ14Pd/NaD-M(O) 4×2.1 380-415VAC,3N,50Hz GRS-CQ12Pd/NaD-M(I) 4×3.3 GRS-CQ14Pd/NaD-M(I) 4×3.3 Notes (a) Leakage Switch is necessary for additional installation. If circuit breakers with leakage protection are in use, action response time must be less than 0.1 second, leakage circuit must be 30mA.

  • Page 12: Outline Dimensions

    Air-to-water Heat Pump Split Versati SPLIT TYPE Calculation of actual cooling capacity: actual cooling capacity = nominal cooling capacity x cooling capacity correction coefficient. Heating Capacity Correction ◆ GRS-CQ8.0Pd/NaD-K, GRS-CQ10Pd/NaD-K, GRS-CQ12Pd/NaD-M, GRS-CQ14Pd/NaD-M Performance Correction Outflow Ambient Temperature °C(°F) Heated -15(5) -10(14) -5(23) 0(32)

  • Page 13: Outline Dimensions Of The Indoor Unit

    Air-to-water Heat Pump Split Versati SPLIT TYPE (2) GRS-CQ12Pd/NaD-M(O), GRS-CQ14Pd/NaD-M(O) 2.2 Outline Dimensions of the Indoor Unit (1) GRS-CQ8.0Pd/NaD-K(I), GRS-CQ10Pd/NaD-K(I)

  • Page 14: Explosive Views And Part Lists

    Air-to-water Heat Pump Split Versati SPLIT TYPE (2) GRS-CQ12Pd/NaD-M(I), GRS-CQ14Pd/NaD-M(I) 3 Explosive Views and Part Lists GRS-CQ12Pd/NaD-M(I), GRS-CQ14Pd/NaD-M(I)
  • Page 15 Air-to-water Heat Pump Split Versati SPLIT TYPE Parts List of GRS-CQ12Pd/NaD-M(I) for ER010N1190, GRS-CQ14Pd/NaD-M(I) for ER010N1200 Name of part Part Code Quantity Front panel cover 01262866P Receiver Board 30261014 Temperature Sensor 3900028316G Front Panel 01542808 Display Board 30292000031 Electric Box Assy 01392800199 Chassis 01282800058...
  • Page 16 Air-to-water Heat Pump Split Versati SPLIT TYPE (2) GRS-CQ12Pd/NaD-M(O), GRS-CQ14Pd/NaD-M(O) Parts List of GRS-CQ12Pd/NaD-M(O) for ER010W1190, GRS-CQ14Pd/NaD-M(O) for ER010W1200 Name of part Part Code Quantity Front Grill 01574100009 Front Side Plate 01314100012P Cabinet 01514100002P Diversion Circle 10474100001 Axial Flow Fan 10338731 Brushless DC Motor 15704100013...

  • Page 17: Supply Scope

    Air-to-water Heat Pump Split Versati SPLIT TYPE Name of part Part Code Quantity Strainer 0721212101 Condenser Assy 01122800089 Sensor Support 26905202 Sensor (High Pressure) 322101032 Gas-liquid Separator Sub-Assy 0722501801 Pressure Protect Switch 460200062 4-Way Valve 43040000002 Magnet Coil 4300040030 Sensor 322101002 Temp Sensor Sleeving 05212423...

  • Page 18: Model Selection

    Air-to-water Heat Pump Split Versati SPLIT TYPE Model Selection 1 Installation Example CASE 1: Connecting Under-floor Coil for Heating and Cooling Underfloor coil Outdoor unit Indoor unit Radiator FCU1 FCU2 Remote room thermostat 2-way valve (field supplied) (field supplied) Control line Bypass valve (field supplied) Hi-temp line Low-temp line...

  • Page 19: Model Selection

    Air-to-water Heat Pump Split Versati SPLIT TYPE (b) Sanitary water tank should be equipped with internal electric heater to secure enough heat energy in the very cold days; CASE 3: Connecting Sanitary Water Tank and Heat Emitters for Heating and Cooling Underfloor coil Radiator FCU1...

  • Page 20: Flowchart Of Model Selection

    Air-to-water Heat Pump Split Versati SPLIT TYPE Capacities and power inputs are based on the following conditions (FCU or radiator) a. Cooling conditions b. Heating conditions Indoor Water Temp 12°C/7°C; Indoor Water Temp 40°C/45°C; Outdoor Air Temp 35°C DB/24°C WB Outdoor Air Temp 7°C DB/6°C WB 2.3 Flowchart of Model Selection Calculate the load...

  • Page 21: Selection Of Tube Spacing Of The Underfloor Coils

    Air-to-water Heat Pump Split Versati SPLIT TYPE 3.2 Selection of Tube Spacing of the Underfloor Coils Tube spacing of the underfloor coils which will directly affect heat dissipation of the floor depends on the tube material, indoor design temperature, supply water temperature and floor material. Heat Dissipation of Commonly Used Coils (Tube material: PE-X, Indoor temperature:18°C, Average water temperature:45°C) Thermal...

  • Page 22: Quantity And Location Of The Water Manifold

    Air-to-water Heat Pump Split Versati SPLIT TYPE Underfloor Coil Selected Unit Length of underfloor coils is recommended to be within 100m and length of each branch should be kept the same to the most extent. 4 Quantity and Location of the Water Manifold The water manifold is a kind of device for distributing water for the water supply and return tubes.

  • Page 23: Requirements On Installation Of The Water Manifold

    Air-to-water Heat Pump Split Versati SPLIT TYPE (5) Distance between the unit and the water manifold should be within 15m. If the distance exceeds 20m, then it is required to calculate the hydraulic power. 4.2 Requirements on Installation of the Water Manifold (1) The water manifold should be installed on the wall or inside the special box.

  • Page 24: Selection Of Fcu

    Air-to-water Heat Pump Split Versati SPLIT TYPE 5 Selection of FCU 5.1 FCU Type Selection The air-water fan coil unit is optional for Versati units. 5.2 Matching of Capacity Load of the FCU is better to be between 70%~120% of the Versati unit. Notes: (a) When load of the FCU is too small, the unit would start/stop frequently, which is adverse for oil return.

  • Page 25: Volume Selection Of The Water Tank

    Air-to-water Heat Pump Split Versati SPLIT TYPE 6.2 Volume Selection of the Water Tank 6.2.1 Selection Based on Water Consumption Per Capita Building Type Unit Daily Water Consumption (L) Water Temperature (°C) Apartment Per person, Per day 40~80 Villa Per person, Per day 70~110 6.2.2 Selection Based on Sanitary Utensils Daily Water...
  • Page 26 Air-to-water Heat Pump Split Versati SPLIT TYPE 7.2.2 Arrangement Design of the Underfloor System for A Single Floor Assumed conditions: the floor is cement or ceramics, the normal external diameter of the heating pipe is 20mm, thickness of the stuffer is 50mm, thickness of PS foam insulation is 20mm, supply water temperature is 45°C, return water temperature is 35°C, indoor design temperature is 20°C.

  • Page 27: Model Selection

    Air-to-water Heat Pump Split Versati SPLIT TYPE 7.3 Model Selection Heat demand for a single layer: 3196W Heat loss for a single layer: 1016W Total heat load for a single layer: 4212W Total heat load of the building: 8424W Capacity of the main unit should be larger than 8424W, so we can select: GRS-CQ10Pd/NaD-K.

  • Page 28: Control

    Air-to-water Heat Pump Split Versati SPLIT TYPE Control 1 Integral Control Concept 1.1 Control Principle Diagram Output Control Main Unit Field Instalaltion RS485 Power Main Board Supply Field Instalaltion Main Unit Input Control (1) The environment temperature is detected by the sensor installed at fins of the finned heat exchanger, which is mainly used to control the initialization steps of the fan and the Electronic expansion valve and also limit the maximum running frequency of the compressor.
  • Page 29 Air-to-water Heat Pump Split Versati SPLIT TYPE (4) The suction temperature is detected by the sensor installed at the suction pipe of the compressor, which is mainly used to control superheating degree. When this sensor fails, this error will be displayed at the controller, all loads except the water pump of the solar system and the electric heater of the water tank will stop.

  • Page 30: Control Flowchart

    Air-to-water Heat Pump Split Versati SPLIT TYPE (14) Only when the control function of the thermostat has been activated through the wired controller, then the thermostat can switch run modes among cooling, heating and shutdown, otherwise, the unit will run as per the run mode set by the wired controller.

  • Page 31: Main Control Logics

    Air-to-water Heat Pump Split Versati SPLIT TYPE 2 Main Control Logics 2.1 Cooling 2.1.1 Control to the Compressor When the unit is controlled by the leaving water temperature, the operating frequency of the compressor will be adjusted by the temperature difference in the way that it increases as the temperature difference goes up and it decreases as the temperature difference goes down.

  • Page 32: Shutdown

    Air-to-water Heat Pump Split Versati SPLIT TYPE difference, and the water tank keeps shut-down. when the water tank temperature set point is higher than the maximum value of the water heating range • of the main unit but the actual water tank temperature is lower than the maximum value of the water heating range of the main unit, the auxiliary electric heater of the main unit will run depending on the temperature difference.

  • Page 33: Control To The 4-Way Valve

    Air-to-water Heat Pump Split Versati SPLIT TYPE ends up. 2.7 Control to the 4-way Valve The 4-way valve always keeps on under the cooling mode and will off after the compressor starts up under the heating or water heating mode. When the unit comes into defrosting, the 4-way valve will be on and resume the off status when defrosting ends up.

  • Page 34: Control Panel

    Air-to-water Heat Pump Split Versati SPLIT TYPE (7) Communication Error When the indoor unit main board or drive board does not receive correctly any data from the unit main board, all loads will stop and vice versa. 3 Control Panel 3.1 External View This manual is applicable to both split type and bloc type versati heat pumps water heaters.
  • Page 35 Air-to-water Heat Pump Split Versati SPLIT TYPE Symbol Name Functional Description ON/OFF key It is intended to turn on or off the unit. Cancel/Return key It is intended to go to the higher level menu. OK key It is intended to save the setting or go to the submenu. Function key no.

  • Page 36: Operation Instructions

    Air-to-water Heat Pump Split Versati SPLIT TYPE Item Functional Description T-water out It indicates the actual leaving water temperature. T-outdoor It indicates the actual outdoor environment temperature. Key lock It indicates if the key lock is activated or deactivated. FUNC. It is intended to access to the function setting page.
  • Page 37 Air-to-water Heat Pump Split Versati SPLIT TYPE (h) The control will return automatically to the homepage where there is no any key operation in 10 consecutive minutes. 3.2.2 Function Setting It enables the user to set each function. [Operation Instructions] (1) At the homepage, by pressing the Function key no.
  • Page 38 Air-to-water Heat Pump Split Versati SPLIT TYPE Function Settings Full Name Displayed Name Range Default Remarks 1. When the water tank is Cool unavailable, then only “Cool” Heat Running mode and “Heat” are included in the Mode Hot water Heat setting range.
  • Page 39 Air-to-water Heat Pump Split Versati SPLIT TYPE Full Name Displayed Name Range Default Remarks When the water tank is unavailable, this setting will be reserved. If it is set to “On”, the solar kit will function no matter if the timer is activated or not; if it Solar kit Solar kit On/Off/Timer...
  • Page 40 Air-to-water Heat Pump Split Versati SPLIT TYPE Full Name Displayed Name Range Default Remarks When it is set to "With", this function can be activated/timed/ Solar heater Solar heater With/Without Without deactivated. When it is set to "Without", this function will be deactivated.
  • Page 41 Air-to-water Heat Pump Split Versati SPLIT TYPE When hot water is needed urgently, this function can be configured to be “On”, In this case, the heat pump and the water tank heater will work together to generate sanitary hot water in a quickest way. [Operation Instructions] Go to the FUNCTION page and locate “Fast hot water”, then, configure it through the Up/Down key , “On”...
  • Page 42 Air-to-water Heat Pump Split Versati SPLIT TYPE of the unit will correspondingly decrease. [Operation Instructions] Go to the FUNCTION page and locate “Quiet”, then, configure it through the Up/Down key , “On” or “Off”. [Notes] (a) It can be set to “On” or “Off” no matter if the unit is in operation or not, but this function works only when the unit is turned on.
  • Page 43 Air-to-water Heat Pump Split Versati SPLIT TYPE [Notes] (a) Once it is activated, it should be deactivated manually. (b) This setting will be memorized upon power failure. (c) At the “Parameter View” page, it is able to check the set point at the Weather-dependent Mode. (d) When it is activated, it is allowed to set the room temperature but the set point does not take effective.
  • Page 44 Air-to-water Heat Pump Split Versati SPLIT TYPE (b) It can be set to “On” or “Off” no matter if the unit is in operation or not (c) When "Disinfection" has been activated, the unit will perform disinfection at the set time once each week. (d) When “Disinfection”...
  • Page 45 Air-to-water Heat Pump Split Versati SPLIT TYPE (4) When above settings are finished, pressing the Return key and then pressing “Save”, a pop-up window will pop up to remind if you are determined to save these settings. If so, press the OK key .
  • Page 46 Air-to-water Heat Pump Split Versati SPLIT TYPE (c) When “Weekly timer” has been set successfully, water heating, solar heater or water tank heater is available and water temperature set point is higher than 50 ，at this time if stopping the solar heater or water tank heater (including the solar timer is timed to be off), then water tank tempeature will be always kept at 50 .
  • Page 47 Air-to-water Heat Pump Split Versati SPLIT TYPE (2) At the CLOCK TIMER setting page, by the Left/Right key select the desired parameter and then by the Up/Down key configure it. (3) When this setting is concerned about time value, by pressing the Function key no. 1 alternately set the hour or minute values, and by pressing the Up/Down key increase or decrease the...
  • Page 48 Air-to-water Heat Pump Split Versati SPLIT TYPE [Notes] (a) When “Weekly timer”, “Clock timer”, and “Temp. timer” settings are performed at the same time, the last one takes precedence. (b) This function works only when the unit is in operation. (c) The allowed running modes include “Heat”...
  • Page 49 Air-to-water Heat Pump Split Versati SPLIT TYPE [Operation Instructions] (1) At the homepage, by pressing the Function key access to the FUNCTION page, and then locate where “Floor debug” is, after that, press OK key to go to the FLOOR DEBUG setting page. (2) At the FLOOR DEBUG setting page, by the Left/Right key select the desired parameter and then by the Up/Down key...
  • Page 50 Air-to-water Heat Pump Split Versati SPLIT TYPE box will pop up, warning “Wrong Floor Debug time!”. It will resume only by pressing “OK” and then correcting the time. 3.2.2.17 Emergency Mode (Emergen. Mode) When the compressor fails to run owing to some urgent condition, this function will allow the unit to run in the “Heat”...
  • Page 51 Air-to-water Heat Pump Split Versati SPLIT TYPE will pop up, warning “Please disable the Holiday Mode !”. 3.2.2.19 Thermostat When the thermostat has been installed, it can be used to control the run mode of the unit (only “Heat”or “Cool”mode) [Operation Instructions] (1) Locate where “Thermostat”...
  • Page 52 Air-to-water Heat Pump Split Versati SPLIT TYPE When the water tank is installed, it is suggested to activate it. In this case, the water tank will go to the standby status and will start after the control program has made this decision based on the actual demand and the environment temperature.
  • Page 53 Air-to-water Heat Pump Split Versati SPLIT TYPE [Notes] It will be memorized upon power failure. 3.2.2.29 Floor config It can be configured to be “With” or “Without” based on the actual condition. [Operation Instructions] Go to the FUNCTION page and locate “Floor config”, then, configure it through the Up/Down key “With”...
  • Page 54 Air-to-water Heat Pump Split Versati SPLIT TYPE is ineffective (except for the combined key operation), or a dialogue box will pop up, warning"Keycard uninserted!". (b) It will not be memorized upon power failure. 3.2.3 Parameter Setting (Parameter Set) 3.2.3.1 User Parameter Setting At the parameter setting pages, each parameter is configurable, like: water out temperature for cooling, water out temperature for heating, and water tank temperature etc.
  • Page 55 Air-to-water Heat Pump Split Versati SPLIT TYPE Displayed Full Name Range(°C) Range(°F) Default Name 25~60°C[High 77~140°F[High Water out 45°C/113°F[High temp.] temp.] temp.] temperature for WOT-Heat 35°C/95°F[Normal 25~45°C[Normal 77~113°F[Normal heating temp.] temp.] temp.] Room temperature RT-Cool 18~30°C 64~86°F 24°C/75°F for cooling Room temperature RT-Heat 18~30°C...
  • Page 56 Air-to-water Heat Pump Split Versati SPLIT TYPE Displayed Full Name Range(°C) Range(°F) Default Name Lower limit ambient temperature at the Lower AT-Cool 10~25°C 50~77°F 25°C/77°F Weather-dependent Mode for cooling Upper limit temperature at the Upper AT-Cool 26~48°C 79~118°F 40°C/104°F Weather-dependent Mode for cooling 27°C/81°F Upper limit room...
  • Page 57 Air-to-water Heat Pump Split Versati SPLIT TYPE At the view pages, the user is enabled to view the unit’s running state, running parameters, errors, version of the wired controller etc. [Operation Instructions] At the homepage, by pressing the Function key no.3 , it is able to go to the VIEW page as shown in the figure below.
  • Page 58 Air-to-water Heat Pump Split Versati SPLIT TYPE Compressor running state Compressor On/Off Fan 1 running state Fan 1 On/Off Fan 2 running state Fan 2 On/Off Heat pump-water pump HP-pump On/Off Solar water pump running state SL-pump On/Off Swimming-pump (invalid) Swimming-pump (invalid) On/Off Tank heater running state...
  • Page 59 Air-to-water Heat Pump Split Versati SPLIT TYPE Full Name Displayed Name Defrost temperature T-defrost Plate heat exchanger Water in temperature T-water in PE Plate heat exchanger water-out temperature T-waterout PE E-heater water-out temperature T-waterout EH Water tank temperature set point T-tank ctrl.
  • Page 60 Air-to-water Heat Pump Split Versati SPLIT TYPE like swimming pool heating function. See the following table for error description. Full Name Displayed Name Error Code Ambient temperature sensor error Ambient sensor Defrost temperature sensor error Defro. sensor Discharge temperature sensor error Disch.
  • Page 61 Air-to-water Heat Pump Split Versati SPLIT TYPE Full Name Displayed Name Error Code Drive module resetting Driver reset Compressor over-current Com. over-cur. Overspeed Overspeed Sensing circuit error or current sensor error Current sen. Desynchronizing Desynchronize Compressor stalling Comp. stalling Radiator or IPM or PFC module overtemperature Overtemp.-mod.
  • Page 62 Air-to-water Heat Pump Split Versati SPLIT TYPE language, On/off memory, time & date etc. [Operation Instructions] At the homepage, by pressing “GEN.” access to the GENERAL SET page. At this page, it is able to set “Temp. unit”, “Language”, “On/off memory”, “Time & Date”, “Beeper” and “Back light”, as shown in the figure below.
  • Page 63 Air-to-water Heat Pump Split Versati SPLIT TYPE not, press the Cancel key to not save this setting. The saving setting will update at the upper left corner of the control. 3.2.6 Key Lock This function can be activated or deactivated through the wired controller. Once it is activated, any key operation will become ineffective.

  • Page 64: Unit Installation

    Air-to-water Heat Pump Split Versati SPLIT TYPE UNIT INSTALLATION 1 Installation Guides WARNING • Installation should be performed by service personnel, or improper installation would lead to unusual operation, water leakage, electric shock or fire hazard. • The unit should be installed on the foundation which is capable of supporting the unit, or the unit would fall off or even lead to personal injury.

  • Page 65: Installation Positions Of The Indoor Unit

    Air-to-water Heat Pump Split Versati SPLIT TYPE 1.2 Installation Positions of the Indoor Unit (1) Avoid direct sunshine. (2) Ensure the hanger rod, ceiling and building structure have sufficient strength to support the weight of air conditioner unit. (3) Drainage pipe is easy to connect out. (4) Indoor and outdoor connection pipes are easy to go outdoors.

  • Page 66: Service Tools

    Air-to-water Heat Pump Split Versati SPLIT TYPE Usage Name Picture Water Manifold It is used to distribute water. Pipe and Pipe It is used to connect the water pipes. Joint Cut-off Valve It is used to cut off or get through the waterway. 3 Service Tools Name Appearance...

  • Page 67: Installation Instructions

    Air-to-water Heat Pump Split Versati SPLIT TYPE 4 Installation Instructions 4.1 Installation Examples CASE 1:Connecting Under-floor Coil for Heating and Cooling Underfloor coil Outdoor unit Indoor unit Radiator FCU1 FCU2 Remote room thermostat 2-way valve (field supplied) (field supplied) Control line Bypass valve (field supplied) Hi-temp line Low-temp line...

  • Page 68: Pre-Installation

    Air-to-water Heat Pump Split Versati SPLIT TYPE CASE 3 : Connecting Sanitary Water Tank and Heat Emitters for Heating and Cooling Underfloor coil Radiator FCU2 FCU1 Outdoor unit Indoor unit Hot water Sanitary water tank City water Booster heater Remote room thermostat 2-way valve 3-way valve (field supplied) (field supplied)

  • Page 69: Outline Dimension Of Outdoor Unit

    Air-to-water Heat Pump Split Versati SPLIT TYPE 4.4 Outline dimension of outdoor unit (1) GRS-CQ8.0Pd/NaD-K(O),GRS-CQ10Pd/NaD-K(O) (2) GRS-CQ12Pd/NaD-M(O),GRS-CQ14Pd/NaD-M(O)

  • Page 70: Installation Clearance Data

    Air-to-water Heat Pump Split Versati SPLIT TYPE Unit: inch Name Remarks Liquid-side Service Valve GRS-CQ8.0/10Pd/NaD-K, GRS-CQ12/14Pd/NaD-M Gas-side Service Valve GRS-CQ8.0/10Pd/NaD-K, GRS-CQ12/14Pd/NaD-M Handle Used to cover or uncover the front case Air discharge Grill 4.5 Installation Clearance Data 2000 ＞ (1) When moving the outdoor unit, it is necessary to adopt 2 pieces of long enough rope to hand the unit from 4 directions.

  • Page 71: Installation Clearance Data

    Air-to-water Heat Pump Split Versati SPLIT TYPE Unit: inch Name Remarks Leaving Water Pipe 1″Male BSP Returning Water Pipe 1″Male BSP Gas-side Pipe GRS-CQ8.0/10Pd/NaD-K, GRS-CQ12/14Pd/NaD-M Liquid-side Pipe GRS-CQ8.0/10Pd/NaD-K, GRS-CQ12/14Pd/NaD-M 4.7 Installation Clearance Data 1300 (1) Indoor unit shall be vertically mounted on the wall of the room with expansion bolt. (2) Keep the indoor unit away from heat sources like heat sink and so on in the room as much as possible.

  • Page 72: Installation Of Protective Layer On The Connection Pipe

    Air-to-water Heat Pump Split Versati SPLIT TYPE Cut-off valve Cut-off valve Gas pipe Gas pipe Liquid pipe Liquid pipe Way 1 Cut-off valve Cut-off valve Gas pipe Gas pipe Liquid pipe Liquid pipe Way 2 Notes (a) When two cut-off valves are placed quite low, there is a risk of breaking off the refrigerant pipe once installed directly.
  • Page 73 Air-to-water Heat Pump Split Versati SPLIT TYPE No clearance Indoor unit Outdoor unit Indoor unit Outdoor unit Outdoor unit Indoor unit Oil trap Pipe size Length B Elevation A Additional (Diameter:Φ) Model refrigerant Liquid Standard Max. Standard Max. GRS-CQ8.0Pd/NaD-K 5/8" 3/8"...

  • Page 74: Electric Wiring

    Air-to-water Heat Pump Split Versati SPLIT TYPE Oil trap should be installed every 5-7 meters when the location of outdoor unit is higher than indoor unit. 4.10 Electric Wiring (1) Wiring diagram: indoor unit Wiring diagrams stuck to the unit always prevails. GRS-CQ8.0Pd/NaD-K(I),GRS-CQ10Pd/NaD-K(I) ◆...
  • Page 75 Air-to-water Heat Pump Split Versati SPLIT TYPE GRS-CQ12Pd/NaD-M(I),GRS-CQ14Pd/NaD-M(I) ◆ (2) Wiring diagram: outdoor unit GRS-CQ8.0Pd/NaD-K(O),GRS-CQ10Pd/NaD-K(O) ◆...

  • Page 76: Wiring Of The Terminal Board

    Air-to-water Heat Pump Split Versati SPLIT TYPE GRS-CQ12Pd/NaD-M(O),GRS-CQ14Pd/NaD-M(O) ◆ Power CODE NAME X5(L1-F) X1(L1-F) X1(AC-L1) 4-way valve coil X6(L2-F) X2(L2-F) COMP Compressor X2(AC-L2) X7(L3-F) X3(L3-F) Compressor band heater X3(AC-L3) X11(L1) X4(L1-1) Botton band heater X4(AC-N) X8(N-F) X5(L2-1) X9(E) EKV1 Electric expansion valve coil 1 X6(L3-1) EKV2 Electric expansion valve coil 2...

  • Page 77: Wiring Of The 2-Way Valve

    Air-to-water Heat Pump Split Versati SPLIT TYPE (2) GRS-CQ12Pd/NaD-M,GRS-CQ14Pd/NaD-M 4.12 Wiring of the 2-Way Valve The 2-way valve 1 is required to control water flow for cooling or heating operation. The role of 2-way valve 1 is to cut off water flow into the underfloor loop when the fan coil unit is equipped for cooling operation. General Information Type Power...

  • Page 78: Wiring Of Other Auxiliary Heat Sources

    Air-to-water Heat Pump Split Versati SPLIT TYPE WARNING (1) Normal Open type should be connected to wire (OFF) and wire (N) for valve closing in cooling mode. (2) Normal Closed type should be connected to wire (ON) and wire (N) for valve closing in cooling mode. (ON): Live signal (for Normal Open type) from PCB to 2-way valve (OFF): Live signal (for Normal Closed type) from PCB to 2-way valve (N): Neutral signal from PCB to 2-way valve...

  • Page 79: Wiring Of The Thermostat

    Air-to-water Heat Pump Split Versati SPLIT TYPE Remote Air Temperature Sensor 1.5 Meters Doors Remote Air Environmen t CN15 Temp sensor Electric box Notes: (a) Distance between the indoor unit and the remote air temperature sensor should be less than 15m due to length of the connection cable of remote air temperature sensor;...

  • Page 80: Wiring Of The Control

    Air-to-water Heat Pump Split Versati SPLIT TYPE CAUTION • Never use 230V AC and 24V AC thermostat at the same time, otherwise, it will cause short circuit and power cut-off by the circuit breaker; • Setting temperature by the thermostat(heating or cooling) should be within the temperature range of the product •...

  • Page 81: Commissioning And Trial Run

    Air-to-water Heat Pump Split Versati SPLIT TYPE 5 Commissioning and Trial Run 5.1 Check before Startup For safety of users and unit, the unit must be started up for check before debugging. The procedures are as below: The following items shall be performed by qualified maintenance personnel. Confirm together with the sales engineer, dealer, installing contractor and customers for the following items finished or to be finished.

  • Page 82: Trial Run

    Air-to-water Heat Pump Split Versati SPLIT TYPE 5.2 Trial Run Trial run is testing whether the unit can run normally via preoperation. If the unit cannot run normally, find and solve problems until the trial run is satisfactory. All inspections must meet the requirements before performing the trial run.

  • Page 83: Test Operation & Troubleshooting & Maintenance

    When there is any error, solve it according to the troubleshooting flowchart covered in this manual. However, if the troubleshooting flowchart is still unhelpful, please contact GREE sales agent. 2 Error Code List...
  • Page 84 Air-to-water Heat Pump Split Versati SPLIT TYPE Full Name Displayed Name Error Code Outdoor fan error Outdoor fan Compressor internal overload protection Comp. overload High pressure protection High pressure Low pressure protection Low pressure High discharge protection Hi-discharge Refrigerant loss protection Refri-loss Heat pump-water pump protection HP-pump...
  • Page 85 Air-to-water Heat Pump Split Versati SPLIT TYPE Full Name Displayed Name Error Code Desynchronizing Desynchronize Compressor stalling Comp. stalling Communication error drive-main com. Radiator or IPM or PFC module overtemperature Overtemp.-mod. Radiator or IPM or PFC module temperature sensor T-mod. sensor error Charging circuit error Charge circuit...

  • Page 86: Flow Chart Of Troubleshooting

    Air-to-water Heat Pump Split Versati SPLIT TYPE 3 Flow Chart of Troubleshooting 3.1 Comp High-pressure Protection E1 Comp High-pressure protection E1 Replace the High-pressure Check if the High-pressure switch switch is broken Check if the High-pressure switch Replace the wiring wiring is loose.

  • Page 87: Comp Low- Pressure Protection E3

    Air-to-water Heat Pump Split Versati SPLIT TYPE 3.2 Comp Low- pressure Protection E3 Comp Low-pressure Protection E3 Replace comp Check if comp low-pressure switch low- pressure or rewire is broken or the wiring is loose. Check the fans Check if the fans stop running or reverse Repair the leakage of system pipe and add refrigerant Check if the system has leaked...

  • Page 88: Overload Protection Of Compressor Or Driver Error

    Air-to-water Heat Pump Split Versati SPLIT TYPE 3.4 Overload Protection of Compressor or Driver Error Comp Overload Protection Check if the AC Replace the AC contactor contactor is damaged Adjust the Check if the compressor compressor wiring wiring is correct Contact the power Check if the voltage is normal supply company...

  • Page 89: Temperature Sensor Error

    Air-to-water Heat Pump Split Versati SPLIT TYPE 3.6 Temperature Sensor Error Temperature Sensor Error Check if the plug Check the orientation on temperature sensor is correctly of plug and socket connected to the socket. Check if the resistance of Replace the temperature sensor is correct.

  • Page 90: Capacity Switch Error (Code:"C5")

    Air-to-water Heat Pump Split Versati SPLIT TYPE 3.8 Capacity Switch Error (Code:"C5") C5 is displayed on the wired controller Is the jumper Connect the jumper connected ? Is the number Connect the right of the jumper jumper right ? Is the jumper Tighten the jumper loose ? Replace the...
  • Page 91 Air-to-water Heat Pump Split Versati SPLIT TYPE IPM or PFC Over-temperature Protection(Code:"P8") ◆ “Overtemp.-mod.” is displayed on the wired controller P8 is displayed in the mainboard 88 Indicating Lamp Is the IPM or PFC module of the driver board AP4 tightened ? Tighten the IPM or Replace the...
  • Page 92 Air-to-water Heat Pump Split Versati SPLIT TYPE Drive-to-main-control Communication Error(Code:"P6") ◆ “Drive-main com.” is Displayed on the wired controller P6 is displayed in the mainboard 88 Indicating Lamp Is the CPU tightened? Replace Tighten the CPU the driver board AP4 Work Normally Compressor Startup Failure(code:"LC") ◆...
  • Page 93 Air-to-water Heat Pump Split Versati SPLIT TYPE Compressor Current Protection (Code:"P5"); Compressor Motor Desynchronizing (Code:"H7"); IPM ◆ Protection (Code:"H5"); Phase Loss (Code:"LD") “Com. over-curr.”, “Desynchronize”, “IPM defective” or “Phase loss” is Displayed on the wired controller P5、H7、H5 or LD is displayed in the mainboard 88 indicating lamp Is the...

  • Page 94: Daily Maintenance And Repair

    Air-to-water Heat Pump Split Versati SPLIT TYPE 5 Daily Maintenance and Repair 5.1 Daily Maintenance In order to avoid damage of unit, all protecting devices in the unit had been set before outgoing, so the user can never adjust or remove them. For the first startup of the unit or next startup of unit after long-period stop (above 1 day) by cutting off the power, please electrify the unit in advance to preheat the unit for more than 8hr Never put sundries on the unit and accessories.

  • Page 95: Repair

    Air-to-water Heat Pump Split Versati SPLIT TYPE Malfunctions Reasons Troubleshooting 1.Enhance heat insulation efficiency of the 1.Poor heat insulation of water system. system. Poor efficiency of 2.Poor heat exchange of evaporator. 2.Check if air in or out of unit is normal and clean hot water heating 3.Poor refrigerant of unit.
  • Page 96 Air-to-water Heat Pump Split Versati SPLIT TYPE Picture Name Function It is used to prevent the heat exchanger from being frozen owing to reduced water flow rate. When the flow rate goes Flow Switch down to the point at which the flow switch will act, the switch will trip off and the unit will raise an alarm and shut down.
  • Page 97 Air-to-water Heat Pump Split Versati SPLIT TYPE With siphon tube No siphon tube...
  • Page 98 Add: West Jinji Rd, Qianshan, Zhuhai,Guangdong, China, 519070 Tel: (+86-756) 8522219 Fax: (+86-756) 8669426 E-mail: gree@cn.gree.com www.gree.com For continuous improvement in the products, Gree reserves the right to modify the product specification and appearance in this manual without notice and without incurring any oblication. JF00302841...

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