Cooper & Hunter Mini CHV5 Service Manual
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Cooper & Hunter Mini CHV5 Service Manual

Dc inverter vrf units
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CHV5 Mini DC INVERTER VRF UNITS
Thank you for choosing Cooper&Hunter VRF CHV5, please read this service manual carefully
before operation and retain it for future reference.
CHV5 Mini DC INVERTER
VRF UNITS
Service manual
Models:
CHV-5S120NK2
CHV-5S140NK2
CHV-5S160NK2
CHV-5S120NM2
CHV-5S140NM2
CHV-5S160NM2

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Summary of Contents for Cooper & Hunter Mini CHV5

  • Page 1 CHV5 Mini DC INVERTER VRF UNITS Service manual CHV5 Mini DC INVERTER VRF UNITS Models: CHV-5S120NK2 CHV-5S140NK2 CHV-5S160NK2 CHV-5S120NM2 CHV-5S140NM2 CHV-5S160NM2 Thank you for choosing Cooper&Hunter VRF CHV5, please read this service manual carefully before operation and retain it for future reference.

  • Page 2: Table Of Contents

    CONTENTS PRODUCT ............................1 1 PRODUCT LIST ............................1 2 NOMENCLATURE ............................. 2 2.1 Nomenclature of outdoor units ........................2 3 PRODUCT FEATURES ..........................2 3.1 General introduction ............................. 2 3.2 Features................................2 4 SPECIFICATIONS ............................. 3 4.1 Specifications .
  • Page 3 ......................... 9 1 5 REMOVAL OF PARTS 5.1 Key parts ................................ 9 1 5.2 Removal of key parts ..........................9 3 6 COMMON MAINTENANCE ........................1 04 6.1 Vacuum drying for the system ....................... 1 04 6.2 Fill and charge refrigerant .

  • Page 4: Product

    DC INVERTER VRF SYSTEM II SERVICE MANUAL(R410A) PRODUCT...

  • Page 5: Product List

    C&H DC Inverter Multi VRF System II Service Manual PRODUCT 1 Product List Cooling Heating Power Model Capacity Capacity Refrigerant Appearance Supply (kW) (kW) CHV-5S120NK2 12.1 14.0 220-240V 50Hz R410A CHV-5S140NK2 14.0 16.5 208-230V 60Hz CHV-5S160NK2 16.0 18.0 CHV-5S120NM2 12.1 14.0 380-415V 3N~50Hz...

  • Page 6: Nomenclature

    C&H DC Inverter Multi VRF System II Service Manual 2 Nomenclature 2.1 Nomenclature of outdoor units □ □ □ □ Description Options Product code CHV-Cooper&Hunter Multi VRF Units Code of cooling capacity Nominal capacity/100(W) N – R410A Refrigerant K – 220-240V 50Hz Export Named in order 1, 2, 3…...

  • Page 7: Specifications

    C&H DC Inverter Multi VRF System II Service Manual Through a series of optimized measures, system has reduced the throttle noise and oil return noise of indoor units, gas bypass noise, etc. so that units are more comfortable regarding sound quality.

  • Page 8: Operation Range

    C&H DC Inverter Multi VRF System II Service Manual 4.2 Operation range Cooling Outdoor temperature: -5℃～52℃ Heating Outdoor temperature: -20℃～27℃ 5 Product Capacity Correction 5.1Correction factor of indoor and outdoor temperature 1）Correction factor of cooling capacity 2）Correction factor of heating capacity...

  • Page 9: Correction Factor Of Pipe Length And Height Difference

    C&H DC Inverter Multi VRF System II Service Manual 5.2 Correction factor of pipe length and height difference  Symbol description: Hp: Height difference in case indoor unit is below outdoor unit (m); Hm: Height difference in case indoor unit is above outdoor unit (m); L: Length of one-way equivalent pipe ...

  • Page 10: Principal Of Operation

    C & H DC Inverter Multi VRF System II Service Manual 6 Principal of Operation Components in flowcharts are presented according to the following table: Name Compressor 4-way valve Cut-off valve One-way valve Capillary tube Symbol Gas-liquid Pressure Pressure Axial-flow finned heat Electronic expansion Name separator...
  • Page 11 C&H DC Inverter Multi VRF System II Service Manual In cooling, the low-temperature and low-pressure refrigerant gas from each indoor heat exchanger will be merged and inhaled by the compressor and then become high-temperature and high-pressure gas, which will later be discharged into outdoor heat exchangers. By exchanging heat with outdoor air, refrigerant will turn to liquid and flow to each indoor unit via Y-type branch or manifold.

  • Page 12: Control

    C&H DC Inverter Multi VRF System II Service Manual CONTROL...

  • Page 13: Units' Control

    C&H DC Inverter Multi VRF System II Service Manual CONTROL 1 Units’ Control 1.1 Schematic diagram of units’ control 1.2 Interpretation on the schematic diagram ◆ High pressure switch is used to identify system’s high and low pressure. When pressure is too high, the switch will break off and send a signal to main board.

  • Page 14: Monitoring Software

    C&H DC Inverter Multi VRF System II Service Manual 3 Monitoring Software 3.1 Function introduction With the rapid development of building complex, more and more central air conditioners in various models are used in different places, resulting in inconvenience for the management of air conditioners. Integrating with telecommunication technology and computing software, C&H Commissioning Tool Kits can realize the comprehensive monitor, control and commissioning on central air conditioners.

  • Page 15: Parts Introduction

    C&H DC Inverter Multi VRF System II Service Manual kits. In a single-system network, both indoor units and outdoor units can be connected, while in a multi-system network, only the master outdoor unit can be connected. 3.3 Parts introduction 3.3.1 List of parts Name Model Material no.
  • Page 16 C&H DC Inverter Multi VRF System II Service Manual 3.3.2.3 Operation instruction  Power LED: a red light. If the red light is on, it indicates normal power supply. If the red light is off, it indicates the power supply of converter is not normal. ...
  • Page 17 C&H DC Inverter Multi VRF System II Service Manual  HBS interface: When HBS converter is under HBS communication mode, connect air conditioner’s HBS data interface. HBS interface exhibits no polarity (This interface is not yet available for C& debugger and the monitoring software). ...
  • Page 18 C&H DC Inverter Multi VRF System II Service Manual Board Connection Wire 3.4 Software introduction （1）One-button commissioning Personnel responsible for the commissioning of air conditioners can start commissioning by pressing one button according to the commissioning logic of software, which will give the commissioning order to units.
  • Page 19 C&H DC Inverter Multi VRF System II Service Manual 3.4.1 Software installation 3.4.1.1 Installation requirements （1）Computer Configuration 1 GB at least Memory 2 GB or above is preferred Hard Disc 10 GB available Core 2 or higher 1 GHz at least 2 GHz or above is preferred Windows Server 2003 SP3 or higher Windows XP SP3 or higher...
  • Page 20 C&H DC Inverter Multi VRF System II Service Manual 3.4.1.2 Installation flowchart Button Graphics This flowchart describes basically the software installation process. See below for details. 3.4.1.3 Installation process (1) Install .Net Framework 4.0  If your computer has installed .Net Framework 4.0 or versions above, there’s no need to install again.
  • Page 21 C&H DC Inverter Multi VRF System II Service Manual  Extracting files  Click and select “I have read and accept the license terms”. Then click “Install”.
  • Page 22 C&H DC Inverter Multi VRF System II Service Manual  Installation is in progress.  Click “Finish” to complete the installation.
  • Page 23 C&H DC Inverter Multi VRF System II Service Manual (2) Install Access Driver  Before operating C&H commissioning software, please first install Access Driver (necessary for versions below OFFICE 2007). Click “Install Access Driver”.  Click ”Next”.
  • Page 24 C&H DC Inverter Multi VRF System II Service Manual Tick “I accept the terms in the License Agreement” and then click “Next”   Click “Browse” to change the default folder to the expected one, or click “Install” to continue the installation.
  • Page 25 C&H DC Inverter Multi VRF System II Service Manual  Installation is in progress.  Click “Ok” to complete the installation. (3) Install C&H Debugger  Before installing C&H debugger, make sure that your computer is installed with .Net Framework 4.0 or versions above.
  • Page 26 C&H DC Inverter Multi VRF System II Service Manual  Click “Next”.  Click “Browse” to select installation folder. If no change is needed for the folder, click “Next” to continue the installation.
  • Page 27 C&H DC Inverter Multi VRF System II Service Manual  Click “Next”.  Installation is in progress.
  • Page 28 C&H DC Inverter Multi VRF System II Service Manual  Click “Close” to complete the installation. (4) Install USB Converter Driver  If USB converter driver is already installed in your computer, this part can be skipped. Otherwise, click “Install USB Converter Driver”.
  • Page 29 C&H DC Inverter Multi VRF System II Service Manual  Then the following installation window will be shown.  This window will exit after installation is finished.
  • Page 30 C&H DC Inverter Multi VRF System II Service Manual (5) Install C&H USB Data Converter  If converter baud rate is needed to be set, then converter configuring software must be installed. Click “Install C&H USB Data Converter”.  Then select the setup language. You can choose Chinese ”simplified”, Chinese “traditional” or English.
  • Page 31 C&H DC Inverter Multi VRF System II Service Manual  Click “I accept the agreement”. Then click “Next” to continue installation.  Click “Browse” to select your expected installation folder. Click “Next” to continue.
  • Page 32 C&H DC Inverter Multi VRF System II Service Manual  Click “Browse” to change folder. Click “Next” to continue.  If you want to create s desktop shortcut, tick “Creat a desktop icon”. Then click “Next” to continue.
  • Page 33 C&H DC Inverter Multi VRF System II Service Manual  Destiniation location, folder and additional task will be shown in the next step. If you need to change any of it, please click “Back”. If not, click “Install” to start installation. ...
  • Page 34 C&H DC Inverter Multi VRF System II Service Manual  Click “Finish” to complete the installation. 3.4.2 Data monitoring  Start up C&H Debugger.  On the original interface, user can select language and units system. Click “OK” to confirm the defaulted language and units system and start up the software.
  • Page 35 C&H DC Inverter Multi VRF System II Service Manual  Select language.  Select system of units.  If units you want to monitor are already connected, and able to communicate normally, with correct COM and protocal, then you may click “Connect” to enter the interface of numbers. Otherwise, connect in accordance with the connection diagram shown below.
  • Page 36 C&H DC Inverter Multi VRF System II Service Manual  COM selection: the serial port in your computer can be detected automatically. You just need to select your desired serial port.
  • Page 37 C&H DC Inverter Multi VRF System II Service Manual  Protocal selection: This is to select the communication method of your units. Currently, CAN is applicable to the units.
  • Page 38 C&H DC Inverter Multi VRF System II Service Manual  After the selection, click “Connnect”. If units can communicate normally with computer, then the interface of numbers will be shown soon. Otherwise, “Connecting” will be shown.
  • Page 39 C&H DC Inverter Multi VRF System II Service Manual  There are several display zones on this interface. You can hide devices information and system information by clicking devices information icon and system icon . Display zones of indoor unit information and errors can be dragged up and down at the dividing lines. As to the display zone of outdoor modules information, it can show information of only one module and hide information of others (two modules are defaulted to be shown).
  • Page 40 C&H DC Inverter Multi VRF System II Service Manual 3.4.3 Project debugging  Click icon of “Debug” on the menu bar and the interface will be switched to project debugging, where auto debugging will be started from up to down and from left to right. Note: Debugging function is only applicable to a single-system network.
  • Page 41 C&H DC Inverter Multi VRF System II Service Manual  If “OK” button is displayed, it means user needs to judge whether to continue debugging or not. and relevant information will be shown for your reference. Click “Close” to close the Click icon pop-up (For No.3 Confirm ODU Basic Module NO.
  • Page 42 C&H DC Inverter Multi VRF System II Service Manual During debugging, a click on “Break” can stop debugging. Click “Start” to resume debugging and  then debugging will be finished step by step. For No.10 ODU Valves Check Before Startup, there are “Back”...
  • Page 43 C&H DC Inverter Multi VRF System II Service Manual 3.4.4 Control units  Click icon of “Setting” on menu bar and select parameter settings, which include “Gateway Settings”, “IDU Settings”, “System Settings”, “Project Number Conflict (In case there is project number conflict in indoor units, other functions will be shielded.
  • Page 44 C&H DC Inverter Multi VRF System II Service Manual  Tick the indoor units that need setting in the IDU selection zone or you may click “Select All” to select all of them or “Select Inverted” to select none of them. After selection, the current values of the corresponding parameters will be displayed in the zone of settings.
  • Page 45 C&H DC Inverter Multi VRF System II Service Manual 3.4.5 Other functions Capture screen  Click icon of “Capture Screen” to print the interface. If you want to open the interface, click “Open”.
  • Page 46 C&H DC Inverter Multi VRF System II Service Manual Search for database folder  Click icon of “Open Data Folder” on the menu bar to open database folder. Conversion of pressure value  Click icon of “Others” on the menu bar and then click “Display Settings” to select “High Low Pressure Value”...
  • Page 47 C&H DC Inverter Multi VRF System II Service Manual displayed on the interface will be temperature. Select “Pressure” and the pressure parameter displayed on the pressure interface will be pressure. Refrigerant type will affect the pressure parameter displayed on the interface. Database saving of multiple systems ...
  • Page 48 C&H DC Inverter Multi VRF System II Service Manual Change database saving path and rebuild database  Change of database saving path and rebuilding of database should be set before the software starts monitoring (see below interface). Click “Change database saving path” and click “Browse” to change the saving path.
  • Page 49 C&H DC Inverter Multi VRF System II Service Manual 3.4.6 Usage of USB Converter Usage of converter  C&H commissioning software should be connected with CAN interface when converter is used. For air conditioners with a single system, connect D1 and D2 interfaces of the wiring board. For air conditioners with multiple systems, connect G1 and G2 interfaces of the wiring board.
  • Page 50 C&H DC Inverter Multi VRF System II Service Manual  C&H monitoring software should be connected with RS485 interface when converter is used. Connect outdoor or indoor units or the mainboard of wired controller according to actual needs.  HBS, CAN and RS485 of the converter can be switched by buttons. Press the button “SET” on the converter to realize the conversion among HBS, CAN and RS485 interfaces.
  • Page 51 C&H DC Inverter Multi VRF System II Service Manual Step 3: Right-click ”USB Serial Port (COM6) and then click ”Properties”. The dialog box of properties will then pop up.
  • Page 52 C&H DC Inverter Multi VRF System II Service Manual Step 4: Then click ”Port Settings” in the dialog box.
  • Page 53 C&H DC Inverter Multi VRF System II Service Manual Step 5: Click ”Advanced” and then a new dialog box will pop up. Find the ”Serial Enumerator” in the miscellaneous options and cancel the tick. Click ”OK” to exit.
  • Page 54 C&H DC Inverter Multi VRF System II Service Manual Usage of converter configuring software:  When the converter is working, hold the button ”SET” for 5 sec. Function LED will be flickering, indicating that the converter has enter the baud rate setting mode. Then you can use the converter configuring software to set the baud rate of converter.
  • Page 55 C&H DC Inverter Multi VRF System II Service Manual Baud rate look-up table for HBS interface (unit: bps) 9600 19200 57600 HBS interface 38400 9600 19200 USB interface 4800 38400 Baud rate look-up table of CAN interface (unit: bps) 20000 50000 100000 125000...
  • Page 56 C&H DC Inverter Multi VRF System II Service Manual  Select the function that is to be set and the corresponding baud rate (refer to the look-up table) in the “Converter Setup”.Then click “Set”.  If you want to restore ex-factory settings, click “Default” to restore the default settings.
  • Page 57 C&H DC Inverter Multi VRF System II Service Manual  Click “Get” to get the current setting details of converter.  Switchover of Software Languages...

  • Page 58: Installation

    C&H DC Inverter Multi VRF System II Service Manual INSTALLATION...

  • Page 59: Engineering Installation Preparation And Notice

    C&H DC Inverter Multi VRF System II Service Manual INSTALLATION 1 Engineering Installation Preparation and Notice 1.1 Installation notice Personnel and property safety are highly concerned during the entire installation process. Installation implementation must abide by relevant national safety regulations to ensure personnel and property safety.

  • Page 60: Installation Materials Selection

    C&H DC Inverter Multi VRF System II Service Manual Installation Problem Possible Consequence The ratio of slop for condensate water pipe is insufficient or the Reverse slop or inconsistent connection of condensate water pipe can hinder the condensate water pipe is smooth drainage and cause leakage of the IDU.

  • Page 61: Condensate Water Pipe

    C&H DC Inverter Multi VRF System II Service Manual e. Specifications requirement R410A Refrigerant System OD (mm/inch) Wall Thickness (mm) Model Ф6.35(1/4) ≥0.8 Ф9.52(3/8) ≥0.8 Ф12.70(1/2) ≥0.8 Ф15.9(5/8) ≥1.0 Ф19.05(3/4) ≥1.0 Ф22.20(7/8) ≥1.2 Ф25.40(8/8) ≥1.2 f. After the inner part of the copper pipe is cleaned and dried, the inlet and outlet must be sealed tightly by using pipe caps, plugs or adhesive tapes.

  • Page 62: Power Cable

    C&H DC Inverter Multi VRF System II Service Manual Communication cable selection for IDU and wired controller Total Length of Communication Cables Number of Wire Pieces Wire Type Wire Standard Remark of the IDU and Wired x Wire Diameter (mm Controller L(m) Common sheath The overall...

  • Page 63: Installation Notices

    C&H DC Inverter Multi VRF System II Service Manual 3.4 Installation notices In order to ensure proper operation, the selection of installation site must conform to the following principle: ●The discharged air of outdoor unit will not flow back and there is sufficient space around the unit for maintenance;...

  • Page 64: Installation Space Requirement

    C&H DC Inverter Multi VRF System II Service Manual Model CHV-5S120NK2 CHV-5S140NK2 CHV-5S160NK2 1345 CHV-5S120NM2 CHV-5S140NM2 CHV-5S160NM2 3.7 Installation space requirement If all sides of the ODU (including the top) are surrounded by walls, process according to the following requirements for installation space:...

  • Page 65: Debugging &Maintenance

    C&H DC Inverter Multi VRF System II Service Manual DEBUGGING &MAINTENANCE...

  • Page 66: Debugging Of Unit

    DC INVERTER VRF SYSTEM II SERVICE MANUAL(R410A) DEBUGGING &MAINTENANCE 1 Debugging of Unit Caution: 1. After the initial installation is finished and the main board of outdoor unit is replaced, it must perform debugging. Otherwise, the unit can’t operate. 2. The debugging must be performed by professional person or under the the guide of professional person.

  • Page 67: Debugging Of Unit

    C&H DC Inverter Multi VRF System II Service Manual 1.2 Debugging of unit Debugging procedure for test run, display instruction for indicator on main board of outdoor unit and operation method are as below: CHV-5S120NK2, CHV-5S140NK2, CHV-5S160NK2, CHV-5S120NM2, CHV-5S140NM2, CHV-5S160NM2, Stage process instruction for debugging ——...
  • Page 68 C&H DC Inverter Multi VRF System II Service Manual Stage process instruction for debugging —— Debugging code Process code Status code LED1 LED2 LED3 Code instruction and operation method Process Display Display Display Code Code Code status status status Confiration for the quantity of indoor unit of finished.
  • Page 69 C&H DC Inverter Multi VRF System II Service Manual Stage process instruction for debugging —— Debugging code Process code Status code LED1 LED2 LED3 Code instruction and operation method Process Display Display Display Code Code Code status status status confirm that the preheat time is reached to 8h and then enter into the next determination.
  • Page 70 C&H DC Inverter Multi VRF System II Service Manual Stage process instruction for debugging —— Debugging code Process code Status code LED1 LED2 LED3 Code instruction and operation method Process Display Display Display Code Code Code status status status Corre There’s malfunction during debugging process spodi under cooling mode.

  • Page 71: Parameters Reference Value For The Normal Operation Of Unit

    C&H DC Inverter Multi VRF System II Service Manual 1.3 Parameters reference value for the normal operation of unit Debugging project Parameters name Unit Reference value Outdoor ambient —— ℃ temperature ●After compressor is started up, normal discharge temperature for cooling is 70~105℃, which is 10℃ above Discharge more than the high pressure saturation temperature.
  • Page 72 C&H DC Inverter Multi VRF System II Service Manual Debugging project Parameters name Unit Reference value Ambient ℃ —— temperature for indoor unit Entry tube ●According to the difference of ambient temperature, the temperature for ℃ entry tube temperature is 1℃~7℃ lower than the exit tube indoor heat temperature for the same indoor unit under cooling mode;...

  • Page 73: Malfunction List

    C&H DC Inverter Multi VRF System II Service Manual 2 Malfunction List 2.1 Malfunction list for the wired controller Display Display Display Content Content Content code code code Wrong number of indoor Malfunction of Malfunction of water unit for one-to-more indoor indoor unit temperature sensor unit...

  • Page 74: Status Display Table For Indicators On Main Board Of Outdoor Unit

    C&H DC Inverter Multi VRF System II Service Manual 2.2 Status display table for indicators on main board of outdoor unit Definition:  LED1: It displays “00” for hot water mode as for DC Inverter Side Discharge VRF  LED2: It displays “AC” for AC mode, cooling and cooling OFF mode for indoor unit, and displays “AH”...
  • Page 75 C&H DC Inverter Multi VRF System II Service Manual Display Display Display Content Content Content code code code operation outdoor unit and wired controller of indoor unit Driven communication Driven communication malfunction between malfunction between main Malfunction of indoor main board and inverter board and inverter unit-lacking compressor...
  • Page 76 C&H DC Inverter Multi VRF System II Service Manual compulsory defrosting (n3) After selecting relevant functions, press SW7 to confirm and start setting this function. Main board of outdoor unit will display as below: LED1 LED2 LED3 Function code Display Current progress Display Current status...
  • Page 77 C&H DC Inverter Multi VRF System II Service Manual 2.3.2 Cool & Heat Function This function can set operation modes and prevent mode collision that is caused by setting different modes for different indoor units. It is especially suitable for hotels and other small business areas. There are 3 levels for this setting: Level A—Mode Lock Control Upon entering this function setting, main board of outdoor unit will display as below:...
  • Page 78 C&H DC Inverter Multi VRF System II Service Manual 2.3.3 Forced Defrosting This function can only be set when outdoor compressor is running. Upon entering this function, main board of outdoor unit will display as below: LED1 LED2 LED3 Function code Display Current progress/mode Display...
  • Page 79 C&H DC Inverter Multi VRF System II Service Manual Function code Display 00~12 Notice: code 00 of LED refers to normal mode. Codes 01~09 refer to smart night silent mode. Codes 10~12 refer to compulsory silent mode. When setting is finished, master unit will memorize it so that it can’t be cancelled even when power is on or off.
  • Page 80 C&H DC Inverter Multi VRF System II Service Manual When applicable mode is selected, press SW3 to confirm. The related display is as below: Function code Display This setting will be memorized by master unit and can’t be cancelled even when power is on or off. Then press SW4on the master unit to return to the previous step.
  • Page 81 C&H DC Inverter Multi VRF System II Service Manual on the main board of ODU for more than 10s, then all LEDs will blink for 5s. All settings are cleared out, including the IP addresses and project codes of IDU and ODU. The mark for finished debugging remains the same.

  • Page 82: Troubleshooting

    C&H DC Inverter Multi VRF System II Service Manual 3 Troubleshooting Troubleshooting principle 1) Communication malfunction Communication malfunction Check whether indoor unit and Energize indoor unit and outdoor unit is power supplied outdoor unit Check whether the Connect the communication communication wire between wire for indoor unit and indoor unit and outdoor unit is...
  • Page 83 C&H DC Inverter Multi VRF System II Service Manual 2) High pressure protection High pressure protection Measure whether Replace main Measure whether the high pressure the pressure board of outdoor is too high with manometer switch is normal unit Replace pressure switch Charge refrigerant according to the volume on Check whether the refrigerant-...
  • Page 84 C&H DC Inverter Multi VRF System II Service Manual 3) Low-pressure protection Low pressure protection Measure Replace main whether the Measure whether the low pressure board of outdoor is too low with manometer pressure switch unit is normal Replace pressure switch Charge refrigerant according to the volume Check whether the refrigerant- on nameplate;...
  • Page 85 C&H DC Inverter Multi VRF System II Service Manual 4) Discharge temperature protection Discharge temperature protection Measure whether the Replace main board of resistance valve for Check whether the discharge temperature for compressor is temperature sensor is outdoor unit reached to 113℃ normal Replace discharge temperature sensor...
  • Page 86 C&H DC Inverter Multi VRF System II Service Manual 5) Mafunction of temperature sensor Malfunction of temperature sensor Conform whether the Whether the plug of temperature is plug is connected connected with the plug of main board correctly correctly Replace temperature Measure whether resistance value of temperature sensor is in the normal range sensor...
  • Page 87 C&H DC Inverter Multi VRF System II Service Manual 8) Failure start-up Failure start-up for consecutive 6 times Work normally after replacing main board? Replace compressor and Work normally liquid gas separator 9) Reset protection for drive module of compressor, drive PFC protection for compressor, malfunction of drive temperature sensor for compressor, circuit malfunction of drive current detection for compressor Wired controller...
  • Page 88 C&H DC Inverter Multi VRF System II Service Manual 11) Desynchronizing protection for inverter compressor Wired controller displays P0 LED3 dual-8 nixie tube displays P9 Whether the Adjust the sequence of wire sequence of wire for compressor is for compressor correct? Connect the wires Whether...
  • Page 89 C&H DC Inverter Multi VRF System II Service Manual 13) Loop malfunction of driven charging for compressor Wired controller displays P0 LED3 dual-8 nixie tube displays PF Check whether the wires for PFC induction is correct/ Replace main Reinsert the board wires for PFC Work normally...
  • Page 90 C&H DC Inverter Multi VRF System II Service Manual 15) Overcurrent protection for inverter compressor, IPM module protection, phase-lacking of inverter compressor Wired controller displays P1 LED3 dual-8 nixie tube displays P5、P6 or PE Whether the sequence of wire Adjust the sequence of for compressor is wire for compressor correct?
  • Page 91 C&H DC Inverter Multi VRF System II Service Manual 17) AC current protection for inverter compressor 18) Communication malfunction between main contoller and driver of inverter compressor Wired controlled displays C2 LED3 dual-8 nixie tube displays C2 Check whether the main control CPU board is inserted well?

  • Page 92: Power Distribution Of Unit

    C&H DC Inverter Multi VRF System II Service Manual 4 Power Distribution of Unit 4.1 Power distribution of unit The control logical relationship among parts inside the electric box of unit is showed by the mongline diagram (CAD source file). The main loop is showed by bold line (line width: 1mm);...

  • Page 93: Circuit Diagram

    C&H DC Inverter Multi VRF System II Service Manual Name Photo Function introduction Four diodes and two MOS pipe are intergrated inside the PFC module. It will transform AC PFC module input power into DC power. Meanwhile, MOS pipe is controlled by PWM wave. Pressure will be increased by induction.
  • Page 94 C&H DC Inverter Multi VRF System II Service Manual CHV-5S120NM2, CHV-5S140NM2, CHV-5S160NM2...

  • Page 95: Removal Of Parts

    C&H DC Inverter Multi VRF System II Service Manual 5 Removal of Parts 5.1 Key parts Photo Name Function Core part of air conditioning system. It sucks low temperature and low pressure gas, compress it to high compressor temperature and high pressure gas, and then discharge Electronic Throttling device.
  • Page 96 C&H DC Inverter Multi VRF System II Service Manual Photo Name Function It stays between outlet of evaporator and suction ouitlet Vapour liquid of compressor. It used for separating low temperature separator and low pressure refrigerant. High pressure It used for storing the superfluous high pressure liquid refrigerant liquid during cooling process.

  • Page 97: Removal Of Key Parts

    C&H DC Inverter Multi VRF System II Service Manual 5.2 Removal of key parts 5.2.1 C H V- 5S 120N K2 , C H V- 5S 140N K2 , C H V- 5S 160N K2 ， C H V- 5S 120N M2 , C H V- 5S 140N M2 , C H V- 5S 160N M2 series unit Removal operation for panel Remark: Before removing the panel, please make sure that the unit is disconected with the power Process...
  • Page 98 C&H DC Inverter Multi VRF System II Service Manual Removal operation for panel Remark: Before removing the panel, please make sure that the unit is disconected with the power Process Photo Operation Instruction ● Loose the screws fixing the front 3)Remove front panel and grille with screwdriver ●...
  • Page 99 C&H DC Inverter Multi VRF System II Service Manual Removal operation for blade Remark: Before removing the motor, please make sure that the unit is disconnected with the power. Process Photo Operation Instruction ● Loosen nuts fixing the blade with wrench 2) Remove ●...
  • Page 100 C&H DC Inverter Multi VRF System II Service Manual Removal operation for blade Remark: Before removing the motor, please make sure that the unit is disconnected with the power. Process Photo Operation Instruction ● Assemble the unit in 5) Assemble unit the the converse sequence Removal operation of compressor...
  • Page 101 C&H DC Inverter Multi VRF System II Service Manual Removal operation of compressor Remark: Before removing the compressor, please make sure that there’s no refrigerant inside the pipeline and the power is disconnected. Process Photo Operation Instruction 3) Loose nuts Twist off the nuts for fixing the foot of compressor with...
  • Page 102 C&H DC Inverter Multi VRF System II Service Manual Removal operation of compressor Remark: Before removing the compressor, please make sure that there’s no refrigerant inside the pipeline and the power is disconnected. Process Photo Operation Instruction Weld the connection pipe of compressor, 6) Connect suction connect the pipeline...
  • Page 103 C&H DC Inverter Multi VRF System II Service Manual Removal operation for 4-way valve Remark: Before removing the 4-way valve, please make sure that there’s no refrigerant inside the pipeline of system and then power is disconnected. Process Photo Operation Instruction 1)Disconnect ●Remove the coil of the coil of 4-way...
  • Page 104 C&H DC Inverter Multi VRF System II Service Manual Removal operation for 4-way valve Remark: Before removing the 4-way valve, please make sure that there’s no refrigerant inside the pipeline of system and then power is disconnected. Process Photo Operation Instruction ●...
  • Page 105 C&H DC Inverter Multi VRF System II Service Manual Remival operation for eletronic expansion valve Remark: Before removing the electronic expansion valve, please make sure that there’s no refrigerant in th pipeline of system and the power is disconnected Process Photo Operation Instruction ●...
  • Page 106 C&H DC Inverter Multi VRF System II Service Manual Removal operation of gas liquid separator Remark: Before removing the gas liquid separator, please make sure that there’s no refrigerant inside the pipeline of system and disconnect the power Process Photo Operation Instruction ●...
  • Page 107 C&H DC Inverter Multi VRF System II Service Manual Removal operation for plate heat exchanger Remark: Before removing the plate heat exchanger, please make sure that there’s no refrigerant inside the pipeline of system and disconnect the power Process Photo Operation Instruction ●...

  • Page 108: Common Maintenance

    C&H DC Inverter Multi VRF System II Service Manual 6 Common Maintenance 6.1 Vacuum drying for the system 6.1.1 Selection requirement for the vaccum pump Do not use different vacuum pump for vaccum-pumping for different refrigerant system； The final vacuum for the vacuum pump should reach -0.1Mpa; The air discharge volume for the vacuum pump should reach 4L/S above;...

  • Page 109: Fill And Charge Refrigerant

    C&H DC Inverter Multi VRF System II Service Manual 6.2 Fill and charge refrigerant 6.2.1 Filling procedure of regrigerant （1） Calculate the additional volume of refrigera（CHV-5S120NK2、 CHV-5S140NK2、CHV-5S160NK2、CHV-5S120NM2、CHV-5S140NM2, CHV-5S160NM2） 1) Refrigerant quantity of outdoor unit before delivery: CHV-5S120NK2 CHV-5S140NK2 CHV-5S160NK2 CHV-5S120NM2 CHV-5S140NM2 CHV-5S160NM2 Note: ①...
  • Page 110 C&H DC Inverter Multi VRF System II Service Manual 3) Calculation example IDU ① IDU ② IDU ③ IDU ④ Duct type Duct type Duct type Duct type Model CHV-5S71NK CHV-5S50NK CHV-5S36NK CHV-5S25NK Liquid pipe: Φ9.52 Φ9.52 Φ9.52 Φ6.35 Pipe size Length Φ9.52 Φ6.35...

  • Page 111: Airtightness Test

    C&H DC Inverter Multi VRF System II Service Manual 6.3 Airtightness test 6.3.1 Importance of airtightness test The airtightness of VRF system is the leak tightness of the pipeline for refrigerant, which the guarantee for safe and reliable operation. The leakage of refrigerant may affect the operation of air conditioner seriously, or even damage compressor and then lead to breakdown of system.

  • Page 112: Exploded View Of Unit And Parts' List

    C&H DC Inverter Multi VRF System II Service Manual 7 Exploded View of Unit and Parts’ List 7.1 Exploed view for outdoor unit and parts’ list 1) Model: CHV-5S120NK2、CHV-5S140NK2、CHV-5S160NK2 Exploded view CHV-5S120NK2、CHV-5S140NK2、CHV-5S160NK2 Name of Part Quantity Front Grill Cabinet Handle Front Side Plate Diversion Circle Axial Flow Fan...
  • Page 113 C&H DC Inverter Multi VRF System II Service Manual CHV-5S120NK2、CHV-5S140NK2、CHV-5S160NK2 Name of Part Quantity Compressor and Fittings Strainer 4-way Valve Strainer Electromagnetic Valve Nozzle for Adding Freon Electronic Expansion Valve Discharge Charge Valve Plate-type Heat Exchanger Electronic Expansion Valve Discharge Charge Valve Front Connection Board Right Connection Board Rear Side Plate Sub-Assy...
  • Page 114 C&H DC Inverter Multi VRF System II Service Manual 2) Model: CHV-5S120NM2、CHV-5S140NM2、CHV-5S160NM2 Exploded view CHV-5S120NK2,CHV-5S140NK2,CHV-5S160NK2 Name of Part Quantity Front Grill Handle Diversion Circle Cover Front Side Plate Axial Flow Fan 4-way Valve Small Valve Strainer Electric Expand Valve Fitting Discharge Charge Valve Oil Separator Nozzle for Adding Freon...
  • Page 115 C & H DC Inverter Multi VRF System II Service Manual CHV-5S120NK2,CHV-5S140NK2,CHV-5S160NK2 Name of Part Quantity Strainer Strainer Magnet Coil Rear Side Plate Sub-Assy Pressure Sensor(Low) Strainer Rear Grill Condenser Electric Box Assy Terminal Board Terminal Board Main Board Inductance Brushless DC Motor Electric Box Assy Main Board...

This manual is also suitable for:

Chv-5s120nk2Chv-5s140nk2Chv-5s160nk2Chv-5s120nm2Chv-5s140nm2Chv-5s160nm2

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