YMGI VRUO-2436HP-U2B(54) Service Manual
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YMGI VRUO-2436HP-U2B(54) Service Manual

Dc inverter split type heat pump outdoor condensing unit
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DC INVERTER SPLIT TYPE HEAT PUMP (Down to -22°F Ambient)
Model Numbers:
VRUO-2436HP-U2B(54)
VRUO-4860HP-U2B(54)
Thermostat-Controlled
Universal Outdoor
Condenser Works With:
1. Any Brand of American
Style Indoor Units, and
2. YMGI Indoor Unit
Universal VRUI
Thank you for choosing this YMGI product. Please read the owner's manual carefully before installation and operation, and retain for your
records and future reference. If you need a replacement copy, please contact your local agent or visit www.ymgigroup.com to download
a current electronic version.
This product is designed and manufactured to be free from any defects in material and workmanship during normal use and
maintenance. Installation, operation, maintenance and repair must follow all standards and professional practices for regular cooling
and heating equipment, such as NEC, State, or Local Codes and all related documents/manuals provided by YMGI. Failure to follow
and adhere to all codes and documentation can cause damage to equipment, property even personal injury.
Installer: Currently licensed/certified HVAC technicians only. Must Read the manual and all provided documents prior to installation.
Complete and fill out all required information on the warranty registration card.
User: Retain this manual and all supplied documents for your records and future reference.
Servicer: Use this manual for information concerning servicing and maintenance of this product.
Only qualified technicians should install and service this equipment. The installation, startup, operation and servicing of this equipment
can be hazardous and requires a HVAC professional who has been trained, licensed and certified. Installations, adjustments or any
equipment alterations done by an unqualified person could result in serious injury and even death. When working on the equipment,
observe all precautions in the provided documents, on the tags, stickers, and labels that are attached to or placed on the equipment.
YMGI, Engineered Comfort Products for A Sustainable
and Efficient Green World!
SERVICE MANUAL
OUTDOOR CONDENSING UNIT
NOTICE
SAFETY WARNING

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Summary of Contents for YMGI VRUO-2436HP-U2B(54)

  • Page 1 Universal VRUI Thank you for choosing this YMGI product. Please read the owner’s manual carefully before installation and operation, and retain for your records and future reference. If you need a replacement copy, please contact your local agent or visit www.ymgigroup.com to download a current electronic version.

  • Page 2: Table Of Contents

    Limited Product Warranty ........................8 Limited Product Warranty Registration Card ..................10 Why Does YMGI Group Require Installation and Service to Be Performed 100% By Currently Licensed or Certified HVAC Technicians/Contractors ..........11 Suggestions to Aid You in Hiring an HVAC Contractor ................11 Introduction to Unitary Systems ......................

  • Page 3: Introduction

    Refrigerants that contain Chlorine, Fluorine and Carbon (CFCs) and those containing Hydrogen, Chlorine, Fluorine and Carbon (HCFCs), may affect the ozone layer. Not all refrigerants have the same potential impact on the environment. YMGI Group advocates for the responsible handling of all refrigerants including industry replacements for CFCs such as HCFCs and HFCs.
  • Page 4 This document and the information contained therein are the sole property of YMGI Group and shall not be used or reproduced in whole or in part, without the written permission of YMGI Group. YMGI Group reserves the right to revise this manual at any time and to make changes to its content without obligation to notify anyone about any modifications, revisions or changes.

  • Page 5: Note From Ymgi - Must Read

    YMGI Group is the MEDIA AUTHORITY: YMGI Group, located in O'Fallon, MO 63366 is the author of all media produced for its products and is the only party able to give any additional explanation for any data, definitions and or descriptions found within any of its media, including but not limited to YMGI product brochures, manuals, pamphlets, catalogs, and videos.
  • Page 6 In an effort to help protect our customers from possible faulty installations that can lead to premature unit failure, YMGI provides the above information for you and the technician. You can observe while your system is being installed, even though your observation is not a guarantee your system is being or has been installed properly and professionally.

  • Page 7: Installing Technician/Contractor's Responsibilities

    You will be solely responsible for the entire installation that you have been contracted. Make sure you have all the materials you need to properly, completely and correctly finish the installation. The YMGI units and accessories may be just a portion of what you will need for the project. When support issues arise, remember YMGI employees and YMGI distributors/sales, dealers and agents are not installers and may only provide suggestions.

  • Page 8: Limited Product Warranty

    Compressor: YMGI will warrant the compressor of an YMGI-validated and approved warranty filing, for a period of 7 years from the date of successful installation at its original installation location. Parts: YMGI will warrant parts of an YMGI-validated and approved warranty filing, for two years from the date of successful installation at original installation location.
  • Page 9 YMGI Technical support the exact part(s) needed to fix the problem(s). 2. YMGI will check the customer's warranty filing. There will be no charge for Parts with a validated and approved warranty. Any Parts that have not been validated and approved or have an invalid warranty filing resulting in an unapproved warranty request, will be charged accordingly.
  • Page 10 YMGI: Your Modern Green Idea YMGI, Engineered Comfort Products for A Sustainable and Efficient Green World!

  • Page 11: Why Does Ymgi Group Require Installation And Service To Be Performed 100% By Currently Licensed Or Certified Hvac Technicians/Contractors

    6. Some contractors/technicians may not feel comfortable about installing equipment that has been purchased by someone other than themselves. They prefer to purchase and install the equipment themselves. You can contact YMGI directly to check and see if there are contractors in your area who have installed our products or any similar products.
  • Page 12 YMGI Group recommends that only properly trained and authorized personnel be allowed to repair or service the unit. Improper repairs or servicing can result in electric shock or fire hazards. Please contact YMGI Group if you need help locating a qualified repair or service technician.
  • Page 13 YMGI: Your Modern Green Idea YMGI Group will not be responsible for any personal injury or any property damage caused by improper or incorrect installation, improper service or maintenance or by not following the instructions listed in this manual. DO NOT pull on the power supply cords or refrigeration lines that are connected to the indoor and outdoor units.

  • Page 14: Product Introduction

    208/230V-1Ph-60Hz List of Indoor Units Power Supply Cooling/Heating Appearance Model Capacity (Btu/h) V/Ph/Hz Airhandler 24000/24000 VRUI-24UC-M2B(54) 208/230V-1Ph-60Hz Airhandler 36000/36000 VRUI-36UC-M2B(54) 208/230V-1Ph-60Hz Airhandler 48000/48000 VRUI-48UC-M2B(54) 208/230V-1Ph-60Hz Airhandler 54000/54000 208/230V-1Ph-60Hz VRUI-60UC-M2B(54) YMGI, Engineered Comfort Products for A Sustainable and Efficient Green World!
  • Page 15 Circuit breaker capacity Model V/Ph/Hz VRUO-2436HP-U2B(54) 208/230V-1Ph-60Hz VRUO-4860HP-U2B(54) 208/230V-1Ph-60Hz Power Supply Fuse Capacity Circuit breaker capacity Model V/Ph/Hz VRUI-24UC-M2B(54) 208/230V-1Ph-60Hz 3.15 VRUI-36UC-M2B(54) 208/230V-1Ph-60Hz 3.15 VRUI-48UC-M2B(54) 208/230V-1Ph-60Hz 3.15 VRUI-60UC-M2B(54) 208/230V-1Ph-60Hz 3.15 YMGI, Engineered Comfort Products for A Sustainable and Efficient Green World!
  • Page 16 YMGI: Your Modern Green Idea Operation Mode Cooling Mode YMGI, Engineered Comfort Products for A Sustainable and Efficient Green World!
  • Page 17 YMGI: Your Modern Green Idea Heating Mode YMGI, Engineered Comfort Products for A Sustainable and Efficient Green World!
  • Page 18 You need to manually turn off the unit and clear the error before restarting the unit. (If high pressure protection occurs frequently, please contact an HVAC professional personnel to inspect and repair.) YMGI, Engineered Comfort Products for A Sustainable and Efficient Green World!
  • Page 19 If discharge high temperature protection occurs several times in a short period of time, system will not restore operation automatically. You need to manually turn off the unit before restarting it. YMGI, Engineered Comfort Products for A Sustainable and Efficient Green World!
  • Page 20 Energy saving mode is achieved by setting the condensing unit operating mode to operate the air conditioner within a small load range. Operating mode Outdoor unit dip switches Standard mode (Default) Strong mode Energy saving mode YMGI, Engineered Comfort Products for A Sustainable and Efficient Green World!
  • Page 21 Then short press "SW1" to save. During debugging, if no operation is performed within 10s, the debugging mode interface is automatically exited. Thermostat Functions Thermostat model: XE70-00/E1, please refer to the thermostat instruction manual for all functions. YMGI, Engineered Comfort Products for A Sustainable and Efficient Green World!
  • Page 22 TroubleShooting Wiring Diagram The following electric wiring diagram is for reference only. Please refer to the version stickered inside your unit as the latest version. ODU Wiring Diagrams VRUO-2436HP-U2B(54) YMGI, Engineered Comfort Products for A Sustainable and Efficient Green World!
  • Page 23 YMGI: Your Modern Green Idea VRUO-4860HP-U2B(54) YMGI, Engineered Comfort Products for A Sustainable and Efficient Green World!
  • Page 24 YMGI: Your Modern Green Idea Wiring Diagrams of IDUs VRUI-24UC-M2B(54) & VRUI-36UC-M2B(54) VRUI-48UC-M2B(54) & VRUI-60UC-M2B(54) YMGI, Engineered Comfort Products for A Sustainable and Efficient Green World!
  • Page 25 Transformer AC motor low X6(OFAN-L-OUT) Neutral wire input speed output Transformer Live Transformer X3(C) wire input Neutral wire output Transformer Live X10(O_SCAN) 4-Way check X4(R) wire output YMGI, Engineered Comfort Products for A Sustainable and Efficient Green World!
  • Page 26 YMGI: Your Modern Green Idea Pinboard Printing Interface Printing Interface DC motor control DC-MOTOR1 DC motor output COM2 signal input YMGI, Engineered Comfort Products for A Sustainable and Efficient Green World!
  • Page 27 Electronic expansion valve 1 interface COM- Thermostat interface Refrigerant heat dissipation MANUAL DC_MOTOR1 COMM1 Drive communication interface DC motor output DC_MOTOR2 L-PRESS Low pressure sensor interface PWR1 310V DC power supply interface YMGI, Engineered Comfort Products for A Sustainable and Efficient Green World!
  • Page 28 COMM Compressor V phase terminal COMM1 Drive power supply terminal Compressor W phase terminal DC-MOTOR1 DC fan terminal JTAG1 Programming interface (for testing) DC-BUS1 Power discharge terminal (for testing) YMGI, Engineered Comfort Products for A Sustainable and Efficient Green World!
  • Page 29 Compressor W phase terminal JTAG1 Programminginterface (for testing) Drive power supply terminal Communication terminal, same with COMM DC-BUS Power discharge terminal (for testing) COMM L2-1 PFC induction wire (yellow) YMGI, Engineered Comfort Products for A Sustainable and Efficient Green World!
  • Page 30 Power output neutral wire terminal Filtering board ground wire terminal L-OUT1 Power output live wire terminal Filtering board grounding hole L-OUT Power output live wire terminal (reserved) DC-BUS Power discharge terminal (for testing) YMGI, Engineered Comfort Products for A Sustainable and Efficient Green World!
  • Page 31 3. If the measured voltages between L1-2andP; L2-1andP;Nand L1-2;NandL2-1 are all among 0.3V-0.7V, then it indicates the PFC module is normal; If any measured valve is 0, it indicates the PFC is damaged. YMGI, Engineered Comfort Products for A Sustainable and Efficient Green World!
  • Page 32 YMGI: Your Modern Green Idea VRUO-2436HP-U2B(54) VRUO-4860HP-U2B(54) YMGI, Engineered Comfort Products for A Sustainable and Efficient Green World!

  • Page 33: Error Codes

    When malfunction occurs, please shut off the unit and send for professional personnel to repair. For example, E1 (as shown below) indicates high pressure protection. YMGI, Engineered Comfort Products for A Sustainable and Efficient Green World!
  • Page 34  IDU filter or air duct is blocked (heating mode)  Ambient temperature is too high;  Refrigerant charging amount is too much  System pipeline is blocked Troubleshooting: YMGI, Engineered Comfort Products for A Sustainable and Efficient Green World!
  • Page 35 Outdoor or indoor fan is not working properly  IDU filter or air duct is blocked (cooling mode)  Ambient temperature is too low  Refrigerant charging amount is insufficient  System pipeline is blocked Troubleshooting: YMGI, Engineered Comfort Products for A Sustainable and Efficient Green World!
  • Page 36  IDU filter or air duct is blocked (cooling mode)  Ambient temperature exceeds allowable operation range  Refrigerant charging amount is insufficient  System pipeline is blocked Troubleshooting: YMGI, Engineered Comfort Products for A Sustainable and Efficient Green World!
  • Page 37 Poor contact between temperature sensor and terminal in mainboard interface  Temperature sensor is abnormal  Detecting circuit is abnormal Troubleshooting： NOTE: Please refer to Appendix 1 for the relation between temperature and resistance of temperature sensor. YMGI, Engineered Comfort Products for A Sustainable and Efficient Green World!
  • Page 38 Poor contact between ambient temperature sensor and terminal in mainboard interface  Ambient temperature sensor is abnormal  Detecting circuit is abnormal Troubleshooting： NOTE: Please refer to Appendix 1 for the relation between temperature and resistance of temperature sensor. YMGI, Engineered Comfort Products for A Sustainable and Efficient Green World!
  • Page 39 Poor contact between temperature sensor and terminal in mainboard interface  Temperature sensor is abnormal  Detecting circuit is abnormal Troubleshooting： NOTE: Please refer to Appendix 1 for the relation between temperature and resistance of temperature sensor. YMGI, Engineered Comfort Products for A Sustainable and Efficient Green World!
  • Page 40 Poor contact between temperature sensor and terminal in mainboard interface  Temperature sensor is abnormal  Detecting circuit is abnormal Troubleshooting： NOTE: Please refer to Appendix 1 for the relation between temperature and resistance of temperature sensor. YMGI, Engineered Comfort Products for A Sustainable and Efficient Green World!
  • Page 41 If ODU mainboard cannot read the memory chip, this error will be reported. Possible reason:  Memory chip on the ODU mainboard is damaged.  Memory chip is weakly welded.  Memory chip lead is short-circuited. Troubleshooting: YMGI, Engineered Comfort Products for A Sustainable and Efficient Green World!
  • Page 42 Cooling ODU heat exchanger is blocked or heat exchange is bad.  Heating IDU heat exchanger is blocked or heat exchange is bad.  Operating temperature is too high.  System charging quantity is too much. Troubleshooting： YMGI, Engineered Comfort Products for A Sustainable and Efficient Green World!
  • Page 43 Drive board 6-line PWM signal and the corresponding element are abnormal.  Drive board compressor current sampling circuit element is damaged or drive chip current sampling AD terminal is abnormal.  Compressor is damaged. Troubleshooting： YMGI, Engineered Comfort Products for A Sustainable and Efficient Green World!
  • Page 44 If it is a new unit or a new motor has been replaced in the unit and the wire connection is correct, then probably it is the program that goes wrong. Troubleshooting： YMGI, Engineered Comfort Products for A Sustainable and Efficient Green World!
  • Page 45 Drive board IPM module is damaged.  Drive board compressor current sampling circuit element is damaged or drive chip current sampling AD terminal is abnormal.  Compressor is damaged. Troubleshooting： YMGI, Engineered Comfort Products for A Sustainable and Efficient Green World!
  • Page 46 Drive board PWM signal for PFC and corresponding element is abnormal  Drive board PFC current sampling circuit element is damaged or drive chip current sampling AD terminal is abnormal. Troubleshooting： YMGI, Engineered Comfort Products for A Sustainable and Efficient Green World!
  • Page 47 Check the error code on nixie tube of ODU main control board. If PJ is displayed, it indicatesinverter compressor startup failure Possible reason:  Poor contact of compressor UVW wire  Compressor is broken  Compressor drive board is broken Troubleshooting： YMGI, Engineered Comfort Products for A Sustainable and Efficient Green World!
  • Page 48 In this case, it can be judged as drive chip reset protection. Possible reason:  3.3V drive chip supply voltage drop.  TRST lead of JTAG programming is interrupted. Troubleshooting YMGI, Engineered Comfort Products for A Sustainable and Efficient Green World!
  • Page 49 Compressor phase wire is loose or has bad contact.  Drive board current sampling circuit element is damaged or drive chip current sampling AD terminal is abnormal.  Compressor is damaged. Troubleshooting： YMGI, Engineered Comfort Products for A Sustainable and Efficient Green World!
  • Page 50 The switch power of drive board is abnormal, therefore, the 3.3V power voltage is abnormal.  Communication circuit of the drive board or the master control board is abnormal. Troubleshooting： YMGI, Engineered Comfort Products for A Sustainable and Efficient Green World!
  • Page 51  The module securing screws are not tightened up.  Drive board temperature sampling circuit element is damaged or drive chip temperature sampling AD terminal is abnormal. Troubleshooting： YMGI, Engineered Comfort Products for A Sustainable and Efficient Green World!
  • Page 52 Grid voltage is abnormal.  PFC module is damaged.  Drive board PFC current sampling circuit element is damaged or drive chip PFC current sampling AD terminal is abnormal. Troubleshooting： YMGI, Engineered Comfort Products for A Sustainable and Efficient Green World!
  • Page 53 Possible reason:  Voltage of power grid is abnormal.  Drive board busbar voltage sampling circuit element is damaged or driveboard busbar voltage sampling AD terminal is abnormal. Troubleshooting： YMGI, Engineered Comfort Products for A Sustainable and Efficient Green World!
  • Page 54 Voltage of power grid is abnormal. Voltage is too low.  Drive board charge loop element is abnormal.  Drive board busbar voltage sampling circuit element is damaged or drivechip busbar voltage sampling AD terminal is abnormal. Troubleshooting： YMGI, Engineered Comfort Products for A Sustainable and Efficient Green World!
  • Page 55 AD value exceeds upper limit and lower limit in 30seconds continuously, report the error. Possible reason:  Poor contact between pressure sensor and terminal in mainboard interface  Pressure sensor is abnormal  Detecting circuit is abnormal Troubleshooting： YMGI, Engineered Comfort Products for A Sustainable and Efficient Green World!
  • Page 56 If jumper cap model doesn‘t match with mainboard, report the error Possible reason:  Jumper cap is not installed  Jumper cap model is wrong  Detecting circuit is abnormal Troubleshooting： YMGI, Engineered Comfort Products for A Sustainable and Efficient Green World!
  • Page 57 Send for a professional to clean the filter. Clear away obstacles that are blocking the air Air inlets or outlets of the units are blocked. inlets and outlets of the units. YMGI, Engineered Comfort Products for A Sustainable and Efficient Green World!
  • Page 58 Check the above items and use the corresponding corrective measures. If the air conditioner continues to function poorly, please stop the air conditioner immediately and contact YMGI’s authorized local service center. Ask a professional HVAC Technician to check and repair the unit.
  • Page 59 And verify if the pressure gauge at the low pressure side of the manifold valve assembly reads -0.1Mpa (-750mmHg), if not, it indicates there is leak somewhere. Then, close the switch fully and then stop the vacuum pump. YMGI, Engineered Comfort Products for A Sustainable and Efficient Green World!
  • Page 60 Refrigerant should be reclaimed into the appropriate storage tank. System should use oxygen-free nitrogen purging to ensure safety. This process may need to repeat several times. Do not use compressed air or oxygen in this process. YMGI, Engineered Comfort Products for A Sustainable and Efficient Green World!
  • Page 61 Step 7: If you can’t continue to charge refrigerant into the system and the quantity of charged refrigerant is less than the required charging quantity, then record the current quantity of charged refrigerant: m=m1-m2 m`=M-m The remaining charging quantity is: m`=M-m Step 8: After charging, remove the pressure gauge. YMGI, Engineered Comfort Products for A Sustainable and Efficient Green World!
  • Page 62 5) Before re-charging refrigerant into the system, use oxygen-free nitrogen to perform pressure test. When charging is completed, perform leak test before trial running. Before leaving the workplace, perform a leak test again. YMGI, Engineered Comfort Products for A Sustainable and Efficient Green World!
  • Page 63 If the compressor is working at 60Hz, the working current corresponding to different condensing temperature and evaporating temperature is shown below: Inverter compressor QXFT-F310zN450 Inverter compressor QXAU-F516zX440A YMGI, Engineered Comfort Products for A Sustainable and Efficient Green World!
  • Page 64 During normal operation, the 4 copper tubes that connect to the valve will have different temperature. When the 4- way valve is working, it will generate some noise and vibration. YMGI, Engineered Comfort Products for A Sustainable and Efficient Green World!
  • Page 65 Please refer to the IPM checking method in the section of troubleshooting. Check the drive board of compressor, i.e. the IPM module. Please refer to the IPM checking method in the section of troubleshooting. YMGI, Engineered Comfort Products for A Sustainable and Efficient Green World!
  • Page 66 The checking method is the same as instructed above. Step 4: Check whether the IPM module is normal. Please refer to the IPM checking method in the section of troubleshooting. YMGI, Engineered Comfort Products for A Sustainable and Efficient Green World!
  • Page 67 This is to prevent the compressor oil from contacting the air. Before replacement, make sure the nameplates and models of the compressors are identical. Make sure the lubricant is sealed inside the compressors. YMGI, Engineered Comfort Products for A Sustainable and Efficient Green World!
  • Page 68 NOTE: Confirm whether the compressor needs to be replaced. The pipe mouths of the faulted compressor must be sealed by adhesive tape as soon as the compressor is detached. Make sure the compressor is well preserved for the ease of future analysis. YMGI, Engineered Comfort Products for A Sustainable and Efficient Green World!
  • Page 69 After clearing the pipeline, if the components are not replaced immediately, seal the pipeline with adhesive tape to prevent the system from being contaminated by water and/or impurities in the air. YMGI, Engineered Comfort Products for A Sustainable and Efficient Green World!
  • Page 70 Step 12: Connect electric components Connect cables, compressor wires and the electric heating belt according to the signs marked before and the wiring diagram on the cover of the electric box. YMGI, Engineered Comfort Products for A Sustainable and Efficient Green World!
  • Page 71 Step 5: Replace with a new compressor drive board. Before replacement, apply some silica gel on the IPM module. Step 6: Install the new compressor drive board. Fix the screws and connect the wires correctly. YMGI, Engineered Comfort Products for A Sustainable and Efficient Green World!
  • Page 72 Gas liquid separator into the compressor. If liquefied refrigerant gets inside the compressor, ineffective compressor or slugging phenomenon will occur. YMGI, Engineered Comfort Products for A Sustainable and Efficient Green World!
  • Page 73 It is used to lower the pressure and temperature of liquefied refrigerant and Electronic expansion valve adjust the flow of refrigerant entering the evaporator. Electromagnetic valve controls increased Electromagnetic Valve enthalpy switch. YMGI, Engineered Comfort Products for A Sustainable and Efficient Green World!
  • Page 74 3. Remove the front grill. with a screwdriver.  Unscrew the screws that connect the 4. Remove the front panel. front panel to the middle insulating board and screws around the front YMGI, Engineered Comfort Products for A Sustainable and Efficient Green World!
  • Page 75 6 clasps on its both sides. Please note that there is one screw on the lower right side.  Install the grill. Attach the grill back in place and tighten up the screws. YMGI, Engineered Comfort Products for A Sustainable and Efficient Green World!
  • Page 76 Fix the clasps on both sides of the 9. Install the front side plate. plate and tighten up the screws.  Tighten up the screws around the 10. Install the upper cover plate. upper cover plate. YMGI, Engineered Comfort Products for A Sustainable and Efficient Green World!
  • Page 77 4. Remove the compressor/gas new one. liquid separator from the chassis. NOTE: When replacing the compressor/gas liquid separator, avoid touching the nearby pipeline and components. YMGI, Engineered Comfort Products for A Sustainable and Efficient Green World!
  • Page 78  Connect the compressor wires to the wire terminals on the top of compressor. Connect the compressor wires. NOTE: When connecting the wires, be sure to match the colors with the corresponding wire terminals. YMGI, Engineered Comfort Products for A Sustainable and Efficient Green World!
  • Page 79 Do not let the flame burn the other components.  Tighten the screws of the coil of 4- Install the coil of 4-way valve. way valve with a screwdriver. YMGI, Engineered Comfort Products for A Sustainable and Efficient Green World!
  • Page 80 3. Remove motor. NOTE: Motor wire should be first removed from the electric box.  Replace with a new motor. Then 4. Install the motor. tighten up the screw bolt. YMGI, Engineered Comfort Products for A Sustainable and Efficient Green World!

  • Page 81: Wiring Diagrams

     After replacing the motor, use a screwdriver to tighten up the screw 6. Install the grill. bolt that secures the motor. Arrange the wires according to the wiring diagram. YMGI, Engineered Comfort Products for A Sustainable and Efficient Green World!
  • Page 82 NOTE: When welding the pipes, do not let the flame burn the other components. The welding points of condenser are steel and copper welding points. Be sure to maintain the welding quality. YMGI, Engineered Comfort Products for A Sustainable and Efficient Green World!
  • Page 83 8. Check and open the upper and connected.  side panels. If everything is OK, place back the upper, left and right side panels. YMGI, Engineered Comfort Products for A Sustainable and Efficient Green World!
  • Page 84 NOTE: When welding the pipe, do not let the flame bunt the other components.  Take out the electronic expansion 4. Take out the electronic valve. expansion valve. YMGI, Engineered Comfort Products for A Sustainable and Efficient Green World!
  • Page 85 7. Check and open the upper and  If everything is OK, install the front panels. upper, left and right panels. Tighten up the screws. YMGI, Engineered Comfort Products for A Sustainable and Efficient Green World!
  • Page 86  Install the front panel by mounting 5. Install the front panel. on 6 clasps on its both sides. Please note that there is one screw on the lower right side. YMGI, Engineered Comfort Products for A Sustainable and Efficient Green World!
  • Page 87  Screw up the screws around the right side plate. Be careful to Install the right side plate. handle well the clasps at the bottom of the right side plate. YMGI, Engineered Comfort Products for A Sustainable and Efficient Green World!
  • Page 88  Attach the grill back in place and 10. Install the grill. tighten up the screws.  Tighten up the screws around the 11. Install the upper cover plate. upper cover plate. YMGI, Engineered Comfort Products for A Sustainable and Efficient Green World!
  • Page 89 Break off the pipes that  Then remove the pipes. connecting to the compressor. NOTE: When welding the pipes, do not let the flame burn the other components. YMGI, Engineered Comfort Products for A Sustainable and Efficient Green World!
  • Page 90 Connect the compressor wires to the wire terminals on the top of compressor. Connect the compressor wires. NOTE: When connecting the wires, be sure to match the colors with the corresponding wire terminals. YMGI, Engineered Comfort Products for A Sustainable and Efficient Green World!
  • Page 91 Do not let the flame burn the other components.  Tighten the screws of the coil of Install the coil of 4-way valve. 4-way valve with a screwdriver. YMGI, Engineered Comfort Products for A Sustainable and Efficient Green World!
  • Page 92  Use a screwdriver to unscrew the bolt of motor. Remove motor.  NOTE: Motor wire should be first removed from the electric box. YMGI, Engineered Comfort Products for A Sustainable and Efficient Green World!
  • Page 93 If not, please check for the reason.  After replacing the motor, use a Install the grill. screwdriver to tighten up the screw bolt that secures the motor. YMGI, Engineered Comfort Products for A Sustainable and Efficient Green World!
  • Page 94 Remove the compressor/gas liquid separator from the NOTE: When replacing the compressor/gas liquid separator, avoid touching the nearby pipeline and components. YMGI, Engineered Comfort Products for A Sustainable and Efficient Green World!
  • Page 95 Check and open the upper and connected. side panels.  If everything is OK, install the upper, left and right panels. Tighten up the screws. YMGI, Engineered Comfort Products for A Sustainable and Efficient Green World!
  • Page 96 Remove the electronic welding. Then remove the expansion valve. connection pipe. NOTE: When welding the pipe, do not let the flame bunt the other components. YMGI, Engineered Comfort Products for A Sustainable and Efficient Green World!
  • Page 97 Check and open the upper and  If everything is OK, install the side panels. upper, left and right panels. Tighten up the screws. YMGI, Engineered Comfort Products for A Sustainable and Efficient Green World!
  • Page 98 Wire the electric element to the wiring terminal.  Loosen screws round the upper Reinstall the electric box. panel with a screwdriver.  Remove the upper panel from unit. YMGI, Engineered Comfort Products for A Sustainable and Efficient Green World!
  • Page 99  Tighten screws fixing the motor Reinstall the fan. and fan blades.  Tighten screw bolts fixing the motor bracket.  After the installation, reassemble the unit as before. YMGI, Engineered Comfort Products for A Sustainable and Efficient Green World!
  • Page 100  Loosen screws at both side of the Remove the mounting plate of mounting plate with a screwdriver.  the drain pan. Remove the mounting plate from the unit. YMGI, Engineered Comfort Products for A Sustainable and Efficient Green World!
  • Page 101 Remove the secondary drain pan Remove the secondary drain from the unit. pan.  Remove the evaporator away Remove the evaporator. from the primary drain pan.  Reassemble the unit as before. YMGI, Engineered Comfort Products for A Sustainable and Efficient Green World!
  • Page 102 Remove the mounting plate away from the unit.  Remove the filter screen away Remove the filter screen. from the unit.  After replacing the filter screen, reassemble the unit as before. YMGI, Engineered Comfort Products for A Sustainable and Efficient Green World!
  • Page 103 ODU Explosive View and Lists of Parts VRUO-2436HP-U2B(54) Material name Coping Electric Box Assy PFC Inductance Filter Board Reactor Sub-Assy Power Switch Main Board Inductance Terminal Board Terminal Board Radiator YMGI, Engineered Comfort Products for A Sustainable and Efficient Green World!
  • Page 104 Strainer Electric Expand Valve Fitting Electric Expansion Valve Sub-Assy Rear Side Plate 4-Way Valve Assy Silencer Pressure Protect Switch Filter Pressure Protect Switch 4-Way Valve Pressure Sensor Rear Grill YMGI, Engineered Comfort Products for A Sustainable and Efficient Green World!
  • Page 105 YMGI: Your Modern Green Idea VRUO-4860HP-U2B(54) Description Part Number Top Cover 01265356P03 Electric Box Assy 100002067316 Inductance 43120122 Inductance Box Sub-assy 017024060021 Drive Board 300078060066 Radiator 430034000032 Main Board 300027060636 Filter board 300020060032 YMGI, Engineered Comfort Products for A Sustainable and Efficient Green World!
  • Page 106 Temperature Sensor 3900028025G Temperature Sensor 3900007201 electrical heater 7651521216 Electrical Heater 7651000417 Rear Side Plate Sub-Assy 017051060121P Condenser Assy 000100060341 Rear Grill 0157520501 Not Shown Drainage Joint Need Part # YMGI, Engineered Comfort Products for A Sustainable and Efficient Green World!
  • Page 107 YMGI: Your Modern Green Idea VRUI-24HP-U2B(54) VRUI-36HP-U2B(54) VRUI-48HP-U2B(54) VRUI-60HP-U2B(54) Material name Coping Left Side Plate Electric Box Assy Terminal Board Transformer Terminal Board Main Board Terminal Board YMGI, Engineered Comfort Products for A Sustainable and Efficient Green World!
  • Page 108 Bottom Cover Plate Assy Water Tray Strainer Cut-Off Valve 3/8(N) Thermal Expansion Valve Cut Off Valve Evaporator Assy Evaporator Assy Evaporator Assy Water Tray Assy Choke Plug Water Tray Filter Sub-Assy YMGI, Engineered Comfort Products for A Sustainable and Efficient Green World!
  • Page 109 115.00 239.00 15.68 1.613 0.66 3.161 25.00 77.00 116.00 240.80 1.65 0.642 3.165 26.00 78.80 117.00 242.60 14.36 1.686 0.625 3.168 27.00 80.60 118.00 244.40 13.74 1.722 0.608 3.171 YMGI, Engineered Comfort Products for A Sustainable and Efficient Green World!
  • Page 110 3.25 67.00 152.60 2.898 2.766 158.00 316.40 0.227 3.251 68.00 154.40 159.00 318.20 2.797 2.781 0.222 3.252 69.00 156.20 2.702 2.796 160.00 320.00 0.217 3.253 70.00 158.00 2.611 2.811 YMGI, Engineered Comfort Products for A Sustainable and Efficient Green World!
  • Page 111 226.40 36.24 1.174 1.069 3.133 13.00 55.40 109.00 228.20 34.57 1.209 1.039 3.137 14.00 57.20 110.00 230.00 32.98 1.246 1.01 3.141 15.00 59.00 111.00 231.80 31.47 1.282 0.9825 3.145 YMGI, Engineered Comfort Products for A Sustainable and Efficient Green World!
  • Page 112 0.3093 3.25 62.00 143.60 158.00 316.40 4.605 2.682 0.3024 3.251 63.00 145.40 159.00 318.20 4.443 0.2956 3.252 64.00 147.20 160.00 320.00 4.289 2.717 0.2891 3.253 65.00 149.00 4.14 2.734 YMGI, Engineered Comfort Products for A Sustainable and Efficient Green World!
  • Page 113 212.00 102.85 0.292 3.3147 2.478 10.00 50.00 101.00 213.80 98.006 0.306 3.22 2.496 11.00 51.80 102.00 215.60 93.42 0.319 3.1285 2.514 12.00 53.60 103.00 217.40 89.075 0.333 3.0401 2.531 YMGI, Engineered Comfort Products for A Sustainable and Efficient Green World!
  • Page 114 0.9971 3.001 57.00 134.60 148.00 298.40 13.575 0.9752 3.007 58.00 136.40 149.00 300.20 13.086 1.429 0.9538 3.013 59.00 138.20 150.00 302.00 12.617 1.459 0.9331 3.018 60.00 140.00 12.368 1.475 YMGI, Engineered Comfort Products for A Sustainable and Efficient Green World!
  • Page 115 7. Open-end wrench 12. Universal meter; 3. Electric driven rotary hammer 8. Pipe cutter 13. Hexagon wrench 4. Drill 9. Leak detector 14. Tapeline. 5. Pipe expander 10. Vacuum pump YMGI, Engineered Comfort Products for A Sustainable and Efficient Green World!

  • Page 116: User Notes And Installation/Service/Maintenance Notes

    Email: ______________________________________________________________________ INSTALLATION NOTES Please record any questions or problems you have experienced as a unit history: Asked Your Asked YMGI Tech. Date Notes Technician for Help? contacted for help? YMGI, Engineered Comfort Products for A Sustainable and Efficient Green World!
  • Page 117 Please record any questions or problems you have experienced as a unit history: Company Name, Technician Name, Phone Job Not Performed Technician Checklist Date & HVAC License # by Technician Completed Fully? YMGI, Engineered Comfort Products for A Sustainable and Efficient Green World!
  • Page 118 YMGI: Your Modern Green Idea SERVICE / MAINTENANCE NOTES Company Name, Technician Name, Date Type of Service / Maintenance Phone & HVAC License # YMGI, Engineered Comfort Products for A Sustainable and Efficient Green World!
  • Page 119 YMGI: Your Modern Green Idea YMGI, Engineered Comfort Products for A Sustainable and Efficient Green World!
  • Page 120 YMGI: Your Modern Green Idea YMGI is dedicated to designing, manufacturing and distributing the highest quality, energy saving and environmentally friendly air conditioner and heat pump products, while providing the best service and support to all of our customers. Our mission is to help build a sustainable, efficient and green world.

This manual is also suitable for:

Vruo-4860hp-u2b(54)

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