Gree GUD160W/NhB-X Owner's Manual
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Gree GUD160W/NhB-X Owner's Manual

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Original Instructions
Air Conditioners
DC Inverter U-match Series Duct Type Unit
Models:
Indoor Unit
GUD50P/B-S
GUD71PH/B-S
GUD100PH/B-S
GUD125PH/B-S
GUD140PH/B-S
GUD160PH/B-S
GUD50PS/B-S
GUD71PHS/B-S
GUD100PHS/B-S
GUD125PHS/B-S
GUD140PHS/B-S
GUD160PHS/B-S
Outdoor Unit
GUD50W/NhB-S
GUD71W/NhB-S
GUD100W/NhB-S
GUD125W/NhB-S
GUD140W/NhB-S
GUD160W/NhB-S
GUD160W/NhB-X

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Summary of Contents for Gree GUD160W/NhB-X

  • Page 1 Original Instructions Air Conditioners DC Inverter U-match Series Duct Type Unit Models: Indoor Unit Outdoor Unit GUD50P/B-S GUD50PS/B-S GUD50W/NhB-S GUD71PH/B-S GUD71PHS/B-S GUD71W/NhB-S GUD100PH/B-S GUD100PHS/B-S GUD100W/NhB-S GUD125PH/B-S GUD125PHS/B-S GUD125W/NhB-S GUD140PH/B-S GUD140PHS/B-S GUD140W/NhB-S GUD160PH/B-S GUD160PHS/B-S GUD160W/NhB-S GUD160W/NhB-X...
  • Page 2 To Users Thank you for selecting Gree’s product. Please read this instruction manual carefully before installing and using the product, so as to master and correctly use the product. In order to guide you to correctly install and use our product and...
  • Page 3 (10) The final right to interpret for this instruction manual belongs to Gree Electric Appliances, Inc. of Zhuhai. Exception Clauses...

  • Page 4: Table Of Contents

    Contents 1 Safety Notice (Please be sure to abide them) ....1 2 Product Introduction ............5 2.1 Overall Layout ................5 2.2 Operating Range ..............6 2.3 Standard Accessories .............6 3 Installation ................7 3.1 Installation Preparation ............7 3.2 Unit Installation ..............19 3.3 Electrical Installation ............

  • Page 5: Safety Notice (Please Be Sure To Abide Them)

    DC Inverter U-match Series Duct Type Unit 1 Safety Notice (Please be sure to abide them) SPECIAL WARNING: (1) Be sure to comply with national gas regulations. (2) Do not pierce or burn. (3) Do not use means to accelerate the defrosting process or to clean, other than those recommended by the manufacturer.
  • Page 6 DC Inverter U-match Series Duct Type Unit Before repairing the air conditioner, please read the instruction manual. The figures in this manual may be different with the material objects, please refer to the material objects for reference. PROHIBITED! (1) The air conditioner should be grounded to avoid electric shock. Do not connect the ground wire to gas pipe, water pipe, lightning arrester or telephone wire.
  • Page 7 DC Inverter U-match Series Duct Type Unit WARNING! (9) Please install the air conditioner in a secure place that can withstand the weight of air conditioner. Insecure installation may cause the air conditioner falling down and lead to injury. (10) Be sure to adopt independent power circuit. If the power cord is damaged, it must be repaired by the manufacturer, service agent or other professional agents.
  • Page 8 DC Inverter U-match Series Duct Type Unit NOTICE! (1) Do not put a finger or other objects into the air inlet or air return grill. (2) Please adopt safety protection measures before touching the refrigerant pipe; otherwise your hands may be hurt. (3) Please arrange the drain pipe according to the instruction manual.

  • Page 9: Product Introduction

    DC Inverter U-match Series Duct Type Unit 2 Product Introduction 2.1 Overall Layout NOTICE: The connection pipe, drain pipe, power cord, and duct for this unit should be prepared by the user. The unit is standard equipped with rectangular duct.

  • Page 10: Operating Range

    DC Inverter U-match Series Duct Type Unit 2.2 Operating Range Cooling Heating Outdoor temperature DB(°C) -15~52 -15~24 Indoor temperature DB/WB(°C)(Maximum) 32/23 27/- 2.3 Standard Accessories Indoor Unit Accessories Name Appearance Q'ty Usage Wired Controller To control the indoor unit To fix the hook on the Nut with Washer cabinet of the unit To fix the indoor unit...

  • Page 11: Installation

    DC Inverter U-match Series Duct Type Unit Indoor Unit Accessories Name Appearance Q'ty Usage Removal-Proof To prevent the removal of Screw Nut the liquid pipe connecting or Ordinary Nut+ nut(Refer to the fittings Tamperproof included in delivery) To fix the hanger(Only for Self-tapping GUD160PHS/B-S and screw...
  • Page 12 DC Inverter U-match Series Duct Type Unit 1) Refrigerant charging quantity for the entire system (ex-factory charging quantity + additional charging quantity). 2) Checking out in the applicable tables: A. For indoor unit, confirm the model of indoor unit and check the corresponding table.
  • Page 13 DC Inverter U-match Series Duct Type Unit Ceiling type Wall mounted type Floor standing type Weight(kg) Area (m Weight(kg) Area (m Weight (kg) Area (m 16.0 23.8 17.3 25.8 18.6 27.8 20.0 29.9 21.5 32.1 23.0 34.3 24.5 36.6 26.1 39.1 27.8 41.5...
  • Page 14 DC Inverter U-match Series Duct Type Unit 3.1.2 Selection of Installation Location WARNING! (1) If the outdoor unit will be exposed in strong wind, it must be securely located, otherwise it may fall down. (2) Install the air conditioner at a place where the inclination is less than 5°. (3) Do not install the unit at a place with direct sunlight.
  • Page 15 DC Inverter U-match Series Duct Type Unit Selection of Installation Location for Outdoor Unit (Select a location pursuant to the following condition). (1) Noise and air flow produced by the outdoor unit will not disturb the neighbors. (2) Select a location that is safe and away from animals and plants. If not, please add safety fences to protect the unit.
  • Page 16 DC Inverter U-match Series Duct Type Unit (1) Indoor unit GUD50P/B-S, GUD50PS/B-S, GUD100PH/B-S, GUD100PHS/B-S, GUD125PH/B-S, GUD125PHS/B-S, GUD140PH/B-S, GUD140PHS/B-S: GUD71PH/B-S, GUD71PHS/B-S: GUD160PH/B-S, GUD160PHS/B-S:...
  • Page 17 DC Inverter U-match Series Duct Type Unit NOTICE! Drilling of ceiling opening and installation of air conditioner must be performed by professionals! Unit: mm Dimensions Model GUD50P/B-S 1060 1000 GUD50PS/B-S GUD71PH/B-S GUD71PHS/B-S GUD100PH/B-S 1040 1000 GUD100PHS/B-S GUD125PH/B-S GUD125PHS/B-S 1440 1400 GUD140PH/B-S GUD140PHS/B-S GUD160PH/B-S...
  • Page 18 DC Inverter U-match Series Duct Type Unit GUD100W/NhB-S, GUD125W/NhB-S: GUD140W/NhB-S, GUD160W/NhB-S, GUD160W/NhB-X:...
  • Page 19 1350 GUD160W/NhB-S 1430 — GUD160W/NhB-X 3.1.4 Diagram of Unit Installation Space and Location (1) Diagram of installation space and location for outdoor unit (Notice: for best performance of the outdoor unit, make sure its installation space conforms to the following installation dimensions).
  • Page 20 DC Inverter U-match Series Duct Type Unit (mm) — — <H 1/2H<H — — >H Prohibited B,D,E — — >H 1/2H<H — — >H Prohibited 2) When two or more outdoor units are to be installed side by side. Unit: mm (mm) A,B,C —...
  • Page 21 DC Inverter U-match Series Duct Type Unit 3) When outdoor units are installed in rows. Unit: mm (mm) 1/2H<H >H Prohibited...
  • Page 22 DC Inverter U-match Series Duct Type Unit 4) When outdoor units are installed one above another. Unit: mm (2) Diagram of installation location and space for indoor unit (Notice: for the best performance of indoor unit, make sure its installation space conforms to the following installation dimensions).

  • Page 23: Unit Installation

    DC Inverter U-match Series Duct Type Unit 3.2 Unit Installation 3.2.1 Indoor Unit Installation 3.2.1.1 Preparation for Installing the Indoor Unit NOTICE! (1) Please tighten the nut and bolt to prevent the air conditioner from falling down. (2) The unit might be loose if fixing the panel rack only. Be careful during installation.
  • Page 24 DC Inverter U-match Series Duct Type Unit (4) Pass the unit hangers over the bolts installed to the ceiling and install the unit with the special nut. See the following figure. 3.2.1.2 Leveling After installing the indoor unit, level detection of the unit shall be conducted. Place the unit horizontally and leave the left and right side with a downward slope of 1/100~1/50 in drainage direction, as shown below.
  • Page 25 DC Inverter U-match Series Duct Type Unit (5) Plugs and drainage connector are not recommended if there is an electrical heater on the chassis. 3.2.3 Connection Pipe Installation 3.2.3.1 Installation Notice and Requirement on Connection Pipe Due to product improvement, there are currently two installation methods for the pipe connecting nut of indoor unit using R32 refrigerant.
  • Page 26 DC Inverter U-match Series Duct Type Unit (2) Installation of Ordinary Nut and Tamperproof box Unfold the connecting pipe and bend the connecting pipe according to the required length. Open the nut cover on the indoor unit’s pipe and align the conical mouth of the connecting pipe with the center of the indoor unit’s pipe.
  • Page 27 DC Inverter U-match Series Duct Type Unit Size of Fitting Maximum Biggest drop between Item Pipe(inch) pipe indoor and outdoor Model length(m) units(m) Liquid pipe Gas pipe GUD71PH/B-S GUD71PHS/B-S GUD100PH/B-S GUD100PHS/B-S GUD125PH/B-S GUD125PHS/B-S GUD140PH/B-S GUD140PHS/B-S GUD160PH/B-S GUD160PHS/B-S Connection pipe should adopt water-proof insulating material. Its wall thickness should be 0.5-1.0mm and the pipe wall should be able to withstand 6.0MPa.
  • Page 28 DC Inverter U-match Series Duct Type Unit (2) Outdoor unit is above the indoor unit. It’s necessary to add oil return bend and non-return bend at the lowest and highest position of the vertical pipe, as shown below: Dimensions for the making of oil return bend are as follows: A(inch) B(mm) C(mm)
  • Page 29 DC Inverter U-match Series Duct Type Unit the bag of indoor unit accessories. Then fit the flare nut on the pipe and use a flaring tool to flare the mouth of connection pipe. (4) Check whether the flaring part has cracked. (See the figure below) 3.2.3.3 Pipe Bending (1) The pipes are shaped by your hands.
  • Page 30 DC Inverter U-match Series Duct Type Unit 3.2.3.4 Connection Pipe of Indoor and Outdoor Units NOTICE! (1) Connect the pipe to the unit. Please follow the instructions stated in the figures below. Use both spanner and torque wrench. (2) When connecting the tapered screw nut, first apply chilled machine oil on its inner and outer surface and then screw it up for 3~4 circles.
  • Page 31 DC Inverter U-match Series Duct Type Unit Pipe diameter (inch) Tightening torque (N·m) 15~30 35~40 45~50 60~65 70~75 80~85 Screw on the flare nut of the flaring connecting pipe on the outdoor unit valve. The method of screwing the flare nut is the same with that for indoor unit. 3.2.3.5 Thermal Insulation of Pipe Joint (Only for indoor unit) Stick coupler heat insulation (large and small) to the place where connecting pipes.
  • Page 32 Seal the knock-down hole well to prevent insects from entering to the unit. See the following figures. NOTICE: Only for the GUD100W/NhB-S, GUD125W/NhB-S, GUD140W/NhB-S, GUD160W/NhB-S, GUD160W/NhB-X units. 3.2.4 Connection Pipe Vacuum Pumping and Leak Detection 3.2.4.1 Vacuum Pumping NOTICE! Make sure the outlet of vacuum pump is away from fire source and is well-ventilated.
  • Page 33 DC Inverter U-match Series Duct Type Unit Model Time(min) GUD125PH/B-S GUD125PHS/B-S GUD140PH/B-S GUD140PHS/B-S GUD160PH/B-S GUD160PHS/B-S 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.
  • Page 34 DC Inverter U-match Series Duct Type Unit 3.2.4.2 Leak Detection Methods The following leak detection methods are deemed acceptable for systems containing flammable refrigerants. Electronic leak detectors shall be used to detect flammable refrigerants, but the sensitivity may not be adequate, or may need re-calibration (Detection equipment shall be calibrated in a refrigerant-free area).
  • Page 35 20m, 4100g 7.5m, 3600g GUD160W/NhB-S 20m, 4500g ±40g/m 7.5m, 4000g GUD160W/NhB-X 7.5m, 4000g 20m, 4500g NOTICE: The Unit is shipped with a pre-charge refrigerant suitable for pipe length installation as shown in above table. Extra refrigerant (g/m) determined from the table above, MUST be added for each meter that the field installed pipe beyond factory pre-charge pipe length.
  • Page 36 DC Inverter U-match Series Duct Type Unit 3.2.6.1 Indoor Side Drain Pipe NOTICE! Install the drain hose in accordance with the instructions in this installation manual and keep the area warm enough to prevent condensation. Problems with the piping may lead to water leaks. (1) Install the drain hose with downward gradient (1/100 to 1/50) and no risers or traps are used for the hose.
  • Page 37 DC Inverter U-match Series Duct Type Unit (7) When the unit is shipped from the factory, the drain port is defaulted to be the one on the left side (electric box side). (8) When using the drain port on the right side of the unit, reinstall the drain cap to the left side drain port.
  • Page 38 DC Inverter U-match Series Duct Type Unit 3) The whole pipeline should be wound with insulating tape and fixed onto the wall with saddles. If the outdoor unit is above the indoor unit, arrange the pipeline according to the following diagram. 1) Wind the insulating tape from bottom to top.
  • Page 39 DC Inverter U-match Series Duct Type Unit Item Drain pipe Model (outer dimension)(mm) GUD50P/B-S GUD50PS/B-S GUD71PH/B-S GUD71PHS/B-S GUD100PH/B-S GUD100PHS/B-S GUD125PH/B-S GUD125PHS/B-S GUD140PH/B-S GUD140PHS/B-S GUD160PHS/B-S GUD160PH/B-S (2) For the unit with the condensate pump, two drain ports at the bottom are defaulted to be factory plugged with drain caps.
  • Page 40 DC Inverter U-match Series Duct Type Unit The vertical height of the drain hose should be 75mm or less so that it is unnecessary for the drain port to withstand additional force. Unit:mm When multiple drain hoses are used, their installation should be performed as shown in the figure below.
  • Page 41 DC Inverter U-match Series Duct Type Unit 3.2.6.4 Check Drainage After piping work is finished, check if drainage flows smoothly. As shown in the figure, add approximately 1liter of water slowly into the drain pan and check drainage flow during COOL running. 3.2.7 Installation of the Duct 3.2.7.1 Dimensions of the Supply Air Outlet/Return Air Inlet Supply Air Outlet...
  • Page 42 DC Inverter U-match Series Duct Type Unit Supply Air Outlet Return Air Inlet Item Model GUD100PH/B-S GUD100PHS/B-S GUD125PH/B-S GUD125PHS/B-S 1151 1362 GUD140PH/B-S GUD140PHS/B-S GUD160PH/B-S GUD160PHS/B-S 3.2.7.2 Return Air Method (1) The default ex-factory return air method is from the back. The return air cover shall be installed at the bottom of the unit, as is shown in the following figure.
  • Page 43 DC Inverter U-match Series Duct Type Unit 3.2.7.3 Installation of Supply Air Duct and Return Air Duct Installation method shall be selected by entirely considering the conditions of buildings, maintenance, etc.as is shown in the following figure. 3.2.7.4 Installation of Fresh Air Duct (1) While connecting the fresh air duct, cut off the fresh air baffle plate as is shown in the following figure.

  • Page 44: Electrical Installation

    DC Inverter U-match Series Duct Type Unit nail to the air duct, then attach the heat preservation cotton with tinfoil and fix it with plastic nail cover, finally, seal the connection joint with tinfoil tape tightly; other materials with good thermal insulation effect can also be used. Each supply air duct and return air duct shall be fixed on the floor prefabricated slab with iron support;...
  • Page 45 Do not change the power cables arbitrarily. Do not change the length and terminals of the power cables. If you want to change the power cables, please contact Gree’s local service center. Wiring terminals should be connected firmly to the terminal board. Loose connection is forbidden.
  • Page 46 3.15 GUD140W/NhB-S 3.15 GUD160W/NhB-S 3.15 380-415V 3N~ GUD160W/NhB-X 3.15 50/60Hz NOTICE: Fuse is located on the main board. Install a circuit breaker at every power terminal near the units (indoor and outdoor units) with at least 3mm contact gap. The units must be able to be plugged or unplugged.
  • Page 47 DC Inverter U-match Series Duct Type Unit twisted together. To be in compliance EN 55014,it is necessary to use 7.5 meters long wire. The wire gauge of communication cord should not be less than 0.75mm². It’s recommended to use 0.75mm² power cords as the communication cords. 3.3.3 Connection of Power Cord and Communication Cord (1) For solid wires (as shown below): 1) Use wire cutters to cut off the wire end and then peel away about...
  • Page 48 DC Inverter U-match Series Duct Type Unit (3) How to connect the connection wire and power cord. Lead the connection wire and power cord through the insulation tube. Then fix the wires with wire clamps (as shown in the following figure). WARNING! (1) Before working, please check whether the indoor and outdoor units are powered on.
  • Page 49 DC Inverter U-match Series Duct Type Unit (4) Wire between indoor and outdoor units. Single-phase unit: GUD50W/NhB-S, GUD71W/NhB-S. GUD50P/B-S+GUD50W/NhB-S, GUD50PS/B-S+GUD50W/NhB-S Power cords 3×1.5mm² Power cords 3×1.0mm² Communication cords 2×0.75mm² Communication cords 2×0.75mm² Connection wires of DRED module GUD71PH/B-S+GUD71W/NhB-S, GUD71PHS/B-S+GUD71W/NhB-S Power cords 3×2.5mm² Power cords 3×1.0mm²...
  • Page 50 DC Inverter U-match Series Duct Type Unit Single-phase Unit: GUD100W/NhB-S. GUD100PH/B-S+GUD100W/NhB-S, GUD100PHS/B-S+GUD100W/NhB-S Power cords 3×4.0mm² Power cords 3×1.0mm² Communication cords 2×0.75mm² Communication cords 2×0.75mm² Connection wires of DRED module Single-phase Unit: GUD125W/NhB-S, GUD140W/NhB-S, GUD160W/NhB-S.
  • Page 51 Power cords 3×4.0mm² Power cords 3×1.0mm² Communication cords 2×0.75mm² Communication cords 2×0.75mm² Connection wires of DRED module GUD140PH/B-S+GUD140W/NhB-S, GUD140PHS/B-S+GUD140W/NhB-S GUD160PH/B-S+GUD160W/NhB-S, GUD160PHS/B-S+GUD160W/NhB-S Power cords 3×6.0mm² Power cords 3×1.0mm² Communication cords 2×0.75mm² Communication cords 2×0.75mm² Connection wires of DRED module Three-phase Unit: GUD160W/NhB-X.
  • Page 52 DC Inverter U-match Series Duct Type Unit GUD160PH/B-S+GUD160W/NhB-X, GUD160PHS/B-S+GUD160W/NhB-X Power cords 5×1.5mm Power cords 3×1.0mm Communication cords 2×0.75mm² Communication cords 2×0.75mm² Connection wires of DRED module (5) Electrical wiring of indoor unit and outdoor unit. WARNING! (1) High and low voltage wires should be led through different rubber rings of the electric box cover.
  • Page 53 DC Inverter U-match Series Duct Type Unit 1) Indoor side Take off the electric box cover from the sub-assembly of electric box. Then connect the wires. Connect the connection wires of indoor unit according to the corresponding marks. (Expect for GUD125PH/B-S, GUD125PHS/B-S, GUD140PH/B-S, GUD140PHS/B-S, GUD160PH/B-S, GUD160PHS/B-S).
  • Page 54 DC Inverter U-match Series Duct Type Unit Single-phase: GUD50W/NhB-S, GUD71W/NhB-S. A. Wire routing of separated power supply. B. Wire routing of unified power supply. Single-phase: GUD100W/NhB-S, GUD125W/NhB-S. A. Wire routing of separated power supply for single phase.
  • Page 55 DC Inverter U-match Series Duct Type Unit B. Wire routing of unified power supply for single phase. Single-phase: GUD140W/NhB-S. A. Wire routing of separated power supply for single phase.
  • Page 56 DC Inverter U-match Series Duct Type Unit B. Wire routing of unified power supply for single phase.
  • Page 57 DC Inverter U-match Series Duct Type Unit Single-phase: GUD160W/NhB-S. A. Wire routing of separated power supply for single phase.
  • Page 58 DC Inverter U-match Series Duct Type Unit B. Wire routing of unified power supply for single phase.
  • Page 59 DC Inverter U-match Series Duct Type Unit Three -phase: GUD160W/NhB-X. A. Wire routing of separated power supply for three phase.
  • Page 60 DC Inverter U-match Series Duct Type Unit B. Wire routing of unified power supply for three-phase.

  • Page 61: Check After Installation

    DC Inverter U-match Series Duct Type Unit 3.4 Check after Installation Check Items after Installation. Possible events due to improper installation Check items Is the main body installed The unit may fall down, vibrate or produce securely? noise. Did you do water leakage test? Cooling capacity may become unsatisfactory.

  • Page 62: Installation Of Controller

    DC Inverter U-match Series Duct Type Unit (4) If there’s sound of liquid shock when the compressor is running, then stop the air conditioner immediately. Wait until the electric heating belt is heated enough, and then restart the air conditioner. (5) Feel the air flow of the indoor unit to see if it is normal.

  • Page 63: Maintenance

    DC Inverter U-match Series Duct Type Unit 5 Maintenance 5.1 Failures Not Caused by Faults of the AC (1) If your air conditioner fails to function normally, please first check the following items before maintenance: Problem Cause Corrective measure If you turn off the unit and then immediately turn it on, in order to protect the compressor and Please wait for a while.
  • Page 64 DC Inverter U-match Series Duct Type Unit (2) The following situations are not operation failures. Problem Time of occurrence Cause If the unit is running under Mist comes from high humidity, the wet air in During operation. the air conditioner. the room will be quickly cooled down.

  • Page 65: Error Code

    NOTICE: Check the above items and adopt the corresponding corrective measures. If the air conditioner continues to function poorly, please stop the air conditioner immediately and contact Gree’s authorized local service center. Ask our professional service staff to check and repair the unit.
  • Page 66 DC Inverter U-match Series Duct Type Unit Number Error code Error Overload IPM protection DC fan error Driver out-of-step protection Pfc protection Startup failure Compressor phase-sequence protection Power protection IDU and ODU unmatched 4–way valve switch-over error Driver reset protection Over-current protection Master control and driver communication error Driver module sensor error...

  • Page 67: Unit Maintenance

    DC Inverter U-match Series Duct Type Unit 5.3 Unit Maintenance NOTICE! (1) Before cleaning, please make sure the unit is stopped. Cut the circuit breaker and remove the power socket, otherwise, electric shock may occur. (2) Do not wash the air conditioner with water, otherwise fire hazard or electric shock may occur.

  • Page 68: Notice On Maintenance

    (4) If the outdoor unit is rusty, coat the rusty location with paint to prevent it from expanding. 5.3.6 Components Replacement Components are available in Gree agency or Gree distributors nearby. 5.4 Notice on Maintenance 5.4.1 Information on Servicing The manual shall contain specific information for service personnel who shall be instructed to undertake the following when servicing an appliance that employs a flammable refrigerant.
  • Page 69 DC Inverter U-match Series Duct Type Unit 5.4.1.2 Work Procedure Work shall be undertaken under a controlled procedure so as to minimize the risk of a flammable gas or vapour being present while the work is being performed. 5.4.1.3 General Work Area All maintenance staff and others working in the local area shall be instructed on the nature of work being carried out.
  • Page 70 DC Inverter U-match Series Duct Type Unit disperse any released refrigerant and preferably expel it externally into the atmosphere. 5.4.1.8 Checks to the Refrigeration Equipment Where electrical components are being changed, they shall be fit for the purpose and to the correct specification. At all times the manufacturer’s maintenance and service guidelines shall be followed.
  • Page 71 DC Inverter U-match Series Duct Type Unit (2) That no live electrical components and wiring are exposed while charging, recovering or purging the system. (3) That there is continuity of earth bonding. 5.4.2 Repairs to Sealed Components (1) During repairs to sealed components, all electrical supplies shall be disconnected from the equipment being worked upon prior to any removal of sealed covers, etc.
  • Page 72 DC Inverter U-match Series Duct Type Unit 5.4.4 Cabling Check that cabling will not be subject to wear, corrosion, excessive pressure, vibration, sharp edges or any other adverse environmental effects. The check shall also take into account the effects of ageing or continual vibration from sources such as compressors or fans.
  • Page 73 DC Inverter U-match Series Duct Type Unit 5.4.7 Charging Procedures In addition to conventional charging procedures, the following requirements shall be followed. (1) Ensure that contamination of different refrigerants does not occur when using charging equipment. Hoses or lines shall be as short as possible to minimize the amount of refrigerant contained in them.
  • Page 74 DC Inverter U-match Series Duct Type Unit (4) Pump down refrigerant system, if possible. (5) If a vacuum is not possible, make a manifold so that refrigerant can be removed from various parts of the system. (6) Make sure that cylinder is situated on the scales before recovery takes place.

  • Page 75: After-Sales Services

    When oil is drained from a system, it shall be carried out safely. 5.5 After-sales Services Any quality or other issues encountered in the purchased air conditioner, please contact the local Gree after-sales service department.

This manual is also suitable for:

Gud71ph/b-sGud100ph/b-sGud125ph/b-sGud140ph/b-sGud160ph/b-sGud50ps/b-s ... Show all

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