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Gree GMV-VQ280WM/C-X Owner's Manual
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Gree GMV-VQ280WM/C-X Owner's Manual

Gree GMV-VQ280WM/C-X Owner's Manual

Heat recovery dc inverter vrf
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Owner's Manual
Original Instructions
Commercial Air Conditioners
GMV Heat Recovery DC Inverter VRF
Models:
GMV-VQ224WM/C-X
GMV-VQ280WM/C-X
GMV-VQ335WM/C-X
GMV-VQ400WM/C-X
GMV-VQ450WM/C-X
GMV-VQ504WM/C-X
GMV-VQ560WM/C-X
GMV-VQ615WM/C-X
......
GMV-VQ2460WM/C-X

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Summary of Contents for Gree GMV-VQ280WM/C-X

  • Page 1 Owner's Manual Original Instructions Commercial Air Conditioners GMV Heat Recovery DC Inverter VRF Models: GMV-VQ224WM/C-X GMV-VQ280WM/C-X GMV-VQ335WM/C-X GMV-VQ400WM/C-X GMV-VQ450WM/C-X GMV-VQ504WM/C-X GMV-VQ560WM/C-X GMV-VQ615WM/C-X …… GMV-VQ2460WM/C-X...
  • Page 2 (7) The final right to interpret for this instruction manual belongs to Gree Electric Appliances Inc. of Zhuhai.
  • Page 3 Exception Clauses Manufacturer will bear no responsibilities when personal injury or property loss is caused by the following reasons: (1) Damage the product due to improper use or misuse of the product; (2) Alter, change, maintain or use the product with other equipment without abiding by the instruction manual of manufacturer;...
  • Page 4 Contents 1 Safety Notices (Please be sure to abide them) ............1 2 Product Introduction ....................5 2.1 Product Features ......................5 2.2 Product List ........................5 2.3 Names of Main Parts ......................7 2.4 Product Working Principle ....................8 2.5 The Range of Production Working Temperature ..............10 2.6 Standard Parts .........................10 3 Product Installation ....................
  • Page 5 GMV Heat Recovery DC Inverter VRF 1 Safety Notices (Please be sure to abide them) WARNING: If not abide them strictly, it may cause severe damage to the unit or the people. NOTICE: If not abide them strictly, it may cause slight or medium damage to the unit or the people.
  • Page 6 If anything abnormal happens (such as burning smell), please power off the unit and cut off  the main power supply, and then immediately contact Gree appointed service center. If abnormality keeps going, the unit might be damaged and lead to electric shock or fire.
  • Page 7 GMV Heat Recovery DC Inverter VRF use a heating device with open fire in the same room, please always open the door or window to keep the air circulation and avoid the lack of oxygen in the room.) Please do not put the heating device with open fire at the air outlet, or put it under the air conditioner.
  • Page 8 MUST TO DO User is not allowed to repair the unit. Fault service may cause electric shock or fire accidents.  Please contact Gree appointed service center for help. Do not expose the unit to the moist or corrosive circumstances. ...

  • Page 9: Product List

    2 Product Introduction 2.1 Product Features Gree Heat Recovery DC Inverter VRF System adopts inverter compressor technology. By changing the displacement of compressor, stepless capacity regulation can be realized. Various product lineups are provided with capacity range from 22.4kW to 264kW, and indoor units within a same system can operate in cooling or heating mode in the meantime.
  • Page 10 GMV Heat Recovery DC Inverter VRF GMV-VQ22 GMV-VQ28 GMV-VQ33 GMV-VQ40 GMV-VQ45 GMV-VQ50 GMV-VQ56 GMV-VQ61 Model 4WM/C-X 0WM/C-X 5WM/C-X 0WM/C-X 0WM/C-X 4WM/C-X 0WM/C-X 5WM/C-X GMV-VQ1300 ◆ ◆ ◆ WM/C-X GMV-VQ1350 ◆ ◆ ◆ WM/C-X GMV-VQ1410 ◆ ◆ ◆ WM/C-X GMV-VQ1460 ◆ ◆...

  • Page 11: Combinations Of Indoor And Outdoor Units

    (2) The total capacity of indoor units should be within 50%~135% of that of outdoor units. (3) Outdoor units of Gree Heat Recovery DC Inverter VRF System can be connected to multi VRF indoor units, including cassette type unit, one-way cassette type unit, wall-mounted unit and duct type unit.

  • Page 12: Product Working Principle

    The air temperature and humidity in the indoor space is realized by the return air circulation of the indoor unit. 2.4.2 Working principle Diagram System principle diagram of GMV-VQ224WM/C-X,GMV-VQ280WM/C-X,GMV-VQ335WM/C-X Fig.2.4.1...
  • Page 13 GMV Heat Recovery DC Inverter VRF System principle diagram of GMV-VQ400WM/C-X,GMV-VQ450WM/C-X Fig.2.4.2 System principle diagram of GMV-VQ504WM/C-X,GMV-VQ560WM/C-X,GMV-VQ615WM/C-X Fig.2.4.3...

  • Page 14: The Range Of Production Working Temperature

    Heating NOTE! If exceeding the temperature range for working, the product may be damaged, which is not within the warranty range. 2.6 Standard Parts Please use the following standard parts supplied by Gree. Parts for Outdoor Unit Number Name Picture...
  • Page 15 GMV Heat Recovery DC Inverter VRF When the pressure gauge reads 0~0.05MPa, completely close the low pressure side valve (air valve), and then immediately stop operation and cut off the power. (6) When recovering the refrigerant, it is necessary to ensure that the connection pipe can be disassembled only after the liquid valve and the air valve are completely closed and the power is turned off.

  • Page 16: Outdoor Unit Installation

    GMV Heat Recovery DC Inverter VRF 3.2 Outdoor Unit Installation 3.2.1 Product Size Drawing The product photos are only for reference. Please refer to the actual product. Outline and Physical Dimension of GMV-VQ224WM/C-X, GMV-VQ280WM/C-X, GMV-VQ335WM/C-X unit. Unit：mm Fig.3.2.1...
  • Page 17 GMV Heat Recovery DC Inverter VRF Pipe diameter(mm) Name GMV-VQ224WM/C-X GMV-VQ280WM/C-X GMV-VQ335WM/C-X Low pressure gas pipe Φ19.05 Φ22.2 Φ25.4 ① High pressure gas pipe Φ15.9 Φ19.05 Φ19.05 ② Liquid pipe Φ9.52 Φ9.52 Φ12.7 ③ Wire-passing hole (L×W) 196×69 196×69 196×69 ④...

  • Page 18: Select Installation Position

    GMV Heat Recovery DC Inverter VRF Pipe diameter(mm) Name GMV-VQ400WM/C-X GMV-VQ450WM/C-X GMV-VQ504WM/C-X Low pressure gas pipe Φ25.4 Φ28.6 Φ28.6 ① High pressure gas pipe Φ22.2 Φ22.2 Φ25.4 ② Liquid pipe Φ12.7 Φ12.7 Φ15.9 ③ Wire-passing hole (L×W) 234×69 234×69 234×69 ④...
  • Page 19 GMV Heat Recovery DC Inverter VRF Fig.3.2.3 (2) Anti-monsoon installation requirements for unit connecting exhaust duct: Fig.3.2.4 3.2.2.2 Take snow into consideration when installing the outdoor unit When the unit is installed, the snow should be taken into consideration for the height of the base. NOTE: The photo is only for reference.

  • Page 20: Installation Space Requirements

    GMV Heat Recovery DC Inverter VRF Fig.3.2.5 3.2.3 Installation Space Requirements The installation space of the unit should consider the maintenance space of the unit and the ventilation of the unit. Select an installation method according to the actual situation. Fig.3.2.6...
  • Page 21 GMV Heat Recovery DC Inverter VRF Unit：mm Status A+B+C+D a≥300 b≥100 a≥300 Status 1 c≥100 b≥300 d≥500 a≥300 b≥100 a≥300 Status 2 c≥100 b≥300 d≥500 e≥400 e≥100 a≥300 b≥100 c≥100 Status 3 — d≥500 e≥200 f≥600 a≥300 b≥100 c≥100 Status 4 —...
  • Page 22 GMV Heat Recovery DC Inverter VRF Unit：mm Fig.3.2.7 (4) If the unit is installed in the space with four walls, wall height at both side of the unit shall have no limit; wall height at return air side is below 500mm and at the front side is below 1,500mm.
  • Page 23 GMV Heat Recovery DC Inverter VRF Unit：mm Fig.3.2.9 3.2.4 Installation Space Requirements for Equipment Floor When the outdoor unit is installed in the equipment floor, it needs to connect an air exhaust duct. The opening ratio of the shutters in the equipment floor is not less than 60%, and the horizontal angle of louvers is less than 20°.
  • Page 24 GMV Heat Recovery DC Inverter VRF 3.2.6 Shock absorption requirements The outdoor unit should be firmly fixed. Thick rubber sheets or corrugated rubber damping rubber mats with a thickness of 20mm at least and a width of 100mm at least should be placed between the unit and the foundation.
  • Page 25 GMV Heat Recovery DC Inverter VRF R410A Refrigerant System External diameter(mm) Thickness(mm) Type Φ34.90 ≥1.3 1/2H Φ38.10 ≥1.5 1/2H Φ41.30 ≥1.5 1/2H Φ44.5 ≥1.5 1/2H Φ51.4 ≥1.5 1/2H Φ54.1 ≥1.5 1/2H REMARKS: ① The inner and outer surfaces of the pipeline shall be free of pinholes, cracks, skinning, foaming, inclusions, copper powder, carbon deposits, green rust, dirt and severe oxide film, and shall not allow obvious scratches, pits and spots.
  • Page 26 GMV Heat Recovery DC Inverter VRF — Length(m) Remarks Difference between the pipe length from the first indoor branch to the farthest indoor unit and the pipe ≤40 L12-L11 length from the first indoor branch to the nearest indoor unit Length from the first indoor branch to the farthest ≤40 L7+L8+L10+D22...
  • Page 27 GMV Heat Recovery DC Inverter VRF Low pressure gas pipe High pressure gas pipe Outdoor Model Liquid pipe size(mm) size(mm) size(mm) GMV-VQ1350WM/C-X Φ41.3 Φ22.2 Φ34.9 Φ41.3 GMV-VQ1410WM/C-X Φ44.5 Φ22.2 Φ41.3 GMV-VQ1460WM/C-X Φ44.5 Φ22.2 Φ41.3 GMV-VQ1515WM/C-X Φ44.5 Φ22.2 Φ41.3 GMV-VQ1580WM/C-X Φ44.5 Φ22.2 Φ41.3 GMV-VQ1630WM/C-X...
  • Page 28 GMV Heat Recovery DC Inverter VRF Fig.3.3.4 Fig.3.3.5 Fig.3.3.6 (2) The drop and the length of the pipe between the outdoor units are as follows. Unit:m Fig.3.3.7 NOTE： When the distance A+B between the outdoor modules exceeds 2m, U-type oil trap should be added at low-pressure gas pipe and is no more than 2m away from the outdoor manifold, and A+B≤10m.
  • Page 29 GMV Heat Recovery DC Inverter VRF 3.3.5 Size requirement for branch pipe and piping (main pipe) (1) Connection sketch map of single-module system Fig.3.3.8 (2) Connection sketch map of multi-module system Fig.3.3.9...
  • Page 30 Between outdoor unit and the first indoor branch： Pipe between outdoor unit and the first indoor branch Basic module Low pressure gas pipe (mm) Liquid pipe (mm) High pressure gas pipe (mm) GMV-VQ224WM/C-X Φ19.05 Φ9.52 Φ15.9 GMV-VQ280WM/C-X Φ22.2 Φ9.52 Φ19.05 GMV-VQ335WM/C-X Φ25.4 Φ12.7 Φ19.05 GMV-VQ400WM/C-X Φ25.4 Φ12.7...
  • Page 31 GMV Heat Recovery DC Inverter VRF Size of connection pipe between branches of outdoor module Total rated capacity of upstream modules: Q (kW) Low pressure gas pipe (mm) Liquid pipe (mm) High pressure gas pipe (mm) 40.0≥Q>33.5 Φ25.4 Φ12.7 Φ22.2 45.0≥Q>40.0 Φ28.6 Φ12.7...
  • Page 32 GMV Heat Recovery DC Inverter VRF Total rated capacity of Size of connection pipe between branches of mode exchanger downstream indoor units: X Low pressure gas pipe (mm) Liquid pipe (mm) High pressure gas pipe (mm) (kW) < 25.2 X≤28.0 Φ22.2 Φ9.52 Φ19.05...
  • Page 33 GMV Heat Recovery DC Inverter VRF (13) Piping between indoor branches (“l”) Rated capacity of the Size of connection pipe between indoor branches downstream indoor units Gas pipe (mm) Liquid pipe (mm) C(kW) C≤2.8 Φ9.52 Φ6.35 2.8<C≤5.0 Φ12.7 Φ6.35 5.0<C≤14.2 Φ15.9 Φ9.52 14.2<C≤16...
  • Page 34 GMV Heat Recovery DC Inverter VRF Connecting method is as shown in the picture: Fig.3.3.10 3.3.7 Branch selection of indoor unit of mode exchanger (“C1”) Capacity of downstream indoor R410A refrigerant system Model units: X/kW 16＜X≤28 Y-type branch FQ01B/A 3.3.8 Piping size between mode exchanger and downstream indoor unit (“m”) Size of connection pipe between indoor branch and indoor unit should be consistent with the connection pipe of indoor unit.
  • Page 35 GMV Heat Recovery DC Inverter VRF (4) When laying the pipes, be careful not to deform them. The radius of bending parts should be more than 200mm. The pipes can’t be repeatedly bent or stretched, otherwise the material will get harden. Do not bend or stretch the pipe over three times at the same position. (5) Please use a torque wrench to connect union nut on the indoor unit.
  • Page 36 GMV Heat Recovery DC Inverter VRF 1） Y-type manifold, see in Fig.3.4.2. Fig.3.4.2 2） Manifold has several pipe sections with different pipe size, which facilitates to match with various copper pipes. Use pipe cutter to cut in the middle of the pipe section with different pipe size.
  • Page 37 GMV Heat Recovery DC Inverter VRF Unit: mm Fig.3.4.5 3.4.3 Fixation of Manifold (1) There must be three fixing point for both horizontal and vertical installation of the Y-type manifold. Fixing point 1: 100 mm on the main inlet manifold from the welding point Fixing point 2: 200 mm on the main branched pipe from the welding point Fixing point 3: 250 mm on the branched pipe from the welding point Unit: mm...
  • Page 38 GMV Heat Recovery DC Inverter VRF 2) When the diameter of the copper pipe is more than or equal to Φ15.9mm, the wall thickness of the insulation material is no less than 20mm; when the diameter of the copper pipe is less than 15.9mm, the wall thickness of the insulation material is no less than 15mm.
  • Page 39 GMV Heat Recovery DC Inverter VRF NOTE: In the following table, “1” indicates the steel plate ventilation pipe, “2” indicates the outdoor unit, “3”indicates the top cover assembly, “4” indicates the canvas casing and “5” indicates the steel bar. The specific operations are as below: Step Photo Operation instruction...
  • Page 40 GMV Heat Recovery DC Inverter VRF Step Photo Operation instruction Note ① Reinstall the top cover and press the canvas sleeve tightly; Step 4 — ② Fasten the top cover to the unit with self-tapping screws. ① Pull the canvas casing upside down and press it on the butt flange of the steel pipe...
  • Page 41 GMV Heat Recovery DC Inverter VRF 4) The pressure should remain unchanged to be qualified. 5) If it is necessary to maintain pressure for a long time, the pressure should be reduced to 0.5 MPa or less. Long periods of high pressure can cause leakage at the weld site and there is safety hazard.
  • Page 42 GMV Heat Recovery DC Inverter VRF (2) Operation procedures of vacuum drying 1) Before vacuuming, confirm that the stop valves of low pressure gas pipe, high pressure gas pipe and liquid pipe are at closed status. 2) Connect the regulating valve and vacuum pump to the inspection joint of the gas pipe valve and liquid pipe valve valves with a filling tube.

  • Page 43: Additional Refrigerant Charging

    GMV Heat Recovery DC Inverter VRF 3.7 Additional refrigerant charging 3.7.1 Calculation Method of Adding Refrigerant Total refrigerant charging amount R= Pipeline charging amount A + Σ charging amount B of every module. (1) Pipeline charging amount: Pipeline charging amount A= Σ Liquid pipe length × refrigerant charging amount of every 1m liquid pipe Diameter of liquid Φ28.6...
  • Page 44 GMV Heat Recovery DC Inverter VRF refrigerant added to this module is 0kg. So, ∑Refrigerant charging amount B of every module= 0kg. Suppose the Pipeline charging amount A=∑Liquid pipe length×refrigerant charging amount of every 1m liquid pipe = 5kg. Total refrigerant charging amount R = 5+0=5kg. Modular combination of outdoor unit subjects to combinations that is currently available.
  • Page 45 GMV Heat Recovery DC Inverter VRF Fig.3.7.1 Fig.3.7.2 Step 5: Open the high pressure gauge valve (the low pressure gauge valve remains closed), charge the system with refrigerant, and record the weight change of the refrigerant tank. Step 6: When refrigerant tank is over and the refrigerant can’t be charged to the system any more, record the current weight of m2.
  • Page 46 GMV Heat Recovery DC Inverter VRF added amount of refrigerant has not been fully charged into the system, record current total pre-charging amount: m=(m1-m2) +(m3-m4) +…+(mn-1-mn) Remained refrigerant for start-up charging m`=M-m “M” is the calculated total required refrigerant-charging volume. If the amount of pre-charging refrigerant “m”...

  • Page 47: Electrical Installation

    GMV Heat Recovery DC Inverter VRF abide by the safety requirement for preventing refrigerant leakage specified in local laws and regulations. (2) Multi VRF unit adopts R410A refrigerant. When the unit is installed in the place where there are people, the refrigerant must not exceed the maximum allowable concentration. Otherwise, people involved can be stifled by the refrigerant.

  • Page 48: Electrical Parameters

    GMV Heat Recovery DC Inverter VRF the local country. (7) A circuit breaker and a leakage switch that can cut off the power of the entire system must be installed (a single unit must be equipped with a 30 mA leakage switch). (8) Circuit breaker should have both magnetic trip and thermal trip functions so as to protect the unit when short-circuit and overload happens.
  • Page 49 GMV Heat Recovery DC Inverter VRF Capacity of circuit Minimum Recommended wire Combination breaker of each cross-sectional area Model Power spec (cross-sectional area) method combination of grounding wire module (A) GMV-VQ615 380-415V — 10.0×5 3N～ 50/60Hz WM/C-X GMV-VQ680 380-415V 280+400 25+40 2.5+6.0 2.5×5+6.0×5...
  • Page 50 GMV Heat Recovery DC Inverter VRF Capacity of circuit Minimum Recommended wire Combination breaker of each cross-sectional area Model Power spec (cross-sectional area) method combination of grounding wire module (A) GMV-VQ1962 380-415V 2.5×5+10.0×5+10.0×5 280+504+560+615 25+50+50+50 2.5+10.0+10.0+10.0 3N～ 50/60Hz WM/C-X +10.0×5 GMV-VQ2016 380-415V 2.5×5+10.0×5+10.0×5...

  • Page 51: Power Cord Connection

    GMV Heat Recovery DC Inverter VRF 3.8.3 Power Cord Connection 3.8.3.1 Power Cord Installation Procedures Step 1: Pass the external power cord through the wire-passing rubber gasket of the chassis seal board, and connect the power cord’s “L1, L2, L3, N, ”...

  • Page 52: Communication Line Connection

    GMV Heat Recovery DC Inverter VRF NOTE! The maximum connection number “N” of outdoor unit and the maximum connection number “n” of indoor unit are decided by the combination method of outdoor unit. For details, please refer to the part of unit capacity configuration. 3.8.4 Wiring Diagram Refer to the wiring diagram attached on the unit.
  • Page 53 GMV Heat Recovery DC Inverter VRF The connection between the indoor unit and the wired controller is shown as below: Fig.3.9.2 (2) Selection of communication line between outdoor unit and indoor unit. Length of communication Wire diameter Wire type line between Wire standard Remark indoor unit and...
  • Page 54 GMV Heat Recovery DC Inverter VRF Fig.3.9.4 Fig.3.9.5...
  • Page 55 GMV Heat Recovery DC Inverter VRF Fig.3.9.6 Fig.3.9.7...

  • Page 56: Communication Address Setting

    GMV Heat Recovery DC Inverter VRF (2) If a communication wire is not long enough and needs to be connected with another wire by peeling away its outer layer, crimp connection or soldering connection must be adopted. 3.9.4 Communication Address Setting The indoor unit and outdoor unit adopt automatic addressing technology.
  • Page 57 GMV Heat Recovery DC Inverter VRF NOTES! (1) As for modular indoor unit, if there are multiple outdoor unit modules, the master module must be the first outdoor unit module on the communication line, and it must not connect to the indoor unit (main module is set by SA8 of indoor unit main board).
  • Page 58 GMV Heat Recovery DC Inverter VRF Fig.3.9.9 One wired controller controls one IDU Fig.3.9.10 Two wired controllers control one IDU Fig.3.9.11 One wired controller control multiple IDU Fig.3.9.12 Two wired controllers control multiple IDU When two wired controllers control multiple IDUs, the wired controller can be connected to any one IDU, provided that the connected IDU is of the same series.

  • Page 59: Check Items After Installation

    GMV Heat Recovery DC Inverter VRF setup of parameter values. Then the parameter value will blink. Press button or button to select code 02. And then press “confirm/cancel” to finish setting. Press “confirm/cancel” to return to the previous display until you exit from the setup of parameter values.
  • Page 60 GMV Heat Recovery DC Inverter VRF 4 Debugging and Operation NOTES! (1) Do set one (only one) module as the main module during debugging. (2) When there is no special requirement, the other functions do not need to be set, and it can be operated according to the factory settings.
  • Page 61 GMV Heat Recovery DC Inverter VRF (3) When debugging, the front panel of the outdoor unit must be completely closed, otherwise it will affect the accuracy of debugging (as shown in the Fig. as below). Fig.4.2.2 (4) Display instruction for each stage progress at the time of debugging: Instruction for each stage progress at the time of debugging —...
  • Page 62 GMV Heat Recovery DC Inverter VRF Instruction for each stage progress at the time of debugging — Debugging code Progress code Status code LED1 LED2 LED3 Meaning Progress Display Display Display Code Code Code status status status The system has detected “communication malfunction between main control and inverter compressor driver”.
  • Page 63 GMV Heat Recovery DC Inverter VRF Instruction for each stage progress at the time of debugging — Debugging code Progress code Status code LED1 LED2 LED3 Meaning Progress Display Display Display Code Code Code status status status 12_ reserved — function 13/14 Test run under heating mode...
  • Page 64 GMV Heat Recovery DC Inverter VRF 4.3.2 Debugging Through the Main Board of Outdoor Unit When conducting the debugging through the main board of outdoor unit, the main board has the following debugging operation functions. Step 1: Cover all the front panels of the outdoor unit and open the debugging window of each basic module.
  • Page 65 GMV Heat Recovery DC Inverter VRF After 30s of display, the automatic display is as follows; if press SW3 button within 30s, the display is as follows. The unit automatically enters the next step of debugging: — Debugging code Progress code Status code LED1 LED2...
  • Page 66 GMV Heat Recovery DC Inverter VRF If an abnormality is detected, it will stay in the current state and manual troubleshooting is required. The corresponding faults are as below: — Debugging code Progress code Status code LED1 LED2 LED3 Meaning Progress Display Display...
  • Page 67 GMV Heat Recovery DC Inverter VRF — Debugging code Progress code Status code LED1 LED2 LED3 Meaning Progress Display Display Display Code Code Code status status status The system detected that there’s no fault for 07_indoor unit’s indoor unit’s parts. Then parts inspection it will automatically enter into the next step.
  • Page 68 GMV Heat Recovery DC Inverter VRF — Debugging code Progress code Status code LED1 LED2 LED3 Meaning Progress Display Display Display Code Code Code status status status 09_refrigerant The system refrigerant judgment is judgement before normal. It will automatically enter startup into the next step.
  • Page 69 GMV Heat Recovery DC Inverter VRF Step 14: Unit debugging step 11 is “reserved function”. The main module display is as below. The unit automatically enters into the next step. — Debugging code Progress code Status code LED1 LED2 LED3 Meaning Progress Display...
  • Page 70 GMV Heat Recovery DC Inverter VRF Once debugging is completed, resume the standby status and the display is as below: Debugging code Progress code Status code LED1 LED2 LED3 Meaning Display Display Code Code Code Display status status status The complete unit has finished the debugging and it stays at 01~04 standby status.
  • Page 71 GMV Heat Recovery DC Inverter VRF Debugging Parameter Reference Value for GMV Heat Recovery DC Inverter VRF Unit Debugging item Parameter name Unit Reference value Remark ● The normal high pressure value of the system is 20℃~55℃. According to the change of ambient temperature and the change of operating capacity of the system, the high pressure value of the system is...

  • Page 72: Maintenance

    (5) When restart up the unit after it has been stop operation for a long time, turn on the air conditioner's power switch 2 hours before starting the operation to preheat the outdoor compressor crankcase. (6) Check if the outdoor unit is installed firmly. If there is any abnormality, please contact Gree service center.

  • Page 73: Parts Replacement

    — Too many heat resources in the room Reduce heat resources Filter is blocked for dirt Clean the filter NOTE! If problem cannot be solved after checking the above items, please contact Gree service center and show phenomena and models.

  • Page 74: Error Indication

    GMV Heat Recovery DC Inverter VRF Following circumstances are not malfunction. “Malfunction” Reason When unit is started immediately after Overload protection switch makes it run after 3 minutes Unit doesn’t run it is just turned off delay When power is turned on Standby operating for about 1 minute Mist comes from Under cooling...
  • Page 75 GMV Heat Recovery DC Inverter VRF Error Error Type Content Content Code Code Setting of functional DIP switch code is Zero-crossing malfunction of PG motor wrong For single control over multiple units, IDU is Zero-crossing malfunction of PG motor inconsistent (reheating-dehumidifying system) Malfunction of lower water temperature Indoor PCB is poor...
  • Page 76 GMV Heat Recovery DC Inverter VRF Error Error Type Content Content Code Code Current sensor of compressor 5 is Current sensor of compressor 6 is abnormal abnormal Malfunction of casing top temperature sensor Malfunction of DC motor of compressor 1 Malfunction of casing top temperature Malfunction of exit tube temperature sensor sensor of compressor 2...
  • Page 77 GMV Heat Recovery DC Inverter VRF Error Error Type Content Content Code Code Malfunction of driving board of fan Driving board of fan operates abnormally Voltage protection of driving board Reset protection of driving module of fan power of fan Drive PFC protection of fan Over-current protection of inverter fan Malfunction of drive temperature sensor of...

  • Page 78: After Sales Service

    Gree. Warranty should meet the following requirements: (1) First run of the unit should be operated by professional personnel from Gree appointed service center. (2) Only Gree manufactured accessories can be used on the machine.

This manual is also suitable for:

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