Gree GUHN24NK3HO Service Manual
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Gree GUHN24NK3HO Service Manual

U-match
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U-MATCH AIR CONDITIONERS

SERVICE MANUAL

T1/R410A/50Hz
(GC201510 -
)
І

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Summary of Contents for Gree GUHN24NK3HO

  • Page 1: Service Manual

    U-MATCH AIR CONDITIONERS SERVICE MANUAL T1/R410A/50Hz (GC201510 - І...

  • Page 2: Table Of Contents

    CONTENTS PRODUCT ..................................2 1 MODELS LIST ................................2 1.1 Outdoor Unit ..............................2 1.2 Indoor Unit ................................ 3 2 NOMENCLATURE ..............................4 2.1 Outdoor Unit ..............................4 2.2 Intdoor Unit ............................... 4 3 PRODUCT DATA ..............................5 3.1 Product Data of Indoor Unit ......................... 5 3.2 Operation Range ............................
  • Page 3 3.1 Outdoor unit ..............................80 3.2 Indoor unit ..............................82 4. DISASSEMBLY AND ASSEMBLY PROCEDURE OF MAIN PARTS ............85 4.1 Outdoor Unit ..............................85 4.2 Indoor Unit ..............................90 5 EXPLODED VIEWS AND SPARE PART LIST ....................97 5.1 Outdoor Unit ..............................97 5.2 Indoor Unit ..............................
  • Page 4 U-Match Series Service Manual PRODUCT...

  • Page 5: Product

    U-Match Series Service Manual PRODUCT 1 MODELS LIST 1.1 Outdoor Unit Power Supply Model Name Product Code Appearance (V, Ph, Hz) GUHN18NK3HO CF021W2090 220-240V~ 50Hz GUHN24NK3HO CF021W2100 220-240V~ 50Hz GUHN30NK3HO CF021W2110 220-240V~ 50Hz GUHN36NM3HO CF021W2080 380-415V 3N~ 50Hz GUHN42NM3HO CF021W2070 380-415V 3N~ 50Hz...

  • Page 6: Indoor Unit

    U-Match Series Service Manual 1.2 Indoor Unit Nominal Capacity Power Type Model Name Product Code Cooling/Heating Supply Appearance (kW) (V, Ph, Hz) GFH18K3HI CF022N0830 5.0/5.4 220-240V~ 50Hz GFH18K3H1I CF022N0840 5.0/5.4 220-240V~ 50Hz GFH24K3HI CF022N0880 7.0/7.4 GFH24K3H1I CF022N0870 7.0/7.4 220-240V~ 50Hz GFH30K3HI CF022N0850 8.3/8.8...

  • Page 7: Nomenclature

    U-Match Series Service Manual 2 NOMENCLATURE 2.1 Outdoor Unit Description Options Gree Electric Appliances Inc Capital Letter :G Unit Type U=U-Match Outdoor Unit C=Cool Only Product Type H=Heat Pump without Aux Electric Heaters N=Constant Frequency Compressor Power Supply D=DC Inverter...

  • Page 8: Product Data

    3.1.1 Duct Type Indoor unit GFH18K3HI GFH18K3H1I GFH24K3HI GFH24K3H1I Product Code CF022N0830 CF022N0840 CF022N0880 CF022N0870 Model Outdoor unit GUHN18NK3HO GUHN18NK3HO GUHN24NK3HO GUHN24NK3HO Product Code CF021W2090 CF021W2090 CF021W2100 CF021W2100 Cooling Capacity Capacity Heating Capacity Cooling Power Input Heating EER / COP 2.5/2.8...
  • Page 9 U-Match Series Service Manual Indoor unit GFH30K3HI GFH30K3H1I GFH36K3HI GFH36K3H1I Product Code CF022N0850 CF022N0860 CF022N0820 CF022N0810 Model Outdoor unit GUHN30NK3HO GUHN30NK3HO GUHN36NM3HO GUHN36NM3HO Product Code CF021W2110 CF021W2110 CF021W2080 CF021W2080 Cooling Capacity 10.0 10.0 Capacity Heating Capacity 11.5 11.5 Cooling Power Input Heating EER / COP 2.9/3.2...
  • Page 10 U-Match Series Service Manual Indoor unit GFH42K3HI GFH42K3H1I GFH48K3HI GFH48K3H1I Product Code CF022N0790 CF022N0800 CF022N0770 CF022N0780 Model Outdoor unit GUHN42NM3HO GUHN42NM3HO GUHN48NM3HO GUHN48NM3HO Product Code CF021W2070 CF021W2070 CF021W2060 CF021W2060 Cooling Capacity 12.0 12.0 14.0 14.0 Capacity Heating Capacity 13.5 13.5 15.0 15.0 Cooling...
  • Page 11 U-Match Series Service Manual Indoor unit GFH60K3HI GFH60K3H1I Product Code CF022N0750 CF022N0760 Model Outdoor unit GUHN60NM3HO GUHN60NM3HO Product Code CF021W2050 CF021W2050 Cooling Capacity 16.0 16.0 Capacity Heating Capacity 18.0 18.0 Cooling Power Input Heating EER / COP 2.8/3.2 2.8/3.2 Indoor Unit GFH60K3HI GFH60K3H1I Power Supply...
  • Page 12 U-Match Series Service Manual 3.1.2 Cassette Type Indoor unit GKH18K3HI GKH24K3HI GKH30K3HI GKH36K3HI Product Code ET010N1090 ET010N1110 ET010N1100 ET010N1080 Model Outdoor unit GUHN18NK3HO GUHN24NK3HO GUHN30NK3HO GUHN36NM3HO Product Code CF021W2090 CF021W2100 CF021W2110 CF021W2080 Cooling Capacity 10.0 Capacity Heating Capacity 11.5 Cooling Power Input Heating EER / COP 2.5/2.8...
  • Page 13 U-Match Series Service Manual Indoor unit GKH42K3HI GKH48K3HI GKH60K3HI Product Code ET010N1070 ET010N1060 ET010N1050 Model Outdoor unit GUHN42NM3HO GUHN48NM3HO GUHN60NM3HO Product Code CF021W2070 CF021W2060 CF021W2050 Cooling Capacity 12.0 14.0 15.0 Capacity Heating Capacity 13.5 14.8 16.8 Cooling Power Input Heating EER / COP 2.8/3.3 2.9/3.0...

  • Page 14: Operation Range

    Table 1-4-1 Electrical Data of Outdoor Unit Min. Compressor Fan Motor Fuse/Breaker Power Power Capacity Supply Model Qty. Supply Cord − V/Ph/Hz GUHN18NK3HO 220-240,1,50 <1 5/13 GUHN24NK3HO 220-240,1,50 11.3 <1 5/20 GUHN30NK3HO 220-240,1,50 5/20 12.7 <1 GUHN36NM3HO 380-415,3,50 5/13 <1 GUHN42NM3HO 380-415,3,50 <1 5/13 GUHN48NM3HO 380-415,3,50 <1...
  • Page 15 U-Match Series Service Manual 3.3.2 Indoor unit Table 1-4-2 Electrical Data of Indoor Unit Power Fan Motor Fuse/Breaker Min. Power Supply Capacity Supply Cord Model V/Ph/Hz GFH18K3HI 220-240,1,50 <1 GFH18K3H1I 220-240,1,50 <1 GFH24K3HI 220-240,1,50 <1 GFH24K3H1I 220-240,1,50 <1 GFH30K3HI 220-240,1,50 <1 GFH30K3H1I 220-240,1,50...

  • Page 16: Piping Diagram

    U-Match Series Service Manual 4 PIPING DIAGRAM...
  • Page 17 U-Match Series Service Manual CONTROL...

  • Page 18: Control

    U-Match Series Service Manual CONTROL 1 OPERATION FLOWCHART 1.1 Cooling/Dry Operation...

  • Page 19: Heating Operation

    U-Match Series Service Manual 1.2 Heating Operation...

  • Page 20: Wireless Remote Controller

    U-Match Series Service Manual 2 WIRELESS REMOTE CONTROLLER 2.1 Operation and Display View Table 2-2-1 Operation instruction of wireless remote controller Name Function Description Signal  Signal transmitter transmitter  Press this button and the unit will be turned on; press it once more and the unit will be turned off. ON/OFF When turning off the unit, the Sleep function will be canceled, but the presetting time is still button...
  • Page 21 U-Match Series Service Manual  By pressing this button, Auto, Low, Middle, High speed can be circularly selected. After power on, Auto fan speed is default.  Low speed button Middle speed High speed Note: Under the DRY mode, the fan will be kept running at the low speed and the fan speed isn't adjustable.

  • Page 22: Wired Controller

    U-Match Series Service Manual  In the Cool or Heat mode, pressing this button can activate or deactivate the TURBO function. TURBO When the TURBO function is activated, its symbol will be displayed; when the running button mode or the fan speed is changed, this function will be canceled automatically. (This function is applicable to partial of models).
  • Page 23 U-Match Series Service Manual Table 2-3-1 Instruction to LCD Display Icons Introduction Left and right swing function Up and down swing function Air exchange function Sleep function Auto mode COOL mode DRY mode FAN mode HEAT mode Health function I-Demand function Vacation function Status display of master and slave wired controller Shield function...

  • Page 24: Operation View

    U-Match Series Service Manual 3.2 Operation View 3.2.1 Silk Screen of Buttons Figure 2-3-3 Silk screen of buttons 3.3.2 Instruction to Function of Buttons Table 2-3-2 Instruction to buttons of wired controller Description Functions  Function selection and canceling;  Press it for 5s to view the ambient temperature; press Mode button to Enter/Cancel select viewing outdoor ambient temperature or indoor ambient temperature.
  • Page 25 U-Match Series Service Manual 1 Enter/Cancel Setting of master Under off state of the unit, press Enter/Cancel and Mode buttons at the same time for 5s to set master and slave wired controller. Press ▲ or ▼ button to and slave wired 4 Mode controller adjust.
  • Page 26 U-Match Series Service Manual 3.2.3.2 Setting of Master/Slave Wired Controller’s Address Under off status of the unit, press Enter/Cancel and Mode buttons at the same time for 5s to go to the enquiry and setting interface of master/slave wired controller. In this case, LCD displays wired controller‟s address (01 for master wired controller and 02 for slave wired controller).

  • Page 27: Operation Instruction Of Special Functions

    U-Match Series Service Manual 4 OPERATION INSTRUCTION OF SPECIAL FUNCTIONS 4.1 Door Control Function Door control function can be selected (More details please refer to Debugging Function). When door control function is selected, the wired controller will work when the room card is inserted and stop working when the room card is not inserted.

  • Page 28: Installation Of Wired Controller

    U-Match Series Service Manual off during installation. (5) In order to avoid abnormal operation due to electromagnetic interference, etc., pay attention to the following notes during connecting wires: Make sure the tie-in interface of communication wire is correct, otherwise it may lead to communication malfunction.

  • Page 29: Removal Of Wired Controller

    U-Match Series Service Manual 5.4 Removal of Wired Controller Figure 2-5-3 Removal of wired controller 6 TROUBLESHOOTING 6.1 Display of Error Code Table 2-6-1 Error Code List Error Code Error Compressor high pressure protection Freeze protection Compressor low pressure protection, refrigerant lacking protection, refrigerant recycling mode Compressor high discharge temperature protection Communication malfunction...

  • Page 30: Centralized Controller

    U-Match Series Service Manual Figure 2-6-1 7 CENTRALIZED CONTROLLER 7.1 Smart Zone Controller 7.1.1 Function The smart zone controller can directly control up to 16 sets of indoor units in a control network and is available to check the running status of any unit through the LCD, including running mode, timer, fan speed, centralized control and shielding setting etc.
  • Page 31 U-Match Series Service Manual 7.1.3 Functions of Press Buttons Table 2-7-1 Functions of Press Buttons Name Function Description Mode It is used for the switchover among different modes. It is used to set the fan speed, high, medium, low or auto. On/Off It is used to set the on/off status of the indoor unit.
  • Page 32 U-Match Series Service Manual 7.1.4.2 Introduction to Symbols on the LCD Figure 2-7-3 Table 2-7-2 Introduction to the Symbols on the LCD Name Description Fan speed It displays the fan speed of the indoor unit, high, medium, low an d auto. Running mode It displays the running mode of the indoor unit, auto, cool, dry, fan and heat.

  • Page 33: Additional Special Functions

    7.2.1 Door control function Door control function is available for this series. In order to achieve this function, please select the door control accessories from Gree. (1) Interface instructions The interface printing is DOOR-C and the type is B2B-XH-B. The wires of door control accessories must be connected to this interface;...
  • Page 34 U-Match Series Service Manual Table 2-7-3 Door control wiring port Terminal name Terminal instruction CN1 wiring terminal and door control interface of indoor mainboard X1(AC-L, AC-N) wiring terminal, connected to door control input X1(AC-L, AC-N) signal, rated voltage 220V. X2 wiring terminal, connected to door control input signal (2) Function instructions: In order to achieve this function, set it through wired controller and refer to the following operation method.
  • Page 35 U-Match Series Service Manual 7.2.2 MODBUS interface The indoor unit of this series has MODBUS interface. If the user needs to connect the unit to the management system of the building, please enquire Gree for the MODBUS protocol. Figure 2-7-8 (1) Interface instruction: The printing is COM-BMS1 and the interface type is B4B-XH-K3;...
  • Page 36 U-Match Series Service Manual Figure 2-7-9 Address setting of each unit: when the address mode is set to be long-distance control address mode. The address setting value range is 01~255. The setting method is: Under off state of the unit, press Function and Mode buttons at the same time for 5s to enter setting interface of wired controller address.
  • Page 37 U-Match Series Service Manual Figure 2-7-10 Note: ① In order to realize the MODBUS interface function, the address mode of the unit must be set into long-distance control address mode; you can not set it into centralized control address mode, otherwise, this function can not be realized;...
  • Page 38 U-Match Series Service Manual INSTALLATION...

  • Page 39: Installation

    U-Match Series Service Manual INSTALLATION 1 INDOOR UNIT INSTALLATION 1.1 Installation of Duct Type 1.1.1 Before Installation After receiving the machine, please check for any transport damage. If finding any surface or internal damage, please immediately report to the transport company or equipment company in writing. After receiving the machine, please check the unit and accessories in reference to the packing list.
  • Page 40 U-Match Series Service Manual Figure 3-1-1 Figure 3-1-2 Figure 3-1-3 Install the hanger onto the indoor unit as Figure 3-1-2 and Figure 3-1-3 shows. Install the indoor unit at the ceiling as Figure Figure 3-1-4 shows. Figure 3-1-4 Precautions for unfavorable installation: The preparation of all pipes (connecting pipes and drainage pipes) and cables (connecting lines of wire controller, indoor unit and outdoor unit) must be ready before the installation, so as to achieve smooth installation.
  • Page 41 U-Match Series Service Manual condensate. Figure 3-1-5 1.1.4 Dimension Data For the units: 18K Figure 3-1-6...
  • Page 42 U-Match Series Service Manual For the units: 24~60K Figure 3-1-7 Table 3-1-1 Item Model GFH18K3HI 1015 GFH18K3H1I GFH24K3HI GFH24K3H1I 1101 1159 1260 1002 GFH30K3HI GFH30K3H1I GFH36K3HI GFH36K3H1I GFH42K3HI 1011 1115 1230 GFH42K3H1I GFH48K3HI GFH48K3H1I GFH60K3HI 1011 1115 1235 GFH60K3H1I...
  • Page 43 U-Match Series Service Manual Table 3-1-2 Installation Accessories List for Duct-type Indoor Unit Name & Shape Notes Installation and Operating Instructions Insulation materials for gas pipe Used for gas pipe connector on indoor unit Insulation materials for liquid pipe Used for liquid pipe connector on indoor unit Insulation materials for drainage pipe Used for wrapping the condensate pipe and rubber plug.

  • Page 44: Installation Clearance Data

    U-Match Series Service Manual 1.1.5 Installation Clearance Data Figure 3-1-8 Warning: The height of installation for the indoor unit should be 2.5m above. 1.1.6 Drain Piping Work Installation of Drainage Pipeline: CAUTION! Install the drain hose in accordance with the instructions in this installation manual and keep the area warm enough to prevent condensation.
  • Page 45 U-Match Series Service Manual Figure 3-1-10 Figure 3-1-11 Figure 3-1-12 (5) Use a suitable drain hose, and see Table 3-2-4 for its size. (6) There is a drain port on both the left and right sides. Select the drain port to match the local conditions. (Figure 3-1-11) (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);...
  • Page 46 U-Match Series Service Manual Figure 3-1-14 Figure 3-1-15 (11) There is adhesive on one side of the insulation so that after removing the protective paper over it the insulation can be directly attached to the drain hose. (12) Considerations for the unit with the condensate pump: For the unit with the condensate pump, only one drain port at the side close to the electric box is prepared and only through it the drain hose can be connected.
  • Page 47 U-Match Series Service Manual Figure 3-1-18 1.1.7 Installation of air duct Dimensions of the Supply Air Outlet/Return Air Inlet Figure 3-1-19 Supply Air Outlet Figure 3-1-20 Return Air Inlet...
  • Page 48 U-Match Series Service Manual Table 3-1-3 Supply Air Outlet Return Air Inlet Item Model GFH18K3HI GFH18K3H1I GFH24K3HI GFH24K3H1I GFH30K3HI GFH30K3H1I GFH36K3HI 1000 GFH36K3H1I GFH42K3HI 1000 GFH42K3H1I GFH48K3HI 1000 GFH48K3H1I GFH60K3HI GFH60K3H1I 1.1.8 Installation of the Supply Air Duct (1) Installation of the Rectangular Duct. Name Name Hanger...

  • Page 49: Installation Of Cassette Type

    U-Match Series Service Manual (3) If the bottom return air is desired, just change the place of the rectangular flange and the return air cover plate. (4) Connect one end of the return air duct to the return air outlet of the unit by rivets and the other to the return air louver.
  • Page 50 U-Match Series Service Manual Ensure that the place of installation is far from the area where the inflammable or explosive substances are stored, thus to avoid possible explosion or fire due to leakage. 1.2.2 Installation Site Select an installation site where the following conditions are fulfilled and that meets your customer's approval.
  • Page 51 U-Match Series Service Manual 1.2.3 Installing the Main Body Unit Figure 3-1-25 (1) Install the hoisting stand on the hoisting screw by using nuts and gaskets at both the upper and lower sides of the hoisting stand. To prevent the gasket from breaking off, a gasket anchor board can be helpful.

  • Page 52: The Panel Installation

    U-Match Series Service Manual 1.2.5 Leveling The water level test must be done after installing the indoor unit to make the unit is horizontal, as shown below. Figure 3-1-29 1.2.6 The Panel Installation (1) See the figure below for the relationship of the front panel and the connecting pipe. Figure 3-1-30 (2) Place the panel at the unit, and latch the hooks beside and opposite the swing flap motor.
  • Page 53 U-Match Series Service Manual Figure 3-1-31 (7) Improper screwing of the screws may cause the troubles shown in Figure 3-1-32. Figure 3-1-32 (8) If gap still exists between ceiling and decoration panel after tightening the screws, readjust the height of the indoor unit. (Figure 3-1-33) Figure 3-1-33...
  • Page 54 U-Match Series Service Manual (9) Wire the swing flap motor as shown in Figure 3-1-34. Figure 3-1-34 1.2.7 Dimension Data For the units: 18k Bottom face of ceiling Figure 3-1-35 Table 3-1-7 Item Model GKH18K3HI...
  • Page 55 U-Match Series Service Manual For the units: 24~60K Figure 3-1-36 Table 3-1-8 Item Model GKH18K3HI GKH24K3HI GKH30K3HI GKH36K3HI GKH42K3HI GKH48K3HI GKH60K3HI 1.2.8 Installation of Drain Piping (1) Keep piping as short as possible and slope it downwards at a gradient of at least 1/100 so that air may not remain trapped inside the pipe.
  • Page 56 U-Match Series Service Manual Tighten the clamp until the screw head is less Insulate the pipe clamp and the drain hose then 4 mm from the hose. using heat insulation sponge. ①. Metal clamp ①. Metal clamp (accessory) ②. Drain hose (accessory) ②.
  • Page 57 U-Match Series Service Manual NO.2: Attach the drain elbow as shown in Figure 3-1-43. NO.3: Attach the horizontal pipe as shown in Figure 3-1-44. Figure 3-1-42 Figure 3-1-43 Figure 3-1-44 1.2.10 Precautions When Doing Riser Piping Work (1) Make sure that heat insulation work is executed on the following 2 spots to prevent any possible water leakage due to dew condensation.

  • Page 58: Outdoor Unit Installation

    U-Match Series Service Manual have to withstand additional force. Figure 3-1-47 1.2.11 Testing of Drain Piping After piping work is finished, check if drainage flows smoothly. Shown in the Figure 3-1-48, Add approximately 1liter of water slowly into the drain pan and check drainage flow during COOL running. Figure 3-1-48 2 OUTDOOR UNIT INSTALLATION 2.1 Before Installation...

  • Page 59: Installation Site

    U-Match Series Service Manual substances are stored, thus to avoid possible explosion or fire due to leakage. 2.2 Installation Site WARNING ①. Install the unit where it will not be tilted by more than 5° . ②. During installation, if the outdoor unit has to be exposed to strong wind, it must be fixed securely. If possible, do not install the unit where it will be exposed to direct sunlight.

  • Page 60: Dimension Data

    The installing dimension shall comply with the installation requirements in these instructions. The outdoor unit must be fixed at the installing position. The installation shall be done by specialist technicians. 2.4 Dimension Data Figure 3-2-2 Table 3-2-1 Unit: mm Item Model GUHN18NK3HO GUHN24NK3HO GUHN30NK3HO GUHN36NM3HO GUHN42NM3HO 1120 1100 GUHN48NM3HO 1120 1100 GUHN60NM3HO...

  • Page 61: Refrigeration Piping Work

    U-Match Series Service Manual 3 REFRIGERATION PIPING WORK 3.1 Refrigeration Piping Work Procedures and Caution in Connecting 3.1.1 Flare Processing (1) Cut the connection pipe with the pipe cutter and remove the burrs. (2) Hold the pipe downward to prevent cuttings from entering the pipe. (3) Remove the flare nuts at the stop valve of the outdoor unit and inside the accessory bag of the indoor unit, then insert them to the connection pipe, after that, flare the connection pipe with a flaring tool.
  • Page 62 U-Match Series Service Manual 3.1.3 Connecting the Pipe at the Indoor Unit Side Detach the caps and plugs from the pipes. CAUTION! ①. Be sure to apply the pipe against the port on the indoor unit correctly. If the centering is improper, the flare nut cannot be tightened smoothly.

  • Page 63: Vacuum And Gas Leakage Inspection

    U-Match Series Service Manual CAUTION! Be sure to connect the gas pipe after connecting the liquid pipe completely. 3.1.4 Connecting the Pipe at the Outdoor Side Unit Tighten the flare nut of the connection pipe at the outdoor unit valve connector. The tightening method is the same as that as at the indoor side.
  • Page 64 U-Match Series Service Manual (4) Open the switch at the lower pressure side of the manifold valve assembly and start the vacuum pump. Meanwhile, the switch at the high pressure side of the manifold valve assembly should be kept closed, otherwise evacuation would fail. (5) The evacuation duration depends on the unit‟s capacity, generally, 20 minutes for the 18k units, 30 minutes for the 24/30/36k units, 45 minutes for the 42/48/60k units.

  • Page 65: Specification Of Connection Pipe

    Drainage pipe(Outer Length between Indoor Unit and Diameter × wall thickness) Model Outdoor Unit (m) (mm) Liquid Φ16X2.0 GUHN18NK3HO Φ16X2.0 GUHN24NK3HO Φ16X2.0 GUHN30NK3HO Φ16X2.0 GUHN36NM3HO Φ16X2.0 GUHN42NM3HO Φ16X2.0 GUHN48NM3HO Φ16X2.0 GUHN60NM3HO The connection pipe should be insulated with proper water-proof insulating material.

  • Page 66: Electric Wiring Work

    U-Match Series Service Manual 4 ELECTRIC WIRING WORK 4.1 Wiring Precautions WARNING ①. Before obtaining access to terminals, all supply circuits must be disconnected. ②. The rated voltage of the unit is as shown as Table 1-4-1 and Table 1-4-2 ③.
  • Page 67 U-Match Series Service Manual Figure 3-2-6 Figure 3-2-7 Figure 3-2-8 (3) How to fix connection cord and power cord by cord clamp After passing the connection cord and power cord through the insulation tube, fasten it with the cord clamp. (Figure 3-2-8) WARNING ①.
  • Page 68 ①. Power cord 3×2.5 mm (H07RN-F) ②. Power cord 3×1.0 mm (H05VV-F) ③. Communication Cords 2×0.75 mm (H05VV-F) GUHN24NK3HO + GFH24K3HI/GFH24K3H1I GUHN30NK3HO + GFH30K3HI/GFH30K3H1I ①. Power cord 3×4.0 mm (H07RN-F) ②. Power cord 3×1.0 mm (H05VV-F) ③. Communication Cords 2×0.75 mm...
  • Page 69 ②. Power cord 3×1.0 mm (H05VV-F) ③. Communication Cords 2×0.75 mm (H05VV-F) Single-phase units (24~30k) Casssete Type Unit GUHN24NK3HO + GKH24K3HI GUHN30NK3HO + GKH30K3HI ①. Power cord 3×4.0 mm (H07RN-F) ②. Power cord 3×1.0 mm (H05VV-F) ③. Communication Cords 2×0.75 mm...
  • Page 70 U-Match Series Service Manual GUHN36NM3HO + + GKH36K3HI ①. Power cord 5×1.5 mm (H07RN-F) ②. Power cord 3×1.0 mm (H05VV-F) ③. Communication Cords 2×0.75 mm (H05VV-F) GUHN42NM3HO + GKH42K3HI GUHN48NM3HO + GKH48K3HI GUHN60NM3HO + GKH60K3HI ①. Power cord 5×2.5 mm (H07RN-F) ②.
  • Page 71 U-Match Series Service Manual ⑤. Tighten the indoor/outdoor connection cord and power cord respectively on the terminal boards with screws. Faulty connection may cause a fire. ⑥. If the indoor unit connection cord (to the outdoor unit) and power supply are wired incorrectly, the air conditioner may be damaged.
  • Page 72 U-Match Series Service Manual MAINTENANCE...

  • Page 73: Maintenance

    U-Match Series Service Manual MAINTENANCE 1 TROUBLE TABLE 1.1 Main Control Malfunction Table 1 Fault Display on Indoor Wired Controller Origin of Error Malfunction malfunction Control description code name signal When outdoor unit detects the high pressure switch is cut off for 3s successively, high pressure protection will occur.
  • Page 74 U-Match Series Service Manual Origin of Error Malfunction malfunction Control description code name signal If the outdoor ambient temperature sensor is detected of open circuit or Malfunction of Outdoor short circuit for 5s successively, outdoor ambient temperature sensor outdoor ambient malfunction will be reported.

  • Page 75: Flow Chart Of Troubleshooting

    U-Match Series Service Manual 2 FLOW CHART OF TROUBLESHOOTING 2.1 Troubleshooting Flow Chart of Main Control Malfunction  E1 High Pressure Protection  E2 Freeze Protection Freeze protection is normal protection but not abnormal malfunction. If freeze protection occurs frequently during operation, please check if the indoor filter is with filth blockage or if the indoor air outlet is abnormal.
  • Page 76 U-Match Series Service Manual ① If enter refrigerant recycling mode through special operation, the displayed E3 is not an error code. It will be eliminated when exiting refrigerant recycling mode. ② If you do not want to have refrigerant lacking protection, you can enter the debugging mode through wired controller and then cancel the refrigerant lacking protection mode.
  • Page 77 U-Match Series Service Manual  E4 Discharge Protection  E6 Communication Malfunction...
  • Page 78 U-Match Series Service Manual  E9 Full Water Protection E9 protection Short circuit the full water If the unit is protection interface on indoor installed with mainboard according to the circuit water pump diagram Check if the water pump Replace the water pump works normally Replace the full water switch or make sure the float of full...
  • Page 79 U-Match Series Service Manual  F1 Malfunction of Evaporator Temperature Sensor  F2 Malfunction of Condenser Temperature Sensor...
  • Page 80 U-Match Series Service Manual  F3 Malfunction of Outdoor Ambient Temperature Sensor  F4 Malfunction of Discharge Temperature Sensor...

  • Page 81: Interface

    U-Match Series Service Manual  F5 Malfunction of Wired Controller Temperature Sensor 2.2 Interface GUHN18NK3HO/GUHN24NK3HO/GUHN30NK3HO Main Control Board...
  • Page 82 U-Match Series Service Manual SILK-SCREEN INTERFACE INTERFACE INSTRUCTION AC-N Neutral wire input Neutral wire input HEAT Compressor electrical heater Compressor electric heating belt 4WAY 4-way valve 4-way valve OFAN1 AC fan motor AC fan motor Electronic expansion valve line Interface of electronic expansion valve: 1 to 4-pin: Drive impulse output;5-pin: 1 to 4-pin: Drive impulse output;...

  • Page 83: Wiring Diadram

    U-Match Series Service Manual SILK-SCREEN INTERFACE INTERFACE INSTRUCTION AC-N Neutral wire input Neutral wire input HEAT Compressor electrical heater Compressor electric heating belt 4WAY 4-way valve 4-way valve OFAN1 AC fan motor 1 AC fan motor 1 Electronic expansion valve line Interface of electronic expansion valve: 1 to 4-pin: Drive impulse output;5-pin: 1 to 4-pin: Drive impulse output;...
  • Page 84 U-Match Series Service Manual Model: GUHN24NK3HO, GUHN30NK3HO Model: GUHN36NM3HO, GUHN42NM3HO, GUHN48NM3HO,GUHN60NM3HO...

  • Page 85: Indoor Unit

    U-Match Series Service Manual 3.2 Indoor unit The actual wiring should always refer to the wiring diagram of the unit. 3.2.1 Duct Type  Model:GFH18K3HI,GFH24K3HI,GFH30K3HI,GFH36K3HI,GFH42K3HI,GFH48K3HI,GFH60K3HI  Model: GFH18K3H1I, GFH24K3H1I, GFH30K3H1I, GFH36K3H1I, GFH42K3H1I, GFH48K3H1I, GFH60K3H1I...
  • Page 86 U-Match Series Service Manual 3.2.2 Cassette Type  Model: GKH18K3HI  Model: GKH24K3HI, GKH30K3HI, GKH36K3HI, GKH42K3HI, GKH48K3HI...
  • Page 87 U-Match Series Service Manual  Model: GKH60K3HI...

  • Page 88: Disassembly And Assembly Procedure Of Main Parts

    U-Match Series Service Manual 4. DISASSEMBLY AND ASSEMBLY PROCEDURE OF MAIN PARTS 4.1 Outdoor Unit  18/24k Disassembly and Assembly of external casing Remark : Step Illustration Handling Instruction 1. Remove the top cover and 1. Remove external handle; casing 2.
  • Page 89 U-Match Series Service Manual Assemble the unit in the 4. Assemble unit reverse procedures of disassembly.  30k Disassembly and Assembly of external casing Remark : Step Illustration Handling Instruction 1. Remove the top cover and handle; 1. Remove external 2.
  • Page 90 U-Match Series Service Manual Assemble the unit in the 4. Assemble unit reverse procedures of disassembly.  36k Disassembly and Assembly of external casing Remark : Step Illustration Handling Instruction 1. Remove the top cover and 1. Remove external handle; casing 2.
  • Page 91 U-Match Series Service Manual 1. Discharge the refrigerant inside the pipeline and recycle the refrigerant during discharging; 2. Unsolder the 4-way valve 4. Remove compressor assy from compressor; 3. Remove the nut fixing compressor; 4. Take away the compressor from chassis. Assemble the unit in the 5.
  • Page 92 U-Match Series Service Manual 1. Discharge the refrigerant inside the pipeline and recycle the refrigerant during discharging; 3. Remove gas liquid 2. Unsolder the 4-way valve separator. assy from gas liquid separator; 3. Remove the gas liquid separator. 1. Discharge the refrigerant inside the pipeline and recycle the refrigerant during discharging;...

  • Page 93: Indoor Unit

    U-Match Series Service Manual 4.2 Indoor Unit 4.2.1 Duct type Removal and Assembly of Fan Motor Remarks: Before removing the fan, make sure to cut off the power firstly. Step Illustration Handling Instruction Cut off the power supply of indoor unit. Use 1.
  • Page 94 U-Match Series Service Manual 7. Assemble the unit in Assemble the unit in reverse reverse to the to the disassembly disassembly procedures and energize it procedures for testing. Disassembly of filter screen for return air. Remark: Make sure that the power supply is cut off before disassembling and protect all the parts during disassembly.
  • Page 95 U-Match Series Service Manual Disassembly of water-containing plate Remark: Make sure that the power supply is cut off before disassembling and protect all the parts during disassembly. Step Illustration Handling Instruction Disassemble the fastening screws on the cover plate and remove the cover plate. (As is shown in the graph, circle represents 6 fastening 1.
  • Page 96 U-Match Series Service Manual Disassembly of evaporator Remark: Make sure that the power supply is cut off and protect the copper tube and aluminum fin. If the time for disassembly shall be long, put the copper tube under pressurized condition. Step Illustration Handling Instruction...
  • Page 97 U-Match Series Service Manual 2. Remove the water Remove the water tray tray 3. Loosen the bolts Use spanner to loosen the fixing the fan bolts fixing the fan. 4. Remove the fan Remove the fan 5. Loosen the screws Use screwdriver to loosen fixing the motor the screws fixing the motor...
  • Page 98 U-Match Series Service Manual Mount the fan and use 8. Mount the fan and spanner to tighten the bolts tighten the fixing bolts fixing the fan. 9. Mount the water Use screwdriver to loosen tray and tighten the the screws fixing the water screws tray Removal and Installation of Drainage Pump...
  • Page 99 U-Match Series Service Manual 4. Take out the pump Take out the pump and and replace it replace it 5. Connect the Connect the drainage pipe drainage pipe and and use screwdriver to tighten the screws tighten the screws fixing fixing the water pump.

  • Page 100: Exploded Views And Spare Part List

    U-Match Series Service Manual 5 EXPLODED VIEWS AND SPARE PART LIST 5.1 Outdoor Unit  Model: GUHN18NK3HO/GUHN24NK3HO Exploded Views and spare parts list:...
  • Page 101 U-Match Series Service Manual GUHN18NK3HO GUHN24NK3HO Name of Part Product Code CF021W2090 Product Code CF021W2100 Part Code Quantity Part Code Quantity Front Grill '22415010 '22415010 Front Panel '01535013P '01535013P Axial Flow Fan '10335008 '10335008 Chassis Sub-Assy '01195200081P '01195200082P Electrical '765152128...
  • Page 102 U-Match Series Service Manual  Model: GUHN30NK3HO Exploded Views and spare parts list:...
  • Page 103 U-Match Series Service Manual GUHN30NK3HO Name of Part Product Code CF021W2110 Part Code Quantity Front Grill '22415011 Cabinet '01435004P Left Handle '26235401 Axial Flow Fan '10335014 Front Side Plate '01305086P Chassis Sub-Assy '0119523602P Electrical Heater(Compressor) '765152128 Drainage Hole Cap '06813401 Drainage Connecter '06123401 Compressor and Fittings...
  • Page 104 U-Match Series Service Manual  Model: GUHN36NM3HO Exploded Views and spare parts list:...
  • Page 105 U-Match Series Service Manual GUHN36NM3HO Name of Part Product Code CF021W2080 Part Code Quantity Front Grill 22415011 Cabinet '01435004P Left Handle '26235401 Axial Flow Fan '10335014 Front Side Plate '01305086P Electrical Heater(Compressor) '765152128 Drainage hole Cap '06813401 Drainage Connecter '06123401 Chassis Sub-Assy ` 0119523601P Compressor Gasket...
  • Page 106 U-Match Series Service Manual  Model: GUHN42NM3HO Exploded Views and spare parts list:...
  • Page 107 U-Match Series Service Manual GUHN42NM3HO Name of Part Product Code CF021W2070 Part Code Quantity Front Grill '26905200121 Handle '26235253 Cabinet '01435007P Front Side Plate Sub-Assy '01315414 Axial Flow Fan '10335010 Motor Support Sub-Assy '01805470 Chassis Sub-Assy '01195200078P Drainage Joint '26113009 Gas-liquid Swparator Sub-Assy '0722501801 Compressor Gasket...
  • Page 108 U-Match Series Service Manual  Model: GUHN48NM3HO Exploded Views and spare parts list:...
  • Page 109 U-Match Series Service Manual GUHN48NM3HO Name of Part Product Code CF021W2060 Part Code Quantity Front Grill '26905200121 Cabinet '01435007P Handle '26235253 Front Side Plate Sub-Assy '01315414 Axial Flow Fan '10335010 Chassis Sub-Assy '01205139P Motor Support Sub-Assy '01285200072 Drainage Joint '26113009 Compressor Gasket '76710209 Compressor and Fittings...
  • Page 110 U-Match Series Service Manual  Model: GUHN60NM3HO Exploded Views and spare parts list:...
  • Page 111 U-Match Series Service Manual GUHN60NM3HO Name of Part Product Code CF021W2050 Part Code Quantity Front Grill '01575200002 Diversion Circle '10474100001 Cabinet Assy '01514100006 Handle '26235253 Front Side Plate '01314100021P Axial Flow Fan '1043410000301 Fan Motor '1501506714 Motor Support Sub-Assy '01804100024 Electrical Heater(Compressor) '7651540407 Drainage Hole Cap...

  • Page 112: Indoor Unit

    U-Match Series Service Manual 5.2 Indoor Unit 5.2.1 Duct Type  Model: GFH18K3H1I exploded view and spare parts list...
  • Page 113 U-Match Series Service Manual GFH18K3H1I Name of Part Product Code CF022N0840 Part Code Quantity Display Board '30294000007 Ambient Temperature '3900012123 Sensor Temperature Sensor '390001921 Right Side Plate Sub-Assy '01308670 Fan Motor Mounting Plate '01339058 Sub-Assy Front Volute Casing '22202030 Motor Support Sub-Assy '01709056 Centrifugal Fan '10319051...
  • Page 114 U-Match Series Service Manual  Model: GFH24K3H1I/GFH30K3H1I exploded view and spare parts list...
  • Page 115 U-Match Series Service Manual GFH24K3H1I GFH30K3H1I Name of Part Product Code CF022N0870 Product Code CF022N0860 Part Code Quantity Part Code Quantity Display Board '30294000007 '30294000007 Ambient Temperature '3900012123 '3900012123 Sensor Temperature Sensor '390001921 '390001921 Left Side Plate Assy '01314155 '01314155 Blower(Left) '15012454 '15012454...
  • Page 116 U-Match Series Service Manual  Model: GFH36K3H1I/GFH42K3H1I exploded view and spare parts list...
  • Page 117 U-Match Series Service Manual GFH36K3H1I GFH42K3H1I Name of Part Product Code CF022N0810 Product Code CF022N0800 Part Code Quantity Part Code Quantity Display Board '30294000007 '30294000007 Ambient Temperature '3900012123 '3900012123 Sensor Temperature Sensor '390001921G '390001921G Left Side Plate Assy '01315306 '01315306 Evaporator Assy ` 01025200171 ` 01025200171...
  • Page 118 U-Match Series Service Manual  Model: GFH48K3H1I exploded view and spare parts list...
  • Page 119 U-Match Series Service Manual GFH48K3H1I Name of Part Product Code CF022N0780 Part Code Quantity Display Board '30294000007 Ambient Temperature Sensor '3900012123 Temperature Sensor '390001921 Left Side Plate Assy '01315306 Blower(Left) '15018603 Evaporator Assy '01025200172 Water Level Switch '45020216 Pump Drainpipe '2690520014601 Water Pump '43138000058...
  • Page 120 U-Match Series Service Manual  Model: GFH60K3H1I exploded view and spare parts list...
  • Page 121 U-Match Series Service Manual GFH60K3H1I Name of Part Product Code CF022N0760 Part Code Quantity Display Board '30294000007 Ambient Temperature Sensor '3900012123 Temperature Sensor '390001921 Left Side Plate Assy '01309108 Blower(Left) '15019065 Evaporator Assy '01025200175 Choke Plug of Water Pipe '76712454 Filter Guide Groove '01729166 Filter Sub-Assy...
  • Page 122 U-Match Series Service Manual  Model: GFH18K3HI exploded view and spare parts list...
  • Page 123 U-Match Series Service Manual GFH18K3HI Name of Part Product Code CF022N0830 Part Code Quantity Display Board '30294000007 Ambient Temperature '3900012123 Sensor Temperature Sensor '390001921 Right Side Plate Sub-Assy '01308670 Fan Motor Mounting Plate '01339058 Sub-Assy Front Volute Casing '22202030 Motor Support Sub-Assy '01709056 Centrifugal Fan '10319051...
  • Page 124 U-Match Series Service Manual  Model: GFH24K3HI/GFH30K3HI exploded view and spare parts list...
  • Page 125 U-Match Series Service Manual GFH24K3HI GFH30K3HI Name of Part Product Code CF022N0880 Product Code CF022N0850 Part Code Quantity Part Code Quantity Display Board '30294000007 '30294000007 Ambient Temperature '3900012123 '3900012123 Sensor Temperature Sensor '390001921 '390001921 Left Side Plate Assy '01314155 '01314155 Evaporator Assy '01025200177 '01025200177...
  • Page 126 U-Match Series Service Manual  Model: GFH36K3HI/GFH42K3HI exploded view and spare parts list...
  • Page 127 U-Match Series Service Manual GFH36K3HI GFH42K3HI Name of Part Product Code CF022N0820 Product Code CF022N0790 Part Code Quantity Part Code Quantity Display Board '30294000007 '30294000007 Ambient Temperature '3900012123 '3900012123 Sensor Temperature Sensor '390001921G '390001921G Left Side Plate Assy '01315306 '01315306 Evaporator Assy ` 01025200171 ` 01025200171...
  • Page 128 U-Match Series Service Manual  Model: GFH48K3HI exploded view and spare parts list...
  • Page 129 U-Match Series Service Manual GFH48K3HI Name of Part Product Code CF022N0770 Part Code Quantity Top Cover Board Assy '01265200086 Display Board '30294000007 Ambient Temperature Sensor '3900012123 Temperature Sensor '390001921 Left Side Plate Assy '01315306 Blower(Left) '15018603 Evaporator Assy '01025200172 Air Intake Side Board '01375301 Filter Sub-Assy '111253031...
  • Page 130 U-Match Series Service Manual  Model: GFH60K3HI exploded view and spare parts list...
  • Page 131 U-Match Series Service Manual GFH60K3H1I Name of Part Product Code CF022N0750 Part Code Quantity Display Board '30294000007 Ambient Temperature Sensor '3900012123 Temperature Sensor '390001921 Left Side Plate Assy '01309108 Blower(Left) '15019065 Evaporator Assy '01025200175 Choke Plug of Water Pipe '76712454 Filter Guide Groove '01729166 Filter Sub-Assy...
  • Page 132 U-Match Series Service Manual 5.2.2 Cassette Type  Model: GKH18K3HI exploded view and spare parts list.
  • Page 133 U-Match Series Service Manual GKH18K3HI Name of Part Product Code ET010N1090 Part Code Quantity Rear Grill '26909400007 Diversion Circle '10479400001 Water Tray Assy '01289400004 Centrifugal Fan '10429400001 Supporter(Evaporator) '01809400007 Baffle Plate Sub-Assy 01359400002 Liquid Level Switch '450102013 Pump Drainpipe ` 26909400069 Left Side Plate Sub-Assy '01319400012 Press Plate (Outlet Pipe)
  • Page 134 U-Match Series Service Manual  Model: GKH24K3HI/GKH30K3HI exploded view and spare parts list.
  • Page 135 U-Match Series Service Manual GKH24K3HI GKH30K3HI Name of Part Product Code ET010N1110 Product Code ET010N1100 Part Code Quantity Part Code Quantity Diversion Circle '10372701 '10372701 Electric Box Assy '01399400146 '01399400146 Terminal Board '4201025301 '4201025301 Terminal Board '4201115404 '4201115404 Main Board '30224000086 '30224000086 Capacitor...
  • Page 136 U-Match Series Service Manual  Model: GKH36K3HI/GKH42K3HI/GKH48K3HI exploded view and spare parts list.
  • Page 137 U-Match Series Service Manual GKH36K3HI GKH42K3HI Name of Part Product Code ET010N1080 Product Code ET010N1070 Part Code Quantity Part Code Quantity Electric Box Assy '01399400146 '01399400146 Terminal Board '4201025301 '4201025301 Terminal Board '4201115404 '4201115404 Main Board '30224000086 '30224000086 Capacitor CBB61S '3301074706 '3301074706 Water Tray Assy...
  • Page 138 U-Match Series Service Manual GKH48K3HI Name of Part Product Code ET010N1060 Part Code Quantity Electric Box Assy '01399400146 Terminal Board '4201025301 Terminal Board '4201115404 Main Board '30224000086 Capacitor CBB61S '3301074706 Water Tray Assy '20182701 Evaporator Support Assy '01072707 Fan Fixer '10312701 Left Side Plate Assy '01302711...
  • Page 139 U-Match Series Service Manual  Model: GKH60K3HI exploded view and spare parts list.
  • Page 140 U-Match Series Service Manual GKH60K3HI Name of Part Product Code ET010N1050 Part Code Quantity Electric Box Assy '01399400154 Terminal Board '4201025301 Diversion Circle '10479400002 Fan Fixer '10312701 Centrifugal Fan '10429400003 Water Tray Assy '01289400014 Evaporator Support '01849406 Connection Sheet Assy '01249400012 Side Plate 1 '01319400025...
  • Page 141 JF00302749...

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