ACPro AC Pro C Series Installation Instructions Manual
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ACPro AC Pro C Series Installation Instructions Manual

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AC Pro C, D, & F Series
18-48k BTU
Installation Instructions
Models
AUHD18ND3FO
AUHD24ND3FO
AUHD30ND3FO
AUHD36ND3FO
AUHD42ND3FO
AUHD48ND3FO
(Refrigerant R410A)

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  • Page 1 AC Pro C, D, & F Series 18-48k BTU Installation Instructions Models AUHD18ND3FO AUHD24ND3FO AUHD30ND3FO AUHD36ND3FO AUHD42ND3FO AUHD48ND3FO (Refrigerant R410A)

  • Page 2: Table Of Contents

    Table of Contents Control 1. Wired Controller Installation of Wired Controller 5.1 Standard Accessories 5.2 Installation Position and Requirement 5.3 Installation of Wired Controller 5.4 Removal of Wired Controller 2. Troubleshooting 3. Centralized Controller 7.1 Smart Zone Controller 7.2 Additional Special Functions Installation 1.

  • Page 3: Installation Of Wired Controller

    5 INSTALLATION OF WIRED CONTROLLER 5 INSTALLATION OF WIRED CONTROLLER 5.1 Standard Accessories 5.1 Standard Accessories Table 2-5-1 Standard Accessories of Wired Controller Table 2-5-1 Standard Accessories of Wired Controller Description Quantity Note Description Quantity Note 1 in Figure 2-5-1 Socket base box installed in the wall No.1 in Figure 2-5-1 2 in Figure 2-5-1...

  • Page 4: Removal Of Wired Controller

    Firstly, the selection and connection way of wired controller’s signal wire are as below: 5.3 Installation of Wired Controller (1) Choose suitable signal wire: 2-core signal wire (wire diameter 0.75mm (AWG18), wire length<30m (98-2/5ft) and the recommended length is 8m (26-1/4ft). Firstly, the selection and connection way of wired controller’s signal wire are as below: 5.3 Installation of Wired Controller Firstly, the selection and connection way of wired controller’s signal wire are as below:...

  • Page 5: Troubleshooting

    6 TROUBLESHOOTING Display of Error Code Table 2-6-1 Error Code List Error Compressor high pressure protection Freeze protection Compressor low pressure protection, refrigerant lacking protection, refrigerant recycling mode Compressor high discharge temperature protection Communication malfunction Malfunction of indoor fan motor Full water protection Malfunction of indoor ambient temperature sensor Malfunction of evaporator temperature sensor...

  • Page 6: Centralized Controller

    Malfunction of outdoor drive memory chip When there is a malfunction during operation, error will be displayed on the temperature displaying When there is a malfunction during operation, error will be displayed on the temperature displaying zone of LCD. When sever- zone of LCD.
  • Page 7 7.1.3 Functions of Press Buttons Table 2-7-1 Functions of Press Buttons 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. 1.
  • Page 8 It displays the current time (hour and minute) in 24-hour time system System clock and also the week day. Table 2-7-2 Introduction to the Symbols on the LCD Shield It displays the shield status, “ALL’, “TEMP”, “MODE” and ‘ On/Off”. Function Description It displays the timing period (unit: 0.5 hour) which will circulate every Weekly timer...

  • Page 9: Additional Special Functions

    U-Match Series DC Inverter Service Manual 7.1.4.4 Dimensions 7.1.4.4 Dimensions Figure 2-7-5 7.2 Additional Special Functions 7.2.1 Door control function Figure 2-7-5 Door control function is available for this series. In order to achieve this function, please select the 7.2 Additional Special Functions door control accessories from Gree.
  • Page 10 CN1 wiring terminal and door control interface of indoor main board Terminal name X1(AC-L, AC-N) wiring terminal, connected to door control input X1(AC-L, AC-N) CN1 wiring terminal signal, rated voltage 220V. Table 2-7-3 Door control wiring port X1(AC-L, AC-N) w X2 wiring terminal, connected to door control input signal X1(AC-L, AC-N) Function Description...
  • Page 11 U-Match Series DC Inverter Service Manual Note: You can purchase the accessory from Gree. The information is as below: Name. Product code Remark Table 2-7-3 Door control wiring port Controller for door control function MC207022 One controller for one unit Terminal name Terminal instruction (MK03)
  • Page 12 Note: When door control function and human sensitive function have been set at the same time, it is defaulted that door control function is valid and human sensitive function is invalid. The user can purchase the human sensitive module by himself. Please pay attention to the following notes: 1.
  • Page 13 U-Match Series DC Inverter Service Manual Figure 2-7-10 Address setting of each unit: when the address mode is set to be long-distance control address 2. Address setting of each unit: when the address mode is set to be long-distance control address mode. The address mode.
  • Page 14 U-Match Series DC Inverter Service Manual Notes: Figure 2-7-11 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; Notes: 1.
  • Page 15 Choose the first selection and then press Enter/Cancel button to save and exit setting. Now, the address of wired controller is set to match the address of centralized controller. The unit will memorize this Choose the first selection and then press Enter/Cancel button to save and exit setting. Now, the address of wired controller is set to match the address of centralized controller.
  • Page 16 address sequence and then press Enter/Cancel button to confirm. The setting value will be memorized after power failure. The detailed setting is as shown in the Figure below: When the address is set, the wired controller can be removed and connect the centralized controller to the indoor main board. Figure 2-7-13 Then connect the required units to realize centralized control of these units;...
  • Page 17 There are two buttons on the light board to control ON/OFF of cooling and heating. There are also other indicators and nixie tube display. There are two buttons on the light board to control ON/OFF of cooling and heating. There are also other indicators and nixie Cooling: set temperature 26°(79 ), low fan speed;...
  • Page 18 U-Match Series DC Inverter Service Manual Figure 2-7-15 Malfunction output (3) Setting method: 3. Setting method: Do not need to set this function Do not need to set this function Notes: Notes: 1. The interface voltage should be 220V AC intense current; 2.
  • Page 19 U-Match Series DC Inverter Service Manual Figure 2-7-16 Figure 2-7-16 Table 2-7-4 Corresponding interfaces of main board Table 2-7-4 Corresponding interfaces of main board Interface Interface Evaporator temperature sensor Evaporator temperature sensor Swing motor Swing motor Human sensitive Human sensitive Door control Door control Full water detection...
  • Page 20 7.2.7 Reserved fresh air valve interface for duct type unit 7.2.7 Reserved fresh air valve interface for duct type unit For the reserved connection way of air valve performer, connect it to F, C, O of wiring board according 7.2.7 Reserved fresh air valve interface for duct type unit For the reserved connection way of air valve performer, connect it to F, C, O of wiring board according to the wiring diagram.
  • Page 21 U-Match Series DC Inverter Service Manual 7.2.9 Chassis electric heating belt of outdoor unit is optional 7.2.9 Chassis electric heating belt of outdoor unit is optional When outdoor ambient temperature is very low, electric heating belt can be equipped on the chassis to prevent freezing of the chassis.

  • Page 22: Installation

    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 23 Air-conditioning Unit expansion bolt. Ceiling-mount Screw Hanger Air-conditioning Unit Ceiling-mount Screw Hanger Figure 3-1-1 Figure 3-1-2 Screw Hook Figure 3-1-1 Figure 3-1-2 Screw Hook Figure 3-1-3 Figure 3-1-3 Install the hanger onto the indoor unit as Figure 3-1-2 and Figure 3-1-3 shows. Install the hanger onto the indoor unit as Figure 3-1-2 and Figure 3-1-3 shows.
  • Page 24 Figure 3-1-5 1.1.4 Dimension Data 1.1.4 Dimension Data  For the units: 18k  For the units: 24k~42k U-Match Series DC Inverter Service Manual  For the units: 48k Figure 3-1-6 Technical Information Table 3-1-1 Unit: mm (inch) Item...
  • Page 25 Table 3-1-1 Unit: mm (inch) Item Model 1037 AFH18D3FI (37-1/4) (24-3/8) (29) (35-1/8) (40-7/8) (28-3/8) (29) (4-7/8) (10-1/2) AFH24D3FI 1101 1159 1279 1002 (43-3/8) (20-3/8) (32-1/4) (45-5/8) (50-3/8) (22) (39-1/2) (6-1/4) (9-1/4) (10-1/2) AFH30D3FI AFH36D3FI 1011 1115 1226 (39-3/4) (29-1/2) (32-1/4) (43-7/8) (48-1/4)
  • Page 26 Install the drain hose in accordance with the instructions in this installation manual and keep the a rea warm enough to prevent condensation. Problems with the piping may lead to water leaks. 1.1.6 Drain Piping Work (1) (Install the drain hose with downward gradient (1/50 to 1/100) and no risers or traps are used for CAUTION! Installation of Drainage Pipeline: the hose (Figure 3-1-8).
  • Page 27 (6) There is a drain port on both the left and right sides. Select the drain port to match the local conditions (Figure 3-1-10). 5. Use a suitable drain hose, and see Table 3-3-3 for its size. (7) When the unit is shipped from the factory, the drain port is defaulted to be the one on the left side 6.
  • Page 28 Figure 3-1-15 The vertical height of the drain hose should be 75mm (3inch) or less so that it is unnecessary for the drain port to withstand additional force. 1. The vertical height of the drain hose should be 75mm (3inch) or less so that it is unnecessary for the drain port to withstand additional force.
  • Page 29 Table 3-1-3 Unit: mm (inch) Supply Air Outlet Return Air Inlet Item Model AFH18D3FI 123(4-7/8) 736(29) 710(28) 166(6-1/2) AFH24D3FI 158(6-1/4) 818(32-1/4) 994(39-1/8) 195(7-5/8) U-Match Series DC Inverter Service Manual AFH30D3FI 158(6-1/4) 818(32-1/4) 994(39-1/8) 195(7-5/8) U-Match Series DC Inverter Service Manual AFH36D3FI 158(6-1/4) 818(32-1/4)
  • Page 30 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. For the sake of the convenience to freely adjust the height, a cutting of canvas duct will be helpful, which can be reinforced and folded by 8# iron wire.
  • Page 31  Floor type U-Match Series DC Inverter Service Manual  Floor type  Ceiling type  Ceiling type Figure 3-1-23 (4) Install the unit where the drain pipe can be easily installed. (5) The space from the unit to the ceiling should be kept as much as possible so as for more Figure 3-1-23 convenient service.
  • Page 32 U-Match Series DC Inverter Service Manual U-Match Series DC Inverter Service Manual (3) Firstly unfix two buckles on the grille as shown on the picture. Remove the screws under the (3) Firstly unfix two buckles on the grille as shown on the picture. Remove the screws under the 3.
  • Page 33 U-Match Series DC Inverter Service Manual U-Match Series DC Inverter Service Manual  Ceiling type  Ceiling type Ceiling Ceiling Suspension bolt Suspension bolt Spring washer Spring washer Left side panel Right side panel Left side panel Right side panel Hanger Hanger Figure 3-1-28...
  • Page 34 1.2.5 Dimension Data 1.2.5 Dimension Data Figure 3-1-30 Table 3-1-6 Unit: mm (inch) Figure 3-1-30 Model Table 3-1-6 GTH18D3FI Table 3-1-6 1220(48) 225(8-7/8) 1158(45-5/8) 280(11) 700(27-1/2) GTH24D3FI Unit: mm (inch) Model GTH30D3FI Model ATH18D3FI 1220(48) 225(8-7/8) 1158(45-5/8) 280(11) 700(27-1/2) ATH24D3FI GTH36D3FI 1420(55-7/8) 245(9-5/8)
  • Page 35 U-Match Series DC Inverter Service Manual (4) Connect the drain hose (Figure 3-1-32). Drain hose must 4. Connect the drain hose (Figure 3-1-32). (4) Connect the drain hose (Figure 3-1-32). slope downward. Drain hose must slope downward. Allow no trap to form in the piping Allow no trap to form in the piping...
  • Page 36 U-Match Series DC Inverter Service Manual Drain pan Drain pan Drain hose Bottom-right piping Right side piping Drain hose Figure 3-1-36 Bottom-right piping Right side piping 1.2.6.4 Testing of Drain Piping Figure 3-1-36 1.2.6.4 Testing of Drain Piping 1.2.6.4 Testing of Drain Piping (1) After piping work is finished, check if drainage flows smoothly.
  • Page 37 approval. (1) Obstruct should be put away from the intake or outlet vent of the indoor unit so that the airflow can be blown through all the room. 1.3.2 Installation Site Select an installation site where the following conditions are fulfilled and that meets your customer's approval. (2) Make sure that the installation meets the requirement of the schematic diagram of installation spaces.
  • Page 38 U-Match Series DC Inverter Service Manual Insert Gasket anchor board(attachment) Hoisting stand 1.3.3 Installing the Main Body Unit Tighten(double nuts) 1.3.3 Installing the Main Body Unit [Fix the gasket firmly] [Fix the hoisting stand firmly] Nut(field supplied) One bolt located at one corner of the outlet pipe Gas(attachment) Center of the ceiling should be fixed on one corner of the drainage slot.
  • Page 39 1.3.5 Leveling The water level test must be done after installing the indoor unit to make the unit is horizontal, as shown below. The water level test must be done after installing the indoor unit to make the unit is horizontal, as 1.3.5 Leveling The water level test must be done after installing the indoor unit to make the unit is horizontal, as shown below.
  • Page 40 U-Match Series DC Inverter Service Manual Hook Latch U-Match Series DC Inverter Service Manual Piping position Hook Latch Hook Latch Piping position Piping position Swing flap motor Swing flap motor Swing flap motor ④ Indoor unit Ceiling Indoor unit ④ ④...
  • Page 41 U-Match Series DC Inverter Service Manual U-Match Series DC Inverter Service Manual 9. Wire the swing flap motor as shown in Figure 3-1-48. (9) Wire the swing flap motor as shown in Figure 3-1-48. (9) Wire the swing flap motor as shown in Figure 3-1-48. Connect them to the Connect them to the main body according...
  • Page 42 U-Match Series DC Inverter Service Manual Unit: mm (inch) Item Model Unit: mm (inch) Unit: mm (inch) Item Item/Model GKH24D3FI (37-3/8) (33-1/8) (30-3/4) (26-3/4) (6-1/4) (9-1/2) (36-1/8) (8-1/2) (39-1/8) Model AKH24D3FI (37-3/8) (33-1/8) (30-3/4) (26-3/4) (6-1/4) (9-1/2) (36-1/8) (8-1/2) (39-1/8) GKH30D3FI GKH24D3FI (37-3/8)
  • Page 43 (2) Connect the extension drain pipe to the drain pipe and then tighten the clamp with tape. 1.3.9 Installing the Drain Pipes 1.3.9 Installing the Drain Pipes 1.3.9 Installing the Drain Pipes 1.3.9 Installing the Drain Pipes (1) Insert the drain pipe to the drain outlet of the unit and then tighten the clamp securely with tape. (1) Insert the drain pipe to the drain outlet of the unit and then tighten the clamp securely with tape.
  • Page 44 (8) Connection of drainage branch pipe to the standpipe or horizontal pipe of drainage main pipe. (8) Connection of drainage branch pipe to the standpipe or horizontal pipe of drainage main pipe. (9) The horizontal pipe cannot be connected to the vertical pipe at a same height. It can be connected 8.
  • Page 45 U-Match Series DC Inverter Service Manual U-Match Series DC Inverter Service Manual U-Match Series DC Inverter Service Manual 1~1.5m(3-2/7~5feet) 1~1.5m(3-2/7~5feet) 1~1.5m(3-2/7~5feet) × (wrong ) × (wrong ) × (wrong ) Figure 3-1-59 Figure 3-1-59 Figure 3-1-59 (5) The incline of attached drain hose should be 75mm (3inch) or less so that the drain outlet does 5.

  • Page 46: Caution For Installation

    2 OUTDOOR UNIT INSTALLATION 2.1 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. Ensure that the model is correct and the machine is in good condition.

  • Page 47: Dimension Data

    To install the drainage pipe, please insert the drainage joint to the drainage hole on the outd ssis and connect a drainage pipe on the drainage joint. (The installing height of outdoor unit shall b To meet the noise and vibration requirements, the outdoor unit shall be installed by using rubber damping pad or spring t 5cm (2inch) if drainage joint is to be used).

  • Page 48: Refrigeration Piping Work

    (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. 3.1.1 Flare Processing 3 REFRIGERATION PIPING WORK (3) Remove the flare nuts at the stop valve of the outdoor unit and inside the accessory bag of the (1) Cut the connection pipe with the pipe cutter and remove the burrs.
  • Page 49 3.1.3 Connecting the Pipe at the Indoor Unit Side Detach the caps and plugs from the pipes. CAUTION! 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 50 Be sure to connect the gas pipe after connecting the liquid pipe completely. 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 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.
  • Page 51 U-Match Series DC Inverter Service Manual 6. Wait for some time to see if the system pressure can remain unchanged, 3 minutes for the 18k/24k units, 10 minutes for (7) Slightly open the liquid valve and let some refrigerant go to the connection pipe to balance the the 30k/36k/42k/48k units.

  • Page 52: Specification Of Connection Pipe

    an oil bend should be employed for every 6m (19-2/3 feet). Outdoor Oil bend Indoor Oil bend Figure 3-3-8 3.2 Specification of Connection Pipe 3.2 Specification of Connection Pipe Table 3-3-3 Table 3-3-3 Size of Fitting Pipe Max. Pipe Max. Height Difference Drainage pipe(Outer mm (inch) Size of Fitting Pipe...

  • Page 53: Electrical Wiring

    inch). Using a screwdriver, remove the terminal screw(s) on the terminal board. 4.2 Electrical Wiring Using pliers, bend the solid wire to form a loop suitable for the terminal screw. 1. For solid core wiring (Figure 3-4-1) Shape the loop wire properly, place it on the terminal board and tighten securely with the a.
  • Page 54 leakage may occur.) ⑥. Always connect the ground wire. 4. Electric wiring between the indoor and outdoor units (4) Electric wiring between the indoor and outdoor units  Duct Type Unit: Duct Type Unit: Single-phase units (18k~30k) Single-phase units (18k~30k) Single-phase units (36k~48k) Single-phase units (36k~48k) Technical Information...
  • Page 55 U-Match Series DC Inverter Service Manual Cassette Type Unit:  Cassette Type Unit: Single-phase units: 18k Single-phase units: 18k Single-phase units: 24k~30k Single-phase units: 24k~30k Single-phase units: 36k~42k Single-phase units: 36k~42k Technical Information...
  • Page 56 U-Match Series DC Inverter Service Manual 5. Electric wiring of indoor unit side (5) Electric wiring of indoor unit side Remove the electric box cover from the electric box sub-assy and then connect the wire. Remove the electric box cover from the electric box sub-assy and then connect the wire. Duct Type Unit: ...
  • Page 57 U-Match Series DC Inverter Service Manual For the units: 48k H1 H2 Figure 3-4-6  Floor Ceiling Type Unit: Electric box cover H1 H2 Figure 3-4-7 CAUTION! 1. The power cord and the wire of the fresh air valve are high-voltage, while the communication cord and connection wire of .
  • Page 58 U-Match Series DC Inverter Service Manual ④. The high-voltage and low-voltage lines should be fixed separately and securely, with internal big clamps for the 4. The high-voltage and low-voltage lines should be fixed separately and securely, with internal big clamps for the former and former and small clamps for the latter.

  • Page 59: Maintenance

    MAINTENANCE 1 TROUBLE TABLE 1.1 Main Control Malfunction Table 4-1-1 Fault Display on Indoor Wired Controller Malfunction Origin of Error code Control description name malfunction signal When outdoor unit detects the high pressure switch is cut off for 3s successively, high pressure protection will occur.
  • Page 60 Malfunction Origin of Error code Control description name malfunction signal If cut-off of water level switch is detected for 8s suc- Full water cessively once energized, the system will enter full water Water level switch protection protection. In this case, switch off the unit and then switch it on to eliminate this malfunction.
  • Page 61 Malfunction Origin of Error code Control description name malfunction signal If outdoor unit detects that the tube temperature is higher than protective temp. value, the unit will report overload Evaporator protection. The unit will not restart operation until tube Overload temperature, temperature is lower than the protective temp.

  • Page 62: Description Of Drive Malfunction

    1.2 Description of Drive Malfunction Main board dual 8 numeral tube Display Codes for Outdoor Unit of 18k~48k Outdoor unit display of Malfunction Item Indoor Unit Display dual 8 numeral tube DC busbar over-voltage protection IPM or PFC over-temperature protection Current sense circuit error IPM or PFC temperature sensor error Compressor current protection...

  • Page 63: Flow Chart Of Troubleshooting

    2 FLOW CHART OF TROUBLESHOOTING 2.1 Troubleshooting Flow Chart of Main Control Malfunction E1 High Pressure Protection E1 protection Reconnect wire according to the circuit diagram Check if the high Check if the system high Check if the wiring of Replace the high pressure switch pressure is higher than...
  • Page 64 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. The user is required to clean the filter, check the air outlet and air return pipe periodically to ensure smooth air return and air outlet.
  • Page 65 E4 Discharge Protection E4 protection Replace the discharge temperature sensor Check if the discharge temperature Check if the discharge around compressor discharge temperature sensor is temperature sensor exceeds normal 115ºC (239ºF) Replace the outdoor main control board Check if thre is a leakage in the system pipeline;...
  • Page 66 9 Full Water Protection E9 protection Short circuit the full water If the unit is installed protection interface on indoor with water pump mainboard according to the circuit diagram Check if the water pump Replace the water pump works normally Replace the full water switch or make sure the float of full water switch...
  • Page 67 F1 Malfunction of Evaporator Temperature Sensor Malfunction of evaporator temperature sensor Check if the evaporator temperature sensor on mainboard Correctly insert the temperature is inserted on the needle stand sensor on the needle stand correctly Disconnect the temperature sensor and measure if its Replace the temperature sensor resistance is normal Replace the indoor mainboard...
  • Page 68 F3 Malfunction of Outdoor Ambient Temperature Sensor Malfunction of outdoor ambient temperature sensor Check if the outdoor ambient Correctly insert the temperature sensor on mainboard temperature sensor on is inserted on the needle stand the needle stand correctly Disconnect the temperature sensor Replace the and measure if its resistance is temperature sensor...
  • Page 69 F5 Malfunction of Wired Controller Temperature Sensor Malfunction of wired controller temperature sensor Replace the wired controller H6 Malfunction of Outdoor Fan Motor Malfunction of outdoor fan motor Check if the control wire of Correctly connect the outdoor fan motor is connected on control wire of fan the outdoor mainboard correctly motor on the mainboard...

  • Page 70: Troubleshooting Flow Chart Of Drive Malfunction

    E8 Malfunction of Indoor Fan Motor Malfunction of indoor fan motor Check if the Correctly connect the control wire of indoor fan motor control wire of fan is connected on the outdoor motor on the mainboard mainboard correctly Replace the indoor fan motor and Operate the unit with then restart the unit to see if there the new motor...
  • Page 71 P8 IPM or PFC over-temperature protection P8 is displayed on the wired controller P8 is displayed in the mainboard 88 Indicating lamp Replace the Tighten the IPM or Is the IPM or PFC module of PFC module mainboard tightened? mainboard Work normally PH DC busbar over-voltage protection PL DC busbar under-voltage protection...
  • Page 72 P6 Drive-to-main-control communication error Lc Compressor Startup Failure Lc is displayed on the wired controller Lc is displayed in the mainboard 88 indicating lamp Replace the mainboard. Does it work normally? Replace the compressor Work normally P5 Compressor current protection H7 Compressor motor desynchronizing H5 IPM protection Ld Phase loss...
  • Page 73 PU Charging circuit error PU is displayed on the wired controller PU is displayed in the mainboard 88 indicating lamp Replace the Tighten the PFC wire or Is the PFC wire tightened or is the mainboard adjust the sequence sequence right? Work normally ee driving board chip error ee is displayed on the...
  • Page 74 H6 DC fan error H6 is displayed on the wired controller H6 is displayed in the mainboard 88 indicating lamp Is the motor phase Adjust the compressor phase sequence sequence right? Tighten the fan wiring Is the Fan wire terminal loose? terminal Replace the mainboard.

  • Page 75: Interface

    2.3 Interface 2.3 Interface  GUHD18ND3FO/GUHD24ND3FO/ GUHD30ND3FO/ GUHD36ND3FO / GUHD42ND3FO AUHD18ND3FO/AUHD24ND3FO/ AUHD30ND3FO/ AUHD36ND3FO / AUHD42ND3FO /AUHD48ND3FO Main Control Board /GUHD48ND3FO Main Control Board NO. SILK-SCREEN INTERFACE INTERFACE INSTRUCTION SILK-SCREEN INTERFACE INTERFACE INSTRUCTION AC-L Live wire input Live wire input AC-L Live wire input Live wire input AC-N...
  • Page 76 SILK-SCREEN INTERFACE INTERFACE INSTRUCTION COMM1 Communication line [1-3.3V, Communication needle stand of main control drive 2-TX, 3-RX, 4-GND] 1-pin: +3.3V 2-pin: TXD 3-pin: RXD 4-pin: GND Communication line with1-pin Communication needle stand with indoor unit 1-pin: GND, 2-pin B and 3-pinA) 2-pin: B 3-pin: A Communication line with 1-pin...
  • Page 77 U-Match Series DC Inverter Service Manual AUHD18ND3FO/AUHD24ND3FO/AUHD30ND3FO/AUHD36ND3FO/AUHD42ND3FO  GUHD18ND3FO/GUHD24ND3FO/GUHD30ND3FO/GUHD36ND3FO/GUHD42ND3FO 1. Driving Board (1) Driving Board Printing Interface Printing Interface PRINTING INTERFACE PRINTING INTERFACE L2_2 PFC induction wire (blue) L1_1 PFC induction wire (brown) L2_2 PFC induction wire (blue) L1_1 PFC induction wire (brown) Neutral wire input (white) AC-L Live wire input (red)
  • Page 78 U-Match Series DC Inverter Service Manual 2. Filtering Board Filtering Board PRINTING INTERFACE PRINTING INTERFACE Printing Interface Printing Interface Neutral wire output 1 (white) (only for Neutral wire output N-OUT1 Neutral wire output 1 (white) N-OUT Neutral wire output (white) N-OUT1 N-OUT 18k)
  • Page 79 U-Match Series DC Inverter Service Manual  GUHD48ND3FO AUHD48ND3FO 1. Drive Board: (1) Drive Board: Printing Interface Printing Interface PRINTING INTERFACE PRINTING INTERFACE AC-L Live wire input (red) L1-1 PFC induction wire (brown) AC-L Live wire input (red) L1-1 PFC induction wire (brown) Neutral wire input (white) L2-2 PFC induction wire (blue)
  • Page 80 U-Match Series DC Inverter Service Manual 2. Filtering Board (2) Filtering Board: Printing Interface Printing Interface PRINTING INTERFACE PRINTING INTERFACE N-OUT Neutral wire output (white) L-OUT Live wire output (red) N-OUT Neutral wire output (white) L-OUT Live wire output (red) DC-BUS DC bus interface (connect to AC-L...

  • Page 81: Ipm, Pfc Testing Method

    (1) Preparation before test: prepare a universal meter and turn to its diode option, and then remove the wires U, V, W of the compressor after it is powered off for one minute. 2.4 IPM, PFC Testing Method (2) Testing Steps 2.4.1 Method of Testing IPM Module Step 1: put the black probe on the place P and the red one on the wiring terminal U, V, W respectively 1.

  • Page 82: Wiring Diagram

     GUHD48ND3FO U-Match Series DC Inverter Service Manual  GUHD48ND3FO AUHD48ND3FO 3 WIRING DIADRAM 3 WIRING DIADRAM 3 WIRING DIADRAM 3.1 Outdoor unit 3.1 Outdoor unit The actual wiring should always refer to the wiring diagram of the unit. The actual wiring should always refer to the wiring diagram of the unit. Model: AUHD18ND3FO 3.1 Outdoor unit ...
  • Page 83 U-Match Series DC Inverter Service Manual Model: AUHD24ND3FO  Model: GUHD24ND3FO Model: AUHD30ND3FO  Model: GUHD30ND3FO Technical Information...
  • Page 84 U-Match Series DC Inverter Service Manual  Model: GUHD36ND3FO Model: AUHD36ND3FO  Model: GUHD36ND3FO  Model: GUHD42ND3FO Model: AUHD42ND3FO  Model: GUHD42ND3FO Technical Information...

  • Page 85: Indoor Unit

     Model: GUHD48ND3FO U-Match Series DC Inverter Service Manual Model: AUHD48ND3FO  Model: GUHD48ND3FO 3.2 Indoor unit The actual wiring should always refer to the wiring diagram of the unit. 3.2 Indoor unit 3.2 Indoor unit The actual wiring should always refer to the wiring diagram of the unit. 3.2.1 Duct Type The actual wiring should always refer to the wiring diagram of the unit.
  • Page 86 U-Match Series DC Inverter Service Manual  Model: GFH48D3FI  Model: GFH48D3FI Model: AFH48D3FI 3.2.2 Floor Ceiling Type 3.2.2 Floor Ceiling Type 3.2.2 Floor Ceiling Type Model: ATH18D3FI/ATH24D3FI/ATH30D3FI/ATH36D3FI/ATH42D3FI/ATH48D3FI  Model: GTH18D3FI/GTH24D3FI/GTH30D3FI/GTH36D3FI/GTH42D3FI/GTH48D3FI  Model: GTH18D3FI/GTH24D3FI/GTH30D3FI/GTH36D3FI/GTH42D3FI/GTH48D3FI Technical Information...
  • Page 87 U-Match Series DC Inverter Service Manual 3.2.3 Cassette Type 3.2.3 Cassette Type 3.2.3 Cassette Type Model: AKH18D3FI  Model: GKH18D3FI  Model: GKH18D3FI  Model: GKH24D3FI/GKH30D3FI/GKH36D3FI/GKH42D3FI Model: AKH24D3FI/AKH30D3FI/AKH36D3FI/AKH42D3FI  Model: GKH24D3FI/GKH30D3FI/GKH36D3FI/GKH42D3FI Technical Information...
  • Page 88 U-Match Series DC Inverter Service Manual Model: AKH48D3FI  Model: GKH48D3FI Technical Information...
  • Page 89 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 of filter screen for return air disassembly. Do not put filter screen near the high temperature heat source. Remark: Make sure that the power supply is cut off before disassembling and protect all the parts during disassembly.
  • Page 90 Technical Information...

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