AC Pro C Series Installation Manual
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AC Pro C Series Installation Manual

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

  • Page 2: Installation Site

    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 3 Air-conditioning Unit Ceiling-mount Screw Hanger Figure 3-1-1 Figure 3-1-2 Screw Hook 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 3-1-4 shows. Screw Figure 3-1-4 Hanger Air Supply Air Intake...
  • Page 4 1.1.4 Dimension Data For the units: 18k For the units: 24k~42k For the units: 48k Figure 3-1-6 Technical Information...

  • Page 5: Installation Clearance Data

    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 6: Drain Piping Work

    1.1.6 Drain Piping Work CAUTION! Installation of Drainage Pipeline: 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.
  • Page 7 5. Use a suitable drain hose, and see Table 3-3-3 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 3-1-10). 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), the port on right side has been plugged.

  • Page 8: Installation Of Air Duct

    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. Drain hose(attachment) Figure 3-1-16 2. When multiple drain hoses are used, their installation should be performed as shown in the figure below. T-joint converging drain pipes T-joint converging drain pipes Figure 3-1-17...
  • Page 9 Table 3-1-3 Unit: mm (inch) Supply Air Outlet Return Air Inlet Item Model GFH18D3FI 123(4-7/8) 736(29) 710(28) 166(6-1/2) GFH24D3FI 158(6-1/4) 818(32-1/4) 994(39-1/8) 195(7-5/8) GFH30D3FI 158(6-1/4) 818(32-1/4) 994(39-1/8) 195(7-5/8) GFH36D3FI 158(6-1/4) 818(32-1/4) 1000(39-3/8) 206(8-1/8) GFH42D3FI 158(6-1/4) 818(32-1/4) 1000(39-3/8) 206(8-1/8) GFH48D3FI 190(7-1/2) 850(33-1/2) 940(37) 286(11-1/4)
  • Page 10 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 11: Indoor Unit Installation

    Floor 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 convenient service. 1.2.3 Indoor Unit Installation 1.
  • Page 12 3. Firstly unfix two buckles on the grille as shown on the picture. Remove the screws under the buckles by a screwdriver and then open the inlet grille. Remove the screw Figure 3-1-25 4. Remove the screws shown on the picture. Push the side plate as per the arrowed direction and take it down. Remove the screw Figure 3-1-26 5.
  • Page 13 Ceiling type Ceiling Suspension bolt Spring washer Left side panel Right side panel Hanger Figure 3-1-28 7. Adjust the height of the unit to make the drain pipe slant slightly downward so that the drainage will become much smoother. 1.2.4 Leveling The water level test must be done after installing the indoor unit to make the unit is horizontal, as shown below.
  • Page 14 1.2.5 Dimension Data Figure 3-1-30 Table 3-1-6 Model ATH18D3FI 1220(48) 225(8-7/8) 1158(45-5/8) 280(11) 700(27-1/2) ATH24D3FI ATH30D3FI 1420(55-7/8) 245(9-5/8) 1354(53-1/4) 280(11) 700(27-1/2) ATH36D3FI ATH42D3FI 1700(66-7/8) 245(9-5/8) 1634(64-3/8) 280(11) 700(27-1/2) ATH48D3FI 1.2.6 Drain Piping Work 1.2.6.1 Precautions When Doing the Piping Work 1.

  • Page 15: Installing The Drain Pipes

    4. Connect the drain hose (Figure 3-1-32). Drain hose must slope downward. Allow no trap to form in the piping Do not allow end of hose to touch water Figure 3-1-32 1.2.6.2 Installing the Drain Pipes 1. For determining the position of the drain hose, perform the following procedures. 2.

  • Page 16: Testing Of Drain Piping

    Drain pan Drain hose Bottom-right piping Right side piping Figure 3-1-36 1.2.6.4 Testing of Drain Piping 1. After piping work is finished, check if drainage flows smoothly. 2. As shown in the figure, pour water into the drain pan from the right side to check that water flows smoothly from the drain hose.
  • Page 17 1.3.2 Installation Site Select an installation site where the following conditions are fulfilled and that meets your customer's 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.

  • Page 18: Installing The Suspension Bolts

    1.3.3 Installing the Main Body Unit Nut(field supplied) Gas(attachment) Insert Gasket anchor board(attachment) Hoisting stand Tighten(double nuts) [Fix the gasket firmly] [Fix the hoisting stand firmly] One bolt located at one corner of the outlet pipe Center of the ceiling should be fixed on one corner of the drainage slot.

  • Page 19: The Panel Installation

    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. Figure 3-1-43 1.3.6 The Panel Installation 1. See the figure below for the relationship of the front panel and the connecting pipe. 2.
  • Page 20 Hook Latch Piping position Swing flap motor Indoor unit Ceiling Indoor unit 5~8mm(1/4~3/8inch) Panel Air outlet Figure 3-1-45 7. Improper screwing of the screws may cause the troubles shown in Figure 3-1-46. Air leak Condensate 8. If gap still exists between ceiling and decoration panel after tightening the screws, readjust the height of the indoor unit (Figure 3-1-47).

  • Page 21: Dimension Data

    9. Wire the swing flap motor as shown in Figure 3-1-48. Connect them to the main body according to the size of terminals Figure 3-1-48 1.3.7 Dimension Data 1.3.7 Dimension Data For the units: 18k Table 3-1-8 Unit: mm (inch) Model AKH18D3FI (26-3/8)
  • Page 22 Unit: mm (inch) Item/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) AKH30D3FI (37-3/8) (33-1/8) (30-3/4) (26-3/4) (6-1/4) (12-5/8) (36-1/8) (8-1/2) (39-1/8) AKH36D3FI (37-3/8) (33-1/8) (30-3/4) (26-3/4) (6-1/4) (12-5/8) (36-1/8) (8-1/2) (39-1/8) AKH42D3FI (37-3/8) (33-1/8) (30-3/4) (26-3/4) (6-1/4) (12-5/8) (36-1/8) (8-1/2)
  • Page 23 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. 2. Connect the extension drain pipe to the drain pipe and then tighten the clamp with tape. Tighten the clamp until the screw head is less then Insulate the pipe clamp and the drain hose using heat 4mm (1/8inch) from the hose.

  • Page 24: Precautions When Doing Riser Piping Work

    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 in a manner as shown below: NO.1: Attach the 3-way connection of the drainage pipe joint as shown in Figure 3-1-55.
  • Page 25 1~1.5m(3-2/7~5feet) × (wrong ) Figure 3-1-59 5. The incline of attached drain hose should be 75mm (3inch) or less so that the drain outlet does not have to withstand additional force. Drain hose(attachment) Figure 3-1-60 1.3.11 Testing of Drain Piping After piping work is finished, check if drainage flows smoothly.

  • Page 26: Before 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 27 To meet the noise and vibration requirements, the outdoor unit shall be installed by using rubber damping pad or spring damper. To install the drainage pipe, please insert the drainage joint to the drainage hole on the outdoor chassis and connect a drainage pipe on the drainage joint.

  • Page 28: Bending Pipes

    FRIGERATION 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.
  • Page 29 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 30: Vacuum And Gas Leakage Inspection

    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 31: Additional Charge

    6. Wait for some time to see if the system pressure can remain unchanged, 3 minutes for the 18k/24k units, 10 minutes for the 30k/36k/42k/48k units. During this time, the reading of the pressure gauge at the low pressure side can not be larger than 0.005MPa (0.72psig).

  • Page 32: Specification Of Connection Pipe

    Outdoor Oil bend Indoor Oil bend Figure 3-3-8 3.2 Specification of Connection Pipe Table 3-3-3 Size of Fitting Pipe Max. Pipe Max. Height Difference Drainage pipe(Outer mm (inch) Model/Item Length between Indoor Unit and Diameter × wall thickness) m (feet) Outdoor Unit mm (inch) Liquid...

  • Page 33: Electrical Wiring

    4.2 Electrical Wiring 1. For solid core wiring (Figure 3-4-1) a. Cut the wire end with a wire cutter or wire-cutting pliers, then strip the insulation about 25mm (1 inch). b. Using a screwdriver, remove the terminal screw(s) on the terminal board. c.
  • Page 34 4. Electric wiring between the indoor and outdoor units Duct Type Unit: Single-phase units (18k~30k) Single-phase units (36k~48k) Single-phase units (36k~48k) Technical Information...
  • Page 35 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 36 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: Duct Type Unit: L1 L2...
  • Page 37 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 the wired controller are low-voltage.
  • Page 38 4. The high-voltage and low-voltage lines should be fixed separately and securely, with internal big clamps for the former and small clamps for the latter. 5. Tighten the indoor/outdoor connection cord and power cord respectively on the terminal boards with screws. Faulty connection may cause a fire.

  • Page 39: Main Control Malfunction

    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 40 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 41 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 42: 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 43: Troubleshooting Flow Chart Of Main Control Malfunction

    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 system high Check if the wiring of Check if the high Replace the high pressure is higher than high pressure switch is...
  • Page 44 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 45 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 46 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 47 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 48 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 49 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 50 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 51 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 52 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 53 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 54 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 55 2.3 Interface AUHD18ND3FO/AUHD24ND3FO/ AUHD30ND3FO/ AUHD36ND3FO / AUHD42ND3FO /AUHD48ND3FO Main Control Board SILK-SCREEN INTERFACE INTERFACE INSTRUCTION AC-L Live wire input Live wire input AC-N Neutral wire input Neutral wire input PWR 1 Control power output Power supply interface to the drive [1- DC bus voltage, 3- GND] 1-pin: DC bus voltage 3-pin: DC bus GND...
  • Page 56 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 57 AUHD18ND3FO/AUHD24ND3FO/AUHD30ND3FO/AUHD36ND3FO/AUHD42ND3FO 1. Driving Board PRINTING INTERFACE PRINTING INTERFACE L2_2 PFC induction wire (blue) L1_1 PFC induction wire (brown) Neutral wire input (white) AC-L Live wire input (red) COMM/ Communication interface JTAG1 (Reserved) COMM1 Control power input DC-BUS1 Bus electric discharging interface (for testing) L2-1 PFC induction wire (yellow)
  • Page 58 2. Filtering Board Filtering Board PRINTING INTERFACE PRINTING INTERFACE N-OUT1 Neutral wire output 1 (white) N-OUT Neutral wire output (white) (only for 18k) L-OUT Live wire output (red) Grounding wire (Reserved) AC-L Live wire input (red) AC-N Neutral wire input (white) Technical Information...
  • Page 59 AUHD48ND3FO 1. Drive Board: PRINTING INTERFACE PRINTING INTERFACE AC-L Live wire input (red) L1-1 PFC induction wire (brown) Neutral wire input (white) L2-2 PFC induction wire (blue) L2-1 PFC induction wire (yellow) L1-2 PFC induction wire (white) Control power input JTAG1 (Reserved) COMM...
  • Page 60 2. Filtering Board PRINTING INTERFACE PRINTING INTERFACE N-OUT Neutral wire output (white) L-OUT Live wire output (red) DC-BUS DC bus interface (connect to AC-L Live wire input (red) drive board) Neutral wire input (white) (Reserved) Grounding wire (screw hole) Technical Information...
  • Page 61 2.4 IPM, PFC Testing Method 2.4.1 Method of Testing IPM Module 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.

  • Page 62: Wiring Diadram

    AUHD48ND3FO 3 WIRING DIADRAM 3.1 Outdoor unit The actual wiring should always refer to the wiring diagram of the unit. Model: AUHD18ND3FO Technical Information...
  • Page 63 Model: AUHD24ND3FO Model: AUHD30ND3FO Model: GUHD30ND3FO Technical Information...
  • Page 64 Model: AUHD36ND3FO Model: AUHD42ND3FO Technical Information...
  • Page 65 Model: AUHD48ND3FO 3.2 Indoor unit The actual wiring should always refer to the wiring diagram of the unit. 3.2.1 Duct Type Model: AFH18D3FI/AFH24D3FI/AFH30D3FI/AFH36D3FI/AFH42D3FI Technical Information...
  • Page 66 Model: AFH48D3FI 3.2.2 Floor Ceiling Type Model: ATH18D3FI/ATH24D3FI/ATH30D3FI/ATH36D3FI/ATH42D3FI/ATH48D3FI Technical Information...
  • Page 67 3.2.3 Cassette Type Model: AKH18D3FI Model: AKH24D3FI/AKH30D3FI/AKH36D3FI/AKH42D3FI Model: GKH24D3FI/GKH30D3FI/GKH36D3FI/GKH42D3FI Technical Information...
  • Page 68 Model: AKH48D3FI Technical Information...

  • Page 69: Disassembly And Assembly Procedure Of Main Parts

    4 DISASSEMBLY AND ASSEMBLY PROCEDURE OF MAIN PARTS 4.1 Outdoor Unit Remark: Before disassembly and assembly, make sure that the unit has been cut off from the power supply. Step Illustration Handling Instruction 1. Remove the top cover and handle; 1.
  • Page 70 24k/30k: Remark: Before disassembly and assembly, make sure that the unit has been cut off from the power supply. Step Illustration Handling Instruction 1. Remove the top cover and handle; 1. Remove external casing 2. Remove the grille, outer case, front side plate and right side plate.
  • Page 71 36k: Remark: Before disassembly and assembly, make sure that the unit has been cut off from the power supply. Step Illustration Handling Instruction 1. Remove the top cover and handle; 1. Remove external casing 2. Remove the grille, outer case, front side plate and right side plate.
  • Page 72 Step Illustration Handling Instruction Assemble the unit in the reverse 4. Assemble unit procedures of disassembly. 42k/48k: Remark: Before disassembly and assembly, make sure that the unit has been cut off from the power supply. Step Illustration Handling Instruction 1. Remove the top cover and handle;...

  • Page 73: Indoor Unit

    Step Illustration Handling Instruction 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 reverse 5.
  • Page 74 Step Illustration Handling Instruction 3. Remove the screws on fan Remove the screws on fan sub- sub-assembly. assembly. Rotate the propeller housing to 4. Overturn the propeller the air inlet according to arrow housing direction. Use inner hexagonal spanner to 5.
  • Page 75 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. Do not put filter screen near the high temperature heat source. Step Illustration Handling Instruction Compress the filter screen for return air down on the guide slot Disassembly of filter screen...
  • Page 76 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 screws 1.Disassembly of cover plate...
  • Page 77 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 Disassemble the fastening screw connecting left and right 1.
  • Page 78 4.2.2 CASSETTE-TYPE UNIT Removal and Assembly of Fan Motor Step Illustration Handling Instruction 1. Loosen the screws fixing Use screwdriver to loosen the the water tray screws fixing the water tray. 2. Remove the water tray Remove the water tray. 3.
  • Page 79 Step Illustration Handling Instruction 5. Loosen the screws fixing Use screwdriver to loosen the the motor screws fixing the water tray. 6. Remove the motor and Remove the motor and replace it replace it. 7. Tighten the screws fixing Use screwdriver to tighten the the motor screws fixing the motor.
  • Page 80 Removal and Installation of Drainage Pump Step Illustration Handling Instruction 1. Loosen the screws fixing Use screwdriver to loosen the the water tray screws fixing the water tray. Remove the water pump and 2. Remove the water tray replace it. 3.

  • Page 81: Floor Ceiling Type

    Step Illustration Handling Instruction 5. Connect the drainage pipe Connect the drainage pipe and and tighten the screws use screwdriver to tighten the fixing the water pump. screws fixing the water pump. 6. Mount the water tray and Use screwdriver to loosen the tighten the screws screws fixing the water tray.
  • Page 82 Disassembly of right and left finishing plates Remark: Make sure the power supply is cut off before disassembling and protect all the parts during disassembly. Do not scratch the outer parts. Step Illustration Handling Instruction Disassemble the screws as shown in the graph with screwdriver and then Disassembly of right and push upward to remove the right and...
  • Page 83 Disassemble of water-containing plate modules Remark: Make sure the power supply is cut off before disassembling and protect all the parts during disassembly. Step Illustration Handling Instruction Disassemble of water- Remove the water-containing plate containing plate modules modules. Disassembly of evaporator components Remark: Make sure that the power supply is cut off and protect the copper tube and aluminum fin.
  • Page 84 Disassembly of fan and motor components Remark: Make sure that the power supply is cut off before disassembling and protect all the parts during disas- sembly, especially the fastening screws for fans. Step Illustration Handling Instruction Press the buckle at the joints of front and back scroll cases with hands and pull upward to remove the front scroll case.
  • Page 85 Model: ATH18D3FI/ATH24D3FI/ATH48D3FI Disassembly of panel grating module Remark: Make sure that the power supply is cut off before disassembling and protect all the parts during disas- sembly. Do not put filter screen near the high temperature heat source. Step Illustration Handling Instruction 1.
  • Page 86 Disassembly of air deflecting plate modules Remark: Make sure the power supply is cut off before disassembling and protect all the parts during disassembly, especially the joints of the air deflecting plate. Step Illustration Handling Instruction Remove the air deflecting plates from the air deflecting plate support assembly, and then remove both Disassembly of sub-assy...
  • Page 87 Disassembly of fixing plate sub-assy for air sweeping fans Remark: Make sure that the power supply is cut off before disassembling and protect all the parts during disassembly. Step Illustration Handling Instruction Disassembly of fixing plate Remove the display board, mounting sub-assy for air sweeping support and mounting plate of fans...
  • Page 88 Disassembly of fan and motor components Remark: Make sure that the power supply is cut off before disassembling and protect all the parts during disas- sembly, especially the fastening screws for fans. Step Illustration Handling Instruction Unscrew the 2 screws of coupling, take out the rotating shaft and 1.

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