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Westinghouse WHU09CTA21S Service Manual

Cassette type
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AIR CONDITIONER
Cassette type
INDOOR
WHU09CTA21S
WHU12CTA21S
OUTDOOR
WHU09SZA21S
WHU12SZA21S
, WESTINGHOUSE, and INNOVATION YOU CAN BE SURE OF are trademarks of Westing house
Electric Corporation. Used under license by FUJITSU GENERAL AMERICA, INC. All Rights Reserved.
SERVICE MANUAL
WHU18CTA21S
WHU24CTA21S
WHU18SZA21S
REFRIGERANT
INVERTER
WHU36CTA21S
WHU24SZA21S
R410A
WHU36SZA21S
2021.12.24

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Summary of Contents for Westinghouse WHU09CTA21S

  • Page 1 INDOOR WHU09CTA21S WHU18CTA21S WHU36CTA21S WHU12CTA21S WHU24CTA21S OUTDOOR WHU09SZA21S WHU18SZA21S WHU24SZA21S WHU36SZA21S WHU12SZA21S , WESTINGHOUSE, and INNOVATION YOU CAN BE SURE OF are trademarks of Westing house Electric Corporation. Used under license by FUJITSU GENERAL AMERICA, INC. All Rights Reserved. 2021.12.24...

  • Page 2: Safety Summary

    Notices: • Product specifications and design are subject to change without notice for future improvement. • For further details, please check with our authorized dealer. SAFETY SUMMARY IMPORTANT NOTICE ● We pursue a policy of continuing improvement in design and performance of products. The right is therefore reserved to vary specifications without notice.
  • Page 3 ● Do not use any sprays such as insecticide, lacquer, hair spray or other flammable gases within approximately one (1) meter from the system. ● If circuit breaker or fuse is often activated, stop the system and contact your service contractor. ●...

  • Page 4: Specifications

    Specifications Cassette Type Inverter heat pump Model name WHU09CTA21S WHU12CTA21S WHU18CTA21S WHU24CTA21S Power supply 208/230 V ~ 60 Hz Power supply intake Outdoor unit Available voltage range 198—253 V 176—253 V 2.64 3.52 5.28 7.03 Rated Btu/h 9,000 12,000 18,000...
  • Page 5 Cassette Type Inverter heat pump Model name WHU36CTA21S Power supply 208/230 V ~ 60 Hz Power supply intake Outdoor unit Available voltage range 176—253 V 10.55 Rated Btu/h 36,000 Cooling 3.69—10.79 Min.—Max. Btu/h 12,600—36,800 Capacity 10.55 Rated Btu/h 36,000 Heating 4.40—12.49 Min.—Max.
  • Page 6 Type Inverter heat pump Model name WHU09SZA21S WHU12SZA21S WHU18SZA21S WHU24SZA21S Power supply 208/230 V ~ 60 Hz Available voltage range 198—253 V 176—253 V Airflow rate 1,355 (2,300) 1,853 (3,150) 2,235 (3,800) CFM (m Type × Q'ty Propeller fan × 1 Motor output dB (A) Sound pressure level *...
  • Page 7 Type Inverter heat pump Model name WHU36SZA21S Power supply 208/230 V ~ 60 Hz Available voltage range 176—253 V Airflow rate CFM (m 3,416 (5,800) Type × Q'ty Propeller fan × 1 Motor output dB (A) Sound pressure level * Dimensions in (mm) 37-15/16 ×...
  • Page 8 Dimensions Models: WHU09CTA21S and WHU12CTA21S Unit: in (mm) 24-7/16 (620) Liquid pipe Gas pipe 13-1-16 (331) 20-1/4 (515) 10-13/16 (275) a: Ceiling openings Display panel 24-7/16 (620) 3-11/16 2 (51) 2-7/16 (62) 22-7/16 (570) 2-1/16 (52) (93) Electric box Drain pipe...

  • Page 9: Installation Space Requirement

    Installation space requirement Provide sufficient installation space for product safety. Unit: in (mm) Nut (Locally purchased) (4-Suspension Bolts) Washer (Accesary) M10 or W3/8 (Locally purchased) 3/8 (10) or more 9-5/8 (245) 4-15/16 (110) Surface of ceiling 3/8 (10) 60 (1500) 60 (1500) 60 (1500) 120 (3000)
  • Page 10 Models: WHU18CTA21S and WHU24CTA21S Unit: in (mm) 37-3/8 (950) Liquid pipe Gas pipe 19-5/16 (490) 18-13/16 (478) Electric box 29-7/8 (760) Display panel a: Ceiling openings 33-1/8 (841) 7-1/8 (180) 5-1/8 (130) 33-1/16 (840) 4-5/16 (110) Drain pipe a: Ceiling openings Cassette grille (Option [Grid type]) in (mm) 33-7/8 to 35-13/16 (860 to 910)
  • Page 11 Installation space requirement Provide sufficient installation space for product safety. Unit: in (mm) W-Nut (Locally purchased) Washer (Accesary) 3/8 (10) or more 9-3/4 (248) 4-1/32 (102) 1-3/4 (45) Surface of ceiling *1/4 (7) *indicates the dimension between lower face of indoor unit and surface of ceiling.
  • Page 12 Model: WHU36CTA21S Unit: in (mm) 37-3/8 (950) Liquid pipe Gas pipe 19-5/16 (490) 18-13/16 (478) Electric box 29-7/8 (760) Display panel a: Ceiling openings 33-1/8 (841) 7-1/8 (180) 5-1/8 (130) 33-1/16 (840) 4-5/16 (110) Drain pipe a: Ceiling openings Cassette grille (Option [Grid type]) in (mm) 33-7/8 to 35-13/16 (860 to 910) - 11 -...
  • Page 13 Installation space requirement Provide sufficient installation space for product safety. Unit: in (mm) W-Nut (Locally purchased) Washer (Accesary) 3/8 (10) or more 11-3/4 (298) 4-1/32 (102) 1-3/4 (45) *1/4 (7) Surface of ceiling *indicates the dimension between lower face of indoor unit and surface of ceiling.
  • Page 14 Models: WHU09SZA21S and WHU12SZA21S Unit: in (mm) Electric box 11 (250) 11-1/4 (285) Liquid pipe Gas pipe 31-7/8 (810) 3 (76) 5-3/4 (146) 5-7/8 (148) Air inlet Drain pipe 4-3/8 (10) × 5/8 (17) Hole 5-7/8 (150) 20-1/8 (510) 12-3/8 (314) 2 (50) Air outlet - 13 -...
  • Page 15 Model: WHU18SZA21S Unit: in (mm) Electric box 12-1/4 (312) Liquid pipe Gas pipe 21-3/8 (542) 6-5/8 (168) 3 (76) 4-7/8 (123) 33-7/8 (860) 4-15/16 (125) 12-1/8 (309) Air inlet Drain pipe 2 (50) 4-7/16 (11) × 11/16 (17) Hole Air outlet - 14 -...
  • Page 16 Model: WHU24SZA21S Unit: in (mm) Electric box Gas pipe Liquid pipe 6-1/8 7-1/4 (185) 22-7/8 (580) (155) 2-5/8 (66) 37-3/8 (950) 3-1/2 (88) 40-7/8 (1,038) 13-9/16 (344) Air inlet Drain pipe 2-3/4 (70) 4- Ø5/8 (Ø15) Hole Air outlet - 15 -...
  • Page 17 Model: WHU36SZA21S Unit: in (mm) Electric box Liquid pipe Gas pipe 37-3/8 (950) 3-1/2 (88) 6-1/8 2-5/8 (66) (155) 40-7/8 (1,038) 7-1/4 (185) 22-7/8 (580) Air inlet 2-R 5/16 (7.5) 13-9/16 (344) Drain pipe 2-1/2 (65) 4- Ø5/8 (Ø15) Hole Air outlet - 16 -...

  • Page 18: Installation Space

    Installation space Models: WHU09SZA21S, WHU12SZA21S, WHU18SZA21S, WHU24SZA21S, and WHU36SZA21S ¢ Space requirement Provide sufficient installation space for product safety. CAUTION Keep the space shown in the installation examples. If the installation is not performed accordingly, it could cause a short circuit and result in a lack of operating performance.

  • Page 19: Refrigerant Circuit

    Refrigerant circuit Models: WHU09SZA21S, WHU12SZA21S, and WHU18SZA21S Cooling cycle Heating cycle List of components Compressor Suction temperature sensor Discharge temperature sensor 4-way valve Outdoor heat exchanger Ambient temperature sensor Coil temperature sensor Electric expansion valve Stop valve (Liquid) Stop valve (Gas) - 18 -...
  • Page 20 Model: WHU24SZA21S Cooling cycle Heating cycle List of components Compressor High pressure switch Discharge temperature sensor Suction temperature sensor 4-way valve Outdoor heat exchanger Coil temperature sensor Defrost temperature sensor Ambient temperature sensor Electric expansion valve Stop valve (Liquid) Stop valve (Gas) - 19 -...
  • Page 21 Model: WHU36SZA21S Cooling cycle Heating cycle List of components Compressor Discharge temperature sensor Suction temperature sensor 4-way valve Outdoor heat exchanger Coil temperature sensor Ambient temperature sensor Electric expansion valve Stop valve (Liquid) Stop valve (Gas) High pressure switch Low pressure switch Strainer - 20 -...

  • Page 22: Additional Refrigerant Charge

    Piping work and refrigerant charge Air tight test Do use nitrogen when performing air-tight test. Connect the gauge manifold using charging hoses with a nitrogen cylinder to the check joints of the liquid line and the gas line stop valves. Perform the air-tight test. Don't open the gas line stop valves.
  • Page 23 Checking components Check refrigerant system TEST SYSTEM FLOW Conditions: ① Compressor is running. ② The air condition should be installed in good ventilation. Tool: Pressure Gauge Technique: ① see ② feel ③ test See ----- Tube defrost. Feel ----- The difference between tube’s temperature. Test ----- Test pressure.
  • Page 24 Test system flow Cooling mode Test system pressure. The pressure on the Is the low pressure high side. normal at service part ? Recharge refrigerant after air purging with If the pressure is The pressure on the the vacuum close to static low side.

  • Page 25: Check Parts Unit

    Check parts unit 1. Indoor unit fan motor Cassette motor model (DC motor) 9K/12K:SIC-62FW-D857-15 18K/24K: EHDS50AQH 36K:SIC-72FW-D8124-2B Test in resistance. TOOL: Multimeter. Test the resistance of the main winding. The indoor fan motor fails if the resistance of main winding is 0(short circuit)or∞ （open circuit). Test in voltage TOOL: Multimeter.
  • Page 26 2. Outdoor unit fan motor DC motor 9K: SIC-52FV-F130-3 12K: SIC-62FV-D857-15 18K: ZWK511A805001 24K: SIC-71FW-D8121-1 36K: SIC-81FW-F1138-1 3. Compressor Compressor examine and repair 9K/12K: ASN108D43UFZA 18K: ATM150D23UFZ 24K: EATF250D22UMT 36K: ATF310D43UMT Thermal Sensor DC Inverter Power & Controller Compressor Test in resistance. TOOL: Multi-meter.
  • Page 27 Notes Don’t put a compressor on its side or turn over. Please assemble the compressor in your air conditioner rapidly after removing the plugs. Don’t place the comp. in air for a long time. Avoid compressor running in reverse caused by connecting electrical wire incorrectly. In case AC voltage is impressed to compressor the compressor performance will decrease because of its rotor magnetic force decreasing.

  • Page 28: Wiring Diagrams

    Wiring diagrams Models: WHU09CTA21S, WHU12CTA21S, WHU18CTA21S, WHU24CTA21S, and WHU36CTA21S Display board CN11 Room temperature sensor CN19 ROOM CN12 Coil temperature sensor COIL CN17 Water level switch WATER Pump motor Motor PUMP YEL/GRN Main control board VDC (C15.6) Door input CN16 GND (C15.4)
  • Page 29 Models: WHU09SZA21S, WHU12SZA21S, and WHU18SZA21S USE COPPER SUPPLY WIRES DC FAN MOTOR POWER TERMINAL PANEL AC-LIN (CN501) FG (CN901.1) Vsp (CN901.2) AC-NIN (CN502) Vcc (CN901.3) GND (CN901.4) EARTH (CN503) +310V (CN901.6) +310V YEL/GRN YEL/GRN Control Board N (CN602) SI (CN601) YEL/GRN CONNECTION TERMINAL...

  • Page 30: Control Board

    Model: WHU24SZA21S Control board Fan motor Pin No. Terminal Lead wire Function of terminal code color Compressor Blue Revolution pulse output 24 model: 0.75 Speed control voltage input Yellow 68 F Control power voltage input White Black Motor power voltage input Temperature 68 F 86 F...
  • Page 31 Model: WHU36SZA21S USE COPPERR SUPPLY WIRES Driver board Main Control board Fan motor Pin No. Terminal Lead wire Function of terminal code color Compressor Revolution pulse output Blue 36 model: 0.65 68 F Speed control voltage input Yellow Control power voltage input White Black Motor power voltage input...

  • Page 32: Troubleshooting

    Troubleshooting Trouble guide Troubleshooting for normal malfunction Troubleshooting Possible Reasons for Abnormality How to Deal With 1. Check power supply circuit; 2. Measure insulation resistance to 1. Power supply failure; ground to see if there is any 2. Trip of breaker or blow of fuse； leakage;...

  • Page 33: Display Panel

    (2) Fault codes indicated by LED lamps on display panel Lamp RUN (LED2, Red) and Lamp DEFROST (LED5, Green) flash. Lamp RUN displays fault code represented by 2- digit number, lamp DEFROST displays fault code represented by single digit number (as shown fig. below). For example,fault code 36: LED RUN & defrost flash 3 times at the same time, and LED DEFROST continue flashing 3 times, reports No.
  • Page 34 Outdoor unit 9K/12K/18K DC-Inverter unitary (Main control board upside-down) Fault code displayed by LED lamps on outdoor main control board. There are 3 LED lamps on control board, LED1, LED2 and LED3. LED1 indicates fault code represented by 2-digit number, LED2 indicates fault code represented by single digit number and LED3 indicates outdoor drive control fault.
  • Page 35 24K/36K Main control fault display Fault code will be displayed on digital tube board. Outdoor Control Board Digital Tube Drive fault code display The lamp of drive board flashing shows failure occurs. - 34 -...
  • Page 36 Drive fault code display The lamp of drive board flashing shows failure occurs. How many times the drive failure lamp flicks will show the failure code. Single phase models: LED1:Drive failure indicator - 35 -...

  • Page 37: Fault Codes

    Fault codes The following is the fault code table of outdoor units. Table 1 Outdoor fault code Fault Fault description Possible reasons for abnormality How to deal with Remarks code 1.Reconnect the outdoor 1.The outdoor ambient temperature ambient temperature sensor; Outdoor ambient sensor is connected loosely;...
  • Page 38 Fault Fault description Possible reasons for abnormality How to deal with Remarks code 1. Reconnect the wiring of the 1. The wiring of the overload overload protector; protector is connected loosely. 2. Replace the overload 2. The overload protector fails . protector;...
  • Page 39 Fault Fault description Possible reasons for abnormality How to deal with Remarks code 1.The cable between the control 1.Reconnect the cable between board and the driver board is the control board and the connected loosely; driver board; IPM and control board 2.The cable between the control 2.Replace the communication communication fault...
  • Page 40 The following is the fault code table of indoor unit. Table 2 Indoor fault code Fault Possible reasons for abnormality How to deal with Remarks Fault description code 1.1 Check whether there is something blocking the drain hose or the height of the drain hose is too high;...
  • Page 41 Fault Fault description Possible reasons f or abnormality How to deal with Remarks code EE in MCU fails, the unit Indoor EEPROM can run, but the function Replace EE data in MCU. Data 2 fault user has set is ineffective. 1.
  • Page 42 NOTE 1: If the indoor unit can not start or the indoor unit stops itself after 30s, at the same time the unit do not display the fault code, please check the fire and the socket of the control board. NOTE 2: If the indoor unit displays the 75,76,77,78 fault code after you turn on the unit, please check the TEST seat of the indoor control board or the TEST detection circuit to see whether short circuit...
  • Page 43 Table 3 Drive fault code (9K/12K/18K) Fault Fault description Possible reasons for abnormality How to deal with code Inverter DC voltage overload fault 1. Power supply input is too high 1. Check power supply； Inverter DC low voltage fault or too low; 2.
  • Page 44 Table 4 Drive Fault Code (24K/36K) Fault Fault description How to deal with Possible reasons for abnormality code 1. Check the compressor wire; 1. Compressor wire is not connected properly; 2. Change the driver board ; 2. Bad driver board components; Q axis current 3.
  • Page 45 Fault Fault description How to deal with Possible reasons for abnormality code 1. Voltage input is too low; 1. Check the power supply; Low DC voltage 200V 2. Drive board fault. 2. Change the driver board. Driver board read EE 1.
  • Page 46 Field setting Outdoor unit DIP switch DIP Switch Setting of Outdoor Unit (24K/36K) Turn off all power sources before setting. Without turning off, the switches settings are not refreshed and might be invalid. Mark of " " indicates the position of DIP switches. Setting is required SW2-4 SW2-1...
  • Page 47 Indoor unit parameter revision 1) Connecting wire remote controller with indoor unit Step 1: Removing the upper cover of the wired controller Upper cover of the wired controller Lower cover of the wired controller Insert a normal screw driver into the position, and gently rotate it.
  • Page 48 PARAMETER VALUE&REPRESENTATION PARAMETER PARAMETER NOTE REPRESENTATION DATA CODE DESCRIPTION TYPE (FUNCTION CODE) 0：Cancel Self Recovery of Power Self Recovery Break function； Integer of Power Break 1：Self Recovery of Power Break； others：invalid 0：Centigrade Temperature； Temperature Type Integer 1：Fahrenheit Temperature； others：invalid 0：Default display set temperature； Temperature Display Integer 1：Default display room temperature；...
  • Page 49 Running parameter query Running parameter can be referred to by 7 segment display or specified wired remote controller. Query by wired remote controller Operation: 1. Connect wired remote controller with indoor unit (same method as Indoor unit parameter revision) 2. Chang system parameter OPERATION: and parameter ①...
  • Page 50 Query by 7 segment display 7 segment display Digital Display Switch DC-Inverter outdoor control board 7 segment display Introduction It can be used to check outdoor running parameters. SWITCH INCREASE DECREASE There are 3 buttons on the digital display board： 1) SWITCH button: Indoor parameters and outdoor parameters can be selected in turn by pressing it.
  • Page 51 Parameters can be checked in the following table below. Parameter Descriptions code Protecting Code or Fault code P .1 Target Frequency P .2 Driving Frequency P .4 Outdoor EEV Opening P .5 Outdoor EEV Target Opening P .6 Upper DC Motor Revolving Speed P .8 AC Input Voltage P .9...

  • Page 52: Function Introduction

    Instructions for the function setting of access control, fire protection 1. Factory setting In case of using or canceling the access control / fire protection function, use the wired controller to modify the parameters of indoor unit. NOTE: please refer to “Site Setting” section in TC Manual for how to use the wired controller to modify the parameters of indoor unit.
  • Page 53 2) Control of entrance card connection: after the short circuit of entrance card interface, release power-on restrictions, the wired controller maintains power-off and the startup & shutdown control is effective. (2) Fire protection 1) Access to fire protection: the air conditioner shall be shut down and not blow waste cold or warm air after the access control signal is disconnected for 3 seconds.
  • Page 54 Instructions for the function setting of ON/OFF while On/off protection are available when you connect the corresponding cables correctly. activates the On/off function by setting the relevant parameters of the wired controller. When the On/off function is to be down when the white cable is disconnected. If other functions such as setting mode and remote-controller.

  • Page 55: Parts List

    Parts list Cassette grille (Optional parts) WH-AG4CT1 - 54 -...
  • Page 56 Cassette grille (Optional parts) WH-AG4CT1 Part number Description 2006699 Filter net 2006714 Louver assy 1520252 Step motor 1984063 Indicator PCB 2008040 Display panel - 55 -...
  • Page 57 Cassette grille (Optional parts) WH-AG4CT2 - 56 -...
  • Page 58 Cassette grille (Optional parts) WH-AG4CT2 Part number Description Filter net 1525479 Panel cover 1525469 Sealed plate 1525470 Display window 1571013 Indicator PCB 1570971 Accessory parts 1416317 1557789 Step motor 1525472 Louver assy 1525599 Flap assy - 57 -...
  • Page 59 Indoor unit WHU09CTA21S - 58 -...
  • Page 60 Indoor unit WHU09CTA21S Part number Description 2011390 Bell-mouth hood 2011371 Drain pan assembly 2011401 Turbo fan 1990901 Fan motor 2013213 Evaporator holder 2012933 Evaporator assembly 2013313 Screw 2013311 Insulation box 2013345 Fixed board 2009693 Cabinet 2013219 Electric box 1202700 Clamp...
  • Page 61 Indoor unit WHU12CTA21S - 60 -...
  • Page 62 Indoor unit WHU12CTA21S Part number Description 2011390 Bell-mouth hood 2011371 Drain pan assembly 2011401 Turbo fan 1990901 Fan motor 2013213 Evaporator holder 2012580 Evaporator assembly 2013313 Screw 2013311 Insulation box 2013345 Fixed board 2009693 Cabinet 2013219 Electric box 1202700 Clamp 1471693 Clamp 1413386...
  • Page 63 Indoor unit WHU18CTA21S - 62 -...
  • Page 64 Indoor unit WHU18CTA21S Part number Description 1913587 Top plate 1416128 Air duct plate 1457336 Fan motor 1509697 Cabinet 1510003 Insulation box 1514478 Pump motor 1515344 Cover 1515168 Drain hose 1416022 Turbo fan 1415899 Drain pan assembly 1416026 Bell-mouth hood 2014260 Electric box 1415950 Electric box cover...
  • Page 65 Indoor unit WHU24CTA21S - 64 -...
  • Page 66 Indoor unit WHU24CTA21S Part number Description 1913587 Top plate 1416128 Air duct plate 1457336 Fan motor 1509697 Cabinet 1510003 Insulation box 1514478 Pump motor 1515344 Cover 1515168 Drain hose 1416022 Turbo fan 1415899 Drain pan assembly 1416026 Bell-mouth hood 2014260 Electric box 1415950 Electric box cover...
  • Page 67 Indoor unit WHU36CTA21S - 66 -...
  • Page 68 Indoor unit WHU36CTA21S Part number Description 1913587 Top plate 1416128 Air duct plate 1416353 Fan motor 1509689 Cabinet 1510203 Insulation box 1514478 Pump motor 1515344 Cover 1515168 Drain hose 1416022 Turbo fan 1415926 Drain pan assembly 1416069 Bell-mouth hood 2014260 Electric box 1415950 Electric box cover...
  • Page 69 Outdoor unit WHU09SZA21S - 68 -...
  • Page 70 <Refrigerant cycle> - 69 -...
  • Page 71 <Electrical parts> - 70 -...
  • Page 72 Outdoor unit WHU09SZA21S Part number Description Part number Description 2006876 Fan guard 1555574 Stop valve 2103279 Intake grille 2033746 Soundproof cotton 1203994 2034316 Soundproof cotton Propeller fan blade Soundproof cotton 1998597 2034281 1932167 DC motor 1961881 Base assembly 2009048 Motor bracket 1854766 Tube electric heater Connecting board...
  • Page 73 Outdoor unit WHU12SZA21S - 72 -...
  • Page 74 <Refrigerant cycle> - 73 -...
  • Page 75 <Electrical parts> - 74 -...
  • Page 76 Outdoor unit WHU12SZA21S Part number Description Part number Description 2006876 Fan guard 1555574 Stop valve 2103279 Intake grille 2033746 Soundproof cotton 1203994 2034316 Soundproof cotton Propeller fan blade 1998597 2034281 Soundproof cotton 1932167 DC motor 1961881 Base assembly 2009048 Motor bracket 1854766 Tube electric heater Connecting board...
  • Page 77 Outdoor unit WHU18SZA21S - 76 -...
  • Page 78 <Refrigerant cycle> - 77 -...
  • Page 79 <Electrical parts> - 78 -...
  • Page 80 Outdoor unit WHU18SZA21S Part number Description Part number Description Fan guard 2006879 1848625 EEV coil 2091948 Intake grille 2089001 1263647 2034414 Soundproof cotton Propeller fan blade 1559520 2034398 Soundproof cotton 1803035 Axis sheath 2034291 Soundproof cotton 1859837 DC motor 2087547 Base assembly Motor bracket 1854710...
  • Page 81 Outdoor unit WHU24SZA21S - 80 -...
  • Page 82 < Refrigerant cycle > - 81 -...
  • Page 83 < Electrical parts > - 82 -...
  • Page 84 Outdoor unit WHU24SZA21S Part number Description Part number Description 2010128 Fan guard 2005163 Condenser assembly 2118319 Front panel 1993782 Compressor 1469450 Left guard filter 1385852 EEV coil Mounting plate 1382782 1458701 1231108 1914293 Stop valve assy 1405350 Propeller fan blade 1469377 5/8 stop valve assy Fan motor...
  • Page 85 Outdoor unit WHU36SZA21S - 84 -...
  • Page 86 <Refrigerant cycle> - 85 -...
  • Page 87 < Electrical parts > 46 47 48 - 86 -...
  • Page 88 Outdoor unit WHU36SZA21S Part number Description Part number Description 1556829 Guard filter 1385852 EEV coil 1400459 Top panel 2000085 Tube electric heater 1893556 Motor bracket 1993788 Plate cover DC motor Crankcase heater 1498534 1391303 1947347 Propeller fan blade 1926428 Compressor 1424902 Mounting plate 1821777...
  • Page 89 Accessories Indoor unit Part name Q’ty Part name Q’ty Use and installation instructions Built-in type drain pump Dry battery Wireless remote controller Indoor installation accessory kit Wireless remote controller operation manual (For 18, 24, 36 models) Union nut (Gas) Wireless remote controller holder Union nut (Liquid) Warranty card Outdoor unit...

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