Fujitsu S24LDC Service Instruction
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Fujitsu S24LDC Service Instruction

Fujitsu S24LDC Service Instruction

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SERVICE
INSTRUCTION
R410A
The model that describes in the text includes the following model.
Description model
AS * B24LDC
AO * S24LDC
SPLIT TYPE
ROOM AIR CONDITIONER
WALL MOUNTED
INVERTER
Models
Indoor unit
AS * B24LDC
Included model
AS * B24LDC
AO * S24LDC
AO * S24LDL
type
Outdoor unit
AO * S24LDC

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  • Page 1 WALL MOUNTED type INVERTER SERVICE INSTRUCTION Models Indoor unit Outdoor unit AO * S24LDC AS * B24LDC R410A The model that describes in the text includes the following model. Description model Included model AS * B24LDC AS * B24LDC AO * S24LDC...

  • Page 2: Table Of Contents

    CONTENTS 1. SPECIFICATION AS*B24LDC, AO*S24LDC....................01-01 2. DIMENSIONS AS*B24LDC, AO*S24LDC ....................02-01 3. REFRIGERANT SYSTEM DIAGRAM AS*B24LDC, AO*S24LDC ....................03-01 4. CIRCUIT DIAGRAM AS*B24LDC, AO*S24LDC....................04-01 5. DESCRIPTION OF EACH CONTROL OPERATION 1. COOLING OPERATION....................05-01 2. HEATING OPERATION....................
  • Page 3 7. TROUBLE SHOOTING 1. WHEN THE UNIT DOES NOT OPERATE AT ALL............ 07-01 2. SELF DIAGNOSIS FUNCTION.................. 07-02 3. TROUBLE SHOOTING METHOD 4. SELF-DIAGNOSIS FUNCTION AND CHECKING POINTS........07-03 5. SERIAL SIGNAL DIAGNOSIS..................07-09 6. IPM PROTECTION..................... 07-10 7. ACTIVE FILTER FAILURE..................07-11 8.

  • Page 4: Specification

    R410A WALL MOUNTED type INVERTER 1 . SPECIFICATIONS...

  • Page 5: As*B24Ldc Ao*S24Ldc

    SPECIFICATIONS AS*B24LDC MODEL NAME AO*S24LDC PHASE POWER SOURCE FREQUENCY VOLTAGE 7.10 (0.9~8.0) CAPACITY 24,200 Btu /h (3,100~27,300) 2.21 POWER CONSUMPTION (0.11~2.62) kW /kW 3.21 Btu /(h.W) 11.0 RUNNING CURRENT COOLING POWER FACTOR PERFORMANCE MAXIMUM CURRENT 12.0 L /hr MOISTURE REMOVAL...
  • Page 6 SPECIFICATIONS AS*B24LDC MODEL NAME AO*S24LDC CONNECTING METHOD Flare 6.35 LIQUID SIDE PIPE SIZE 15.88 GAS SIDE 5/8" STANDARD PIPE LENGTH MAXIMUM PIPE LENGTH INSTALLATION CHARGE LESS PIPE LENGTH g /m AMOUNT OF ADDITIONAL CHARGE oz. /ft. 3/16 MAXIMUM HEIGHT DIFFERENCE...

  • Page 7: Dimensions

    R410A WALL MOUNTED type INVERTER 2 . DIMENSIONS...

  • Page 8: As*B24Ldc, Ao*S24Ldc

    D I M E N S I O N S Unit : mm (inch) Models : AS*B24LDC / AO*S24LDC INDOOR UNIT (12-5/8") 998 (39-1/4") 228 (9") OUTDOOR UNIT 508 (20") 540 (21-1/4") 125 (4-7/8") 66 (2-5/8") 790 (31-1/8") 315 (12-3/8")

  • Page 9: Refrigerant System Diagram

    R410A WALL MOUNTED type INVERTER 3 . REFRIGERANT SYSTEM DIAGRAM...

  • Page 10: As*B24Ldc, Ao*S24Ldc

    R E F R I G E R A N T S Y S T E M D I A G R A M Models : AS*B24LDC / AO*S24LDC Heat exchanger 3-Way ( INDOOR ) valve Muffler 2-Way valve 4-Way valve...

  • Page 11: Circuit Diagram

    R410A WALL MOUNTED type INVERTER 4 . CIRCUIT DIAGRAM...

  • Page 12: As*B24Ldc, Ao*S24Ldc

    CIRCUIT DIAGRAM Models : AS*B24LDC / AO*S24LDC 04-01...

  • Page 13: Description Of Each Control Operation

    R410A WALL MOUNTED type INVERTER 5 . DESCRIPTION OF EACH CONTROL OPERATION...

  • Page 14: Cooling Operation

    1. COOLING OPERATION 1-1 COOLING CAPACITY CONTROL A sensor (room temperature thermistor) built in the indoor unit body will usually perceive difference or variation between a set temperature and present room temperature, and controls the operation frequency of the compressor. * If the room temperature is 2 C higher than a set temperature, the compressor operation frequency will attain to maximum performance.

  • Page 15: Heating Operation

    2. HEATING OPERATION 2-1 HEATING CAPACITY CONTROL A sensor (room temperature thermistor) built in the indoor unit body will usually perceive difference or variation between a set temperature and present room temperature, and controls the operation frequency of the compressor. * If the room temperature is lower by 3 C than a set temperature, the compressor operation frequency will attain to maximum performance.

  • Page 16: Dry Operation

    3. DRY OPERATION 3-1 INDOOR UNIT CONTROL The compressor rotation frequency shall change according to the temperature, set temperature, and room temperature variation which the room temperature sensor of the indoor unit body has detected as shown in the Table 3. However, after the compressor is driven, the indoor unit shall run at operation frequency of 58Hz, for a minute.

  • Page 17: Auto Changeover Operation

    4. AUTO CHANGEOVER OPERATION When the air conditioner is set to the AUTO mode by remote control, operation starts in the optimum mode from among the HEATING, COOLING, DRY and MONITORING modes. During operation, the optimum mode is automatically switched in accordance with temperature changes. The temperature can be set between 18 C and 30 C in 1 C steps.

  • Page 18: Indoor Fan Control

    5. INDOOR FAN CONTROL (1).Fan speed ( Table 5 : Indoor Fan Speed ) AS*B24LDC Operation mode Air flow mode Speed (rpm) Heating 1,380 1,280 1,170 Quiet Cool air prevention S-Lo Cooling 1,380 1,170 Quiet (2).FAN OPERATION The airflow can be switched in 5 steps such as AUTO, QUIET, LOW, MED, HIGH, while the indoor fan only runs.
  • Page 19 (5).HEATING OPERATION (Fig.7) Switch the airflow [AUTO], and the airflow change - over ( Heating:AUTO) indoor fan motor will run according to a room temperature, as shown in When the room Figure 7. temperature rises On the other hand, if switched L O W m o d e -1.0 C [HIGH]...

  • Page 20: Outdoor Fan Control

    6. OUTDOOR FAN CONTROL (1). Fan speed Table 6 : Fan speed (Cooling, Dry) Outdoor temperature Cooling Over than 12 C 950/820/670/500rpm 550rpm AS*B24LDC 400/280/230rpm Less than 12 C 400/280/230rpm Table 7 : Fan speed (Heating) Heating AS*B24LDC 1100/1000/730/670/550/450rpm The outdoor fan speed is changed in the range of the speed shown in the above table, based on the frequency of the compressor.

  • Page 21: Louver Control

    7. LOUVER CONTROL (1). LOUVER CONTROL When the indoor control interface device receives a control signal light from the remote control, it will actuate, the step motor according to the control signal, and set the louver to each position. In addition, if the air conditioner is stopped, vertical louver will be closed automatically. Vertical Air Direction Adjustment (Function Range) Each time the button is pressed, the air direction range will change as follow:...
  • Page 22 (2). SWING OPERATION To select Vertical Airflow Swing Operation When the swing signal is received from the remote controller, the vertical louver starts to swing. (Swinging Range) Cooling mode / Dry mode / Fan mode( Heating mode / Fan mode( When the indoor fan is at S-Lo or Stop mode, the swinging operation is interrrupted and it stops at either right end or left end.

  • Page 23: Compressor Control

    8. COMPRESSOR CONTROL (1). OPEARTION FREQUENCY RANGE The operation frequency of the compressor is different based on the operation mode as shown in the table 9. (Table 9 : Compressor Operation Frequency Range) Cooling Heating AS*B24LDC 15Hz 115Hz 15Hz 130Hz 34Hz (2).

  • Page 24: Timer Operation Control

    9. TIMER OPEARTION CONTROL The table 10 shows the available timer setting based on the product model. (Table 10 : Timer Setting) ON TIMER / OFF TIMER PROGRAM TIMER SLEEP TIMER AS*B24LDC (1). OFF TIMER AND ON TIMER OFF timer : When the clock reaches the set time, the air conditioner will be turned off. Operation mode Stop mode Set time of timer...
  • Page 25 (3). SLEEP TIMER If the sleep is set, the room temperature is monitored and the operation is stopped automatically. If the operation mode or the set temperature is change after the sleep timer is set, the operation is continued according to the changed setting of the sleep timer from that time ON. In the cooling operation mode When the sleep timer is set, the setting temperature is increased 1 C.

  • Page 26: Electronic Expansion Valve Control

    10. ELECTRONIC EXPANSION VALVE CONTROL The most proper opening of the electronic expansion valve is calculated and controlled under the present operating condition based on the following values. The compressor frequency, the temperatures detected by the discharge temperature sensor, the indoor heat exchanger sensor, the outdoor heat exchanger sensor, and the outdoor temperature sensor.

  • Page 27: Manual Auto Operation (Indoor Unit Body Operation)

    15. MANUAL AUTO OPERATION (Indoor unit body operation) If MANUAL AUTO Button is set, the operation is controlled as shown in Table 12. If the remote control is lost or battery power dissipated, this function will work without the remote control.

  • Page 28: Defrost Operation Control

    18. DEFROST OPERATION CONTROL (1). CONDITION OF STARTING THE DEFROST OPERATION The defrost operation starts when the outdoor heat exchanger temperature sensor detects the temperature lower than the values shown in Table 15. (Table 15 : Condition of starting Defrost Operation) Compressor operating time time defrosting after starting...
  • Page 29 Defrost Flow Chart The defrosting shall proceed by the integrating operation time and outdoor heat exchanger temperature as follows. Heating operation start : Compressor ON (Not defrosted for 10 minutes) (In case of 1st defrost) (In case of 2nd and later defrost) Compressor integrating Compressor integrating Compressor integrating...

  • Page 30: Off Defrost Operation Control

    19. OFF DEFROST OPEARTION CONTROL When operation stops in the [Heating operation] mode, if frost is adhered to the outdoor unit heat exchanger, the defrost operation will proceed automatically. In this time, if indoor unit operation lamp flashes slowly (7 sec ON / 2 sec OFF), the outdoor unit will allow the heat exchanger to defrost, and then stop.

  • Page 31: Various Protections

    20. VARIOUS PROTECTIONS (1). DISCHARGE GAS TEMPERATURE OVERRISE PREVENSION CONTROL The discharge gas thermosensor (discharge thermistor : Outdoor side) will detect discharge gas temperature. When the discharge temperature becomes higher than Temperature ,the compressor frequency is decreased 20 Hz, and it continues to decrease the frequency for 20 Hz every 120 seconds until the temperature becomes lower than Temperature .

  • Page 32: Forced Cooling Operation

    (4). COOLING PRESSURE OVERRISE PROTECTION When the outdoor unit heat exchange sensor temperature rises to temperature or greater, the compressor is stopped and trouble display is performed. (Table 20 : Cooling Pressure Over Rise Protection Function Temperature) Temperature AS*B24LDC 67 C (5).

  • Page 33: Air Clean Operation

    23. AIR CLEAN OPERATION The air clean operation switches ON and OFF as follows every time it receives AIR CLEAN signal from remote controller. Status before receiving Air Clean signal Status upon receiving Air Clean signal Operation stops Operation keeps stopping In operation It continues to operate (Air Clean operation is OFF.)

  • Page 34: Refrigerant Caution -R410A

    R410A WALL MOUNTED type INVERTER 6 . REFRIGERANT CAUTION -R410A-...

  • Page 35: R410A Tools

    1. R410A TOOLS This air conditioner used R410A. TOOLS AND EQUIPMENT (R410A) For installation and servicing, it is necessary to prepare the tools and machines that are different from the previous Pressure control and Gas charging refrigerant. Circuit switching Safety charger Fig.4-13 Mark shows the exclusive use for R410A.

  • Page 36: Precaution For Installation

    2. PRECAUTION FOR INSTALLATION Precaution for installation Pipe diameter, recommended material and wall thickness Nominal diameter 1/4" 3/8" 1/2" 5/8" 3/4" 7/8" 1" 1 1/8" 1 1/4" 1 3/8" 1 1/2" (in) Outside diameter 6.35 9.52 12.70 15.88 19.05 22.22 25.40 28.58 31.75 34.92...
  • Page 37 Be careful not to mix moisture and contamination into the pipe Moisture contamination in the pipe is a cause of trouble. Air purge Always use a vacuum pump to purge air. Refrigerant charge Don't charge from the phase side. Do it always from the liquid phase side.

  • Page 38: Precaution For Servicing

    3. PRECAUTION FOR SERVICING Feature 1 Refrigerant oil is different from before. Precaution on Tools Refrigerant oil for Different point from New Refrigerant previous one Use the gauge manifold and charge hose Synthetic oil Absorbent character for New Refrigerant(HFC), which shall is high.

  • Page 39: New Refrigerant R410A

    4. NEW REFRIGERANT R410A What is HFC ? Phase-out schedule of HCFC according to Montreal protocol (HCFC consumption of 1989) + 100% = (CFC consumption of 1989) x 2.8% total abolition only service use started control 0.5% 1996 2000 2004 2010 2015 2020...
  • Page 40 Ozone Layer depleting mechanism sunbeam Ozone CFCl What is CFC and HCFC? CFC : Chloro-Fluoro-Carbon High ODP( ozone depletion potential ) chemical compound, including chlorine. (ODP:0.6-1.0) For example : R12 (for refrigerator and car air-conditioner) HCFC : Hydro-Chloro-Fluoro-Carbon Low ODP chemical compound, including chlorine and hydrogen. (ODP:0.02-01) For example : R22 (for air-conditioner) : Hydro-Fluoro-Carbon...
  • Page 41 Summary of R407C and R410A characteristics R410A R407C higher system similar pressure as R22 performance (possible to design Advantage Near-Azeotropic large equipment) refrigerant 1.6 times higher Zeotropic refrigerant pressure than R22 Disadvantage (handle with care) (difficult to design against pressure resistance) Large Air-Conditioners Suitable for Small Air-Conditioners...

  • Page 42: Defference From Conventional Model(R22) And Precautions

    5. DEFFERENCE FROM CONVENTIONAL MODEL (R22) AND PRECAUTIONS • Use new synthetic oils such as ester because HFC series refrigerant has less solubility with mineral oils conventionally used for R22. • As these new synthetic oils are easily influenced by moisture and dusts, they must be treated more care- fully than the conventional lubricating oils.

  • Page 43: Trouble Shooting

    R410A WALL MOUNTED type INVERTER 7 . TROUBLE SHOOTING 1. When the unit does not operate at all (Operation lamp and Timer lamp do not light up) 2. Self Diagnosis Function (Either Operation lamp or Timer lamp is blinking) * How to operate the self-diagnosis function * Self- diagnosis table and Check points 3.
  • Page 44 Does not operate at all (Operation Lamp and Timer Lamp do not light up) [Check Point] (1) Is the input power voltage from the exclusive circuit AC outlet normal? (2) Is the AC plug inserted to the AC outlet securely and not loose? (3) Check if each connector is inserted securely.

  • Page 45: Self Diagnosis Function

    SELF-DIAGNOSIS FUNCTION This function memorizes the self-diagnosis function (lamp display) in the in door control P.C.Board when trouble occurs. (The memory contents are not destroyed even when the power cord is unplugged from the AC outlet.) Self-diagnosis function [lamp display] (memory reading) (1) When error occurs, it is indicated by blinking [Operation lamp (Red)] and [Timer lamp (Green)].

  • Page 46: Self-Diagnosis Function And Checking Points

    Self - diagnosis function and Checking points Error contents Error Indication Wired remote Small Div. Contents Diagnosis Method controller (Protection) Transmission Opera Timer tion error 0.5 sec Serial reverse transfer At the start up, the indoor unit does not receive the signal for 10 consecutive seconds from the time when the 2 times error starting...
  • Page 47 0.5 sec Room temperature The room temperature thermistor detected a abnormal temperature when the power was turned on. Indoor unit sec. 2 times thermistor defective > Remote control does not operate. thermistor error 2 times [Diagnosis Point] - Check Thermistor resistance value (Refer to “Thermistor characteristics table”). - Controller PCB defective.
  • Page 48 Indoor unit 0.5 sec Forced Auto Switch Forced Auto Switch becomes ON for 10 consecutive seconds. sec. Controller 2 times Error > It indicates the error but the operation continues. 4 times Error [Diagnosis Point] - Check if forced Auto Switch is kept pressed. - Forced Auto Switch defective.
  • Page 49 Outdoor Unit 0.5 sec IPM Protection Abnormal current value of IPM is detected > Permanent stop. Controller sec. 2 times Error 5 times [Diagnosis Point] - Heat radiation is blocked (Inlet/Outlet) - Check if Outdoor Fan is defective (does not rotate). - Controller PCB defective (Refer to after mentioned “IPM diagnosis”) - Refrigeration cycle defective (Refer to after mentioned “Refrigeration cycle diagnosis”).
  • Page 50 0.5 sec No Display Indoor Fan Lock Error Indoor Fan The indoor fan speed is 0 rpm after 56 seconds from starting operation or from the time the fan mode was Motor Error sec. 2 times changed. > Operation stops. (It releases by sending the operation stop signal from the remote controller.) 6 times [Diagnosis Point] - Fan motor connector loose/ defective contact.
  • Page 51 Other Error 0.5 sec Active Filter Error Output voltage error of Active filter is detected. > Permanent stop. sec. 2 times (Permanent Stop) 8 times [Diagnosis Point] - Check the wiring connection (Connector is loose/open, Choke coil) - Controller PCB defective (Refer to after mentioned “Active Filter diagnosis”) 0.5 sec Active Filter Error Active filter error or instantaneous cut off error is detected.

  • Page 52: Serial Signal Diagnosis

    Serial Signal Diagnosis [Check Point] Check and find out if the cause is at Indoor unit or Outdoor unit. * Remove the side cover of Outdoor unit for testing the Outdoor unit connection terminals with a meter. * Turn on the power and press [TEST] button of Remote control. [Checking Flow Chart] CAUTION: Do not touch the terminals or electrical components to avoid electric shock.

  • Page 53: Ipm Protection

    IPM Protection [Checking Points] Check the following points and locae the cause in the outdoor unit. [Cause]  (1) Compressor failure  (2) Refrigeration cycle failure  (3) PC Board defective  (4) IPM defective  (5) Incorrect wiring [First step] Measure the DC voltage at terminals (between Electrolytic Capacitor and discharge resistance) in the Inverter Controller Assy, and make sure it is lower than DC5V.

  • Page 54: Active Filter Failure

    Active Filter Failure [Checking points] Check the following points and locae the cause in the outdoor unit. [Cause] (1) Incorrect wiring (2) Active Filter Module defective (3) PC Board defective (4) DC voltage detectiion circuit defective [First Step]  Measure the DC voltage at terminals (between Electrolytic Capacitor and discharge resistance) in the Inverter Controller Assy, and make sure it is lower than DC5V.

  • Page 55: Trouble Shooting Of Refrigerant Cycle

    Trouble Shooting of Refrigerant Cycle [Diagnosis Table for Defective Component] : Item of most possible cause Cooling High Compressor Discharge IPM Protection Pressure Location error Temperature Error Protection Refrigerant leak Compressor failure(*) EEV failure (*) Thermistor failure (*) (*) Trouble Shooting Method (1) Checking method of the compressor failure Insert the AC plug and start up the cooling operation.

  • Page 56: Appending Data

    R410A WALL MOUNTED type INVERTER 8 . APPENDING DATA 1. Jumper setting of Indoor unit and Outdoor unit 2. Outdoor unit Pressure Value and Total Electric Current Curve 3. Thermistor Resistance Values 4. Capacity/Input Data...
  • Page 57 JM6 (JP) JM7 (JP) Cooling Heating *Default *Default value changes by the setting temperature and the outside temperature. [Outdoor Unit] AO*S24LDC JM903 JM902 JM901 24LDC Normal Preheat Higher Preheat - it is possible to select the higher or standard level of preheating function.
  • Page 58 Outdoor Unit Low Pressure Value and Outdoor Total Electric Current Curve (Cooling) Model Name : AS*B24LDC [Condition] Ambient Indoor / Outdoor - Same temperature temperature Refrigerant Standard amount amount Piping 7.5m (Height difference 1m) length Power 50Hz - 230V voltage Operation TEST mode (Cooling), Hi Fan, Horizontal direction, Front air flow condition...
  • Page 59 Outdoor Unit High Pressure Value and Outdoor Total Electric Current Curve (Heating) Model Name : AS*B24LDC [Condition] Ambient Indoor 15 - 23degC, Outdoor 2 - 12degC temperature Refrigerant Standard amount amount Piping 7.5m (Height difference 1m) length Power 50Hz - 230V voltage Operation TEST mode (Heating), Hi Fan, Lower direction, Front air flow...
  • Page 60 Thermistor resistance values Room temperature thermistor Indoor heat exchanger thermistor Characteristics of room temperature thermistor Voltage(V) Tempe F Tempe C Resistance(k ) Voltage(V) Tempe F Tempe C Resistance(k ) 40.00 35.00 32.0 0.00 33.62 1.15 32.0 0.00 176.03 1.10 30.00 41.0 5.00 25.93...
  • Page 61 Outdoor heat exchanger thermistor Outdoor temperature thermistor Characteristics of heat exchanger thermistor (Outdoor) Tempe F Tempe C Resistance(k ) Voltage(V) Tempe F Tempe C Resistance(k ) Voltage(V) 100.00 -22.0 -30.00 88.42 0.254 -22.0 -30.00 181.60 0.87 -13.0 -25.00 64.89 0.341 -13.0 -25.00 133.30...
  • Page 62 AS*B24LDC Capacity/Input data (1/2) Heating <Capacity> Maximum operation Current release works 140% Indoor DB : 20 C 130% 120% Without Frost 110% 100% Current release works Rated operation With Frost Without Frost Outdoor DB( C) <Input> 180% Indoor DB : 20 C Without Frost 170% Maximum operation...
  • Page 63 (2/2) Cooling <Capacity> 150% Indoor : 27/19 C 140% 130% 120% 110% 100% Outdoor DB( C) <Input> 120% Indoor : 27/19 C 110% 100% Outdoor DB( C) *Both capacity and input decrease when temperature is 19 or less degrees C, for compressor frequency restrictions operate.

  • Page 64: Replacement Parts

    R410A WALL MOUNTED type INVERTER 9 . REPLACEMENT PARTS...
  • Page 65 R E P L A C E M E N T P A R T S INDOOR UNIT Models : AS*B24LDC 09-01...
  • Page 68 REPLACEMENT PARTS Models : AS*B24LDC 09-04...
  • Page 69 REPLACEMENT PARTS Model : AO*S24LDC 09-05...
  • Page 71 REPLACEMENT PARTS Model : AO*S24LDC PROCESS Wiring HEAT SINK SUB ASSY REGULATIONS Do the twist work with the following combination. (Twist it 1 time is to twist 360 .) red (W16) black(W17) two times. (Width of twist.30~40mm) Connect a wire (red) with terminal to +POLE of ACTPM...
  • Page 72 REPLACEMENT PARTS Model : AO*S24LDC PROCESS Assemble COIL, CHOKE and WIRE with TERMINAL REGULATIONS Like a rough sketch, assemble COIL, CHOKE to CASE ( INV ) Like a rough sketch, assemble WIRE with TERMINAL after assembling COIL, CHORK. (Pay attention to direction of WIRE with TERMINAL.) Like a rough sketch, twist WIRE with TERMINAL and assemble it certainly.
  • Page 73 REPLACEMENT PARTS Model : AO*S24LDC Either will do, because Note the wiring route. Pay attention the direction of the TERMINAL. there is no polarity. Width of twist. 40~50mm Don't go out the groove. 09-09...
  • Page 74 REPLACEMENT PARTS Model : AO*S24LDC PROCESS Assemble PWB ASSY(CAPACITOR) and Wiring PWB ASSY (K05DG CAPACITOR) REGULATIONS BINDER M Like figure 1, assemble PWAB ASSY (CAPACITOR) to the SPACER Pay attention to direction of the PWAB ASSY, when assembling PWB ASSY (Have the wire with the terminal (white W12, purple W13) on the REACTOR side.)
  • Page 75 REPLACEMENT PARTS Model : AO*S24LDC figure 2 Fix WIRE into WIRE CLAMPER firmly. TM301 TM302 Fix WIRE into groove firmly. BINDER M Like a rough sketch, bind BINDER M Don't upturn the cut end of BINDER M and don't bind outside CASE (INVERTER)
  • Page 76 REPLACEMENT PARTS Model : AO*S24LDC PROCESS Wiring lead wire of PWB (FILTER) REGULATIONS Like a rough sketch, twist lead wire Do the twist work with the following combination. (Twist it 1 time is to twist 360 .) Width of twist. 40~50mm...
  • Page 77 REPLACEMENT PARTS Model : AO*S24LDC Don't stick out lead wire from groove. CN101 Fix WIRE into groove Put lead wire between. 09-13...
  • Page 78 REPLACEMENT PARTS Model : AO*S24LDC PROCESS Assemble PWB SUB ASSY (FILTER) to CASE (INV) SCREW, TAPPING REGULATIONS Pay attention so as not to fasten lead wire, when assembling PWB SUB ASSY (FILTER) to CASE (INV) Like figure 1, connect lead wire of orange W28 and brown W29.
  • Page 79 REPLACEMENT PARTS Model : AO*S24LDC figure 1 W28 orange TM101 TM102 W29 brown Fasten wire into groove. SCREW, TAPPING 09-15...
  • Page 80 REPLACEMENT PARTS Model : AO*S24LDC PROCESS Assemble PWB ASSY REGULATIONS PWB ASSY (K05CU) MAIN Like a rough sketch, assemble PWB ASSY (MAIN) to PWB HOLDER Insert PWB in nail of this side accurately. PWB HOLDER Don't knock it in CASE, Hold it in nail of this when fitting PWB.
  • Page 81 REPLACEMENT PARTS Model : AO*S24LDC PROCESS Wiring lead wire REGULATIONS Like a rough sketch, wire lead wire. WIRE with CONNECTOR L=350 Do the twist work with the following combination. WIRE with CONNECTOR L=250 (Twist it 1 time is to twist 360 .)
  • Page 82 REPLACEMENT PARTS Model : AO*S24LDC WIRE with CONNECTOR WIRE with CONNECTOR L=350 L=250 CN400 CN11 CN40 WIRE with CONNECTOR CN42 L=200 CN301 CN303 Insert these WIRE with CONNECTOR into groove. Wire must not stick out from STOPPER To stick out is NG...
  • Page 83 REPLACEMENT PARTS Model : AO*S24LDC PROCESS Wiring CABLE REGULATIONS BINDER C Like a rough sketch, fasten HARNESS by BINDER Don't stretch. BINDER C W21 Gray Black White Black less than 15mm less than 10mm Put it within this range. Fasten CABLE...
  • Page 84 REPLACEMENT PARTS Model : AO*S24LDC PROCESS Arrangement of lead wires to be connected to the inverter assembly. BINDER Thermistor(Heat exchanger) Thermistor(Outdoor Temp.) EEV Coil Lead Pass the lead wire underneath the piping. 09-20...
  • Page 85 REPLACEMENT PARTS Model : AO*S24LDC PROCESS ATTACHMENT OF INVERTER ASSY E - E PCB side Binder TOP direction Signal Line F - F 4way valve lead 5 leads from PCB Do not let each thermistor lead wires (discharge, Gather lead wires with the binder.
  • Page 86 REPLACEMENT PARTS Model : AO*S24LDC PROCESS Installation of wire to Inverter assy Comp Lead Thermistor (Discharge) Thermistor (Heat exchanger) Thermistor (Outdoor Temp.) EEV Coil Lead 4way valve Coil Lead Motor Lead Motor Lead Comp Lead Lead wire shall be securely fit in...
  • Page 87 REPLACEMENT PARTS Model : AO*S24LDC PROCESS Installation of wire to Inverter assy Motor Lead Motor Lead Comp Lead Motor Lead Lead wire shall be beneath the rib. Lead wire shall be beneath the rib. Each Lead Location valve Coil Lead Compressor lead shall be Thermistor (Outdoor Temp.)

  • Page 88: Installation Manual

    R410A WALL MOUNTED type INVERTER 10 . INSTALLATION MANUAL...
  • Page 91 1116, Suenaga, Takatsu-ku, Kawasaki 213-8502, Japan FEB 2006 Printed in Japan GS20032006...

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