Carrier 42cvur018-703 Service Manual
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Carrier 42cvur018-703 Service Manual

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SERVICE MANUAL

Indoor Unit
<High Wall, Heat Pump Type>
42CVUR018-703
Outdoor Unit
<Heat Pump Type>
38CVUR018-703
R410A
FILE NO. SVM-12052
SPLIT TYPE
September, 2012

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Summary of Contents for Carrier 42cvur018-703

  • Page 1: Service Manual

    FILE NO. SVM-12052 SERVICE MANUAL SPLIT TYPE Indoor Unit <High Wall, Heat Pump Type> 42CVUR018-703 Outdoor Unit <Heat Pump Type> 38CVUR018-703 R410A September, 2012...

  • Page 2: Table Of Contents

    CONTENTS FILE NO. SVM-12052 1. SAFETY PRECAUTIONS ................2 2. SPECIFICATIONS ..................5 3. REFRIGERANT R410A ................7 4. CONSTRUCTION VIEWS ................ 15 5. WIRING DIAGRAM .................. 17 6. SPECIFICATIONS OF ELECTRICAL PARTS ......... 18 7. REFRIGERANT CYCLE DIAGRAM ............19 8.

  • Page 3: Safety Precautions

    1. SAFETY PRECAUTIONS FILE NO. SVM-12052 • Before insallation, please read these precautions for safety carefully. • Be sure to follow the precautions provided here to avoid safety risks. The symbols and their meanings are shown below. WARNING : It indicates that incorrect use of this unit may cause severe injury or death. CAUTION : It indicates that incorrect use of this unit may cause personal injury (*1), or property damage (*2).
  • Page 4 FILE NO. SVM-12052 WARNING • Never modify this unit by removing any of the safety guards or bypassing any of the safety interlock switches. • Installation work must be requested from the supplying retail dealership or professional vendors. Self-installation may cause water leakage, electrical shock, or fire as a result of improper installation. •...
  • Page 5 FILE NO. SVM-12052 CAUTION • Exposure of unit to waer or other moisture before installation could result in electric shock. Do not store it in a wet basement or expose to rain or water. • After unpacking the unit, examine it carefully for possible damage. •...

  • Page 6: Specifications

    2. SPECIFICATIONS FILE NO. SVM-12052 2-1 Specifications 42CVUR018-703 Unit model Indoor 38CVUR018-703 Outdoor Cooling capacity (kW) 1.1-6.0 Cooling capacity range (kW) 1Ph/50Hz/220-240V Power supply 1Ph/60Hz/220-230V Cooling Electric Indoor Operation mode 0.30-0.28 characteristic Running current Power consumption Power factor Cooling Outdoor Operation mode 6.80-6.23...

  • Page 7: Operation Characteristic Curve

    FILE NO. SVM-12052 2-2. Operation Characteristic Curve <Cooling> 12.00 11.00 10.00 9.00 8.00 7.00 6.00 5.00 4.00 3.00 2.00 1.00 0.00 100 110 120 Compressor Speed (RPS) 2-3. Capacity Variation Ratio According to Temperature <Cooling> Condition Indoor: DB27°C/WB19°C Indoor Air-Flow Volume: High Pipe Length: 7.5m Capacity Ratio: 100% = 5.0kW 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46...

  • Page 8: Refrigerant R410A

    FILE NO. SVM-12052 3. REFRIGERANT R410A This air conditioner adopts the new refrigerant HFC 6. When an air conditioning system charged with a (R410A) which does not damage the ozone layer. large volume of refrigerant is installed in a small room, it is necessary to exercise care so that, The working pressure of the new refrigerant R410A even when refrigerant leaks, its concentration...
  • Page 9 FILE NO. SVM-12052 Table 3-2-1 Thicknesses of annealed copper pipes Thickness (mm) Nominal diameter Outer diameter (mm) R410A 6.35 0.80 0.80 9.52 0.80 0.80 12.70 0.80 0.80 15.88 1.00 1.00 2. Joints For copper pipes, flare joints or socket joints are used. Prior to use, be sure to remove all contaminants. a) Flare Joints Flare joints used to connect the copper pipes cannot be used for pipings whose outer diameter exceeds 20 mm.
  • Page 10 FILE NO. SVM-12052 d) Flare Processing Make certain that a clamp bar and copper pipe have been cleaned. ØD By means of the clamp bar, perform the flare processing correctly. Use either a flare tool for R410A or conven- tional flare tool. Flare processing dimensions differ according to the type of flare tool.
  • Page 11 FILE NO. SVM-12052 Table 3-2-6 Flare and flare nut dimensions for R22 Dimension (mm) Nominal Outer diameter Thickness Flare nut width diameter (mm) (mm) (mm) 6.35 9.52 13.0 13.5 12.70 16.0 16.2 12.9 15.88 19.0 19.7 16.0 19.05 23.3 24.0 19.2 Fig.
  • Page 12 FILE NO. SVM-12052 3-3. Tools 3-3-1. Required Tools The service port diameter of packed valve of the outdoor unit in the air-water heat pump using R410A is changed to prevent mixing of other refrigerant. To reinforce the pressure-resisting strength, flare processing dimensions and opposite side dimension of flare nut (For Ø12.7 copper pipe) of the refrigerant piping are lengthened.

  • Page 13: Recharging Of Refrigerant

    FILE NO. SVM-12052 3-4. Recharging of Refrigerant When it is necessary to recharge refrigerant, charge the specified amount of new refrigerant according to the following steps. Recover the refrigerant, and check no refrigerant remains in the equipment. When the compound gauge’s pointer has indicated –0.1 MPa (–76 cmHg), place the handle Low in the fully closed position, and turn off the vacuum pump’s power switch.

  • Page 14: Brazing Of Pipes

    FILE NO. SVM-12052 1. Be sure to make setting so that liquid can be charged. 2. When using a cylinder equipped with a siphon, liquid can be charged without turning it upside down. It is necessary for charging refrigerant under condition of liquid because R410A is mixed type of refrigerant. Accordingly, when charging refrigerant from the refrigerant cylinder to the equipment, charge it turning the cylinder upside down if cylinder is not equipped with siphon.
  • Page 15 FILE NO. SVM-12052 3-5-3. Brazing 2. Characteristics required for flux • Activated temperature of flux coincides with the As brazing work requires sophisticated techniques, brazing temperature. experiences based upon a theoretical knowledge, it must be performed by a person qualified. •...

  • Page 16: Construction Views

    FILE NO. SVM-12052 4. CONSTRUCTION VIEWS 4-1 Indoor Unit Grille Inlet Heat exchanger Front Panel Air inlet Air filter 1050 Air outlet Knock out system Knock out system Wireless remote controller 17.5 Remote controller holder Drain hose (0.5) Hanger Hanger Connecting pipe (0.39m) Connecting pipe (0.49m) (Flare...
  • Page 17 FILE NO. SVM-12052 2.2 Outdoor Unit Ø6 hole R5.5 Ø6 hole Ø11x14 hole A detail Drawing (Back leg) Ø 11 x 14 Hole Ø 25 Drain outlet B Detail Drawing (Front leg) (For 8 - 10 anchor bolt) Ø Ø FAN-GUARD Ø...

  • Page 18: Wiring Diagram

    FILE NO. SVM-12052 5. WIRING DIAGRAM CN01 CN51 (WHI) CN31 AC Motor (WHI) Fan Motor Heat Exchanger Sensor CN33 CN62 (WHI) (BLU) (TC) Varistor Line Thermo Sensor CN61 Filter (WHI) (TA) Louver Motor CN32 (WHI) CN22 (WHI) DC5V DC12V Color indication YEL:YELLOW BLK:BLACK RED:RED...

  • Page 19: Specifications Of Electrical Parts

    FILE NO. SVM-12052 6. SPECIFICATIONS OF ELECTRICAL PARTS 6-1. Indoor Unit Parts name Type Specifications AFS-220-31-4B AC 220V, 31W Fan motor (for indoor) Room temp. sensor (TA-sensor) ( — ) 10kΩ at 25°C Heat exchanger temp. sensor (TC-sensor) ( — ) 10kΩ...

  • Page 20: Refrigerant Cycle Diagram

    FILE NO. SVM-12052 7. REFRIGERANT CYCLE DIAGRAM 7-1. Refrigerant Cycle Diagram Temp. measurement INDOOR UNIT Indoor heat exchanger Cross flow fan Max. : 20m Min. : 2m Pressure measurement Chargeless : 15m Deoxidized copper pipe Gauge attaching port Outer dia. : 6.35mm Charge : 20g/m Vacuum pump connecting port Thickness : 0.8mm...

  • Page 21: Operation Data

    FILE NO. SVM-12052 7-2. Operation Data <Cooling> Tempeature Heat exchanger Standard Compressor Indoor Outdoor condition(°C) pipe temp. pressure revolution fan mode fan mode P (Mpa) (rps) Indoor Outdoor T1 (°C) 27/19 35/- 0.9 to 1.1 9 to 12 High High NOTES : 1.

  • Page 22: Control Block Diagram

    FILE NO. SVM-12052 8. CONTROL BLOCK DIAGRAM 8-1. Indoor Unit Indoor Unit Control Unit M.C.U. Heat Exchanger Sensor (Tc) Louver Functions Motor • Cold draft preventing Function Room Temperature Sensor (Ta) • 3-minute Delay at Restart Louver Motor for Compressor Drive Control Infrared Rays Signal Receiver and Indication...
  • Page 23 FILE NO. SVM-12052 8-2. Outdoor Unit (Inverter Assembly) – –...

  • Page 24: Operation Description

    FILE NO. SVM-12052 9. OPERATION DESCRIPTION 9-1. Outline of Air Conditioner Control • Detection of inverter input current and current release operation This air conditioner is a capacity-variable type air • Over-current detection and prevention operation conditioner. Its system can control the speed of to IGBT module (Compressor stop function) compressor motor according to load.
  • Page 25 FILE NO. SVM-12052 9-2. Operation Description 1. Basic operation ......................25 1. Operation control ....................25 2. Cooling operation ....................26 3. AUTO operation ..................... 26 4. DRY operation ......................26 2. Indoor fan motor control ..................... 27 3. Outdoor fan motor control ................... 28 4.

  • Page 26: Operation Description

    FILE NO. SVM-12052 9-2. Operation Description Item Operation flow and applicable data, etc. Description 1. Basic 1. Operation control operation Receiving the user’s operation condition setup, the operation statuses of indoor/outdoor units are controlled. 1) The operation conditions are selected by the remote controller as shown in the below. 2) A signal is sent by ON button of the remote controller.

  • Page 27: Cooling Operation

    FILE NO. SVM-12052 Item Operation flow and applicable data, etc. Description 1. Basic 2. Cooling operation operation The operations are performed in the following parts by controls according to cooling conditions. 1) Receiving the operation ON signal of the remote controller, the cooling operation signal starts being transferred form the indoor controller to the outdoor unit.

  • Page 28: Indoor Fan Motor Control

    *5 : Fan speed = (M + –L) x 1/4 + L +1.0 +0.5 (Linear approximation L(W6) from M+ and L) (Table 1) Indoor fan air flow rate Fan speed 42CVUR018-703 level COOL Fan speed Air flow rate (rpm) (m3/h) 1000...

  • Page 29: Outdoor Fan Motor Control

    FILE NO. SVM-12052 Item Operation flow and applicable data, etc. Description The blowing air volume at the outdoor unit side is controlled. 1) The operation command sent 3. Outdoor fan from the remote controller is motor control Receiving the operation command from the controller of processed by the indoor unit indoor unit, the controller of outdoor unit controls fan speed.

  • Page 30: Capacity Control

    Current decrease which does not exceed the Capacity control continues. specified value. Cooling current release value Outdoor temp. 42CVUR018-703 4.88A 45°C 6.15A 40°C 44°C 16°C 39°C 8.02A 11°C...

  • Page 31: Release Protective Control By Temperature Of Indoor Heat Exchanger

    FILE NO. SVM-12052 Item Operation flow and applicable data, etc. Description 6. Release protective <In cooling/dry operation> 1) When temperature of the indoor control by tempera- heat exchanger drops below 5°C, (Prevent-freezing control for indoor heat exchanger) ture of indoor heat the compressor speed is In cooling/dry operation, the sensor of indoor heat exchanger...

  • Page 32: Eco Operation

    FILE NO. SVM-12052 Item Operation flow and applicable data, etc. Description 8. ECO When pressing [ECO] button on the remote controller, a <Cooling operation> operation Economic operation is performed. 1) The control target temperature <Cooling operation> increase 0.5ºC per hour up to 2ºC This function operates the air conditioner with the starting from the set temperature difference between the set and the room temperature as...

  • Page 33: Discharge Temperature Control

    FILE NO. SVM-12052 Item Operation flow and applicable data, etc. Description 10. Discharge temperature control 1. Purpose This function detects error on the Td value Control operation refrigerating cycle or error on the com- Judges as an error and stops the compressor. pressor, and performs protective control.

  • Page 34: Remote-A Or B Selection

    FILE NO. SVM-12052 Item Operation flow and applicable data, etc. Description Setting the remote controller 12. Romote-A or B 1. Purpose selection To separate using of remote control for each indoor unit This operation is to operate only one indoor unit using one remote controller. in case of 2 air conditioners are installed nearly.

  • Page 35: Auto Restart Function

    FILE NO. SVM-12052 9-3. Auto Restart Function This indoor unit is equipped with an automatic restarting function which allows the unit to restart operating with the set operating conditions in the event of a power supply being accidentally shut down. The operation will resume without warning three minutes after power is restored.

  • Page 36: How To Cancel The Auto Restart Function

    FILE NO. SVM-12052 9-3-2. How to Cancel the Auto Restart Function To cancel auto restart function, proceed as follows : Repeat the setting procedure : the unit receives the signal and beeps three times. The unit will be required to be turned on with the remote controller after the main power supply is turned off. •...

  • Page 37: Remote Control

    FILE NO. SVM-12052 9-4. Remote control 9-4-1. Remote control and its functions Infrared signal emitter Start/Stop button ( Mode select button ( Temperature button ( Fan speed button ( Swing louver button ( Set louver button ( On timer button ( Off timer button ( ECO Sleep button ( Setup button (...
  • Page 38 FILE NO. SVM-12052 3. DRY OPERATION For dehumidification a moderate cooling perfermance is controlled automatically. 1. Press : Select Dry 2. Press : Set the desired temperature. 4. Hi-POWER OPERATION To automatically control room temperature and airflow for faster cooling operation (except in DRY and FAN ONLY mode) Press : Start and stop the operation.
  • Page 39 FILE NO. SVM-12052 8. PRESET OPERATION Set your preferred operation for future use. The setting will be memorized by the unit for future operation (except air flow direction). 1. Select your preferred operation. 2. Press and hold for 3 seconds to memorize the setting. The mark displays.

  • Page 40: Name And Functions Of Indications On Remote Controller

    FILE NO. SVM-12052 9-4-3. Name and Functions of Indications on Remote Controller [Display] All indications, except for the clock time indicator, are displayed by pressing the button. Transmission mark Hi-POWER indicator This transmission mark indicates when the Indicates when the Hi-POWER operation starts. remote controller transmits signals to the indoor Press the Hi-POWER button to start and press it unit.

  • Page 41: Installation Procedure

    FILE NO. SVM-12052 10. INSTALLATION PROCEDURE 10-1. Installation Diagram of Indoor and Outdoor Units For the rear left and left piping Hook Installation plate Wall Insert the cushion between the Hook indoor unit and wall, and tilt the indoor unit for better operation. Do not allow the drain hose to get slack.
  • Page 42 FILE NO. SVM-12052 10-2. Optional Parts, Accessories and Tools 10-2-1. Optional installation parts Part Parts name Q'ty Code Refrigerant piping Liquid side : ∅6.35 mm each Gas side : ∅12.70 mm Pipe insulating material (polyethylene foam, 8 mm thick) Putty, PVC tapes each <Fixing bolt arrangement of outdoor unit>...
  • Page 43 FILE NO. SVM-12052 10-2-2. Accessory and installation parts Part Part Part Part name (Q’ty) Part name (Q’ty) Part name (Q’ty) Flat head wood screw ∅3.1 x 16 s x 2 Installation plate x 1 Remote control holder x 1 Flat head wood screw ∅3.1 x 25 s x 1 Nano Silver Ginseng filter x 2 Wireless remote control x 1...
  • Page 44 FILE NO. SVM-12052 10-2-3. Installation/Servicing Tools Changes in the product and components In the case of an air conditioner using R410A, in order to prevent any other refrigerant from being charged accidentally, the service port diameter of the outdoor unit control valve (3 way valve) has been changed. (1/2 UNF 20 threads per inch) •...

  • Page 45: Indoor Unit

    FILE NO. SVM-12052 10-3. Indoor Unit 10-3-2. Cutting a Hole and Mounting Installation Plate 10-3-1. Installation Place • A place which provides the spaces around the <Cutting a hole> indoor unit as shown in the diagram. When install the refrigerant pipes from the rear. •...
  • Page 46 FILE NO. SVM-12052 10-3-3. Electrical Work <When the installation plate is directly 1. The supply voltage must be the same as the mounted on the wall> rated voltage of the air conditioner. 1. Securely fit the installation plate onto the wall by 2.
  • Page 47 FILE NO. SVM-12052 10-3-5. How to Connect Remote Controller CAUTION CAUTION for Wire Operation • Be sure to refer to the wiring system diagram labeled inside the front panel. Indoor unit • Check local electrical cords and also any specific wiring instructions or limitations.

  • Page 48: Piping And Drain Hose Installation

    FILE NO. SVM-12052 70 mm Control wire Control wire * Wire size 28-22 AWG (0.08~0.32 mm Outer diameter not over 4.7 mm, Screw (∅3.1 x 16L) for control wire length 30 m. or less. Hole for hang hang remote controller remote controller 5 mm Control wire out position...
  • Page 49 FILE NO. SVM-12052 <How to attach the drain cap> Rear right 1. Insert hexagon wrench (4 mm) in a center head. Rear left Bottom left Left Bottom right Right 4 mm 1. Die-cutting front panel slit Fig. 10-3-15 Cut out the slit on the left or right side of the front panal for the left or right connection and the slit on th bonttom left or right side of the front panel for the botto 2.
  • Page 50 FILE NO. SVM-12052 <In case of bottom right or bottom left piping> CAUTION • After scribing slits of the front panel with a knife • Bind the auxiliary pipes (two) and connecting or a making-off pin, cut them with a pair of cable with facing tape tightly.
  • Page 51 FILE NO. SVM-12052 2. Put water in the drain pan and make sure that Information the water is drained out of doors. The lower part of indoor unit may float, due to the 3. When connecting extension drain hose, insulate condition of piping and you cannot fix it to the the connection part of extension drain hose with installation plate.
  • Page 52 FILE NO. SVM-12052 10-4. Outdoor Unit 10-4-2. Refrigerant piping connection 10-4-1. Installation place <Flaring> • A place which provides the spaces around the 1. Cut the pipe with a pipe cutter. outdoor unit as shown in the left diagram. • A place which can bear the weight of the outdoor unit and does not allow an increase in noise level Roughness Warp...
  • Page 53 FILE NO. SVM-12052 <Using a vacuum pump> CAUTION Be sure to use a vacuum pump with counter-flow • Do not apply excess torque. prevention function so that inside oil of the pump does • Otherwise, the nut may crack depending on the not flow backward into pipes of the air conditioner conditions.

  • Page 54: Electrical Work

    Earth line CAUTION Connecting cable Power cord Fig. 10-4-9 Service Port Cap Model 42CVUR018-703 Valve Rod Cap 220-240V Single phase, 50Hz Power source 220-230V Single phase, 60Hz Fig. 10-4-8 Maximum running current 9.2A Plug socket & fuse rating...
  • Page 55 FILE NO. SVM-12052 10-5. Others NOTE : 1. Repeat above step to reset Remote Control to be A. 10-5-1. Gas leak test 2. Remote Control A has not "A" display. 3. Default setting of Remote Control from Check places for indoor unit (Flarenut factory is A.

  • Page 56: How To Diagnose The Trouble

    FILE NO. SVM-12052 11. HOW TO DIAGNOSE THE TROUBLE The pulse motor circuits are mounted to both indoor and outdoor units. Therefore, diagnose troubles according to the trouble diagnosis procedure as described below. (Refer to the check points in servicing written on the wiring diagrams attached to the indoor/outdoor units.) Table 11-1 Troubleshooting Procedure First Confirmation...
  • Page 57 FILE NO. SVM-12052 CAUTION A high voltage (equivalent to the supply voltage) is also energized to ground through the sensors, PMV and other low-voltage circuits. The sensor leads and other wires are covered with insulated tubes for protection. Nevertheless, care must be taken to ensure that these wires are not pinched. Take sufficient care to avoid directly touching any of the circuit parts without first turning off the power.

  • Page 58: First Confirmation

    FILE NO. SVM-12052 11-1. First Confirmation 11-1-1. Confirmation of Power Supply Confirm that the power breaker operates (ON) normally. 11-1-2. Confirmation of Power Voltage Confirm that power voltage is AC 220–230–240 ± 10%. If power voltage is not in this range, the unit may not operate normally. 11-1-3.

  • Page 59: Primary Judgment

    FILE NO. SVM-12052 11-2. Primary Judgment To diagnose the troubles, use the following methods. 1) Judgment by flashing LED of indoor unit 2) Self-diagnosis by service check remote controller 3) Judgment of trouble by every symptom Firstly use the method 1) for diagnosis. Then, use the method 2) or 3) to diagnose the details of troubles. 11-3.
  • Page 60 FILE NO. SVM-12052 11-4. Self-Diagnosis by Remote Controller (Check Code) 1. If the lamps are indicated as shown B to E in Table 11-3-1, execute the self-diagnosis by the remote controller. 2. When the remote controller is set to the service mode, the indoor controller diagnoses the operation condi- tion and indicates the information of the self-diagnosis on the display of the remote controller with the check codes.
  • Page 61 FILE NO. SVM-12052 Table 11-4-1 Block level Diagnosis function Judgement and action Check Check Unit Block Symptom Condition code code status Indoor The indoor thermo sensor (TA) is Operation The lamp on the 1. Check the indoor thermo sensor (TA). P.C.

  • Page 62: Judgment Of Trouble By Every Symptom

    FILE NO. SVM-12052 11-5. Judgment of Trouble by Every Symptom 11-5-1. Indoor Unit (Including Remote Controller) (1) Power is not turned on (Does not operate entirely) <Primary check> 1. Is the supply voltage normal? 2. Is the normal voltage provided to the outdoor unit? 3.
  • Page 63 FILE NO. SVM-12052 (3) Only the indoor motor fan does not operate <Primary check> 1. Is it possible to detect the power supply voltage (AC220–240V) between on the terminal block? 2. Does the indoor fan motor operate in cooling operation? (In heating operation, the indoor fan motor does not operate for approximately 10 minutes after it is turned on, to prevent a cold air from blowing in.) Turn off power...
  • Page 64 FILE NO. SVM-12052 (4) Indoor fan motor automatically starts to rotate by turning on power supply [For DC fan motor] <Cause> The IC is built in the indoor fan motor. Therefore the P.C. board is also mounted to inside of the motor. If the P.C.
  • Page 65 FILE NO. SVM-12052 (5) Troubleshooting for remote controller <Primary check> Check that A or B selected on the main unit is matched with A or B selected on the remote controller. The unit does not beep at all. Push the [ ] button.
  • Page 66 FILE NO. SVM-12052 11-5-2. Wiring Failure (Interconnecting and Serial Signal Wire) (1) Outdoor unit does not operate 1) Is the voltage between of the indoor terminal block varied? Confirm that transmission from indoor unit to outdoor unit is correctly performed based upon the following diagram.
  • Page 67 FILE NO. SVM-12052 11-6. Check Code 18 and 1E <Check procedure> Gas leakage, disconnection of TS/TC sensors Discharge temp. error, gas leakage (Check code 02, 1C) (Check code 03, 1E) Valve drive check Is coil of the pulse motor valve Set it correctly.

  • Page 68: How To Diagnose Trouble In Outdoor Unit

    FILE NO. SVM-12052 11-7. How to Diagnose Trouble in Outdoor Unit 11-7-1. Summarized Inner Diagnosis of Inverter Assembly Table 11-7-1 Diagnosis/Process flowchart Item Contents Summary Preparation Turn “OFF” the power supply breaker, and remove 3P Remove connector connector which connects of compressor.

  • Page 69: How To Check Simply The Main Parts

    FILE NO. SVM-12052 Diagnosis/Process flowchart Item Contents Summary Check Check winding resistance between phases of compres- sor, and resistance between outdoor frames by using a tester. → OK if 10MΩ or more • Is not grounded. Replace control board assembly. ...
  • Page 70 FILE NO. SVM-12052 (3) Check procedures Table 11-8-1 Procedure Check points Causes Turn off the power supply breaker Check whether or not the fuse (F01) Impulse voltage was applied or the and remove the P.C. board is blown. indoor fan motor short-circuited. assembly from electronic parts base.
  • Page 71 FILE NO. SVM-12052 11-8-2. P .C . Board Layout + 5V + 12V +12V [1] Sensor characteristic table TD : Discharge temp. sensor TA : Room temp. sensor TC : Heat exchanger temp. sensor TO : Outdoor temp. sensor TA, TC, TO, TS TS : Suction temp.
  • Page 72 FILE NO. SVM-12052 11-8-3. Indoor Unit (Other Parts) Part name Checking procedure Room temp. (TA) sensor Disconnect the connector and measure the resistance value with tester. Heat exchanger (TC) sensor (Normal temp.) Temperature 10°C 20°C 25°C 30°C 40°C Sensor TA, TC (kΩ) 20.7 12.6 10.0...
  • Page 73 FILE NO. SVM-12052 11-8-5. Checking Method for Each Part Part name Checking procedure Electrolytic capacitor 1. Turn OFF the power supply breaker. (For boost, smoothing) 2. Discharge all three capacitors completely. 3. Check that safety valve at the bottom of capacitor is not broken. 4.

  • Page 74: How To Simply Judge Whether Outdoor Fan Motor Is Good Or Bad

    FILE NO. SVM-12052 11-9. How to Simply Judge Whether Outdoor Fan Motor is Good or Bad 1. Symptom • Outdoor fan motor does not rotate. • Outdoor fan motor stops within several 10 seconds though it started rotating. • Outdoor fan motor rotates or does not rotate according to the position where the fan stopped, etc. Remote controller check code “02 : Outdoor block, 1A : Outdoor fan drive system error”...

  • Page 75: How To Replace The Main Parts

    FILE NO. SVM-12052 12. HOW TO REPLACE THE MAIN PARTS WARNING • Since high voltages pass through the electrical parts, turn off the power without fail before proceeding with the repairs. Electric shocks may occur if the power plug is not disconnected. •...
  • Page 76 FILE NO. SVM-12052 Part name Procedures Remarks Front panel 4) Press "PUSH" part under the front panel  and remove hooks of the front panel from the installation plate. Installation plate Front panel Press 5) Remove the front panel fixing screws. (4 pcs.) 6) Take off four hooks of panel from rear side.
  • Page 77 FILE NO. SVM-12052 Part name Procedures Remarks Electric parts ‚ 1) Remove screw of earth lead attached to the box assembly end plate of the evaporator. 2) Remove the lead wire cover, and remove connector for the fan motor and connec- tor for the louver motor from the electric parts box assembly.
  • Page 78 FILE NO. SVM-12052 Part name Procedures Remarks Horizontal louver 1) Remove shaft of the horizontal louver from the back body. (First remove the left shaft, and then remove other shafts while sliding the horizontal louver leftward.) Evaporator 1) Follow to the procedure in the item (Heat exchanger) 2) Remove the pipe holder from the rear side of the main unit.
  • Page 79 FILE NO. SVM-12052 Part name Procedures Evaporator 4) Remove three fixing screw at the right (Heat exchanger) side of the heat exchanger, and separate the heat exchanger from the back body. (Figure 4, 5) One screw (Figure 4) One screw (Figure 5) Bearing 1) Follow to the procedure in the item...
  • Page 80 FILE NO. SVM-12052 Part name Procedures Remarks Fan motor 1) Follow to the procedure till item „ 2) Loosen the set screw of the cross flow fan. 3) Remove two fixing screws of the motor cover and them remove the motor cover. 4) Remove two more fixing screws of the motor band and remove the motor band.
  • Page 81 FILE NO. SVM-12052 Part name Procedures Remarks Cross flow fan <Caution at reassembling> 1) To incorporate the fan motor incorporate the motor into the position in the following figure, and then install the fan motor. • Install the cross flow fan so that the right end of the 1st joint from the right of the cross flow fan is set keeping 5.0 mm from closed wall of the main unit.
  • Page 82 FILE NO. SVM-12052 12-2. Outdoor Unit Part name Procedure Remarks  Common 1. Detachment procedure NOTE Upper cabinet Wear gloves for this job. Otherwise, you may injure your • hands on the parts, etc. Waterproof cover 1) Stop operation of the air conditioner, •...
  • Page 83 FILE NO. SVM-12052 Part name Procedure Remarks Front cabinet 1. Detachment ‚ 1) Perform step 1 in  2) Remove the fixing screws (ST1TØ4 × 10L 2 pcs.) used to secure the front cabinet and inverter cover, the screws (ST1TØ4 ×...
  • Page 84 FILE NO. SVM-12052 Part name Procedure Remarks Inverter 1) Perform work of item 1 in  ƒ Inverter cover assembly 2) Remove screw (ST1TØ4 × 10L 2 pcs.) of the upper part of the front cabinet. P.C board • If removing the inverter cover in this (Soldered surface) condition, P .C.
  • Page 85 FILE NO. SVM-12052 Part name Procedure Remarks Control board 1. Disconnect the leads and connectors connected to „ assembly the other parts from the control board assembly. 1) Leads • 3 leads (black, white, orange) connected to CN603 terminal block. CN601 •...
  • Page 86 FILE NO. SVM-12052 Part name Procedure Remarks Side cabinet 1. Side cabinet (right) … 1) Perform step 1 in ‚ and all the steps in ƒ 2) Remove the fixing screw (ST1TØ4 × 10L 4 pcs.) used for securing the side cabinet to the bottom plate and valve fixing panel.
  • Page 87 FILE NO. SVM-12052 Part name Procedure Remarks Compressor 1) Perform work of item 1 of  ‚ ƒ „ ‡ … 2) Extract refrigerant gas. 3) Remove the partition board. (ST1TØ4 × 10L 3 pcs.) 4) Remove the sound-insulation material. 5) Remove terminal cover of the compressor, Compressor and disconnect lead wire of the compressor...
  • Page 88 FILE NO. SVM-12052 Part name Procedure Remarks ‰ Electronic 1. Detachment expansion ‚ ƒ 1) Perform step 1 in , all the steps in and 1 valve coil … Coil 2) Remove the coil by pulling it up from the anti-turn electronic control valve body.
  • Page 89 FILE NO. SVM-12052 Part name Procedure Remarks TS sensor (Suction pipe temperature sensor) • Attachment Install the senser onto the straight pipe part of the suction Arrow D pipe. Be careful for the lead direction of the sensor. TD sensor (Discharge pipe temperature sensor) •...

  • Page 90: Exploded Views And Parts List

    FILE NO. SVM-12052 13. EXPLODED VIEWS AND PARTS LIST 13-1. Indoor Unit Location Part Location Part Description Description 43T00576 FRONT PANEL ASSY 43T39020 BAND, MOTOR, LEFT 43T09484 GRILLE ASSY,SUB 43T39330 MOTOR BAND (RIGHT,UP) ASSY 43T03019 BACK BODY ASSEMBLY 43T39331 MOTOR BAND (RIGHT,DOWN) ASSY 43T80331 FILTER-AIR 43T44030 EVAPORATOR ASSY 43T09040 LOUVER, HORIZONTAL...

  • Page 91: File No. Svm

    FILE NO. SVM-12052 13-2. Indoor Unit (Part-E) Location Part Location Part Description Description 43T50324 SENSOR; HEAT EXCHANGER 43T6V318 PC BOARD ASSY;WRS-LED 43T60331 TERMINAL; 3P 43T69834 PC BOARD ASSY 43T69320 TEMPERATURE SENSOR 43T21434 STEPPING-MOTOR 43T62003 CORD CLAMP 43T60386 MOTOR CORD – –...
  • Page 92 FILE NO. SVM-12052 13-3. Outdoor Unit Location Part Location Part Description Description 43T00468 FRONT CABINET 43T00451 RIGHT CABINET ASSEMBLY 43T00459 LEFT CABINET 43T46347 BODY PMV 43T42327 BASE PLATE ASSEMBLY 43T63329 COIL PMV 43T00452 UPPER CABINET 43T58309 REACTOR 43T19332 FAN GUARD 43T20319 PROPELLER FAN 43T19330 PACKED VALVE COVER 43T21375 FAN MOTOR...
  • Page 93 FILE NO. SVM-12052 13-4. P.C. Board Layout (Outdoor) Location Part Location Part Description Description 43T62320 HEATSINK 43T60377 TEMPERATURE SENSOR 43T69944 PC BOARD 43T50304 SENSOR;HEAT EXCHANGER 43T60392 TERMINAL-5P 43T62313 BASE-PLATE-PC 43T60326 FUSE – –...
  • Page 94 TOSHIBA CARRIER (THAILAND) CO.,LTD.

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