Carrier 42NQV050M Service Manual
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Carrier 42NQV050M Service Manual

Split type indoor and outdoor unit
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SERVICE MANUAL

Indoor Unit
<High Wall, Heat Pump Type>
42NQV050M
42NQV060M
Outdoor Unit
<Heat Pump Type>
38NYV050M
38NYV060M
R410A
FILE NO. SVM-08048
SPLIT TYPE
Printed in Japan, Mar., 2008

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Summary of Contents for Carrier 42NQV050M

  • Page 1: Service Manual

    FILE NO. SVM-08048 SERVICE MANUAL SPLIT TYPE Indoor Unit <High Wall, Heat Pump Type> 42NQV050M 42NQV060M Outdoor Unit <Heat Pump Type> 38NYV050M 38NYV060M R410A Printed in Japan, Mar., 2008...

  • Page 2: Table Of Contents

    CONTENTS 1. SAFETY PRECAUTIONS ................2 2. SPECIFICATIONS ..................4 3. REFRIGERANT R410A ................6 4. CONSTRUCTION VIEWS ................ 14 5. WIRING DIAGRAM .................. 16 6. SPECIFICATIONS OF ELECTRICAL PARTS ......... 17 7. REFRIGERANT CYCLE DIAGRAM ............18 8. CONTROL BLOCK DIAGRAM ..............21 9.

  • Page 3: Safety Precautions

    1. SAFETY PRECAUTIONS For general public use Power supply cord of outdoor unit shall be more than 1.5 mm (H07RN-F or 60245IEC66) polychloroprene sheathed flexible cord. • Read this “SAFETY PRECAUTIONS” carefully before servicing. • The precautions described below include the important items regarding safety. Observe them without fail. •...
  • Page 4 • DO NOT INSTALL NEAR CONCENTRATIONS OF COMBUSTIBLE GAS OR GAS VAPORS. FAILURE TO FOLLOW THIS INSTRUCTION CAN RESULT IN FIRE OR EXPLOSION. • TO PREVENT THE INDOOR UNIT FROM OVERHEATING AND CAUSING A FIRE HAZARD, PLACE THE UNIT WELL AWAY (MORE THAN 2 M) FROM HEAT SOURCES SUCH AS RADIATORS, HEAT REGISTORS, FURNACE, STOVES, ETC.

  • Page 5: Specifications

    2. SPECIFICATIONS 2-1. Specifications Unit model Indoor 42NQV050M 42NQV060M 38NYV050M 38NYV060M Outdoor Cooling capacity (kW) 1.1-6.0 1.2-6.7 Cooling capacity range (kW) Heating capacity (kW) 0.8-6.3 1.0-7.5 Heating capacity range (kW) 1Ph/50Hz/220-240V Power supply Electric Indoor Operation mode Cooling Heating Cooling...

  • Page 6: Operation Characteristic Curve

    Indoor Air-Flow Volume: High Pipe Length: 7.5m Pipe Length: 7.5m Capacity Ratio: 100%= Capacity Ratio: 100%= 5.0kW (42NQV050M) 5.8kW (42NQV050M) 6.0kW (42NQV060M) 7.0kW (42NQV060M) 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 Outdoor Temperature ( Outdoor Temperature ( –...

  • Page 7: Refrigerant R410A

    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 is 1.6 times higher than conventional refrigerant...
  • Page 8 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 9 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 10 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. 3-2-2 Relations between flare nut and flare seal surface 2.
  • Page 11 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 12: Recharging Of Refrigerant

    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 13 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 14 2. Characteristics required for flux 3-5-3. Brazing • 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. • Due to a wide effective temperature range, flux is hard to carbonize.

  • Page 15: Construction Views

    4.CONSTRUCTION VIEWS 4-1. Indoor Unit 42NQV050M 42NQV060M -14-...
  • Page 16 4-2. Outdoor Unit A leg part dia.11-14U-shape hole (for dia.8-10 anchor bolt) 8-dia.7 hole (for fixing outdoor unit) dia.11x14 long hole B leg part (for dia.8-10 anchor bolt) Packed valve 69.5 147 cover dia.436 Fan guard Connecting pipe port (Pipe dia.6.35) Charging port 4-dia.4.5 embossment Connecting pipe port...

  • Page 17: Wiring Diagram

    5. WIRING DIAGRAM 5-1. 42NQV050M / 38NYV050M 42NQV060M / 38NYV060M COMPRESSOR Q200 205 IGBT R221 R220 R219 (SUCTION PIPE AC250V TEMP. SENSOR) CN602 POWER RELAY (OUTDOOR TEMP. SENSOR) CN601 (DISCHARGE PIPE RELAY TEMP. SENSOR) CN600 (CONDENSER PIPE TEMP. SENSOR) COIL...

  • Page 18: Specifications Of Electrical Parts

    6. SPECIFICATIONS OF ELECTRICAL PARTS 6-1. Indoor Unit Parts name Type Specifications Fan motor 42NQV050M ICF-340-30-2 DC-340V,30W (for indoor) 42NQV060M ( − ) Room temp. sensor (TA-sensor) Ω at 25°C Heat exchanger temp. sensor (TC-sensor) − 10kΩ at 25°C MP24Z3T...

  • Page 19: Refrigerant Cycle Diagram

    7. REFRIGERANT CYCLE DIAGRAM 7-1. Refrigerant Cycle Diagram 42NQV050M / 38NYV050M Temp. measurement INDOOR UNIT Indoor heat exchanger Cross flow fan Max. : 20m Min. : 2m Pressure measurement Chargeless : 15m Deoxidized copper pipe Gauge attaching port Charge : 20g/m Outer dia.
  • Page 20 42NQV060M / 38NYV060M Temp. measurement INDOOR UNIT Indoor heat exchanger Cross flow fan Max. : 20m Min. : 2m Pressure measurement Chargeless : 15m Deoxidized copper pipe Gauge attaching port Charge : 20g/m Outer dia. : 6.35mm Vacuum pump connecting port Thickness : 0.8mm (16 to 20m) Sectional shape...

  • Page 21: Operation Data

    Indoor Outdoor P (MPa) T1 (°C) T2 (°C) (rps) 27/19 35/- 42NQV050M 0.9 to 1.1 11 to 13 40 to 42 High High 42NQV060M 0.9 to 1.1 11 to 13 41 to 43 High High <Heating>...

  • Page 22: Control Block Diagram

    8. CONTROL BLOCK DIAGRAM 8-1. Indoor Unit 42NQV050M, 42NQV060M Indoor Unit Control Unit M.C.U. Louver Functions Motor Heat Exchanger Sensor (Tc) • Cold draft preventing Function Room Temperature Sensor (Ta) Louver Motor • 3-minute Delay at Restart for Compressor Drive Control Infrared Rays Signal Receiver •...
  • Page 23 8-2. Outdoor Unit (Inverter Assembly) – 22 –...

  • Page 24: Operation Description

    9. OPERATION DESCRIPTION • Detection of inverter input current and current 9-1. Outline of Air Conditioner Control release operation This air conditioner is a capacity-variable type air • Over-current detection and prevention operation conditioner, which uses DC motor for the indoor to IGBT module (Compressor stop function) for motor and the outdoor fan motor.
  • Page 25 9-2. Operation Description 1. Basic operation ......................25 1. Operation control ....................25 2. Cooling/Heating operation ..................26 3. AUTO operation ..................... 29 4. DRY operation ......................26 2. Indoor fan motor control ..................... 27 3. Outdoor fan motor control ................... 29 4.

  • Page 26: Basic Operation

    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/Heating Operation

    Item Operation flow and applicable data, etc. Description 1. Basic 2. Cooling/Heating operation operation The operations are performed in the following parts by controls according to cooling/heating conditions. 1) Receiving the operation ON signal of the remote controller, the cooling or heating 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 42NQV050M 42NQV060M level COOL HEAT DRY Fan speed Air flow rate Fan speed Air flow rate...
  • Page 29 Item Operation flow and applicable data, etc. Description 1) When setting the fan speed to L, 2. Indoor fan <In heating operation> L+, M, M+ or H on the remote motor control controller, the operation is per- formed with the constant speed HEAT ON shown in Fig.

  • Page 30: Outdoor Fan Motor Control

    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 31: Capacity Control

    Item Operation flow and applicable data, etc. Description The cooling or heating capacity depending on the load is 1) The difference between set 4. Capacity adjusted. temperature on remote controller control (Ts) and room temperature (Ta) According to difference between the setup value of tempera- is calculated.

  • Page 32: Release Protective Control By Temperature Of Indoor Heat Exchanger

    Item Operation flow and applicable data, etc. Description 1) When temperature of the indoor 6. Release protective <In cooling/dry operation> heat exchanger drops below 5°C, control by tempera- (Prevent-freezing control for indoor heat exchanger) the compressor speed is ture of indoor heat In cooling/dry operation, the sensor of indoor heat reduced.

  • Page 33: Defrost Control (Only In Heating Operation)

    Item Operation flow and applicable data, etc. Description (This function removes frost adhered to the outdoor The necessity of defrost operation is 7. Defrost control heat exchanger.) detected by the outdoor heat exchanger (Only in heating temperature. The conditions to detect the operation) The temperature sensor of the outdoor heat ex- necessity of defrost operation differ in A,...

  • Page 34: Louver Control

    Item Operation flow and applicable data, etc. Description This function controls the air direction of the indoor unit. 8. Louver control 1) Louver • The position is automatically controlled according to the operation position mode (COOL/HEAT). • The set louver position is stored in memory by the microcomputer, and the louver returns to the stored position when the next operation is performed.

  • Page 35: Eco Operation

    * 10 (DRY max - COOL min) /6 x 3 + COOL min * 9 (DRY max - COOL min) /6 x 2 + COOL min * 8 (DRY max - COOL min) /6 x 1 + COOL min 42NQV050M 42NQV060M Cool min DRY max <Heating operation>...

  • Page 36: Temporary Operation

    Item Operation flow and applicable data, etc. Description Pressing [RESET] button starts the temporary opera- 1) When pressing [RESET] button, the 10. Temporary tion of [AUTO] operation. When keeping [RESET] temporary [AUTO] operation starts. operation button pressed for 10 seconds or more, the temporary 2) When keeping [RESET] button pressed [COOL] operation is performed.

  • Page 37: Self-Cleaning Function

    Item Operation flow and applicable data, etc. Description 12. Remote-A or B Setting the remote controller 1. Purpose selection This operation is to operate only one To separate using of remote control for each indoor unit in case of 2 air conditioner are installed nearly. indoor unit using one remote controller.

  • Page 38: Remote-A Or B Selection

    Item Operation flow and applicable data, etc. Description 14. Hi-POWER ([Hi-POWER] button on the remote controller Mode is pressed) When [Hi-POWER] button is pressed while the indoor unit is in Auto, Cooling or Heating operation, Hi- POWER mark is indicated on the display of the remote controller and the unit operates as follows.

  • Page 39: Short Timer

    Item Operation flow and applicable data, etc. Description In the normal condition, after switching one circuit 14. Short Timer Purpose breaker, 3-minute delay time for compressor and To start the unit immediately for the purpose of 1 hour for plasma air purifier are set for the testing, trial...etc, short timer can be used.

  • Page 40: Auto Restart Function

    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. This function is not set to work when shipped from the factory.

  • Page 41: How To Cancel The Auto Restart Function

    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 42: Remote Controller And Its Fuctions

    9-4. Remote Controller and Its Fuctions 9-4-1. Parts Name of Remote Controller • • Infrared signal emitter ‚ Start/Stop button ( ƒ Mode select button ( „ Temperature button ( … Fan speed button ( † Swing louver button ( ‡...
  • Page 43 4. Hi-POWER OPERATION To automatically control room temperature and airflow for faster cooling or heating operation (except in DRY and FAN ONLY mode) Press HI-POWER : Start and stop the operation. 5. ECO OPERATION To automatically control room to save energy (except in DRY and FAN ONLY mode) Press : Start and stop the operation.
  • Page 44 9. AUTO RESTART OPERATION To automatically restart the conditioner after the power failure (Power of the unit must be on.) Setting 1. Press and hold the RESET button on the indoor unit for 3 seconds to set the operation. (3 beep sound and OPERATION lamp blink 5 time/sec for 5 secpmds) •...

  • Page 45: Name And Functions Of Indications On Remote Controller

    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 TIMER and clock time indicator This transmission mark indicates when the The time setting for timer operation or the clock remote controller transmits signals to the indoor time is indicated.

  • Page 46: Installation Procedure

    10. INSTALLATION PROCEDURE 10-1. Installation Diagram of Indoor and Outdoor Units For the rear left and left piping • Installation Hook plate Wall Insert the cushion between the indoor unit and wall, and tilt the indoor unit for better operation. Do not allow the drain hose to get slack.
  • Page 47 Q’ty Refrigerant piping Indoor unit name Liquid side (Outer diameter) Gas side (Outer diameter) 1 ea. 42NQV050M 6.35 mm 12.7 mm 42NQV060M Shield pipe (for extension drain hose) (polyethylene foam, 6 mm thick) Attachment bolt arrangement of outdoor unit 108 mm 125 mm •...
  • Page 48 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 49: Indoor Unit

    10-3. Indoor Unit 10-3-2. Drilling a Hole and Mounting Instal- lation Plate 10-3-1. Installation Place • A place which provides enough spaces around the Drilling a hole indoor unit as shown in the diagram. When install the refrigerant pipes from the rear. •...
  • Page 50 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. Prepare a power source for the exclusive use of screws with the upper and lower catches, that the air conditioner.
  • Page 51 10-3-5. Piping and Drain Hose Installation CAUTION CAUTION • Be sure to refer to the wiring system diagram Piping and drain hose forming labeled inside the front panel. • Since condensation results in machine trouble, • Check local electrical regulations for any make sure to insulate both the connecting pipes specific wiring instructions or limitations.
  • Page 52 How to attach the drain cap In case of bottom right or bottom left piping 1. Insert hexagonal wrench (4 mm). • After making slits on the front panel with a knife or similar tool, cut them out with a pair of nippers or an equivalent tool.
  • Page 53 10-3-7. Drainage CAUTION 1. Run the drain hose at a downward sloped angle. • Bind the auxiliary pipes (two) and connecting cable with facing tape tightly. NOTE : In case of leftward piping and rear-leftward • Hole should be made at a slight downward slant piping, bind the auxiliary pipes (two) only with on the outdoor side.
  • Page 54 10-4. Outdoor Unit Precautions for adding refrigerant • Use a scale having a precision with at least 10 g 10-4-1. Installation Place per index line when adding the refrigerant. • A place which provides enough space around the outdoor unit as shown in the diagram. Do not use a bathroom scale or similar instrument.
  • Page 55 10-4-2. Draining the Water 10-4-3. Refrigerant Piping Connection • Holes are provided on the base plate of the Flaring outdoor unit to ensure that the defrost water produced during heating operations is drained off 1. Cut the pipe with a pipe cutter. efficiently.
  • Page 56 Tightening Connection Use a vacuum pump Align the centers of the connecting pipes and tighten Be sure to use a vacuum pump with counter-flow the flare nut as much as possible with your fingers. prevention function so that oil inside the pump does Then tighten the nut with a wrench and torque not flow back into the air conditioner pipes when the wrench as shown in the figure.
  • Page 57 14 to 18 N•m (1.4 to 1.8 kgf•m) cable Service port Fig. 10-4-12 Hexagonal wrench is required. Model RAS- 42NQV050M 42NQV060M 220 − 230 V ~ 60 Hz Power source 220 – 240 V ~50 Hz Maximum running 13.5 A 12.0 A...
  • Page 58 10-5. Test Operation 10-5-4. Remote Controller A or B Selection Setting 10-5-1. Gas Leak Test When two indoor units are installed in the separated rooms, it • Check the flare nut connections for gas leaks with is not necessary to change the selector switches. a gas leak detector and/or soapy water.

  • Page 59: How To Diagnose The Trouble

    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...
  • Page 60 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.

  • Page 61: First Confirmation

    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 62: Primary Judgment

    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 63 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 64 11-4-2. Caution at Servicing 1. After servicing, press the START/STOP button to return to the normal mode. 2. After servicing by the check code, turn off breaker of the power supply, and turn on breaker of the power supply again so that memory in the microcomputer returns the initial status. However, the check codes are not deleted even if the power supply is turned off because they are stored in the fixed memory.
  • Page 65 Block distinction Operation of diagnosis function Judgment and action Check Check Block Cause of operation conditioner Remarks code code status Outdoor P.C. Inverter over-current All off Displayed when Even if trying operation again, all board protective circuit error is detected. operations stop immediately.

  • Page 66: Judgment Of Trouble By Every Symptom

    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 67 (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.) ( RAS-18, 22 Series ) Turn off power...
  • Page 68 (4) Indoor fan motor automatically starts to rotate by turning on power supply <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. board is soldered imperfectly or the IC is defective, the fan motor may automatically rotate by turning on power supply.
  • Page 69 (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 START/STOP button. Operation lamp on indoor unit is not indicated.
  • Page 70 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 follow- ing diagram.
  • Page 71 11-6. Check Code 18 and 1E <Check procedure> Gas leakage, Discharge temp. error, disconnection of TS/TE gas leakage sensors (Check code 02, 1C) (Check code 03, 1E) Valve drive check Is coil of the pulse motor valve Set it correctly. (P.M.V.) correctly set? Set it correctly.

  • Page 72: How To Diagnose Trouble In Outdoor Unit

    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 Turn “OFF” the power supply Preparation breaker, and remove 3P Remove connector connector which connects of compressor. inverter and compressor. If fuse was blown, be sure to •...

  • Page 73: How To Check Simply The Main Parts

    Diagnosis/Process flowchart Item Contents Summary Check Check winding resistance between phases of compres- sor, and resistance between outdoor frames by using a tester. • Is not grounded. → OK if 10MΩ or more Replace control board assembly.  • Is not short-circuited →...
  • Page 74 (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 75 11-8-2. P.C. Board Layout +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, TE, TS TE : Outdoor heat exchanger temp. sensor TS : Suction temp.
  • Page 76 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 Remote controller...
  • Page 77 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 78: How To Simply Judge Whether Outdoor Fan Motor Is Good Or Bad

    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 tens 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 79: How To Replace The Main Parts

    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. • After the repairs have been completed (after the front panel and cabinet have been installed), perform a test run, and check for smoking, unusual sounds and other abnormalities.
  • Page 80 Part name Procedures Remarks Front panel  4) Remove the front panel fixing screws. (4 pcs.) 5) Take off four hooks of panel from rear side. 4 Screw 2 Screws Three hooks Four hooks <How to assemble the front panel> 1) Press three center positions and two lower center positions of the air outlet, and then hang the hanging hooks (4 pcs.) at the top...
  • Page 81 Part name Procedures Remarks Electric parts 1) Follow the procedure up to 3) in ‚ above. ‚ box assembly 2) Remove screw of earth lead attached to the end plate of the evaporator. 3) 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 82 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 ƒ...
  • Page 83 Part name Procedures Remarks Bearing 1) Follow to the procedure in the item † … 2) Remove the two screws used to secure the bearing base. Two screws screws 3) Remove the bearing base. Bearing base <Caution at assembling> • If the bearing is out from the housing, push it into the specified position and then incorporate it in the main body.
  • Page 84 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 85 Part name Procedures Remarks Cross flow fan ˆ <Caution at reassembling> 1) To incorporate the fan motor, remove the fan motor rubber (at shaft core side), incorporate the motor into the position in the following figure, and then install the fan motor. •...
  • Page 86 12-2. Microcomputer Part name Procedure Remarks  Common procedure 1) Turn the power supply off to stop the Replace terminal block, operation of air-conditioner. microcomputer ass’y and the P .C. board ass’y. 2) Remove the front panel. • Remove the 2 fixing screws. 3) Remove the electrical part base.
  • Page 87 12-3. Outdoor Unit Part name Procedure Remarks  Common 1. Detachment procedure NOTE Wear gloves for this job. Otherwise, you may injure your hands on the parts, etc. 1) Stop operation of the air conditioner, and turn off the main switch of the breaker for air conditioner.
  • Page 88 Part name Procedure Remarks ‚ Front cabinet 1. Detachment  1) Perform step 1 in 2) Remove the fixing screws (ST1TØ4 × 8L 2 pcs.) used to secure the front cabinet and inverter cover, the screws (ST1TØ4 × 8L 3 pcs.) used to secure the front cabinet at the bottom, and the fixing screws (ST1TØ4 ×...
  • Page 89 Part name Procedure Remarks ƒ  Inverter 1) Perform work of item 1 in Inverter cover assembly 2) Remove screw (ST1TØ4 × 8L 2 pcs.) of the P . C. board upper part of the front cabinet. (Soldered surface) • If removing the inverter cover in this condition, P .C.
  • Page 90 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 CN603 • 3 leads (black, white, orange) connected to terminal block. CN601 CN600 CN701 •...
  • Page 91 Part name Procedure Remarks … Side 1. Side cabinet (right) cabinet ‚ 1) Perform step 1 in and all the steps in ƒ 2) Remove the fixing screw (ST1TØ4 × 8L 5 pcs.) used for securing the side cabinet to the bottom plate and valve fixing panel.
  • Page 92 Part name Procedure Remarks ‡  ‚ ƒ „ … Compressor 1) Perform work of item 1 of 2) Extract refrigerant gas. 3) Remove the partition board. (ST1TØ4 × 8L 3 pcs.) 4) Remove the sound-insulation material. 5) Remove terminal cover of the compressor, and disconnect lead wire of the compressor from the terminal.
  • Page 93 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. lock 2.
  • Page 94 Part name Procedure Remarks TE sensor (outdoor heat exchanging temperature sensor) • Attachment With the leads pointing downward and the sensor leads pointing in the direction shown in the figure, install the sensor onto the straight pipe part of the condenser output pipe. Detail C for 38NYV060M Detail C for 38NYV050M TS sensor (Suction pipe temperature sensor)

  • Page 95: Exploded Views And Parts List

    43T20016 FAN, ASSY, CROSS FLOW 43T03014 BODY ASSY, BACK 43T49010 PIPE, SHIELD 43T44030 EVAPORATOR ASSY(42NQV050M) 43T83003 HOLDER, REMOTE CONTROL 43T09043 GRILLE ASSY, SUB CARRIER 43T82008 PLATE, INSTALLATION 43T80019 AIR FILTER 43T19333 HOLDER, SENSOR 43T00054 PANEL ASSY, SERVICE 43T49043 HOLDER, PIPE...
  • Page 96 4 1 3 4 0 1 Location Part Location Part Description Description 43T50308 SENSOR (TC) 43T69738 PC-BOARD ASSY (42NQV050M) 43T60331 T T ERMINAL BLOCK, 3P 43T69739 PC-BOARD ASSY (42NQV060M) 43T69320 SENSOR (TA) 43T21397 LOUVER MOTOR R 43T62003 CLAMPER, CORD 43T60386...
  • Page 97 13-2. Outdoor Unit – 96 –...
  • Page 98 Location Part Location Part Description Description 43047527 TUBE, CAPILLARY, ID 2.0X2000L 43005657 CABI, FRONT (38NYV060M) 43005642 CABINET, UPPER 43005658 CABI, SIDE, REGHT 43046445 VALVE, 4WAY, STF-0213Z (38NYV060M) 43005634 CABINET, SIDE, LEFT 43046444 VALVE, 4WAY, STF-0108Z (38NYV050M) 43191656 GUARD, FAN 43146722 COIL, SOLENOID, STF-01A, J502E1 4301V053 GUARD, FIN 37546848 VALVE, PLUSE, MODULATING 43100346 BASE ASSY, ROHS...
  • Page 99 13-3. P.C. Board Layout (Outdoor) Location Part Location Part Description Description 43050422 SERSOR, TE 43160566 TERMINAL BLOCK, 6P, 20A 43050423 SENSOR, TS 4306V029 PC BOARD ASSY, MCC5009 (38NYV050M) 43050427 SENSOR, TO 4306V030 PC BOARD ASSY, MCC5009 (38NYV060M) 43050430 SENSOR, TD 43160571 FUSE, HOLDER, 15A, 250V 43062228 BASE, PC BOARD 43160590 FUSE...
  • Page 100 FILE NO. SVM-03005 TOSHIBA CARRIER (THAILAND) CO.,LTD. 144/9 MOO 5, BANGKADI INDUSTRIAL PARK, TIVANON ROAD, TAMBOL BANGKADI, AMPHUR MUANG, PATHUMTHANI 12000, THAILAND. – 56 –...

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