Carrier 42UQV050M Service Manual
  1. Manuals
  2. Brands
  3. Carrier Manuals
  4. Air Conditioner
  5. 42UQV050M Series
  6. Service manual

Carrier 42UQV050M Service Manual

Split type
Hide thumbs Also See for 42UQV050M:
Table of Contents

Advertisement

Quick Links

See also: Installation Manual

SERVICE MANUAL

Indoor Unit
<High Wall, Heat Pump Type>
42UQV050M
42UQV060M
Outdoor Unit
<Heat Pump Type>
38UYV050M
38UYV060M
R410A
FILE NO. SVM-13035
SPLIT TYPE
March, 2013

Advertisement

Table of Contents
loading
Need help?

Need help?

Do you have a question about the 42UQV050M and is the answer not in the manual?

Questions and answers

Related Manuals for Carrier 42UQV050M

Summary of Contents for Carrier 42UQV050M

  • Page 1: Service Manual

    FILE NO. SVM-13035 SERVICE MANUAL SPLIT TYPE Indoor Unit <High Wall, Heat Pump Type> 42UQV050M 42UQV060M Outdoor Unit <Heat Pump Type> 38UYV050M 38UYV060M R410A March, 2013...

  • Page 2: Table Of Contents

    CONTENTS FILE NO. SVM-13035 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

    FILE NO. SVM-13035 1. SAFETY PRECAUTIONS The manufacturer shall not assume any liability for the damage caused by not observing the description of this manual. Be sure to read this installation manual carefully before installing. Recommend to the owner to perform maintenance periodically when using over long periods of time. Be sure to follow the precautions provided here to avoid safety risks.
  • Page 4 FILE NO. SVM-13035 WARNING • 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. • Specified tools and pipe parts for model R410A are required, and installation work must be done in accordance with the manual.
  • Page 5 FILE NO. SVM-13035 CAUTION • Please read this installation manual carefbefore installing the unit. It contains further important instructions for proper installation. • Exposure of unit to water or other moisture before installation could result in electric shock. Do not store it in a wet basement or expose to rain or water.

  • Page 6: Specifications

    FILE NO. SVM-13035 2. SPECIFICATIONS 2-1. Specifications 42UQV050M 42UQV060M Unit model Indoor 38UYV050M 38UYV060M 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, 1Ph/60Hz/220-230V Power supply Electric Indoor Operation mode...

  • Page 7: Operation Characteristic Curve

    Indoor Air-Flow Volume: High Pipe Length: 7.5m Pipe Length: 7.5m Capacity Ratio: 100%= Capacity Ratio: 100%= 5.0kW (42UQV050M) 5.8kW (42UQV050M) 6.0kW (42UQV060M) 7.0kW (42UQV060M) 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 Outdoor Temperature ( Outdoor Temperature ( –...

  • Page 8: Refrigerant R410A

    FILE NO. SVM-13035 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-13035 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-13035 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-13035 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-13035 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-13035 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-13035 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-13035 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-13035 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-13035 4.2 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-13035 5. WIRING DIAGRAM 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 4WAY VALVE Power Supply (From Main Line) Heat Exchanger...

  • Page 19: Specifications Of Electrical Parts

    FILE NO. SVM-13035 6. SPECIFICATIONS OF ELECTRICAL PARTS 6-1. Indoor Unit Parts name Type Specifications 42UQV050M MF-340-30-3 DC-340V, 30W Fan motor (for indoor) 42UQV060M ICF-340-30-2B DC-340V, 30W ( − ) Ω Room temp. sensor (TA-sensor) at 25°C − Heat exchanger temp. sensor (TC-sensor) 10kΩ...

  • Page 20: Refrigerant Cycle Diagram

    FILE NO. SVM-13035 7. REFRIGERANT CYCLE DIAGRAM 7-1. Refrigerant Cycle Diagram 42UQV050M / 38UYV050M 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 21 FILE NO. SVM-13035 42UQV060M / 38UYV060M 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 (16 to 20m)

  • Page 22: Operation Data

    RAS- Indoor Outdoor P (MPa) T1 (°C) T2 (°C) (rps) 42UQV050M 27/19 35/24 0.9 to 1.1 11 to 13 40 to 42 High High 42UQV060M 0.9 to 1.1 11 to 13 41 to 43 <Heating>...

  • Page 23: Control Block Diagram

    FILE NO. SVM-13035 8. CONTROL BLOCK DIAGRAM 8-1. Indoor Unit 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 24 FILE NO. SVM-13035 8-2. Outdoor Unit (Inverter Assembly) – 23 –...

  • Page 25: Operation Description

    FILE NO. SVM-13035 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 26 FILE NO. SVM-13035 9-2. Operation Description ation ......................26 Basic oper 1. Operation control ....................26 2. Cooling/Heating operation ..................27 3. AUTO operation ..................... 27 4. DRY operation ......................27 2. Indoor fan motor control ..................... 28 3. Outdoor fan motor control ................... 30 4.

  • Page 27: Operation Description 1 . Basic Oper Ation

    FILE NO. SVM-13035 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 28: Cooling/Heating Operation

    FILE NO. SVM-13035 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 from the indoor controller to the outdoor unit.

  • Page 29: 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 42UQV060M 42UQV050M Fan speed COOL HEAT DRY level Fan speed Air flow r ate Fan speed Air flow rate...
  • Page 30 FILE NO. SVM-13035 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 31: Outdoor Fan Motor Control

    FILE NO. SVM-13035 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 32: Capacity Control

    FILE NO. SVM-13035 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 33: Release Protective Control By Temperature Of Indoor Heat Exchanger

    FILE NO. SVM-13035 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 34: Defrost Control (Only In Heating Operation)

    FILE NO. SVM-13035 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 35: Louver Control

    FILE NO. SVM-13035 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 36: 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 42UQV050M 42UQV060M Cool min DRY max <Heating operation>...

  • Page 37: Temporary Operation

    FILE NO. SVM-13035 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 38: Remote-A Or B Selection

    FILE NO. SVM-13035 Item Operation flow and applicable data, etc. Description 12. Remote Setting the remote controller 1. Purpose Controller-A or To separate using of remote controller for each indoor This operation is to operate only B selection unit in case of 2 air conditioner are installed nearly. one indoor unit using one remote controller.

  • Page 39: Hi-Power Mode

    FILE NO. SVM-13035 Item Operation flow and applicable data, etc. Description 14. 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 40: Eco Sleep

    FILE NO. SVM-13035 Item Operation flow and applicable data, etc. Description 17. ECO SLEEP Cooling mode The principles of comfort sleep mode are: • The preset temperature will increase as • Quietness for more comfortable. When room shown on ECO operation (Item No. 9) temperature reach setting temperature •...

  • Page 41: Auto Restart Function

    FILE NO. SVM-13035 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 42: How To Cancel The Auto Restart Function

    FILE NO. SVM-13035 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 43: Remote Controller And Its Fuctions

    FILE NO. SVM-13035 9-4. Remote controller and its function 9-4-1. Parts name of remote controller 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 44 FILE NO. SVM-13035 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 or heating operation (except in DRY and FAN ONLY mode) Press : Start and stop the operation.
  • Page 45 FILE NO. SVM-13035 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 46: Name And Functions Of Indications On Remote Controller

    FILE NO. SVM-13035 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 47: Installation Procedure

    FILE NO. SVM-13035 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 48: Optional Installation Parts

    FILE NO. SVM-13035 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 49 FILE NO. SVM-13035 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 Installation plate x 1 Remote control holder x 1 ∅3.1 x 25 s x 1 Wireless remote control x 1 Nano silver ginseng filter x 1 Battery-cover x 1 Nano photo copper zinc filter x 1...
  • Page 50 FILE NO. SVM-13035 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 51: Indoor Unit

    FILE NO. SVM-13035 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 52 FILE NO. SVM-13035 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 53 FILE NO. SVM-13035 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 54: Piping And Drain Hose Installation

    FILE NO. SVM-13035 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 50 m. or less. Hole for hang hang remote controller remote controller 5 mm Control wire out position...
  • Page 55 FILE NO. SVM-13035 <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 panel for the left or right connection and the slit on the bottom left or right side of the front panel for the bottom left or 2.
  • Page 56 FILE NO. SVM-13035 <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 57 FILE NO. SVM-13035 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 58 FILE NO. SVM-13035 10-4. Outdoor Unit Precautions for adding refrigerant 10-4-1. Installation Place • Use a scale having a precision with at least 10 g per index line when adding the refrigerant. • A place which provides enough space around the Do not use a bathroom scale or similar instrument.

  • Page 59: Refrigerant Piping Connection

    FILE NO. SVM-13035 10-4-3. Draining the Water 10-4-4. 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 60: Tightening Connection

    FILE NO. SVM-13035 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 61: Wiring Connection

    (1.4 to 1.8 kgf·m) Earth line Connecting cable Power cord Hexagon wrench Fig. 10-4-12 is required. CAUTION Model 42UQV060M 42UQV050M Service Port Cap 220-240V Single phase, 50Hz Power source 220-230V Single phase, 60Hz Valve Rod Cap Maximum running 10.0 A 13.5 A current Fig.
  • Page 62 FILE NO. SVM-13035 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. Check places for 3. Default setting of Remote Control from indoor unit (Flarenut factory is A.

  • Page 63: How To Diagnose The Trouble

    FILE NO. SVM-13035 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 64 FILE NO. SVM-13035 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 65: First Confirmation

    FILE NO. SVM-13035 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 66: Primary Judgment

    FILE NO. SVM-13035 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 67 FILE NO. SVM-13035 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 68 FILE NO. SVM-13035 11-4-2 Caution at Servicing 1. After using the service mode of remote controller finished, press the [ ] button to reset the remote controller to normal function. 2. After finished the diagnosis by the remote controller, turn OFF power supply and turn its ON again to reset the air conditioner to normal operation.
  • Page 69 FILE NO. SVM-13035 Block distinction Operation of diagnosis function Action and Judgment Check Check Display flashing Block Cause of operation conditioner code code error status Serial signal 1) Defective wiring of the Indoor unit Flashes when 1) to 3) The outdoor unit never and connecting connecting cable or operates...
  • Page 70 FILE NO. SVM-13035 Block distinction Operation of diagnosis function Action and Judgment Check Check Display flashing Block Cause of operation conditioner code code error status Outdoor P.C. Current on inverter circuit All OFF Flashes after 1. Remove connecting lead wire of the board is over limit in short time.
  • Page 71 FILE NO. SVM-13035 Block distinction Operation of diagnosis function Action and Judgment Check Check Display flashing Block Cause of operation conditioner code code error status Compressor drive output error. All OFF Flashes after 1. Check installation conditions such as (Relation of voltage, current error is detected packed valve opening, refrigerant and frequency is abnormal)
  • Page 72 FILE NO. SVM-13035 Block distinction Operation of diagnosis function Action and Judgment Check Check Display Block Cause of operation conditioner code code flashing error status Compressor does not rotate. All OFF Flashes after 1. Remove connecting lead wire of the Because of missed wiring, error is detected compressor, and operate again.

  • Page 73: Judgement Of Trouble By Every Symptom

    FILE NO. SVM-13035 11-5. Judgement of Trouble by Every Symptom 11-5-1. Indoor unit (Including remote controller) (1) Indoor unit is not operated. Operation Check Item Considerable principle cause Turn off power supply once, and Measures 5 second later, turn it on again. Item by symptoms Is OPERATION indicator flashing? Is it possible to turn on...
  • Page 74 FILE NO. SVM-13035 (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 75 FILE NO. SVM-13035 Is it possible to Does check display Replace change airflow level remote on remote show high? to “HIGH”? Change the new PC Replace board. Does fan speed motor change? Fan motor operates normally. Is it possible to Does check cross-flow Replace bearing rotate cross-flow fan by...
  • Page 76 FILE NO. SVM-13035 (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 77 FILE NO. SVM-13035 (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 78 FILE NO. SVM-13035 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 79 FILE NO. SVM-13035 11-6. Check Code 1C (Miswiring in indoor/outdoor units) and 1E <Check procedure> Gas leakage, Discharge temp. error, disconnection of TS/TC gas leakage sensors (Check code 02, 1C) (Check code 03, 1E) Valve drive check Is coil of the pulse motor valve Set it correctly.

  • Page 80: How To Diagnose Trouble In Outdoor Unit

    FILE NO. SVM-13035 11-7. How to Diagnose Trouble in Outdoor Unit Check Power Supply (Voltage Rate ±10%) Turn OFF power supply. Remove connector of compressor. • Connect discharge Check 25A resistance (approx. 100Ω, fuse (F01) 40W) or soldering iron failure? (plug) between +, –...
  • Page 81 FILE NO. SVM-13035 Does outdoor fan operate normally? Turn OFF power supply. Does compresser operate normally? Remove connector CN300 of outdoor fan motor. Check winding resistance by ohmmeter are correct? Compressor Check rotor locking by rotate is normal with hand. Can it rotate? Turn OFF power supply.

  • Page 82: How To Check Simply The Main Parts

    FILE NO. SVM-13035 11-8. How to Check Simply the Main Parts (2) Inspection procedures 1) When a P.C. board is judged to be defective, 11-8-1. How to check the P.C. board (Indoor unit) check for disconnection, burning, or discolora- tion of the copper foil pattern or this P.C. board. (1) Operating precautions 2) The P.C.
  • Page 83 FILE NO. SVM-13035 11-8-3. 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 84 FILE NO. SVM-13035 11-8-4. 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 85 FILE NO. SVM-13035 11-8-6. 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 86 FILE NO. SVM-13035 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 87: How To Replace The Main Parts

    FILE NO. SVM-13035 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 88 FILE NO. SVM-13035 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 89 FILE NO. SVM-13035 Part name Procedures Remarks Electric parts 1) Follow the procedure up to 6) 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 90 FILE NO. SVM-13035 Part name Procedures Remarks ƒ 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 ‚...
  • Page 91 FILE NO. SVM-13035 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> •...
  • Page 92 FILE NO. SVM-13035 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 93 FILE NO. SVM-13035 Part name Procedures Remarks ‡ Cross flow fan <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 94 FILE NO. SVM-13035 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 95 FILE NO. SVM-13035 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 96 FILE NO. SVM-13035 Part name Procedure Remarks ƒ Inverter 1) Perform work of item 1 in  assembly Inverter cover 2) Remove screw (ST1TØ4 × 10L 2 pcs.) of the P.C. board upper part of the front cabinet. (Soldered surface) •...
  • Page 97 FILE NO. SVM-13035 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 •...
  • Page 98 FILE NO. SVM-13035 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 99 FILE NO. SVM-13035 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 100 FILE NO. SVM-13035 Part name Procedure Remarks Electronic 1. Detachment ‰ expansion valve 1) Perform step 1 in ‚ , all the steps in ƒ coil and 1 in … Lead 2) Remove the coil by rotating it at 90° connecting part toward either direction.
  • Page 101 FILE NO. SVM-13035 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 TS sensor (Suction pipe temperature sensor) •...

  • Page 102: Exploded Views And Parts List

    43T70313 HOSE, DRAIN (42UQV060M) 43T79313 CAP, DRAIN 43T19333 HOLDER, SENSOR 43T21371 FAN-MOTOR (42UQV060M) 43T49010 PIPE, SHIELD 43T21428 FAN-MOTOR (42UQV050M) 43T82008 PLATE, INSTALLATION 43T20016 FAN, ASSY, CROSS FLOW 43T49043 HOLDER, PIPE 43T39021 BASE, BEARING 43T62031 COVER, TERMINAL 43T22312 BEARING ASSY, MOLD...

  • Page 103: File No. Svm

    Part Location Part Description Description 43T50308 SENSOR HEAT EXCHANGER 43T69739 PC BOARD ASSY 43T60331 TERMINAL; 3P (42UQV060M) 43T69320 TEMPERATURE SENSOR 43T21397 STEPPING-MOTOR 43T62003 CORD CLAMP 43T60386 MOTOR CORD 43T6V318 PC BOARD ASSY;WRS-LED 43T69738 PC BOARD ASSY (42UQV050M) – 102 –...
  • Page 104 FILE NO. SVM-13035 13-3. Outdoor unit Location Part Location Part Description Description 43T00468 FRONT CABINET 43T63329 COIL PMV 43T00459 LEFT CABINET 43T58306 REACTOR 43T42327 BASE PLATE ASSEMBLY 43T20319 PROPELLER FAN 43T00452 UPPER CABINET 43T21375 FAN MOTOR 43T19332 FAN GUARD 43T47001 NUT FLANGE 43T19330 PACKED VALVE COVER 43T97001 NUT 43T62325 ELECTRIC PART COVER...
  • Page 105 FILE NO. SVM-13035 13-4. P.C. Board Layout (Outdoor) Location Part Location Part Description Description 43T62320 HEATSINK (38UYV050M) 43T60326 FUSE 43T62331 HEATSINK (38UYV060M) 43T60377 TEMPERATURE SENSOR 43T69881 PC BOARD (38UYV060M) 43T50304 SENSOR;HEAT EXCHANGER 43T69943 PC BOARD (38UYV050M) 43T62313 BASE-PLATE-PC 43T60392 TERMINAL-5P –...
  • Page 106 TOSHIBA CARRIER (THAILAND) CO.,LTD.

This manual is also suitable for:

42uqv060m38uyv050m38uyv060m

Table of Contents