Sharp DW-71-H Service Manual

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PRECAUTION ....................................................................................................................................................... 2

SPECIFICATION ................................................................................................................................................... 6

PRINCIPLE OF DEHUMIDIFING FUNCTION ...................................................................................................... 7

NAMES AND FUNCTIONS OF PARTS ............................................................................................................... 8

EXPLANATION OF FUNCTION ........................................................................................................................... 9

DISASSEMBLING AND REPLACEMENT OF MAIN PARTS ............................................................................. 12

CIRCUIT DIAGRAM AND EXPLANATION OF OPERATION ............................................................................ 17

TROUBLESHOOTING AND CORRECTIVE ACTIONS ...................................................................................... 21

LIST OF TROUBLES AND CORRECTIVE ACTIONS ......................................................................................... 22

ADAPTATION TO '96 CHLOROFLUOROCARBON REGULATIONS ................................................................. 25

HFC-134a CYCLE REPAIR PROCEDURE ......................................................................................................... 26

PACKING ............................................................................................................................................................. 34

REPLACEMENT PARTS LIST ............................................................................................................................ 35

SERVICE MANUAL

MODEL

In the interests of user-safety (Required by safety regulations in some

countries) the set should be restored to its original condition and only

parts identical to those specified should be used.

SHARP CORPORATION

DEHUMIDIFIER

DW-71-H

SY657DW71HH//

Page

Table of Contents

Summary of Contents for Sharp DW-71-H

Page 1: Table Of Contents
DW-71-H SERVICE MANUAL SY657DW71HH// DEHUMIDIFIER DW-71-H MODEL In the interests of user-safety (Required by safety regulations in some countries) the set should be restored to its original condition and only parts identical to those specified should be used. TABLE OF CONTENTS Page PRECAUTION ...............................
Page 2: Precaution
Directives 89/336/EEC and 73/23/EEC as amended by 93/ 68/EEC. Should the supply cord be damaged, it must be replaced by a service center approved by Sharp as special tool are required. Do not operate the unit in a closet or in a narrow space between furniture.
Page 3 DW-71-H Note Make sure that the unit is operated on a flat and solid surface. Uneven surface can cause spilling of the stored water and wet other household furnitures or appliances and cause electric shock, electrical leakage or fire. During continuous drainage, make sure that the hose is not bent and the hose outlet is laid down properly.
Page 4 DW-71-H Note After making sure that the power supply plug is not covered with dust, insert the plug into the socket firmly. When there is dust or the connection is improper, electric shock or fire might be resulted. Attention Important Do not obstruct the air outlets and air intake.
Page 5 DW-71-H Note Make sure to turn off the power and unplug the unit before carrying out maintenance. The rapidly rotating internal fan can cause injuries. Before moving the unit make sure that the power is turned off and the water is drained from the tank.
Page 6: Specification
DW-71-H SPECIFICATION Model DW-71-H Rated dehumidifying capacity 6.3 L/day (daily dehumidifying capacity in conditions of room temperature 27˚C and relative humidity 60%) Rated voltage 230V Rated frequency 50Hz Power Rated current 1.0A 187W consumption Dehumidifying mode Drying Clothes mode 190W...
Page 7: Principle Of Dehumidifing Function
DW-71-H PRINCIPLE OF DEHUMIDIFING FUNCTION (Wet air) Eevaporator : The evaporator the vapor contained in the indoor air and condensate it to trap. Condenser: The condenser heats the air cooled by the cooler. Fan: The fan sucks in the wet air, and discharges the dry air sent from the condenser into the inddor space.
Page 8: Names And Functions Of Parts
DW-71-H NAMES AND FUNCTIONS OF PARTS...
Page 9: Explanation Of Function
DW-71-H EXPLANATION OF FUNCTION 1. Operation modes (1) Dehumidifying mode (2) Drying clothes mode Operation procedure .Insert the power plug into the socket. 2. Ascertain that the water tank has been installed correctly. 3. Press the power ON/OFF button. 4. Choose the proper operation mode with the operation mode selection button.
Page 10 DW-71-H 2. Changing the airflow direction To dehumidify your room Upward To dry clothes Push the lever upward. Perform the drying clothes operation. To dehumidify a closet or wall Diagonally downward Push the lever downward. Open the door of the closet and operate the unit in front of it.
Page 11 DW-71-H 4. Continuous drainage You can continuously drain the water from the unit with the use of the right draining facilities. Make sure to turn off and unplug the unit before carrying out the following procedures. Punch out the continuous drainage hole.
Page 12: Disassembling And Replacement Of Main Parts
DW-71-H DISASSEMBLING AND REPLACEMENT OF MAIN PARTS (3) Remove one screw at the center on the rear of main (*Assemble the parts in the reverse order of disassembling) body. [Screw C] Before disassembling Use the special screwdriver which matches the Remove the filter frame and the water tank.
Page 13 DW-71-H 3. Removing the main unit front part Main parts (1) Remove the casing SK fixing screws (2 pcs.). (Handle reinforcement angle fixing screws) Power supply PWB Evaporator top box Magnetic coil Screw Evaporator Dryer Fin cover Filter Suction pipe ass'y...
Page 14 DW-71-H (3) Remove the PWB fixing screws (2 pcs.). 6. Removing the operation PWB For compressor cord (1) After removing the front part of main unit remove For defrosting lamp For magnetic coil the switch box fixing screws (3 pcs.).
Page 15 DW-71-H 8. Removing the FULL switch 9. Removing the protector (1) After removing the rear part of main unit disengage (1) After removing the rear part of main unit, widen the the rib of dew pan with which the switch holder is fixture of upper part of compressor, and remove the engaged, and withdraw the switch holder.
Page 16 DW-71-H 10. Removing the damper (for air direction change) 13.Removing the water tank handle and float After removing the rear part of main unit remove the (1) Fit the protrusion of handle to the dent of water screws (2 pcs.) fixing the damper support.
Page 17: Circuit Diagram And Explanation Of Operation
DW-71-H CIRCUIT DIAGRAM AND EXPLANATION OF OPERATION Circuit diagram...
Page 18 DW-71-H...
Page 19 DW-71-H 1. Explanation of operation Operation mode (1) When the START button is pressed, power supply for the compressor and fan motor is turned on, and the dehumidification operation is started. Using the operation selection button, select the dehumidification operation or the drying clothes operation.
Page 20 DW-71-H 3. Location of PWB parts (1) Power supply PWB Parts side (2) Operation PWB Parts side...
Page 21: Troubleshooting And Corrective Actions
DW-71-H TROUBLESHOOTING AND CORRECTIVE ACTIONS 1. Checking the use state and handling When you receives any complaint from user, you must make correct judgment for proper troubleshooting. There are many cases where incorrect information from user and preconception of troubles impede correct troubleshooting.
Page 22: List Of Troubles And Corrective Actions
DW-71-H LIST OF TROUBLES AND CORRECTIVE ACTIONS When replacing parts, be sure to use the specified parts. Servicing of PWB assembly The electrical circuit consists of operation PWB ass’y and power supply PWB ass’y. Both of them correspond to X.
Page 23 DW-71-H Trouble Checking Troubleshooting and cause Corrective action 5. The fan motor fails Both end voltage of fan • Voltage detected: Check the fan Repair or replace to run. motor motor. • Voltage not detected: Check the Repair or replace drive circuit.
Page 24 DW-71-H ReferencesThermistor resistance Thermistor for defrosting Temperature(˚C) Resistance(kΩ) -5.0 237.1 179.5 156.6 137.0 10.0 105.3 12.0 95.02 15.0 81.59 20.0 63.65 25.0 49.99...
Page 25: Adaptation To '96 Chlorofluorocarbon Regulations
1995 and to use the substance less adversely affecting the ozone layer in the world scale. Now, Sharp uses the chlorofluorocarbon replacing substance HFC-134a for refrigerator coolant. It is applied also for the new models of dehumidifier DW71-H.
Page 26: Hfc-134A Cycle Repair Procedure
DW-71-H HFC-134a CYCLE REPAIR PROCEDURE Refrigerator cycle repair Additional valve As the service tools for the coolant gas CFC-12 (R-12) cannot be used for HFC-134a, the specific tools must be used. “FOR HFC-134a” must be indicated. Gauge manifold The connections of service tools are different.
Page 27 DW-71-H 2.Others 1. Do not use any tools for HFC-134a (for refrigerator) other than common-use tools shown in the list above. Otherwise adverse influence upon the refrigerator performance may occur. 3. Before brazing replace the air with nitrogen (so as to prevent clogging of capillary tube by oxide scale).
Page 28 DW-71-H [Gas leak inspection procedure] 1. Remove the compressor and Filter dryer. 2. Install the new compressor and Filter dryer. 3. Braze the connections of compressor, dryer, evaporator, condenser and all other piping connections. 4. Connect the dryer charge pipe and accumulator charge pipe to the nitrogen cylinder with the gauge manifold, apply pressure approx.
Page 29 DW-71-H [Evacuation/gas charge procedure] Evacuation (1) Evacuation (5 minutes) (2) Coolant charging (approx. 30 g) (3) Evacuation (30 minutes) Coolant gas charging (specified amount) The check valve is provided additionally to prevent back flow of vacuum pump oil. The power supply for the...
Page 30 DW-71-H (1) Start the vacuum pump. (Do not stop the vacuum pump until the evacuation of Step 13 is not completed.) (2) At first open the additional valve of gauge manifold, and then open the low pressure valve and high pressure valve.
Page 31 DW-71-H (7) Loosen the joint (a) to release gas. Check balance of high/low pressure. (8) Open the high pressure valve of gauge manifold to discharge gas so that the high pressure gauge pressure reduces down to 1.0 kgf/cm G. (When 1.0 kgf/cm G is reached, close the high pressure valve.)
Page 32 DW-71-H (11) At first open the additional valve of gauge manifold. Then, slowly open the low pressure side and high pressure side to evacuate the cycle. (Do not apply undue load to the vacuum pump.) (12) Evacuate for 30 minutes (with valves opened).
Page 33 DW-71-H (18) Ascertain that the high pressure gauge indicates 1.0 kgf/cm G or above, tight close the high pressure side service pipe with the pinching jig, remove the gauge manifold, and braze the front end of pipe. (If the pipe is tight closed when the high pressure gauge pressure is below 1.0 kgf/cm G, air may be sucked in.)
Page 34: Packing
DW-71-H PACKING 1. Fix the front door of water tank to the main body 5. Put in the bottom pad, put the product, and put (left and right sides) with tape. on the top pad. Printed matters Tape 40mm x 40mm...
Page 35: Replacement Parts List
DW-71-H REPLACEMENT PARTS LIST REF. NO. PART NO. DESCRIPTION Q'TY CODE ELECTRIC PARTS 1- 1 DPWB-A150PRK0 Control P.W.B. unit 1- 2 RC-EZA010FBE0 Running capacitor 4µF 1- 3 RMOT-A046FBE0 Fan motor 1- 4 DPWB-A149PRK0 Power supply P.W.B. unit 1- 5 FACCJA025FBK0...
Page 36 DW-71-H REF. NO. PART NO. DESCRIPTION Q'TY CODE 6-12 LANG-A028FBE0 Fixing angle 6-13 PCOV-A031FBE0 Terminal cover 6-14 PSEL-A089FBE0 Cover gasket PACKING PARTS 90- 1 SPADBA012FBE0 Top pad 90- 2 SPADBA013FBE0 Bottom pad 90- 3 SPAKCA095FBE0 Packing case 90- 4 SSAKHA013FBE0...
Page 37 DW-71-H 2-34 2-45 2-43 2-29 1-14 2-28 2-27 2-26 1-11 2-32 6-10 2-20 2-33 2-16 2-35 1-10 6-12 2-22 6-13 2-37 2-36 6-14 2-44 2-21 2-15 2-46 2-19 2-18 2-14 2-39 2-17 2-38 2-42 2-40 6-11 2-41 1-13 1-12 2-23...
Page 38 DW-71-H...
Page 39 DW-71-H...
Page 40 DW-71-H '96 SHARP CORP. (YU0.10E) Printed in Japan...

Sharp DW-71-H Service Manual

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Summary of Contents for Sharp DW-71-H

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