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Refrigerant; HFC-134a
Refer to "HFC-134a COOLING UNIT" Service Manual for handling this refrigerant.
SPECIFICATIONS ........................................................................................................................................... 2
DESIGNATION OF VARIOUS PARTS ............................................................................................................. 3
LIST OF ELECTRICAL PARTS ........................................................................................................................ 4
WIRING DIAGRAM .......................................................................................................................................... 5
FUNCTIONS .................................................................................................................................................... 7
MODIFICATION PROCEDURE OF THE DOOR OPEN SIDE ....................................................................... 10
ASSEMBLING PROCEDURES OF MAIN PARTS AND CAUTIONS ............................................................. 12
COOLING UNIT ............................................................................................................................................. 18
REPLACEMENT PARTS LIST ....................................................................................................................... 20
SERVICE MANUAL
REFRIGERATOR-FREEZER
MODELS
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
SHARP CORPORATION
1
S7839SE55BPWO
SJ-48H-WH
SJ-51H-WH
SJ-55H-WH
DESTINATION ................O
SJ-48H-WH
SJ-51H-WH
SJ-55H-WH
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Summary of Contents for Sharp SJ-48H-WH

  • Page 1 SJ-48H-WH SJ-51H-WH SJ-55H-WH SERVICE MANUAL S7839SE55BPWO REFRIGERATOR-FREEZER SJ-48H-WH MODELS SJ-51H-WH SJ-55H-WH 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.
  • Page 2: Specifications

    172/178/184 182/186/190 Rated input of heating element 137/150/163 Refrigerant (Charging quantity) HFC-134a(125g) HFC-134a(130g) Net Weight (kg) COLOR Items SJ-48H-WH, SJ-51H-WH, SJ-55H-WH Outside color White Inside color White OPTIONAL ITEM SJ-L815HD(REFRIGERATOR HINGE KITS). For changing the door to left side opening.
  • Page 3: Designation Of Various Parts

    SJ-48H-WH SJ-51H-WH SJ-55H-WH DESIGNATION OF VARIOUS PARTS The names in parenthesis are the denominations used in the REPLACEMENT PARTS LIST. 1. Freezer shelf (LARGE) (Freezer tray L) 2. Freezer temp. control knob 3. Freezer shelf (SMALL) (Freezer tray S) 4. Ice cube maker 5.
  • Page 4: List Of Electrical Parts

    SJ-48H-WH SJ-51H-WH SJ-55H-WH LIST OF ELECTRICAL PARTS ITEMS TYPE NAME RATING SPECIFICATIONS F-Thermostat MM1-8025 125V 6A (At normal notch) 250V 3A ON/OFF : -17/-22˚C Defrost thermostat US-602S 250V 8A Open/Close : 10/1˚C Thermo. fuse SF70E 250V 10A Working temp. : 70˚C...
  • Page 5: Wiring Diagram

    SJ-48H-WH SJ-51H-WH SJ-55H-WH WIRING DIAGRAM Be sure to replace the electrical parts with specified ones for maintaining the safety and performance of the set. : GRAY : BROWN (live) : ORANGE : YELLOW : RED CONNECTED IN TERMINAL BOX : PINK...
  • Page 6 SJ-48H-WH SJ-51H-WH SJ-55H-WH C1(LR-09-1V) Fan motor Defrost thermo. FREEZER F-thermostat (Br) (E.V cov. ass'y) (Bk) Thermo. fuse Defrost heater C2(ELR-02V) Door switch C3(ELR-06V) 3(Push close) 4(Push open) (S-B) (C-part. ass'y) REFRIGERATOR C4(LR-09-1V) Defrost timer (Bk) (RC-box ass'y) (S-B) (Br) Lamp...
  • Page 7 SJ-48H-WH SJ-51H-WH SJ-55H-WH FUNCTIONS 1. ADJUSTABLE TEMPERATURE CONTROL (1) Temperature control of freezer Thermostat (senses freezer temperature) operates on ON/OFF switch over to control the compressor and allows the freezer temperature to keep at a suitable temperature. However adjust the freezer temp. control knob as follows depending upon the storing condition of foods.
  • Page 8 SJ-48H-WH SJ-51H-WH SJ-55H-WH 2. DEFROSTING (1) No defrosting operation is necessary (2) Where is melted ice brought No defrosting operation is necessary. 1. Melted ice is brought into the evaporating As this machine is so designed that a built-in pan at the bottom of the set and is evaporated evaporator cools air and a fan circulates cooled air, here by the heat of sub condenser.
  • Page 9 SJ-48H-WH SJ-51H-WH SJ-55H-WH (4) As a reference to determine the causes of trouble, malfunction and phenomena are described below. Refer to the following when repairing. 1. Disconnection of defrost heater As off-cycle defrosting is performed, the defrosting time is extremely prolonged. Each time defrosting is started, the freezer temperature rises and a portion of ice and stored foods are melted.
  • Page 10: Modification Procedure Of The Door Open Side

    SJ-48H-WH SJ-51H-WH SJ-55H-WH MODIFICATION PROCEDURE OF THE DOOR OPEN SIDE It is possible to change the door to left side opening. To modify the door to left side opening, REFRIGERATOR HINGE KITS (for left side opening) SJ-L815HD (optional item )is necessary.
  • Page 11 SJ-48H-WH SJ-51H-WH SJ-55H-WH...
  • Page 12 SJ-48H-WH SJ-51H-WH SJ-55H-WH ASSEMBLING PROCEDURES OF MAIN PARTS AND CAUTIONS CAUTION: DISCONNECT THE UNIT FROM THE POWER SUPPLY BEFORE ANY REPAIRING. 1. R-CONTROL COV. ASSEMBLY Defrost timer A-sealer air guid. B D timer lead ass'y A-sealer air guid. C Lamp socket...
  • Page 13 SJ-48H-WH SJ-51H-WH SJ-55H-WH C-box base Start A sealer air guid. C Overlap A-sealer A-sealer RC-duct RC-duct datum C-box base A-sealer A-sealer datum RC-box RC-box Start Overlap (The back of C-box base) SEC. BB (2) Forming sensor of Damper thermostat Damper thermostat Stick thermo.
  • Page 14 SJ-48H-WH SJ-51H-WH SJ-55H-WH (4) Fixing of Lamp socket, Defrost timer SKY-BLUE Defrost timer Connect Insert Pin No.6 D timer lead ass'y R-Cbox cover BROWN Lamp Insert Pin No.7 socket Screw Lamp (5) Fixing of R-Cbox cover Claws(2 places) Set R-temp. control knob...
  • Page 15: Cover Assembly

    SJ-48H-WH SJ-51H-WH SJ-55H-WH 2. E.V COVER ASSEMBLY F-thermostat Lead E.V cover ass'y. E.V cover sealer E L-band C E.V cover sealer B E.V cover E.V cover sealer C Fan clamp Propeller fan L-band C Fan motor cushion A Defrost thermo. ass'y...
  • Page 16 SJ-48H-WH SJ-51H-WH SJ-55H-WH (2) Fixing of Fan motor and Fan Motor cushion Motor cushion Fan motor cushion B Fan motor cushion A Fan motor Fan motor cushion B cushion A Motor Motor cushion cushion Sec CC See DD Motor cushion...
  • Page 17 SJ-48H-WH SJ-51H-WH SJ-55H-WH (3) Wiring of Lead Wire L-band C Defrost thermo. ass'y Alminum tape L-band C Fuse ass'y Detail Detail Detail Lead wire “WHITE” Bend this pin Fasten Defrost thermo. ass'y's wires as bellow. And set it inside of the four pins.
  • Page 18: Cooling Unit

    SJ-48H-WH SJ-51H-WH SJ-55H-WH COOLING UNIT SJ-48H Mark: Refrigerant flow Mark: Brazing portion Hot pipe L Hot pipe Hot pipe R (Side condenser) (DP-condenser) (Side condenser) Evaporator Suction pipe Sub. condenser Compressor Capillary tube Dryer Figure C-1. Cooling unit Dryer Capillary tube...
  • Page 19 SJ-48H-WH SJ-51H-WH SJ-55H-WH SJ-51H, SJ-55H Mark: Refrigerant flow Mark: Brazing portion Hot pipe L Hot pipe Hot pipe R (Side condenser) (DP-condenser) (Side condenser) Back condenser Evaporator Suction pipe Sub. condenser Compressor Connector pipe Capillary tube Dryer Figure C-3. Cooling unit...
  • Page 20: Replacement Parts List

    SJ-48H-WH SJ-51H-WH SJ-55H-WH REPLACEMENT PARTS LIST REF. NO. PART NO. DESCRIPTION Q'TY CODE SJ-48H SJ-51H SJ-55H ELECTRIC PARTS 1- 1 RTHM-A057CBE0 F-thermostat 1- 2 RSTT-A126CBE0 Starting relay 1- 3 QSWTDA035CBE0 Defrost timer 1- 4 PDMP-A025CBE0 Damper thermostat 1- 5 FTHM-A012CBK0 Defrost thermo.
  • Page 21: Door Parts

    SJ-48H-WH SJ-51H-WH SJ-55H-WH REF. NO. PART NO. DESCRIPTION Q'TY CODE SJ-48H SJ-51H SJ-55H 2-74 PSEL-B122CBE0 A-sealer thermo. cap. 2-75 PSEL-B124CBE0 A-sealer air guid. B 2-76 LHLD-A124CBFB K-frame holder 2-78 LPLTMA399CBP0 Dryer support 2-79 LBND-A019CBE0 Nylon band 2-80 PBOX-A071CBFA Terminal box...
  • Page 22: How To Order Replacement Parts

    SJ-48H-WH SJ-51H-WH SJ-55H-WH REF. NO. PART NO. DESCRIPTION Q'TY CODE SJ-48H SJ-51H SJ-55H 6- 1 PCMPLA134CBE0 Compressor 6- 2 PSPAGA028CBE0 Rubber grommet 6- 3 FCONSA051CBK0 Sub. condenser ass’y 6- 3 FCONSA052CBK0 Sub. condenser ass’y 6- 4 FFRM-A085CBK0 Base frame ass’y...
  • Page 23 SJ-48H-WH SJ-51H-WH SJ-55H-WH DOOR PARTS 3-10 3-5-2 3-14 3-10 3-25 3-12 3-15-4 3-20 3-5-1 3-5-3 3-15-3 3-15 3-16 3-17 3-20 3-15-2 3-15-1 SJ-48H SJ-51H SJ-55H...
  • Page 24: Cabinet Parts

    2-41 6-12 6-18 2-86 2-84 6-15 90-2 1-11 6-25 2-26 2-57 2-27 2-83 2-31 4-15 6-21 2-74 2-56 2-55 5-12 1-25 5-25 1-15 5-24 5-15 6-13 5-16 5-21 5-14 5-20 SJ-48H SJ-51H SJ-55H '98 SHARP CORP. (7U0.14E) Printed in Japan...
  • Page 25: Table Of Contents

    '96 SPECIFIC FREON REGULATIONS ........................ 2 OUT LINE OF CYCLE REPAIR CEOURE FOR HFC-134a .................. 3 CYCLE REPAIR CEOURE FOR HFC-134a ......................4 1. NITROGEN REPLACEMENT PROCEDURE ....................4 2. VACUUM EVACUATION AND GAS CHARGE PROCEDURE ..............6 SHARP CORPORATION...
  • Page 26: Specific Freon Regulations

    Freon in the worldwide scale. SHARP Corporation has decided to disuse Freon, use of which is regulated by the Montreal Protocol, and to use the alternative Freon HFC-134a as a refrigerant and the nonfreon heat insulator as a heat insulation.
  • Page 27: Out Line Of Cycle Repair Ceoure For Hfc-134A

    OUT LINE OF CYCLE REPAIR CEOURE FOR HFC-134a High [For CFC-12] pressure pressure When the cycle repair is required, the vacuum pump and the charging cylinder are connected to the gauge manifold Gauge manifold as shown below. The cycle for the HFC-134a needs the improvement of vacuum level.
  • Page 28: Cycle Repair Ceoure For Hfc-134A

    CYCLE REPLACEMENT PROCEDURE 1. NITROGEN REPLACEMENT PROCEDURE 1) Remove the compressor and dryer. 2) Install the new compressor on the base frame. 3) Connect all the pipes excepting the connection of dryer and capillary tube. 4) Connect the nitrogen gas tank to the charging pipe of compressor, apply pressure of about 80 x 10 Pa (approx.
  • Page 29 HIGH-PRESSURE SIDE NITROGEN BLOW Blow of bottom condenser and inner condenser Blow of back condenser Inner condenser Dryer side Blow from compressor oil cooler side pipe Back condenser Bottom condenser Blow of back condenser Figure 2 LOW-PRESSURE SIDE NITROGEN BLOW Blow of suction pipe and dryer Blow from compressor charging pipe Evaporator...
  • Page 30: Vacuum Evacuation And Gas Charge Procedure

    2. VACUUM EVACUATION AND GAS CHARGE PROCEDURE VACUUM EVACUATION Vacuum evacuation The process to be performed is (1) Vacuum evacuation (5min.) (2) Refrigerant charge (50 g) Vacuum evacuation (10 min.) (4) Refrigerant charge (specified quantity). Do not stop the power supply of the vacuum pump until completion of works (1) to (3) shown above so as to prevent back-flow of vacuum pump oil.
  • Page 31: Working Procedure

    WORKING PROCEDURE 1) Start the vacuum pump. (Do not stop the pump until completion of vacuum evacuation of step (13).) 2) At first open the VB valve, and then open the LB and HB valves. High pressure pressure SYSTEM ANALYZER HFC-134aŒp HFC-134a For HFC-134a...
  • Page 32 6) Close the CB and LB valves (close all the valves). High pressure pressure For HFC-134a HFC-134a SYSTEM ANALYZER HFC-134aŒp 7) Loosen the joint A to discharge gas. High Check the high-low pressure balance. pressure pressure Check the high-low pressure balance. HFC-134a SYSTEM For HFC-134a...
  • Page 33 10) Close the joint A which has been loosened in Step (7). High pressure pressure Slightly open the CB valve, and discharging gas, close A. (Inside purge of hose) For HFC-134a HFC-134a SYSTEM ANALYZER HFC-134aŒp 11) At first open the VB valve of vacuum pump. Then, slowly open the LB and HB valves to evacuate the High cycle.
  • Page 34 16) Valve state after refrigerant filling (Only the LB valve is open.) High pressure pressure For HFC-134a HFC-134a SYSTEM ANALYZER HFC-134aŒp 17) Ascertain that the high pressure gauge indicates 1.0 High kgf/cm G or more, pinch the high pressure side service pressure pipe with the pinching jig, remove the gauge manifold, and braze the front end of pipe.
  • Page 35 20) Run the compressor, and check the refrigerator is cooled. (Ascertain that the temperature of discharge pipe and condenser rises.) Notes: (1) The procedures stated above are intended to attain the high vacuum level required for HFC- 134a and to prevent back flow of vacuum pump oil into the cycle. (2) The works stated above must be performed with the use of service and repair equipment and jigs for HFC-134a.
  • Page 36 '94 SHAP CORP. (9U0.50E) Printed in Japan...

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