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Related Manuals for Fisher & Paykel RX256DT4X1 FP
Summary of Contents for Fisher & Paykel RX256DT4X1 FP
- Page 1 Service Manual Side-by-Side Refrigerator Fisher & Paykel Models: RX256DT4X1 FP RX256DT7X1 FP Elba Models: RX256ET2B1 EL RX256ET2W1 EL 321023...
- Page 2 321023 - MAY 2009 PRODUCT Fisher & Paykel Brand: RX256DT4X1 FP, RX256DT7X1 FP Models: Elba by Fisher & Paykel Brand: RX256ET2B1 EL, RX256ET2W1 EL Models: Fisher & Paykel Appliances Inc Fisher & Paykel Appliances Canada Inc 5800 Skylab Rd, 2900 – 595 Burrard Street...
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Page 3: Table Of Contents
321023 CONTENTS COMPONENT SPECIFICATIONS ....................8 PRODUCT DESIGN ........................9 Refrigeration System ........................9 Fully Electronic Defrost System ....................9 Refrigerant Flow ........................11 Cabinet Air Flow ........................12 Ice And Water Dispenser Diagram ..................13 Water Valve Diagram ......................14 Typical External Sweat Pattern ....................15 INSTALLATION ..........................16 WATER FILTER REMOVAL AND INSTALLATION (SELECTED MODELS) ......19 Initial Installation........................19 Replacing Water Filter......................19... - Page 4 321023 ELECTRONIC CONTROL BOARD....................33 Full Electronic Specification Control Board (RX256DT7X1) ...........34 8.1.1 Programming Mode ......................34 8.1.2 Forced Defrost Mode .......................35 8.1.3 Service Test Mode......................35 8.1.4 Service Test Mode - Navigation..................36 8.1.4.1 Service Test 001 - Power-Up Test Results...............36 8.1.4.2 Service Test 101 - Defrost Heater................37 8.1.4.3 Service Test 102 - Compressor/Condenser System.
- Page 5 321023 8.3.3 Service Test Mode......................58 8.3.4 Service Test Mode – Navigation..................58 8.3.4.1 Service Test 1 – Defrost Thermostat & Defrost Circuit Test........59 8.3.4.2 Service Test 2 - Compressor/Condenser Fan Test..........59 8.3.4.3 Service Test 3 - Evaporator/Freezer Fan Test............59 8.3.4.4 Service Test 4 - Refrigerator Thermistor Test.
- Page 6 321023 11.3.6 Overload/Relay ........................84 11.3.7 Condenser Removal ......................85 11.4 Bottom of Cabinet ........................85 11.4.1 Front Levelling Rollers .....................85 11.4.2 Rear Levelling Rollers......................85 11.5 Cabinet Doors.........................85 11.5.1 Door Gaskets........................85 11.5.2 Dispenser Façade......................85 11.5.3 Dispenser Ice Chute Door ....................86 11.5.4 Dispenser Light Socket....................86 11.5.5 Dispenser D/C Solenoid ....................86 11.5.6...
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Page 7: Important Information
321023 IMPORTANT INFORMATION Important Notices for Service Technicians and Consumers Fisher & Paykel Appliances will not be responsible for personal injury or property damage from improper service procedures. Pride and workmanship go into every product to provide our customers with quality products. It is possible, however, that during its lifetime a product may require service. Products should be serviced only by a qualified service technician who is familiar with the safety procedures required in the repair and who is equipped with the proper tools, parts, testing instruments and the appropriate service information. -
Page 8: Component Specifications
321023 COMPONENT SPECIFICATIONS WARNING To avoid risk of electrical shock that can cause death or severe personal injury, disconnect unit from power before servicing unless tests require power. Discharge capacitors through a 10,000 ohm resistor before handling. Wires removed during disassembly must be replaced on correct terminals to ensure proper grounding and polarization. -
Page 9: Product Design
321023 Light Switch (RX256DT4X1, Type ....................... SPST NC RX256ET2B1, Volts ....................... 125/250 VAC RX256ET2W1) Current ......................8/4 amps Light Switch / Interlock Type ....................... SPDT NO/NC Volts ....................... 125/250 VAC Current ......................8/4 amps Solenoid (Ice Chute) Resistance across leads ................101 ohms ± 10% Ice Maker Harvest 4 lbs of ice per 24 hours. - Page 10 321023 After initial power up, the defrost interval is 4 hours compressor run time. Defrost occurs immediately after the 4 hours. Note: Once the unit is ready to defrost, there is a 4 minute wait time prior to the beginning of the defrost cycle.
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Page 11: Refrigerant Flow
321023 Refrigerant Flow... -
Page 12: Cabinet Air Flow
321023 Cabinet Air Flow... -
Page 13: Ice And Water Dispenser Diagram
321023 Ice And Water Dispenser Diagram... -
Page 14: Water Valve Diagram
321023 Water Valve Diagram... -
Page 15: Typical External Sweat Pattern
321023 Typical External Sweat Pattern... -
Page 16: Installation
321023 INSTALLATION... - Page 17 321023...
- Page 18 321023...
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Page 19: Water Filter Removal And Installation (Selected Models)
321023 WATER FILTER REMOVAL AND INSTALLATION (SELECTED MODELS) WARNING To avoid serious illness or death, do not use the refrigerated water where the water is unsafe or of unknown quality without adequate disinfection before or after filtration. CAUTION After installing a new water filter, always dispense water for two minutes before removing the filter for any reason. -
Page 20: Temperature Controls & User Options
321023 TEMPERATURE CONTROLS & USER OPTIONS Warm Cabinet Temperatures At times, the front of the refrigerator cabinet may be warm to touch. This is a normal occurrence that helps prevent moisture from condensing on the cabinet. This condition will be more noticeable when the refrigerator is first started, during hot weather and after excessive or lengthy door openings. -
Page 21: Reset Filter (Selected Models)
321023 Reset Filter (Selected Models) When a water filter has been installed in the refrigerator, the yellow ORDER light will illuminate when 90 percent of the volume of water for which the filter is rated has passed through the filter OR 11 months have elepsed since the filter has been installed. -
Page 22: User Preferences
321023 User Preferences Access the User Preferences menu to: Activate or deactivate Super Cool (selected models). Change the temperature display from F to Enable or diable audible alarms. Adjust the light level at which the Dispenser Auto Light will illuminate (when this feature is activated on the ice and water dispenser) (selected models). -
Page 23: Ice And Water
321023 ICE AND WATER Dispenser Features (Selected Models) Full Electronic Specification Dispenser Panel Mid Electronic Specification Dispenser Panel Elba Dispenser Panel... -
Page 24: Dispensing Light (Selected Models)
321023 6.1.1 Dispensing Light (Selected Models) A light activates within the dispenser area at full power when dispensing ice or water with the main dispenser pad. 6.1.2 Dispenser Pad The dispenser pad is located on the back wall of the dispensing area. When the dispenser pad is pressed, the selection chosen on the dispenser control panel will dispense. -
Page 25: Ice Dispenser Operation
321023 6.2.1 Ice Dispenser Operation To Dispense Ice: Select Crush or Cube mode by pressing the appropriate keypad on the dispenser control panel. A green light above the keypad indicates the mode selected. Press a container against the dispenser pad. When dispensing crushed ice, hold the container as close as possible to the chute to reduce spraying. -
Page 26: Sabbath Mode (Selected Models)
321023 6.2.6 Sabbath Mode (Selected Models) When activated, the Sabbath Mode deactivates the control lights while leaving the controls operational. To Activate Sabbath Mode: Press and hold both the LOCK and AUTO LIGHT keypads simultaneously for three to four seconds, or until the control lights turn off. To Deactivate Sabbath Mode: Press and hold both the LOCK and AUTO LIGHT keypads simultaneously for three to four seconds, or until the control lights turn on. -
Page 27: Component Testing
321023 COMPONENT TESTING Component Description Test Procedures Compressor When compressor electrical Resistance test circuit is energized, the start 1. Disconnect power to unit. winding current causes relay 2. Discharge capacitor by shorting across terminals with a resistor to heat. After an amount of for 1 minute. - Page 28 321023 Component Description Test Procedures Capacitor Run capacitor connects to relay terminal 3 and L side of line. WARNING To avoid electrical shock which can cause Some compressors do not require a run capacitor; refer to the Technical Data Sheet for severe personal injury or death, discharge the unit being serviced.
- Page 29 321023 Component Description Test Procedures Overload/Relay When voltage is connected 1. Disconnect power to the refrigerator. and relay is cool, current 2. Remove relay cover and disconnect leads. passes through relay to start 3. Check resistance across terminals 2 and 3 with an ohmmeter: winding.
- Page 30 321023 Component Description Test Procedures Drier Drier is placed at post Drier must be changed every time the system is opened for condenser loop outlet and testing or compressor replacement. passes liquefied refrigerant to the capillary. Before opening refrigeration system, recover HFC134a refrigerant for safe disposal.
- Page 31 321023 Component Description Test Procedures Evaporator Inner volume of evaporator Test for leaks in evaporator with electronic leak detector or allows liquid refrigerant with leak detection fluid. discharged from capillary to Compressor oil is circulated with refrigerant; check for oil when expand into refrigerant gas.
- Page 32 321023 Component Description Test Procedures Main control board The control of cabinet Refer to specific the Technical Data Sheet supplied with the components such as unit for troubleshooting procedures. compressor and defrost heater is carried out by this board via relays mounted on the board.
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Page 33: Electronic Control Board
321023 ELECTRONIC CONTROL BOARD The difference between the full electronic specification cabinet and the mid electronic specification cabinet are as follows: The full electronic specification cabinet consists of a main high voltage board located in the compressor compartment with a display board mounted in the top of the fresh food compartment, and a dispenser board mounted in the front of the freezer compartment. -
Page 34: Full Electronic Specification Control Board (Rx256Dt7X1)
321023 Full Electronic Specification Control Board (RX256DT7X1) 8.1.1 Programming Mode A manual method of entering the program code is available for use when replacing controls in the field for repair. Improper use of this feature may result in performance problems. Great care should be exercised when setting program codes. -
Page 35: Forced Defrost Mode
321023 8.1.2 Forced Defrost Mode A manual method to force defrosts for use in testing is provided. This mode can be used to force an immediate defrost followed by either a short period (8 –12 hours) or a long period (> 72 hours) of compressor cycle time to the next defrost. -
Page 36: Service Test Mode - Navigation
321023 • Entry to the service menu is confirmed by pressing the Refrigerator Temperature Up keypad once more. • The display will read the first test. • All control functions will be turned off (compressor, defrost, evaporator fan, and the damper will remain in its current position). -
Page 37: Service Test 101 - Defrost Heater
321023 • Error Code 6 • This error code indicates a shorted freezer thermistor. Service test 142 can be helpful to determine the state of freezer thermistor (refer to Section 8.1.4.7 for troubleshooting). This failure may be caused by a bad wiring harness or defective thermistor (refer to thermistor chart in Section 8.1.13). -
Page 38: Service Test 102 - Compressor/Condenser System
321023 DEFROST THERMOSTAT OPEN DEFROST THERMOSTAT CLOSED 8.1.4.3 Service Test 102 - Compressor/Condenser System. When selected and activated, this test will operate the compressor/condenser fan circuit. A service technician should evaluate proper operation of the compressor and condenser fan. The Refrigerator Temperature Up/Down keypads will toggle the compressor drive circuit between "On"... -
Page 39: Service Test 121 - Damper Operation
321023 8.1.4.5 Service Test 121 - Damper Operation. When selected, the refrigerator display will show the status of the refrigerator damper. The Refrigerator Temperature Up / Down keypads will toggle the damper to open and close position. The technician must allow 1 minute for each attempt to change the damper position. If the technician tries to change the state of the damper during this 1 minute wait time, the system will give a short beep and the damper state will not change. -
Page 40: Service Test 142 - Freezer Thermistor Test. (See Thermistor Chart In Section 8.1.13)
321023 8.1.4.7 Service Test 142 - Freezer Thermistor Test. (See Thermistor Chart in Section 8.1.13). When selected and activated, the refrigerator display will show the temperature reading in the freezer compartment. This test will also indicate any failure in the freezer thermistor. PASS RESULT –... -
Page 41: Service Test 152 - Freezer Door State
321023 REFRIGERATOR DOOR IS CLOSED 8.1.4.9 Service Test 152 - Freezer Door State. When selected, the refrigerator display will show the state of the freezer door. FREEZER DOOR IS OPEN FREEZER DOOR IS CLOSED • During this test, the freezer door switch must be closed. During these service mode tests, all dispenser keypad LEDs should be off. -
Page 42: Service Test 162 - Crush Dispense Test
321023 8.1.4.11 Service Test 162 - Crush Dispense Test. This test is used to test the crushed ice function. When selected, the refrigerator display will show “Off” when the actuator is not activated. When the actuator is pressed, the refrigerator display will show “On”. -
Page 43: Service Test 165 - Dispenser Light Test
321023 8.1.4.14 Service Test 165 - Dispenser Light Test. This test is used to test the dispenser light. When selected, the refrigerator display will show “Off” when the actuator is not activated. When the actuator is pressed, the refrigerator display will show “On”. -
Page 44: Service Test 173 - Ambient Light Test
321023 8.1.4.17 Service Test 173 - Ambient Light Test. This test is used to test the Auto Light feature. When selected, the refrigerator display will show “Lo” or “hi” depending on the ambient light sensed by the light sensor. A service technician should evaluate the proper operation of the ambient light by covering the light sensor for approximately 10 seconds and verify a “Lo”... -
Page 45: Service Test 181 - Keypad Operation Test
321023 ACTUATOR/FRONT FILL IS ACTIVE (DISP INPUT IS ACTIVE) 8.1.4.20 Service Test 181 - Keypad Operation Test. This test is used to verify all the keypads on the display keypad and the fountain keypad (if available). The Refrigerator Up/Down, Freezer Up/Down, and Front Fill keypads are excluded from this test. A service technician should press any membrane keypad on the display or fountain and verify the keypad feature on the refrigerator display. -
Page 46: Service Test 182 - Indicator Operation Test
321023 8.1.4.21 Service Test 182 - Indicator Operation Test. This test is used to verify all the LEDs on the Fountain and Display panels. When this test is activated using the Refrigerator Temperature Up/Down keypads , all the LEDs will flash. 8.1.4.22 Service Test 191 - Valve State Test. -
Page 47: Thermistor Reference Chart
321023 8.1.4.26 Thermistor Reference Chart 8.1.5 Show Room Mode Enter or exit the Show Room Mode by performing the following sequence of events: Open the fresh food compartment door and press and hold the DOOR ALARM keypad. Press and hold the FREEZER TEMPERATURE UP keypad. Release the DOOR ALARM keypad and wait 3 seconds. -
Page 48: Fahrenheit Or Celsius Mode
321023 8.1.7 Fahrenheit or Celsius Mode Enter the Fahrenheit or Celsius Mode by performing the following sequence of events: Open the fresh food compartment door and press and hold the DOOR ALARM keypad for 6 seconds. Press the FREEZER TEMPERATURE UP keypad until “F_C” is in the freezer display. Press the FRESH FOOD COMPARTMENT TEMPERATURE UP keypad or the FRESH FOOD COMPARTMENT TEMPERATURE DOWN keypad to toggle between “... -
Page 49: Filter Status Light Reset
321023 8.1.12 Filter Status Light Reset Once the filter light turns red, it remains red until reset. To reset the filter indicator, press both the DISPENSER LOCK and WATER keypads simultaneously and hold for 4 seconds. Make sure the green light flashes 3 times when the indicator resets. -
Page 50: Troubleshooting Flow Chart (Rx256Dt7X1)
321023 Troubleshooting Flow Chart (RX256DT7X1) 8.2.1 Compressor Does Not Turn On Use Service Test 102 to turn compressor on. compressor warm and running? Make sure Has the connector J3 is program code Program the properly been entered into control board. the control connected on the board? -
Page 51: Evaporator Fan Does Not Turn On
321023 8.2.2 Evaporator Fan Does Not Turn On Use Service Test 112 to turn evaporator fan on. Replace HV box Does the fan assembly run? 12872238. Does RF display read a number > 11? Ensure connector Check continuity J3 is properly of FZ liner harness Is the problem Done. -
Page 52: Damper Does Not Move
321023 8.2.3 Damper Does Not Move Use Service Test 121 to open the damper. Make sure Replace HV box connector J3 is Does the assembly properly damper move? 12872238. connected on the main board. While Service Test 121 is displaying OPEN for damper Is there line state, measure... -
Page 53: Damper Opens And Never Closes
321023 8.2.4 Damper Opens and Never Closes Is damper wired correctly? Use Service Test 121 to close the damper. Does the Measure voltage Use Service Test damper move to from pin 4 and pin 121 to open the the closed 9 on J3. -
Page 54: Flashing Display At Power Up
321023 8.2.5 Flashing Display at Power Up Enter Service Test mode. Run service test 101. Does the Replace the Replace the Run service test RF display show defrost heater. defrost harness. 141. OP or SH? Is display still flashing? Replace PC Does the Done. -
Page 55: Blank Display
321023 8.2.6 Blank Display Check that the harness is properly connected to the display board. Check that J4 is properly connected to the main control board. Measure voltage across pin 1 on J4 and pin 3 on main display board. Replace HV box Replace main Does it... -
Page 56: Mid Electronic Specification Control Board (Rx256Dt4X1, Rx256Et2B1, Rx256Et2W1)
321023 Electronic Specification Control Board (RX256DT4X1, RX256ET2B1, RX256ET2W1) 8.3.1 Programming Mode A manual method of entering program code is available for use when replacing controls in the field for repair. Improper use of this feature may result in performance problems. Great care should be exercised when setting program codes. -
Page 57: Forced Defrost Mode
321023 8.3.2 Forced Defrost Mode A manual method to force defrosts for use in testing and production is provided. This mode can be used to force an immediate defrost followed by either a short period (8 - 12 hours) or a long period (> 72 hours) to the next defrost. -
Page 58: Service Test Mode
321023 8.3.3 Service Test Mode There are several test modes available through the diagnostic system. Use of these test modes can greatly decrease the time needed for troubleshooting. It is to the technician’s advantage to be able to perform many tests in a very short period of time. Entering Service Test Mode. -
Page 59: Service Test 1 - Defrost Thermostat & Defrost Circuit Test
321023 8.3.4.1 Service Test 1 – Defrost Thermostat & Defrost Circuit Test. When selected, this test will display the state of the defrost thermostat. In order to perform this test, the defrost heater will be energized. • The test is activated and deactivated using the Refrigerator Temperature U p keypad Once activated, this test must be de-activated to move to another test number. -
Page 60: Service Test 4 - Refrigerator Thermistor Test
321023 8.3.4.4 Service Test 4 - Refrigerator Thermistor Test. When selected and activated, this test will display Pass, Open, Short result for a test on the refrigerator thermistor circuit as show below. • The test is activated via the Refrigerator Temperature Up keypad , and must be de- activated to move to another test selection. -
Page 61: Service Test 6 - Open Damper Test
321023 8.3.4.6 Service Test 6 - Open Damper Test. When selected, this test will indicate the current position "0"/"C" (OPEN/CLOSED) of the refrigerator damper. • The Refrigerator Temperature Up keypad will toggle the damper open and closed. The technician must allow 1 minute for each attempt to change the damper position. The technician should observer proper damper function. -
Page 62: Service Test 8 - Freezer Performance Adjustment
321023 8.3.4.8 Service Test 8 - Freezer Performance Adjustment. This test will allow the service technician to adjust the control performance points. Each step will incrementally change the freezer performance warmer (towards 1) or colder towards (9) as adjusted. The default value is 5. •... -
Page 63: Troubleshooting Flow Chart (Rx256Dt4X1, Rx256Et2B1, Rx256Et2W1)
321023 Troubleshooting Flow Chart (RX256DT4X1, RX256ET2B1, RX256ET2W1) 8.4.1 Compressor Does Not Turn On Use Service Test 2 to turn compressor on. Does the compressor warm and condenser fan running? run? Using wiring diagram (refer ?) check continuity of display Make sure Has the harness, control harness, FZ connector J1 is... -
Page 64: Evaporator Fan Does Not Turn On
321023 8.4.2 Evaporator Fan Does Not Turn On Use Service Test 3 to turn evaporator fan on. Does the fan run? Make sure connector J2 is properly connected on the control board. Using wiring diagram (refer ?) Turn fan on using check continuity of Service Test 3 &... -
Page 65: Damper Does Not Move
321023 8.4.3 Damper Does Not Move Use Service Test 6 to open the damper. Make sure connector J2 is Does the Replace control properly damper move? board 12784415P. connected on the control board. Measure voltage Is there line from pin 6 on J2 to voltage? pin 6 on J1. -
Page 66: Damper Opens And Never Closes
321023 8.4.4 Damper Opens and Never Closes Is damper wired correctly? Use Service Test 6 to close the damper. Does the Measure voltage Use Service Test damper move to from pin 7 on J2 to 6 to open the the closed pin 6 on J1. -
Page 67: Flashing Display At Power Up
321023 8.4.5 Flashing Display at Power Up Enter Service Test mode. Run service test 1. Does the Replace the Replace the Run service test 4. RF display show defrost heater. defrost harness. O or S? Does the O or S Done. -
Page 68: Blank Display
321023 8.4.6 Blank Display Does the Reconnect all wiring unit have power? harnesses, plug unit in, Apply power to unit. (lights, compressor, and check display for etc). desired result. Remove dispenser display control board making sure to unhook both wiring harnesses. With the REF door open, check voltage across RED &... -
Page 69: Defrost Cycle
321023 Defrost Cycle The following table outlines the defrost cycle of the refrigerator. Adaptive Defrost Cycle of the Refrigerator COMPRESSOR DEFROST ELEMENT DEFROST ELEMENT COMPRESSOR FAN TURNS OFF TURNS ON TURNS OFF TURNS ON TURNS ON 30 MINUTE SUB COOLING RUN 4 MINUTES DEFROST TIME;... -
Page 70: Electronic Troubleshooting
321023 ELECTRONIC TROUBLESHOOTING Models RX256DTX1, RX256ET2B1, RX256ET2W1 Table A: Harness 10-pin Connector Configuration Colour Signal Crushed Cubed Dispenser Light Water Valve Line Out Main Actuator Ice Door Chute Solenoid Line In Neutral Note: All voltage measurements are referenced to line neutral or pin 1 (WH wire) of 10-pin connector. Symptom Possible Cause Test Procedure... - Page 71 321023 Symptom Possible Cause Test Procedure Repair Water starts to Failed main Disconnect power. Remove both leads from the Replace switch. dispense as soon dispenser switch switch and measure resistance across switch as Water Mode is (failed short) terminals. Resistance should read less than 1 Ω selected without in this position and higher than 10 MΩ...
- Page 72 321023 Symptom Possible Cause Test Procedure Repair No LED lit, Water Failed PCB. Replace PCB. dispenser operates, auger motor operates only in Ice Mode and ice chute door does not open or remains open. No LED lit, Water Failed PCB. Replace PCB.
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Page 73: General Troubleshooting
321023 GENERAL TROUBLESHOOTING This troubleshooting chart on the following pages contains symptoms that may be seen in malfunctioning units. Each symptom is accompanied by one or more possible causes and by a possible remedy or test to determine if components are working properly. Symptom Possible Causes Corrective Action... - Page 74 321023 Symptom Possible Causes Corrective Action Unit runs continuously. Temperature control set too cold. Adjust temperature control. Dirty condenser or obstructed grille. Check condenser and grille. Clean. Poor door seal. Level cabinet. Adjust hinges. Replace gasket. Interior light remains on. Check switch.
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Page 75: Disassembly Procedures
321023 DISASSEMBLY PROCEDURES 11.1 Fresh Food Compartment 11.1.1 Light Switch Use a taped putty knife to carefully pry the light switch out of the liner. When the light switch is free of the compartment liner, remove the wires from the light switch. Remove the light switch from the unit. - Page 76 321023 Ice & Water Dispensing Board...
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Page 77: Main Control Board (Full Electronic Specification Model (Rx256Dt7X1))
321023 11.1.4 Main Control Board (Full Electronic Specification Model (RX256DT7X1)) Located at the rear of the cabinet alongside the compressor. Main Control Board 11.1.5 Electronic Control (Mid Electronic Specification Models (RX256DT4X1, RX256ET2B1, RX256ET2W1)) Remove the hex head screws holding the control to the cabinet. Unplug the connectors from the cabinet harness and remove the control assembly. - Page 78 321023 Mid Electronic Specification Control (RX256DT4X1, RX256ET2B1, RX256ET2W1)
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Page 79: Electronically Controlled Damper
321023 Mid Electronic Specification Control Panel (RX256DT4X1, RX256ET2B1, RX256ET2W1) 11.1.6 Electronically Controlled Damper Remove the damper cover by removing the hex head screw and lifting off the damper. Remove the foam insert by pulling it off the damper control. Depress the two clips that hold the front of the damper in place to release the damper from the assembly. -
Page 80: Crisper Light Cover And Socket
321023 11.1.10 Crisper Light Cover and Socket Push down and forward on the light cover and lift off the tabs. Remove the light bulb and pry the socket with a taped putty knife to release the socket from the liner. Disconnect the wires from the socket. -
Page 81: Evaporator Fan Motor And Fan Blade
321023 11.2.6 Evaporator Fan Motor and Fan Blade Remove the evaporator fan motor assembly (refer to Section 11.2.5). Remove the evaporator fan blade by pulling the blade off the evaporator fan shaft. Remove the fan motor by squeezing the motor retainer clips together to release the retainer. Remove the retainer and slide the motor out. - Page 82 321023 Replace the terminator and use wire nut(s) included in the defrost terminator kit. Reverse the procedure to reassemble. Ensure the thermostat is fitted to the suction line.
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Page 83: Defrost Heater
321023 11.2.10 Defrost Heater Remove all freezer shelving. Remove the lower evaporator cover hex head screws. Remove the evaporator cover. Grasp the evaporator by the left side to release the coil from the retainer clips. Turn the evaporator slightly to expose the heater leads. Disconnect the heater leads from the harness. -
Page 84: Condenser Fan Motor And Blade
321023 11.3.2 Condenser Fan Motor and Blade Remove the machine compartment hex screws. Remove the cover. Disconnect the wiring harness connector from the condenser motor. Remove the hex screws from the mounting brackets attached to the motor. Remove the motor and fan blade out the rear of the shroud. Remove the retainer nut to remove the fan blade. -
Page 85: Condenser Removal
321023 11.3.7 Condenser Removal NOTE: The condenser is removed by laying the unit on its back, and requires at least two people to carry out this procedure. Remove the machine compartment hex screws. Remove the cover. Remove the condenser fan motor and shroud. Disconnect the harness plug connecting the machine compartment to the cabinet. -
Page 86: Dispenser Ice Chute Door
321023 11.5.3 Dispenser Ice Chute Door Remove the dispenser façade (refer to Section 11.5.2). Remove the ice chute assembly (refer to Section 11.5.5). After the ice chute assembly is removed, unsnap the ice chute dispenser door from the assembly. Retain the spring if good, replace if bad. Remove the rubber seal from the door and replace if bad. -
Page 87: Sealed System Diagnosis
321023 SEALED SYSTEM DIAGNOSIS CONDITION Suction Head T1 inlet T2 outlet T3 suction Wattage pressure pressure temperature temperature temperature variation variation variation variation from variation from variation from from from from normal normal normal normal normal normal Increase Increase Warmer Warmer Colder Increase... -
Page 88: Symptoms Of A Restriction
321023 • Depending on the amount of the shortage, the condenser will not be hot, but closer to room temperature. The capillary tube will be warmer than normal from a slight shortage. • If the leak is on the high side of the system, both gauges will show lower than normal readings and will show progressively lower readings as this charge becomes less. - Page 89 321023 if the unit performs as it previously did, you may have a restricted capillary line or condenser or kinked line. Find the point of restriction and correct it. A restriction reduces the flow rate of the refrigerant and consequently reduces the rate of heat removal.
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Page 90: Symptoms Of Air In System
321023 As far as pressure readings are concerned, if the restriction, such as a kinked line or a joint soldered shut is anywhere on the low side, the suction pressure would probably be in a vacuum while the head pressure will be near normal. If the restriction is on the high side, the suction pressure, again, will probably be in a vacuum while the head pressure will be higher than normal during the pump out period described earlier. - Page 91 321023 An increase in heat being absorbed by the refrigerant in the evaporator will affect the temperature and pressure of the gas returning to the compressor. Compartment temperatures, power consumption, discharge, and suction pressures are all affected by heat load. Pressures will be higher than normal under heavy heat load.
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Page 92: Sealed System Service Procedures
321023 SEALED SYSTEM SERVICE PROCEDURES 13.1 Service Equipment Listed below is equipment needed for proper servicing of HFC134a systems. Verify equipment is confirmed by manufacturer as being compatible with H FC134a and ester oil system. Equipment must be exclusively used for HFC134a. Exclusive use of equipment only applies to italic items. - Page 93 321023 Remove drier. Apply heat trap paste on post condenser tubes to protect grommets from high heat. Unbraze remaining part of drier. Remove drier from system. Discard drier in safe place. Do not leave drier with customer. If refrigerator is under warranty, old drier must accompany warranty claim.
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Page 94: Refrigerant Precautions
321023 13.3 Refrigerant Precautions WARNING To avoid risk of personal injury, do not allow refrigerant to contact eyes or skin. CAUTION To avoid risk of property damage, do not use refrigerant other than as shown on unit serial number identification plate. NOTE: All precautionary measures recommended by refrigerant manufacturers and suppliers apply and should be observed. -
Page 95: Dehydrating Sealed Refrigeration System
321023 NOTE: Ensure test cord cables and fuses meet specifications for unit under test (see Technical Sheet for unit under test). Replace compressor protector cover securely. Plug test cord into outlet, then press and release start cord switch. CAUTION To avoid risk of damage to compressor windings, immediately disconnect (unplug) test cord from power source if compressor does not start. - Page 96 321023 2. Open valves on nitrogen cylinder and gauge manifold. Allow pressure to build within sealed system. 3. Check for leaks using leak detection fluid. If a leak is detected in a joint, do not to attempt to repair by applying additional brazing material. Joint must be disassembled, cleaned and rebrazed.
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Page 97: Restrictions
321023 13.9 Restrictions 13.9.1 Symptoms Restrictions in sealed system most often occur at capillary tube or filter drier, but can exist anywhere on liquid side of system. Restrictions reduce refrigerant flow rate and heat removal rate. Wattage drops because compressor is not circulating normal amount of refrigerants. -
Page 98: Evacuation And Charging
321023 Remove and replace restricted device. Evacuate sealed system. Charge system to specification. NOTE: Do not use captured or recycled refrigerant in units. Captured or recycled refrigerant voids any compressor manufacturer's warranty. NOTE: Charge system with exact amount of refrigerant. Refer to unit serial plate for correct refrigerant charge. - Page 99 321023 After compound gauge (low side) drops to approximately 29 inches gauge, open valve “C” to vacuum thermocouple gauge and take micron reading. NOTE: A high vacuum pump can only produce a good vacuum if oil in pump is not contaminated. Continue evacuating system until vacuum gauge registers 600 microns.
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Page 100: Charging
321023 At 600 microns, close valve “A” to vacuum pump and allow micron reading in system to balance. Micron level will rise. • If in 2 minutes, micron level stabilizes at 1000 microns or below, system is ready to be charged. •... -
Page 101: Health, Safety, And Handling
321023 13.10.5 Health, Safety, and Handling Health, safety and handling considerations for HFC134A are virtually no different than those for older CFC12/R12. CAUTION To minimize contamination, exercise extreme care when servicing HFC134A sealed systems. • No trace of other refrigerants is allowed in HFC134a systems. Chlorinated molecules in other refrigerants such as CFC12, etc. - Page 102 321023 • Avoid system contamination by using Towerdraw E610 evaporating oil when flaring, swagging, or cutting refrigeration tubing.
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Page 103: Replacement Service Compressor
321023 13.11 Replacement Service Compressor HFC134a service compressors will be charged with ester oil and pressurized with dry nitrogen. Before replacement compressor is installed, pull out 1 rubber plug. A pop from pressure release should be heard. If a pop sound is not heard, do not use compressor. Positive pressure in compressor is vital to keep moisture out of ester oil. -
Page 104: Wiring Diagrams
321023 WIRING DIAGRAMS 14.1 Wiring Schematic (RX256DT7X1) -
Page 105: Wiring Diagram (Rx256Dt7X1)
321023 14.2 Wiring Diagram (RX256DT7X1) -
Page 106: Wiring Schematic (Rx256Dt4X1, Rx256Et2B1, Rx256Et2W1)
321023 14.3 Wiring Schematic (RX256DT4X1, RX256ET2B1, RX256ET2W1) -
Page 107: Wiring Diagram (Rx256Dt4X1, Rx256Et2B1, Rx256Et2W1)
321023 14.4 Wiring Diagram (RX256DT4X1, RX256ET2B1, RX256ET2W1) - Page 108 321023 NOTES...
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