Fisher & Paykel RX256DT4X1 Service Manual Download Page 38 | Manualshive

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321023

38

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" and

"Off".

OBSERVE COMPRESSOR & CONDENSER FAN FUNCTION

8.1.4.4

Service Test 112 - Freezer Fan Operation.

When selected and activated, this test will operate the freezer fan (evaporator fan). The Refrigerator
Temperature Up /Down keypads

/

will toggle the fan drive circuit between on and off. The

technician will have to inspect the fan for proper function.

•

The refrigerator display will show the voltage level supplied to the fan. When on, the refrigerator
display will show a voltage reading between 11.0 to 14.0 volts. When off, the refrigerator display
will show a voltage reading of 0.0 volts.

EVAPORATOR FAN IS OFF

EVAPORATOR FAN IS ON

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Summary of Contents for RX256DT4X1

Page 1: ...321023 Service Manual Side by Side Refrigerator Fisher Paykel Models RX256DT4X1 FP RX256DT7X1 FP Elba Models RX256ET2B1 EL RX256ET2W1 EL...

Page 2: ...isherpaykel com Fisher Paykel Appliances Canada Inc 2900 595 Burrard Street Vancouver BC V7X 1J5 Canada Telephone 888 936 7872 E mail customer care fisherpaykel com COPYRIGHT FISHER PAYKEL LTD 2008 AL...

Page 3: ...ol Settings 20 5 3 Speed Ice 20 5 4 Reset Filter Selected Models 21 5 5 Vacation Mode 21 5 6 Temp Alarm 21 5 7 Door Alarm 21 5 8 Max Cool 21 5 9 User Preferences 22 5 9 1 Super Cool CC Selected Models...

Page 4: ...171 Actuator Pad Test 43 8 1 4 16 Service Test 172 Sports Fill Test 43 8 1 4 17 Service Test 173 Ambient Light Test 44 8 1 4 18 Service Test 174 Dispenser Water Actuator Bottom Mount units only 44 8 1...

Page 5: ...TROUBLESHOOTING 73 11 DISASSEMBLY PROCEDURES 75 11 1 Fresh Food Compartment 75 11 1 1 Light Switch 75 11 1 2 Electronic Control Full Electronic Specification Model RX256DT7X1 75 11 1 3 Ice And Water D...

Page 6: ...ment 92 13 3 Refrigerant Precautions 94 13 4 Line Piercing Valves 94 13 5 Open Lines 94 13 6 Compressor Operational Test 94 13 7 Dehydrating Sealed Refrigeration System 95 13 8 Leak Testing 95 13 8 1...

Page 7: ...E BEGINNING REPAIRS WARNING To avoid risk of electrical shock personal injury or death disconnect electrical power source to unit before working on servicing the appliance To locate an Authorised Serv...

Page 8: ...end opposite shaft Clockwise RPM 1120 RPM Watts 3 4 watts 15 115 VAC Current 0 085 amps 15 115 VAC Evaporator Fan Motor Rotation facing end opposite shaft Clockwise RPM 2800 RPM Watts 6 0 watts 15 11...

Page 9: ...ps to prevent condensation around the freezer compartment opening and through the molecular sieve drier and into the capillary tube The small inside diameter of the capillary offers resistance decreas...

Page 10: ...al 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...

Page 11: ...321023 11 2 3 Refrigerant Flow...

Page 12: ...321023 12 2 4 Cabinet Air Flow...

Page 13: ...321023 13 2 5 Ice And Water Dispenser Diagram...

Page 14: ...321023 14 2 6 Water Valve Diagram...

Page 15: ...321023 15 2 7 Typical External Sweat Pattern...

Page 16: ...321023 16 3 INSTALLATION...

Page 17: ...321023 17...

Page 18: ...321023 18...

Page 19: ...d of the filter and insert the filter into the filter head Rotate gently clockwise until the filter stops Snap the filter cover closed Reduce water spurts by flushing air from the system Run water con...

Page 20: ...ial Control Settings Pressing the TEMPERATURE UP or TEMPERATURE DOWN keypads adjust the controls to the desired setting Set the freezer control to 4 Set the fresh food compartment control to 4 Let the...

Page 21: ...ower outage or other event When activated the TEMP ALARM light will illuminate If the freezer or fresh food temperatures have exceeded these limits the display will alternately show the current compar...

Page 22: ...seconds OR close the fresh food compartment door and any change will be saved 5 9 1 Super Cool CC Selected Models When Super Cool is ON an air mixing fan in the fresh food compartment is activated to...

Page 23: ...321023 23 6 ICE AND WATER 6 1 Dispenser Features Selected Models Full Electronic Specification Dispenser Panel Mid Electronic Specification Dispenser Panel Elba Dispenser Panel...

Page 24: ...TION To aviod personal injury or property damage observe the following Do not put fingers hands or any foreign object into the dispenser opening Do not use sharp objects to break ice Do not dispense i...

Page 25: ...r Status Indicator Light Selected Models The Water Status Indicator Light serves as a reminder to replace the water filter A green light indicates that the filter is in good condition A red light indi...

Page 26: ...ivate during dispensing while in this mode If the power fails the control remains in Sabbath Mode when the power is restored 6 2 7 Front Fill Selected Models The Front Fill keypad works independently...

Page 27: ...nd use an ohmmeter set on highest scale 4 Touch one lead to compressor body clean point of contact and other probe to each compressor terminal If reading is obtained compressor is grounded and must be...

Page 28: ...ow over condenser is maintained Condenser is air cooled by condenser fan motor If efficiency of heat transfer from condenser to surrounding air is impaired condensing temperature becomes higher High l...

Page 29: ...ser fan moves cooling air across condenser coil and compressor body Condenser fan motor is in parallel circuit with compressor Check resistance across coil Evaporator fan motor Evaporator fan moves ai...

Page 30: ...m high heat 8 Unbraze remaining part of drier Remove drier from system 9 Discard drier in safe place Do not leave drier with customer If refrigerator is under warranty old drier must accompany warrant...

Page 31: ...cuit through heater Check resistance across heater To check defrost system 1 Thermocouple defrost thermostat and plug refrigerator into wattmeter 2 Turn into Forced Defrost Mode Wattmeter should read...

Page 32: ...and defrost heater is carried out by this board via relays mounted on the board Refer to specific the Technical Data Sheet supplied with the unit for troubleshooting procedures Mid electronic specific...

Page 33: ...fresh food compartment and the other being the dispenser board using a capacitive power supply mounted in the front of the freezer door This results in a less number of feature buttons available for t...

Page 34: ...once more The control will display the current program code i e program code 1510 shown here This value should be validated with the program code printed on the unit serial plate If the program code...

Page 35: ...the Refrigerator Temperature Down keypad to confirm The display will flash and begin defrost Trip the light switch or press any keypad on the keypad to return to temperature display 8 1 3 Service Test...

Page 36: ...is error code indicates that the control s main board is defective Replacing the main board would be the first step to troubleshoot this problem Error Code 2 This error code indicates a failure of 12v...

Page 37: ...Main Control Boards Error Code 10 This error indicates an evaporator fan failure because of low output voltage refer to Section 9 2 5 for troubleshooting Possible defective main control board Error Co...

Page 38: ...COMPRESSOR CONDENSER FAN FUNCTION 8 1 4 4 Service Test 112 Freezer Fan Operation When selected and activated this test will operate the freezer fan evaporator fan The Refrigerator Temperature Up Down...

Page 39: ...inute delay the refrigerator display will show will show a symbol before the position state to indicate that the damper has not reached that state yet DAMPER IS IN THE OPEN POSITION DAMPER IS IN THE C...

Page 40: ...hermistor is shorted 8 1 4 8 Service Test 143 Ambient Thermistor Test See Thermistor Chart in Section 8 1 13 When selected and activated the refrigerator display will show the temperature reading in t...

Page 41: ...uring these service mode tests all dispenser keypad LEDs should be off 8 1 4 10 Service Test 161 Cube Dispense Test This test is used to test the cubed ice function When selected the refrigerator disp...

Page 42: ...n the actuator or Sports Fill are pressed the refrigerator display will show On A service technician should evaluate proper operation of the dispenser by pressing the actuator Also evaluating the prop...

Page 43: ...CTUATOR IS ACTIVE DISPENSER LIGHT IS ON 8 1 4 15 Service Test 171 Actuator Pad Test This test is used to test the actuator pad When selected the refrigerator display will show Off when the actuator is...

Page 44: ...hen selected the refrigerator display will show Off when the actuator is not activated When the actuator is pressed the refrigerator display will show On A service technician should evaluate proper op...

Page 45: ...this test A service technician should press any membrane keypad on the display or fountain and verify the keypad feature on the refrigerator display NOTE The feature keypads on the display will show a...

Page 46: ...us of the water valve WATER VALVE IS OFF WATER VALVE IS ON 8 1 4 23 Service Test 241 Main Control Software This test will display the software revision for the main control board 8 1 4 24 Service Test...

Page 47: ...D COMPARTMENT TEMPERATURE DOWN keypad to toggle the showroom feature on or off NOTE Show Room Mode will always be off when first entered 6 Press the FREEZER TEMPERATURE UP keypad to confirm the settin...

Page 48: ...MPERATURE DOWN keypad to toggle between ON and OFF in the fresh food compartment display 4 Close the door or toggle the door switch to activate the selection 8 1 10 Light Level Mode Enter the Light Le...

Page 49: ...r 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 8 1 13 Thermistor Resistance Chart TEMPERATU...

Page 50: ...compressor on Make sure connector J3 is properly connected on the main board Is compressor warm and running Compressor relay circuit may be defective Program the control board Replace HV box assembly...

Page 51: ...rvice Test 112 to turn evaporator fan on Does the fan run Replace HV box assembly 12872238 Does RF display read a number 11 Ensure connector J3 is properly connected to the main control board Check co...

Page 52: ...connected on the main board Is there line voltage While Service Test 121 is displaying OPEN for damper state measure voltage across pin 3 and pin 9 on J3 connector Check continuity of FZ liner harness...

Page 53: ...amper close Measure voltage from pin 4 and pin 9 on J3 Check continuity of FZ liner harness and HV PCB harness Replace as necessary Use Service Test 121 to open the damper Replace damper Exit service...

Page 54: ...Run service test 101 Check all connections on main control board Run service test 141 Is display still flashing Run service test 142 Done Replace the defrost heater Replace PC thermistor harness Repla...

Page 55: ...rly connected to the display board Does it read 12v DC No 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 main...

Page 56: ...into the program code programming mode Entry is confirmed by pressing the Freezer Temperature Down keypad once more The control will display the current program code i e program code 25 shown here Thi...

Page 57: ...he control will display Fd to confirm entry into the Forced Defrost Mode Entry is confirmed by pressing the Refrigerator Temperature Down keypad once more The unit is off and in the Defrost Mode NOTE...

Page 58: ...ode Entry to the Service Menu is confirmed by pressing the Refrigerator Temperature Up keypad once more The control will display its software version for 3 seconds i e Revision 25 shown here Following...

Page 59: ...st 2 Compressor Condenser Fan Test When selected and activated this test will operate the compressor condenser fan circuit A service technician should evaluate proper operation of the compressor and c...

Page 60: ...emperature Up keypad and must be de activated to move to another test selection PASS RESULT OPEN RESULT SHORT RESULT 8 3 4 5 Service Test 5 Freezer Thermistor Test When selected this test will display...

Page 61: ...VE DAMPER FUNCTION 8 3 4 7 Service Test 7 Refrigerator Performance Adjustment This test will allow the service technician to adjust the control performance points Each step will incrementally change t...

Page 62: ...will operate normally but all all of the cooling and air moving devices will remain off The unit will remain in Show Room Mode until power is removed from the unit The Show Room Mode is set using the...

Page 63: ...faulty harness Yes Is there line voltage Use Service Test 2 to turn compressor on Make sure connector J1 is properly connected on the board Is compressor warm and running Compressor relay circuit may...

Page 64: ...un Make sure connector J2 is properly connected on the control board Is there line voltage Turn fan on using Service Test 3 measure voltage from pin 8 on J2 to pin 6 on J1 Using wiring diagram refer c...

Page 65: ...or J2 is properly connected on the control board Is there line voltage Measure voltage from pin 6 on J2 to pin 6 on J1 Using wiring diagram refer check continuity of display harness and control harnes...

Page 66: ...oltage from pin 7 on J2 to pin 6 on J1 Using wiring diagram refer check continuity of display harness control harness and FZ liner Replace faulty harness Use Service Test 6 to open the damper Replace...

Page 67: ...how P O or S Replace the defrost harness Recycle power on refrigerator Run service test 1 Replace control board 12784415P Run service test 4 Is display still flashing Run service test 5 Done Replace t...

Page 68: ...ss RED WHITE wires on FZ liner harness Does the multimeter read the correct voltage Remove MC back and unplug 9 pin connection between MC harness FZ liner harness Check voltage across RED WHITE wires...

Page 69: ...ELEMENT COMPRESSOR FAN TURNS OFF TURNS ON TURNS OFF TURNS ON TURNS ON 30 MINUTE SUB COOLING RUN 4 MINUTES DEFROST TIME 4 MINUTES 30 SECONDS TARGET IS 15 MINUTES MAXIMUM IS 25 MINUTES BACK TO NORMAL RU...

Page 70: ...pen connection switch is pressed in Water Crush or Ice Mode Failed light bulb or PCB With unit powered press the Main dispenser switch Measure voltage on pin 8 BR wire of 10 pin connector Voltage shou...

Page 71: ...from the switch and measure resistance across switch terminals Resistance should read higher than 10 M when switch is open and less than 1 when switch is closed Replace switch Failed PCB With PCB powe...

Page 72: ...th PCB powered press the Main dispenser switch Measure voltage on pin 10 BU wire of 10 pin connector Voltage should read 120VAC Replace auger motor if voltage reads 120VAC If not replace PCB Crushed i...

Page 73: ...mpartment too warm Excessive door opening Consumer education Overloading of shelves Consumer education Warm or hot foods placed in cabinet Consumer education Cold control set too warm Set control to c...

Page 74: ...ets worn or missing Mounting hardware loose or missing Tighten hardware Replace grommets if necessary Free or loose parts causing or allowing noise during operation Inspect unit for parts that may hav...

Page 75: ...ly 3 Remove the cover of the board by squeezing the tabs on the cover to release the cover from the assembly to expose the electronic control 4 Unplug the wires from the electronic control board and u...

Page 76: ...321023 76 Ice Water Dispensing Board...

Page 77: ...Models RX256DT4X1 RX256ET2B1 RX256ET2W1 1 Remove the hex head screws holding the control to the cabinet 2 Unplug the connectors from the cabinet harness and remove the control assembly 3 Remove the co...

Page 78: ...321023 78 Mid Electronic Specification Control RX256DT4X1 RX256ET2B1 RX256ET2W1...

Page 79: ...needs to be disconnected from the water valves in the machine compartment refer to Section 11 3 1 4 After the tubing is disconnected from the water valves pull the filter head and tubing out the fron...

Page 80: ...side of the cover 4 Lift and slide the assembly toward the front Disconnect the wiring harness and remove the assembly 11 2 3 Auger Motor 1 Remove the auger drive hex nut 2 Remove the three hex nuts h...

Page 81: ...or and remove the thermistor 11 2 8 Evaporator Removal NOTE Reclaim the refrigerant per instructions in Service Procedures before attempting evaporator removal To avoid system contamination do not lea...

Page 82: ...321023 82 7 Replace the terminator and use wire nut s included in the defrost terminator kit 8 Reverse the procedure to reassemble 9 Ensure the thermostat is fitted to the suction line...

Page 83: ...bucket 2 Disconnect the icemaker harness from the rear bulkhead 3 Remove the front two screws from the left ice bucket rail 4 Remove the screws supporting the icemaker from the side bulkhead 5 Remove...

Page 84: ...ws 2 Remove the cover 3 Locate and remove the hex screw holding the drain tube in place 4 Remove the drain tube by pulling down on the tube 5 Reverse the procedure to reassemble 11 3 5 Condensate Drai...

Page 85: ...up 75mm off the floor 3 Screw the front leveller bolts until they are loose from the levelling roller 4 Slide the levelling roller out the rear of the slot to remove the roller 5 Reverse the procedure...

Page 86: ...3 Remove the water tube from the assembly collar 4 Remove the wires from the dispenser light socket 5 Disconnect the ground wire from the solenoid assembly 6 Disconnect the wires from the D C solenoid...

Page 87: ...ure Higher than normal wattage Evaporator inlet and outlet temperatures warmer than normal Suction tube temperature below ambient Always check for separated heat exchanger when suction temperature is...

Page 88: ...tage of refrigerant the capillary line will not have a full column of liquid As a result there is a noticeable hissing sound in the evaporator This should not be mistaken for the regular refrigerant b...

Page 89: ...low rate of the refrigerant and consequently reduces the rate of heat removal Complete restriction may be caused by moisture solid contaminants in the system or a poorly soldered joint Moisture freeze...

Page 90: ...replace drier evacuate and recharge with the specified refrigerant charge 12 5 Symptoms of Low or High Ambient Temperature Installation Lower ambient air temperature reduces the condensing temperature...

Page 91: ...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 l...

Page 92: ...HFC134a are smaller than other refrigerants and will leak where other refrigerants would not Swagging tools Flaring tools Tubing cutter Flux Sil Fos Silver solder Oil for swagging and flaring Copper t...

Page 93: ...post condenser tubes to protect grommets from high heat 6 Unbraze remaining part of drier Remove drier from system 7 Discard drier in safe place Do not leave drier with customer If refrigerator is und...

Page 94: ...ration system never leave lines open to atmosphere Open lines allow water vapour to enter system making proper evacuation more difficult 13 6 Compressor Operational Test Short term testing only If com...

Page 95: ...ids These acids contribute to breakdown of motor winding insulation and corrosion of compressor working parts causing compressor failure In addition sludge a residue of the chemical reaction coats all...

Page 96: ...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 Capture refrigerant charge if system is char...

Page 97: ...n higher than normal head pressure and wattage while low side is being pumped out 13 9 2 Testing for Restrictions To determine if a restriction exists 1 Attach gauge and manifold between suction and d...

Page 98: ...iciency greatly depends upon how completely air moisture and other non condensables are evacuated from sealed system Air in sealed system causes high condensing temperature and pressure resulting in i...

Page 99: ...proximately 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 6 Continue evacu...

Page 100: ...xact amount of refrigerant flow from cylinder into system Close valve Low side gauge pressure should rise shortly after opening charging cylinder valve as system pressure equalizes through capillary t...

Page 101: ...erformance is detected oil will be saturated with moisture CFC12 has much higher tolerance to system processing materials such as drawing compounds rust inhibitors and cleaning compounds than HFC134a...

Page 102: ...321023 102 Avoid system contamination by using Towerdraw E610 evaporating oil when flaring swagging or cutting refrigeration tubing...

Page 103: ...t during initial pull down Allow one off cycle or balanced temperature condition to occur before proceeding with testing Refrigerator must operate minimum of 20 minutes after thermocouples are install...

Page 104: ...321023 104 14 WIRING DIAGRAMS 14 1 Wiring Schematic RX256DT7X1...

Page 105: ...321023 105 14 2 Wiring Diagram RX256DT7X1...

Page 106: ...321023 106 14 3 Wiring Schematic RX256DT4X1 RX256ET2B1 RX256ET2W1...

Page 107: ...321023 107 14 4 Wiring Diagram RX256DT4X1 RX256ET2B1 RX256ET2W1...

Page 108: ...321023 108 NOTES...

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