XXL FDBM Dual Evaporator Refrigerator Airflow direction into ice storage compartment
Refrigerator Air Supply Tunnel
Ice Storage Compartment Airflow direction to ice storage compartment in refrigerator door
Refrigerator Compartment Evaporator behind Crisper Bins
Freezer Compartment Evaporator Ice Maker Compartment
Leveling
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Right Door Adjustment
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Refrigerator Compartment (RC)
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5
6
Model Number Tag
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Removing the Left RC Door Hinge
Remove Phillips head screw and hinge cover
X
X
Disconnect wire harness and water tube
Remove 2 black T-27 Torx AK12 36 IN. DUAL EVAPAPORATOR FRENCH DOOR
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Removing Ice Maker Fascia
Pull out bottom of fascia to disengage upper tabs
Insert wide blade into slots and twist
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Insulation and foil tape are used for reducing condensation 9
Removing the Reservoir cover
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Water Filter Switch New feedback switch located in filter housing
The filter switch position identifies when a filter is installed. When a new filter is installed, the change in switch position resets the software counter. Switch is open when filter is installed. Switch is closed with filter removed. Note: Use Diagnostic test 67 to check AK12 36 IN. DUAL EVAPAPORATOR FRENCH DOOR
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Removing the Reservoir Cover 4 Receptacles
4 Tabs
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Removing the Reservoir Cover –Cont.
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Reservoir Cover
If the cover is hard to install or doesn’t fit properly, check the tabs for damage.
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Frenchdoor Dual Evaporator Water Flow Schematic
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Frenchdoor Dual Evaporator Water Flow Schematic
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Removing the Ice Maker Assembly – Cont.
Disconnect the ice maker fill tube
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Removing the Ice Maker Assembly
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Removing the Ice Maker Assembly – Cont.
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Removing the Ice Maker Assembly – Cont
Drop down the front of the ice maker assembly and slide out to disengage the 2 tabs from the slots in the top of the cabinet.
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Removing the Ice Maker Assembly – Cont
Peel back fill tube heater to reveal hidden screw.
Remove 5 ¼” hex head screws
Remove foil heater
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Accessing the Ice Maker and Fan Motor
Remove the foam block
Lift off the cover
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Accessing the Ice Maker and Fan Motor Fill - 49 ML 10 Tablespoons
Lift out ice maker and disconnect the wire harness.
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Accessing the Ice Maker and Fan Motor
Lift out the fan and disconnect the wire harness
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Removing LED Module
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Accessing Water Reservoir and Valves
Remove 3 ¼ hex head screws
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Accessing Water Reservoir and Valves Disconnect the fill tube from the isolation valve connected to the filter head
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Accessing Water Reservoir and Valves – Cont. Drop the front of the housing and disengage the 3 rear tabs from the three slots in the top of the refrigerator cabinet.
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Accessing Water Reservoir and Valves –Cont.
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Water Reservoir Assembly Components Reservoir
Dual Water Valve
Filter Head
Filter Switch
Reservoir 1100 ML /37 OZ.
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Water Reservoir Assembly Components
Disconnect ¼” reservoir water tube from dual valve
Cut the 5 nylon wire ties and lift out reservoir
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Dual Water Valve
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Removing the Filter Switch Cover Depress tab and lift up on filter cover
Disengage the 2 tabs on opposite side of the cover
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Removing/Changing Filter Switch Depress release and push the switch through
Disconnect wires
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Removing the Air Tower
Release 6 locking, 2 tabs at 3 locations along the center shelf rail
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Removing the Air Tower Drop down the air tower and remove
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Removing RC Evaporator Cover
Remove 2 ¼” hex head screws
Remove RC evaporator cover
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RC Evaporator Components
Deli Air Damper
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RC Evaporator Fan motor
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RC Evaporator Thermistor
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Removing the Rail Caps There are 4 tabs securing the cap to the rail, 2 on the outside of the cap and two on the inside between the cap and the liner
Insert a wide straight blade between the cap and the rail approximately 1” from the bottom of the cap and twist. Repeat at the top of the cap if necessary AK12 36 IN. DUAL EVAPAPORATOR FRENCH DOOR
A loud snap may be heard when the tabs release. Repeat process on the opposite side
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Accessing Deli User Interface Control Board
Release the 2 tabs in top of the wire harness cover and lift off
Remove the harness from the channels and unplug
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Accessing the Deli User Interface Control Board
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Accessing the Deli User Interface Control Board
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Accessing the Deli User Interface Control Board Remove the 2 - ¼” hex head screws on the bottom of the user interface and separate the control
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Accessing the Deli Thermistor
Disconnect wire harness. Release Thermistor locking tab and remove Thermistor Deli Thermistor
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Machine Compartment & Refrigerant System
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Machine Compartment 3 Way Valve
Condenser Fan
Drain Tube
Drier Compressor
Smart Valve
Inverter Mufflers Check Valve
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Evaporation Pan
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3 Way Rotary Valve
Refrigerant to Evaporator Refrigerant to Evaporator Refrigerant from Drier
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Frenchdoor Dual Evaporator Refrigerant System Heat Loop
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XXL FDBM Dual Evaporator Operation Refrigeration system is called a sequential dual evaporator system. • Uniqueness • Two separate evaporator coils and capillary tubes – One for the refrigerator – One for the freezer
• A 3 way valve is used to direct refrigerant flow to either the refrigerator or freezer evaporator coil depending on the compartment in need of cooling. – Refrigerant flow is only directed through one evaporator at a time and therefore the use of the word sequential cooling.
XXL FDBM Dual Evaporator Operation Cooling operation – Pull down • When first plugged in and the cabinet is warm the 3 way valve moves to the closed position. At the same time the compressor, condenser fan, refrigerator evaporator fan turn on. • With the 3 way valve still in the closed position the compressor evacuates the refrigerant from the low side of the system and pumps it into the high side of the refrigerant system.
XXL FDBM Dual Evaporator Operation Cooling operation (Pull down cont.) • After a predetermined time (approximately 2 minutes) the 3 way valve changes position allowing refrigerant to flow from the high side, through a capillary tube, and into the refrigerator evaporator coil allowing cooling of the refrigerator compartment. The refrigerator evaporator fan also turns on and circulates air across the evaporator coil. Heat is removed from the air and recirculated back to the compartment. • The refrigerator compartment cooling will always be first.
XXL FDBM Dual Evaporator Operation Cooling operation (Pull down cooling cont.) • After 20 minutes the 3 way valve changes position from cooling the refrigerator to cooling the freezer. At this point refrigerant flows from the high side, through a capillary tube, and into the freezer evaporator coil allowing the cooling of the freezer compartment. The freezer evaporator fan also turns on and circulates air across the evaporator coil. Heat is removed from the air and reticulated back to the compartment. • Cooling of the freezer compartment continues for 15 minutes and then switches back to the refrigerator. • This operation continues until either compartment is satisfied at which point normal cooling mode begins.
XXL FDBM Dual Evaporator Operation Cooling operation – Normal cooling • If the refrigerator compartment is calling for cooling the control determines if the refrigerator evaporator coil temperature has been above a predetermined temperature (approximately 35°F) for 15 minutes. This is to assure the evaporator coil is defrosted. • If the evaporator coil is below the predetermined temperature the refrigerator fan turns on to circulate air over the evaporator coil to defrost it. The fan will operate until the evaporator coil is above the predetermined temperature for 15 minutes. • If the evaporator coil is above the predetermined temperature but for less than 15 minutes the refrigerator fan turns on to circulate air over the evaporator coil to defrost it. This continues until the 15 minute time is met.
XXL FDBM Dual Evaporator Operation Cooling operation (Normal cooling cont.) • When the evaporator coil is above the predetermined temperature for 15 minutes or more the 3 way valve moves to the closed position. At the same time the compressor, condenser fan, refrigerator evaporator fan turn on. • With the 3 way valve still in the closed position the compressor evacuates the refrigerant from the low side of the system and pumps it into the high side of the refrigerant system. • After a predetermined time (approximately 2 minutes) the 3 way valve changes position allowing refrigerant to flow from the high side, through a capillary tube, and into the refrigerator evaporator coil allowing cooling of the refrigerator compartment. The refrigerator evaporator fan also turns on and circulates air across the evaporator coil. Heat is removed from the air and recirculated back to the compartment.
XXL FDBM Dual Evaporator Operation Cooling operation (Normal cooling cont.) • When the refrigerator temperature cools below the control setting it will either • turn the compressor, condenser fan, and evaporator fan off and switch the 3 way valve to the open position. • or if the temperature in the freezer compartment is above the control setting or is within a predetermined amount from the cut in temperature the 3 way valve changes position allowing refrigerant to flow from the high side, through a capillary tube, and into the freezer evaporator coil allowing the cooling of the freezer compartment. The freezer evaporator fan also turns on and circulates air across the evaporator coil. Heat is removed from the air and recirculated back to the compartment.
XXL FDBM Dual Evaporator Operation Cooling operation – Normal cooling • If the freezer compartment is calling for cooling and the refrigerator is satisfied the compressor, condenser fan, evaporator fan turn on and 3 way valve changes position allowing refrigerant to flow from the high side, through a capillary tube, and into the freezer evaporator coil allowing the cooling of the freezer compartment.
XXL FDBM Dual Evaporator Operation Cooling operation (Normal cooling cont.) • When the freezer temperature cools below the control setting the control will either: • Turn the compressor and condenser fan off and switch the 3 way valve position to open. • Or if the temperature in the refrigerator compartment is above the control setting the cooling system will switch to cooling the refrigerator compartment. • In either case the freezer evaporator fan will turn off unless the ice storage temperature control is calling for cooling.
XXL FDBM Dual Evaporator Operation Cooling operation (Normal cooling cont.) • When the ice storage compartment temperature is above the control setting • Both the freezer evaporator fan and ice maker blower turn on to circulate cold air from the freezer compartment to the ice making compartment and ice storage bin
• When the ice storage compartment temperature is below the control setting either of the following will occur • Both the freezer evaporator fan and ice maker blower turn off • Or if the freezer compartment is in it cooling state only the ice maker blower will shut off.
Diagnostics and Troubleshooting
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Voltage Measurement Safety Information When performing live voltage measurements, you must do the following: Verify the controls are in the off position so that the appliance does not start when energized. Allow enough space to perform the voltage measurements without obstructions. Keep other people a safe distance away from the appliance to prevent personal injury. Always use the proper testing equipment. After voltage measurements, always disconnect power before servicing.
Check for proper voltage by completing the following steps: 1. Unplug refrigerator or disconnect power. 2. Connect voltage measurement equipment to the proper terminals. 3. Plug in refrigerator or reconnect power, and confirm voltage reading. 4. Unplug refrigerator or disconnect power.
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Power Supply Board
1
P1
POWER SUPPLY
FROM TO P1
P1-1 P1-2 P1-3 P1-4
VOLTAGE 115VAC
P2-1 P2-4 P2
P2-2 P2-5 P2-3 P2-6
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P2
1
Conditions Constant 115 VAC Constant 115 VAC Constant 14VDC
14VDC
Constant 14VDC Constant 14VDC
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Control Board P2
P1
P12
P3
1
1
1
1
1
P13 P9 1
1
P14
P6 P8 1
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P4
1
P5
P7
1 1
1
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Control Board P1
P2
P12 1
1
P3 1
1
Constant 115VAC Constant 115VAC RC or FC Door open 115V. Doors Closed = 0V Air Baffle feedback. Activate Service Test 3, Step 3 Heater, Bi-Metal bypass. Service Test 6. 115V if Bimetal closed. 115VAC Water Filter removed 115V. Filter Installed 0V Air Baffle output. Activate Service Test 3, Step 3 Fill Tube heater output. Service Test 19. 01=115v, 02=0v Heater output, w/Bi-Metal. Service Test 6. 115V
P1-1 P1-2 P2-1 P2-2 P2-3 P2-4 P2-5 P2-6 P2-7
P1-2 P1-4 P1-2 P1-2 P1-2 P1-2 P1-2 P1-2 P1-2
P12
P12-4 P12-6
P1-2 P1-2
115VAC
P3
P3-1 P3-5 P3-7
P2-1 P1-2 P3-8
RC or FC Door open 115V. Doors Closed = 0V Left RC door must be closed =115V. Open= 0V 130VDC Auger output. LH RC door Closed, Activate Ice Paddle = 130-140VDC
P1
P2
115VAC
Pantry heater output. Test 73. 01=115VAC IM heater output. Test 58. SW3 to activate 01= 115VAC
115VAC
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Control Board
1
P13-1 P13-3 P14-1 P-14 P14-3 P14-7 P13
P13 P9 1
1
3way refrigerant valve, Cannot check voltage output P13-2 3way refrigerant valve, Cannot check voltage output P13-4 FC Fan Motor Output. Activate Service Test 3, step 2 P14-2 14 RC Fan Motor Output. Activate Service Test 3, step 3 P14-4 VDC Constant 14VDC P14-6
P14 P8
P9
P9-2
P9-3
P8
P8-1 P8-3 P8-7
P8-2 P8-4 P8-8
1
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14 VDC Icebox fan output. Test 36. SW3 to activate. 01=14VDC Ice Bin Thermistor output = 1.5-5.0 VDC RC Evap. thermistor output = 1.5-5.0 VDC 3-6VDC Inverter output 3-6 VDC Constant 5VDC
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Control Board P6
P4
1
P5 1
1
J6
P4
P5 P7
P7
1
J6-1
J6-3
14VDC Dispenser light on.
P4-1
P4-4
14 VDC Constant 14VDC
P4-3
COMMUN ICATION
P5-1 P5-3 P7-1 P7-5
P5-2 P5-4 P7-2 P7-6
Cannot be checked RC thermistor output = 1.5-5.0 VDC FC thermistor output = 1.5-5.0 VDC 5VDC IM thermistor output = 1.5-5.0 VDC 14VDC IM Motor Output. Test 57, SW3 to activate. Up to 2min delay 5VDC
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LED Driver Board
120 VAC
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