Frigidaire FDB4315LFS1 Wiring Diagram

Standard Dry Air Flow

When the control advances to the “dry” portion of
the cycle, a vent actuation solenoid is closed.
This opens the vent valve and starts the vent fan
both located in the top right rear corner of the tub.
The fan draws in the air from outside the tub,
forcing the hot, humid air down and out the

bottom of the outer door panel. This outside,
cooler, dryer air helps to speed evaporation of
water from the hot dishes. At the same time the
heating element is continually cycled on and off.
On some models the dry portion of the cycle can
be extended to improve drying performance.

Trouble Shooting TipsExploded View of Wash System

Personal Injury Hazard

Always disconnect the dishwasher from the electrical power source before adjusting or
replacing components.

Pump Assembly

The pump assembly is driven by a synchronous
motor. Rotation is in the counterclockwise
direction at 3600 RPM. The motor drives a pump
which supplies 100 percent filtered water at a
rate of approximately 12 GPM to one spray arm
at a time. The spray arm’s operation is alternated
by small “pauses” of the motor during the wash
cycle.

Draining is accomplished by using a small
separate synchronous drain pump mounted to
the side of the sump. The drain pump is
connected to the main pump by a small rubber
hose. The drain check valve is located at the
discharge end of the drain pump. The drain hose

is attached by a worm gear clamp to the discharge
end of the drain pump.

The drain hose must have a loop at a

height of 32 inches

in order to insure proper

minimum

drainage.

The main pump can easily be removed by
disconnecting the upper spray arm supply tube
hose, the drain pump connector hose, the wiring
harness connections made at the circulation
motor, the water heat thermistor located on the
bottom of the pump and rotating the four sump
retainers toward the middle of the sump.

Detergent and Rinse Aid Dispenser

The detergent and rinse aid dispenser is a one
piece component consisting of a molded
detergent cup and a built-in rinse aid dispenser.

The detergent cup has a spring loaded cover
and the rinse aid dispenser has a removable
cover.

Liquid rinse aid is added to the dispenser up to
the fill line indicator. The amount of rinse aid
released can be adjusted by turning the arrow
indicator from one, being the least amount, to
four, being the greatest amount.

Tub and Door Seal

The door seal is pressed into the tub channel for
an interference fit. To install the seal, locate the
center mark on the seal back and press into
place. Next, install the bottom of the seal by
creating a short turn at the bottom of the tub
channel and ensuring the seal extends to the

Product Specifications

Electrical

Rating ...................................120 Volts, 60Hz

Separate Circuit..15 amp min.- 20 amp max.

Motor (Amps) ........................................... 1.8

Heater Wattage ....................................... 900

Total Amps (load rated) ......................... 10.0

TempAssure .............................. 140°F ±5°F

(60°C±3°C) [with outer door in place]

TempBoost............. 145°F ±5°F (63°C ±3°C)

Heated Wash/Heated Rinse

Sanitize .................. 150°F ±5°F (66°C ±3°C)

Hi-Limit Thermostat ................ 200°F (93°C)

To replace dispenser:

• shut off electricity to dishwasher,

• remove outer door panel assembly,

• disconnect wiring to the actuator,

• remove the six screws,

• remove the dispenser,

• replace and reinstall screws,

• rewire actuator.

locator ridge at the bottom of the tub. Then align
and gently press the seal into the channel in only
a few spots. Next, close and latch the door to
allow the gasket to seat properly into the channel.

Gasket Cross Section

Mounting
Rib

Tub
Interior

Short Turn

Water Supply

Suggested minimum incoming water

temperature ............................. 120°F (49°C)

Pressure (PSI) min./max. ................... 20/120

Connection (NPT) .....................................

3

/8"

Consumption (Normal Cycle) .......................

............. 4.9 - 9.7 U.S. gal., 18.5 - 36.7 liters

Water valve flow rate (U.S. GPM) ........... .83

Water recirculation rate (U.S. GPM) ..............

.................................................... approx. 12

Water fill time ..................................... 87 sec.

Symptom

Dishwasher will not operate when
turned on.

Motor hums but will not start or run.

Motor trips out on internal thermal
overload protector.

Dishwasher runs but will not heat.

Detergent cover will not latch or
open.

Dishwasher will not pump out.

Dishwasher will not fill with water.

Dishwasher water siphons out.

Detergent left in dispenser.

Check the Following

1. Fuse (blown or tripped).

2. 120 VAC supply wiring connection
faulty.

3. Electronic control board defective.

4. No 12 VAC power to control.

5. Motor (inoperative).

6. Door switch (open contacts).

7. Door latch not making contact with
door switch.

8. Touch pad circuit defective.

9. No indicator lamps illuminate when
START or OPTIONS are pressed.

1. Motor (bad bearings).

2. Motor stuck due to prolonged
non-use.

1. Improper voltage.

2. Motor windings shorted.

3. Glass or foreign items in pump.

1. Heater element (open).

2. Electronic control board defective.

3. Wiring or terminal defective.

4. Hi-Limit thermostat defective.

1. Latch mechanism defective.

2. Electronic control board defective.

3. Wiring or terminal defective.

4. Broken spring(s).

5. Defective actuator.

1. Drain restricted.

2. Electronic control board defective.

3. Defective drain pump.

4. Blocked impeller.

5. Open windings.

6. Wiring or terminal defective.

1. Water supply turned off.

2. Defective water inlet fill valve.

3. Check fill valve screen for
obstructions.

4. Defective float switch.

5. Electronic control board defective.

6. Wiring or terminal defective.

7. Float stuck in “UP” position.

1. Drain hose (high) loop too low.

2. Drain line connected to a floor drain
not vented.

1. Detergent allowed to stand too long in
dispenser.

2. Dispenser wet when detergent was
added.

3. Detergent cover held closed or blocked
by large dishes.

4. Improper incoming water
temperature to properly dissolve
detergent.

5. See "Detergent cover will not open."

Remedy

1. Replace fuse or reset breaker.

2. Repair or replace wire fasteners at
dishwasher junction box.

3. Replace control board.

4. Replace control board.

5. Replace motor/impeller assembly.

6. Replace latch assembly.

7. Replace latch assembly.

8. Replace console assembly.

9. Replace console assembly.

1. Replace motor assembly.

2. Rotate motor impeller.

1. Check voltage.

2. Replace motor/impeller assembly.

3. Clean and clear blockage.

1. Replace heater element.

2. Replace control board.

3. Repair or replace.

4. Replace thermostat.

1. Replace dispenser.

2. Replace control board.

3. Repair or replace.

4. Replace dispenser.

5. Replace dispenser.

1. Clear restrictions.

2. Replace control board.

3. Replace pump.

4. Check for blockage, clear.

5. Replace pump assembly.

6. Repair or replace.

1. Turn water supply on.

2. Replace water inlet fill valve.

3. Disassemble and clean screen.

4. Repair or replace.

5. Replace control board.

6. Repair or replace.

7. Clean float.

1. Repair to proper

height

.

2. Install air gap at counter top.

1. Instruct customer/user.

2. Instruct customer/user.

3. Instruct customer/user on proper
loading of dishes.

4. Incoming water temperature of
120°F is required to properly
dissolve dishwashing detergents.

32-inch minimum

020905

Hall sensor

GLASSES

CHINA/CRYSTAL

ECO WASH

CYCLES

NORMAL WASH

CLEAN

WASH 1

8 MIN.

TIME

IN

MINUTES

RINSE 1

11 MIN.

RINSE 2

11 MIN.

RINSE 3

11 M I N .

RINSE 4

11 M I N .

RINSE 5

11 MIN.

RINSE 6

15.5 MIN.

DRY *(HOT OR COOL)

22 MIN.

WASH 2

32 MIN.

DRYING

SANITIZED

WASHING

SENSING

LED

BK.......................... Black

BU............................Blue

PK............................Pink

R...............................Red

R-BK...............Red/Black

W............................White

Wiring Diagram

Display Codes (LED)

To start

To delay start

Close and latch door. Press START/CANCEL pad.

Close and latch door. Press DELAY START pad to
select desired delay time.

To select a new
cycle or option

Press desired cycle and/or option pad. The indicator
lights will change. Press START/CANCEL within 15
seconds to begin cycle.

To cancel cycle Press START/CANCEL. Dishwasher will drain for

90 seconds, then shut off.

For controls

lock . . . . . . . . . . .

Press and hold the RINSE ONLY or AIR DRY
pad for 3 seconds. To unlock, press and hold the
RINSE ONLY or AIR DRY pad for 3 seconds.

SENSING

WAS HIN G
SANITIZED
DRYING
CLEAN
OPTION LED's Flashing

STATUS LED's Flashing

---------------------- Turbidity sensor is checking the condition of the wash/rinse water.
No sensing for LIGHT WASH (UPPER RACK), LIGHT WASH (LOWER RACK) and CHINA/CRYSTAL.

---------------------- Wash portion of cycle.

-------------------- The SANITIZED criteria has been met. Indicator light will switch off when door is opened.

------------------------ Drying portion of cycle.

------------------------ Shows completion of cycle. Indicator light will switch off when door is opened.

-- HI-TEMP WASH and NO HEAT DRY/POWER DRY OFF LED's flashing indicates power failure has
occurred. Press START/CANCEL pad and reselect desired options and cycle.

-- The STATUS LED's that are lit when the door is opened will flash. Close door.

RINSE AGENT LOW ------- The liquid rinse agent is low. Light will switch off after 5 complete wash cycles or dispenser is filled.

ER/CE....Configuration Error

ER/uo.....Vent will not close

ER/uF.....Fan not running

PUMP MOTOR

DRAIN MOTOR

VIO

120VAC

60HZ

USER INTERFACE SWITCH

ELECTRONIC

CONTROL

BOARD

P3-2

P6

BU

DISPENSER

R-Y

W

P3- 3

W

W

HEATER

W

HI-LIMIT

THERMOSTAT

TURBIDITY SENSOR/

THERMISTOR

R

P1

WAT E R VA LV E

FLOAT

SWITCH

PK

P3- 1

W

Y

P3-7

P3-8

RINSE AID

LEVEL SENSE

BK

BK

P2- 8

P2- 7

P3-4

P-5

P3-6

DOOR

SWITCH

W

NEUT W

L1 BK

BK

BK

P3-5

P1

BK

P2-1

W

P2-2

R

P2-3

W

OUTPUTS

TURBIDITY SENSE

DISPENSERS

HEATER

DRAIN MOTOR

FAN/DAMPER

PUMP MOTOR

WATER VALVE

WATER HEAT DELAY

WATER HEAT DELAY

27
45

0.4
75
60
90

90

447

60 1

1
0

0
0

0
0

0

0
0
1

1
1

0
0

0

0
0
0

0
0

1
1

0

0
0
1

1
1

0
X

1

1
0
0

0
1

0
0

0

1

1

1
1
1

0
0

0
0

0

1

0

0
0
0

0
0

0
0

1

0

0

0

0

0

0

1

0

0

0

1
1
1

0
0

0
0

0

1

1
2
3
4

FILL/DISPENSER

STEP

TOTAL TIME (SEC)

WAT E R VALVE

CIRCULATION MOTOR

DRAIN MOTOR

HEATER

DISPENSER

FAN UNIT

SENSING LED

WASHING LED

SANITIZED LED

DRYING LED

CLEAN LED

FILL
WASH/HEAT
PAU SE
WASH/HEAT
WASH/HEAT/DISP.
DRAIN
DRY
TOTAL

CLEAN LED stays on until door is opened or cycle is started.

X - denotes selectable option

5
6
7
8

0
0

0
0

0
0

1

0

(Some models)

0
0
0
0
0
0

ULTIMATE/MAXX

P2- 4

P2- 5

P2- 6

BK

W

R

HALL SENSOR

DISPLAY

Y/BL

P2-13

P2-12

BK-W

P2-11

R

P32-6

BK

P32-9

FAN DRY UNIT

R-W

RINSE LED

SENSING LED

0
0
0

1
1

0
0

0

1

RINSE LED

Device being monitored

0
0
0

1
1

0
0

0

1

0
0
0

1
1

0
0

0

1

0
0
0

1
1

0
0

0

1

0
0
0

1
1

0
0

0

1

0
0
0

1
1

0
0

0

1

0
0
0

1
1

0
0

0

1

0
0
0

1
1

0
0

0

1

Fan damper

Display flashes when

Detection of failure

0
0
0

1
1

0
0

0

1

0
0
0

1
1

0
0

0

1

0
0
0

1
1

0
0

0

1

0
0
0

1
1

0
0

0

1

0
0
0

1
1

0
0

0

1

0
0
0

1
1

0
0

0

1

0
0
0

1
1

0
0

0

1

0
0
0

1
1

0
0

0

1

Turbidity

Fan speedFan speed

Rinse aid

Thermistor

Uo

Tu
HSUFHS

Th

RA

Display Codes (Readout)

Y-BK.............Yellow/Black

R-W..................Red/White

R-Y..................Red/Yellow

VIO..........................Violet

BK-W............. Black/White

SPEED WASH

RINSE ONLY

*Note: The Sahara/Maxx Dry will extend drying time by approximately 20 min.