Fail Codes - Viking FDB451 Service Manual

System Diagnosis

Fail Codes

LED 1 LED 2 Service
Pots Pans Normal Cycle Only
Wash
1 1
1 2
1 3
1 4
1 5
2 1
2 2
2 3
2 4
2 5 X
3 1
3 2 X
3 3
3 4
3 5
12
Error Code
Moisture sensor reads out of normal range
Moisture sensor
disconnect
Motor control communicates a
Motor Control Status
motor operation failure mode that is most likely
Error
caused by the motor control
(Variable Speed Motor)
Main control cannot succesfully communicate
Motor Control Comms
with the motor control
Error
Main control activates the diverter,
but never sees feedback from the diverter that
the correct position is reached
Diverter Timeout
During a drain, the pressure sensor output
never drops to the "empty" level
Drain Error (pressure
sensor models)
Pressure Sensor Pressure sensor reads out of normal range low
Disconnect Error
During a fill, the pressure sensor output does
not reach target fill pressure
Fill Error (pressure
sensor models
Pressure sensor indicates a water level lower
than the low level threshold
Low Level Error
Pressure sensor indicates a water
level higher than the high level threshold
High Level Error
Drains to fast (abnormal pressure sensor
change)
Siphon Error
User interface is unable to successfully
User Interface - Main
communicate with the main control
Control
Communication Error
Control detects insufficient/inconsistent water
flow through the wash system and will not allow
the flow through heater to activate
Pump Flow Error
Drain pump current sense is out of range
Drain Pump Error
Motor control communicates a motor operation
failure mode that is most likely caused by the
Motor Status Error motor
Motor Under Voltage Motor control communicates a low motor
Error control voltage condition
Cause Action / Possible Root Cause(s)
1. Wires disconnected to moisture sensor in base pan
2. Defective moisture sensor
3. Defective control board
1. Wires disconnected between motor control and motor
2. Defective motor control
3. Defective motor
1. Wires disconnected between motor controller and control board
2. Defective Motor control
3. Defective control board
1. Wires disconnected between control board and diverter
2. Defective diverter
3. Defective control board
1. Verify that dishwasher drain hose is not clogged or kinked
2. Verify that plug has been removed from disposal (if so connected)
3. Verify that hose has a high loop per installation guide
4. Verify that dishwasher is level front to back and side to side
5. Verify that filters are not clogged
6. Defective drain pump
7. Defective pressure sensor
8. Defective control board
1. Verify the pressure sensor is properly connected
2. Defective pressure sensor
3. Defective sensor harness
1. Verify water is turned on to dishwasher
2. Verify that fill line is not kinked
3. Verify that dishwasher is level front to back and side to side
4. Verfiy there has not been a decrease in water pressure
5. Defective pressure sensor
6. Defective control
1. Low water level in sump (check that items are secured in rack)
2. Verify that the drain has the proper high loop
3. Defective pressure sensor
4. Defective main control
1. Excess water in sump (check that items are secured in rack)
2. Defective pressure sensor
3. Defective main control
1. Make sure that unit is level front to back and side to side
2. Verify that the drain line has the proper high loop
3. Defective pressure sensor
4. Defective main control
1. Wires disconnected between main control and user interface
2. Defective cable between main control and user interface
3. Defective main control
4. Defective user interface
1. Verify water is fully turned on to dishwasher
2. Verify that fill line is not kinked
3. Verify that dishwasher is level front to back and side to side
4. Verify that filters are not clogged
5. Verify that there has not been a decrease in water pressure
6. Verify that the drain has the proper high loop
7. Verify proper fill level
8. Enable extended fill service mode (press and hold Normal Wash for
10 seconds)
9. Defective wash motor
10. Defective water inlet valve
11. Defective main control
1. Wires disconnected between main control and drain pump
2. Defective drain pump
3. Defective main control
1.Verify connection between motor control and motor
2. Defective motor control
3. Defective machine control
1. Verify house voltage is in specification.
2. Verify connection at terminal block
3. Verify AC connection to the machine control
4. Verfiy connection between machine control and motor control
5. Defective machine control
6. Defective motor control
©2012 Viking Preferred Service