System Diagnosis
12 ©2012 Viking Preferred Service
Fail Codes
Pots Pans
Normal
Cycle Only
Error Code Cause Action / Possible Root Cause(s)
1 1
Moisture sensor
disconnect
Moisture sensor reads out of normal range
1. Wires disconnected to moisture sensor in base pan
2. Defective moisture sensor
3. Defective control board
1 2
Motor Control Status
Error
(Variable Speed Motor)
Motor control communicates a
motor operation failure mode that is most likely
caused by the motor control
1. Wires disconnected between motor control and motor
2. Defective motor control
3. Defective motor
1 3
Motor Control Comms
Error
Main control cannot succesfully communicate
with the motor control
1. Wires disconnected between motor controller and control board
2. Defective Motor control
3. Defective control board
1 4 Diverter Timeout
Main control activates the diverter,
but never sees feedback from the diverter that
the correct position is reached
1. Wires disconnected between control board and diverter
2. Defective diverter
3. Defective control board
1 5
Drain Error (pressure
sensor models)
During a drain, the pressure sensor output
never drops to the "empty" level
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
2 1
Pressure Sensor
Disconnect Error
Pressure sensor reads out of normal range low
1. Verify the pressure sensor is properly connected
2. Defective pressure sensor
3. Defective sensor harness
2 2
Fill Error (pressure
sensor models
During a fill, the pressure sensor output does
not reach target fill pressure
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
2 3 Low Level Error
Pressure sensor indicates a water level lower
than the low level threshold
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
2 4 High Level Error
Pressure sensor indicates a water
level higher than the high level threshold
1. Excess water in sump (check that items are secured in rack)
2. Defective pressure sensor
3. Defective main control
2 5 X Siphon Error
Drains to fast (abnormal pressure sensor
change)
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
3 1
User Interface - Main
Control
Communication Error
User interface is unable to successfully
communicate with the 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
3 2 X Pump Flow Error
Control detects insufficient/inconsistent water
flow through the wash system and will not allow
the flow through heater to activate
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
3 3 Drain Pump Error
Drain pump current sense is out of range
1. Wires disconnected between main control and drain pump
2. Defective drain pump
3. Defective main control
3 4 Motor Status Error
Motor control communicates a motor operation
failure mode that is most likely caused by the
motor
1.Verify connection between motor control and motor
2. Defective motor control
3. Defective machine control
3 5
Motor Under Voltage
Error
Motor control communicates a low motor
control voltage condition
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
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