Viking DFUD040 Manual page 28

CHECK:
• Thermister
• Control unit
L4 / F4 Water intake fault
<80 pulses within 60 seconds or correct
number of pulses is not achieved with
255 seconds. Program interrupted.
CHECK;
• Water supply
• Flow sensor
• Inlet valve
• Wiring
L5 / F5 Valve leakage
>80 pulses detected when the inlet valve
is deactivated. Certain models attempt
to remedy the leak first. Any program in
progress is interrupted (drain pump
activated).
CHECK:
• Leakage through inlet valve
• Flow sensor
L6 / F6 Pressure sensor fault
Output signal > 4.8 V. The program
continues. Indication only in the service
menu.
CHECK:
• Pressure sensor
• Control unit
• Wiring
L1 + L2 / F7 Pumping out fault
Water not evacuated after 120 seconds
pumping out. Program interrupted.
CHECK:
• Drain pump
• Hoses
• Installation of drain hose
• Control unit
• Wiring
L1 + L3 / F8 Blocked filter
The pressure sensor senses excessively
low pressure during the final rinse.
Indication after end of program.
CHECK:
• Filter
• Sump (pressure chamber)
• Pressure sensor.
L1 + L4 / F9 Circulation fault
The pressure sensor senses excessively
low pressure (e.g. no water in the
machine) or excessively high pressure
(e.g. the circulation pump is defective).
The program exits from the heating stage
and continues in the process. Indication
only in the service menu.
CHECK:
• Circulation pump
• Filter
• Water level
• Pressure chamber
• Pressure sensor
L1 + L6 / Fb Spray arm divider fault
Position contact is continuously closed
or open. The program proceeds.
Indication only in service menu.
CHECK:
• Spray arm divider
• Function of gear box
• Contacts
• wiring
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