Bukh D4 Operator's Manual page 76

Steering Oil Low Temp
Possible cause: If the temperature of the steering oil is below 5°C (41°F) a message will be displayed every
thirty seconds until the oil reaches normal operating temperature.
Water in Bellows
Possible cause:
Corrective action:
Water in Fuel
Possible cause: Water has entered the fuel filter(s).
Corrective action: Empty the water trap underneath the fuel filters. Refer to Maintenance, page 95.
47708085 11-2016 © Bukh
Water in bellows.
Inspect bellows.
Fault Code Register
77