Komatsu ecot3 WA430-6 Operation & Maintenance Manual page 73

OPERATION
EXPLANATION OF COMPONENTS
STEERING OIL PRESSURE CAUTION LAMP
(If equipped)
(Red)
This lamp (4) lights up to warn the operator that the steering oil
pressure has dropped.
During checks before starting (when the starting switch is turned to
the ON position but the engine is not started), this monitor does not
light up.
However, it lights up during the self-check of the emergency
steering.
During operation (engine running)
If the steering oil pressure goes down during operation, the
steering oil pressure caution lamp and central warning lamp light
up and the alarm buzzer sounds intermittently.
At the same time, the top line of the character display displays "E03" and the bottom line displays "CHECK RIGHT
NOW" and "CALL" alternately for 3 seconds each, so stop the machine immediately in a safe place, stop the engine,
and carry out inspection.
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