Komatsu GD555-5 Operation & Maintenance Manual page 63

OPERATION
EXPLANATION OF COMPONENTS
E01
If the maintenance location is displayed and the maintenance
caution lamp lights up, carry out inspection and maintenance for
the item given after completing the day's operations or when the
operators change shifts.
If "MAINTENANCE" is displayed together with E01, check the
failure code and ask for repairs to be carried out.
For details of the method of displaying the failure code, see
"FAILURE CODES (PAGE 3-192)".
REMARK
The top line of the character display displays "E01" and the bottom
line displays "MAINTENANCE" or displays the location needing
inspection, filling, or replacing.
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