Hitachi ZAXIS 30U-5N Operator's Manual page 93

OPERATOR'S STATION
IMPORTANT: When the machine is operated with the
muffler filter regeneration inhibited, the muffler filter
becomes clogged. When muffler filter regeneration
11
request is detected at the regeneration inhibited
state, regeneration inhibited alarm screen (11) will be
displayed. Move the machine to a safe place. Perform
manual regeneration following the below procedure.
Failure to do so may damage the muffler filter. Refer to
"Muffler Filter" section for the manual regeneration.
MADH-01-063
1-33