Hitachi ZW 550-6 Operator's Manual page 147

5. Press selector knob (2) to display Monitoring screen (7).
f
NOTE:
 When the "PM Accumulation" bar reaches the right
end, auto-regeneration takes place. However, auto-
regeneration may not be performed depending on the
machine condition.
 The PM Accumulation is not displayed during regeneration.
OPERATOR'S STATION
1-83
7
MNHG-01-271EN