Hitachi ZAXIS 120-6 class Operator's Manual page 271

6. When the manual regeneration is finished,
"Regeneration Has Completed." message will be
displayed. If "Regeneration Has Failed." message is
displayed, start the manual regeneration process again.
Regeneration process may fall in conditions other than
those mentioned above (such as sensor malfunction or
low ambient temperature).
f
NOTE:
 The engine sound may change and the engine speed may
increase when the manual regeneration starts, this is not a
malfunction.
 Regeneration time varies depending on the ambient
temperature.
 White smoke may temporarily be generated from the
tail pipe during the regeneration process, this is not a
malfunction.
 Manual regeneration time is shorter directly after machine
operation, and longer when engine temperature is low.
 Coolant temperature may increase during the manual
regeneration.
IMPORTANT:
 If regeneration must be interrupted, push the
manual regeneration switch again. The message
"Regeneration Has Failed." will be displayed on the
monitor, but the machine becomes operable. In this
case, manual regeneration should be performed
again. Restart manual regeneration as soon as
possible.
 Depending on the working and environmental
conditions, there may be occasions when
the effectiveness of the catalyst within the
aftertreatment device decreases and replacement
becomes necessary. If warm up is finished, ordinarily
a manual regeneration will take around 15 to 30
minutes to complete. If the regeneration takes over
40 minutes, contact your nearest authorized dealer
to arrange an inspection.
OPERATING THE MACHINE
5-11
MDC1-01-083EN
MDC1-01-084EN