Volvo VNL 780 Operator's Manual page 403

If a request for manual regeneration fails, "REGEN Failed Check Menu Status" is displayed.
Scroll to the Aftertreatment menu in the Drive Information Display (DID) and select "ATS
Status" to determine why the regeneration failed.
WARNING
For chassis equipped with a heated-dump
body, be aware the temperature around
the area where the exhaust enters the body
as well as the product contained in the
body, may be elevated, particularly during
DPF regeneration.
OPERATION
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