Emission compliance
The aftertreatment system is monitored by
diagnostic systems in the control units to ensure
reduced emissions. If the system does not meet the
emission requirements, it should not be possible to
use the machine for work as usual. This takes place
by a reduction of engine power (derate).
Engine power is reduced if:
- The level in the AdBlue®/DEF tank is too low
- AdBlue®/DEF is of low quality
- There is a problem/malfunction with the
aftertreatment system
There are two levels of engine power reduction
(derate) that are activated after a certain time
depending on the type of problem, as well as if the
malfunction reoccurs or not.
Restoring engine function
If the engine is restarted (by turning the ignition off
and on) when engine power has been reduced,
then full engine power (called restored engine
function) can be obtained twice during derate level
1. This can be done in case of a danger or hazard
and, e.g., if the machine has to be moved. This will
not extend the time for activation of derate level 2.
Operating instructions
Exhaust aftertreatment system
191
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