Section 4 - Operations
58 SCHWARZE HYPERVAC HV-18 revised 11/18
Emission Control Catalyst Cleaning (Regen) , Engine Fault Codes and Other Engine Data
The Schwarze Hypervac utilizes very low emission Tier 4 off-highway engines featuring state of the art emission controls.
These emission controls are controlled by the engine computer and need very little maintenance. If something does need
attention, a series of notications and warnings will appear on the main sweeper display screen. If actions are required,
instructions are found on the “Engine Trouble Codes” screen as described in this section.
One action that is likely is the need to clean the catalyst. The Engine is equipped with a catalyst that may need to have
some combustion by-products burned off. Normally the catalyst cleans itself. During the cleaning process the exhaust
temperature lamp will appear and rpm will not drop below 1250 rpm. This cleaning process takes about 30 minutes.
Always attempt to let this process complete itself by allowing the engine to continue running. Shutting off the engine
will stop the process and it will need to start over when the engine is restarted. This condition is completely normal and
sweeping may continue as normal.
Note: Unless in a emergency, the cycle should be inhibited, engine idled, high temp icon extenquished before shutting
down the engine.
In some cases a more thorough cleaning may be needed. The instructions for a manually initiated thorough catalyst
cleaning, also called “regen”, can also be found in this section.
The following engine codes can be visible on the operator’s screen:
CRITICAL FAULT - Engine has a critical fault. It needs the attention of a qualied engine service dealer.
This could be a catalyst that was not cleaned and has exceeded the maximum cat soot level. The engine
will be de-rated.
WARNING SYMBOL - Engine has sent a warning that a code has been sent. If this concerns emission
controls, the catalyst may have reached its maximum cat soot level. A forced regen must be performed
immediately.
EMISSION FAULT - The engine controller has sent a code that indicates an emmision system fault.
Contact a service dealer immediately.
The following catalyst cleaning (regen) codes can be visible on the operator’s screen:
Catalyst has reached maximum temperature, and cleaning is in process. Be sure no ammable materials
are near the exhaust.
A forced cleaning is needed soon. Normal work can continue unless the warning symbol also appears. A
forced clean must then be performed immediately.
Catalyst cleaning (regen) cycle has been inhibited by the operator from the “Engine Trouble Codes”
screen. This prevents the catalyst cleaning cycle. This is only for temporarily delaying the cycle. Leaving
this inhibited for long periods will damage the catalyst.
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