Exhaust Filter Cleaning Operations; Disabling Automatic (Auto) Exhaust Filter Cleaning; Force A Manual Exhaust Filter Cleaning - Generac Power Systems MAGNUM MMG75D Operating Manual

Make sure any problems that cause the main circuit breaker to trip are corrected before returning the switch to ON (I).
The main circuit breaker interrupts power to the connection lugs and the optional cam lock
receptacles only. The customer convenience receptacles have power even if the main circuit
breaker is OFF (O). To disconnect power to these receptacles, use the individual circuit

EXHAUST FILTER CLEANING OPERATIONS

When enabled, the exhaust filter system goes through an automatic cleaning process known as regeneration. Under
normal circumstances, regeneration occurs without interruption of unit operation and with minimal operator involve-
ment. In the event there are conditions requiring the operation of the unit with the auto exhaust filter cleaning disabled,
the operator may be required to perform procedures to enable or disable the auto exhaust filter cleaning. The operator
may also be required to perform a manual regeneration.
The area above and surrounding the exhaust system during an auto or manual exhaust
filter cleaning should be clear of people and objects. Exhaust gases and components
can reach temperatures hot enough to ignite and melt common materials.
Note: Always park the unit in a safe location for elevated exhaust temperatures and check for adequate fuel level
before beginning the exhaust filter cleaning process. The cleaning cycle can take an extended period of time
(approximately 45 minutes). Cleaning is complete when the Regeneration indicator remains off.

Disabling Automatic (Auto) Exhaust Filter Cleaning

The auto exhaust filter cleaning feature should always be enabled unless doing so would cause an unsafe working
environment. In the event that an unsafe working environment would occur, use the following procedure to disable
the auto exhaust filter cleaning feature:
1. Open the control door and locate the switch labeled "EXHAUST FILTER CLEANING."
Move the switch to DISABLED (O).
2.
Enter the DPF Status screen and verify the Disabled Regeneration indicator appears above the words "DPF
3.
Inhib - Solid." For information regarding the DPF Status screen and indicators, see
Monitoring.
Disabling Auto Exhaust Filter Cleaning is not recommended for any situation unless it is
safety related or if the fuel tank lacks the required fuel to complete the cleaning process.

Force a Manual Exhaust Filter Cleaning

If running the unit with the exhaust filter cleaning function disabled, the DPF Status screen may display a red alarm,
prompting the operator to force a manual exhaust filter cleaning. Use the following procedure to force a manual
exhaust filter cleaning feature:
1. Open the control door and locate the switch labeled "EXHAUST FILTER CLEANING."
Move and hold the switch in ON/FORCED (I) for five seconds.
2.
33701 C
breakers located near each receptacle.
WARNING
MMG75D-100D Operating Manual
Operation
Diesel Exhaust Filter
31