Seiko Group OC CS 6060 IP-6600 - Manual (Page 97)

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Section 2 Basic Operations
#SERVICE
>SERVICE CLEAN
Inspection & Maintenance
When leaving the printer for a long time (more than 2 weeks) in power
off state
Store the printer after cleaning the head and ink path with the
maintenance liquid and charging the maintenance liquid.
Six maintenance liquid cartridges and six dummy cartridges are
mandatory.
<Servce Clean>
Enter to the “SERVICE” menu and select “ SERVICE CLEAN.”
The head wash operation is mandatory when returning the printer from
the status that the service clean is performed.
Needed is Storage kit
3A