... CISS should be placed at the same level with the printer before or after installation2,Follow the installation ... If your printer has been idlled for a long time ,please cover the air filter in case the ... the nozzle to be dry and jammed6,Do not switch off the printer frequently when it works, in case ... below the waring level ,refill the spedified ink in time, otherwise the nozzle may be jammed,very likely. ...