Yes, the unit needs to be turned off. If it's not, the inkjet is still running. The make-up material you clean the printer will can enter the ink stream, causing the ink mixture in the reservoir to become out of balance. This can lead to bad printing and unplanned downtime as you may need to flush the reservoir and allow the machine to re-calibrate which can take an hour.
Does the unit need to be turned off ?
Yes, the unit needs to be turned off.
If it's not, the inkjet is still running. The make-up material you clean the printer will can enter the ink stream, causing the ink mixture in the reservoir to become out of balance. This can lead to bad printing and unplanned downtime as you may need to flush the reservoir and allow the machine to re-calibrate which can take an hour.