The coolant is a thermal fluid used to maintain the temperature of the ink in the printheads and ink reservoirs on the carriage. Temperature control of the ink is required in order to achieve the correct ink viscosity, which affects the jetting velocity of the ink and thus the quality of printed images. The coolant is pumped past a heater that has a thermostat to maintain the coolant temperature. The coolant flows in series through each of the printheads and then returns to the coolant reservoir. Each printhead has an internal sensor that provide temperature feedback. The reservoir block also has a sensor to provide feedback. The coolant reservoir contains an optical level sensor. A sight tube on the side of the gantry, at the opposite end from the carriage, displays the level of coolant in the reservoir. The operator must maintain this level.
If the coolant level is low, the ink and printheads cannot be maintained at the proper temperature. Periodically check the level of coolant and add more coolant if it is below the center of the sight tube.
Check the coolant level sight-tube, located at the side of the gantry, to verify that the level is low. When filled to the proper level, the fluid will be at the center of the sight-tube. If the level of coolant is lower than the center, it is time to fill it. Keep the coolant at the correct level to maintain the proper ink temperature as the coolant is important to that process.
NOTE
Change the coolant fluid at least one time every 12 months with new coolant. Over time and with use, crystal deposits build up in the coolant and can impede the flow and result in pump damage. Consult your service representative for details.
Verify that the coolant level is below the center of the sight-tube. If it is at the center or higher, it is not necessary to add coolant. The sight-tube is located on the side at the right end of the gantry.
Syringe (supplied with Starter kit)
Wear gloves (coolant will not harm the skin, but gloves are recommended).
Coolant
Fill Coolant Reservoir NOTE
Do not overfill the coolant as this can cause temperature variations. If the coolant does not flow into the fill nozzle the printer may have a defective nozzle and this will require a service call.