"Ink Tank Error" or "Unknown ink cartridge" message on the SendPro C Auto
Ensure you install the correct ink cartridge if the Ink Tank Error or Unknown ink cartridge messages appear.
Products affected: SendPro® C Auto (9H00)
Issue
An Ink Tank Error or Unknown ink cartridge message appears when you install an ink cartridge.
Cause
You have installed the ink cartridge for a smaller postage meter.
Resolution
Ensure you install the correct ink cartridge. The correct ink cartridge for the SendPro Auto is: 765-9. The smaller ink cartridges 795-5 or SSl-798-0 will fit into the carriage but will not work.
Visit our supplies site to order the correct cartridge.
UPDATED: April 07, 2025