¶ 1.The USB communication of the ACE Pro is unstable
When this error occurs on the printer, first please check the ACE Pro communication, re-plug the ACE Pro signal cable, and restart the printer.
¶ 2. The USB hardware of the ACE Pro is abnormal
If the printer still reports this error after restarting, it may be that the USB hardware of the cartridge is abnormal, resulting in the serial number of the cartridge obtained by the host. Please disassemble the ACE Pro inspection signal board according to the following documentation.
Kobra S1 Combo-ACE Pro motherboard replacement guide
