The Pressure pump performed its movement cycle a predetermined number of times (60 cycles), but the pressure does not reach the specified level due to a malfunction of the pump, sensor or motor. Because of air leaks, the specified pressure cannot be obtained. Air is leaking through a gap between the ink cartridge and the ink cartridge holder due to an obstruction between them.
Check junction of the ink cartridge and the ink cartridge holder, and remove any obstruction between them if any. Replace the ink cartridge. Replace the pressure pump (PURESSURE, PUMP, ASSY).