Indicates that a Hardware related error occurred. Examples include missing or uncommunicative HW, failures in initialization of HW, and failures to configure HW. These can occur at startup or when the system is operational. Types of HW Faults include: Application File(s) Download failure; SPI Interface Initialization failure; PCI Interface Initialization failure; GigE Configuration failure; MUX Configuration failure; QAM Module Communication failure; Unsupported/Incorrect HW/FW Version (QAM, etc.); Fatal Host Firmware Exception. 'critical' indicates a fatal error occurred that prevents the APEX from performing operational requirements. 'warning' indicates an error that does not prevent the APEX from performing operational requirements.