This read-only 16-character DisplayString reports secondary service-state codes for the Common Controller, using substrings such as FAN for a fan failure, HIGH for an over-temperature condition, and PWR for a power problem. It gives an administrator a more specific diagnosis than the primary service state alone, pinpointing which subsystem is degraded. For example, seeing HIGH in this field would direct a technician to check the shelf's cooling system rather than assume a power supply fault.