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Multiple access panels simplify service and installation. Microprocessor controls feature easy-to-understand diagnostics. Performance Sentinel system monitors the operation and signals a potential problem so maintenance can be scheduled, similar to a car’s check engine light. Removable blower inlet rings allow easy access to the fan and motor. Dual spring and grommet isolation-mounting system for the compressor reduces vibration, and discharge muffler mitigates inherent compressor pulse sound. Flexible torsion motor mounting further reduces vibration and related sound. Compressor and air-handler compartments are separated by insulated divider and blower housing is covered in noise suppression material.