The manual details "Emergency Operation" or backup procedures that allow the system to continue running (often at reduced capacity) if certain components fail. Installation & Maintenance Essentials
Explanations of inverter P.C. board (e.g., MCC-1729) operations and noise filter boards (MCC-1749). toshiba mmymap1404ft8e service manual
Instructions for power supply design and control wiring, including how to set unique addresses for indoor units so the outdoor unit can communicate with them individually. toshiba mmymap1404ft8e service manual