Measure insulation resistance between power terminals and ground (Must be > 1 Ωcap omega using a 500V Megger).
Outdoor unit function code settings (O.DN codes) for high static pressure or priority modes. Refrigerant Cycle Diagrams toshiba mmy-map1004ft8-e service manual
Pipe lengths, height differences, and wiring requirements. toshiba mmy-map1004ft8-e service manual
You might be tempted to rely on general HVAC knowledge or generic troubleshooting guides. That is a dangerous gamble. Here is why the official Toshiba service manual is non-negotiable: toshiba mmy-map1004ft8-e service manual
Nominal 28.0 kW for both cooling and heating. Refrigerant: Uses R410A . Power Supply: 3-phase, 380–415V, 50Hz.