Toshiba Mmy-map1004ft8-e Service Manual Jun 2026

R410A (Pre-charged factory volume varies; check unit nameplate)

: Super Heat Recovery Multi (SHRM-i) / VRF Outdoor Unit.

Replacing the inverter-driven DC twin-rotary compressor. toshiba mmy-map1004ft8-e service manual

Wash aluminum fins with low-pressure water to remove debris. Avoid bent fins to prevent high-head pressure faults ( P20 ).

The service manual outlines strict limitations for refrigerant piping. Deviating from these metrics will trigger system faults, oil return failures, or compressor damage. Piping Length Restrictions : Up to between the outdoor unit and the farthest indoor unit. Total Piping Length : Up to for the entire distribution network. Maximum Height Difference : if the outdoor unit is above the indoor units ( if below). Refrigerant Charging Formula The unit comes pre-charged from the factory, but additional Avoid bent fins to prevent high-head pressure faults ( P20 )

Maximum 40 meters if the outdoor unit sits below the indoor units. Height Difference Between Indoor Units: Maximum 15 meters. Refrigerant Charge Calculation

Regular maintenance and proper diagnostic procedures are vital for this commercial system. The Toshiba service literature for this series provides clear steps for advanced servicing. Piping Length Restrictions : Up to between the

By manipulating the SW01/SW02/SW03 rotary switches, you can display real-time sensor measurements directly on the board:

Discharge thermistor senses temperatures exceeding safe limits (typically >115°C).

Turn on the main crankcase heater breaker at least starting the compressor to boil off liquid refrigerant trapped in the compressor oil. Step 2: Auto-Addressing Setup

A common field error: Forgetting to set the termination resistor (DIP SW 30-2) on the last outdoor unit. The manual shows exactly which pins to toggle.