FieldBench
Mitsubishi codes

Mitsubishi

P6

Protect

Freeze / overheat

Coil out of band.

Walk P6 in Diagnose

2 plates — walk the one on the cabinet

First check

1 Airflow and freeze before you add gas

On Mitsubishi MSZ-FS low pressure / freeze is indoor airflow or a starved coil until proven otherwise. Filter, blower, dirty A-coil, closed supplies. In heat mode, a iced outdoor coil is the same family. Filter, fan, charge, sensor.

Expect: Indoor air moving. Coil not iced. OD coil clear in heat.

The rest of the walkthrough is Diagnose.

On the plates

  • Filter, fan, charge, sensor.
  • Weigh-in — no piston SH chart.
  • Filter, indoor fan, charge, pipe sensor.
  • Not an FS i-see airflow ‘smart’ mode.

Plates that use P6