FieldBench
Mitsubishi codes

Mitsubishi

P4 / P9

Lockout

Drain / float

Cassette/ducted more than wall, but FS can still show a drain accessory fault.

Walk P4 / P9 in Diagnose

Sign in for the next measurement

First check

1 Float and the pan

On Mitsubishi MSZ-FS a drain / float code is water until proven otherwise. Pan full? Float stuck? Secondary drain piped? Pump, float, pitch. Not an i-see code.

Expect: Pan dry after you clear it. Float moves freely.

The rest of the walkthrough is Diagnose.

On the plates

  • Pump, float, pitch. Not an i-see code.

Plates that use P4 / P9