Rheem

PF

Lockout

PF — input phase loss

Keypad example: PF. Missing or imbalanced incoming phase.

First check

1 Three legs at the disconnect and the contactor

On Rheem RKNL measure L1 L2 L3 at the disconnect and at the compressor contactor. A phase monitor trips on loss, imbalance, or reverse rotation. L1 L2 L3 at the drive and at the disconnect. Tight lugs.

Expect: All three legs, nameplate voltage ±10%, phase monitor closed.

The rest of the walkthrough is Diagnose.

On the plates

L1 L2 L3 at the drive and at the disconnect. Tight lugs.
A rooftop fuse that opened one leg looks like a dead motor until you read PF.

Plates that use PF

RKNL
Rheem/Ruud packaged G/E · Classic / Resolute · under 15 t
Diagnose RKNL — Sign in

Same number, other makers

PF on Rheem is not the same code on these plates.

Bryant PFPF — input phase loss
Carrier PFPF — input phase loss
Goodman PFPF — input phase loss
ICP PFPF — input phase loss
Lennox PFPF — input phase loss
Trane PFPF — input phase loss
York PFPF — input phase loss