Rheem
HPS
LockoutHigh pressure switch open
Outdoor HPS opened — coil circuit is dead. Not an inverter pressure fault and not an L-code.
Walk HPS in Diagnose
5 plates — walk the one on the cabinet
First check
1 Let it cool, then read the drive LED
On Rheem RA14AZ overcurrent / overheat is often a dirty coil, a failed OD fan, or a locked compressor — not a dead inverter. Clear airflow, confirm the OD fan, and read the drive LED before you order a control. HPS continuity, reset if manual, wiring in series with the coil.
Expect: OD fan running. Coil clean. Drive LED decoded from THIS outdoor’s card.
The rest of the walkthrough is Diagnose.
On the plates
- HPS continuity, reset if manual, wiring in series with the coil.
- Outdoor airflow: dirty coil, bent fins, fan not running (see ODF / cap).
- Overcharge or non-condensables — confirm indoor metering before you recover (SH vs SC).
- Do not treat this as a 25VNA drive trip.
- OD coil packed. Fan running and correct rotation on 3-phase.
- Overcharge or non-condensables. Recirc over a low roof screen.
- Indoor airflow so bad the refrigerant has nowhere to go — still an HPS trip.
Plates that use HPS
Same number, other makers
HPS on Rheem is not the same code on these plates.