Toshiba P20-01

Critical

SMMS / SMMS-e — High pressure protection — compressor 1.

Toshiba P20-01: High pressure protection — compressor 1. This fault typically halts operation and needs immediate attention.

Possible causes

Condenser/airflow blocked / overcharge (circuit 1).

Check steps

Measure high pressure (Pd) circuit 1, check condenser/fan.

Affected parts

Hochdrucksensor (Pd)
Verflüssiger

Safety note

High-pressure side — hot & pressurized. Follow F-Gas.

Source: Toshiba resmi servis kılavuzu — Confirmed verbatim on PDF page 8: 'P20 Activation of high-pressure protection'. No -01 suffix documented (base code only).

Reviewed by Anıl Güzeldemir — in the refrigeration machine room since 2006, developer of Enthalio.

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Related fault codes

Outdoor unit high pressure fault.P04 Discharge temperature high (TD1 > 115°C)P03 Outdoor fan IPDU (driver) errorP22 4-way valve errorP19 Compressor error (position detection)P29 No communication to indoor unitE06