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H64

H64 — Outdoor high pressure sensor abnormality

Panasonic · Air Conditioner Panasonic PRO Club

What does H64 mean?

The outdoor high pressure sensor has shown an abnormality, specifically an open circuit, for one minute while the compressor is stopped. This indicates a problem with the sensor or its connections.

Common Causes

  • High pressure sensor open circuit during compressor stop

Repair Steps & Checklist

Click steps to track your progress.

  1. 1

    Check the high pressure sensor.

  2. 2

    Inspect the sensor's lead wire and connector.

Browse all codes in this manual (31)
Verified technical data. Last updated: April 2026

Related Faults

2 beeps2 beeps - Confirmation of Forced heating operation start3 beeps3 beeps - Remote Control Number Switch Mode standby4 beeps4 beeps - Remote Control Receiving Sound Off/On Mode standby
Source: Air Conditioner Panasonic PRO Club
Open Manual (Page 81)Search more codes in this manual