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H27

H27 — Service valve error

Panasonic · Air Conditioning

What does H27 mean?

This error indicates a problem with the service valve. It is logged if the issue persists for 5 minutes.

Common Causes

  • High pressure sensor is defective or disconnected

Repair Steps & Checklist

Click steps to track your progress.

  1. 1

    Check if the high pressure sensor is defective.

  2. 2

    Ensure the high pressure sensor is properly connected.

Browse all codes in this manual (53)
Verified technical data. Last updated: April 2026

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Source: Panasonic Air Conditioning
Open Manual (Page 162)Search more codes in this manual