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H20

H20 — Water pump abnormality

Panasonic · Air Conditioning

What does H20 mean?

This code signifies a malfunction with the water pump. The error is indicated if the abnormality persists for 10 seconds.

Common Causes

  • Indoor PCB fault
  • Water pump malfunction

Repair Steps & Checklist

Click steps to track your progress.

  1. 1

    Inspect the indoor PCB.

  2. 2

    Check the water pump for malfunction.

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