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P8

LCD shows P8 - Abnormality of pipe temperature

MHI · Air Conditioning

What does P8 mean?

The remote controller LCD displays 'P8', indicating a general abnormality of the pipe temperature.

Common Causes

  • Pipe temperature thermistor malfunction.
  • Improper refrigerant flow.
  • Incorrect pipe temperature reading.

Repair Steps & Checklist

Click steps to track your progress.

  1. 1

    Check the pipe thermistors for secure connections and proper placement on the pipes.

  2. 2

    Verify that all stop valves in the refrigerant line are fully open.

  3. 3

    If multiple units are connected, check for correct connection of extension pipes.

Browse all codes in this manual (124)
Verified technical data. Last updated: April 2026

Related Faults

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Source: MHI Air Conditioning
Open Manual (Page 18)Search more codes in this manual