CodeRegistry
Brands
  1. Home
  2. Mitsubishi Electric
  3. PUMY Air Conditioners
  4. 6608
About·Privacy·Terms

CodeRegistry — Your global library for technical solutions.

For your safety: always follow the equipment manufacturer’s official manuals. CodeRegistry is an independent help site and is not affiliated with the brands listed here.

6608

6608 - No response frame error (M-NET Remote controller only)

Mitsubishi Electric · PUMY Air Conditioners

What does 6608 mean?

The system did not receive a response frame from an M-NET device, specifically when only an M-NET Remote controller is detected. This causes the air conditioning system to automatically stop operating.

Common Causes

  • Communication timeout or data loss.
  • Faulty M-NET device or remote controller.
  • Wiring issues on the M-NET communication bus.

Repair Steps & Checklist

Click steps to track your progress.

  1. 1

    Note the 6608 code displayed on your remote controller.

  2. 2

    Turn off the main power supply to the system at the circuit breaker.

  3. 3

    Wait for 1 minute, then turn the main power supply back on.

  4. 4

    If the error persists, contact a qualified service technician to check the M-NET communication and connected devices.

Browse all codes in this manual (93)
Verified technical data. Last updated: April 2026

Related Faults

04030403 - Serial communication error11021102 — Compressor temperature trouble13001300 - Low pressure error
Source: Mitsubishi Electric PUMY Air Conditioners
Open Manual (Page 38)Search more codes in this manual