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Mitsubishi Electric · Mitsubishi PUZ-HA30-36NHA4 Outdoor Unit
What does A8 (6608) mean?
This abnormality is detected if a message was transmitted, an acknowledgment (ACK) of receipt was received, but no response command returns. The transmitting side detects this abnormality every 10 seconds, 6 times continuously. The remote controller displays the address and attribute of the controller that did not reply (ACK).
Additional Steps
Steps 1–2 are listed in Priority Fix.
- 3
If the abnormality (A8) regenerates after a power cycle, the controller at the displayed address and attribute may be defective and require replacement.
- 4
Verify that the total transmission wire length does not exceed 1000m (656ft) and the remote controller line does not exceed 15m (49ft), as over-range extension can affect voltage and signal.
- 5
Confirm that the transmission wire type matches the specifications: With shield wire (CVVS, CPEVS) or With normal wire (no shield - VCTF, VCTFK, CVV, CVS, VVR, VVF, VCT) with a diameter of 1.25mm² [AWG16] or more.