Daikin VRV

Daikin VRV Error Code C1

Troubleshooting guide for the Daikin VRV system fault C1.

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What It Means

Failure of transmission (between indoor unit PCB and sub PCB).

Possible Causes

  • Defective connection of the connector between indoor unit PCB.

Not sure which one it is — or if it's none of these? Try ACLogics today.

Disclaimer: This information is for general reference. Error codes can vary by model and production year. Always refer to your machine's specific manual and the information printed on the unit itself.
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Full Diagnosis

Failure of transmission (between indoor unit PCB and sub PCB)

All Recorded Causes

Defective connection of the connector between indoor unit PCB

Verify Before Replacing Parts

  1. Confirm the exact Daikin model family and vrv context before acting on a generic code description.
  2. Start with the exact model documentation and verify the full operating sequence before replacing parts, particularly around defective connection of the connector between indoor unit PCB.
  3. Use the listed causes as branches to confirm or eliminate with measurements, not assumptions — the next candidate on the list is a reasonable second branch.
  4. After the correction, run the system long enough to confirm the vrv fault does not return under normal load.

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