Daikin Aircon C6 Error Code: What It Means for Your Model

What does Daikin C6 mean?

Daikin C6 is listed as malfunction of fan motor sensor or fan control driver, indoor PCB and fan PCB combination, capacity-setting, or indoor PCB abnormality, and indoor fan-motor sensor or driver malfunction in mixed model-family source rows, including VRV X RXQ-A(N)R cooling only and Sky Air FNA R32 - indoor error overview. The loaded row is source-backed by official diagnostic material. Do not collapse this code across model families; use the model, series, or system type to choose the right row. Confirm the exact model, series, or signal row before accepting a parts quote.

Choose the matching source row

The same visible code has more than one source-backed meaning. Match the model family, system type, or reporting unit before approving parts.

Code, what it means, and what to check first
Code	What it means	What to check first
SkyAir	Malfunction of fan motor sensor or fan control driver	Match this row to the installed model or reporting unit, then use the source-specific checks below.
VRV X RXQ-A(N)R cooling only	Indoor PCB and fan PCB combination, capacity-setting, or indoor PCB abnormality	Match this row to the installed model or reporting unit, then use the source-specific checks below.
Sky Air FNA R32 - C6 (indoor error overview)	Indoor fan-motor sensor or driver malfunction	Confirm the indoor model is FNA25~60A2VEB(9), record the reporting controller, and follow the matching Daikin service procedure.

Code
SkyAir
What it means
Malfunction of fan motor sensor or fan control driver
What to check first
Match this row to the installed model or reporting unit, then use the source-specific checks below.
Code
VRV X RXQ-A(N)R cooling only
What it means
Indoor PCB and fan PCB combination, capacity-setting, or indoor PCB abnormality
What to check first
Match this row to the installed model or reporting unit, then use the source-specific checks below.
Code
Sky Air FNA R32 - C6 (indoor error overview)
What it means
Indoor fan-motor sensor or driver malfunction
What to check first
Confirm the indoor model is FNA25~60A2VEB(9), record the reporting controller, and follow the matching Daikin service procedure.

What to do now

Use these steps to record evidence and match the installed model to its service manual before diagnosis or a repair quote.

Record C6 and match the service manual
Record C6 and stop there; the source table gives no customer reset procedure. Arrange diagnosis with the matching service manual.
No manufacturer reset steps listed for C6
Capture the complete C6 error code and model stickers first. The source table lists the meaning but no customer reset procedure; do not treat a generic power-cycle as manufacturer guidance.
Send these to us
C6 error code, a clear display photo, Daikin indoor and outdoor model stickers, the controller, gateway, or unit that reported the code, operating mode and affected area, and any power or setting changes made after the code appeared

Source-specific guidance

These diagnostic-reference notes help match the code to the exact model. Electrical, refrigerant, wiring, resistance, and component checks are technician work, not DIY steps.

Source-specific guidance
Source detail	What it says
Singapore / model note	Official Daikin SM-TS3 self-diagnosis row. Manual causes: Defective fan PCB; Defective capacity setting adaptor connection; Field setting error.
Singapore / model note	Official Daikin RXQ6-48A(N)R cooling-only service-manual row. Confirm the installed model and matching regional manual before diagnosis; this source is not claimed as universal across every Daikin VRV generation.
Singapore / model note	Official Daikin Europe 4PEN550955-3D row for FNA25~60A2VEB(9) R32 indoor units. This is an exact FNA model-family interpretation, not a claim that every Singapore SkyAir model uses the same row.

Source detail
Singapore / model note
What it says
Official Daikin SM-TS3 self-diagnosis row. Manual causes: Defective fan PCB; Defective capacity setting adaptor connection; Field setting error.
Source detail
Singapore / model note
What it says
Official Daikin RXQ6-48A(N)R cooling-only service-manual row. Confirm the installed model and matching regional manual before diagnosis; this source is not claimed as universal across every Daikin VRV generation.
Source detail
Singapore / model note
What it says
Official Daikin Europe 4PEN550955-3D row for FNA25~60A2VEB(9) R32 indoor units. This is an exact FNA model-family interpretation, not a claim that every Singapore SkyAir model uses the same row.

What to check before repair

The source table establishes the code meaning, not a repair procedure. Capture evidence first; model-specific tests belong to the matching service manual.

Homeowner checks and technician confirmations
You can check	Technician should confirm
Photograph the complete C6 error code before taking any action.	Confirm C6 exactly and record which controller, gateway, or unit reported it.
Capture the Daikin indoor and outdoor model stickers and identify which controller or unit reported it.	Match the indoor and outdoor model stickers, installed family, and reporting equipment to the source scope.
The source table provides no customer reset procedure. Preserve the evidence and use the matching service manual for any system action.	Follow the matching service-manual procedure and keep measured test evidence before naming a failed part.

You can check
Photograph the complete C6 error code before taking any action.
Technician should confirm
Confirm C6 exactly and record which controller, gateway, or unit reported it.
You can check
Capture the Daikin indoor and outdoor model stickers and identify which controller or unit reported it.
Technician should confirm
Match the indoor and outdoor model stickers, installed family, and reporting equipment to the source scope.
You can check
The source table provides no customer reset procedure. Preserve the evidence and use the matching service manual for any system action.
Technician should confirm
Follow the matching service-manual procedure and keep measured test evidence before naming a failed part.

Source-bounded repair decision

Daikin C6 confirms the source-table fault label, not a failed part or repair procedure. Match the installed model to its service manual and require measured diagnostic evidence before approving parts, settings, or refrigerant work.

Whether the reporting controller or unit and exact installed model are confirmed.
What the matching service-manual procedure and measured tests show.
Whether the proposed repair names the evidence for the failed part or condition.

Daikin C6 questions

What does the Daikin C6 error mean?

Daikin C6 is listed as malfunction of fan motor sensor or fan control driver, indoor PCB and fan PCB combination, capacity-setting, or indoor PCB abnormality, and indoor fan-motor sensor or driver malfunction in mixed model-family source rows, including VRV X RXQ-A(N)R cooling only and Sky Air FNA R32 - indoor error overview. The loaded row is source-backed by official diagnostic material. Do not collapse this code across model families; use the model, series, or system type to choose the right row. Confirm the exact model, series, or signal row before accepting a parts quote.

Can I fix a Daikin C6 error myself?

No. C6 needs a technician's measurement before parts are decided. Photograph the complete C6 error code before taking any action. Capture the Daikin indoor and outdoor model stickers and identify which controller or unit reported it.

Is it safe to keep running the aircon with a C6 error?

Record C6 and stop there; the source table gives no customer reset procedure. Arrange diagnosis with the matching service manual.

What causes a Daikin C6 error?

Daikin C6 has source-backed wording that depends on the exact model, source row, or reporting unit. Use the decoder on this page before assuming a specific cause.

Will a Daikin C6 error need a repair or a full replacement?

Daikin C6 confirms the source-table fault label, not a failed part or repair procedure. Match the installed model to its service manual and require measured diagnostic evidence before approving parts, settings, or refrigerant work.

What should I send a technician about a Daikin C6 error?

Before booking, send: C6 error code, a clear display photo, Daikin indoor and outdoor model stickers, the controller, gateway, or unit that reported the code, operating mode and affected area, and any power or setting changes made after the code appeared.

Confirm the fault

Share the error code, model number and symptoms so we can assess the likely cause.

Not the right code?

Browse the full Daikin list or check a few codes in the same fault category.