Error code
A1 Indoor-unit circuit-board fault
Applies to 3 models
FVXM25FV1B9, FVXM35FV1B9, FVXM50FV1B9
What this means
The indoor unit control circuit board is malfunctioning.
When to call a technician
This fault involves refrigerant, pressure, or electrical work that must be handled by a certified technician under EU F-gas rules. Do not attempt to open the refrigerant circuit, access mains wiring, or adjust pressure components yourself. Contact a qualified installer or servicer for this one.
See the official Daikin manualA deep link to the manufacturer's own PDF for full technical detail. We link to manuals, we never host them.
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