Error code
live-operation-lamp-off-timer-lamp-3-blinks Serial communication fault during operation (indoor side)
How it shows on the unit OPERATION lamp (red) off, TIMER lamp (green) 3 blinks of 0.5 s, repeating
Applies to 10 models
ASYA07LCC, ASYA09LCC, ASYA12LCC, ASYA14LCC, ASYA18LCC, AOYR07LCC, AOYR09LCC, AOYR12LCC, AOYR14LCC, AOYR18LCC
What this means
During operation the indoor unit stops receiving the outdoor unit's signal (serial reverse-transfer fault).
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 Fujitsu manual (hosted by an authorized distributor)Hosted by an authorized distributor rather than by the manufacturer. We link to manuals, we never host them.