Error code
live-operation-lamp-4-blinks-timer-lamp-8-blinks Air-clean unit reverse protection stop
How it shows on the unit Funktion (OPERATION) LED 4 blinks, Timer LED 8 blinks
Applies to 4 models
ASYB09LDC, AOYS09LDC, ASYB12LDC, AOYS12LDC
What this means
The plasma air-clean unit has stopped permanently on its reverse protection (VDD).
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.