Error code
04 Indoor-unit check code
How it shows on the unit Shown on the remote control display in service-check mode (CHECK button); all indoor-unit lamps flash 5 times per second
Applies to 4 models
RAS-25PKVPG-ND, RAS-35PKVPG-ND, RAS-25PAVPG-ND, RAS-35PAVPG-ND
What this means
The owner's manual lists this check code under problems with the indoor unit (including wiring faults); it gives no further detail.
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.
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