Error code
1C Compressor drive-output fault
How it shows on the unit 8 blinks after the error is detected in failure-memory recall/service mode
Applies to 4 models
RAS-25PKVSG-ND, RAS-35PKVSG-ND, RAS-25PAVSG-ND, RAS-35PAVSG-ND
What this means
The relationship between compressor voltage, current, and frequency is abnormal, potentially due to overcharge, PMV failure, overload, or compressor failure.
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.
Using Claude Code or Meta Muse? Connect HeatPump AI and ask it about 1C.