Error code
live-upper-lamp-steady-on-outdoor-control-memory Live outdoor control-system memory fault
Applies to 12 models
MSZ-FT25VG-E1, MSZ-FT35VG-E1, MSZ-FT50VG-E1, MSZ-FT25VGK-E1, MSZ-FT25VGK-ET1, MSZ-FT25VGK-SC1, MSZ-FT35VGK-E1, MSZ-FT35VGK-ET1, MSZ-FT35VGK-SC1, MSZ-FT50VGK-E1, MSZ-FT50VGK-ET1, MSZ-FT50VGK-SC1
What this means
The outdoor inverter control system cannot correctly read nonvolatile memory, and the outdoor unit does not operate.
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 Mitsubishi Electric manual (hosted by an authorized distributor)Hosted by an authorized distributor rather than by the manufacturer. We link to manuals, we never host them.