Error code
live-upper-operation-lamp-blink Upper operation lamp blinking
How it shows on the unit Upper operation lamp blinks in the live-operation indication
Applies to 4 models
What this means
The owner manual lists a blinking upper operation lamp among the conditions in which the unit must be stopped and the dealer contacted. The number of blinks identifies the fault — see the POWER lamp blink entries for this family.
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.