Outdoor power system fault: the compressor stopped three times for overcurrent or start-up failure within a minute of starting. The left lamp blinks 5 times.
Mitsubishi 5 blinks on table 9-4 mean the outdoor power system. The compressor stopped for overcurrent or start-up failure three times within a minute of starting, and both units stay off. The manual points at the inverter, the compressor, and the stop valve. 3 blinks are the indoor fan. 7 blinks are the outdoor control memory.
Likely causes
- Compressor overcurrent or start-up failure, three times within a minute of starting
- Stop valve not open
Safe checks for 5 blinks
- Leave the outdoor disconnect and the breaker off. Do not reset the breaker to force another start
- Technicianthe manual points this row at the inverter and compressor checks in the outdoor service manual, and at the stop valve
Capacitors can hold a charge after the power is off. Safety terms.
When to call a pro
Five blinks mean the outdoor unit has already stopped the compressor three times. Another reset can repeat that. Call a licensed HVAC technician.
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