Bosch · Alarm List A/W Split (8754) 2018 01 10
There is an issue with the supply cabling to the compressor, indicated by an incorrect phase sequence. The system attempts to restart every 3 minutes, but repeated errors will block further attempts.
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Refer to separate error handling instructions for Split outdoor unit, error code 26.
Verify the electrical connections to the compressor.
Contact a qualified technician.