MHI · Air Conditioning
During startup or operation, the outdoor unit's LED1 (green) blinks twice and LED2 (red) blinks three times alternately, indicating that an undefined error code has been detected.
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Re-check the error by turning off the main power supply, waiting a few moments, and then turning it back on.
Check for any other visual or audible signals that might provide more information.
If the error persists and no other codes are present, contact a qualified service technician.