Answer: B2AB4 (large internal current), B2AB5 (unable to start), B2AB9 (overloaded) are all faults reported by the electric compressor for self-protection.
When the air conditioning system pressure is too high, it will cause excessive load, resulting in increased starting torque and large internal current, which will eventually lead to failure to start. Therefore, when the electric compressor reports the above fault code, please first check whether the air conditioning system pressure is normal.