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Error Code P0 (Module Protection)
Fault phenomenon: The operating current of the air conditioner is too high, the IPM power module components are overheating abnormally, and after working for a period of time, the display shows P0 protection;
Solution: First check whether the compressor connection wires are properly connected and check for wear or damage; if there is, make adjustments; if the wiring is good, it may be an issue with the electric control or compressor, and it needs to be analyzed whether the electric control or compressor is damaged: if after powering on, you can hear the compressor making a humming sound but it cannot start, and the electric control automatically cuts off power, try to start again after 3 minutes, but it still cannot start, it preliminarily indicates that the electric control is fine, and the compressor may be stuck or demagnetized, requiring a compressor replacement.
When replacing the compressor, it must be the same model compressor. If it is not compatible with the original electric control or compressor, it may cause the air conditioner to not operate normally. If after powering on, you do not hear or see the compressor attempting to start, it preliminarily indicates that there is a problem with the electric control, so replace the electric control first.
Warning: When replacing the outdoor electric control, be sure to replace it with the corresponding electric control for the compressor, and the compressor connection wires must be correct; if the compressor connection wires are connected incorrectly, the compressor will reverse, which will eventually lead to demagnetization due to excessive compressor temperature. After replacing the electric control, be sure to check if it operates normally.
When the temperature is very low (voltage is normal), the compressor cannot start normally and continues to make a humming sound, and increasing the compressor starting capacitor or tapping the compressor does not solve the problem, it can be determined that the compressor has poor low-temperature starting. The occurrence of poor low-temperature starting is generally due to the compressor itself, and in this case, a new compressor needs to be replaced.
Note that inverter units do not have a compressor starting capacitor. Note: Midea’s current inverter units heat the accumulated refrigerant by inputting a small current to the compressor at startup through the coil.
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