IMP Protection Malfunction(Multi ODU)

When troubleshooting this malfunction these are the main points you should look out for:

• Is the input voltage of the unit within normal range?
• Is the compressor's connection wire connected well? Is the wire loose? Is the connection sequence correct?
• Is the resistance of the compressor coil normal? Is the isolation of the compressor coil with the copper pipe good?
• Is the unit overloaded? Is the heat radiation of the unit good?
• Is the refrigerant charge suitable?

Troubleshooting Flowchart