Otis · 400 Elevator
Indicates that the compressor is not cooling at a rate of 0.5º C per hour or better while active. This points to a performance issue with the refrigeration system, potentially due to mechanical failure or low refrigerant.
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Measure supply voltage at compressor input terminals against nominal specifications.
Verify compressor run command and operational status via system diagnostic interface.
Inspect refrigeration lines and connections for visible signs of refrigerant leaks, such as oil residue or frost accumulation.
Verify temperature sensor readings within the refrigeration circuit (e.g., suction, discharge) are accurate and within expected ranges.
Inspect condenser and evaporator coils for cleanliness and obstructions, ensuring adequate airflow.