1. Significant decrease in cooling efficiency and COP in the LiBr absorption chiller, which may be caused by dirt or scaling inside the inner chamber, affecting the heat exchange process.
2. Drop in vacuum level, where the system is unable to maintain the required low pressure, leading to unstable performance of the LiBr absorption heat pump.
3. Contamination of the lithium bromide solution, such as turbidity, precipitation, or discoloration, indicating the presence of impurities or corrosion products in the LiBr absorption chiller.
4. Signs of internal corrosion or leakage are detected in the LiBr absorption heat pump. In such cases, cleaning may be necessary along with repair work.
5. Extended periods without maintenance may necessitate cleaning of the LiBr absorption chiller, as part of a regular maintenance program to ensure optimal performance.