To help enterprises improve the operational efficiency of cold storage equipment and extend the service life of units, focusing on the core points of daily inspections and periodic maintenance, the following are the key contents:

Check three times a day

Pressure and temperature: Pay attention to exhaust pressure (≤ 1.8MPa) and evaporation temperature
Current and voltage: current ≤ 110% of rated value, voltage fluctuation ≤ ± 10%
Equipment abnormal noise: Listen to the sound of the compressor running and check for abnormal vibration

 Periodic maintenance

1. Monthly

Replace the filter (if the pressure difference exceeds 0.1MPa, it must be replaced)
Check the refrigerant (if the bubbles in the sight glass exceed 10%, it needs to be replenished)
Check the lubricating oil (oil level 1/2, change if it changes color)

2. Quarterly

System leak detection (soap water check pipeline interface)
Calibration protection switch (high voltage 1.8MPa shutdown)
Measure motor insulation (resistance>2M Ω)

3. Annual

Compressor disassembly and inspection (seal replacement, cleaning and oil change)
Clean heat exchange equipment (air-cooled dust removal, water-cooled descaling)
Upgrade control system (update parameters, backup data)

Special Scene

Long term shutdown: Preheat lubricating oil for 24 hours before restarting
High temperature season: Increase condenser cleaning and install air deflectors
Low temperature storage: check for evaporator defrosting and prevent icing

Safety Tips

Power off operation, wear protective gloves
Record pressure and temperature data
The data shows that: Standardized maintenance can reduce the failure rate by 40% and improve energy efficiency by 12%.