Daily Maintenance Essentials
Before starting and after shutting down the equipment daily, spend five minutes completing the following checks to catch initial problems in time.
Pressure and Temperature Check: Observe the values of inlet pressure, outlet pressure, and evaporation temperature on the panel. Normally, inlet pressure should match the air compressor outlet pressure, and outlet pressure should be slightly lower than inlet pressure. The evaporation temperature must be stable at two to five degrees Celsius.
Automatic Drain Check: The drain is the equipment moisture exit. Once blocked, condensate flows back into compressed air, causing dehumidification failure. Check whether the drain discharges water regularly.
Equipment Appearance Check: Check the body for condensate leaks and whether pipe connections are loose. After starting, listen to the compressor running sound.
Weekly Cleaning Tasks
Pre-filter Element Cleaning: The pre-filter filters large particles of dust and oil from compressed air. If the filter element is blocked, it increases intake resistance. Clean by closing inlet and outlet valves, releasing pressure, and removing the filter element.
Heat Sink Cleaning: The dryer condenser dissipates heat through heat sinks. If dust accumulates in the gaps, heat dissipation efficiency drops. Clean using compressed air along the heat sink gaps.
Monthly Deep Inspection
Refrigerant Level Check: Refrigerant is the blood of the refrigeration system. Check the sight glass. Normally the level should be at half to two-thirds of the sight glass with no bubbles.
Compressor Lubricating Oil Check: Check the compressor oil level observation window. The level should be between minimum and maximum marks. If below minimum, add the same model of refrigeration oil.
Common Faults and Solutions
Fault 1: Poor Dehumidification
Causes include blocked automatic drain, insufficient refrigerant, or evaporator frosting. Solutions: clean or replace the drain; check refrigerant level; adjust thermostat setting to two to five degrees Celsius.
Fault 2: Excessive Pressure Drop
Causes include blocked pre-filter or post-filter elements. Solutions: replace filter elements; check piping for blockages.
Fault 3: Compressor Fails to Start
Causes include abnormal power voltage, high-pressure protection triggered, or contactor failure. Solutions: measure power voltage; clean condenser; check contactor coil resistance.
Maintenance Misconceptions to Avoid
Avoid these common misconceptions: neglecting maintenance because dehumidification seems adequate; repeatedly blowing and reusing filter elements without replacement; adding refrigerant without checking for leaks; blocking the drain outlet when leaking; and focusing only on cleaning without checking parameters.
