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1. Fault Principle: Laboratory ultrapure water systems are designed to maintain a raw water pressure of 0.10-0.40 MPa. Below 0.1 MPa, the water flow cannot meet the equipment's operational requirements, triggering the water shortage protection.
2. Quick Troubleshooting: Open the tap corresponding to the equipment's inlet and observe if the water flow is weak; or measure the inlet pressure with a pressure gauge.
3. Solution: Check if the main tap water valve is fully open and if the inlet pipe is being squeezed by heavy objects; if the water pressure is consistently low, it is recommended to install a booster pump (compatible models are available from UPU); avoid using the equipment during peak water usage periods.
1. Fault Principle: Pretreatment filter cartridges (commonly PP, activated carbon) are the first line of defense in raw water purification. Long-term use can lead to the accumulation of rust, sediment, and other impurities, obstructing water flow.
2. Fault Principle: After turning off the power, check if the filter cartridge is blackened or has a large amount of impurities attached to its surface.
3. Solution: Replace the pretreatment filter cartridge (recommended every 3-6 months, shorten to 1-3 months in areas with poor water quality); after replacement, flush the pipeline for 3-5 minutes before turning on the machine to prevent residual impurities from entering the main unit.
1. Fault Principle: The raw water solenoid valve controls the water inlet passage. It opens when energized and closes to prevent backflow when de-energized. A malfunction will prevent water from entering the equipment.
2. Fault Principle: After energizing, approach the solenoid valve and listen for a clicking sound (a sound indicates normal power supply; no sound may indicate a power supply fault).
3. Solution: If there is a clicking sound but no water, turn off the power and disassemble the solenoid valve to clean the valve core (it may be stuck with impurities); if there is no clicking sound, please contact UPU after-sales service to check the power module or replace the solenoid valve (free replacement within the warranty period).
1. Water Shortage Protection Sensor Failure: Scale buildup or damage to the sensor probe can cause false alarms. Clean the scale from the probe surface; if the alarm persists, replace the sensor.
2. Piping Issues: Bent inlet pipes, clogged filters, or leaks in internal pipes require checking the pipe flow section by section.
3. Control System Malfunction: Incorrect PLC controller parameters or motherboard failure. Reset the equipment by restarting; if this is ineffective, contact after-sales service for remote diagnostics.
1. If the above troubleshooting methods fail, contact after-sales service for remote guidance from professional engineers.
2. UPU brand pure water machines have 30 offices nationwide with spare parts warehouses for rapid response to repair needs.
3. Regular Maintenance Reminders: UPU will proactively send filter replacement and maintenance reminders based on equipment usage time to reduce the failure rate.
