Phone:
0086 28 87573647
+86 19150187139
Fault Causes:
1. Water tank is full but indicator light is not on.
2. Low pump inlet pressure or no water intake ("Inlet Water Source" indicator light is off).
3. Low-pressure switch malfunction.
4. Pump malfunction.
5. Circuit board malfunction or poor pump connection.
6. Power supply malfunction.
Solutions:
1. Full water shutdown is a normal system function; check the indicator light.
2. Check and adjust the tap water pressure; install a booster pump if necessary.
3. If the pump starts when the low-pressure switch signal line is directly shorted, the low-pressure switch is faulty; repair or replace the low-pressure switch.
4. Repair or replace the pump.
5. Repair or replace the circuit board; reconnect the pump connections securely.
6. Check the power supply voltage and transformer output voltage.
When this machine malfunctions, we recommend you first try the above methods for diagnosis and troubleshooting. If the problem persists, please call our service hotline 400-884-6567 for assistance from UPU Ultrapure Water engineers.
