ENG 22
FAILURE EXPERIENCED
REASON SOLUTION METHOD
• The power source is not connected.
• Low inlet water pressure or no water.
• Low-pressure switch failure, cannot connect the power
source.
• High-pressure switch cannot be restored.
• Switch Mode Power Supply is burned out.
• High-pressure pump burned out.
• Transformer burned out.
• No output voltage from control PCB
• High-pressure pump has lost pressure.
• A pre-lter is blocked.
• Check valve is blocked. (waste water, no pure water)
• The RO Membrane is plugged.
• Inlet water valve is faulty, no water can get in.
• Control PCB cannot shut off ushing valve.
• Check valve has lost pressure.
• High-pressure switch failure.
• System is exhibiting a loss of pressure.
• Pre-lter is plugged.
• RO membrane is plugged.
• Inlet water solenoid valve failure.
• Check valve is plugged.
• PAC lter is plugged.
• High pressure pump pressure is not enough.
• Storage tank doesn’t have enough pressure.
• PAC lter is plugged.
• High-pressure pump pressure is not reaching 0.3MPa,
the storage tank internal pressure cannot reach the set
high pressure.
• Flush solenoid valve failed, cannot effectively
cut off the water supply.
• Check valve has lost pressure. (small W.W. ow rate)
• High-pressure problem.
• High-pressure pump has lost pressure.
• Inlet water solenoid valve is faulty.
• Check the power source or the power source plug.
• Check the inlet water pressure.
• After connecting the inlet water, measure the resistance,
replace.
• After letting off the pressure, measure the resistance,
replace.
• Measure the output voltage, replace.
• Replace the high-pressure pump.
• Check the transformer input voltage/overload.
• Measure the output voltage, replace.
• Replace the pre-lter.
• Wash or replace the RO membrane.
• Replace the Inlet water solenoid valve.
• Replace the check valve.
• Replace the PAC lter.
• Measure the high pressure pump water pressure, replace.
• Measure the water pump pressure, replace.
• Observe the pure water and waste water, replace the pre-lter.
• Replace the check valve.
• Clean or replace the RO membrane.
• Replace the inlet water valve.
• Measure input voltage for ushing valve, replace control PCB
• Replace the check valve.
• Replace the high pressure switch.
• After checking the check valve, check whether
there is water leakage in the pipelines.
• Inate the storage bucket, empty tank pressure
should be between 0.05 and 0.07MPa.
• Replace the PAC lter.
• Measure the pressure from the water pressure pump,
replace.
• Observe the waste water, replace the Flush solenoid valve.
• Observe the waste water, replace the check valve.
• Measure the pressure.
• Measure the water pump pressure, replace.
• Replace the Inlet water solenoid valve.
The machine will not
start
The high pressure pump
is working properly,
but no water is being
produced
The storage tank is full
but no pure
water is owing out
The machine is turned off
but waste water has not
stopped
The machine produces
continuous pure water
After the machine is
lled with water, the
machine starts repeatedly
The pure water ow is
small or not owing
Troubleshooting Guide