Troubleshooting and repair tips for small reverse osmosis water purifiers

High-pressure pump running continuously

1. Insufficient high-pressure pump pressure; cannot reach the set high pressure

2. Check valve blockage; no pure water output

3. High-pressure failure; unable to start

Machine repeatedly starts after water is full

1. Insufficient raw water pressure

2. Check valve pressure relief

3. High-pressure switch or level switch failure

4. System pressure relief

High-pressure pump operating normally, but unable to produce water

1. High-pressure pump pressure loss

2. Inlet solenoid valve malfunction, preventing water intake (no pure water or wastewater) (Is it reversed?)

3. Pre-filter clogged (no pure water or wastewater, or very little wastewater)

4. Check valve failure (wastewater present, no pure water)

5. Automatic flushing solenoid valve failure; cannot close effectively (always in flushing state)

6. Control box malfunction; cannot close backwash solenoid valve (always in flushing state)

7. RO membrane clogged

Insufficient pure water flow

1. Pre-filter clogged

2. Insufficient high-pressure pump pressure

3. RO membrane clogged

4. Wastewater valve or wastewater proportioner excessively open

5. Post-activated carbon clogged

6. Insufficient pressure tank pressure or internal damage

High-pressure pump not starting; unable to produce water

1. Check for power outage; ensure plug is inserted

2. Check if low-pressure switch has failed and cannot connect power

3. Check if water pump and transformer are shorted, or if the overall wiring is incorrect

4. Check if high-pressure switch or water level controller has failed and cannot be reset

5. Check for control box malfunction

High-pressure pump stopped, but wastewater continues to flow

1. Solenoid valve failure; cannot effectively cut off water

2. Control box malfunction; cannot close solenoid valve (for microcomputer type)

3. Check valve pressure relief (low wastewater flow)

Why is the produced pure water of poor taste or has an odor?

1. Check RO membrane filtration effect; is it reduced or ineffective?

2. Check if the pure water and wastewater ends of the RO membrane shell are separated or cracked.

3. Check if the RO membrane rubber ring is the correct size or damaged on one end.

4. Check if the post-activated carbon is effective.

What are the reasons for not reaching the required daily water production?

1. Check for calculation errors

2. Check if water pump pressure is sufficient (0.6 MPa)

3. Check if the wastewater valve or wastewater proportioner is excessively open

4. Check if the water temperature is too low

What is the reason for water leakage near the pipe joints?

1. Check if the PE pipe end is cut evenly,

2. Check if the pipe plug is inserted correctly,

3. Check if the nuts are tightened.

Pressure tank full, but pure water cannot flow out

1. Pressure tank air pressure released

2. Post-activated carbon clogged

What is the reason for abnormal noise during water machine operation?

1. Check if the check valve has failed or aged

2. Check if there is a problem with the high-pressure pump quality

What is the reason the machine is not working?

1. Possible reasons:

2. Check for power outage; ensure plug is securely inserted.

3. Check if the low-pressure switch wiring plug is loose or has failed, preventing the power contact from returning.

4. Check if the connection wires of the terminals are loose.

5. Check if the tap water pressure is too low, causing the low-pressure switch to not work

Solution:

Connect the loose plug

Replace the low-pressure switch

Install the loose connection wires