Inlet tap is closed
Low water pressure
Pre‑filter clogged
RO membrane choked
Ensure inlet tap is fully open
Check if building water supply is available
Clean/replace pre‑filter
Contact service for membrane check
Sediment filter blocked
Carbon filter saturated
Low pressure from source
Replace sediment filter
Replace carbon filter
Ensure Zero Pressure Pump is ON
Carbon filter exhausted
Copper infusion too high
Tank not cleaned
Replace carbon filter
Flush 5–7 litres
Clean storage tank
RO membrane blocked
Pump not running
Float valve stuck
Replace RO membrane
Check power supply
Reset float valve
Loose wiring
LED PCB fault
Restart purifier
Contact service technician
Copper module over‑infusion
Flush 10 litres
If persists, request module calibration