Watts R4X40-3 - Manual (Page 13)

RO SYSTEM TROUBLE SHOOTING
PROBLEM REMEDY
General
High Product Water TDS
Membrane frozen, high temp, or backpressure. Replace membrane.
Membrane attack by chlorine Carbon pre-filter may be exhausted. Replace filter and membrane.
Product seal on end cap. Determine if seal or o-ring is bad. Replace as needed.
No Product Water or Not Enough Product Water
Feed water shut off. Turn on feed water.
Low feed pressure. Feed pressure must be at least 10 psi. Consider booster pump.
Pre-filter cartridge clogged. Replace pre-filter cartridge.
Membrane fouled. Determine and correct cause; replace or clean membrane.
Product check valve stuck. Clean or replace check valve.
Low pump discharge pressure
Low feed water temperature Adjust reject valve or replace pump
Increase membrane feed pressure or heat the feed water.
IV. REPLACEMENT PARTS LIST
A list of common replacement parts is provided below. Contact your dealer for replacement
parts assistance.
Part Number Description
FPMB5-20 Prefilter, 5 micron, melt blown
R9622-WLE RO membrane, low energy
R2451 Prefilter pressure gauge 0 – 100 psi
PG20B25 Pump discharge pressure gauge 0 – 300 psi
R4507 Product flow meter 0.5 – 5 gpm
R5316 Reject flow meter with valve 0.5 – 5 gpm
WDM-2 Water quality meter
R6316-HPS7D Pump & motor 0.75 HP for R4X40-1
R6316-HPS7E Pump & motor 1.0 HP for R4X40-2
R6316-HPS10F Pump & motor 1.5 HP for R4X40-3
R23-1070S Controller with on/off switch (R4X40-1)
R23-1072S Controller with on/off switch (R4X40-2 & R4x40-3)
R2316-PS32 Low pressure switch, ¼” MPT
T1100 Recycle needle valve PVC
R2482-120 Inlet solenoid valve, ¾”, 120 volt coil
R96-PV-4040-OS Pressure vessel with end caps, 316 SS