TQ Series Technical Manual
9.9.04 Operation and Maintenance Page 24
Rev. 5
Troubleshooting
Poor Quality
Inlet TDS too high Check inlet TDS. TQ RO is designed to operate with a ~
98% rejection. The TQ Nano is designed to operate with
a ~ 85% rejection.
Permeate flush not operating Cycle system through permeate flush by allowing the
storage tank to fill and go through a normal flush cycle.
Check flush time and volume to reject during flush.
Check reject quality at the end of the flush; it should be
RO quality.
System not operating within specifications Confirm system operating parameters see Operating
Specifications table. The system should run at provided
permeate and reject flow rates. Also check the system
pressure.
Brine seal leak Check permeate conductivity for each housing. If one
or some show poor readings, service the membranes.
Chlorine/Oxidizer damage to membranes Check inlet chlorine or ozone levels. Residual less than
0.05 mg/l is required to prevent thin film composite
membrane deterioration. Check downstream of the
prefilter.
Pressure too low (<40psi) Check and add booster pump if pressure is too low.
Membrane plugged or fouled Check, clean or replace.
Insufficient reject flow rate See “No reject water.”
Membrane expended Replace membrane.
System Not Consistently Running
Low permeate flow Water temperature is low. Plugged prefilter or low feed
psi.
Membranes are fouled.
Membranes fouled Check system log for history. If consistent declining
production is found, clean membranes. Consult your
Kinetico dealer for appropriate cleaning procedures and
chemicals.
Confirm proper system operating parameters.
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