Specifications

M-Series Water Purification Machines
1238160 Rev. D 6 - 5 Troubleshooting
TROUBLESHOOTING GUIDE
Symptom Possible Causes Remedies
Low
concentrate
flow rate,
normal or
higher than
normal
pressure
Concentrate valve plugged
Concentrate outlet line
restricted
Flow meter inaccurate
Remove the concentrate
valve step and/or
disassemble the piping.
Clean the valve.
Examine the concentrate line
for obstructions or kinks;
repair or replace the tubing.
Check the flow rate manually
with a stopwatch and
calibrated container.
Pressure does
not drop when
concentrate
valve is
opened
Dirty concentrate valve Disassemble and clean the
piping to the valve
High operating
pressure
Recycle or concentrate valve
plugged
Inaccurate pressure gauge
Restricted or reduced
permeate flow rate
Disassemble the piping to the
recycle valve and remove
foreign particles. Check the
concentrate valve stem.
Replace or calibrate the
gauge as required
See the possible causes for
low permeate rate