GE E4H Series Operation And Maintenance Manual page 25

Symptom (Alarm)
Low permeate flow
rate
Low concentrate flow
rate, normal or higher
than normal pressure
High operating
pressure
E4H Series
Operation & Maintenance Manual
TROUBLESHOOTING GUIDE
Possible Cause
Low operating
pressure
Dirty or fouled
membranes
Operating on cold
water less than 55 -
60°F (13 - 16°C)
Membranes installed
backwards or
damaged concentrate
seal
Flow meter inaccurate
Valve position
Concentrate valve
plugged
Concentrate outlet line
restricted
Flow meter inaccurate
Recycle or concentrate
lines plugged
Inaccurate pressure
gauge
Service and CIP valves
closed at the same
time
Restricted or reduced
permeate flow rate
Remedies
See the possible causes for low
operating pressure.
Clean the membranes.
Install a hot/cold feed water
tempering valve if more permeate
flow is needed. Operate with a feed
water temperature of 72 - 77°F (22 -
25°C).
Install membranes in the direction of
fluid flow. Clean the machine
immediately.
Membranes with damaged
concentrate seals should be
cleaned.
Check the flow rate manually with a
stopwatch and calibrated container
(such as CIP tank).
Check CIP and outlet valve positions
for correct orientation.
Disassemble and the clean the
plumbing to the valve.
Examine the concentrate line for
obstructions or a closed valve.
Check the flow rate manually with a
stopwatch and calibrated container.
Note: CIP tank can be used for this
purpose.
Disassemble the plumbing to the
recycle orifice and remove foreign
particles.
Replace or calibrate the gauge as
required.
Verify water path to both is open.
See the possible causes for low
permeate flow rate.
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