TM 10-4610-310-14
OPERATOR MAINTENANCE
LIGHTWEIGHT WATER PURIFIER
TROUBLESHOOTING PROCEDURES
REVERSE OSMOSIS ELEMENT MODULE
GENERAL
The table lists the common malfunctions that you may find during the operation or maintenance of the
Lightweight Water Purifier (LWP) Reverse Osmosis (RO) element module or its components. You should
perform the tests/inspections and corrective actions in the order listed.
This manual cannot list all malfunctions that may occur, nor all tests or inspections and corrective actions. If a
malfunction is not listed or is not corrected by listed corrective actions, notify your supervisor.
MALFUNCTION
TEST / INSPECTION
CORRECTIVE ACTION
If the feed water TDS is higher than
45,000 ppm, bypass the vessels 6
and 7 by opening their sample
Measure the source water TDS
valves all the way and drain out the
permeate with higher concentrate
from the final product.
Inspect the operating parameters
and compare to the limits in WP
Clean membranes (WP 0043 00)
1. Total Dissolved Solids (TDS) too
high
Sample TDS from each individual
membrane using the sample
valves. The TDS should Increase
Replace membrane with high TDS
from front end to the tail end. A
sudden increase in TDS reading
indicates a faulty membrane
Check when replacing membranes
Inspect the O-rings from the high
TDS vessel
needed.
Inspect the operating parameters
Clean membranes (WP 0043 00)
and compare to the limits in WP
2. Operating pressure increasing
Inspect all hoses for kinks or
Remove blockage
blockage
Check flow rates
Verify (WP 0011 00)
END OF WORK PACKAGE
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