TM 10-4610-310-14
UNIT MAINTENANCE
LIGHTWEIGHT WATER PURIFIER
TROUBLESHOOTING PROCEDURES
CONTROL MODULE
HOUR METER
GENERAL
This work package lists the common malfunctions that you may find during the operation or maintenance of the
hour meter HM1on the control module front panel used in the Lightweight Water Purifier (LWP). You should
perform the tests/inspections and corrective action 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
Hour meter malfunction
Ensure that the RO system
If not present, replace the meter. If
pressure is above 160 psi.
present, proceed to the next step.
Measure the voltage across
wires 38 and 3 at the meter (120
VAC).
With power off, ensure that the
Tighten any loose connections and
wire 38 has continuity all the way
replace broken wires.
up to output 10 of the PLC.
With power off, ensure that the
Tighten any loose connections and
wire 3 has continuity from the
replace broken wires.
meter to wire 3 on the PLC.
Inspect PLC lights
Inspect low-pressure switch
END OF WORK PACKAGE
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