TM 10-4610-310-14
UNIT MAINTENANCE
LIGHTWEIGHT WATER PURIFIER
TROUBLESHOOTING PROCEDURES
CONTROL MODULE
INTIAL SETUP
Equipment Condition Required
All equipment de-energized
Control Module
The table lists the common malfunctions that you may find during the operation or maintenance of the control
module and its components used in the Lightweight Water Purifier (LWP). 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.
WARNING
When checking for voltage on an energized component, extreme care must be taken. Only qualified and
authorized electrician should maintain, troubleshoot, and operate energized equipment. Injury or death to
personnel may result.
MALFUNCTION
TEST / INSPECTION
CORRECTIVE ACTION
Check connections of wire 36 from
output 7 of the PLC output card 1 to
valve V7. Check for continuity of
wire 36 from the PLC output card 1
Tighten any loose connections.
to valve V7. Wire 36 is Pin I on
Repair and replace any broken or
cable 6 between the control module
burnt wires. Replace if continuity
and the UF module and is the black
doesn't exists in the wire.
wire with a green stripe in the UF
module junction box.
1. UF filtrate tank is not filling up
Check connection and continuity of
(solenoid valve V7 malfunction)
Tighten any loose connections.
wire 3 on valve V7. Wire 3 is Pin J
Repair and replace any broken or
on cable 6 between the control
module and the UF module and is
burnt wires. Replace if continuity
doesn't exists in the wire.
the black wire with an orange stripe
in the UF module junction box.
Check surge protector (SP19) fault
light
Check PLC.
With power off,
Check connections of wire 22 on
output 0 of the PLC from the PLC to
Tighten any loose connections.
2. Air shutoff solenoid valve
the control relay (CR2), and check
Repair and replace any broken or
(SV1)
for continuity of wire number 22
burnt wires. Replace if continuity
from the PLC to the control relay.
doesn't exists in the wire.
0068 00-1
