TM 10-4610-310-14
UNIT MAINTENANCE
LIGHTWEIGHT WATER PURIFIER
TROUBLESHOOTING PROCEDURES
CHEMICAL INJECTION PUMP (HYPOCHLORITE)
Chemical Injection Pump (Hypochlorite)
The table lists the common malfunctions that you may find during the operation or maintenance of the
Hypochlorite chemical injection pump assembly P7 in the chemical injection/cleaning module used in 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
With power off, check wires 46, 3, and
ground for loose connections and
Tighten any loose connections.
damage from the chemical module
Repair and replace any broken wires.
junction box to the injection pump.
If present and the speed and stroke
controls are not at zero but the pump
With power on, check for voltage across
is not running, replace the pump. If
wire 46 and 3 at the chemical module
voltage is not present, proceed to the
junction box. (120 VAC)
next step.
Ensure input light 1 is energized at the
If not troubleshoot low-pressure
PLC.
switch. WP 0067 00.
Inspect chemical pump switch (SW10)
Put switch (SW10) in the auto position.
Tighten any loose connections.
Check connections of wire 38 on output
Repair and replace any broken or
1. Pump malfunctions
10 of the PLC to the switch, and check for
burnt wires. Replace if continuity
continuity of wire number 38 from the
doesn't exists in the wire.
PLC to the switch.
With power off, check connections of wire
Tighten any loose connections.
46 from the switch to the chemical
module junction box, and check for
Repair and replace any broken or
burnt wires. Replace if continuity
continuity of wire number 46 from the
doesn't exists in the wire.
switch to the chemical module junction
box.
Check surge protector (SP20) fault light
With power off, place switch (SW10) in
Tighten any loose connections.
auto and check for continuity between the
Repair and replace any broken or
terminal with wire 38 and the terminal with
burnt wires. Replace if continuity
wire 46.
doesn't exists in the wire.
Check PLC
0076 00-1
