TM 10-4610-310-14
0028 00
MALFUNCTION
TEST / INSPECTION
CORRECTIVE ACTION
The arrow on the body of the
Inspect solenoid valves (V3 A,B,C
solenoid valve should be in the
and V7).
direction of the flow.
Ensure that they are installed in
3. Feed pressure too high -
proper direction and are working
continued
properly.
for unit troubleshooting procedure
Inspect check valve (V8)
Notify unit maintenance. (WP 0085
Remove the check valve and shake
it back and forth to ensure that the
ball is moving freely.
Inspect hoses and connections
Repair of replace any leaking
for good connections, kinks,
fittings. Remove blockage. Notify
breaks, debris, trash
unit maintenance.
Inspect check valve (V8)
Remove the check valve and shake
Notify unit maintenance. (WP 0085
it back and forth to ensure that the
ball is moving freely. Notify unit
maintenance.
4. Backwash pressure too high or
Inspect check valve (V4 A-C)
not pulsing during backwash
Ensure that the arrow on the body
Notify unit maintenance. (WP 0085
of the check valve is in the direction
of the flow.
Inspect flow control valve (FCV 41)
Notify unit maintenance. (WP 0090
Ensure that the arrow on the body
of the check valve is in the direction
of the flow.
Determine the problematic cycle.
1. Ensure that the backwash
pump can draw water from
a full filtrate tank or product
tank.
2. Place the mode selector
switch on the control panel
in back wash.
3. Start the LWP (no need to
Inspect solenoid valves (V3 A, B, C
start the engine).
if problem is during backwash up
4. Place the booster and
cycle and V2 A, B, C if problem is
backwash switches in
during backwash down cycle). See
AUTO.
4. Backwash pressure too high or
Ensure that they are installed in
not pulsing during backwash -
5. The LWP will backwash
proper direction and are working
"up" through valves (V3 A,
continued
properly.
B, C) for three cycles and
(The arrow on the body of the
"down" through valves (V2
solenoid valve should be in the
A, B, C) on the fourth cycle
direction of the flow.)
in that exact order.
6. Valves (A-C) are arranged
from left to right when
facing the UF junction box.
Notify unit maintenance.
for backwash up and WP 0054 00.
WP 0056 00 for backwash down)
for unit troubleshooting procedure
0028 00-2
