TM 10-4610-239-24
TM 08580B-24/3
Table 3-1. Direct Support Troubleshooting - Continued
Malfunction
Test or Inspection
Corrective Action
REVERSE OSMOSIS ASSEMBLY - Continued
3. R.O. PUMP KNOCKS EXCESSIVELY.
Check to see if the following symptoms occur simultaneously (may indicate unseated valves):
a. Loud knocking noise.
b. Wildly fluctuating gages.
c. Pulsating and vibration of the entire ROWPU.
d. Decrease in water pressure flow.
If valves are unseated, refer to paragraph 3-54 to replace R.O. Pump Fluid end assembly
and paragraph 3-55 to repair R.O. Pump Fluid end assembly.
RAW WATER PUMP NO. 1 ASSEMBLY
WARNING
Electrical high voltage can cause serious injury or death. Some tests performed in
troubleshooting require power to be connected. Always take proper measures to ensure
personal safety.
NOTE
Ensure that all circuit breakers are set. Refer to figure FO-3 for schematic diagram and figure
2 for junction box support diagram, and figure 3-10 for raw water pump no. 1 support diagram.
PUMP ELECTRIC MOTOR FAILS TO START WHEN RAW WATER PUMP'S NO. 1 SWITCH IS
SET TO START
Step 1
Push overload plunger on K3. Set RAW WATER PUMPS NO. 1 switch to START and
release. Check position of overload plunger.
If plunger stays in, go to step 2.
If plunger does not stay in, go to step 7.
3-48
