TM 10-4610-239-24
TM 08580B-24/3
Table 2-2. Unit Troubleshooting - Continued
Malfunction
Test or Inspection
Corrective Action
R.O. PUMP ASSEMBLY - Continued
3. R.O. PUMP SHUTS DOWN OR FAILS TO START - LOW PRESSURE INDICATOR LIGHTS -
Continued
Step 4.
Check that raw water strainer is not blocked by dirt or trash.
If strainer is blocked, remove dirt or trash.
If strainer is not blocked, disassemble all raw water hoses from strainer to ROWPU
control panel and remove all blockages.
4. R.O. PUMP SHUTS DOWN OR FAILS TO START - HIGH PRESSURE INDICATOR LIGHTS
Step 1. Push R.O. PUMP RESET switch to RESET and release. Push R.O. PUMP switch to
START and release. Watch R.O. PRESSURE P.S.I. gage.
If shutdown occurs at less than 1100 psi, replace high-pressure switch. Refer to
If shutdown occurs when gage reaches 1250 psi, replace high-pressure relief valve.
Refer to paragraph 2-110.
5. 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.
Notify Direct Support Maintenance
2-46
