TM 10-4610-241-24
TO 40W4-13-42
Table 2-2. Unit Troubleshooting-continued
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
PIPING INSTALLATION - continued
5. HIGH-PRESSURE LIGHT ILLUMINATES.
Start ROWPU and observe R.O. pressure gage and high pressure light.
a.
If light comes on at 1250 psi, replace high pressure relief valve (Paragraph 2-5 1).
b.
If light comes on below 1250 psi replace high pressure switch. Refer to Paragraph 2-58.
6. LOW-PRESSURE LIGHT ILLUMINATES.
Step 1.
Check and see if booster pump and both raw water pumps, operate.
a.
If booster pump is not operating, go to Malfunction 1, Booster Pump Assembly.
b.
If raw water pump No 1 is not operating go to Malfunction 3, Raw Water Pump Assembly No 1.
b.
If raw water pump No 2 is not operating go to Malfunction 3, Raw Water Pump Assembly No 2.
Step 2.
Shut down generator.
Step 3.
Remove cover from low pressure switch (Paragraph 2-57) and disconnect wire from NC contact of switch.
Step 4.
Make a continuity check between C and NC contacts of switch.
a.
If continuity exists, indicating a shorted switch, replace low pressure switch. Refer to Paragraph 2-58.
b.
If continuity does not exist, notify Direct Support Maintenance.
7.
UNABLE TO JOG RO. PUMP.
Notify Direct Support Maintenance if this malfunction occurs.
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