TM 10-4610-241-24
TO 40W4-13-42
Table 2-2. Unit Troubleshooting-continued
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
PIPING INSTALLATION
WARNING
ROWPU piping and components may contain extremely high pressure during and after
operation. If this pressure is not relieved before working on pipes or equipment, serious
injury or death may occur. Be sure to open all drains and vents before beginning any
work.
1.
HIGH PRESSURE RELIEF VALVE FAILS TO OPERATE.
Replace high pressure relief valve (Paragraph 2-5 1) if this malfunction occurs.
2.
HIGH-PRESSURE RELIEF VALVE OPENS BELOW 1100 PSI.
Replace high pressure relief valve (Paragraph 2-5 1) if this malfunction occurs.
3.
RUPTURE DISK RUPTURES (Models WPES-10, WPES-20 and WPES-30 only).
Replace rupture disk (Paragraph 2-32). high pressure switch (Paragraph 2-58) and high pressure relief
valve (Paragraph 2-5 1) if this malfunction occurs.
4. VENT LINE/VALVE OBSTRUCTED.
Step 1.
From operator, or by operating the unit, determine which line or lines are obstructed.
If all lines are obstructed (no water flows from discharge tube when vent valves are open), disconnect
tubing downstream of valves (Paragraph 2-39) and remove obstruction from downstream tubing and
fittings.
Step 2.
Shut down ROWPU and disconnect upstream tubing at valve in faulty branch. Refer to Paragraph 2-38.
Step 3. Briefly operate ROWPU and check for water now from disconnected tubing,
a.
If water flows from disconnected tubing, clean and/or replace valve. Refer to Paragraph 2-38.
b.
If no water flow is noted, remove obstruction from upstream tubing.
2-12 Change 1
