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 TM 55-1905-223-24-18-1
Table 2-2.
Troubleshooting - CONT
Malfunction
Test or Inspection
Corrective Action
POTABLE WATER PIPING SYSTEM - CONT
NOTE
If cavitation or vapor lock should occur, widely
fluctuating discharge pressure will be noted.
a.
Prime pump as follows:
(1) Push stop button on engine room console panel.
(2) Remove casing vent plug.
(3) Fill casing with water and install vent plug.
( 4 ) fill suction piping with water.
NOTE
Suction piping must be completely full to get a good
prime.
Push start button on engine room console panel.
(5) Operate pump.
STEP 5.
Pump casing or discharge line clogged.
a.
Clean pump casing.
b.
Clean or replace discharge line.
STEP 6. Check pump for wrong direction of rotation.
Refer to Malfunction 216, Step 14.
STEP 7. Pump speed too low.
Refer to Malfunction 216, Step 15.
STEP 8.
Pump not rotating.
Check for open pump motor circuit breaker. Reset circuit breaker at
a.
Main Switchboard.
Check for defective motor controller. Refer to MOTOR CONTROLLER
b.
troubleshooting Malfunction 201, Steps 1 through 3.
Check for defective pressure switches. Refer to Malfunction 216, Step
C.
12.
Check all electrical connections to motor.
d.
Check voltage, phase, and frequency on motor with specifications on
e.
motor nameplate.
STEP 9. Pump impeller clogged or damaged.
a. Replace pump, para 2-95.
No hot water.
215.
2-162
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