Table 4-2. Unit Troubleshooting Guide (Continued)
TEST OR INSPECTION
Shut down the ROWPU. Shut down the generator. Open the external electrical panel. Check all cables and
connections from the control panel to the pump for tightness, physical damage, and evidence of water, dirt, or
arcing. Open the motor connection box and check the connections inside it.
Repair any damage found.
Check the MOVS in the external electrical panel for physical damage or shorts to ground from the power terminal.
Replace any faulty MOV's (para. 4-35).
Check for short circuits. Refer to malfunction 1, steps 3 thru 9.
Use a pump from another unit and check it for operation.
(a) If the replacement pump runs okay, continue to check the faulty pump/motor for the problem.
(b) If the problem cannot be found, notify direct support maintenance.
5. Distribution pump circuit breaker will not reset, distribution pump ground fault will not reset (Reference Schematic Diagram FO-1,
Sheet 5, schematic lines 524-530).
Notify direct support maintenance.
Change 1 4-83