Table 2-2. Unit Troubleshooting - continued
TEST OR INSPECTION
BACKWASH PUMP ASSEMBLY
PUMP IS NOISY.
Check for loose external pump components.
If external components are loose, tighten them.
If no loose external components are found, replace centrifugal pump Refer to paragraph 2-18.
PUMP RUNS HOT.
Replace centrifugal assembly if this condition occurs Refer to paragraph 2-18.
PUMP SHUTS DOWN AND/OR FAILS TO START IN R.O. ELEMENT CLEANING OPERATION.
High voltages in this equipment can cause serious injury or death When applying
power during a test, take proper measures to ensure personal safety. Never work
on electrical equipment unless there is another person nearby who is familiar with
the operation and hazards of the equipment and who is competent in
administering first aid.
Check if CB2 or K2 heaters in junction box are OFF.
IfCB2 and/or K2 heaters are OFF, go to step 3.
If CB2 and/or K2 heaters are not OFF, go to step 2.
Disconnect pump at BACKWASH PUMP jack, J2 and check for 208 VAC three phase power at J2.
If 208 VAC is not measured in all three tests (A-B, B-C and A-C), notify Direct Support Maintenance.
If 208 VAC is measured In all three tests, go to step 3.