Table 3-1. Direct Support Troubleshooting- continued
TEST OR INSPECTION
REVERSE OSMOSIS (R.O.) PUMP ASSEMBLY - continued
High voltages in this equipment can cause serious injury or death. When applying power
during a test, take proper measures to ensure safety of personnel. Never work on
electrical equipment unless there is another person nearby who is familiar with the
operation and hazards of the equipment.
Step 7. Disconnect cable assembly at pump motor and check it for continuity (Paragraph 2-54).
If continuity does not exist, repair cable assembly. Refer to Paragraph 3-26.
If continuity exists, repair motor. Refer to Paragraph 3-43.
Step 8. Check for continuity of control circuits as follows. Make additional point-to-point check as necessary to
isolate fault to a specific component:
To check continuity through K1, it is necessary to physically push up relay plunger while
making the check.
J9(A) and (B)
K11(A1) (See note above)
K1(A2) (Required value is 90-120 Ohms).
If continuity does not exist through switches S13 or S1 (switches ON), replace defective switch.
to Paragraphs 3-49.
If continuity does not exist through CB9 (CB ON), replace it. Refer to Paragraph 3-53.
If continuity does not exist through heater assembly, replace heaters (Paragraph 3-61) and reset