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 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 for continuity of pump cable assembly.
Check for continuity of control circuits and 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
J9(A) and (B)
K1(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
Refer to paragraphs 3-45.
If continuity does not exist through K1 (contacts 2-3) with K1 closed or 90-120 Ohms is not