Table 3-1. Direct Support Troubleshooting - continued
TEST OR INSPECTION
BACKWASH 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
Step 6. Check for continuity through pump cable assembly.
b. If continuity does not exist, repair pump cable assembly Refer to paragraph 3-4.
Step 7. Check for continuity through control circuit as follows, make additional point-to-point checks as necessary to
isolate fault to a specific component
To measure continuity through K6 contacts, it is necessary to close contacts by physically raising
handles on side of relay.
J9(D) and (W)
K2(A2) (See above note)
K2(A2) (Required value is 90-120 ohms)
a. If switchS13 or S3 is open (switches ON), replace it. Refer to paragraph 3-45.
b. If continuity does not exist through CB9 (CB9 ON), replace CB9. Refer to paragraph 3-49.
If continuity does not exist through heater assembly, replace defective heaters (para 3-49) and reset heater