Table 2-2. Unit Troubleshooting - continued
TEST OR INSPECTION
CHEMICAL FEED PUMP ASSEMBLY -continued
PUMP ASSEMBLY IS NOISY
Isolate noise to chemical feed pump motor or pump.
If noise is coming from motor, remove motor (Paragraph 2-62) and check for defective couplings and
coupling spider. If coupling is not defective, refer motor to direct Support Maintenance.
If noise is coming from pump, notify Direct Support Maintenance.
PUMP ASSEMBLY FAILS TO OPERATE (ALL LIQUID HEAD ASSEMBLIES)
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 1. Check if circuit breaker CB7 and/or heater assembly of motor starter ,K7, are tripped. Heater assembly is
tripped if resistance is felt when reset plunger is pushed in.
If CB7 and/or heater assembly are tripped, go to step 4.
Step 2. Check for 115 VAC between contacts T1 on heater assembly and T4 on relay of motor starter K7.
If 115 VAC is not measured, notify Direct Support Maintenance.
Step 3. Turn CB7 to OFF and disconnect cable at pump (Paragraph 2-60) and at junction box (T1 and T4).
Check cable for continuity.
If cable is defective (open), notify Direct Support Maintenance.
If cable assembly is not defective (not open) replace pump motor. Refer to Paragraph 2-62.