TM 10-4610-240-24
TM 08580C-24/2
TO 40W4-13-22
Table 3-1. Direct Support Troubleshooting - continued
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
CHEMICAL FEED PUMP
1. CHEMICAL FEED PUMP STOPS AND/OR FAILS TO START.
WARNING
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 1. Check if circuit breaker, CB7 and/or heater assembly are tripped
if circuit breaker or heater assembly is tripped, go to Malfunction 2, Chemical Feed
pump
Step 2. Check if other pumps operate
If other pumps are inoperable, go to Malfunction 1, ROWPU Assembly
Step 3. Check if relay, K7 is ON
If relay is not ON, go to step 7
Step 4. Check if 115 VAC is available at T1 of heater assembly
If voltage is measured, go to step 6.
Step 5. Perform a continuity check of power circuit as follows, make additional point to point
checks as necessary to find defective component
NOTE
To check continuity through K7, it is necessary to physically close
contact by pushing in on relay plunger while making the check
L1, CB6 - T1 on Heater
L2, K7 - T4 on K7
J1/JIO(N) - L2
a If continuity is absent through heater assembly, replace defective heater (para 3-48) and reset
heater assembly
3-32
