TM 10--3510--221--24
0050 00--2
WATER SUPPLY PUMP DOES NOT TURN ON -- Continued
0050 00
9. Check circuit breaker CB5.
Is CB5 tripped?
YES Check for shorted wire or connection between CB5, water supply pump contactor, and water
supply pump.
NO Go to step 10.
10. Use maintenance menu turn on water supply pump while monitoring corresponding LED on SSR PCB3.
Does LED come on?
YES Go to step 11.
NO Go to TYPICAL AC OUTPUT SIGNAL FAULT (WP 0104 00).
11. Use maintenance menu turn on water supply pump while checking for >100 VAC between output terminal
on SSR PCB3 and TB1 terminal (N).
Is >100 VAC present?
YES Go to step 12.
NO Go to TYPICAL AC OUTPUT SIGNAL FAULT (WP 0104 00).
12. Use maintenance menu turn on water supply pump while checking for >100 VAC between water supply
pump contactor terminals (A1) and (A2).
Is >100 VAC present?
YES Go to step 13.
NO Go to step 18.
13. Use maintenance menu to turn off water supply pump then check for >200 VAC across water supply pump
contactor input terminals (L1 and L2), (L1 and L3), and (L2 and L3).
Is >200 VAC present?
YES Go to step 14.
NO Go to step 22.
14. Use maintenance menu to turn on water supply pump then check for >200 VAC across water supply pump
contactor output terminals (T1 and T2), (T1 and T3), and (T2 and T3).
Is >200 VAC present?
YES Go to step 15.
NO Replace water supply pump contactor (WP 0220 00).
15. Use maintenance menu to turn on water supply pump then check for >200 VAC across water supply pump
overload relay output terminals (T1 and T2), (T1 and T3), and (T2 and T3).
Is >200 VAC present?
YES Go to step 16.
NO Replace water supply pump overload relay (WP 0221 00).
16. Position SW2 then SW1 to OFF.
