TM 10-6640-215-13 Table 3-2.  Troubleshooting - continued MALFUNCTION TEST OR INSPECTION CORRECTIVE ACTION 22. WATER PUMP CONTINUALLY CYCLES ON AND OFF Step 1. Check system access valves for partially open valve(s). Close all access valves. Step 2. Check system piping for leaks. If leaks are found, notify unit maintenance. Step 3. Check operation of water system pressure switch. a. Adjust pressure switch.  Refer to TM 10-4320-321-13&P. b. If pressure switch will not adjust properly, notify unit maintenance. 23. WATER CHILLER FAILS TO RUN. Check and reset circuit breaker A15CB7 located in POWER PANEL NO.  2. If Chiller still fails to operate, notify unit maintenance. 24. WATER CHILLER RUNS BUT FAILS TO PRODUCE CHILLED WATER. Check and adjust thermostat. If Chiller still fails to produce chilled water, notify unit maintenance. 25. WATER HEATER FAILS TO PRODUCE HOT WATER. Check and reset circuit breaker A1CB17 located in MAIN POWER PANEL NO.  1. If heater still fails to produce hot water, notify unit maintenance. 26. DRAIN TANK OVERFLOWS (SUMP PUMP DOES NOT OPERATE). Step 1. Check to see that sump pump is plugged into convenience outlet J14. Step 2. Check and reset circuit breaker A1CB14 located in MAIN POWER PANEL. If sump pump still fails to operate, notify unit maintenance. 3-9