ABSORBER #3 REFRIG PUMP FAILURE - EMERGENCY SERVICE
SR# 1-69531626381

6/29/18:
  After running ABS#3 for approximately 4hrs, and reaching 1100 tons, at the conclusion of a routine Operational Inspection, the Refrigerant Pump Overloads unexpectedly opened. This was before it had entered Dilution Mode. The YORK controls responded appropriately by shutting off the steam and all solution pumps.
  Shut off / locked out main power to YORK Panel. Reset Refrig Pump Overloads. Reapplied power. Inrush current to motor was 47 Amps, which tripped the overloads again.
  Locked out power again. reversed phase rotation of motor (in an attempt to free the rotor, if mechanically bound). Restored power and overloads tripped again 44 Amps.
 Locked out power. Removed motor wires from starter, electrically isolating it. Inspected motor wiring at pump, winding resistance, and megohms to ground. Winding resistance balance was out of spec (likely due to partial short between phases)

 Due to the Absorber running near full load at the time of shutdown, with the majority of the refrigerant separated out of the solution (stuck in the refrigerant tank), with no means of running a normal dilution cycle, a manual dilution was require to prevent catastrophic crystallization.
  Set up hoses and portable utility pump to transfer refrigerant from the tank into the absorber section