Load Bank Troubleshooting


This section is designed to aid the electrical technician in basic Load Bank system troubleshooting. All of the problems listed can be verified with a basic test meter and/or continuity tester.

COOLING FAN MOTOR WILL NOT OPERATE COOLING FAILURE INDICATED TEST METERS DO NOT OPERATE PROPERLY SOME LOAD STEPS CANNOT BE ENERGIZED LOAD OVER VOLTAGE INDICATED

Cooling fan motor will not operate

  1. Inoperative fan circuit breaker
  2. Fan/control power not available and/or incorrect
  3. Inoperative fan motor
  4. Fan motor contactor de-energized
  5. Restriction of air (intake or exhaust)
  6. Fan pressure switch inoperative
  7. Inoperative Voltage Sensing Relay (VSR), Load Voltage Contactor (LVC), and/or Load Contactor Relay (LCR) (Digital Load Banks only)
WARNING
When troubleshooting load bank systems remove all test source power, fan/control power, anti-condensation heater power, etc.