Load Bank Troubleshooting

Below are a few general troubleshooting tips to help you resolve issues that may arise while using our load bank equipment. For immediate technical support at any time (24 x 7 x 365), call 855-767-5483.

Load Bank cooling motor will not operate | Load Bank test meters will not operate properly
Load steps cannot be energized | Load overvoltage error indicated on controls.


LOAD BANK COOLING MOTOR WILL NOT OPERATE

Symptoms

  • When the unit is turned on, the controls light-up but the fan does not operate.
  • When the unit is turned on, the controls indicate a fan cooling error.
  • The fan operates for a brief period and then shuts off.

Possible Solutions

Cause Things to Try
Circuit breaker tripped (on some models) or fuse blown. Reset circuit breaker or replace fuse.
Fan/control power not available and/or incorrect. Check that power cord is plugged into a power source.
Check that power source is correctly rated (i.e. 120v, 15A).
Airflow into or out of fan area restricted. Remove any objects preventing airflow. Reset circuit breaker or fuse (if blown) and restart the load bank.

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LOAD BANK TEST METERS WILL NOT OPERATE PROPERLY

Symptoms

  • Test meters do not show the correct vlaues.
  • Test meters are blank or do not turn on.

Possible Solutions

Cause Things to Try
Meter voltage selector switch in wrong position. Switch the selector to the correct position and re-check the meter values.
Cables connected to wrong phase. Check that each phase cable is connected to the correct phase receptical on the power source. Correct as necessary and re-check the meter values.

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LOAD STEPS CANNOT BE ENERGIZED

Symptoms

  • You are not able to attain the desired capacity for your test.
  • Load is not applied when one or more steps are engaged.

Possible Solutions

Cause Things to Try
Load element burned out. Contact your SOS representative or the SOS Hotline to engage a technician to replace the element.
Fuse for the affect load step(s) has blown. Contact your SOS representative or the SOS Hotline to engage a technician to replace the fuse(s). Restart the test and confirm proper operation of the affected step(s).

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LOAD OVERVOLTAGE ERROR INDICATED ON CONTROLS

Symptoms

  • Load removed from test without operator involvement.
  • Load controls indicate an overvoltage error.

Possible Solutions

Cause Things to Try
Incorrect voltage (load source) applied to the load bank. Shutdown load bank and verify voltage of power source. Correct as necessary and begin load testing again.
Load bank voltage selector set for the incorrect load source voltage. Confirm the voltage from the load power source and switch the load bank voltage selector to the correct setting.

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