Troubleshooting

If you encounter issues with your unit, refer to the following table or contact tech@usalab.com at USA Lab.

See Contact information.

Troubleshooting for the Recirculating Chiller - UC Series.

Problem

Possible cause

Solution

No power

  1. The chiller is not plugged in.

  2. There is no power from the outlet.

  3. There is power in the outlet, but not in the chiller.

  1. Plug in the chiller.

  2. Reset the breaker or GFCI. Call an electrician.

  3. Unplug the chiller, open the rear panel, and check for damage.

Incorrect temperature display

  1. The probe wire is loose.

  2. The temperature probe has a short circuit.

  3. The display board has failed.

  1. Repair the loose wire.

  2. Replace the temperature probe.

  3. Replace the display board.

Temperature display not working correctly or flashing

  1. Incorrect supply voltage.

  2. The power board has failed.

  1. Verify the power supply matches the requirements.

  2. Replace the power board.

Shock from the unit shell

  1. Faulty system grounding.

  1. Repair the fault in system grounding.

No cooling

  1. Cooling is not enabled.

  2. The condenser fan is not spinning.

  3. The compressor does not start.

  4. The refrigerant has leaked.

  1. On the display, press the cooling button.

  2. Replace the condenser fan.

  3. Check the capacitors, relay, and power board.

  4. Call an HVAC technician to repair and recharge the system.

Cooling slowly or warming

  1. The compressor has stopped.

  2. The condenser fan is not spinning.

  3. The glycol ratio is incorrect.

  4. The capillary or refrigerant are blocked.

  5. The liquid pump is running slowly.

  6. The load is greater than the chiller can handle.

  7. The tubing lines are not insulated.

  1. Wait 5 to 10 minutes for the compressor delay to end.

  2. Replace the condenser fan.

  3. Do not use more than 60 % glycol in your blend.

  4. Call an HVAC technician to repair and recharge the system.

  5. Re-prime the liquid circulation pump or remove the restriction.

  6. Reduce the heat load on the chiller.

  7. Use the supplied line insulation to prevent thermal loss.