Jewett Lab Plasma -30°C Freezer

Safety Precautions

  • Use this product only in the way described in the product literature and in this manual. Before using it, verify that this product is suitable for its intended use. If the equipment is used in a manner not specified by the manufacturer, the protection provided by the equipment may be impaired.
  • Do not modify system components, especially the controller. Use Thermo Scientific exact replacement equipment or parts. Before use, confirm that the product has not been altered in any way.
  • Your unit must be properly grounded in conformity with national and local electrical codes. Never connect the unit to overloaded power sources.
  • Disconnect the unit from all power sources before cleaning, troubleshooting, or performing other maintenance on the product or its controls. 

Do not store flammable materials in this unit.

Cleaning

To clean the drawers, use a solution of water and a mild detergent. Rinse the drawers and wipe them dry with a soft cloth. 

CAUTION: Condensers should be cleaned at least every six months. In heavy traffict areas, condensers load with dirt more quickly. Failure to keep the condenser clean can result in equipment warm-up or erratic temperatures. Never clean near condensers with your fingers. Some surfaces are sharp.

WARNING: Be sure to disconnect the unit from main power before cleaning the condenser.

In all the models, the condenser is located in the top machine compartment. To clean the condenser:

  1. Disconnect the power.
  2. Remove the top front grill.
  3. Use the vacuum cleaner with hose and brush attachments to clean the front face of the finned surface.
  4. Clean up any loose dust and replace the front grill.
  5. Reconnect the power.

Troubleshooting

Troubleshooting procedures involve working with high voltages which can cause injury or death. Troubleshooting should only be performed by trained personnel.

Cause: Power supply.

Solution:

  • Check that the cord is securely plugged in.
  • All models except undercounter models have a double pole circuit breaker located next to the power inlet. Make sure that it is in the ON ("1") position. Try cycling the switch to OFF ("0") then ON ("1").
  • Plug another appliance into the outlet to see if it is live.
  • If the outlet is dead, check the circuit breaker or fuses.
  1. Cause: Cold control.
    • Solution: Make sure that the cold control is set correctly.
  2. Cause: Condenser.
    • Solution: Make sure the condenser is clean.
  1. Cause: Door is open.
    • Solution: Maker sure the door is completely closed.
  2. Cause: Warm product recently loaded in unit.
    • Solution: Allow ample time to recover from loading warm product.
  3. Cause: Power supply.
    • Solution: Check for proper voltage to the unit. If there is no voltage to the unit, call an electrician.
  4. Cause: Compressor
    • Solution:
      • If the compressor is not running, check if the unit has a power failure alarm. If the power failure alarm light is on, have an electrician check for proper voltage to the unit.
      • If the compressor is running, open the door and look through the slotted air intake in the bottom of the evaporator cover to see if icing is present on the evaporator. If icing is present and there is not air flow behind evaporator, call technical service for assitance. The evaporator fan may be inoperative.
      • If the compressor is running and there is air flow behind the evaporator, contact an authorized service provider or call the technical support line for assistance.