ULT unit may be experiencing any of the following:
- Unit warming.
- Unit set to –80°C but can’t make temperature(Not reaching setpoint).
- Unit recovers slowly to set point.
TSX Ultra Low Temperature (ULT) Series:
Thermo Scientific – TSX40086A
Thermo Scientific – TSX40086D
Thermo Scientific – TSX40086V
Thermo Scientific – TSX40086G
Thermo Scientific – TSX50086A
Thermo Scientific – TSX50086D
Thermo Scientific – TSX50086V
Thermo Scientific – TSX50086G
Thermo Scientific – TSX60086A
Thermo Scientific – TSX60086D
Thermo Scientific – TSX60086V
Thermo Scientific – TSX60086G
Thermo Scientific – TSX70086A
Thermo Scientific – TSX70086D
Thermo Scientific – TSX70086V
Thermo Scientific – TSX70086G
Possible Causes and Solutions:
Cause : Warm load / Over load.
Solution: Allow ample time to recover from loading warm product. Do not overload cabinet.
Cause: Hot environment.
Solution: Check, if the location meets ambient requirements (within 15°C to 32°C or 59°F to 90°F) and away from hot objects.
Cause: Dirty condenser and condenser filter.
Solution: Clean condenser and filter.
Cause: Not enough space for air circulation.
Solution: Install the unit in a level area free from vibration with a minimum of 8 inch (20 cm) of space on the top and sides, 6 inch (15 cm) in back.
Cause: Icing/Frost due to high relative humidity.
Solution: Check if the location meets requirements. Maximum relative humidity 60% for temperatures within 15°C to 32°C (59°F to 90°F).
Cause: Excess frost build-up in chamber.
Solution: Defrost the unit.
Cause: Frost build-up on outer door gasket.
Solution: Occasionally scrape the ice on the gasket.
Cause: Gasket damage.
Solution: Check for punctures or tears on gasket. Replace if necessary.
Cause: Prolonged door openings.
Solution: Avoid opening of door for longer duration. Allow ample time for recovery after door opening.
Cause: Inadequate power supply.
Solution: Check for proper voltage to the unit.
Call Service if either one of the compressors are not working and/or if refrigerant is insufficient.