Ultra Low Temperature Freezers Troubleshooting Guide | 35
Power failure to the unit.
Power supply stopped /
Breaker switch off.
Confirm that the cord is securely plugged in.
Plug another appliance into the outlet to see if power is
present.
Reset circuit breaker to on position and push power button
on user interface and hold for at least 1 second.
Always use a dedicated, properly grounded circuit.
For the TSX series, the ULT should not be connected to a
GFCI (Ground Fault Circuit Interrupter) protected outlet as it
may be subject to nuisance tripping.
Panel unable to supply
voltage during power
failure recovery of multiple
units.
Use different power recovery delay settings per unit.
Refer to Users Section.
Unit tripping the circuit
breaker.
Shared power source.
Never connect unit to overloaded power source. Always use
a dedicated (separate) circuit.
Unit plugged into wrong
power outlet.
Plug the unit into proper power source to deliver correct
voltage and current.
Unit not grounded.
Your unit must be properly grounded in conformity with
national and local electrical codes. Troubleshooting
procedures involving live voltage is dangerous and if done
improperly can result in injury and/or death.
This troubleshooting should be performed by trained
personnel only.
Use of GFCI for TSX units.
For the TSX series, the ULT should not be connected to a
GFCI (Ground Fault Circuit Interrupter) protected outlet as it
may be subject to nuisance tripping.
Use of extended cords.
Do not use an extension cord. Ensure the unit supplied power
cord is plugged directly into power outlet.
Panel unable to supply
voltage during power
failure recovery of multiple
units.
Use different power recovery delay settings per unit.
Refer to Users Section.
Excessive frost build-up
around
perimeter of door.
Icing/Frost due to high
relative humidity.
Check if the location meets requirements. Maximum relative
humidity 60% for temperatures within 15 °C to 32 °C
(59 °F to 90 °F).
Occasionally scrape the ice on the outer door.
Excessive and prolonged
door openings.
Avoid opening door for a prolonged time.
Gasket damage.
Check for punctures or tears on gasket. Replace if necessary.
Refer to Gasket Maintenance.
Unit is over cooling.
Setpoints may have
changed.
Adjust the setpoint to run at desired setpoint under settings.
Refer to Factory Reset in Files and Info.
Temperature offset may
have changed.
Try adjusting the offset. Temperature offset can be set in the
Controls screen under settings. Refer to Factory Reset in
Files and Info.
Unknown. Try restarting the unit. If this does not help call service.
Problem Cause Solution
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