62 Instruction Manual TProfessional Basic 06/2011
8 Trouble shooting
8.1 Slow heating and cooling
The TProfessional Basic is equipped with a strong ventilator for the cooling of the heat sink (see
also chapter 9.1). The inlet of this fan is located at the bottom side of the instrument. Be sure
that the inlet is not clogged by dust or other material (e.g. a sheet of paper placed under the
cycler can be attached to the inlet as the fan is in operation). Dust can be removed easily from
the inlet with a conventional vacuum cleaner.
8.2 Autorestart
Running programs will be continued from the same step where the power failure has happened
as soon as the power is supplied again. A message is displayed showing (a) that a power
failure occurred during the run and (b) when and at which step the program was started again:
Confirm with [OK] to close the message screen.
8.3 Autorestart due to unrecognised power failure
High voltage fluctuation can lead to an automatic restart of the thermocycler. In this case the
cycler restarts at the step where there power failure has occurred. A message is displayed
showing (a) that a power failure occurred during the run and (b) when and at which step the
program was started again (see 8.2). To avoid voltage fluctuation, do not connect the cycler to a
socket shared by a strong power consumer like a refrigerator or a centrifuge.
8.4 Adaptation of protocols from other cyclers
Since the TProfessional Basic is a fast instrument it may be necessary to reduce the heating
and cooling ramps to run protocols from other cyclers. For the setting of the heating and cooling
ramps see section 5.5.1. Alternatively, the time settings may be extended.
8.5 Releasing wheel in case of blocked lid
When the lid is in the very up or down position, it may happen that the wheel is uncoupled. In
this situation the clutch mechanism is active in both directions (clicking noise in either direction).
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