Troubleshooting - Grant SCIENTIFIC Optima T100 Bedienungsanleitung

11.0 Troubleshooting

Symptom Possible cause
Display shows Over-temperature
"Cut" cut-out has operated
Temperature Set temp is lower
does not rise than liquid temp
when expected
Set temperature is
too close to ambient
Temp continues Set temp is higher
to rise when not than liquid temp
expected
Alarm light on Over-temperature
cut-out has operated
Low liquid level float
switch has operated
Set temperature Liquid type set does
too restricted not allow required set
point
Display shows Liquid level has
"Flot" dropped below
minimum level
Display shows High temperature
"–Al-" warning alarm has
tripped
Display shows Incorrect calibration
"Er H" value
Display shows Incorrect calibration
"Er L" value
Display shows Incorrect calibration
"Er d" value
T100 & TC120
Operating Manual
Action required
Check the set temperature is correct and that the
over-temperature cut-out temperature is set at least
5°C above the set temperature. Refer to section
5.3.1 for setting instructions.
If the over-temperature cut-out temperature is
correctly set but the unit still shows a "Cut" alarm
then the unit has an internal fault and must be
repaired before it is used again.
Check that the bath set temperature is correct (see
section 5.2.3).
Increase the set temperature (see section 5.2.3) or fit
accessory cooling (see section 4.8).
Check that the bath set temperature is correct (see
section 5.2.3).
Check the over-temperature cut-out is set
appropriately (see section 5.3.1).
Check that the liquid level in the bath is adequate
(see section 6.4 for minimum fill levels).
Change to different liquid type (see section 5.3.5).
Check that the liquid level in the bath is adequate
(see section 6.4 for minimum fill levels).
Check that the bath set temperature is correct (see
section 5.2.3).
Check that high temperature alarm is correct (section
5.3.4).
Check that the liquid level in the bath is adequate
(see section 6.4 for minimum fill levels).
The high temperature calibration point is less than
40°C above the low calibration point – choose a
higher temperature (see section 5.2.6).
The low temperature calibration point is less than
40°C below the high calibration point – choose a
lower temperature (see section 5.2.6).
The calibration value is greater than 10°C from the
set point – check thermometer reading and set point
(see section 5.2.6).
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