Grant Instruments TXF200 Operating Manual - Manual (Page 41)

TX150 & TXF200 30424 V6
Operating Manual Page 40
www.grantinstruments.com
EN
Symptom Possible cause Action required
Select a preset
number but icon
changes to “–“
Preset not setup
The preset set
temperature is not
valid for the selected
liquid Select Presets in the Settings menu and configure a
preset (see section 5.3.1).
Select Liquid in the Settings menu and select a
liquid which will operate at every target temperature
(see section 5.3.4).
Select a program
number but icon
changes to “–“
Program not setup
One or more program
segments contain a
target temperature
which is not valid for
the selected liquid Select Programs in the Settings menu and configure
a program (see section 5.3.2).
Select Liquid in the Settings menu and select a
liquid which will operate at every target temperature
(see section 5.3.4).
Stirrer motor not
rotating Unit is in Standby
Mode
Stirring propeller or
pump impeller is
obstructed
Faulty motor Highlight the Standby Icon on the control screen
and press S button to return to normal operation.
Clear obstruction.
Have a competent person check the motor or
contact Grant.
Display shows
“Over
temperature
Alarm
”.
Over-temperature
cut-out has operated Check the set temperature is correct and that the
over-temperature cut-out temperature is set at least
5°C above the set temperature (see section 5.2.6
for setting instructions).
If the over-temperature cut-out temperature is
correctly set but the unit still shows a “Cut-Out”
alarm then the unit has an internal fault and must be
repaired before it is used again.
Display shows
“Low liquid
Alarm
”
Liquid level has
dropped below
minimum level Check that the liquid level in the bath is adequate
(see section 6.4 for minimum fill levels).
Display shows
“Set a valid
temperature
”
Liquid selection has
been changed and
the previous set
temperature is not
valid for the new
liquid Highlight the set temperature icon (which will be
showing -.-) and set the required temperature.
Display shows
“Internal/External
Temp Diff Too
Big” There is a
temperature
difference of more
than 10 degrees
between the internal
and external probe Check the external probe is properly connected at
the rear panel.
Check the external probe is correctly positioned in
the bath liquid and circulation is not restricted.
If the external probe is not required, select the
internal probe using the Settings menu.