13
Troubleshooting
This section contains information on troubleshooting and CE Comments. This
information pertains to a number of bath models and certain specifics may not
pertain to your model.
13.1
Troubleshooting
In the event that the instrument appears to function abnormally, this section
may help to find and solve the problem. Several possible problem conditions
are described along with likely causes and solutions. If a problem arises, please
read this section carefully and attempt to understand and solve the problem. If
the probe seems faulty or the problem cannot otherwise be solved, contact an
Authorized Service Center (see Section 1.3) for assistance. Be sure to have the
model number and serial number of your instrument available.
Problem
Causes and Solutions
The heater indicator LED stays
red but the temperature does not
increase
The display does not show “cutout” nor displays an incorrect bath tem-
perature, but the controller otherwise appears to operate normally.
The problem may be either insufficient heating or no heating at all or
too much cooling. The heater power setting being too low, especially
at higher operating temperatures, may cause insufficient heating.
Switching to the higher heater power switch setting, if available, may
solve the problem. Try reducing cooling capacity by increasing the
cooling temperature, switching the cooling power switch to “LOW”, or
switching off the cooling altogether.
One or more burned out heaters or blown heater fuses may also
cause this problem. If the heaters seem to be burned out, contact an
Authorized Service Center (see Section 1.3) for assistance.
The controller display flashes
“
cutout
” and the heater does
not operate
The display flashes “
cutout
” alternately with the process tempera-
ture. If the process temperature displayed seems grossly in error, con-
sult the following problem:
‘The display flashes “cutout” and an
incorrect process temperature’.
Normally, the cutout disconnects power to the heater when the bath
temperature exceeds the cutout set-point causing the temperature to
drop back down to a safe value. If the cutout mode is set to “AUTO”,
the heater switches back on when the temperature drops. If the mode
is set to “RESET”, the heater only comes on again when the tempera-
ture is reduced and the cutout is manually reset by the operator, see
Section 9.10, Cutout. Check that the cutout set-point is adjusted to 10
or 20°C above the maximum bath operating temperature and that the
cutout mode is set as desired.
If the cutout activates when the bath temperature is well below the
cutout set-point or the cutout does not reset when the bath tempera-
ture drops and it is manually reset, then the cutout circuitry or the cut-
out thermocouple sensor may be faulty or disconnected. Contact an
Authorized Service Center (see Section 1.3) for assistance.
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13 Troubleshooting
Troubleshooting
