Grant Instruments LTC2 - Manual (Page 24)

30933 V2 LTC2
Page 23 Operating Manual
www.grantinstruments.com
Display shows
“Er L” Incorrect calibration
value The low temperature calibration point is less
than 40°C below the high calibration point –
choose a lower temperature (see section
5.2.10).
Display shows
“Er d” Incorrect calibration
value The calibration value is greater than 10°C
from the set point – check thermometer
reading and set point (see section 5.2.10).
Display shows
“Open” Faulty temperature
probe Have a competent person check the probe for
an open circuit fault or contact Grant.
Display shows
“Shrt” Faulty temperature
probe Have a competent person check the probe for
a short circuit fault or contact Grant.
Unit showing
erratic
temperatures Calibration values not
set correctly Restore the factory calibration settings (see
section 5.2.11) then re-calibrate if required
(see section 5.2.10).
Display shows
“Hot” Heating water at or
near to boiling without
lid
Heating very large
volumes of liquid with
large thermal losses Add a lid to reduce thermal losses and leave
unit running with the “Hot” warning present. If
the alarm has not cleared within 1 hour
contact Grant.
Add measures to reduce thermal losses and
leave unit running with the “Hot” warning
present. If the alarm has not cleared within 1
hour contact Grant.
Display shows
“Fuse” Faulty fuse(s) Have a competent person check the internal
fuses or contact Grant.
Display shows
“Crct” PCB fault Have a competent person check the product
or contact Grant.
Display shows
“Self” Safety relay fault Have a competent person check the product
or contact Grant.
Stirrer motor not
rotating Stirring propeller or
pump impeller is
obstructed
Faulty motor Clear obstruction.
Have a competent person check the motor or
contact Grant.
Display shows
“Cold” Accidentally entered
manufacturer reset
mode Warning can be cleared by pressing S button,
but note that all settings (including any factory
calibration) will be reset to the default values.
Contact Grant Instruments service
department for assistance if required.
For any other errors or service requests, please contact Grant Instruments service
department.