Lauda Hydro H 16, Operating Instructions Manual

Page: 22 / 34

22 / 34 Hydro Water Baths 09/2020
Over-temperature alarm 10.4
Code003
If the actual temperature falls below the alarm set point, the current process is aborted. The display of the temperature
controller shows error code 003. Check the set trigger point of the alarm (see chapter 8.2.2) and set it to > +4.0 K. Re-
start and observe the process in order to determine a possibly visible cause for the drop of the actual temperature,
for example
·
heavy under- or overshooting of the temperature in the tank during the regulation process.
·
Please also observe the thermal energy symbol (see chapter 8.3) that indicates the energy supply to the heating
element. If the actual temperature is above the set point, it is blanked.
·
inserting samples into the water that are too warm
·
possible defect of controller A1 or the Triac V1 (see chapter 13)
·
set point temperature too low in relation to the ambient temperature (see chapter 12)
Temperature sensor is interrupted 10.5
Code004
Temperature sensor B1 (see chapter 13) of the controller is constantly checked for interruptions. In case of a defect the
current process is aborted. The display of the temperature controller shows error code 004.
The temperature sensor can be checked by a resistance reading after pulling off contacts X6 and X7 of the temperature
controller A1 (see circuit diagram, chapter 13).
Typical resistance measurements of a non-defective temperature sensor are
·
at 20 °C ambient temperature between 1901 and 1944 Ohm
·
at 25 °C ambient temperature between 1980 and 2020 Ohm
Furthermore, this error code might also indicate a defective controller A1.
Temperature sensor has short circuit 10.6
Code005
Temperature sensor B1 (see chapter 13) of the controller is constantly checked for short circuits. In case of a defect the
current process is aborted. The display of the temperature controller shows error code 005.
The temperature sensor can be checked by a resistance reading after pulling off contacts X6 and X7 of the temperature
controller A1 (see circuit diagram, chapter 13).
Typical resistance measurements of a non-defective temperature sensor are
·
at 20 °C ambient temperature between 1901 and 1944 Ohm
·
at 25 °C ambient temperature between 1980 and 2020 Ohm
Furthermore, this error code might also indicate a defective controller A1.