Lauda IN 130 T Operation Manual page 152

Table 44: High-temperature thermostat
Fault
Alarm Cool Flow in the display
Cooling water temperature is higher than 80°C and for
n
longer than 8 seconds.
Cooling water temperature is higher than 85 °C.
n
Warning HT valve too hot in the display
Temperature on high-temperature valve is higher than
n
120 °C and for longer than 8 seconds.
Temperature on high-temperature valve is higher than
n
140 °C.
Consequence: Irreversible damage to the high-temperature
valve
Possible cause
Pressure fluctuations of the cooling water
n
Accidental disconnection of the cooling water by third
n
parties
Blockage of high-temperature valve
n
Breakage of the piping on the device side for the
n
cooling water
Device switches to degas mode Ä Chapter 5.6 "Degas heat
transfer liquid (low boiling point expulsion)" on page 75.
Possible cause:
Cooling water enters the hydraulic circuit through a
n
defective heat exchanger.
However, it is to be noted: If necessary, the device carries
out "automatic degassing". This automatic process is no
fault.
152 / 198 Integral Process Thermostats and High-Temperature Thermostats
Possible remedy
Turn water connection on full ð Restore a correct
n
cooling water supply.
In the event of a blockage of the high-temperature
n
valve, inform the LAUDA Service Ä Chapter 14.4
"Contact LAUDA" on page 160.
Notify the LAUDA Service Ä Chapter 14.4 "Contact
n
LAUDA" on page 160 department.
Ensure the suitable cooling water quality Ä Chapter
n
4.5 "Cooling water requirements" on page 42. Other-
wise there is a risk of corrosion!
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