Lauda PROLINE P 5 C, Operating Instructions Manual

Page: 81 / 120

02/2022 Proline heating thermostat 81 / 123
 Quit the change mode by pressing again or automatically after 5 seconds,
while you keep
pressed.
 This somewhat complicated procedure is intended to prevent unintentional
adjustment.


Set the overtemperature switch-off point Tmax below the flash point of the heat transfer liquid
(

6.4).

The setting range is restricted to 5 °C above the upper limit of the working temperature range (Tih

7.8.3).



If the bath temperature rises above the overtemperature cut-off:
1. Alarm sounds as dual-tone signal.
2.
tEMNP
for overtemperature appears in the display.
3. Red LED above the fault triangle flashes.

Heater switches off on both poles,

Pump is switched off electronically.

Rectify cause of fault.
 Wait until the bath temperature has cooled below the cut-off point or set the
cut-off point higher than the bath temperature. When
tEMNP
is shown
in the display:
 Unlock with the key.

Unlocking is not possible on the Command remote control!

 Before longer periods of unsupervised operation, the overtemperature protection should be checked.
To do this:

Slowly lower T
max
, as described above.

Cut-off at the bath temperature should occur.
 Step 1 – 2 (see above) must follow.

Set the overtemperature cut-off higher than the bath temperature again and wait
until
tEMNP
appears in the display.
 Unlock with the key.
 Unlocking is not possible on the Command remote control!
Command
Overtemperature alarm!
 Overtemperature alarm! is shown in the display and signifies that unlocking is only
possible on the Master control panel.
Overtemperature alarm
tEMNP
°C