Datasheet

5.1 Temperature Controller Unit (TCU)
5.1.3. TCU interlock
The built-in TCU interlock is activated when a fault occurs on the TCU controller, e.g.
prompt temperature rise. The interlock is by default an NC (Normally Close) relay
contact, and may be reset by pressing the reset button (3) shown in figure 5.2.
Note: it is also possible to set the Interlock as a NO (Normally Open) contact.
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Figure 5.2.: TCU interlock.
Recovery procedure
This procedure must be followed in order to recover the temperature controller from
an interlock event.
1. Turn off the QCL following procedure 5.3.2.
2. Identify the fault which activated the interlock and fix it.
3. Wait until the temperature is lower than the maximum allowed.
4. Press the RESET button (3) on the TCU rear panel (see figure 5.2).
The interlock is reset and the red LED alarm (2) should be off.
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2012 SA 59