Thermo Technologies SMT 100 User Manual

Page 14

3.4.2 MANUAL PUMP OVERRIDE

The Pump can be manually switched ON at any time by pressing both the

keys together. On release of the

keys, the pump will switch to its

previous state. Note that the unit must be in DISPLAY mode for this function
to work.

3.4.3 KEYPAD LOCK

It is possible to lock the keypad so that the set values may not be accidentally

changed. To lock the keypad, press and hold the

key for eight seconds.

The bleeper will then sound and the “Display Select Indicator” will stop
flashing, showing that the present settings are fixed and protected, and a full

stop will appear in the display. To unlock the keypad, press the

key for

eight seconds and the “Display select Indicator” will start flashing. Note that
the keypad lock must be engaged in order to view the Collector, Tank and
Actual temperatures.

3.4.4 SENSOR FAULT

In the case of a Tank sensor fault, the auxiliary relay will switch OFF; i.e. C
connected to 2. In the case of a Collector sensor fault the pump relay will
divert to manually on. In the case of a Return sensor fault the pump relay will
divert to manually on.