If the high temperature alarm value is exceeded then TC120 will sound the buzzer
intermittently and show “-Al-” on the display. The alarm can be acknowledged by
pressing either the F or S buttons. However, the alarm is persistent and will trigger again
if the temperature still exceeds the high temperature value. The alarm can be cancelled
by following the steps above but using the dial to select “Off” in step 3 and pressing the S
button to confirm.
Note: the high temperature alarm will not switch off the heater.