Appendix 2 Alarm situations
There are three alarm situations. Condition is that the control-loops are activated.
After the delay time per level of default 30 seconds the stage increases up to the third stage
maximum.
Stage 3 is normally on for only 10 seconds on, as the casing switch emulate as switched
for 4 seconds during the status 3, and the computer will be shut down.
Different signal will be released from the loud speaker according to different alarm stages.
In stage 3 there is a continuous tone.
The Alarm buzzer device icon is not for the alarm properties of the other device icons
within a control-loop. This device is set up especially for it self. The alarm buzzer is for the
acoustic alarm function of the control-loop.
Stage 1
is activated, if for example a fan does not deliver a Tacho signal any more, even it is
activated or a temperature sensor is over the default alarm temperature, or rather turned out. Also
an absence of the signal from a flow sensor could trigger the alarm.
The fans/pumps are switched to 100% PWM and default values (e.g. maximum PWM 80%)
are ignored.
Stage 2
deactivates the Mother-board Tacho-signal. With respective configuration of the specific
motherboard protecting functions in BIOS, actions will be taken as given.
Stage 3
, simulates the push button of the power switch of the casing (emergency switch-off) for 4
seconds. The computer will be shut down.
Relay*, flow meter, fans/pumps, and thermo sensors offer alarm function. The properties of alarm-
buzzer,
loops
,
sensors
, and
fans/pumps
control these functions.
The red Heatmaster-LED blinks at the stage 1, from stage 2 this is permanently on. In an alarm
stage, the port will be informed in every second about the alarm stage, and once after the alarm
stops as well (stage 0).
*The relay cannot trigger the alarm, but in case of an alarm it can commence with further actions.
Triggering of an alarm can be configured freely. fans, flow meters, and temperature sensors can be
configured separately and freely.
18
