Setting and UnsettingPage 21Starting a Hold Up Alarm (HUA)A two-way remote control can be used to start a Hold Up Alarm if enabledby an installer and by a master or admin user (see page 61).Note: Enabling this feature means that the system no longer complies withBS8243 or DD243.To start a HUA from a two-way remote control:1. Press and hold any two diagonally opposite buttons at the same time.All four LEDs flash red three times.2. The control unit starts a hold up alarm and, if applicable, sends thealarms to the Alarms Receiving Centre (ARC).3. All four LEDs glow green for three seconds. This is your confirmationthat the control unit has generated the alarm.Using a one-way remote controlThe one-way remote control has four buttons and a small LED that glowswhen it transmits a signal (see Figure 6). The buttons can be programmedas required (see page 57), but by default, three of the buttons are used toset or unset the system.Note that to prevent accidental operation the user must hold a button downfor at least two seconds to ensure a transmission.1. Full Set.2. Part Set.3. (Programmable, see page 57.)4. Unset.5. Transmit LED.Figure 6. Default one-way remote control buttonsEach remote control has a unique electronic identity. You can assign (seepage 37) only one remote control to each user.AB