GB160The control panel supervises and identifies the receiver. Itmonitors the state of:• the power supply,• the radio link,• the anti-tamper contact.If a fault has been memorised, the control panel issues a voicemessage to indicate the fault following a system command.The power fault is also indicated locally by the receiver as itissues 3 short beeps.Example: if the receiver/control panel radio link is lost, thecontrol panel issuesthe voice message:8. Maintenance8.1 Fault indicationsTo change the battery:8.2 Changing the battery“beep, partially arm one,beep, fault, radio link, device X”1. Switch the system to installation mode using the controlpanel to enter:thenmaster codeinstaller code2. Loosen the 4 cover screws and open the receiver.“beep, test mode”“beep, installationmode”“beep, test mode”“beep, installationmode”