Alarm and beeping sound

hi i just have multipla jtd 115
but i encounter a problem with my alarm. the siren goes-off every mid night and the wired thing is it happen only one time every night. i have resorted to turn off the alarm but the alarm still goes-off ( light blinking) the light indicator suggested there somthing wrong with the boot lid ( 6x blink.

do any one have manual how to operate the alarm such as manual dignostic, what is that beeping means etc..