I need ScheduledTask executing every day. Hou to do It ? What I have to change ?

PowerShell Help
1 
$A = New-ScheduledTaskAction -execute "powershell" -argument "-nologo -noprofile -noninteractive C:\Server\monitora_disco.ps1"
$hourly = (New-TimeSpan -Minutes 3)
$days = (New-TimeSpan -Days 3)
$T = New-ScheduledTaskTrigger -Once -At (Get-Date).Date -RepetitionInterval $hourly -RepetitionDuration $days
Register-ScheduledTask -TaskName monitora_disco_2 -Trigger $T -Action $A -description "SCRIPT_VERIFICA_SERVIDOR" -User "NT AUTHORITY\SYSTEM" -RunLevel 1
Set-ScheduledTask monitora_disco_2 -Trigger $T
2

Just use -Daily switch of New-ScheduledTaskTrigger cmdlet.

Get-Help New-ScheduledTaskTrigger -ShowWindow