Danfoss AK2-SC 255, Reference Manual, Page: 125 / 206

124 AK2-SC 255 Reference Manual RS.8D.M1.22
the Alarms Suspended alarm is set to an action other than Disabled, a single alarm
will occur (and if the level is Critical or Normal, it will dial out) to indicate that the
suspension has occurred. The number of minutes for the suspension can be set.
Suspending rack
alarms
One common reason for suspending rack alarms is rack service requiring a partial or
complete equipment shutdown. In such a case, pressures and temperatures could
reach elevated levels, giving rise to many alarms. A technician would suspend alarms
to forestall unneccessary communications to the store by monitoring personnel. An
operator who wants to suspend alarms does not enter configuration screens to do so.
To suspend alarms, it is only necessary to be authorized for refrigeration functions (or
the higher Supervisor level). To suspend rack alarms, select Refrigeration from the
Main Menu, then select the rack being serviced from the refrigeration menu, and then
select Rack Service from the Rack menu. The Rack Service menu looks as at left
below.
When the Suspend Rack C Alarms button is selected, a pop-up window appears as
in the screen at right above. The only changeable field is the Suspend for field, which
can be set to any value from 0 to 9999. A full description of the alarm suspension
function will be found in chapter 5-2, “Using the Service Screens.”
Configuring
Alarm settings
Let’s return to the Configure Rack C Alarms screen (shown at left below) and
configure an actual alarm. Move the cursor down to the level field for the Phase
Loss alarm. It currently reads Disabled. When you select the field, a list box ap-
pears showing all the levels that can be chosen for the alarm, as shown at right below.