AKC ON (Evap shutdown when injection o)
One of the main features of the AKC On function is that the SM
will detect if there is a pack shutdown condition. The SM does
this by monitoring the pack controller for such conditions. If
congured to do so, and upon detecting a pack shut down, the
SM will issue a signal to all (congured) evap controllers under the
pack suction group to close their AKV valves. The eect of closing
the local AKV valve is to limit liquid ow in the evaporator. Due
to the AKV valve being closed during a pack shutdown period
there is a greatly reduced risk of liquid hammer or compressor
damage upon pack / compressor start up. The AKC ON function
must be congured for each pack suction group. By default, the
associated evap controllers are set to ‘yes’ under the selection
choice of Evap shutdown when injection o. If a evap controller is
not required to be part of the suction group AKC ON function, set
this value to ‘No’.
Pack Conguration
Under the settings / Summary screen set the question
Evap shutdown when injection o to ‘YES’
Evap Conguration
If the Evap is not required to be part of the AKC ON function, modify
the question
Evap shutdown when injection o to ‘No’
AK-SM 850 User Guide Lit. no. USCO.PI.R1.E1.02 © Danfoss 07-2013 43
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