Danfoss AK-CC 750A User Manual page 6

Light-emitting diodes
A number of light-emitting diodes makes it possible to follow the
signals that are received and transmitted by the controller.
Log
From the log function you can define the measurements
you wish to be shown.
The collected values can be printed, or you may export them to a
file. You can open the file in Excel or import in AKM.
(The Log function is only available via AK-ST 500.)
If you are in a service situation you can show measurements in a
trend function. The measurements are then made real-time and
displayed instantly.
Alarm
The display gives you an overview of all active alarms. If you wish
to confirm that you have seen the alarm you can cross it off in the
acknowledge field.
If you want to know more about a current alarm you can click on it
and obtain an information display on the screen.
A corresponding display exists for all earlier alarms. Here you can
upload information if you need further details about the alarm
history.
Adaptive defrost
AK-CC 750A is equipped with an adaptive defrost function. By
using an AKV valve (ETS/CCMT Valve) as mass flow sensor for the
supply of refrigerant the control can monitor ice formation on the
evaporator.
Function can cancel planned defrosts which are not necessary,
and on its own initiative start a defrost if the evaporator is about
to be blocked by rime and ice.
6 RS8HP102 © Danfoss 2018-09
Slow flash = OK
■ Power
Quick flash = answer from gateway/
■ Comm
■ DO1 ■ Status
Constantly ON = error
■ DO2 ■ Service Tool
Constantly OFF = error
■ DO3 ■ LON
■ DO4 ■ I/O Extension
■ DO5 ■ Alarm
Flash = active alarm/not acknowledged
■ DO6
Constant ON = Active alarm/acknowl-
■ DO7 ■ Display
edged
■ DO8 ■ Service Pin
(ETS)
installed in network
AK-CC 750A