Danfoss AK-PC 551 User Manual page 20

Connections when using Setup Wizard
If you have used the Setup Wizard for the configuration, the controller will automatically assign the selected functions
to inputs and outputs in accordance with the following prioritised order:
Digital outputs (DO1-DO8):
• Pulse output for control of the
capacity valves for digital scroll,
stream or Bitzer CRII will be
located on solid state outputs
DO5 and DO6
• Compressor start and unload-
ers for suction groups A and B,
respectively
• Fans
• Injection ON
• Alarm
The assignment of functions on the respective inputs and outputs can be regulated
in "IO configuration". Here is an example of 3 compressors and 3 fans:
20
Digital inputs (DI1-DI8):
• Compressor safety inputs for suc-
tion groups A and B, respectively
• Fan safety input
• External main switch (start/stop)
• HP safety switch
• LP safety switch for suction
groups A and B, respectively
• Night status
• Heat recovery
• Load sheeding
• General alarm inputs DI1-DI3
In this image you can see how
many outputs and inputs your
settings have provided.
User Guide RS8GY302 © Danfoss 2015-06
Analogue outputs (AO3-AO4)
• Compressor speed control for
suction groups A and B, respec-
tively
• Condenser speed control
Analogue inputs (AI1-AI8)
• PoA and PoB suction pressure is
located on AI1 and AI2, respec-
tively
• Pc condensation pressure is
located on AI3
• Sc3 outside temperature is
located on AI4
S4A and S4B media temperature
• S7 media temperature, condenser
• Sd comp. 1 discharge gas tem-
perature for digital scroll/stream
compressor for suction groups A
and B, respectively
• Ss suction gas temperature for
section groups A and B, respec-
tively
• Sd discharge gas temperature
for suction groups A and B,
respectively
• Saux for general thermostat
AK-PC 551