Danfoss AK-CC 460 User Manual page 12

User Guide | Controller for SemiPlugin appliance, AK-CC 460
Time delay on S6 (product sensor) for pull-down (long alarm delay)
This time delay is used for start-up, during defrosting, immediately after a defrost and after
an appliance clean.
A change is carried out to standard time delay (A26) when the temperature has reached
below the set upper alarm limit.
The time delay is set in minutes.
Hot brine alarm
If the S7 brine temperature gets higher than the set value, an alarm will be delivered. If two
compressors are in use, compressor 2 will be stopped for as long as the temperature is too
high.
Brine alarm differential
The alarm is cleared, and operation of compressor 2 allowed again when the S7
temperature is lower than "A76" minus the differential.
Compressor
The compressor relay works in conjunction with the thermostat. When the thermostat calls
for refrigeration the compressor relay (relays) will be operated.
In Application mode 2 it is only the "Compressor 2" relay that is used as start signal. The
capacity is controlled via the 0 - 10 V output.
Running times
To prevent irregular operation, values can be set for the time the compressor is to run once
it has been started. And for how long it at least has to be stopped.
The running times are not observed when defrosts start.
Min. ON-time (in minutes)
Min. OFF-time (in minutes)
Time delay for couplings of two compressors
Settings indicate the time that has to elapse from the first relay cuts in and until the next
relay has to cut in.
VSD min Speed
Minimum allowed compressor speed
VSD start speed
The requested start speed for the compressor (must be set to a higher value than "VSD min
speed"). After start this speed is maintained for 10 seconds before variation is possible
VSD max speed
The maximum allowed compressor speed
Kp factor
For the PI control of the variable speed compressor
Tn factor
For the PI control of the variable speed compressor
Compressor on-time at sensor error
Output "Compressor 1" only. ("Compressor 2" is off.)
Compressor off-time at sensor error
Output "Compressor 1"
VSD speed at sensor error
The fixed speed at which the compressor will run during error on the control sensor
Slope rate
Limitation on how fast the compressor speed can change is set in Hz / second
Kp max factor
Max value for Kp at great deviation from the temperature setpoint for the PI control of the
variable speed compressor
The LED on the controller's front will show whether refrigeration is in progress
12 | BC230086440483en-000201
A52 PullD del.S6
A76 MaxS7BrineT.
A77 S7Brine Diff
Reset alarm
Ctrl. Error (EKC error)
Compressor control
c01 Min. On time
c02 Min. Off time
c05 Step delay
c46 CompMinSpeed
c47 CompStrSpeed
c48 CompMaxSpeed
c82 Comp Kp
c83 Comp Tn sec
c86 CmpOn T Err
c87 CmpOff Err
c93 CmpEmrgSpeed
c96 MaxSlopeRate
n95 Cmp Kp Max
Comp Relay / Comp2 Relay
Here you can read the status of the
compressor relay.
© Danfoss | DCS (vt) | 2019.12