AK-PC
572
User
Guide RS8KH202 © Danfoss 2019-03
15
SdMT Max. limit
Safety limit for max. SdMT
At 10 K under the set value, the compressor capacity will be reduced, and the entire
condenser capacity will cut in.
If the threshold is exceeded, the entire compressor capacity will cut out.
Min: 60°C
Max: 160°C
Fac: 140°C
PoLT Min. limit
Same settings as for the MT group
PoLT Max. alarm
PoLT Max. delay
Superheat Min. LT
Superheat Max. LT
SdLT Max. limit
Pgc Max.
Safety limit for max. Pgc
If Pgc exceeds the value set here minus 3 K, the entire fan capacity will cut in,
and compressor capacity will be reduced by 1/3 for every 30 seconds.
If Pgc exceeds the threshold value, the entire compressor capacity will immediately cut out,
and an alarm will be generated when the delay time expires
.
Min: -1 bar
Max: 159 bar
Fac: 40 bar
Safety restart time
Delayed start-up following safety cut-out
If a safety cut-out has occurred due to “Sd max. limit”, “Pgc max. limit” or “Po min. limit”,
the compressors must be kept stopped for a defined period of time. The amount of
time can be set here.
Min: 0 min.
Max: 60 min.
Fac: 2 min.
Sensor alarm reset
Reset alarm after sensor error
When a sensor error has occurred, an O.K. signal must be registered within a specified
number of minutes before the controller resets the alarm. The regulation will be resumed
as soon as the sensor signal is O.K.
Min: 1 min.
Max: 30 min.
Fac: 10 min.
Aux. functions
Digital input
DI AUX1
If there are only two compressors in the MT circuit, the DI3 output will be available for AUX1.
The input can then be used for an optional function.
You can choose between the functions "Fan error" or "Alarm"
D/-demand
DI AUX2
If level signals are not desired for oil management, the "DI on the high pressure module" input
will be available.
The input can then be used for an optional function.
You can choose between the functions "Fan error" or "Alarm"
DI-demand
DI AUX3
If an "HR req" signal is not desired for use in heat recovery, the "DI on the receiver module" input
will be available.
The input can then be used for an optional function.
You can choose between the functions "Fan error" or "Alarm"
DI-demand
DI alam delay
Delay time for a DI alarm
Min: 0 min.
Max: 360 min.
Fac: 0 min.
DI alarm text
Here you can choose what text to display in the event of a DI alarm.
The text can be seen in the display and can also be sent to a system unit.
Choose between the following texts:
General Alarm, Low Pressure, High Pressure, High Temperature, Low Temperature, Oil Level, Oil
Temperature, Liquid Level, Leak Detection, Inverter Fault, Dry Cooler, Pump, Motor Protection
Comp, Brine Pressure.
Note
: There is only one alarm available. The signal will be received in one of the three AUX
inputs
Digital output
DO AUX1
If there are three compressors in the MT circuit, the potential relay output DO3 will be used by
MT3.
If there are only two compressors in the MT circuit, the potential relay can be used by one of the
following functions: Liquid injection, DE-SH or hot gas dumping
DO-demand
DO AUX2
Relay output in the high pressure module
You can choose between the following functions:
Liquid injection, DE-SH or hot gas dumping
DO-demand
DO AUX3
Relay output in the receiver module
You can choose between the following functions:
Liquid injection, DE-SH or hot gas dumping
DO-demand
