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User Guide | ERC 112 Refrigeration Controller
CoP
Compressor settings
"uPt"
Voltage protection
"no": no voltage protection.
"yES": voltage protection activated based on voltage related settings.
Min. no
Max. yes
Default no
"uLi"
Minimum cut-in voltage/uLi. Minimum cut-out voltage/uLo.
Maximum voltage/uHi
Min. 0 V AC
These three parameters provide voltage protection to the compressor.
Max. 270 V AC
Start by setting "uHi", followed by "uLo" and "uLi".
Default 0 V
"uLi": when the compressor is due to start, the voltage of the power
"uLo"
supply will be checked and the compressor will only be allowed to
Min. 0 V AC
start if it is at least the value given in this parameter.
Max. 270 V AC
"uLo": when the compressor is running, it will be switched
Default 0 V
OFF if the voltage goes below that given in this
"uHi"
parameter.
"uHi": when the compressor is running, it will be switched
Min. 0 V AC
OFF if the voltage exceeds that given in this parameter.
Max. 270 V AC
Default 270 V
If the compressor is already stopped, it will remain
switched OFF.
"EHd"
Sensor Error Type
"no": no sensor error handling.
Default no
"SEt": in case of control sensor error, follow error run/stop time.
"Ert"
Error Run Time
The parameter only become active in the unlikely event of a broken
Min. 0 min
temperature sensor. It is used to run the application in safety mode.
Max. 60 min
At the same time the sensor error will be shown in the display.
Default 0 min
"Ert" define the duration the compressor will run.
Example: "Ert=4" [min] and "ESt=16" [min] will provide an average cooling
system activity of 20%. Ert and "ESt" values are based on OEM experience
and are by default inactive.
"ESt"
Error Stop Time
The parameter only become active in the unlikely event of a broken
Min. 0 min
temperature sensor. It is used to run the application in safety mode.
Max. 60 min
At the same time the sensor error will be shown in the display.
Default 1 min
"ESt" define the duration the compressor will be "idle".
"CSt"
Minimum Stop Time
It determines the minimum number of minutes the compressor must
Min. 0 min
remain idle before a Temperature cut-in can take effect. For example,
Max. 30 min
Default 2 min
if the temperature sensor indicates that the cut-in temperature has been
reached, but the number of minutes set in this parameter have not elapsed
since the compressor last stopped, then the compressor will stay OFF.
It will only start once the duration given by "CSt" has been reached
provided the temperature is still high enough. "CSt" thus overrides the cut-in.
"Crt"
Minimum Run Time
It determines the minimum number of minutes the compressor must run
Min. 0 min
before a Temperature cut-out can take effect. For example, if the
Max. 30 min
Default 0 min
temperature sensor indicated that the cut-out temperature has been
reached, but the number of minutes set in this parameter have not
elapsed since the compressor last started, then the compressor will
continue. It will only stop once the duration given by "Crt" has been
reached – provided the temperature is still low enough.
"Crt" thus overrides the cut-out.
"Cot"
Maximum OFF Time
This is the maximum time in minutes the compressor is allowed to
Min. 0 min
"idle" – up to 480 minutes. Cot is set to zero by default (inactive).
Max. 480 min
Default 0 min
If the controller is used on a draft beer (ice bank) application, this
parameter can be used to control the ice thickness.
14 | BC200686422115en-000802
© Danfoss | DCS (vt) | 2019.07
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