Danfoss EKC 202D Manual page 8

Value of reference displacement
The thermostat reference and the alarm values are shifted the following number of
degrees when the displacement is activated. Activation can take place via r39 or input
DI
Alarm
The controller can give alarm in different situations. When there is an alarm all the
light-emitting diodes (LED) will flash on the controller front panel, and the alarm relay
will cut in.
Alarm delay (short alarm delay)
If one of the two limit values is exceeded, a timer function will commence. The alarm
will not become active until the set time delay has been passed. The time delay is set
in minutes.
Time delay for door alarm
The time delay is set in minutes.
The function is defined in o02 or in o37.
Time delay for cooling (long alarm delay)
This time delay is used during start-up, during defrost, immediately after a defrost.
There will be change-over to the normal time delay (A03) when the temperature has
dropped below the set upper alarm limit.
The time delay is set in minutes.
Upper alarm limit
Here you set when the alarm for high temperature is to start. The limit value is set in
°C (absolute value). The limit value will be raised during night operation. The value is
the same as the one set for night setback, but will only be raised if the value is posi-
tive.
The limit value will also be raised in connection with reference displacement r39.
Lower alarm limit
Here you set when the alarm for low temperature is to start. The limit value is set in °C
(absolute value).
The limit value will also be raised in connection with reference displacement r39.
Delay of a DI1 alarm
A cut-out/cut-in input will result in alarm when the time delay has been passed. The
function is defined in o02.
Delay of a DI2 alarm
A cut-out/cut-in input will result in alarm when the time delay has been passed. The
function is defined in o37
Signal to the alarm thermostat
Here you have to define the ratio between the sensors which the alarm thermostat
has to use. S3, S4 or a combination of the two.
With setting 0% only S3 is used. With 100% only S4 is used
Compressor
The compressor relay works in conjunction with the thermostat. When the thermo-
stat calls for refrigeration will the compressor relay be operated.
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)
Reversed relay function for D01
0: Normal function where the relay cuts in when refrigeration is demanded
1: Reversed function where the relay cuts out when refrigeration is demanded (this
wiring produces the result that there will be refrigeration if the supply voltage to the
controller fails).
The LED on the controller's front will show whether refrigeration is in progress.
8 Manual RS8EE202 © Danfoss 08-2010
r40 Th. offset K
Night setbck
(start of night signal)
Forced cool.
(start of forced cooling)
Alarm settings
With data communication the impor-
tance of the individual alarms can be
defined. Setting is carried out in the
"Alarm destinations" menu.
A03 Alarm delay
A04 DoorOpen del
A12 Pulldown del
A13 HighLim Air
A14 LowLim Air
A27 AI.Delay DI1
A28 AI.Delay DI2
A36 Alarm S4%
Reset alarm
EKC error
Compressor control
c01 Min. On time
c02 Min. Off time
c30 Cmp relay NC
Comp Relay
Here you can read the status of the
compressor relay, or you can force-
control the relay in the "Manual
control" mode
EKC 202D