Parameters; Menu Functions; Configuration; Thermostat - Danfoss ERC 21 Series User Manual

Electronic refrigeration control, type ERC 21X

Parameters

Menu functions

Configuration

Table 7: Configuration
Code Parameter description
cFg Configuration
r12 Main Switch
With this setting refrigeration can be started, stopped or a manual override of the outputs can be allowed.
Service (manual control of outputs allowed)(-1 in Controller Display)
OFF (0 in Controller Display)
ON (1 in Controller Display)
o61 Predefined applications
Predefined applications is to give the user an easy and fast way to configure the controller. Users can set appropriate applica-
tion that meets their requirements under this menu (please refer predefined applications table under section 2.4 for more
details). Predefined application is protected by main switch.
o07 Select main application type for which controller is used
rE= Cooling
Ht= Heating
o06 Sensor type
This parameter defines the type of temperature sensors connected to the controller. Below sensor types can be used in
ERC21x
n5=NTC 5K (5000 Ohm at 25 °C, Beta value=3980 @25/100 °C)
n10= NTC 10 (10000 Ohm at 25 °C, Beta value = 3435 @ 25/100 °C)
pt1= PT1000
ptc= PTC
All the mounted sensors (Sair, S5 and Sc)must be of same type.
o71 This parameter defines the desired configuration for Relay 2 (DO2)
dEF=Defrost
ALA=alarm
Lig=Light
o36 This parameter defines the desired configuration for Relay 4 (DO4). Applicable only for ERC214.
Lig=Light
ALA=alarm

Thermostat

Table 8: Thermostat
Code Parameter description
r-- Thermostat
r00 SetPoint
This parameter defines the desired cabinet temperature at which compressor cuts out. The set point can be locked to a range
within r02 and r03 settings.
r01 Differential
This defines the difference between the cut-out and the cut-in of compressor relay. Compressor relay will cut-in when the
cabinet temperature reaches the set point+ differetial. In case of heating application, heater will cut-in when the temperature
reaches the set point-differential.
r02 Maximum Set Point limitation
The maximum allowable setpoint value can be configured here that would avoid setting too high values by mistake.
r03 Minimum Set Point limitation
The minimum allowable setpoint value can be configured here that would avoid setting too low values by accident/mistake.
r04 Display offset
Correction value in display temperature. If the temperature of the products / cabinet and the temperature received by the
controller are not identical, an offset adjustment of the display temperature can be carried out using this parameter.
r05 Display Unit
Set here if the controller is to show temperature values in °C or in °F. Switching from one to the other will cause all tempera-
ture settings to be automatically updated to respective unit.
r09 Calibration of Sair
This parameter is a relative value and allows adjustment of the Sair sensor temperature. For instance, at a measured tempera-
ture of 7 °C and r09 set to 2K, the input from the Sair sensor will be 9 °C instead.
r12 Main Switch
With this setting refrigeration can be started, stopped or a manual override of the outputs can be allowed. Stopped refrigera-
tion will give a "OFF" signal on the display.
-1=service (manual control of outputs allowed)
0=OFF
1=ON
r13 Night setback value
The thermostat's reference can be offset by this value during night or when there is no usage. Offset can be set both possitive
and negative sides (Select a negative value if there is to be cold accumulation). Activation can take place via digital input.
© Danfoss | Climate Solutions | 2023.01
Min. Max.
Service ON
AP0 AP7
rE Ht
n10 pt1
dEF Lig
Lig ALA
Min. Max.
-100.0 200.0
0.1 20.0
-100.0 200.0
-100.0 200.0
-10.0 10.0
-C -F
-20.0 20.0
-1 1
-50.0 50.0
BC194286421698en-000901 | 18
Unit
Unit
°C
K
°C
°C
K
K
K