Danfoss ERC 21X User guide

User manual | ERC 21X temperature controllers series

ERC 21X, smart multipurpose
refrigeration controller

4

push buttons, a
big display and
an intuitive menu
structure ensure
superior ease of use.

www.danfoss.com/erc

Table of contents

1| Introduction 4

1.1| Application 4

1.2| General Description 4

1.3| ERC 21X Series 5

1.3.1| ERC 211 5

1.3.2| ERC 213 5

1.3.3| ERC 214 5

2| Key features 6

2.1| Voltage protection 6

2.2| Compressor protection 6

2.3| Compressor protection against high condensing temperature 6

2.4| Pre-defined applications 7

2.5| Fan pulsating during compressor OFF cycle 9

2.6| Defrost on Demand 10

3| Technical Specification 11

4| Installations 12

4.1| Dimensions (mm) 12

4.2| Mounting 12

4.3| Installation steps 12

4.4| Electrical connection diagram 13

4.4.1| ERC 211 - connection diagram 13

4.4.2| ERC 213 - connection diagram 13

4.4.3| ERC 214 - connection diagram 13

4.5| Power supply 14

4.6| Sensors 14

4.7| Electric noise 14

5| Menu Navigation and overview 14

5.1| Key functions and display Icons 14

5.2| Quick Configuration at power up 14

5.3| Menu Structure 15

5.4| Quick Configuration via “cFg” menu 16

5.5| Adjust set point temperature 16

5.6| Initiate a manual defrost 16

5.7| Initiate a pull down 16

5.8| View active alarm 16

5.9| Unlock keyboard 16

6| Menu functions 17

7| Parameter table 23

7.1| Parameter table - ERC 211 23

7.2| Parameter table - ERC 213 26

7.3| Parameter table - ERC 214 30

7.4| Alarm Code 34

7.5| Troubleshooting 34

8| Ordering 34

8.1| Sensors 35

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1| Introduction

1.1| Application

ERC 21X is a smart multipurpose refrigeration controller
designed to fulfill today’s requirement of commercial
refrigeration applications. This controller is suitable for high,
medium and low temperature applications with natural,
electrical and hot gas defrost compatibilities.
Typical applications include Glass door merchandisers,
commercial fridges and freezers, cold rooms and various
other commercial refrigeration applications.

1.2| General Description

ERC21X controller comes with four push buttons, a big
display, easy and intuitive menu structure and pre-defined
applications ensure ease of use. Controller is loaded
with energy efficiency features like smart evaporator fan
management, day/night mode and defrosts on demand
features.
High Effect 16 A relay enable direct connection of heavy
loads without use of intermediate relay: up to 2 hp
compressors depending on its power factor and motor
efficiency (greater than 0.65 for 230 V and greater than

0.85 for 115 V).
Safe operation of the unit is ensured through voltage
protection and high condensation temperature protection
features.

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1.3| ERC 21X Series

Three version of ERC 21X is available in both 230 V / 50/60 Hz and 115 V / 60 Hz.

– ERC 211: single relay output for refrigeration and heating applications.
– ERC 213: three relays outputs for ventilated refrigeration applications.
– ERC 214: four relays outputs for ventilated refrigeration applications.

1.3.1| ERC 211

ERC 211 has one relay output and two inputs
(1 analogue, 1 analogue/digital).
This controller can be used for either cooling or heating
applications.
Outputs:

– Relay 1: compressor/solenoid valve control or simple

heater in case of heating application Inputs.

Inputs:

– Input1: cabinet/control sensor (Sair).
– Input 2: condenser sensor or digital inputs which can

be configured for various functions as mentioned under
menu code o02.

Sair

DO1

Sc

1.3.2| ERC 213

ERC 213 has three relays outputs and four inputs
(2 analogues, 1 analogue/digital, 1 digital) for cooling
applications.
Outputs:

– Relay 1: compressor/solenoid valve control.
– Relay 2: can be configured either defrost or external alarm.
– Relay 3: fan control.

Inputs:

– Input 1: cabinet/control sensor (Sair).
– Input 2: defrost sensor (S5).
– Input 3 : condenser sensor (Sc) or digital input which can

be configured to various functions as mentioned under
menu code “o02”.

– Input 4: digital input which can be configured to various

functions as mentioned under menu code “o37”

1.3.3| ERC 214

ERC 214 has four relays outputs and four inputs (2 analogue,
1 analogue/digital, 1 digital) for cooling applications.
Outputs:

– Relay 1: compressor/solenoid valve control.
– Relay 2: defrost control.
– Relay 3: fan control.
– Relay 4 : this can be configured for either light or external

alarm.

Inputs:

– Input 1: cabinet/control sensor (Sair).
– Input 2: defrost sensor (S5).
– Input 3 : condenser sensor (Sc) or digital input which can

be configured to various functions as metioned under
menu code “o02”.

– Input4: digital input which can be configured for various

functions as mentioned under menu code “o37”.

S5

S5

Sair

Sair

DO2

DO3

DO2

DO3

DI1

DI2

DO1

Sc

DI1

DI2

DO4

DO1

Sc

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2| Key features

emperatur

2.1| Voltage protection

Protection against high and low voltage by limiting the
compressor operation within specified voltage limits.
Whenever the supply voltage goes beyond the defined
voltage protection limits controller will shut the compressor
OFF and flashes alarm on the display.
It will restore the operation when the voltage falls under the
operating range respecting minimum stop time.

2.2| Compressor protection

High voltage limit

Low voltage cut-in
limit (compressor start)

Low voltage cut-out
limit (alarm and
compressor stop)

Parameters for Minimum ON and OFF time, protect the
compressor by short cycling/sudden switching ON and OFF
by defining minimum ON and OFF time.

2.3| Compressor protection against
high condensing temperature

If the condenser is blocking up with dirt and thereby reaches
a too high condensing temperature, controller will give
the user early warning through condenser alarm and if
temperature rises further it will switch the compressor OFF.
If the temperature measured by the condenser sensor (Sc)
is reaching the set ”pre alarm limit” a alarm is raised, but no
further action is taken.
This is used to indicate to the user that something is wrong
with the condenser. Often the reason is that that the air flow
to the condenser is restricted (dirt) or because the condenser
fan is broken.
The alarm will reset if the condenser temperature drops back
by 5 °C. If the measured condenser temperature continues
to increase and reaches the set “Block limit” the compressor is
stopped and it is restricted from starting again until the alarm
is reset manually.

min run time

ON

OFF

Power to compressor

e

CUT-IN

CUT-OFF

T

Sc temperature °C

Block limit

Pre alarm limit

Pre alarm OK

Compressor

Pre alarm

Block alarm

min stop time

time

time

Manual reset

Sc temperature °C

T1 T2 T3 T4

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2.4| Pre-defined applications

The purpose of the Predefined applications is to give the user an easy and fast way to configure the controller to a specific
application based on storage temperature (LT, MT, HT), defrost type (none, natural, electrical) and
defrost method (terminated on time or temperature).
When user select specific application based on their requirements, the controller will load a specific set of parameter values
and will hide parameters that are not relevant for the selected application.
Adjustment of the set of parameters value will be still possible at any time.
In addition to pre-defined applications, all controller versions have two standard applications, one with full list of parameters
and another with simplified list of parameters, that allows the user to make their own customized parameter settings
(AP0 and AP5 in case of ERC211 and AP0 and AP6 in case of ERC213 / ERC214).

Pre-defined application table of ERC 211 controller

App Mode Description Temperature Defrost type Defrost end
App 0 Cooling/

Heating

App 1 Cooling Medium temperature without defrost (4 – 20 °C) None None
App 2 Cooling Medium temperature with timed natural defrost (2 – 6 °C) Natural Time
App 3 Cooling Medium temperature with natural defrost stop on

App 4 Heating Heating Thermostat (20 – 60 °C) None None
App 5 Cooling/

Heating

No predefined application

air temperature

No predefined application with simplified list of
parameter

(2 – 6 °C) Natural Air

temperature

Selection 1 covers applications where a standard cooling thermostat is needed and no defrosts are performed.
Selection 2 covers normal temperature applications with natural defrost with stop on time.
Selection 3 covers normal temperature applications with natural defrost with stop on air temperature.
Selection 4 covers applications where a simple heating thermostat is needed (no defrost).
Selection 5 covers applications where a reduced parameter list is recommended.

ERC 211 - APP 4

DO1

230 V AC

ERC 211 - APP 1/2/3

SairDI1

230 V AC

DO1

SairDI1

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Pre-defined application table of ERC 213 controller

App Mode Description Temperature Defrost type Defrost end
App 0 Cooling No predefined application

App 1 Cooling

App 2 Cooling

App 3 Cooling

App 4 Cooling

App 5 Cooling

App 6 Cooling

Medium temperature ventilated refrigeration units
with timed natural defrost

Medium temperature ventilated refrigeration units
with timed electrical defrost

Low temperature ventilated refrigeration units with
timed electrical defrost

Medium temperature ventilated refrigeration units
with electrical defrost (by temperature)

Low temperature ventilated refrigeration units with
electrical defrost (by temperature)

No predefined application with simplified list of
parameters

(2 – 6 °C) Natural Time

(0 – 4 °C) Electrical Time

(-26 – -20 °C) Electrical Time

(0 – 4 °C) Electrical Temperature

(-26 – -20 °C) Electrical Temperature

Selection 1 covers normal temperature applications with natural defrost with stop on time.
Selection 2 and 3 covers respectively medium and low temperature applications with electrical defrost with stop on time.
Selection 4 and 5 covers respectively medium and low temperature applications with electrical defrost with stop on

defrost sensor “S5”.
Selection 6 covers applications where a reduced parameter list is recommended.

230 V AC

ERC 213 - APP 1

DI2

DO1

DO2 DO3

ERC 213 - APP 2-3

SairDI1

230 V AC

DO1

DI2

DO3DO2

SairDI1

230 V AC

ERC 213 - APP 4-5

DI2 S5

DO1

DO3DO2

SairDI1

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Predefined application table for ERC 214

App Mode Description Temperature Defrost type Defrost end
App 0 Cooling No predefined application

App 1 Cooling

App 2 Cooling

App 3 Cooling

App 4 Cooling

App 5 Cooling

App 6 Cooling

Medium temperature ventilated refrigeration units
with timed natural defrost

Medium temperature ventilated refrigeration units
with timed electrical defrost

Low temperature ventilated refrigeration units with
timed electrical defrost

Medium temperature ventilated refrigeration units
with electrical defrost (by temperature)

Low temperature ventilated refrigeration units with
electrical defrost (by temperature)

No predefined application with simplified list of
parameters

(2 – 6 °C) Natural Time

(0 – 4 °C) Electrical Time

(-26 – -20 °C) Electrical Time

(0 – 4 °C) Electrical Temperature

(-26 – -20 °C) Electrical Temperature

Selection 1 covers normal temperature applications with natural defrost with stop on time.
Selection 2 and 3 covers respectively medium and low temperature applications with electrical defrost with stop on time.
Selection 4 and 5 covers respectively medium and low temperature applications with electrical defrost with stop on

defrost sensor “S5”.
Selection 6 covers applications where a reduced parameter list is recommended.

230 V AC

ERC 214 - APP 1

DI2

DO1

DO3 DO4

SairDI1

230 V AC

ERC 214 - APP 2-3

DI2

DO1

DO3DO2 DO4

ERC 214 - APP 4-5

SairDI1

230 V AC

DO1

DI2 S5

DO3DO2 DO4

SairDI1

2.5| Fan pulsating during compressor OFF cycle

This is an energy saving feature. During compressor OFF cycle controller will run the fan with defined duty cycle to maintain
uniform temperature and delay the need of compressor switching ON

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2.6| Defrost on Demand

This feature records and averages the evaporator temperature recorded during the first three cut out of compressor
immediately after defrost. The controller will constantly follow the evaporator temperature and compare with the above
recorded average temperature. In between two defrosts, If the evaporator temperature goes below the previously recorded
average temperature by “defrost on demand” value “d30”, defrost will be triggered.

– This function can only be used in 1:1 systems.
– This function is disabled when the parameter “defrost on demand” is set to 20.
– Defrost on demand is triggered only if the time since the last defrost session has ended is greater than ¼ of the defrost

interval or 2 hours whichever is lesser.

– Defrost doesn’t start by this method during the following scenarios.

– Pull down mode.
– Night mode.
– Main switch in DI or main switch in Menu is in OFF position.
– Manual control mode.
– Evaporator sensor senses a temperature which is greater than 0 °C.

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3| Technical Specification

FEATURES DESCRIPTION

Purpose of control

Construction of control Incorporated control

Power supply 115 V AC / 230 V AC 50/60 Hz, galvanic isolated low voltage regulated power supply
Rated power Less than 0.7 W

Inputs

Allowed sensor types

Sensors included in Kit Solution NTC 10000 Ohm at 25 °C, cable length: 1.5 m

Accuracy

Type of action 1B (relay)

Output

Display LED display, 3 digits, decimal point and multi-function icons, °C + °F scale
Operating conditions -10 – 55 °C (14 – 131 °F), 90% Rh
Storage conditions -40 – 70 °C (-40 – 158 °F), 90% Rh

Protection

Environmental Pollution degree II, non-condensing

Overvoltage category

Resistance to heat and fire

EMC category Category I

Approvals

Operating temperature sensing control suitable for incorporation into commercial air-conditioning
and refrigeration applications

Sensor inputs, Digital inputs, Programming key
Connected to SELV limited energy <15 W

NTC 5000 Ohm at 25 °C, (Beta value=3980 at 25/100 °C - e.g. EKS 211)
NTC 10000 Ohm at 25 °C, (Beta value=3435 at 25/85 °C - e.g. EKS 221)
PTC 990 Ohm at 25 °C, (e.g. EKS 111)
Pt1000, (e.g. AKS 11, AKS 12, AKS 21)

Measuring range:

-40 – 105 °C (-40 – 221 °F)
Controller accuracy:
±1 K below -35 °C, ±0.5 K between -35 – 25 °C,
±1 K above 25 °C

DO1 Compressor relay:
16 A, 16 (16) A, EN 60730-1
10 FLA / 60 LRA at 230 V, UL60730-1
16 FLA / 72 LRA at 115 V, UL60730-1
DO2 Defrost relay:
8 A, 2 FLA / 12 LRA, UL60730-1
8 A, 2 (2 A), EN60730-1
DO3 Fan relay:
3 A, 2 FLA / 12 LRA, UL60730-1
3 A, 2 (2 A), EN60730-1
DO4 Alarm/Light relay:
2 A

Front : IP65 (Gasket integrated)
Rear: IP00

II - 230 V supply version - (ENEC, UL recognized)
III - 115 V supply version - (UL recognized)
Category D (UL94-V0)
Temperature for ball pressure test statement “According to Annex G”
(EN 60730-1)

UL recognition (US & Canada) (UL 60730-1)
ENEC (EN 60730-1)
CQC
CE (LVD & EMC Directive)
EAC (GHOST)
NSF
ROHS2.0
HACCP temperature monitoring in compliance with EN134785 Class I,
when used with AKS 12 sensor

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4| Installations

4.1| Dimensions (mm)

71

83

4.2| Mounting

36

66

Rear mounting (lock with clips)

28

29

Drilling template61.2

Mounting Dismounting

4.3| Installation steps

– Place the wired controller in the slot and ensure rubber sealing is resting properly on the mounting surface.
– Slide the mounting clips along the rails of the rear plastic from the rear side of the panel.
– Slide the clips towards mounting surface until controller is firmly fixed.
– To remove the controller, one needs to skillfully unlatch the snapping tab and pull the clips backwards.

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4.4| Electrical connection diagram

4.4.1| ERC 211 - connection diagram

DO1

12

3L 4N 567891011121314

Quick programming tool: EKA 183B

GND GND

~~~~

Power supply

(according to the product code number)

4.4.2| ERC 213 - connection diagram

DO1

12

(according to the product code number)

3L 4N 567891011121314

~~~~

Power supply

DO2 DO3

4.4.3| ERC 214 - connection diagram

Sair DI/Sc

Quick programming tool: EKA 183B

GND GND

Sair S5 Sc/DI1 DI2

DO1

12

(according to the product code number)

3L 4N 567891011121314

~~~~

Power supply

Quick programming tool: EKA 183B

DO2 DO3 DO4

GND GND

Sair S5 Sc/DI1 DI2

Connectors:
Max. Torque = 0.4 Nm

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4.5| Power supply

115 V AC / 230 V AC / 50/60 Hz (Refer to the controller label).

4.6| Sensors

– Sair Control sensor.
– S5 Defrost (evaporator) sensor.
– Sc Condenser sensor.
– Di1 Digital input - configurable to the functions listed under menu code o02.
– Di2 Digital input - configurable to the functions listed under menu code o37.

–

4.7| Electric noise

Cables for sensors and DI inputs must be kept separate from other electric cables:

– Use separate cable trays.
– Keep a distance between cables of at least 10 cm.
– Long cables at the DI input should be avoided.

5| Menu Navigation and overview

5.1| Key functions and display Icons

Key Function

Press for one second: UP

Press and hold at power up:
FACTORY RESET (“FAC ” is displayed)

Press for one second: BACK
Press and hold: PULL-DOWN

Display Icons

Press and hold: ON/OFF

Press for one second: DOWN
Press and hold: DEFROST

Press for one second: TEMPERATURE SETPOINT/OK
Press and hold: MENU

Night mode (Energy saving) Fan running

Compressor running (Flashes in pull-down mode) Active alarm

Defrost Unit (°C or °F)

5.2| Quick Configuration at power up

– STEP 1: power on
– STEP 2: select the quick configuration menu

Within 30 seconds of power on, press “<” BACK for 3 seconds. The main switch “r12” is automatically set to OFF.

– STEP 3: select pre-installed application “o61”

The display automatically shows the application selection parameter “o61”.
Press SET to select the pre-installed application.
The display shows the default value (eg. “AP0” flashing).
Choose the application type by pressing UP/DOWN and press SET to confirm.
The controller presets parameter values according to the selected application and does not hide relevant parameters.
Tip: you can easily move from AP0 to AP6, and thus select the simplified list of parameters, by pressing the UP key (circular list).

App Description (e.g. for ERC 213 and ERC 214)
App 0 None (no preset application)
App 1 Medium temperature (2 – 6 °C), ventilated ref. units with timed natural defrost
App 2 Medium temperature (0 – 4 °C), ventilated ref. units with timed electrical defrost
App 3 Low temperature (-26 – -20 °C), ventilated ref. units with timed electrical defrost
App 4 Medium temperature (0 – 4 °C), ventilated ref. units with electrical defrost (by temperature)
App 5 Low temperature (-26 – -20 °C), ventilated ref. units with electrical defrost (by temperature)
App 6 None (no preset application) with simplified parameter list

Note: refer to chapter 2.4 - “Pre-defined Applications” for a complete description of the available applications.

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– STEP 4: select sensor type “o06”

The display automatically shows sensor selection parameter “o06”.
Press SET to select the sensor type.
The display shows the default value (eg. “n10” flashing).
Choose sensor type by pressing UP/DOWN (n5=NTC 5 K, n10=NTC 10 K, Ptc=PTC, Pt1=Pt1000) and press SET to confirm.

NOTE: all sensors must be the same type.

– STEP 5: configure DO4 output “o36”

The display automatically shows the “o36” parameter to configure “DO4” output. (Available only in 4 relays model).
Select light “Lig” or alarm “ALA” as per the application and press SET to confirm.
The display returns to normal display mode and the control is started.

5.3| Menu Structure

SET: press for 3 seconds to access
status, setup and service

1) Parameter groups

Password (if enabled)

Status input

Configuration

SET

2) Parameter name

Main switch

Application

Sensor type

3) Value

Application
1-2-3-4-5-6

SET

Application 0

Application
1-2-3-4-5-6

Scroll through the
parameter names

Scroll through the
parameter groups

DO4 configuration

(only for 4 relays model)

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5.4| Quick Configuration via “cFg” menu

– Press SET for three seconds to access the parameters groups.
– Select “CFg” menu and press SET to enter. The first menu “r12” (main switch) is displayed.
– Switch OFF main switch (r12=0) for changing the pre-installed application.
– Press UP/DOWN to scroll through the parameter list.
– Configure the “o61” parameter to select a pre-installed application:

– Press SET to access the “o61” parameter.
– Press UP/DOWN to select an application.
– Press SET to confirm, “o61” is displayed.

– Continue to set the next parameters (“o06” sensor type and “o36” DO4 configuration) in the “cFg” menu.

5.5| Adjust set point temperature

(short press) SET: adjust setpoint temperature.

UP/DOWN: change the temperature setpoint (in setting mode the setpoint flashes).

SET: save the temperature setpoint.

5.6| Initiate a manual defrost

DEFROST: press for 3 seconds to initiate a defsost.

DEFROST: press for 3 seconds to stop manual defrost.

The DEFROST icon is shown during defrost.

5.7| Initiate a pull down

PULL DOWN: press for 3 seconds to initiate pull down.

“Pud”: is shown for 3 seconds to indicate pull down.

The PULL DOWN icon flashes during pull down.

PULL DOWN: press for 3 seconds to stop pull down.

5.8| View active alarm

Temperature and alarm codes
alternate flashes until the alarm
is resolved. The alarm bell is shown.

5.9| Unlock keyboard

- After 5 minutes of no activity, the keypad is locked (if P76=yes).

- When the keypad is locked any button press shows “LoC” in the display.

- Press UP and DOWN buttons simultaneously for 3 seconds
to unlock the keyboard. “unl” is displayed for 3 seconds.

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6| Menu functions

Menu 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.
Stopped refrigeration will give a ”OFF” signal on the display.

-1=service (manual control of outputs allowed)
0=OFF
1=ON

o61 Predefined applications

Predefined applications is to give the user an easy and fast way to configure the controller refer to a specific
application based on storage temperature, defrost type and defrost method.
Users can set appropriate application 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.

o06 Sensor type selection

This parameter is for defining type of temperature sensors connected to the controller.
User can configure NTC 5 K, NTC 10 K, PTC and PT1000 sensors in this controller.
All the mounted sensors (Sair, S5 and Sc) must be of same type.

o36 DO4 configuration

This parameter is to configure 4th relay as light or Alarm in case of four relay controller (ERC 214).

Lig=light
ALA=alarm

r-- Reference

r00 Temperature setpoint

This parameter defines the desired cabinet temperature at which compressor cuts out.
The set value can be locked or limited to a range with the settings in “r02” and “r03”.

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 Minimum set point limitation

The minimum allowable setpoint value can be configured here to avoid setting too low values by
accident/mistake.

r03 Maximum set point limitation

The maximum allowable setpoint value can be configured here to avoid setting too high values by
accident/mistake.

r04 Display offset

Correction value in display temperature. If the temperature at the products and the temperature received by
the controller are not identical, an offset adjustment of the display temperature can be carried out under this
menu code.

r05 Display temperature 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 temperature settings to be automatically updated to respective unit.

r09 Calibration of Sair

Offset for air temperature calibration.
Compensation possibility due to long sensor cable.

r12 Main switch

With this setting refrigeration can be started, stopped or a manual override of the outputs can be allowed.
Stopped refrigeration 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 will be the setpoint plus this value when the controller changes over to night
operation. (Select a negative value if there is to be cold accumulation).
Activation can take place via digital input.

r40 Thermostat reference displacement offset temperature

The thermostat reference and the alarm values are shifted the following number of degrees when the
reference displacement is activated. Activation can take place via digital input.

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Menu code Parameter description

r96 Pull-down duration

Maximum duration of the pull-down mode.

r97 Pull-down limit temperature

A safety feature; the lowest temperature allowed during pull-down.

A-- Alarm

A03 Delay for temperature alarm during normal conditions

If the upper or the lower alarm limit values are exceeded, a timer function will commence.
The alarm will not become active until the set time delay has been passed.

A12 Delay for temperature alarm during pull-down/start-up/defrost

This time delay is used during start-up, during defrost, during pull-down. There will be change-over to the
normal alarm time delay “A03” when the temperature falls within the alarm limits.

A13 High temperature alarm limit

If the cabinet temperature stays above this limit for the time mentioned by the alarm delay, high temperature
alarm is raised.

A14 Low temperature alarm limit

If the cabinet temperature stays below this limit for the time mentioned by the alarm delay, low temperature
alarm is raised.

A27 DI1 delay

If “DI1” is configured as a door open alarm or as an external alarm, this delay is used to raise the respective
alarm.

A28 DI2 delay

If “DI2” is configured as a door open alarm or as an external alarm, this delay is used to raise the respective
alarm.

A37 Condenser high alarm limit

If the condenser temperature reaches above this limit, condenser alarm is raised immediately and no action is
taken. The alarm is zeroset if temperature falls 5 K below the set temperature.

A54 Condenser high block limit

If the condenser temperature continues to increase above the “A37” limit and reaches this temperature limit,
condenser block alarm is raised and compressor is stopped. It is restricted to starting again until alarm is reset
manually. Manual reset of condenser block alarm can be performed in two ways:

- Power controller OFF and power ON controller again.

- Switch controller OFF and ON again via main switch or front button.

A72 Voltage protection enable

This parameter is to enable and disable the voltage protection feature, which protects compressor from
adverse line voltage conditions.

A73 Minimum cut-in voltage

When the compressor is due to start, the voltage of the power supply will be checked and the compressor will
only be allowed to start if it is at least the value given in this parameter.

A74 Minimum cut-out voltage

When the compressor is running, it will be switched OFF if the voltage goes below that given in this parameter.

A75 Maximum voltage

When the compressor is running, it will be switched OFF if the voltage exceeds that given in this parameter.
If the compressor is already stopped, it will remain switched OFF.

d-- Defrost

d01 Defrost method

Here you set whether defrost is to be accomplished by electric, Hot gas or natural method.

no=none
nAt=natural
EL=electrical
gAS=gas

d02 Defrost stop temperature

This parameter defines at what temperature the defrost cycle will stop.
The temperature is given by the evaporator sensor or by the cabinet temperature sensor as defined in menu
code “d10”.

d03 Defrost interval

Defines the time period between the start of two defrost cycles. In case of power failure elapsed time is stored
in the memory and next defrost will happen after completing the defined time interval.

d04 Maximum defrost time

This parameter defines the defrost time when it is time based defrost. In case of temperature based defrost this
is treated as safety time to stop the defrost if it is not terminated based on the temperature.

18 FR · ERC 21X user manual · DKRCC.ES.RL0.H8.02 · ©Danfoss

Menu code Parameter description

d05 Defrost delay at power up or DI signal

This parameter decides the time offset when the defrost is triggered by digital inputs or during power up.
This function is only relevant if you have several refrigeration appliances or groups where you want the defrost
to be staggered in relation to one another.

d06 Drip-OFF time

This parameter defines the time delay to start the compressor after defrost heater being switched OFF.
This delay is generally provided to ensure all water droplets on the evaporator drips off before starting the
refrigeration cycle.

d07 Fan delay after defrost

Defines how long the delay is between the start of the compressor and the fan after defrost cycle.

d08 Fan start temperature after defrost

This only applies if an evaporator temperature sensor is fitted.
This parameter determines at what evaporator temperature the fan will start after a defrost cycle is complete.
If the time set in “d07” occurs before the temperature set in “d08”, the fan will start in line with “d07”.
If the temperature set in “d08” occurs first, then the fan will start in line with “d08”.

d09 Fan during defrost

This parameter is to define whether fan is to operate during defrost or not.

d10 Defrost stop sensor

This parameter is to define which sensor has to be used to exit/terminate the defrost.

non=none, defrost is based on time
Air=Sair sensor
dEF=S5 (defrost) sensor

d18 Compressor accumulated runtime to start defrost

When the accumulated compressor runtime is equal to the value set in this Parameter, defrost will be triggered.
If the compressor runtime is less than the set value during the define defrost interval “d03”, defrost will be
triggered based on the defrost interval “d03”. This feature is disabled when this parameter is set to zero.

d19 Defrost on demand

The controller will constantly monitor the “S5” temperature to estimate the ice buildup.
In between two defrosts, if the “S5” temperature become lower than the value defined here controller will
initiate the defrost on demand.
This feature is disabled when this parameter is set to 20. This function can only be used in 1:1 systems.

d30 Defrost delay after pull down

This parameter defines the time delay to start the defrost after pull down cycle.
This has to ensure defrost doesn’t happen immediately after pull down cycle.

F-- Fan control

F01 Fan at compressor cut-out

This parameter define the fan operation during compressor OFF cycle.

FAo=fan always ON
FFC=fan follow compressor
FPL=fan Pulsating

F04 Fan stop evaporating temperature

This parameter defines the maximum evaporator temperature at which the Fan must switch OFF.
If the defrost sensor registers a higher temperature than the one set here, the fans will be stopped to avoid the
warm air circulation in the cabinet.

F07 Fan ON cycle

This parameter is applicable only when the Fan at Compressor cut out “F01” is set to Fan Pulsating mode.
The Fan pulsating ON time will be as per the time set in this parameter.

F08 Fan OFF cycle

This parameter is applicable only when the Fan at Compressor cut out “F01” is set to Fan Pulsating mode.
The Fan pulsating OFF time will be as per the time set in this parameter.

c-- Compressor

C01 Compressor minimum ON time

This parameter determines the minimum number of minutes the compressor must run before a cut-out can
take effect based on temperature. This is to avoid sudden switching ON and OFF of the compressor.

C02 Compressor minimum OFF time

This parameter determines the minimum number of minutes the compressor must switched OFF before a
cut-in can take effect based on temperature. This is to avoid sudden switching OFF and ON of the compressor.

19FR · ERC 21X user manual · DKRCC.ES.RL0.H8.02 · ©Danfoss

Menu code Parameter description

C04 Compressor OFF delay at door open

This parameter sets the delay in minutes before the compressor stops when the door is opened.
If set to zero, the function is disabled.

C70 Zero crossing selection

This feature will increase the relay life time, reduce the contact welding and switching noise by switching ON
at Zero crossing. Disable zero crossing when external relay is used.

o-- Others

o01 Delay of outputs at startup

After start-up the controller functions can be delayed by the time delay defined here so that overloading of the
electricity supply network is avoided.

o02 DI1 configuration

Here you can configure the DI1 to one of the functions listed below.

oFF=not used
Sdc=status display output
doo=door alarm with resumption (door function). When the input is open it signals that the door is open.

Compressor/heater and fan are stopped after “C04 Compressor door open delay”. After the time mentioned by
“DI1 Delay” from the time door is opened, an alarm will be given and refrigeration will be resumed.
doA=door alarm without resumption (door alarm). When the input is open it signals that the door is open.
Compressor/heater and fan are stopped after “C04 Compressor door open delay” and will stay off until the door
is closed. After the time mentioned by “DI1 Delay” from the time door is opened, an alarm will be given
(and refrigeration will not be resumed).
SCH=main switch. Regulation is carried out when the input is short-circuited, and regulation is stopped when
the input is put in position OFF.

nig=day/night mode. When the input is short-circuited, there will be regulation for night operation.
rFd=reference displacement. Value in “r40” is added to the reference “r00” when the input is short-circuited
EAL=external alarm. Alarm will be given when the input is short-circuited.
dEF=defrost. Defrost is initiated when the input is short-circuited. Edge triggering is used. Defrost exit can take

place by time, temperature or by manually pressing defrost push button on the front panel.
Pud=pull down. Pull down is initiated when the input is short-circuited. Edge triggering is used.
It will come out of pull down based on time and temperature defined under parameter “r96” and “r97” or can be
stopped manually by pressing pull down push button on front panel.

Sc=condenser sensor

o03 Serial address

Data communication is possible through external TTL to RS485 gateway.

o05 Password

If the settings in the controller are to be protected with an access code you can set a numerical value between
0 and 999. You can cancel the function by setting to 0.

o06 Sensor type selection

This parameter is for defining type of temperature sensors connected to the controller.
User can configure NTC 5 K, NTC 10 K, PTC and PT1000 sensors in this controller.
All the mounted sensors (Sair, S5 and Sc)must be of same type.

o07 Cooling/heating

This parameter is applicable only for single relay controller (ERC 211) for selecting cooling or heating
application.

o15 Display resolution

This parameter defines the steps in which the temperature must be displayed by 0.1 or 0.5 or 1.

o23 Relay 1 counter

The number of cycles for the “DO1” relay can be read in this menu.
The read value is multiplied by 100 to obtain the number of cycles.
On reaching 999x100 cycles the counts stops and is reset to 0.

o24 Relay 2 counter

The number of cycles for the “DO2” relay can be read in this menu.
The read value is multiplied by 100 to obtain the number of cycles.
On reaching 999x100 cycles the counts stops and is reset to 0.

o25 Relay 3 counter

The number of cycles for the DO3 relay can be read in this menu.
The read value is multiplied by 100 to obtain the number of cycles.
On reaching 999x100 cycles the counts stops and is reset to 0.

20 FR · ERC 21X user manual · DKRCC.ES.RL0.H8.02 · ©Danfoss

Menu code Parameter description

o26 Relay 4 counter

The number of cycles for the DO4 relay can be read in this menu.
The read value is multiplied by 100 to obtain the number of cycles.
On reaching 999x100 cycles the counts stops and is reset to 0.

o36 DO4 configuration

This parameter is to configure 4th relay as light or Alarm in case of 4 relay controller (ERC 214).

Lig=light
ALA=alarm

o37 DI2 configuration

Here you can configure the DI1 to one of the functions listed below

oFF=not used
Sdc=status display output
doo=door alarm with resumption (door function). When the input is open it signals that the door is open.

Compressor/heater and fan are stopped after “C04 Compressor door open delay”. After the time mentioned by
“DI1 Delay” from the time door is opened, an alarm will be given and refrigeration will be resumed.
doA=door alarm without resumption (door alarm). When the input is open it signals that the door is open.
Compressor/heater and fan are stopped after “C04 Compressor door open delay” and will stay off until the door
is closed. After the time mentioned by “DI1 Delay” from the time door is opened, an alarm will be given
(and refrigeration will not be resumed).
SCH=main switch. Regulation is carried out when the input is short-circuited, and regulation is stopped when
the input is put in position OFF.

nig=day/ night mode. When the input is short-circuited, there will be regulation for night operation.
rFd=reference displacement. Value in “r40” is added to the reference “r00” when the input is short-circuited.
EAL=external alarm. Alarm will be given when the input is short-circuited.
dEF=defrost. Defrost is initiated when the input is short-circuited. Edge triggering is used. Defrost exit can take

place by time, temperature or by manually pressing defrost push button on the front panel
Pud=pull down. Pull down is initiated when the input is short-circuited. Edge triggering is used.
It will come out of pull down based on time and temperature defined under parameter “r96” and “r97” or can be
stopped manually by pressing pull down push button on front panel.

o38 Light control

This parameter defines the way the light must be controlled. Below are the three light control modes available.

on=always on
dAn=day/night
doo=based on door action

o61 Predefined applications

Predefined applications is to give the user an easy and fast way to configure the controller to a specific
application based on storage temperature, defrost type and defrost method.
Users can set appropriate application 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.

o67 Save settings as factory

This parameter when set to YES. The current controller Parameter settings are stored as Factory default.
WARNING: original factory settings are overwritten.

o71 DO2 configuration

Here you can configure the second relay as defrost or alarm in case of three relay controller (ERC213).

dEF=defrost
ALA=alarm

o91 Display at defrost

You can set what is to be displayed during defrost here.

Air=actual air temperature
FrE=freezed temperature( display the temperature just before starting defrost)

-d-=”-d-” is displayed

21FR · ERC 21X user manual · DKRCC.ES.RL0.H8.02 · ©Danfoss

Menu code Parameter description
P-- Polarity

P73 DI1 input polarity

no (normally open)=associated functionality is activated when “DI1” port is short circuit.
The associated function is deactivated when “DI1” port is open circuit.
nc (normally closed)=associated functionality is activated when “DI1” port is open circuit and deactivated
when “DI1” port is short circuit.

P74 DI2 input polarity

no (normally open)=associated functionality is activated when “DI2” port is short circuit.
The associated function is deactivated when “DI2” port is open circuit.
nc (normally closed)=associated functionality is activated when “DI2” port is open circuit and deactivated
when “DI2” port is short circuit.

P75 Invert alarm relay

Alarm relay operation can be inverted here

0=normal
1=invert relay action

P76 Key board lock enable

YES=enable keyboard lock functionality after 5 minutes of no activity on the keypad.

22 FR · ERC 21X user manual · DKRCC.ES.RL0.H8.02 · ©Danfoss

7| Parameter table

7.1| Parameter table - ERC 211

Parameter name - ERC 211 Code Min Max Unit

Configuration cFg

Main switch

-1=service, 0=OFF, 1=ON

Predefined applications

AP0, AP1, AP2, AP3, AP4, AP5

Sensor type selection

n5=NTC 5 K, n10=NTC 10 K,
Ptc=PTC, Pt1=Pt1000

Reference/thermostat r--

Temperature setpoint r00 -100.0 200.0 C/F 2.0 8.0 4.0 4.0 40.0 2.0
Differential r01 0.1 20.0 K 2.0 2.0 2.0 2.0 2.0 2.0
Min set point limitation r02 -100.0 200.0 C/F -35.0 4.0 2.0 2.0 20.0 -35.0
Max set point limitation r03 -100.0 200.0 C/F 50.0 20.0 6.0 6.0 60.0 50.0
Display offset

(correction value in display
temperature)

Display unit (°C/°F) r05 -C -F -C -C -C -C -C -C
Calibration of Sair

(offset for air temperature
calibration)

Main switch

-1=service, 0=OFF, 1=ON

Night set back
(offset temperature during night
mode)

Thermostat reference
displacement

(offset temperature)

Pull-down duration r96 0 960 min 0 - 0 0 - -
Pull-down limit temperature r97 -100.0 200.0 C/F 0.0 - 0.0 0.0 - -

Alarm A--

Delay for temperature alarm

during normal conditions
Delay for temperature alarm

during pull-down/start-up/
defrost

High temperature alarm limit

(Cabinet/room)

Low temperature alarm limit A14 -100.0 200.0 C/F -30.0 0.0 0.0 0.0 10 -30.0
DI1 delay

(time delay for selected DI1
function)

Condenser high alarm limit
Condenser high block limit A54 0 200 C/F 85 85 85 85 - -
Voltage protection enable
Minimum cut-in voltage A73 0 270 V 0 0 0 0 0 0

Note: hidden parameters are greyed out

r12 -1 1 1 1 1 1 1 1

o61 AP0 AP5 AP0 AP1 AP2 AP3 AP4 AP5

o06 n5 Pt1 n10 n10 n10 n10 n10 n10

r04 -10.0 10.0 K 0.0 0.0 0.0 0.0 0.0 0.0

r09 -20.0 20.0 K 0.0 0.0 0.0 0.0 0.0 -

r12 -1 1 1 1 1 1 1 -

r13 -50.0 50.0 K 0.0 0.0 0.0 0.0 0.0 0.0

r40 -50.0 50.0 K 0.0 0.0 0.0 0.0 0.0 -

A03 0 240 min 30 45 45 45 30 30

A12 0 240 min 60 60 90 90 60 60

A13 -100.0 200.0 C/F 8.0 16 10 10 80 8.0

A27 0 240 min 30 30 30 30 30 30

A37 0 200 C/F 80 80 80 80 - -

A72 no yES no no no no no no

App. 0

(Def.)

App. 1 App. 2 App. 3 App. 4 App. 5

23FR · ERC 21X user manual · DKRCC.ES.RL0.H8.02 · ©Danfoss

Parameter name - ERC 211 Code Min Max Unit

Minimum cut-out voltage
Maximum voltage A75 0 270 V 270 270 270 270 270 270

Defrost d--

Defrost method

no=no defrost, nAt=natural

Defrost stop temperature
Defrost interval d03 0 240 hours 8 - 6 6 - 8
Max defrost time d04 0 480 min 30 - 45 60 - 30
Defrost delay at power up

(or DI signal)

Drip delay d06 0 60 min 0 - 0 0 - -
Defrost stop sensor

configuration non=time,
Air=Sair (air temperature)

Compressor accumulated

runtime to start defrost

0=OFF

Defrost delay after pull-down

0=OFF

Compressor c--

Compressor minimum ON time C01 0 30 min 0 0 0 0 0 0.0
Compressor minimum OFF time C02 0 30 min 2 2 2 2 2 2.0
Compressor OFF delay

at door open
Zero crossing selection C70 no yES yES yES yES yES yES yES

Others o--

Delay of outputs

at startup

DI1 configuration

oFF=not used,
Sdc=status display output,
doo=door alarm with resumption,
doA=door alarm without resumption,
SCH = main switch, nig=day/ night
mode, rFd=reference displacement,
EAL=external alarm, dEF=defrost,
Pud=pull-down,
Sc=condenser sensor

Serial address
Password o05 no 999 no no no no no no
Sensor type selection

n5=NTC 5 K, n10=NTC 10 K,
Ptc=PTC, Pt1=Pt1000

Cooling/heating

rE=refrigeration (cooling)
Ht=heating

Display resolution

0.1=steps of 0.1 °C

0.5=steps of 0.5 °C,

1.0=steps of 1.0 °C

Relay 1 counter

(1 count=100 cycles of
operation)

Note: hidden parameters are greyed out

A74 0 270 V 0 0 0 0 0 0

d01 no nAt no no nAt nAt no no

d02 0.0 50.0 C/F 6.0 - - 8 - 6.0

d05 0 240.0 min 0 - 0 0 - -

d10 non Air non - non Air - non

d18 0 96 hours 0 - 0 0 - -

d30 0 960 min 0 - 0 0 - -

C04 0 15 min 0 0 0 0 0 1

o01 0 600 min 5 5 5 5 5 5

o02 oFF Sc oFF oFF oFF oFF oFF oFF

o03 0 247 0 0 0 0 0 -

o06 n5 Pt1 n10 n10 n10 n10 n10 -

o07 rE Ht rE rE rE rE Ht rE

o15 0.1 1.0 0.1 0.1 0.1 0.1 0.1 0.1

o23 0 999 0 0 0 0 0 -

App. 0

(Def.)

App. 1 App. 2 App. 3 App. 4 App. 5

24 FR · ERC 21X user manual · DKRCC.ES.RL0.H8.02 · ©Danfoss

Parameter name - ERC 211 Code Min Max Unit

Predefined applications
Save settings as factory

WARNING: the earlier factory
settings are overwritten

Display at defrost

Air=actual air temperature,
FrE=freezed temperature,

-d-="-d-" is displayed

Polarity P--

DI1 input polarity

nc=normally closed,
no=normally open

Keyboard lock enable P76 no yES no no no no no -

Readouts u--

Controller status

S0=cooling ON/Heating ON,
S2=wait for compressor ON time
to elapse,
S3=wait for compressor OFF time
to elapse-restart time,
S4=drip OFF delay after defrost,
S10=cooling stop
S11=cooling stopped by
thermostat/heating OFF,
S14=defrosting state,
S15=fan delay state after defrost,
S17=door open (DI input),
S20=emergency cooling,
S25=manual control of outputs,
S30=continous cycle/Pull-down,
S32=delay of outputs at power up

Air temperature (Sair)
Read the present regulation

reference
DI1 input u10 oFF on ---
Status of night operation u13 oFF on ---
Condenser temperature (Sc) U09 -100.0 200.0 C/F ---
Compressor relay status u58 oFF on ---
Firmware version readout u80 000 999 ---

Note: hidden parameters are greyed out

o61 AP0 AP5 AP0 AP1 AP2 AP3 AP4 -

o67 no yES no no no no no -

o91 Air -d- -d- - -d- -d- - -d-

P73 nc no no no no no no no

u00 S0 S32 --

u01 -100.0 200.0 C/F ---

u02 -100.0 200.0 C/F ---

App. 0

(Def.)

App. 1 App. 2 App. 3 App. 4 App. 5

25FR · ERC 21X user manual · DKRCC.ES.RL0.H8.02 · ©Danfoss

7.2| Parameter table - ERC 213

Parameter Name - ERC 213 Code Min Max Unit

Configuration cFg

Main switch

-1=service, 0=OFF, 1=ON

Predefined applications

AP0, AP1, AP2, AP3, AP4, AP5, AP6

Sensor type selection

n5=NTC 5 K, n10=NTC 10 K,
Ptc=PTC, Pt1=Pt1000

Reference/thermostat r--

Temperature setpoint r00 -100.0 200.0 C/F 2.0 4.0 2.0 -24.0 2.0 -24.0 2.0
Differential r01 0.1 20.0 K 2.0 2.0 2.0 2.0 2.0 2.0 2.0
Min set point limitation r02 -100.0 200.0 C/F -35.0 2.0 0.0 -26.0 0.0 -26.0 -35.0
Max set point limitation r03 -100.0 200.0 C/F 50.0 6.0 4.0 -20.0 4.0 -20.0 50.0
Display offset

(correction value in display
temperature)

Display Unit (°C/°F) r05 -C -F -C -C -C -C -C -C -C
Calibration of Sair

(offset for air temperature
calibration)

Main switch

-1=service, 0=OFF, 1=ON

Night set back
(offset temperature during night
mode)

Thermostat reference
displacement

(offset temperature)

Pull-down duration r96 0 960 min 0 0 0 0 0 0 -
Pull-down limit temperature r97 -100.0 200.0 C/F 0.0 0.0 0.0 0.0 0.0 0.0 -

Alarm A--

Delay for temperature alarm

during normal conditions
Delay for temperature alarm

during pull-down/start-up/
defrost

High temperature alarm limit

(Cabinet/Room)

Low temperature alarm limit A14 -100.0 200.0 C/F -30.0 0.0 -2.0 -30.0 -2.0 -30.0 -30.0
DI1 delay

(time delay for selected DI1
function)

DI2 delay
(time delay for selected DI2
function)

Condenser high alarm limit A37 0 200 C/F 80 80 80 80 80 80 -
Condenser high block limit A54 0 200 C/F 85 85 85 85 85 85 -
Voltage protection enable A72 no yES no no no no no no no
Minimum cut-in voltage A73 0 270 V 0 0 0 0 0 0 0
Minimum cut-out voltage A74 0 270 V 0 0 0 0 0 0 0
Maximum voltage A75 0 270 V 270 270 270 270 270 270 270

Note: hidden parameters are greyed out

r12 -1 1 1 1 1 1 1 1 1

o61 AP0 AP6 AP0 AP1 AP2 AP3 AP4 AP5 AP6

o06 n5 Pt1 n10 n10 n10 n10 n10 n10 n10

r04 -10.0 10.0 K 0.0 0.0 0.0 0.0 0.0 0.0 0.0

r09 -20.0 20.0 K 0.0 0.0 0.0 0.0 0.0 0.0 -

r12 -1 1 1 1 1 1 1 1 -

r13 -50.0 50.0 K 0.0 0.0 0.0 0.0 0.0 0.0 0.0

r40 -50.0 50.0 K 0.0 0.0 0.0 0.0 0.0 0.0 -

A03 0 240 min 30 45 30 30 30 30 30

A12 0 240 min 60 90 60 60 60 60 60

A13 -100.0 200.0 C/F 8.0 10.0 8.0 -15.0 8.0 -15.0 8.0

A27 0 240 min 30 30 30 30 30 30 30

A28 0 240 min 30 30 30 30 30 30 30

App. 0

(Def.)

App. 1 App. 2 App. 3 App. 4 App. 5 App. 6

26 FR · ERC 21X user manual · DKRCC.ES.RL0.H8.02 · ©Danfoss

Parameter Name - ERC 213 Code Min Max Unit

Defrost d--

Defrost method

no=no defrost, nAt=natural,
EL=electrical, gAS=hot gas

Defrost stop temperature d02 0.0 50.0 C/F 6.0 - - - 6.0 6.0 6.0
Defrost interval d03 0 240 hours 8 6 8 12 8 12 8
Max defrost time d04 0 480 min 30 45 15 15 30 30 30
Defrost delay at power up

(or DI signal)

Drip delay d06 0 60 min 0 0 0 0 0 0 5
Fan delay after defrost d07 0 60 min 0 0 0 0 0 0 5
Fan start temperature

after defrost

Fan during defrost d09 oFF on on on on on on on on
Defrost stop sensor

configuration non=time,
Air=Sair (air temperature),
dEF=S5 (defrost sensor)

Compressor accumulated

runtime to start defrost

0=OFF

Defrost on demand

20.0=OFF

Defrost delay after pull-down

0=OFF

Fan control F--

Fan at compressor cutout

FFc=fan follow compressor,
FAo=fan always ON,
FPL= fan pulsating

Fan stop evaporator
temperature

50.0=OFF

Fan ON cycle F07 0 15 min 2 2 2 2 2 2 2
Fan OFF cycle F08 0 15.0 min 2 2 2 2 2 2 2

Compressor c--

Compressor minimum ON time C01 0 30 min 0 0 0 0 0 0 0
Compressor minimum OFF time C02 0 30 min 2 2 2 2 2 2 2
Compressor OFF delay

at door open

Note: hidden parameters are greyed out

d01 no gAS EL nAt EL EL EL EL EL

d05 0 240.0 min 0 0 0 0 0 0 -

d08 -50.0 0.0 C/F -5.0 - - - -5.0 -5.0 -

d10 non dEF non non non non dEF dEF non

d18 0 96 hours 0 0 0 0 0 0 -

d19 0.0 20.0 K 20.0 - - - 20.0 20.0 -

d30 0 960 min 0 0 0 0 0 0 -

F01 FFc FPL FAo FAo FA o FAo FA o FAo FAo

F04 -50.0 50.0 C/F 50.0 - - - 50.0 50.0 -

C04 0 15 min 0 0 0 0 0 0 1

App. 0

(Def.)

App. 1 App. 2 App. 3 App. 4 App. 5 App. 6

27FR · ERC 21X user manual · DKRCC.ES.RL0.H8.02 · ©Danfoss

Parameter Name - ERC 213 Code Min Max Unit

Zero crossing selection C70 no yES yES yES yES yES yES yES yES

Others o--

Delay of outputs

at startup

DI1 configuration

oFF=not used,
Sdc=status display output,
doo=door alarm with resumption,
doA=door alarm without resumption,
SCH=main switch, nig=day/ night
mode, rFd=reference displacement,
EAL=external alarm, dEF=defrost,
Pud=pull-down,
Sc=condenser sensor

Serial address o03 0 247 0 0 0 0 0 0 -
Password o05 no 999 no no no no no no no
Sensor type selection

n5=NTC 5 K, n10=NTC 10 K,
Ptc=PTC, Pt1=Pt1000

Display resolution

0.1=steps of 0.1 °C

0.5=steps of 0.5 °C,

1.0=steps of 1.0 °C

Relay 1 counter

(1 count=100 cycles of
operation)

Relay 2 counter

(1 count=100 cycles of
operation)

Relay 3 counter

(1 count=100 cycles of
operation)

DI2 configuration

oFF=not used,
Sdc=status display output,
doo=door alarm with resumption,
doA=door alarm without resumption,
SCH=main switch,
nig=day/night mode,
rFd=reference displacement,
EAL=external alarm, dEF=defrost,
Pud=pull-down

Predefined applications o61 AP0 AP6 AP0 AP1 AP2 AP3 AP4 AP5 -
Save settings as factory

WARNING: the earlier factory
settings are overwritten

DO2 config

dEF=defrost; ALA=alarm

Display at defrost

Air=actual air temperature,
FrE=freezed temperature,

-d-="-d-" is displayed
Note: hidden parameters are greyed out

o01 0 600 min 5 5 5 5 5 5 5

o02 oFF Sc oFF oFF oFF oFF oFF oFF oFF

o06 n5 Pt1 n10 n10 n10 n10 n10 n10 -

o15 0.1 1.0 0.1 0.1 0.1 0.1 0.1 0.1 0.1

o23 0 999 0 0 0 0 0 0 -

o24 0 999 0 0 0 0 0 0 -

o25 0 999 0 0 0 0 0 0 -

o37 oFF Pud oFF oFF oFF oFF oFF oFF oFF

o67 no yES no no no no no no -

o71 dEF ALA dEF ALA dEF dEF dEF dEF dEF

o91 Air -d- -d- -d- -d- -d- -d- -d- -d-

App. 0

(Def.)

App. 1 App. 2 App. 3 App. 4 App. 5 App. 6

28 FR · ERC 21X user manual · DKRCC.ES.RL0.H8.02 · ©Danfoss

Parameter Name - ERC 213 Code Min Max Unit

Polarity P--

DI1 input polarity

nc=normally closed,
no=normally open

DI2 input polarity

nc=normally closed,
no=normally open

Invert alarm relay

0=normal, 1=invert relay action

Keyboard lock enable P76 no yES no no no no no no -

Readouts u--

Controller Status

S0=cooling ON/Heating ON,
S2=wait for compressor ON time
to elapse,
S3=wait for compressor OFF time
to elapse-restart time,
S4=drip OFF delay after defrost,
S10=cooling stop
S11=cooling stopped by
thermostat/heating OFF,
S14=defrosting state,
S15=fan delay state after defrost,
S17=door open (DI input),
S20=emergency cooling,
S25=manual control of outputs,
S30=continous cycle/Pull-down,
S32=delay of outputs at power up

Air temperature (Sair) u01 -100.0 200.0 C/F ---
Read the present regulation

reference
Defrost temperature (S5) u09 -100.0 200.0 C/F --- - - -
DI1 input u10 oFF on ---
Status of night operation u13 oFF on ---
DI2 input u37 oFF on ---
Condenser temperature (Sc) U09 -100.0 200.0 C/F ---
Compressor relay status u58 oFF on ---
Fan relay status u59 oFF on ---
Defrost relay status u60 oFF on ---
Light relay status u63 oFF on ---
Firmware version readout u80 000 999 ---

Note: hidden parameters are greyed out

P73 nc no no no no no no no no

P74 nc no no no no no no no no

P75 0 1 0 0 - - - - -

u00 S0 S32 --

u02 -100.0 200.0 C/F ---

App. 0

(Def.)

App. 1 App. 2 App. 3 App. 4 App. 5 App. 6

29FR · ERC 21X user manual · DKRCC.ES.RL0.H8.02 · ©Danfoss

7.3| Parameter table - ERC 214

Parameter name - ERC 214 Code Min Max Unit

Configuration cFg

Main switch

-1=service, 0=OFF, 1=ON

Predefined applications

AP0, AP1, AP2, AP3, AP4, AP5, AP6

Sensor type selection

n5=NTC 5 K, n10=NTC 10 K,
Ptc=PTC, Pt1=Pt1000

DO4 configuration

Lig=light, ALA=alarm

Reference/thermostat r--

Temperature setpoint r00 -100.0 200.0 C/F 2.0 4.0 2.0 -24.0 2.0 -24.0 2.0
Differential r01 0.1 20.0 K 2.0 2.0 2.0 2.0 2.0 2.0 2.0
Min set point limitation r02 -100.0 200.0 C/F -35.0 2.0 0.0 -26.0 0.0 -26.0 -35.0
Max set point limitation r03 -100.0 200.0 C/F 50.0 6.0 4.0 -20.0 4.0 -20.0 50.0
Display offset

(correction value in display
temperature)

Display Unit (°C/°F) r05 -C -F -C -C -C -C -C -C -C
Calibration of Sair

(offset for air temperature
calibration)

Main switch

-1=service, 0=OFF, 1=ON

Night set back
(offset temperature during night
mode)

Thermostat reference
displacement
(offset temperature)

Pull-down duration r96 0 960 min 0 0 0 0 0 0 -
Pull-down limit temperature r97 -100.0 200.0 C/F 0.0 0.0 0.0 0.0 0.0 0.0 -

Alarm A--

Delay for temperature alarm

during normal conditions
Delay for temperature alarm

during pull-down/start-up/
defrost

Note: hidden parameters are greyed out

r12 -1 1 1 1 1 1 1 1 1

o61 AP0 AP6 AP0 AP1 AP2 AP3 AP4 AP5 AP6

o06 n5 Pt1 n10 n10 n10 n10 n10 n10 n10

o36 Lig ALA Lig Lig Lig Lig Lig Lig Lig

r04 -10.0 10.0 K 0.0 0.0 0.0 0.0 0.0 0.0 0.0

r09 -20.0 20.0 K 0.0 0.0 0.0 0.0 0.0 0.0 -

r12 -1 1 1 1 1 1 1 1 -

r13 -50.0 50.0 K 0.0 0.0 0.0 0.0 0.0 0.0 0.0

r40 -50.0 50.0 K 0.0 0.0 0.0 0.0 0.0 0.0 -

A03 0 240 min 30 45 30 30 30 30 30

A12 0 240 min 60 90 60 60 60 60 60

App. 0

(Def.)

App. 1 App. 2 App. 3 App. 4 App. 5 App. 6

30 FR · ERC 21X user manual · DKRCC.ES.RL0.H8.02 · ©Danfoss

Parameter name - ERC 214 Code Min Max Unit

High temperature alarm limit

(Cabinet/Room)

Low temperature alarm limit A14 -100.0 200.0 C/F -30.0 0.0 -2.0 -30.0 -2.0 -30.0 -30.0
DI1 delay

(time delay for selected DI1
function)

DI2 delay
(time delay for selected DI2
function)

Condenser high alarm limit A37 0 200 C/F 80 80 80 80 80 80 -
Condenser high block limit A54 0 200 C/F 85 85 85 85 85 85 -
Voltage protection enable A72 no yES no no no no no no no
Minimum cut-in voltage A73 0 270 V 0 0 0 0 0 0 0
Minimum cut-out voltage A74 0 270 V 0 0 0 0 0 0 0
Maximum voltage A75 0 270 V 270 270 270 270 270 270 270

Defrost d--

Defrost method

no=no defrost, nAt=natural,
EL=electrical, gAS=hot gas

Defrost stop temperature d02 0.0 50.0 C/F 6.0 - - - 6.0 6.0 6.0
Defrost interval d03 0 240 hours 8 6 8 12 8 12 8
Max defrost time d04 0 480 min 30 45 15 15 30 30 30
Defrost delay at power up

(or DI signal)

Drip delay d06 0 60 min 0 0 0 0 0 0 5
Fan delay after defrost d07 0 60 min 0 0 0 0 0 0 5
Fan start temperature

after defrost

Fan during defrost d09 oFF on on on on on on on on
Defrost stop sensor

configuration non=time,
Air=Sair (air temperature),
dEF=S5 (defrost sensor)

Compressor accumulated

runtime to start defrost

0=OFF

Defrost on demand

20.0=OFF

Defrost delay after pull-down

0=OFF

Fan control F--

Fan at compressor cutout

FFc=fan follow compressor,
FAo=fan always ON,
FPL= fan pulsating

Fan stop evaporator
temperature

50.0=OFF

Fan ON cycle F07 0 15 min 2 2 2 2 2 2 2
Fan OFF cycle F08 0 15.0 min 2 2 2 2 2 2 2

Compressor c--

Compressor minimum ON time C01 0 30 min 0 0 0 0 0 0 0
Compressor minimum OFF time C02 0 30 min 2 2 2 2 2 2 2
Compressor OFF delay

at door open
Zero crossing selection C70 no yES yES yES yES yES yES yES yES

Note: hidden parameters are greyed out

A13 -100.0 200.0 C/F 8.0 10.0 8.0 -15.0 8.0 -15.0 8.0

A27 0 240 min 30 30 30 30 30 30 30

A28 0 240 min 30 30 30 30 30 30 30

d01 no gAS EL nAt EL EL EL EL EL

d05 0 240.0 min 0 0 0 0 0 0 -

d08 -50.0 0.0 C/F -5.0 - - - -5.0 -5.0 -

d10 non dEF non non non non dEF dEF non

d18 0 96 hours 0 0 0 0 0 0 -

d19 0.0 20.0 K 20.0 - - - 20.0 20.0 -

d30 0 960 min 0 0 0 0 0 0 -

F01 FFc FPL FAo FAo FA o FAo FA o FAo FAo

F04 -50.0 50.0 C/F 50.0 - - - 50.0 50.0 -

C04 0 15 min 0 0 0 0 0 0 1

App. 0

(Def.)

App. 1 App. 2 App. 3 App. 4 App. 5 App. 6

31FR · ERC 21X user manual · DKRCC.ES.RL0.H8.02 · ©Danfoss

Parameter name - ERC 214 Code Min Max Unit

Others o--

Delay of outputs

at startup

DI1 configuration

oFF=not used,
Sdc=status display output,
doo=door alarm with resumption,
doA=door alarm without resumption,
SCH = main switch, nig=day/ night
mode, rFd=reference displacement,
EAL=external alarm, dEF=defrost,
Pud=pull-down,
Sc=condenser sensor

Serial address o03 0 247 0 0 0 0 0 0 -
Password o05 no 999 no no no no no no 0
Sensor type selection

n5=NTC 5 K, n10=NTC 10 K,
Ptc=PTC, Pt1=Pt1000

Display Resolution

0.1=steps of 0.1 °C

0.5=steps of 0.5 °C,

1.0=steps of 1.0 °C

Relay 1 counter

(1 count=100 cycles of
operation)

Relay 2 counter

(1 count=100 cycles of
operation)

Relay 3 counter

(1 count=100 cycles of
operation)

Relay 4 counter

(1 count=100 cycles of
operation)

DO4 configuration

ALA=alarm, Lig=light

DI2 configuration

oFF=not used,
Sdc=status display output,
doo=door alarm with resumption,
doA=door alarm without resumption,
SCH=main switch,
nig=day/night mode,
rFd=reference displacement,
EAL=external alarm, dEF=defrost,
Pud=pull-down

Light Control

on=always on, dAn=day/night,
doo=based on door action

Predefined applications o61 AP0 AP6 AP0 AP1 AP2 AP3 AP4 AP5 -
Save settings as factory

WARNING: the earlier factory
settings are overwritten

Display at defrost

Air=actual air temperature,
FrE=freezed temperature,

-d-="-d-" is displayed
Note: hidden parameters are greyed out

o01 0 600 min 5 5 5 5 5 5 5

o02 oFF Sc oFF oFF oFF oFF oFF oFF oFF

o06 n5 Pt1 n10 n10 n10 n10 n10 n10 -

o15 0.1 1.0 0.1 0.1 0.1 0.1 0.1 0.1 0.1

o23 0 999 0 0 0 0 0 0 -

o24 0 999 0 0 0 0 0 0 -

o25 0 999 0 0 0 0 0 0 -

o26 0 999 0 0 0 0 0 0 -

o36 ALA Lig Lig Lig Lig Lig Lig Lig -

o37 oFF Pud oFF oFF oFF oFF oFF oFF oFF

o38 on doo on on on on on on on

o67 no yES no no no no no no -

o91 Air -d- -d- -d- -d- -d- -d- -d- -d-

App. 0

(Def.)

App. 1 App. 2 App. 3 App. 4 App. 5 App. 6

32 FR · ERC 21X user manual · DKRCC.ES.RL0.H8.02 · ©Danfoss

Parameter name - ERC 214 Code Min Max Unit

Polarity P--

DI1 input polarity

nc=normally closed,
no=normally open

DI2 input polarity

nc=normally closed,
no=normally open

Invert alarm relay

0=normal, 1=invert relay action

Keyboard lock enable P76 no yES no no no no no no -

Readouts u--

Controller status

S0=cooling ON/Heating ON,
S2=wait for compressor ON time
to elapse,
S3=wait for compressor OFF time
to elapse-restart time,
S4=drip OFF delay after defrost,
S10=cooling stop
S11=cooling stopped by
thermostat/heating OFF,
S14=defrosting state,
S15=fan delay state after defrost,
S17=door open (DI input),
S20=emergency cooling,
S25=manual control of outputs,
S30=continous cycle/Pull-down,
S32=delay of outputs at power up

Air temperature (Sair) u01 -100.0 200.0 C/F ---
Read the present regulation

reference
Defrost temperature (S5) u09 -100.0 200.0 C/F --- - - -
DI1 input u10 oFF on ---
Status of night operation u13 oFF on ---
DI2 input u37 oFF on ---
Condenser temperature (Sc) U09 -100.0 200.0 C/F ---
Compressor relay status u58 oFF on ---
Fan relay status u59 oFF on ---
Defrost relay status u60 oFF on ---
Alarm relay status u62 oFF on ---
Light relay status u63 oFF on ---
Firmware version readout u80 000 999 ---

Note: hidden parameters are greyed out

P73 nc no no no no no no no no

P74 nc no no no no no no no no

P75 0 1 0 0 0 0 0 0 -

u00 S0 S32 --

u02 -100.0 200.0 C/F ---

App. 0

(Def.)

App. 1 App. 2 App. 3 App. 4 App. 5 App. 6

33FR · ERC 21X user manual · DKRCC.ES.RL0.H8.02 · ©Danfoss

7.4| Alarm Code

Alarm status Alarm Code

Air temperature sensor (Sair) error E29
Defrost sensor (S5) error E27
Condenser sensor (Sc) error E30
High temperature alarm A01
Low temperature alarm A02
High voltage alarm A99
Low voltage alarm AA1
High condenser temperature alarm A61
Door alarm A04
Standby alarm A45
DI external alarm A15

7.5| Troubleshooting

Problem Probable cause Remedy

Waiting for compressor delay timer

Defrost in progress

Compressor does not start

Line voltage to compressor too low or
too high

Defrost does not start Controller in pull down mode

Pull-down does not start

Wrong temperature displayed Wrong type of sensor selected

Pull-down max duration is 0
Pull-down limit temperature too high

Check c-- ➝ “C02”
Check d-- ➝ “d03”

Check d-- ➝ “d19”
Check A-- ➝ “A72”

Check A-- ➝ “A73”
Check A-- ➝ “A75”

Check r-- ➝ “r96”
Check r-- ➝ “r96”

Check r-- ➝ “r97”
Check cFg ➝ “o06”

8| Ordering

Type Description Relay Number Code no.
ERC 211 RED LED, 115 V, Single/Multi Pack 1 1 080G3290
ERC 211 RED LED, 115 V, 1 sensor (NTC 10 kOhm at 25°C, L=1,5m), Single/Multi Pack 1 1 080G3262
ERC 213 RED LED, 115 V, Single/Multi Pack 3 1 080G3291
ERC 213 RED LED, 115 V, 2 sensors (NTC 10 kOhm at 25°C, L=1,5m), Single/Multi Pack 3 1 080G3264
ERC 214 RED LED, 115 V, Single/Multi Pack 4 1 080G3292

ERC 211 RED LED, 230 V, Single/Multi Pack 1 1 080G3293
ERC 211 RED LED, 230 V, 1 sensor (NTC 10 kOhm at 25°C, L=1,5m), Single/Multi Pack 1 1 080G3263
ERC 213 RED LED, 230 V, Single/Multi Pack 3 1 080G3294
ERC 213 RED LED, 230 V, 2 sensors (NTC 10 kOhm at 25°C, L=1,5m), Single/Multi Pack 3 1 080G3265
ERC 214 RED LED, 230 V, Single/Multi Pack 4 1 080G3295

ERC 211 RED LED, 230 V, Industrial Pack 1 30 080G3288
ERC 213 RED LED, 230 V, Industrial Pack 3 30 080G3289
ERC 214 RED LED, 230 V, Industrial Pack 4 30 080G3296

Quick programming tools

EKA 183A Programming key for ERC 21X 1 080G9741

34 FR · ERC 21X user manual · DKRCC.ES.RL0.H8.02 · ©Danfoss

8.1| Sensors

Any of the below Danfoss sensors or equivalent.

Type Sensor element Sensor housing Cable Number Code no.

Thermo plastic polyester 8x30 1.5 m 150 084B4403

EKS 211

EKS 221

EKS 111 PTC 990 ohm / 25 °C

AKS 11 PT1000

AKS 12 PT1000

Note: all the mounted sensors must be of same type

NTC 5000 ohm / 25 °C
(Beta =3980 at 25/100 °C)

NTC 10000 ohm / 25 °C
(Beta =3435 at 25/85 °C)

Thermo plastic polyester 8x30 3.5 m 75 084B4404
Thermo plastic polyester 8x30 1.5 m 1 084N1220
Thermo plastic polyester 8x30 3.5 m 1 084N1221
Thermo plastic rubber 6x5x15 3.5 m 150 084N3206
Thermo plastic rubber 6x5x15 3.5 m 1 084N3210
Thermo plastic rubber 6x5x15 8.5 m 50 084N3208
Thermo plastic rubber 6x5x15 8.5 m 1 084N3209
Stainless steel 6x20 1.5 m 150 084N3200
Stainless steel 6x30 1.5 m 1 084N1178
Stainless steel 6x30 1.5 m 150 084N1161
Stainless steel 6x30 3.5 m 1 084N1179
Stainless steel 6x30 3.5 m 150 084N1163
Stainless steel 6x30 6 m 1 084N1180
Stainless steel 6x30 6 m 80 084N1173
Stainless steel 6x30 8.5 m 60 084N1168
Top part: PPO (Noryl)

Bottom: stainless steel
Top part: PPO (Noryl)

Bottom: stainless steel
Top part: PPO (Noryl)

Bottom: stainless steel
Stainless steel 6x40 1.5 m 1 084N0036
Stainless steel 6x40 1.5 m 30 084N0035
Stainless steel 6x40 3.5 m 30 084N0039
Stainless steel 6x40 5.5 m 30 084N0038

3.5 m 1 084N0003

5.5 m 1 084N0005

8.5 m 1 084N0008

35FR · ERC 21X user manual · DKRCC.ES.RL0.H8.02 · ©Danfoss

Simple temperature and defrost
management – countless functions
and benefits

ERC 21X is a smart multipurpose refrigeration controller designed to fulfill today’s requirements of commercial refrigeration
applications.

DKRCC.ES.RL0.H8.02 © Copyright Danfoss | Produced by ADAP-KOOL | 2018.10