Danfoss ERC 111A Electronic Refrigeration Controller User Guide

: July 23, 2024
: Danfoss

Table of Contents

ERC 111A Electronic Refrigeration Controller
Product Information
Specifications
Product Overview
Installation
Programming
FAQ
How do I change the access levels on the ERC 111A?
What are the typical applications for the ERC 111A?
Where can I find more information about KoolKey (EKA 200)?
- Read User Manual Online (PDF format)
- Download This Manual (PDF format)

ERC 111A Electronic Refrigeration Controller

Product Information

Specifications

Model: ERC 111A
Application: Temperature control for refrigeration
appliances
Mounting: Front panel mounting
Features: Three separate password-protected user levels, over
100 programmable parameters, suitable for flammable
refrigerants

Product Overview

The ERC 111A is an electronic refrigeration controller with an
LED display designed for bottle coolers, commercial fridges, and
freezers. It offers easy installation, high quality, and
flexibility, making it ideal for OEM customers.

The display is available in red or blue color options, and the
controller can be customized with specific buttons for defrost and
standby functions.

Installation

Front Mounting:

Place the wired controller in the designated hole.
Press the front frame into position to secure the
controller.
The plastic lugs on the front frame lock the controller in
place.

Sensors:

S1: Temperature sensor for cabinet
S2: Temperature sensor for defrost
Control temperature sensor: Different lengths available
Defrost temperature sensor: Mount on the evaporator

Programming

Using KoolProg Software:

KoolProg Software from Danfoss allows programming of the
ERC-controller via a PC instead of using the front panel buttons.
The software can be downloaded from the Danfoss website.

FAQ

How do I change the access levels on the ERC 111A?

The access levels can be set separately for each parameter using
the KoolProg Software. There are three levels of access – shop
access, technician, and OEM. Passwords for each level can be
altered based on your access level.

What are the typical applications for the ERC 111A?

The ERC 111A is commonly used in glass door merchandisers and
gastro coolers.

Where can I find more information about KoolKey (EKA 200)?

KoolKey acts as a Gateway to connect the ERC controller to PC
software and allows for fast programming. More information can be
found on the Danfoss website.

User Guide
Electronic Refrigeration Controller ERC 111A
This reference manual is intended to be used primarily by OEMs for the purposes of programming ERC 111A. It may also be useful for technicians. It is not intended as a user guide for end users.
www.danfoss.com/erc

User Guide | ERC 111A Refrigeration Controller
Introduction

Application

Temperature control for refrigeration appliances. Front panel mounting.

Advantages

The latest generation CPU, plenty of memory and high-end electronic components allow for a uniquely versatile software. Three separate password-protected user levels can be used to control more than 100 different parameters to fit all individual requirements.

Approvals Password protected

Suitable to use with flammable refrigerants, tested in accordance to EN/IEC 60335-2-24, annex CC and EN/IEC 60335-2-89, annex BB Glow wire according to EN/IEC 60335-1 IEC/EN 60730 UL60730 NSF CQC EAC UA
The access level can be set separately for each parameter using “KoolProg Software”. There are three levels of access 1, 2, 3: – level 1 is for shop access; – level 2 for technicians; – level 3 for OEMs. The access levels cannot be set using the buttons. Passwords for the different levels can however be altered for the level of access you have, e.g. a level 2 user can change the password for level 1 and level 2 but not level 3.

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Typical application
Glass Door Merchandiser
Gastro cooler

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User Guide | ERC 111A Refrigeration Controller
Product overview
Display Buttons
Clips

The ERC 111A is an electronic refrigeration

controller with an LED display especially

^

developed for bottle coolers and commercial

^

fridges and freezers. It is particularly suited for

OEM customers where time, easy and reliable

installation and high quality need to go hand in

hand with flexibility.

The display can be ordered in red or blue.

The controller is available with the upper left

button as “Defrost”.

The lower left-button can be supplied with

“Stand by”.

Are used to secure the controller in place in the case of rear mounting. They are not used with front mounting. There are two identical clips, one placed on either side of the controller.

Front frame

Controller without front frame

Front frame

At front mounting place the wired controller in the hole. Then press the front frame in position. The plastic lugs locks hereby the controller.

“S1” Temperature sensor for cabinet
“S2” Temperature sensor for defrost

Control temperature sensor There are different lengths.
Defrost temperature sensor Should be mounted on the evaporator.

The function of an input can be reprogrammed, but the connector can not be moved. The connector is designed to only one location. “S1” to “S1”, “S2” to “S2″, etc.

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User Guide | ERC 111A Refrigeration Controller
Quick programming
Software for PC
KoolKey (EKA200)

KoolProg Software from Danfoss for programming the ERC-controller via a PC rather than with the front panel buttons.
https://www.danfoss.com/en/service-andsupport/downloads/dcs/koolprog/
KoolKey (EKA 200) KoolKey is a smart device that acts as a Gateway to connect ERC controller to PC software”KoolProg” as well as a Programming key for fast programming.
Refer to the KoolKey installation guide for detailed instructions.

Mass programming Key (EKA 201)
Bluetooth Adapter (EKA202 & EKA203)

KoolKey as a Gateway KoolKey in Gateway mode connects the ERC controller to PC to work online with PC software “KoolProg”.

Danfoss 80G8551

Standard Micro-USB cable
KoolKey

KoolKey

Interface cable

Controller
di
Interface cable

Danfoss 80G8552

KoolKey as a Programming key is used for transferring parameter settings files from the KoolKey to the controller and vice versa (bidirectional setting file transfer)

EKA 201

Controller Interface cable

Bluetooth Adapter Interface cable

di
Controller

Danfoss 80G8553

Danfoss 80G8554

Mass Programming Key (EKA 201) Mass Programming Key is a simple programming key for programming the controller in production assembly line. This is write only device and requires KoolProg software to load the setting file in to the device.
Refer to the EKA 201 installation guide for detailed instructions.
Bluetooth Adapter External plug in module that enables the bluetooth connectivity in ERC controller. to use “KoolConnect” mobile application
Refer to the EKA 202/203 installation guide for detailed instructions.

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User Guide | ERC 111A Refrigeration Controller

Technical specs

Power Supply

100 – 240 V AC Switch mode power supply. Average 0.7 W

Input

Inputs: 2 analogue (digital), user specific assignment · Air/evaporator/condenser

Purpose of Control

To control commercial Refrigeration Applications

Construction of Control Electronic control for incorporation for use in Class I and Class II appliance

Automatic Action

Micro-disconnection on operation type 1.B

Output

“DO1” (Compressor relay)

UL60730
120 V AC: 16 A resistive, 16FLA/72LRA 240 V AC: 10 A resistive, 10FLA/60LRA

EN60730 16(16) A

Probes

Danfoss NTC sensors and Danfoss ERC accessories

Connectors

Modular connector system for OEM customers, with optional output screw terminal adapter; Input connector type: Rast2 5 Edge connectors; output connector type: RAST 5 standard

Programming

Programming with Danfoss KoolProg PC software and Programming key

Assembly

Front mounting; brackets; fully integrated solution (requires OEM specific design of mounting hole)

Display

LED display, 3 digit, decimal point and multi functionality icons; °C/°F scale

Keypad

4 buttons (integrated IP65 design), 2 left, 2 right; user programmable

Operating Conditions 0 55 °C, 93% RH, non-condensing

Storage Conditions

-40 +85 °C, 93% RH

Range of Measurement -40 +85 °C

Ingress Protection

Front: IP65 Rear: water and dust protection corresponds to IP31, accessibility of connectors limit rear part rating to IP00

Environmental

Pollution degree II, non-condensing

Resistance to heat & fire UL94-V0

EMC category

IEC/EN 61000-6-2, IEC/EN 61000-6-3

Over voltage category Category II (IEC 60664-1)

Operating Cycles

Compressor relay: more than 100,000 at full load (16A(16A))

Approvals

Suitable to use with flammable refrigerants, tested in These approvals are only valid when using the accessories listed in accordance to EN/IEC 60335-2-24, annex CC and EN/IEC this document 60335-2-89, annex BB. Glow wire according to EN/IEC 60335-1 IEC/EN 60730 UL60730 NSF CQC EAC Ukraine

IMPORTANT NOTE
The inputs are not galvanic separated and are connected directly to the mains supply! For that reason, door-switches, sensors as well as the cables must fulfil the reinforced insulation requirements.

Dimensions

^ ^ 36,5 mm
78,25 mm

47,25 mm 51,25 mm

28 mm

28,5 mm

71 mm

Front mounting (Lock with frame)

30 mm

71 mm

Rear mounting (Lock with clips)

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Compressor Cabinet temp. sensor Evaporator or condenser temp. sensor

User Guide | ERC 111A Refrigeration Controller

Connections

100 240 V AC SMPS

L

N

1

2

3

DO’s

DO1

ERC111A Controller

AI/DI’s S1

S2

di

Gateway
Optional PC communication

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User Guide | ERC 111A Refrigeration Controller

Code numbers

Type

I-Pack

Qty. Code no.

ERC 111A, Red LED, GDM without buzzer

27 080G3230

ERC 111A, Blue LED, GDM without buzzer

27

080G3231

ERC 111A, Red LED, CFF with buzzer

27 080G3235

ERC 111A, Blue LED, CFF with buzzer

27 080G3236

Version with buzzer is available only on demand

Temperature sensors

-40 85 °C, PVC Standard, NTC 5 K

S1, 470 mm, 3-pole

120 077F8751

S1, 1000 mm, 3-pole

120 077F8757

S1, 1500 mm, 3-pole

120 077F8761

S1, 2000 mm, 3-pole

120 077F8765

S1, 2200 mm, 3-pole

120 077F8767

S1, 3000 mm, 3-pole

60 077F8769

S1, 3500 mm, 3-pole

60 077F8723

S1, 6000 mm, 3-pole

27 080G2019

-40 120 °C, TPE precision NTC 5 K, Santroprene

S1, 1500 mm, 3-pole

120 077F8726

S1, 2000 mm, 3-pole

077F8727

S1, 3000 mm, 3-pole

077F8729

-20 175 °C, Silicone rubber cable, NTC 100 K

S1/S3, 1000 mm, 3-pole

080G2041

S1/S3, 2000 mm, 3-pole

108 080G2043

S1/S3, 3000 mm, 3-pole

080G2045

-40 85 °C, PVC Standard, NTC 5 K

S2, 1000 mm, 2-pole

120 077F8786

S2, 1500 mm, 2-pole

120 077F8790

S2, 2000 mm, 2-pole

120 077F8794

S2, 3000 mm, 2-pole

60 077F8798

S2, 6000 mm, 2-pole

27 080G2029

Type
Clips Black (2 needed per controller)

I-Pack Qty. Code no.
080G3308

Programming tools and other accessories

KoolKey (EKA 200)

1 080N0020

Mass Programming Key (EKA 201) 1 080N0021

BLE Adapter without RTC power backup (EKA 202)

1 080N0022

BLE Adapter without RTC power backup (EKA 202), I pack

54 080N0026

BLE Adapter with RTC power backup (EKA 203)

1 080N0023

BLE Adapter with RTC power backup (EKA 203), I pack

54 080N0027

Interface cable, ERC11x (to connect 1 080N0328 with EKA 200 and EKA 201)

Interface cable, ERC11x (to connect 1 080N0329 with EKA 202 and EKA 203)

Interface cable to connect EKA 201 1 080N0324 in gateway mode

Power Plug*

3-pole with screw

080G3356

*available optional plugs with screw connection are limited to 16A

Note: For more information about temperature sensor types and connectors, please refer to Danfoss’ technical brochure “NTC type temperature sensors for ETC & ERC controllers”.

Sx (di)= connector position. Inputs are configurable.
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User Guide | ERC 111A Refrigeration Controller

Operation
Programming tools

The controller can be configured in four ways: · KoolProg software using KoolKey as a Gateway · KoolKey as Copy key · Mass programming Key (MPK) · Buttons on the front panel of the controller
All these tools are supplied separately. For technical literature and further information, please contact your local Danfoss representative.

Manual operation with buttons (Direct Access)

1 Press: variable direct function, e.g. defrost Sub function: “back”
1 Press: variable direct function, e.g. ON/OFF Sub function: “OK”

1 Press: temperature set point Sub function: “up”
^ ^
1 Press: temperature set point Sub function: “down”

Examples

Changing the Desired Temperature Set point: 1. The display shows the current temperature. 2. Press “up/down” to access set point. 3. Press “up/down” to adjust set point.
After 30 seconds, the display automatically reverts to showing the current temperature
Acknowledging Alarms: 1. Display Flashing the alarm message. 2. Press any button to acknowlege.
Password protection: 1. Press “up/down” and hold 5 seconds to access the menu. 2. The display shows “PAS”. 3. Press “OK”. 4. Press “Up/Down” to the code. 5. Press “OK”.
Password protection on three levels: 1. Level 1: “shop” (daily use by shop personnel). 2. Level 2: “ser” (service technician). 3. Level 3: “OEM” (OEM programming).

Changing a Parameter Some parameters may be hidden to you. When scrolling through menus, the parameters available will have been pre-determined using “KoolProg Software”. Your access level will determine which parameters you can view and edit:
1. Press “up/down” and hold 5 seconds to access the menu. 2. First parameter group is shown “tHE”. 3. Press “up/down” to find the desired group. 4. Press “OK”. 5. First parameter is shown. 6. Press “up/down” to find the desired parameter. 7. Press “OK”. 8. Press “up/down” to find the desired setting. 9. Press “OK”.
After 30 seconds, the display automatically reverts to showing the current temperature. Or Press 2 x “Back”.

NOTE: Incorrect parameter settings can lead to inadequate cooling, excessive energy consumption, unnecessary alarms and in the case of temperature- sensitive food storage, breaches in food hygiene principles and regulations. Only a trained operator should make changes to parameters.

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User Guide | ERC 111A Refrigeration Controller
Menu/functions

ERC menu code Description

“tHE

“SEt”

Min. -100.0°C Max. 200.0°C Default 2.0°C

“SPr”
Min. 0.0 Max. 1.0 Default 0.5

“diF”
Min. 0.0 K Max. 20.0 K Default 2.0 K

Thermostat settings
Set point This parameter defines the desired cabinet air temperature (set point) In standard operation the set point is changed by simply pressing the “temperature up/down” buttons on ERC 111A; for laboratory and assembly line you may opt for software controlled set point configuration
Current set point adjustment value diF * SPr The default value is set to 0.5 and the parameter is hidden by default. “Spr” defines the position of the set point in relation to cut-in and cut-out “Spr=0,5” sets the set point mid between cut-in and cut-out. “Spr=0” sets the set point at the cutout. “Spr=1” sets the set point at cut-in
Thermostat differential This defines the difference between the cut-out and the cut-in The desired temperature is determined by “SPr” and “diF”

“HSE”
Min. -100.0°C Max. 200.0°C Default 50.0°C

Upper limit of thermostat set point Define the temperature range limit of the controller Once set, the desired temperatue (set point) can not go above “HSE”

“LSE”
Min. -100.0°C Max. 200°C Default -35.0°C

Lower limit of thermostat set point Define the temperature range limit of the controller Once set, the desired temperatue (set point) can not go below “LSE”

“iCi”
Min. no Max. yes Default no

Initial cut in Comp relay action when Tair is between cut-in and cut-out at power-up: “yES”: cut in the compressor “no”: cut out the compressor

Pud

Pull Down settings

Pull down (sometimes known as Super Cool) is a procedure for improving cooling performance, accelerating the time used to reach the desired temperature. Pull down settings overrule all other settings.

“PCy”
Min. 0 min Max. 360 min Default 30 min

Pull Down Cycling This is the duration in minutes of the compressor cycling at the reduced set point temperature. Once the desired pull down limit temperature “PLt” has been reached during pull down, the compressor will continue to cycle ON/OFF for the duration of “PCy”. At the end of the period defined by “PCy”, the set point temperature will return to normal and pull down will cease.

“Pdi”
Min. 0 hour Max. 48 hour Default 15 hour

Pull Down Defrost Interval Even though most applications do not need Defrost during pull down, an extended defrost during pull down can be applied. This is the time between defrost cycles during pull down. It is measured in hours and can be up to 48 hours. During pull down, this setting overrides the defrost interval and defrost time settings (see the defrost section).

“Pdd”
Min. 0 hour Max. 48 hour Default 24 hour

Pull Down Duration You can choose to limit the maximum pull down time. Once this time value (max. 48 hours) is reached, pull down will stop regardless of whether the desired pull-down temperature has been reached.

“PLt”
Min. -55.0°C Max. 55.0°C Default 0.0°C

Pull Down Limit Temperature This parameter sets the cut out temperature during pull-down. In order to protect valuable contents you must always specify this parameter value greater than or equal to the absolute minimum temperature allowed in your application. For glass door merchandisers 0 °C / 32 °F protects bottles from freezing; for commercial fridges you may opt for a slightly higher temperature (e.g. 2 °C)

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dEF “dFt”
Default no

Defrost settings
Defrost Type “no”: defrost function is disabled. “nat”: OFF-cycle defrost (natural defrost).

“Add”
Min. no Max. yes Default no

Adaptive defrost “no”: defrost controlled by time. “yES”: automatic defrost control activated.

“dtt”
Min. 0.0°C Max. 25.0°C Default 6.0°C

Terminate 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 if no evaporator sensor is used.

“drt”
Min. 0.0°C Max. 200.0°C Default 5.0°C

Defrost reset temperature The defrost counter is saved and restored at power- up, but if the temperature sensor, used for defrost, is higher than this value at power-up, it is assumed that the evaporator is free of ice and the defrost counter will be cleared.

“dii” Defrost minimum Interval/dii

ON

Min. 1 hour Max. 96 hour

Defines the minimum time period between the start of two defrost cycles. DEFROST CYCLE Once the minimum interval has expired, the defrost cycle will start at

Default 6 hour the following cut-out or once the maximum interval “dAi” has been

reached.

“dAi”
Min. 1 hour Max. 96 hour Default 7 hour

Maximum Interval Defines the maximum time period between the start of two defrost cycles.

“dit”
Min. 0 min Max. 240 min Default 5 min

Minimum Time Defines the minimum duration of a defrost cycle. During this period, the controller will not check the temperature. Once the minimum time has expired, the temperature will be checked and if the terminate temperature “dtt” has been reached, the defrost cycle will end. If dtt has not been reached, defrost will continue until either dtt is reached or the maximum time “dAt” reached, whichever occurs first.

“dAt”
Min. 0 min Max. 480 min Default 30 min

Maximum Time Defines the maximum duration of a defrost cycle. The controller will not allow a maximum time to be entered which is less than the minimum time, or a minimum time which is more than the maximum time.

“dCt”
Min. no Max. yes Default no

Defrost ON Compressor Time If this parameter is set to “yES”, then defrost cycles are based on the total time the compressor has been running. If this parameter is set to no, then defrost cycles are related to elapsed time, regardless of how long and how often the compressor has been on.

“doC”
Min. 0 hour Max. 24 hour Default 0 hour

Defrost by Comp. running time Continuous compressor running can cause defrost. “0” = deactived

“dEt”
Min. -50.0°C Max. 0.0°C Default -50.0°C

Defrost start evaporator temp Defrost start trigger for adaptive defrost.

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“ddt”
Min. 0.0 K Max. 30.0 K Default 5.0 K

Defrost t Defrost t compare with evaporator temperature of first cut out after defrost to trigger defrost start. The defrost start if evaporator temperature has decreased more than “ddt”

“idi”
Min. 0 hour Max. 96 hour Default 3 hour

Initial Defrost Interval The initial defrost interval determines the time for first defrost after power-up. The initial defrost is mainly intended for factory testing of the defrost functionality and can be set to expire after a number compressor cycles according to the setting of parameter idd. During normal operation, the defrost counter will be saved in memory and restored after power loss, making the initial defrost unnecessary.

“idd”
Min. 0 Max. 999 Default 100

Initial Defrost Duration The initial defrost duration is the number of compressor cycles before the initial defrost is deactivated. “0”: “idi” No initial defrost. “1-998”: number of compressor cycles before deactivation. “999”: initial defrost always active.

CoP

Compressor settings

“uPt”
Min. no Max. yes Default no
“uLi”
Min. 0 V AC Max. 270 V AC Default 0 V
“uLo”
Min. 0 V AC Max. 270 V AC Default 0 V
“uHi”
Min. 0 V AC Max. 270 V AC Default 270 V
“EHd”
Default no

Voltage protection “no”: no voltage protection. “yES”: voltage protection activated based on voltage related settings.
Minimum cut-in voltage/uLi. Minimum cut-out voltage/uLo. Maximum voltage/uHi These three parameters provide voltage protection to the compressor. Start by setting “uHi”, followed by “uLo” and “uLi”. “uLi”: 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. “uLo”: when the compressor is running, it will be switched OFF if the voltage goes below that given in this parameter. “uHi”: 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.
Sensor Error Type “no”: no sensor error handling. “SEt”: in case of control sensor error, follow error run/stop time. “Aut”: automatical sensor error handling.

“Ert”
Min. 0 min Max. 60 min Default 0 min
“ESt”
Min. 0 min Max. 60 min Default 1 min

Error Run Time The parameter only become active in the unlikely event of a broken temperature sensor. It is used to run the application in safety mode. At the same time the sensor error will be shown in the display. “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.
Error Stop Time The parameter only become active in the unlikely event of a broken temperature sensor. It is used to run the application in safety mode. At the same time the sensor error will be shown in the display. “ESt” define the duration the compressor will be “idle”.

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“CSt”
Min. 0 min Max. 30 min Default 2 min

Minimum Stop Time It determines the minimum number of minutes the compressor must remain idle before a Temperature cut-in can take effect. For example, 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”
Min. 0 min Max. 30 min Default 0 min

Minimum Run Time It determines the minimum number of minutes the compressor must run before a Temperature cut-out can take effect. For example, if the 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”
Min. 0 min Max. 480 min Default 0 min

Maximum OFF Time This is the maximum time in minutes the compressor is allowed to “idle” up to 480 minutes. Cot is set to zero by default (inactive). If the controller is used on a draft beer (ice bank) application, this parameter can be used to control the ice thickness.

“Pod”
Min. 0 s Max. 300 s Default 300 s

Power ON Delay This is the delay in seconds between power-on and the compressor being activated. Depends on the power ON temperature setting.

“Pot”
Min. -100.0°C Max. 200.0°C Default -100.0°C

Power ON Temperature This parameter is used to accelerate the first application test on the OEM assembly line; if the cabinet temperature is higher than this parameter the power ON Delay is overruled and the outputs are activated without delay.

Con

Condenser Protection settings

NOTE: A condensor temperature sensor is required to use these parameters. Condenser protection is generally used in dusty environments where the condenser may accumulate a layer of dust or dirt and therefore be at risk of overheating.

“CAL”
Min. 0°C Max. 200°C Default 80°C

Condenser Alarm Limit/CAL This parameter sets the temperature for the condenser at which an alarm will be generated.

“CbL”
Min. 0°C Max. 200°C Default 85°C
“CoL”
Min. 0°C Max. 200°C Default 60°C
“CLL”
Min. -100°C Max. 20°C Default -5°C

Condenser Block Limit/CbL This parameter sets the temperature which if reached will cause the compressor to switch OFF.
Condenser OK Limit/CoL This parameter sets the temperature at which the compressor is allowed to start again after the temperature set in “CbL” above has been exceeded and the compressor stopped.
Condenser Low Limit/CLL This parameter sets the lowest (condenser) temperature at which the compressor is allowed to start.

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diS

Display settings

NOTE: some display parameters can be set in such as way that they may be illegal in some jurisdictions. Please check local legislation.

“din”
Min. 2 Max. 10 Default 10

Display Intensity The controller can have its display intensity (brightness) set in one of two ways: A) With a Danfoss ambient light sensor attached, the brightness of the
display is adjusted automatically according to the ambient light level (see the assignments section). B) When no ambient light sensor is attached, the display intensity can be set to a fixed intensity. Both options are on a scale of 1 to 10, where 10 is the brightest.

“CFu”
Min. °C Max. °F Default °C

Display Unit This parameter sets the display to Fahrenheit or Celsius. Switching from one to the other will cause all temperature settings to be automatically updated accordingly.

“trS”
Default SCo

Temp sensor to display “SCo”: temperature control. “EuA”: evaporator temperture. “Con”: condenser temperature (condenser cleaning). “AuS”: only for showing on display.

“rES”
Min. 0.1 Max. 1 Default 0.1

Display Resolution This parameter can be set to 0.1, 0.5 or 1 and affects the way the temperature is displayed. With the parameter set to 1, the display will only ever show temperatures rounded to the nearest whole degree. At 0.5, it will round the temperature to the nearest half degree for display. For example, 3.3 degrees will be shown in the display as 3.5 degrees and 3.9 as 4.0. With the parameter set to 0.1, no rounding occurs. This parameter does not affect the temperature itself, merely the display.

“rLt”
Min. no Max. yes Default no

Display Range Limit In some point of sales applications you may want to show the desired instead of the real temperature. This parameter sets whether the displayed temperature is the actual temperature or whether it is restricted to the cut-in / cut-out limits. Set to “nO” means that the actual temperature will de displayed. The parameter is set to “nO” by default.

“ddL”
Min. 0 s Max. 10 min Default 0 min

Display Delay In order to provide a realistic temperature appearance for an application, a display delay can be set. The parameter sets the time constant (tau) of the moving average filter for the display. Physically, one time constant represents the time it takes the system’s step-response to reach 66% of its final value and five time-constants the time it takes to reach 99% of its final value.

“doF”
Min. -10.0 K Max. 10.0 K Default 0.0 K
“dLt”
Min. 0 min Max. 60 min Default 15 min
“SSC”
Min. no Max. yes Default no

Display Offset This parameter is a relative value and allows the temperature displayed to be different to the temperature measured. For instance, at a measured temperature of 7°C and “doF” set to -2K, the displayed temperature will be 5°C instead.
Lock Time After Defrost In order not to show a rising temperature during defrosting, the displayed temperature is locked at the temperature shown at the start of the defrost cycle for the number of minutes set in this parameter. “0”: no lock.
Show Pull down state If set to “yES”, this parameter causes the display to show SC when the system is in pull down mode. If set to “nO”, the temperature continues to be displayed.

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“SHo”
Min. no Max. yes Default no
“SdF”
Min. no Max. yes Default yes

Show Holiday “no”: display will show temperature or ECO mode during holiday mode. “yES”: display will show “HoL” during holiday mode.
Show Defrost If set to “yES”, this parameter causes the display to show DEF when the system is in defrost mode. If set to “nO”, the temperature continues to be displayed.

“SCS”

Min. no Max. yes Default yes
“SdS”

Min. no Max. yes Default yes
“idp”

ALA

Min. 0 Max. 15 Default 15

Show compressor symbol “no”: compressor symbol will not show on display. “yES”: show compressor symbol on display.
Show Defrost symbol “no”: defrost symbol will not show on display. “yES”: show defrost symbol on display.
Info Menu Display Item Switch of display items in Info menu. Visible on “KoolProg Software” ONLY. Data structure: 0,0,0,0, (alarm item), (average item), (low temp), (high temp)”.
Alarm settings

“HAt”
Min. -100.0°C Max. 200°C Default 15.0°C

High Temp Alarm Absolute value. By setting “HAt” to the maximum alarms will be deactivated.

“LAt”
Min. -100.0°C Max. 200°C Default -50.0°C
“Htd”
Min. 0 min Max. 240 min Default 30 min

Low Temp Alarm Absolute value. By setting “LAt” to the minimum value, alarms will be deactivated. In most situations, the low alarm delay will be set to 0 to warn about too low a temperature immediately.
Alarm delay on high temperature alarm The number of minutes to wait before sounding an alarm once the high temperature alarm temperature is reached.

“Ltd”
Min. 0 min Max. 240 min Default 0 min

Alarm delay on low temperature alarm The number of minutes to wait before sounding an alarm once the low temperature alarm temperature is reached.

“Pdd”
Min. 0 min Max. 960 min Default 240 min

Pull down delay Normally, it is not necessary or desirable to sound an alarm during a pull down (the initial phase of reaching the desired temperature). This parameter prevents the high temperature alarm “HAt” sounding during pull down and after a defrost for the number of minutes set for the parameter. NOTE: it does not apply to the low temperature alarm “LAt”.

“uAL”
Min. no Max. yes Default no

Voltage alarm “no”: no voltage alarm. “yES”: voltage alarm activated.

“LEA”
Min. 0 hour Max. 96 hour Default 0 hour

Leakage alarm Leakage detection for compressor protection. “0”: disable

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“Abd”
Min. 0 min Max. 999 min Default 0 min

Alarm Buzzer Duration The alarm sounds for 10 seconds, followed by silence for 50 seconds. One alarm sequence therefore lasts 60 seconds. These values cannot be changed. This parameter determines how long in minutes an audible alarm will continue while there is still a reason to have an alarm. If set to 999, the alarm will continue to sound until the reason for the alarm is cleared for example the temperature has dropped enough or the door closed. In some cases, it may be necessary for a user or technician to take action in order to clear the alarm. If set to 0, the alarm will never sound.

“ACA”
Min. no Max. yes Default yes

Auto Clear of Alarm/Error/ACA If this parameter is set to “nO”: The alarm status will not disappear automatically even if the condition which caused the alarm is no longer valid or present. If set to “yES”: As soon as the condition which caused the alarm is no longer valid or present, the alarm status will automatically change back to inactive. There will be no trace of the alarm having occurred. In general, glass door merchandise applications will be set to “yES” and commercial fridges and freezers set to “nO”. For example, if the temperature goes too high for a period there may be food safety considerations in a freezer containing food but not in a fridge with cold drinks.

ECS

ECO strategy

“tto”
Min. 0 hour Max. 168 hour Default 0 hour

Time to pull down Time which ERC stay in holiday mode to decide to enter pull down or serving mode.

ECA

ECO management

“Hto”
Min. -25.0 K Max. 25.0 K Default 6.0 K

Holiday Temperature Offset Increase or decrease of temperature with respect to normal mode during holiday mode.

ASi

Assignments settings

“uSA”
Min. no Max. yes Default no

MODBUS Safety “on”: MODBUS auto detection is enabled. “yES”: MODBUS communication is deactivaed.

“t1A”
Min. -20.0 K Max. 20.0 K Default 0.0 K
“t2A”

Air Temperature Adjustment (applies to non-Danfoss temperature sensors only) This parameter is a relative value and allows adjustment of the control sensor temperature. For instance, at a measured temperature of 7C and “tAd” set to -2 K, the input from the control sensor will be 5C instead.

Inputs and outputs are configurable There are two steps: 1. Define the type of sensor attached to the input:
– temperature: light/digital. 2. Define the application for the sensor:
– temperature: control/condenser/evaporator. – light: ECO/display/both. – motion – digital: door sensor. Please contact your local Danfoss representative for information about default settings.

NOTE: coded sensors will impact on the number of possible configurations. For instance: Danfoss supplies only 2-pole defrost sensors, so input “S3” will most likely be used as a defrost/evaporator temperature sensor input.

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“S1C”
Default Stn
“S2C”
Default Stn
“S1A”
Default SCo
“S2A”
Default nC
“o1C”
Default CoP
“b1C”
Default noP
“b1L”
Default PoF
“b2C”
Default dEF
“b2L”
Default inF
“b3C”
Default tP
“b3L”
Default ECo
“b4C”
Default tn
“b4L”
Default Lig
“PS1”
Min. 0 Max. 999 Default 0
“PS2”
Min. 0 Max. 999 Default 0
“PS3”
Min. 0 Max. 999 Default 0

S1 Config/S1C S2 Config/S2C Available options are: “Stn”: for a standard temperature sensor NTC 5 K @ 25°C and TPE precision. “Htn”: for a high temperature sensor NTC 100 K @ 25°C.

S1 Application/S1A S2 Application/S2A Available options are: “nC”: not connected. “SCo”: temperature control. “EuA”: evaporator temperature. “Con”: condenser temperature (Condenser cleaning). “AuS”: only for showing temperature on display.

D01 Config “CoP”: direct compressor control. “PiC”: pilot Relay (no zero cross) if using pilot relay to control a
compressor, this option must be used instead of “CoP”. “HEt”: heating application, inverse output. “PiH”: pilot heat relay (no zero cross).

Lower left button: Button 1 Config (short press)/b1C Button 1 Config (long press)/b1L
Upper left button: Button 2 Config (short press)/b2C Button 2 Config (long press)/b2L
Upper right button: Button 3 Config (short press)/b3C Button 3 config (long press)/b3L
Lower right button: Button 4 Config (short press)/b4C Button 4 Config (long press)/b4L

The buttons can be programmed as follows:

Short press function

Long press function

“noP”: not operating “tP”: increase set point “tn”: decrease set point “dEF”: toggle defrost “SuP”: toggle super-cool/pull down “diP” : increase display intensity “din” : decrease display intensity “CFA”: toggle °C and °F

“noP”: not operating “tP”: increase set point “tn”: decrease set point “dEF”: toggle defrost “SuP”: toggle super-cool/pull down “diP”: increase display intensity “din”: decrease display intensity “CFA”: toggle °C and °F “PoF”: ERC power ON/OFF “HoL”: enter holiday mode “inF”: enter info menu

NOTE: Your assignments may not be shown on the printed buttons. We advice to use this functionality together with the fully integrated mounting model only.

2

3

1

4

Password level 1 / PS1 Password Level 2 / PS2 Password Level 3 / PS3 These assign passwords to the three levels of access. The password is a three-digit number. Access levels are Shop, Service and OEM. You may not therefore have access to change all the passwords. Passwords are entered by using the up and down arrow buttons. Danfoss advises against using passwords which are easy to remember or enter, for example 111, 222, 123 etc.
NOTE: When accessing the controller with 3 wrong password in a sequence ERC will automatically block access for 15 minutes.

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User Guide | ERC 111A Refrigeration Controller

Ser

Service information settings

The parameters in the following section are READ ONLY and cannot be changed by the user. They provide information for technicians and OEM users.

“ACt”

NOTE: the only parameters that can be configured are: “oEL”, “oEn”, “oEH”. These parameters allow OEMs to enter their own product code.
Accumulated Comp. run time

“AEt” Accumulated ERC up time

“uAC” “ouS” “rL1” “int” “dnt” “Snu” “Fir” “HAr” “onL” “onH” “oEL”

Voltage value Current main power supply voltage.
DOs Status Current relay open closed status.
Relay 1 counter Thousands of cycles of compressor relay since manufacture.
Interval Counter Compressor run time since last defrost.
Defrost time counter Duration of last defrost cycle [min].
Serial number Serial number given at manufacturing.
SW version Danfoss software version number.
HW version Danfoss hardware version number.
OrderNoLow Danfoss order code number.
OrderNoHigh Danfoss order code number.
OEM code Low

“oEn” OEM code Middle

“oEH” OEM code High

“PAr” “CHd” “SFC” “Ctt” “Et1” “AuS” “att”

Parameter version OEM parameter version number [requires EKA copy key update].
Manufacturing date Programme date WWY: week number and year number (2010-19).
Set as Default Resets all parameters to last good OEM settings.
Condenser Temp Temperature of the condensor sensor.
Evaporator1 Temp Temperature of the evaporator sensor1.
AUX Temp. Temperature of the AUX sensor. invisible.
Raw Sair Temp

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“unP”

Display messages Device is unprogrammed (relay output is lockt)

“Prg” Device has not finished programming (relay output is lockt)

“SC” Device is in pull-down mode (super-chill) “dEF” Device is defrosting

Troubleshooting
Problem Compressor does not start
Defrost does not start
Alarm does not sound
Display alternates between condenser and temperature Display alternates between high and temperature Display alternates between low and temperature Display shows “dEf”

Probable cause Waiting for compressor delay timer Defrost in progress Line voltage to compressor too low or too high Controller in pull down mode
Alarm delayed
Condenser too hot
Temperature too high
Temperature too low
Defrost in progress

Remedy Check CoP->CSt Check CoP ->Pot /Pod Check dEF ->dit, dot Check CoP->uLi, uLo, uHi Defrost might be delayed during pull down Check parameter Pud->Pdi Check ALA->Htd, Abd Check Pud->Pdd Clean condenser Check Con ->CAL, CbL Check ALA->HAt
Check ALA -> LAt
Check diS ->SdF

Alarm code “Hi” “Lo” “Con” “uHi” “uLi” “LEA”
“E01”

Trigger

Automatic clearance

Air temperature is higher than User configured “ALA->Hat” for “ALA->Htd”

Air temperature is lower than User configured “LAt” for “Ltd”

Condenser temperature is too User configured high or too low

Line voltage is higher than “Cop->uHi”

Always

Line voltage is lower than “Cop->uLi”

Always

Compressor continuous running for more than “ALA->LEA”

Always

“S1” error

Always

Outputs
Blink “Hi” with the highest temperature; If configured: cut in alarm relay, beep the buzzer Blink “Lo” with the lowest temperature. If configured: cut in alarm relay, beep the buzzer Blink “Con”. If configured: cut in alarm relay, beep the buzzer
Blink “uHi”. If configured: cut in alarm relay, beep the buzzer
Blink “uLo”. If configured: cut in alarm relay, beep the buzzer.
Blink “LEA”. If configured: cut in alarm relay, beep the buzzer
Blink “E01”. If configured: cut in alarm relay, beep the buzzer

“E02” “S2” error

Always

Blink “E02”. If configured: cut in alarm relay, beep the buzzer

Comments High temperature alarm Low temperature alarm Condenser alarm High voltage alarm Low voltage alarm Leakage alarm
“S1” sensor failure (short or open) “S2” sensor failure (short or open)

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User Guide | ERC 111A Refrigeration Controller
Typical applications Glass Door Merchandiser, No-frost freezer/sub-zero cooler

ERC 111A ERC 111A, Red LED, without buzzer ERC 111A, Blue LED, without buzzer

080G3230 080G3231

Temperature Sensor for Cabinet Temperature Sensor for

Temperature Control

Condenser Temperature Control

PVC Standard Connector type 3-pole

470 mm
1000 mm 1500 mm 2000 mm 2200 mm 3000 mm 3500 mm 6000 mm

077F8751
077F8757 077F8761 077F8765 077F8767 077F8769 077F8723 077F2019

PVC Standard Connector type 2-pole

1000 mm
1500 mm 2000 mm 3000 mm 6000 mm

077F8786
077F8790 077F8794 077F8798 077F2029

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Sensor placement Control sensor Control sensor
Condenser sensor

The control sensor must always be connected and is used for controlling the cut-in and cut-out of the compressor according to the set point. The sensor is also used for the displayed temperature.
Vertical coolers with fan Most common placement is in the return air to the evaporator. The sensor can be placed close to the fan even when the fan is pulsed during compressor OFF periods: the updating of the temperature is blocked when the fan is stopped and only updated when the fan has been running for a while, so that the heat from the fan does not affect the temperature reading. For applications sensitive to sub-zero temperatures, sensor placement in the evaporator outlet air can be considered.
Vertical freezers with fan Placement in the return air or in the freezer compartment.
Coolers without fan The best results are normally obtained when the sensor is placed at the side-wall, 10 cm from the back and approximately at 1/3 from the bottom or where the evaporator ends. The control sensor must always be connected and is used for controlling the cut-in and cut-out of the compressor according to the set point. The sensor is also used for the displayed temperature.
The condenser sensor is used to protect the compressor against high pressure when the condenser is blocked or the condenser fan fails.
Placement of sensor Place the sensor at the liquid side of the condenser. Use a metal bracket or metal tape to ensure good thermal conductivity. Be sure that the cable does not pass hot spots at the compressor or condenser that exceeds 80°C.

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Application Matrix

ERC 111A

Application

Type

Standard beverage cooler ERC 111A

Out-door beverage cooler ERC 111A

CFF refrigerator

ERC 111A

CFF freezer static evaporator ERC 111A

Output DO1 Comp Comp Comp Comp

Input S1 Control Control Control Control

S2

Di

Defrost or condenser –

Condenser

–

NOTE: · Select only one function per input, e.g. defrost or condenser sensor. · Make sure that the accessory you select has a matching connector to the input, e.g. a sensor for input “S2” must have “S2” connector. · Condenser sensor are optional and can be omitted.

ADAP-KOOL®

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