Danfoss ERC 111A Electronic Refrigeration Controller
User Guide
Introduction
The Danfoss ERC 111A is an electronic refrigeration controller designed for temperature control in refrigeration appliances, suitable for front panel mounting. It features a latest-generation CPU, ample memory, and high-end electronic components, allowing for versatile software. The controller supports three separate password-protected user levels for parameter control, catering to various requirements.
Approvals: The ERC 111A is suitable for use with flammable refrigerants and has been tested according to EN/IEC 60335-2-24, annex CC and EN/IEC 60335-2-89, annex BB. It also complies with EN/IEC 60335-1 for glow wire, IEC/EN 60730, UL60730, NSF, CQC, EAC, and UA standards.
Password Protection: Access levels can be set per parameter using "KoolProg Software". There are three levels: Level 1 for shop access, Level 2 for technicians, and Level 3 for OEMs. Access levels cannot be set using the buttons. Users can alter passwords for levels they have access to, but not for higher levels.
Typical Applications
The ERC 111A is commonly used in:
- Glass Door Merchandisers
- Gastro Coolers
Glass Door Merchandiser: Features include outputs (DO1), inputs (S1, S2, di), and communication options. Ratings are specified for 100-240Vac, with red display and various approvals.
Gastro Cooler: Similar features to the merchandiser, with specific model numbers and approvals indicated.
Product Overview
Display: The ERC 111A features an LED display, available in red or blue, for displaying temperature and status. The upper left button can be configured as "Defrost", and the lower left button as "Stand by".
Buttons: Four buttons are integrated into the IP65 design for user interaction.
Clips: Used for rear mounting to secure the controller. Not used for front mounting.
Front Frame: For front mounting, the controller is placed in the designated hole, and the front frame is pressed into position, locking the controller.
Sensors: The controller supports temperature sensors for the cabinet (S1) and defrost (S2). The function of an input can be reprogrammed, but the connector cannot be moved. Sensors must be connected to their corresponding inputs (e.g., S1 to S1).
Quick Programming
Software for PC:
- KoolProg: Software from Danfoss for programming the ERC controller via a PC, offering easy parameter setting and programming. Available at Danfoss KoolProg.
- KoolKey (EKA200): A smart device acting as a gateway to connect the ERC controller to PC software "KoolProg" for fast programming. It can also be used as a programming key for transferring parameter settings.
- Mass Programming Key (EKA 201): A simple programming key for programming controllers on a production assembly line. It is a write-only device and requires KoolProg software.
- Bluetooth Adapter (EKA202 & EKA203): An external plug-in module enabling Bluetooth connectivity for the ERC controller, used with the "KoolConnect" mobile application.
Technical Specs
| Specification | Details |
|---|---|
| Power Supply | 100-240 V AC Switch mode power supply. Average 0.7 W |
| Inputs | 2 analogue (digital), user specific assignment for Air/evaporator/condenser |
| Purpose of Control | Control of commercial Refrigeration Applications |
| Construction | Electronic control for incorporation in Class I and Class II appliances |
| Automatic Action | Micro-disconnection on operation type 1.B |
| Output | DO1 (Compressor relay): 120 V AC: 16 A resistive, 16FLA/72LRA; 240 V AC: 10 A resistive, 10FLA/60LRA |
| Probes | Danfoss NTC sensors and Danfoss ERC accessories |
| Connectors | Modular connector system; RAST 5 Edge connectors |
| Programming | Danfoss KoolProg PC software and Programming key |
| Assembly | Front mounting; integrated solution |
| Display | LED display, 3 digit, decimal point, multi-functionality icons; °C/°F scale |
| Keypad | 4 buttons (integrated IP65 design) |
| 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: IP31 (connectors limit to IP00) |
| Environmental | Pollution degree II, non-condensing |
| Resistance to heat & fire | UL94-VO |
| EMC category | IEC/EN 61000-6-2, IEC/EN 61000-6-3 |
| Over voltage category | Category II (IEC 60664-1) |
| Operating Cycles | Compressor relay: > 100,000 at full load (16A(16A)) |
| Approvals | Flammable refrigerants (EN/IEC 60335-2-24, annex CC & EN/IEC 60335-2-89, annex BB), Glow wire (EN/IEC 60335-1), IEC/EN 60730, UL60730, NSF, CQC, EAC, Ukraine |
IMPORTANT NOTE: Inputs are not galvanic separated and are connected directly to the mains supply. Door-switches, sensors, and cables must fulfill reinforced insulation requirements.
Dimensions: Detailed dimensions for front and rear mounting are provided.
Connections
A wiring diagram illustrates the connections for the 100-240 V AC SMPS, compressor (DO1), and inputs (S1, S2, di) for cabinet temperature sensor, evaporator/condenser temperature sensor, and gateway/PC communication.
Code Numbers
A table lists various code numbers for the ERC 111A controller, temperature sensors, clips, programming tools, and accessories, including KoolKey, Mass Programming Key, and Bluetooth Adapters.
Operation
Programming Tools: The controller can be configured using KoolProg software with KoolKey as a Gateway, KoolKey as a Copy key, Mass Programming Key (MPK), or directly via the front panel buttons. These tools are supplied separately.
Manual Operation with Buttons (Direct Access):
- 1 Press (variable direct function): e.g., defrost, ON/OFF. Sub-function: "back" or "OK".
- 1 Press (temperature set point): Adjusts the set point using "up" or "down" buttons.
Examples:
- Changing the Desired Temperature Set point: Press "up/down" to access set point, adjust, and the display reverts to current temperature after 30 seconds.
- Acknowledging Alarms: Press any button to acknowledge flashing alarm messages.
- Password Protection: Access the menu by holding "up/down" for 5 seconds. The display shows "PAS". Use "OK" and "up/down" to enter the code. Passwords are set for three levels: shop, service, and OEM.
- Changing a Parameter: Access the menu, navigate to the desired parameter group and parameter using "up/down" and "OK", then adjust the setting.
NOTE: Incorrect parameter settings can lead to inadequate cooling, excessive energy consumption, and potential food hygiene breaches. Only trained operators should change parameters.
Menu/functions
Detailed descriptions of various menu functions and parameters are provided, categorized into:
- Thermostat settings: Set point ("tHE"), Current set point adjustment value ("SPr"), Thermostat differential ("diF"), Upper limit of thermostat set point ("HSE"), Lower limit of thermostat set point ("LSE").
- Pull Down settings ("Pud"): Pull Down Cycling ("PCy"), Pull Down Defrost Interval ("Pdi"), Pull Down Duration ("Pdd"), Pull Down Limit Temperature ("PLt").
- Defrost settings ("dEF"): Defrost Type ("dFt"), Adaptive defrost ("Add"), Terminate Temperature ("dtt"), Defrost reset temperature ("drt"), Defrost minimum Interval ("dii"), Maximum Interval ("dAi"), Minimum Time ("dit"), Maximum Time ("dAt"), Defrost ON Compressor Time ("dCt"), Defrost start evaporator temp ("dEt").
- Compressor settings ("CoP"): Voltage protection ("uPt"), Minimum cut-in voltage ("uLi"), Minimum cut-out voltage ("uLo"), Maximum voltage ("uHi").
- Sensor Error Type ("EHd"): Options include "no", "SEt", "Aut".
- Error Run Time ("Ert") and Error Stop Time ("ESt"): Parameters for safety mode operation in case of sensor failure.
- Minimum Stop Time ("CSt"), Minimum Run Time ("Crt"), Maximum OFF Time ("Cot"), Power ON Delay ("Pod"), Power ON Temperature ("Pot"): Various compressor operational timing and delay settings.
- Condenser Protection settings: Condenser Alarm Limit ("CAL"), Condenser Block Limit ("CbL"), Condenser OK Limit ("CoL"), Condenser Low Limit ("CLL"). These require a condenser temperature sensor.
- Display settings ("dis"): Display Intensity ("din"), Display Unit ("CFu"), Temp sensor to display ("trs"), Display Resolution ("RES"), Display Range Limit ("rLt"), Display Delay ("ddL"), Display Offset ("doF"), Lock Time After Defrost ("dLt"), Show Pull down state ("SSC"), Show Holiday ("SHo"), Show Defrost ("SdF"), Show compressor symbol ("SCS"), Show Defrost symbol ("Sds"), Info Menu Display Item ("idp").
- Alarm settings ("ALA"): High Temp Alarm ("HAt"), Low Temp Alarm ("LAt"), Alarm delay on high temperature alarm ("Htd"), Alarm delay on low temperature alarm ("Ltd"), Pull down delay ("Pdd"), Voltage alarm ("uAL"), Leakage alarm ("LEA").
Troubleshooting
A troubleshooting table is provided to address common issues such as the compressor not starting, defrost not starting, alarms not sounding, display alternations, and specific error messages like "dEF". It includes probable causes and recommended remedies.
Alarm Trigger Codes: Details on alarm trigger codes like "Hi", "Lo", "Con", "uHi", "uLi", "LEA", "E01", "E02" are provided with their corresponding outputs and comments.
Typical Applications
Glass Door Merchandiser, No-frost freezer/sub-zero cooler: A diagram shows the typical application with connections for the ERC 111A controller, compressor, and power supply. A table lists temperature sensor types and their corresponding code numbers and lengths.
Sensor Placement
Guidelines are provided for the correct placement of control sensors and condenser sensors to ensure optimal performance and protection of the compressor. This includes placement in vertical coolers with fans, vertical freezers with fans, coolers without fans, and for condenser sensors, placement on the liquid side of the condenser with attention to thermal conductivity and cable routing.
Application Matrix
An application matrix details the ERC 111A's compatibility with different types of refrigeration units (Standard beverage cooler, Out-door beverage cooler, CFF refrigerator, CFF freezer static evaporator), specifying the Type, Output (D01), and Input (S1, S2, Di) configurations. Notes emphasize selecting only one function per input and ensuring matching connectors.
