Danfoss ERC 101 Controller
MAKING MODERN LIVING POSSIBLE
Technical Highlights
- Pre-programmed - ready to use
- Compressor protection against unstable voltage
- High condensing temperature protection
- Compact design - total depth is only 46 mm
- Real 16A power relay - up to 2.5 HP compressors
- Automatically controlled brightness of large-size LED display
- Fully compatible with flammable refrigerants (R290)
- Moisture protection (housing & coating)
- Advanced defrost algorithms
Technical Specifications
| FEATURES | DESCRIPTION |
|---|---|
| Power supply | 100 VAC - 240 VAC 50-60 Hertz, automatic switch mode power supply |
| Rated power | Less than 0.5 W |
| 2 analogue inputs | Danfoss NTC Air temperature probes, Danfoss NTC Condenser temperature probes (optional) |
| Output compressor relay | 16 (16A) EN60730; 16 (16A) CQC; 16A (16A FLA/72A LRA) UL60730 |
| Display | LED display, 3 digits, decimal point and multi-functionality icons, °C scale |
| Operating conditions | 0°C to 55°C, 93% rH |
| Storage conditions | -40°C to 85°C, 93% rH |
| Measurement range | -40°C to 85°C |
| Protection | Front: IP65/Rear: water and dust protection corresponds to IP31, accessibility of connectors limits rear part rating to IP00 |
| Environmental | Pollution degree III (can be mounted inside a refrigerated cabinet), non-condensing |
| Resistance to heat & fire | Category D (UL94-V0) |
| EMC category | Category I |
| Operating cycles | Compressor relay: more than 175,000 at full load ((16A) 16A) |
| Approvals | R290/R600a: EN/IEC 60079-15:2005, Glow wire according to EN/IEC 60335-1, IEC/EN 60730, UL60730, NSF, CQC, GOST R 60730. Note: These approvals are only valid when using the accessories listed in this document. |
Installation
- Insert the ERC 101 into the cabinet.
- Attach the clips to each side of the ERC 101.
Input/Output Diagram:
The controller has inputs for sensors (S1, S2) and outputs for the compressor (DO1) and other functions. It operates on 100-240VAC +/-10% 50/60Hz.
Dimensions:
The unit has a front panel height of 36.5 mm and a depth of 47.25 mm (51.25 mm total). The rear mounting cutout is 71 mm x 30 mm.
Display and Operation
- Press briefly to initiate defrost.
- Press and hold the button for 5 seconds to turn the unit ON/OFF.
- Use the UP/DOWN buttons (▲/▼) to adjust the setpoint.
- The green 'def' symbol is illuminated when in defrost mode.
- Pressing the upper left button (BACK) returns to the previous parameter group.
- Pressing the lower left button (OK) confirms a selection.
- Pressing both right buttons for 5 seconds accesses the operation menu.
Operation Menu Navigation:
- Parameter groups: Use UP/DOWN (▲/▼) to scroll through menu groups (e.g., LHE, ALA, CoP, DEF, Con, dIS, AS, SE). Use the higher left button to exit and the lower left button to confirm.
- Parameter name: Within a group, use UP/DOWN (▲/▼) to scroll through parameter names (e.g., HAt, LAt). Use the higher left button to exit and the lower left button to confirm.
- Parameter value: Adjust the parameter value using the UP/DOWN (▲/▼) buttons.
Parameters
| Menu | Parameters | Cod | Description | Min | Max | Unit | Default |
|---|---|---|---|---|---|---|---|
| Thermostat | Setpoint | Stp | Setpoint | -50 | 80 | C | 2 |
| Setpoint adjustment ratio | SPr | Current setpoint adjustment value dif * SPr | 0.0 | 1.0 | - | 0.0 | |
| Differential | diF | Thermostat differential | 0.0 | 20.0 | K | 2.0 | |
| Air temperature adjust | tAD | Air Temp Adjust | 0.0 | 20.0 | K | 0 | |
| Alarm | High temperature alarm | HAt | Alarm is activated above this temperature (Celsius) | -50.0 | 80.0 | C | 15.0 |
| Low temperature alarm | LAt | Alarm is activated below this temperature (Celsius) | -50.0 | 80.0 | C | -50.0 | |
| Compressor | Min run time | Crt | Minimum time compressor must run | 0 | 30 | min | 0 |
| Min Stop time | CSt | Minimum time compressor must idle | 0 | 30 | min | 0 | |
| Max OFF time | Cot | Maximum time compressor must idle | 0 | 480 | min | 0 | |
| Error run time | Ert | Compressor run time if temperature sensor is not working (0-60 minutes) | 0 | 60 | min | 0 | |
| Error stop time | ESt | Compressor stop time if temperature sensor is not working (0-60 minutes) | 0 | 60 | min | 0 | |
| Minimum cut-in voltage | uLi | When compressor is OFF: lowest compressor start voltage (0-270 V) | 0 | 270 | Vac | 0 | |
| Minimum cut-out voltage | uLo | When compressor is ON: lowest operation voltage (0-270 V) | 0 | 270 | Vac | 0 | |
| Maximum voltage | uHi | When compressor is ON: highest operation voltage (0-270 V) | 0 | 270 | Vac | 0 | |
| Power ON delay | Pod | Delay in seconds between power ON & compressor being activated | 0 | 300 | Sec | 180 | |
| Defrost | Defrost type | dFt | No: defrost function is disabled, nat: OFF-cycle defrost (natural defrost) | nat | |||
| Terminating temp | dtt | Temp at which defrost stop (evap temperature or cabinet temperature) | -50 | 85 | C | 25 | |
| Def Min Interval | dii | The minimum time in hours between the start of each defrost cycle | 0 | 96 | hours | 6 | |
| Def Max Interval | dAi | The maximum time in hours between the start of each defrost cycle | 0 | 96 | hours | 7 | |
| Def Min time | dit | The minimum duration of a defrost cycle in minutes | 0 | 240 | min | 10 | |
| Def Max time | dAt | The maximum duration of a defrost cycle in minutes | 0 | 480 | min | 30 | |
| Condenser Protection | Condenser Alarm Limit | CAL | If condenser sensor exceeds this temperature, alarm is activated | -50 | 85 | C | 75 |
| Condenser Block Limit | CbL | If this temperature is exceeded, compressor will be stopped | -50 | 85 | C | 85 | |
| Condenser OK limit | CoL | Temperature at which compressor may start after a stop due to exceeding CbL | -50 | 85 | C | 85 | |
| Condenser Low Temp | CLL | Temperature below which the compressor is not allowed to start | -50 | 85 | C | 60 | |
| Display | Lock-time After defrost | dLt | Display lock time after defrost [0-60 min] | 0 | 60 | min | 5 |
Assignments of Inputs and Outputs
| Assignments | S2 Application | o1 Configuration | Password level1 | Password level2 | Voltage value | Relay 1 counter | Interval counter | Defrost time counter | Firmware version | Hardware version |
|---|---|---|---|---|---|---|---|---|---|---|
| Input/Output Configuration | S2A (Sensor 2 Application) | o1C (Relay output 1) | PS1 (Shop owner) | PS2 (Service technician) | uAC (Current main power supply voltage) | rL1 (Thousands of cycles of compressor relay since manufacture) | int (Compressor run time since last defrost) | dnt (Duration of last defrost cycle [min]) | Fir (Danfoss software version number) | HAr (Danfoss hardware version number) |
| Configuration Options | nC (Not Connected), Sco (Temp control), EuA (Evap temp), Con (Cond temp {condenser cleaning}) | CoP (Compressor), HeT (Heater) | Most common parameters | All parameters with read permission and possibility to change a number of parameters | 0 - 270 Vac | 0 - 999 | 0 - 1000 | 0 - 999 min | -- | -- |
Problem Solving
| Problem | Probable Cause | Remedy |
|---|---|---|
| Compressor does not start | Waiting for compressor delay timer | Check CoP->CSt |
| Line voltage to compressor too low or too high | Check CoP->uLi, uLo, uHi | |
| E01 or E02 is shown on display | E01: Sensor "S1" defective E02: Sensor "S2" defective |
Replace sensor |
| Display alternates between "Con" and temperature | Condenser temperature exceeds the temperature set in condenser settings menu | Clean condenser, Check Con->CAL, CbL |
| Display alternates between "Hi" and temperature | Temperature too high | Check ALA->HAt |
| Display alternates between "Lo" and temperature | Temperature too low | Check ALA->LAt |
Important Safety Information
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 fulfill the reinforced insulation requirements.
Safety info: Risk of electrocution! For mounting: do not connect mains power until the controller is correctly mounted. For unmounting: disconnect the power supply before unmounting.
