Installer Guide: The DC2 FAQs and Fault Codes Explained

This guide covers programming, diagnostics, and troubleshooting for the DC2 controller. It’s designed to help you identify issues quickly, resolve common faults, and reduce downtime on site.

If you’re here for a specific fault code, scroll to the diagnostic section — most issues can be resolved without a full reset or replacement.

DC2 Diagnostic Display & Fault Codes

This is the fastest way to identify what the system is doing and where the issue is coming from. Each fault includes a quick first check to help resolve the issue immediately before deeper diagnostics are needed.

Start by noting the fault code shown on the DC2 display, then select the relevant code below to expand it.

Startup Status

Three horizontal lines: System ready for operation

Blank display: No power to the board

What to check: Mains Fuse or Mains Power Supply

Fault Code 1: Emergency Stop Activated

Meaning: Emergency stop or external stop input is active

Check first:

• Release any emergency stop buttons

• Check installation for active safety stop inputs

• Verify the factory-fitted link is correctly installed

• Check the external stop button for continuity

Fault Code 2: Safety Edge Activated

Meaning: Safety edge triggered or faulty

Check first:

• Inspect the safety edge for activation or damage

• Check or replace the safety edge if required

• Confirm DIP2 (Switch 1) is correctly set

• Check connection wiring and line integrity

• If a dot is also displayed → possible hardware error

Fault Code 3: Photocell Activated

What the system is telling you: Light barrier interrupted or faulty

Check first:

• Check the alignment of photocells

• Inspect wiring and cable connections

• Replace the photocell if necessary

• Confirm DIP switch configuration

Fault Code 4: Power Supply Instability/ Relays Damaged

What the system is telling you: Voltage issue or  internal relay/ PCB failure

Most likely cause:

• Loose mains connection

• Internal voltage fluctuation

• Poor terminal connection

Check first:

• Check the incoming supply

•  Tighten all power terminals.

• Turn the 230V mains on and off.

  
  

If still showing Fault Code Four, reach out to technical@ellard.co.uk and discuss replacing the control circuit board.

Fault Code 5: Runtime Configuration Error

What the system is telling you: Run time settings exceed configured limits

Most likely cause:

• Incorrect DIP switch setup (RT settings)

• Misconfigured installation profile

  
  

Check first:

• Check installation setup

• Verify DIP switch positions

• Confirm pre-installed bridges are correct

• Check external limit switch links

Fault Code 6: Pull-in Protection Activated

What the system is telling you: The safety system has stopped movement due to a protection trigger

Most likely cause:

• Door obstruction or binding

• Misaligned safety system

  
  

Check first:

• Check installation and mechanical setup

• Verify alignment of light barriers

Fault Code 7: Input IN Short Circuit / DIP Switch Error

What the system is telling you: Input fault or incorrect DIP configuration

Most likely cause:

• Wiring short or crossed connections

• Incorrect configuration of inputs

  
  

Check first:

• Check installation wiring for short circuits

• Verify DIP switches PROG II (Dip 1 & 2) are correctly set or OFF as required

Fault Code 8: RAM / ROM Test Failed

What the system is telling you: Internal control board fault

Next Steps:

• Replace the circuit board

• Escalate to technical support at technical@ellard.co.uk

Fault Code 9: SK Safety Chain Activated (Slack Rope / Roll-off device)

What the system is telling you: Safety chain has been triggered

Check first:

• Check wiring integrity

• Inspect and reposition safety switches

• Confirm correct switch operation

Still Experiencing an Issue?

Before escalating or replacing parts, complete the following checks:

• Confirm all safety devices (photocells, safety edge, stop circuit) are correctly aligned

• Check that no mechanical obstruction is present

• Verify DIP switch configuration matches installation type

• Power cycle the system after corrections

  
  

Most DC2 faults are resolved at this stage without component replacement. If the issue persists, contact technical support at technical@ellard.co.uk with the fault code and installation details.

What Issue Are You Currently Facing?

• Fault Code 1: Emergency Stop Activated
• Fault Code 2: Safety Edge Activated
• Fault Code 3: Photocell Activated
• Fault Code 4: Power Supply Instability/ Relays Damaged

See All Options

How do I program transmitters with the DC2?

The DC2 can store up to 20 transmitters, giving flexible control across multiple users, access points, or installation requirements. This makes it suitable for both single-site setups and larger systems where controlled access needs to be shared without compromising simplicity or reliability.

Here's how to program them:

• Turn off mains power and connect the radio receiver

• Restore power

• Enable Dip Switch 5 (Prog2)

• Display will show “0”

• Press the button on the transmitter

• The display will increment for each device (up to 20 transmitters)

• Turn off Dip Switch 5 once complete

  
  

Testing Transmitters

• First press → impulse up

• Second press → stop

• Third press → impulse down

  
  

Important: This system uses impulse control. Ensure all safety devices are correctly configured before operation.

Optionally, use an external 24V DC radio receiver for impulse-up and dead-man-down operations.

How do I delete transmitters with the DC2 panel?

Transmitters can be removed individually without clearing memory.

• Enable Dip Switch 5 (Prog2)

• Scroll to the transmitter number

• Press and hold the program button until a double beep confirms deletion

• Disable Dip Switch 5

Overview of the DC2's key specifications:

Supply Voltage: Operating at 230VAC 

Frequency: 50 Hz

Max motor power: 1150W

Wiring Capacity: Supports wiring up to 1.5 mm²

Operating Temperature: Capable of operating within a temperature range of -10°C to +55°C

Outputs: 

• 3x NO relay contacts at 230V / 5A

• 2x NO relay contacts at 230V / 2A

• 24V DC unregulated output (max 200mA)

DIP Switch Configuration Overview

The DC2 uses four dipswitch banks to control system behaviour:

Prog2 / Dip 1

Switch 1: keypad programming

Switch 5: transmitter programming

Prog1 / Dip 2

Switch 1: optical or resistive safety edge selection

Switch 3: extended runtime mode

RT / Dip 3

Runtime adjustment (8–193 seconds)

CT / Dip 4

Autoclose adjustment (5–129 seconds)

Need to Talk to the Team?

The DC2 system is designed to protect both the operator and the equipment, which means many stoppages are actually safety or configuration responses rather than component failures.

Working through the fault code first, then following the quick checks in this guide, will resolve the majority of issues without the need for part replacement or escalation. In most cases, the key is confirming safety devices, wiring integrity, and DIP switch configuration before moving to deeper diagnostics.

If the fault remains after completing these steps, our technical team can help you pinpoint the issue and get the system back into operation quickly.

Contact technical support 📧 : technical@ellard.co.uk