Dixell/Copeland F3

What does Dixell/Copeland F3 mean?

The F3 alarm on the Dixell IC100CX iChill controller is a configuration alarm triggered when two digital inputs are activated simultaneously in a configuration where CF01=3 and CF07 is not equal to 6 (or Ar31=2/3 with CF07=3). This indicates a hardware or wiring conflict between digital input assignments that prevents normal operation of the associated circuit.

Symptoms

• F3 displayed on the IC100CX screen.
• Alarm icon illuminated on the display.
• Affected digital input-controlled outputs may not function correctly.
• System may restrict operation on the affected circuit.

Common causes

• Two digital inputs both active simultaneously in a configuration that expects exclusive activation.
• Wiring error causing both digital inputs to read active at the same time.
• Configuration parameter mismatch — CF01 and CF07 set inconsistently for the installation.
• Failed digital input relay or field device holding both inputs in the active state.

Diagnostic steps

1. 01

   Identify conflicting digital inputs

   Access the IC100CX digital input status screen and identify which two inputs are simultaneously active. Note their terminal numbers and cross-reference with the site wiring diagram.

2. 02

   Check field wiring for shorts or miswiring

   Inspect wiring at both digital input terminals for accidental shorts between the two input circuits. Check for crossed wires or shared common connections causing simultaneous activation.

3. 03

   Inspect the connected field devices

   Test each external device (relay, switch, or contactor) wired to the conflicting inputs. Verify contacts open and close correctly and do not both close at the same time during normal operation.

4. 04

   Review CF01 and CF07 configuration parameters

   Access the configuration parameters and confirm CF01 (circuit 1 configuration) and CF07 settings match the actual hardware wiring and the commissioning documentation for the installation.

5. 05

   Correct the configuration or wiring

   Either correct the field wiring to eliminate the simultaneous activation condition or adjust the CF parameters to match the actual wiring scheme. Power cycle the controller after changes.

When to call a professional

Engage the original commissioning technician or a Dixell-authorized service engineer if the CF01 and CF07 configuration parameters need to be changed, as incorrect configuration can alter fundamental circuit behavior. Parameter changes on iChill controllers should be documented and validated against the original system design.