Dixell/Copeland F5

What does Dixell/Copeland F5 mean?

The F5 alarm on the Dixell IC100CX iChill controller is a configuration alarm triggered when CF02=1 and either CF04 is not 2 or 3 and CF05 is not 3, or CF04=2 and conflicting conditions are present. It indicates an invalid combination of configuration parameters for the circuit type or expansion options, causing the controller to display an alarm code and flag the configuration error.

Symptoms

• F5 displayed on the IC100CX controller screen.
• Alarm icon lit on the display.
• Alarm code also appears on the alarm code display output.
• Affected circuit or expansion function operates incorrectly or not at all.

Common causes

• CF02, CF04, and CF05 parameter combination is invalid for the hardware installed.
• Parameters changed individually without maintaining consistency with related settings.
• Firmware update or parameter backup restore resulting in an incompatible combination.
• Incorrect commissioning of multi-circuit configuration options.

Diagnostic steps

1. 01

   Document current parameter settings

   Record the current values of CF02, CF04, and CF05 from the IC100CX service menu. This allows restoring the prior state if parameter changes do not resolve the alarm.

2. 02

   Refer to commissioning documentation

   Locate the original commissioning sheet for the installation. Verify whether CF02=1 was intentional and whether CF04 and CF05 were set to a valid combination per the iChill IC100CX manual.

3. 03

   Correct the parameter combination

   Set CF04 and CF05 to a combination that is valid when CF02=1 — typically CF04=2 or 3 with CF05=3 per the Dixell configuration matrix. Consult the full manual parameter dependency table.

4. 04

   Power cycle the controller

   After changing parameters, perform a controller power cycle to apply the new configuration. Check that F5 no longer appears on start-up.

5. 05

   Test affected circuit operation

   Verify the circuit or expansion function previously affected by F5 now operates correctly. Confirm all alarm outputs and relay states match expected behavior.

When to call a professional

Engage a Dixell-authorized technician or the original commissioning engineer if the configuration parameter dependencies for CF02, CF04, and CF05 are not clearly documented, or if the F5 alarm recurs after parameter correction — indicating a deeper firmware or hardware compatibility issue.