Dixell/Copeland EE

What does Dixell/Copeland EE mean?

The EE alarm on the Dixell IC100CX iChill controller indicates an EEPROM memory error — the controller has detected that its non-volatile memory data is corrupted or unreadable. The controller activates the open collector alarm output, closes the alarm relay, and turns on the buzzer. This condition can result in loss of programmed parameters and requires immediate attention to prevent incorrect system operation.

Symptoms

• EE displayed on the IC100CX controller screen.
• Open collector alarm output and alarm relay both activate.
• Buzzer sounds continuously.
• Controller may revert to default parameters, altering setpoints and configuration.

Common causes

• Power supply voltage surge or brownout corrupting the EEPROM write cycle.
• EEPROM chip end-of-life — exceeded rated write cycles.
• Electrostatic discharge (ESD) event damaging controller memory.
• Controller firmware update interrupted or corrupted during the flash process.
• Physical damage to the controller circuit board.

Diagnostic steps

1. 01

   Power cycle the controller

   Switch off the IC100CX supply and wait 30 seconds before restoring power. Some EE alarms caused by transient supply disturbances will clear on power cycle if the EEPROM data is recovered.

2. 02

   Check and record all parameters

   If the controller restarts, immediately check all programmed parameters against the commissioning sheet. A corrupted EEPROM may cause the controller to revert to factory defaults, which can cause unsafe operation.

3. 03

   Reprogram parameters if reverted to defaults

   If parameters have been reset to factory defaults, reprogram all setpoints, alarm thresholds, and configuration settings per the original commissioning documentation before resuming system operation.

4. 04

   Inspect power supply quality

   Check the supply voltage to the IC100CX controller for stability. Use a multimeter or power quality analyzer to detect undervoltage, overvoltage, or excessive voltage spikes from the supply.

5. 05

   Replace the controller if alarm persists

   If EE recurs after power cycling and parameter reprogramming, the EEPROM chip or controller board has failed. Replace the IC100CX controller with an identical unit and fully reprogram per the commissioning sheet.

When to call a professional

Call a Dixell-authorized service technician if the EE alarm recurs after controller replacement, if the power supply quality investigation reveals panel-level electrical problems requiring a licensed electrician, or if controller replacement requires full parameter re-commissioning that is beyond available documentation.