Coreco E2

What does Coreco E2 mean?

On the Coreco controller (Carel easy / easy compact), E2 is a condenser-probe (or product/food-conservation probe, probe 3) fault. Probe 3 is enabled with parameter A4=10 for the dirty-condenser alarm or A4=11 as a product probe. With it unreadable, the dirty-condenser monitoring or product reading is lost. E2 flashes on the display, the buzzer sounds, and the alarm resets automatically once the probe reads correctly.

Symptoms

• Display shows E2 flashing alternating with the temperature
• Buzzer sounds when the alarm is enabled
• Dirty-condenser pre-alarm/alarm (cht/CHt) no longer functions
• Product-probe reading unavailable where probe 3 is used for product
• Alarm appears at power-up or during operation

Common causes

• Condenser/product probe signal interrupted (open circuit / broken wire)
• Condenser/product probe short-circuited
• Probe not compatible with the instrument
• Loose or corroded probe 3 terminal connection
• Faulty condenser or product probe element

Diagnostic steps

1. 01

   Confirm probe 3's role

   E2 is the third probe — condenser when A4=10 or product probe when A4=11. Check the parameter setting to know what probe 3 is configured to do on this unit.

2. 02

   Mute the buzzer

   Press SET to silence the buzzer; the E2 code and relay clear only once the probe fault is resolved.

3. 03

   Inspect the probe wiring

   With power isolated, check probe 3's lead and connector for an interrupted or short-circuited signal and reseat any loose or corroded terminal.

4. 04

   Check probe compatibility

   Verify the fitted probe is the correct type for the instrument, since an incompatible probe also raises E2.

5. 05

   Replace the probe if faulty

   If the wiring is good and the probe is the right type, replace probe 3 so the dirty-condenser or product monitoring is restored. E2 resets automatically when the probe reads correctly.

When to call a professional

Only qualified personnel may access the cabinet's electrical parts. If wiring checks do not clear E2, or the condenser/product probe must be replaced and the A4 configuration re-verified, have a qualified refrigeration technician complete the repair so dirty-condenser protection or product sensing works correctly again.