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Coreco CA

Dixell XW controller — serious external / pressure-switch alarm

Source: Coreco_1592027610-xw60lt-xw60lrt-gb-r10-13022012_termostatos.pdf

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What does Coreco CA mean?

On the Coreco controller (Dixell XW30/XW60/XW70), CA is a serious external alarm when a digital input is set as bAL, or a pressure-switch alarm when set as PAL. All regulation outputs are switched OFF while CA is active.

Symptoms

  • Display shows CA
  • All outputs OFF (refrigeration stopped)
  • Buzzer/alarm relay active
  • On PAL: nPS pressure-switch trips within the did window

Common causes

  • Serious external alarm on a bAL-configured input
  • Pressure switch tripped (PAL) — high/low pressure
  • Repeated pressure-switch activations reaching nPS within did
  • Fault in the connected protection device
  • Digital-input wiring or i1F/i2F configuration issue

Diagnostic steps

  1. 01

    Recognise the shutdown

    CA stops all outputs. Determine whether the input is bAL (serious external) or PAL (pressure switch).

  2. 02

    Investigate the protection device

    For PAL, inspect the pressure switch and the refrigeration condition that tripped it; for bAL, inspect the external protection device.

  3. 03

    Reset per the manual

    For repeated PAL trips reaching nPS, switch the instrument off and on to restart regulation after the cause is fixed.

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When to call a professional

CA indicates a serious/pressure fault that stops the unit. Have a qualified refrigeration technician diagnose the pressure or protection condition before returning it to service; this work is reserved for qualified personnel.

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Other Coreco error codes

E0

Control probe (probe 1) error — signal interrupted, short-circuited or incompatible probe

E1

Evaporator / defrost probe (probe 2) error — signal interrupted, short-circuited or incompatible probe

E2

Condenser / product probe (probe 3) error — signal interrupted, short-circuited or incompatible probe

IA

Immediate or delayed alarm from the multifunction digital input (external alarm)

dOr

Open-door alarm from the door-switch digital input

LO

Low-temperature alarm — measured temperature below set point by more than parameter AL

HI

High-temperature alarm — measured temperature above set point by more than parameter AH

EE

Unit parameter reading (data) error — saved configuration data error

EF

Operating parameter reading (data) error — manual reset

Ed

Defrost ended by timeout — last defrost stopped on maximum duration, not on temperature

dF

Defrost running — status message shown during a defrost cycle (not an alarm)

CHt

Dirty-condenser warning/alarm — pre-alarm (cht) between Ac-AE and Ac, then alarm (CHt) when Ac is exceeded and refrigeration stops (manual reset)

View all Coreco error codes →