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Coreco rtF

Dixell XW controller — real-time-clock board failure (RTC models)

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

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What does Coreco rtF mean?

On the Coreco controller (Dixell XW30/XW60/XW70) with the optional RTC, rtF is a real-time-clock board failure: the alarm output turns on, defrosts fall back to the idF interval, and the manual says to contact the service.

Symptoms

  • Display shows rtF
  • Alarm output ON
  • Scheduled defrosts revert to the idF interval
  • Clock not keeping time

Common causes

  • Real-time clock board hardware failure
  • RTC unable to keep time after being set

Diagnostic steps

  1. 01

    Note the RTC failure

    rtF indicates the RTC board itself has failed; time-based defrosts revert to the idF interval in the meantime.

  2. 02

    Arrange service

    The manual instructs to contact the service — the controller/RTC board needs attention.

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When to call a professional

rtF is a hardware failure of the clock board; have a qualified technician service or replace the controller/RTC. Electrical access and replacement are 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)

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