Coreco rtF Error Code
Dixell XW controller — real-time-clock board failure (RTC models)
Source: Coreco_1592027610-xw60lt-xw60lrt-gb-r10-13022012_termostatos.pdf
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
Ask the AskWhiz AI about Coreco rtF
AskWhiz
online
Diagnostic steps
Note the RTC failure
rtF indicates the RTC board itself has failed; time-based defrosts revert to the idF interval in the meantime.
Arrange service
The manual instructs to contact the service — the controller/RTC board needs attention.
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.
Stop searching through PDFs. Our AI assistant on WhatsApp is trained on official Coreco documentation and can diagnose this fault code and guide you through the repair in minutes.
5 free questions per bot in your browser — no signup.
Other Coreco Error Codes
Control probe (probe 1) error — signal interrupted, short-circuited or incompatible probe
Evaporator / defrost probe (probe 2) error — signal interrupted, short-circuited or incompatible probe
Condenser / product probe (probe 3) error — signal interrupted, short-circuited or incompatible probe
Immediate or delayed alarm from the multifunction digital input (external alarm)
Open-door alarm from the door-switch digital input
Low-temperature alarm — measured temperature below set point by more than parameter AL
High-temperature alarm — measured temperature above set point by more than parameter AH
Unit parameter reading (data) error — saved configuration data error
Operating parameter reading (data) error — manual reset
Defrost ended by timeout — last defrost stopped on maximum duration, not on temperature
Defrost running — status message shown during a defrost cycle (not an alarm)
Dirty-condenser warning/alarm — pre-alarm (cht) between Ac-AE and Ac, then alarm (CHt) when Ac is exceeded and refrigeration stops (manual reset)
AskWhiz Playground
Test your diagnostic skills
Play a real HVAC service call in the AskWhiz Playground — real brands, real fault codes, no signup.
Play a real service call