Remeha Selecta Fault codes & diagnostics

Controlled stop: flow set point exceeded by 5°C

External interlock circuit open

Control stop from 3 till 10 minutes; set flow temperature (t1) has already been reached and the heating demand still exists.

Control stop; measured flow temperature (t1) is higher than the flow temperature set (Tset flow).

Shut down; maximum temperature rise is exceeded or if the dT between the supply and return temperature ≥ 45°C or a rate of rise in the flow temperature > 1°C/sec.

Flow or return sensor fault. Short circuit in the flow, return or boiler temperature sensor. Defective or not (properly) connected flow, return or boiler temperature sensor.

After any error; the 3 minute venting cycle will run first before starting the boiler

After any error; the 3 minute venting cycle will run first before starting the boiler

Control unit or earth fault. Mains supply not correctly earthed. Control unit faulty.

More than 5 start attempts without any flame formation.

No ionisation or ionisation failure more than 5 times during one heat demand.

Unwanted flame formation

After any error; the 3 minute venting cycle will run first before starting the boiler

Fan fault

After any error; the 3 minute venting cycle will run first before starting the boiler

Air box temperature to high

After any error; the 3 minute venting cycle will run first before starting the boiler

Parameter limits

Parameter check

Default parameters

Celcia 20 control override due to frost thermostat call for heat