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23.- ALARM CODES
The TRO Evolution System boiler has an electronic circuit which performs continuous self-testing
to detect any operating failures in the boiler. When the electronic control detects an operating
error, it indicates this by showing an alarm code on the display. The following list describes the
possible alarm codes:
CODE ALARM DESCRIPTION
Pressure
The pressure in the installation has dropped to below 0.5
bar. The boiler will cut out. To unblock it, fill the
installation at a pressure of 1 - 1.5 bar.
This alarm may be set off due to the water having been
drained from the boiler or leakage in the installation.
If this alarm occurs repeatedly, you should contact the
nearest official technical assistance service.
Temperature
The boiler has exceeded the safety temperature of 110
ºC. The boiler will cut out. To unblock it, press the safety
thermostat button when the temperature has dropped.
If this alarm occurs repeatedly, you should contact the
nearest official technical assistance service.
Burner
The burner has cut out. To unblock it, press the
illuminated button on the burner (10).
This alarm is set off when there is a functioning anomaly
in the burner or the fuel installation.
If this alarm occurs repeatedly, you should contact the
nearest official technical assistance service.
Boiler sensor
The boiler sensor (8) is damaged or disconnected.
Contact your nearest official technical assistance
service to have it replaced.
DHW sensor.
(with hot water tank
only)
The tank DHW sensor is damaged or disconnected.
Contact your nearest official technical assistance
service to have it replaced.
SRHFC2/EV flow sensor
(only with SRHFC2/EV
kit)
The underfloor heating sensor is damaged or
disconnected. Contact your nearest official technical
assistance service to have it replaced.
Pressure sensor
The pressure sensor (6) is damaged or disconnected.
Contact your nearest official technical assistance
service to have it replaced.
Overpressure
This indicates that the water pressure in the boiler is over
2.5 bar, warning that the installation is in overpressure
status. Boiler functioning will NOT cut out.
To restore normal boiler functioning, drain the boiler until
it reaches a pressure of 1 – 1.5 bar.
If this warning occurs repeatedly, you should contact
the nearest official technical assistance service.
NOTE: It will be very useful for the technical assistance service if you can inform them of the
alarm code that has appeared on call-out.
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