52
3.20 - AUDIBLE ALARMS
MAXIMUM TEMPERATURE
AUDIBLE ALARM
The boiler triggers an audible alarm when it is overheated.
The temperature threshold is set in parameter 3, which is
pre-configured at 88°C by the printed circuit board.
It can happen that, in certain cases, the working temperature
of the boiler has to be set much higher (e.g. unit heaters or fan
coils situated far from the boiler) than parameter 1 (working
temperature 80°C).
In this case, the overheating audible alarm could be triggered
frequently.
It is advisable to set parameter 3 (max temperature for thermal
inertia in boiler) at a higher value of up to 90°C.
If instead the alarm is triggered without the boiler overheating,
the cause may be an operating fault of the system like excess
draught in the flue, obstruction of the system or storage tank
pump, obstruction of the recirculation pump, or a defect with the
printed circuit board.
Advice for the user:
if it is necessary to set a working tem-
perature of more than 80°C, it is advisable to proportionally
increase parameter 2 (max temperature for thermal inertia in
the boiler).
PROBE AUDIBLE ALARM
The boiler has an intermittent alarm system that signals one or
more faults with the probes due to these being disconnected or
out of range; in any case, a message is displayed on the screen
referring to the probe or probes (in order) that are defective or
disconnected or out of range (e.g. "Probe S4 disconnected").
If the temperature to which the probes are subjected is out of
range, you need to wait for the temperature to return to a nor-
mal level. Replace the probe if you are certain the temperature
is not out of range.
If the problem relates to the connection of a probe, and the
message on the display indicates that a probe is disconnected,
check the connection concerned: if the probe is disconnect-
ed, simply reconnect it; but if it is connected, despite the alarm
message, contact the assistance centre because the probe is
clearly defective.
Summary of Contents for NOVAIREX 35
Page 1: ...INSTALLATION AND MAINTENANCE INSTRUCTIONS NOVAIREX 35 45 55 ...
Page 55: ......
