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SPL user manual Page 15 of 24 0412-6180459 – rev.00
11 ALARM DIAGNOSTIC
Generally, all types of alarms and probe errors, where enabled, are managed when the machine is on or when
the machine is shutting down. When the status of the system changes from shutting down to off, when exiting
the configuration mode or start-up, the alarms and probe errors are reset.
An exception to the previous management:
NB: The alarm management is disabled in configuration mode.
Signal in the event of an alarm and error with Red LED
The presence of alarms and/or probe errors is signalled by the red LED on the keyboard and, if provided, from
the menu. The LED lights in the presence of at least one active alarm, flashing if there are only alarms that
have returned for some reason (not active) and can therefore be reset, off in the other cases. The LED status
is not restricted to the status of the unit (it also works with the unit off). The following paragraphs list the types
of alarms that can be found: for the resolution of all alarms (the presence of which is shown by the red
LED with fixed light) please contact the AERMEC service department.
Cumulative alarm relay
The presence of active alarms with manual reset, probe errors or anti-freeze alarm are signalled by the
cumulative alarm relay inside the electrical panel of the unit. The relay also functions with the system off (of
course for those alarms that are active when the system is off).
11.1 Thermoregulation alarms
- the BIOS alarms that are also managed even when the unit is off (if the system is off, the cumulative
alarm relay does not trip even if the BIOS is active. The red LED of the keyboard lights and “!Hw” appears
on the keyboard)
11.1.1 High temperature alarm
In the event the value of the temperature measured by the control probe is maintained at the higher level
set and the unit is set to produce cool/cold air, the high-temperature alarm is generated; it is a display only
alarm and manual reset.
11.1.2 Low temperature alarm
In the event the value of the temperature measured by the intake probe stays at the lower level than that
set and the unit is set to produce hot air, the low temperature alarm is generated; it is a display only alarm
and manual reset.
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