Command Description - Failure Operation; Failure Operation - Control Panel Functions Available - Spheros Aerosphere World Betriebsanleitung

Aerosphere World / Midibus
This mode operates only when the set-point temperature is higher than or is
equal to the internal temperature and the external temperature exceeds 8° C.
Any other conditions will not allow the driver to select the reheat mode as
indicated by (when external temperature is less than 8 °C) or
point temperature exceeds internal temperature).
Reheat operation is particularly recommended in inter-seasonal periods
when the air is extremely humid.

3.2 Command Description - Failure Operation

3.2.1 Failure Operation - Control Panel Functions available

The system includes temperature sensors located at three distinct points. If
there is a failure in any internal sensor, the panel will indicate
system defaults 22 °C for this sensor. In case there is a failure in the air duct
sensor, the panel will indicate
the panel will indicate .
The compressor high and low pressure switches are monitored in series and
not identified individually. In case of a failure on this signal, the display will
indicate and the output for compressor and condensers operation will
be off. The module waits for a minimum of 3 minutes attempting to reactivate
the output. If there are 6 consecutive pressure switch failures within 30
minutes, the panel will indicate
resume normal operation if the system is switched off and on again.
In case the alternator voltage reaches 33 Volts or more, the panel will indicate
. If the voltage drops below 21 Volts the panel will indicate
voltage drops below 18 Volts the panel will indicate
all functions are disabled.
If the battery voltage exceeds 31 Volts the panel will indiate
system is in heating mode and reheat mode is enabled and the external
temperature is below 8 °C, the compressor will be turned off and the panel
will indicate .
If the temperature of the set-point is lower than the internal temperature and
the reheat key is pressed, the panel indicates
is in refrigeration mode.
34
and the
, if there is a failure in the external sensor,
inactivating all functions. It will only
. In all three cases,
. In case the
to show that the system
The following Fig. lists all possible failure codes and their meaning.
Fail- Description
ure
(set-
Communication failure
between panel and
main relay board.
Internal sensor failure. The system defaults an internal tempera-
Air duct sensor failure. Control takes place regarding the air return
External sensor failure. The system uses an external air tempera-
Pressure switch failu-
re.
. If the
The indication shows
that six pressure
switch failures occur-
red within 30 minutes.
Freezing of the evapo-
rator coil.
Operational bahavior in fail condition
The system automatically activates the A/C
AUTO function using a previously stored
set-point.
ture value of 22 °C.
For heating the driver must program a set-
point temperature above 22 °C (set point >
22 °C). If cooling is necessary, the driver
must select a set-point smaller or equal to
22 °C (set point <= 22 °C).
temperature, with the parameter value
equal to 0.
ture value of 22 °C. The reheat and the
smart air modes are disabled.
The condenser and compressor are turned
off. When the failure disappears the sy-
stem is reactivated with a delay of 3 minu-
tes.
The system can operate only in ventilation
or heating mode. In order to turn the A/C on
again, it is necessary to restart the module
(system off and on again).
When the failure disappears the system
will resume its operational condition before
fail taking into account the possible change
of control parameters.
Fig. 5 Failure Code Indications