Olimpia splendid MAESTRO SMART 9HP - Alarm Diagnostics; General Alarm Codes; Filter Warning; Temperature Sensor Alarms

MAESTRO SMART 21
7 ALARM DIAGNOSTICS
7.1 Alarm codes
DESCRIPTION
DL1
(Green)
DL2
(Yellow)
DL3
(Green)
DL4
(Red)
High internal coil temp
ON
High external coil temp
ON
ON
External air sensor
disconnected
ON
Internal motor malfunction
ON
ON
Condenser assembly
temperature not reached
ON ON
Water level
ON
ON
ON
EEPROM parameter not valid
ON
Internal ambient sensor
shorted out
ON ON
Internal ambient sensor not
connected
ON ON ON
External coil sensor
shorted out
ON ON ON
External air sensor shorted out
ON
External coil sensor not
connected
ON ON ON ON
Condenser assembly
overheated (internal/external)
ON
7.2 Filter warning
This warning is displayed when the internal fan has operated (at any
speed and any operating mode) for more than 4 x t_fs hours. The unit,
however, continues to run and the indicator as well as the corresponding
timers are reset by pressing the emergency H button on the display (the
first press resets the warning; the second places the unit in standby
mode). The internal FS meter is increased every 10 minutes of operation
of the internal fan, and it is stored in EEPROM in order to restore the
clock after a power disconnect.
This warning is not reset after a power disconnect.
7.3 Temperature sensor alarm (TFS)
When the detected temperature values are outside of the range of -40°C–
100°C(-40°F–212°F), the unit stops operating (all outlets are deactivated,
the air outlet louver performs a self-calibration), commands are no longer
accepted
(either from the remote control or from the display unit) and the
corresponding alarm code (see table above) is shown on the display,
distinguishing between a disconnected sensor and a short circuited
sensor. The board may be reset only by turning off the power or by
sending a reset command via the serial port.
7.4 External exchanger overheat alarm (HTE)
When Tbe > thte the internal fan and the compressor are shut off, while
the external fan continues to run for 30 seconds at low speed. The
display shows TFS, indicating exchanger overheat (see the preceding
table). After 3 minutes, if TBE < thte the unit can restore its prior
operating program. If this warning occurs more than two times within
t_at minutes,
the unit emits an HTE alarm (all outlets are deactivated, the air outlet
louver performs a self-calibration), commands are no longer accepted
(either from the remote control or from the display unit) and the
corresponding alarm code (see table above) is shown on the display.
The board may be reset only by turning off the power or by sending a
reset command via the serial port.
The possible causes are:
– Dirty external coil.
– Obstructed intake grille.
– External air fan blocked or operating slowly.
– Internal/external air temperature too high.
7.5 Internal exchanger overheat alarm
When Tbi > thti, the external fan and the compressor are shut off, while
the internal fan continues to operate for 30 seconds at low speed. The
display shows the TFS exchanger overheat notice (see table above).
After 3 minutes, and if Tbi < thti, the unit can restore its prior operating
program.
If this warning occurs more than 2 times within t_at minutes, the unit
emits an HTE alarm (all outlets are deactivated, the air outlet louver
performs a self-calibration), commands are no longer accepted (either
from the remote control or from the display unit) and the corresponding
alarm code (see table above) is shown on the display.
The board may be reset only by turning off the power or by sending a
reset command via the serial port.
The possible causes are:
– Dirty intake filter.
– Dirty internal coil.
– Obstructed intake grille.
– External air fan blocked or operating slowly.
– Internal/external air temperature too high.