22
7.6 Exchanger low temperature alarm
After the compressor has been on for 15 minutes, if the heat exchanger
temperature (Tbe for cooling and dehumidification, Tbi for heating) falls
below T_cfrl, the unit will trigger a CF/RL alarm (all outlets are
deactivated, the air outlet louver performs a self-calibration), commands
are no longer accepted (either from the remote controller or from the
display unit) and the corresponding alarm code (see table above) is
shown on the display.
This alarm is deactivated in heating during defrosting.
The board may be reset only by disconnecting the power or sending a
reset command over the serial port.
7.7 Condensate level alarm
If contacts on the maximum water level microswitch are closed for more
than one minute (regardless of the compressor status), the unit triggers
an OF alarm (all outlets are deactivated, the air outlet louver performs a
self-calibration), commands are no longer accepted (either from the
remote controller or from the display unit) and the corresponding alarm
code (see table above) is shown on the display.
When the alarm has not yet been triggered (maximum water level
microswitch closed before 1 minute passes or the unit is placed in
standby), the alarm timer is reset.
The alarm is not triggered during antifreeze operation in cooling or
dehumidification mode.
The board may be reset only by disconnecting the power supply or by
sending a reset command over the serial port.
The possible causes are:
– Blocked or broken condensate disposal pump.
– Malfunction of the pump activation buoy.
– Burning of the pump power supply transformer.
– Excessive dirt in the basin.
– Blocked water distributor.
7.8 Pump reversal alarm
If bit 3 of the mch_id parameter is set and the condensate pump operates
continuously for another t_mmxfcp in cooling, or 3 minutes in
dehumidification mode, the disposal pump malfunction notice FCP is
shown on the display (see table above), the external fan (when it is
enabled) is set to low speed (also in night mode). Both conditions (fan at
high speed and FCP notice) will reset only when the unit is set to another
operating mode (including standby).
7.9 Invalid EEPROM parameters alarm
If the data stored in EEPROM are lost/invalid or if read/write does not
confirm this alarm, the unit will trigger an alarm and the corresponding
alarm code (see table above) is shown on the display.
The board may be reset only by disconnecting power or by sending a
reset command over the serial port.
7.10 Internal fan malfunction alarm
If the internal fan speed falls below 400 rpm for more than 30 seconds,
the machine triggers an SV alarm (all outlets are deactivated, the air
outlet louver performs a self-calibration), commands are no longer
accepted (either from the remote controller 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 disconnecting the power supply or by
sending a reset command over the serial port.
Possible causes are:
– Blocked or broken condensate disposal pump.
– Malfunction of the pump activation buoy.
7.11 Condenser assembly (internal/external)
overheat alarm
The pre-alarm turns off the unit.
The internal fan stays on at low speed for 30 sec.
The green LED indicating compressor operation stays on steady. After 3
minutes, the condensing T_batteria value is read again if the value of
condensing T_batteria < 60°C(140°F) the unit restarts.
AFTER 3 EVENTS OCCURRING IN 20 MINUTES, THE UNIT WILL
TRIGGER AN ALARM.
To Next Page
Loading...
