Carrier 40MBFAQ Service Manual page 10

40MBFAQ: Service Manual
AUTO−RESTART Function
The indoor unit is equipped with an AUTO−RESTART function, which
is carried out through an auto−restart module. In the event of a sudden
power failure, the module memorizes the setting conditions prior to the
power failure. The unit resumes the previous operation setting (not
including the SWING function) automatically three (3) minutes after the
power returns.
If the memorization condition is the FORCED COOLING mode, the
unit runs in the COOLING mode for 30 minutes and switches to the
AUTO mode at the 75°F (24°C) setpoint. If the unit is off before the
power turns off and the unit is required to start up, the compressor delays
the start up for 1 minute before powering on. In other instances, the
compressor waits three (3) minutes before restarting.
FOLLOW ME
If the indoor PCB receives the signal, which results from pressing
FOLLOW ME on the remote controller or wired remote controller, the
buzzer emits a sound which indicates the FOLLOW ME function is
initiated. However, when the indoor PCB receives a signal from the
remote controller every three minutes, the buzzer will not respond. When
the unit is running with the FOLLOW ME function, the PCB will
control the unit according to the temperature from the FOLLOW ME
signal, and the temperature collection function of the room temperature
sensor is shielded.
When the FOLLOW ME function is available, the PCB controls the unit
according to the room temperature from the remote controller and the
setting temperature. The PCB changes the mode based on information
from the remote controller signal, however it is not affected by the setting
temperature.
If the unit is running under the FOLLOW ME function and the PCB
does not receive a signal from the remote controller for seven minutes or
after pressing FOLLOW ME again, the FOLLOW ME function turns
off automatically, and the temperature controls the unit according to the
room temperature detected from its own room temperature sensor and
setting temperature.
Manufacturer reserves the right to change, at any time, specifications and designs without notice and without obligations.
Refrigerant Leak Detection
With this new technology, the display area displays "EC" when the
outdoor unit detects a refrigerant leak. This function is only active in the
COOLING mode. This function helps to prevent the compressor from
being damaged by a refrigerant leak or a compressor overload.
• Open Condition: When the compressor is running, the value of the T2
coil temperature sensor has no to very little change.
46°F (8°C) Heating
When the compressor is running, the indoor fan motor runs without the
ANTI-COLD air function. When the compressor is off, the indoor fan
motor is off.
Silence Operation
Press SILENCE on the remote control to initiate the SILENCE function.
When the SILENCE function is activated, the compressor running
frequency remains lower than F2 and the indoor unit emits a faint breeze,
which reduces the noise to the lowest level and creates a quiet and
comfortable space for the user.
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