Notes On Operations And Performance - Carrier Toshiba MMY-MUP0721FT6P-UL Owner's Manual

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Notes on operations and performance

Check before operation
Turn on the power switch at least 12 hours before
starting operation.
Make sure the ground wire is securely connected.
Make sure the air filter is attached to the indoor unit.
Heating performance
A heat pump system, which gathers outside heat and
emits it into a room, is used for heating. When the
outside air temperature falls, the heating capacity of
the unit is reduced.
When the outside temperature is low, it is
recommended that you also use other heating
equipment.
Heated air may not come out, when the outside
temperature is low (less than -13°F) and the room
temperature is 79°F or higher.
Defrosting during heating
If frost falls on the outdoor unit during heating,
defrosting is automatically performed
(for approximately 2 - 10 minutes) to increase the
heating effect.
The fan of the indoor unit is stopped during
defrosting.
3-minute protection
The outdoor unit will not operate for approximately
3 minutes after the air conditioner has been
immediately restarted after stopping, or the power
switch has been turned on. This is to protect the
system.
Power failure
In the case of a power failure, all operations stop.
To resume operations, push the ON / OFF button.
Fan rotation of a stopped
indoor unit
While other indoor units operate, the fans on
indoor units in stand-by mode rotate for several
minutes approximately once per one hour to protect
the machines.
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Protective device
(High pressure switch)
The high pressure switch stops the air conditioner
automatically when excessive load is applied to the
air conditioner.
If the protective device activates, the unit's running
stops and the operation lamp blinks.
When the protective device activates, the indicator
and the check code are displayed on the remote
control.
The protective device may activate in the following
cases:
During cooling
When the air intake or air discharge of the
outdoor unit is blocked.
When strong wind blows continuously against the
air discharge of the outdoor unit.
During heating
When dust or dirt is excessively adhered to the
air filter of the indoor unit.
When the air discharge of the indoor unit is blocked.
NOTE
When the protective device activates, turn off the
power switch, remove the cause, and then restart
running.
Cooling / Heating operations
When the outdoor temperature goes out of the operable range, cooling or heating operation may not be
performed in order to protect the equipment. In this case, "
If the outside temperature decreases during operation, the fan of the outdoor unit may stop.
Characteristics of heating
Air does not come out immediately after heating starts. Heated air comes out after 3 to 5 minutes (depending on
the room/outside temperatures), after the indoor heat exchanger warms up.
When the outside temperature increases, the outdoor unit may stop.
While an indoor unit is running in the heating mode, the outdoor unit supplies refrigerant to the other indoor units
which are not running. There, noise may come from the other indoor units or the exterior of them may become
warm.
If the Fan operation is performed while the Heat operation is performed in another room, the fan does not run.
Prohibition of NFC function (NFC tag)
NFC communications is enabled at the time of shipping from the factory, but it is possible to disable the test run with
a smart phone.
Please consult dealer from where you purchased it for more details.
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