Toshiba MMK-AP0072H Service Manual page 17

3-9. Information
Confirmation before operation
• Turn on the power switch 12 hours before starting
the operation.
• Make sure whether earth wire is connected.
• Make sure the air filter is connected to the indoor
unit.
Heating capacity
• A heat pump system which absorbs heat from
outside of the room and then discharges heat into
the room is adopted for heating. If the outside
temperature falls, the heating capacity decreases.
• When the outside temperature is too low, it is
recommended to use this air conditioner together
with other heating equipment.
Defrost during heating operation
• In heating operation, if there is frost on the outdoor
unit, the operation changes automatically to the
defrost operation (Approx. 2 to 10 minutes) to
increase the heating efficiency.
• During defrost operation, the fan of the indoor unit
stops.
3-minutes protection
• When restarting the operation just after the
operation has been stopped or the main power
switch has turned on, the outdoor unit does not
work for approx. 3 minutes in order to protect the
air conditioner.
Power failure
• If a power failure occurred during operation, all
operations stop.
• When the power is returned after a power failure,
the operation lamp notifies the power-ON by
flashing operation lamp on the remote controller.
• When restarting the operation, push
button again.
Fan rotation in stopped unit
• In heating operation even in the stopped indoor
unit, the fan rotates once for several minutes per
approx. an hour when the other indoor unit is
operating to protect the air conditioner.
Protective device (High pressure switch)
This device stops automatically an operation when
excessive force is applied on the air conditioner.
If the protective device works, the operation stops
and the operation lamp flashes.
When the protective device works, the indication
and the check code are displayed on the
display section of the remote controller. In the
following cases, the protective device may work.
In cooling operation
• The suction port or discharge port of the outdoor
unit is closed.
• A strong wind continuously blows to the discharge
port of the outdoor unit.
In heating operation
• Dust or waste adheres excessively to air filter of
the indoor unit.
• The discharge port of the indoor unit is closed.
If the protective device works, turn off the main
power switch, solve the cause, and then start the
operation again.
Cooling/Heating operation of Super
Modular Multi system air conditioner
• Although each indoor unit can be individually
controlled in the Super Modular Multi system air
conditioner, the cooling operation and the heating
operation cannot be simultaneously performed in
the multiple indoor units which are connected to
an outdoor unit.
• If the cooling operation and the heating operation
are simultaneously performed, the indoor unit
which executes cooling operation stops, and
the operation section lights up. On the other hand,
the indoor unit which executes heating operation
continues running. In a case that the manager of
the air conditioner has fixed the operation to
cooling or heating, an operation other than that set
up is unavailable. If an operation other than that
set up is executed,
lights up and the operation stops.
Characteristics of heating operation
• The wind is not out just after starting an operation.
The hot wind starts to blow 3 to 5 minutes after
(Time differs according to indoor/outdoor tempera-
ture.) the indoor heat exchanger has warmed up.
• During operation, the outdoor unit may stop if the
outside temperature rises.
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FILE NO. SVM-05052
on the operation section
on