Notes On Operations And Performance; Maintenance - Toshiba MMD-AP0481HFE Owner's Manual

7

Notes on operations and performance

Check before operation
• Turn on the power switch at least 12 hours before
starting operation.
• Make sure the earth wire is securely connected.
• Make sure the air filter is attached to the indoor unit.
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.
Information on the air
conditioning control system
• The temperature setting should be between 16 and
27 °C.
• The temperature of the air conditioning system can
be set outside of the range of 16 to 27 °C; however,
it may interfere with the temperature adjustment of
the indoor unit for air conditioning or may cause the
device to fail.
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
and the check code are displayed on the remote
controller.
15-EN
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 (for heat-pump model only)
• 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
Each unit can be controlled individually. However,
indoor units connected to the same outdoor unit cannot
perform cooling and heating simultaneously.
When you attempt simultaneous operation, indoor
units performing cooling are stopped, and the running
preparation indicator is displayed on the remote
controller.
An indoor unit performing heating continues running.
When you attempt an operation without the configured
settings, the running preparation indicator
displayed on the remote controller and operation stops.
If operation is fixed to cooling or heating by the air
conditioner administrator, only the configured settings
apply to the operation.
Characteristics of heating
When the outside temperature increases, the outdoor
unit may stop.
indicator
8

Maintenance

WARNING
For daily maintenance including Air Filter cleaning, make sure to ask the qualified service person particularly
following models as the maintenance requires high-place work;
CAUTION
Do not push buttons with wet hands.
Doing so may result in electric shock.
Cleaning the air filters
• When the filter indicator is displayed on the remote controller, clean the air filters.
• Ask qualified service person to clean the filters for the models listed in the warning on the top of this chapter.
• Clogged filters may lower the cooling and heating performance.
The " FILTER" indicator
is
REQUIREMENT
The factory default of the filter indicator is [2500H]. If the filter becomes excessively dirty, change the setting time. Ask
your dealer to describe how to change the setting time.
▼ Long life prefilter
Remove dust with a vacuum cleaner or rinse it off
with water.
• If excessively dirty, it can be cleaned effectively by
washing it with a soft brush and neutral detergent.
• After washing with water, drain off the water and dry
it in the shade.
REQUIREMENT
• Do not wash with water that is over 50 °C. This may
cause discoloration or deformation.
• Do not expose to fire. Doing so could cause a fire.
– 8 –
disappears.
TEMP.
TIMER SET FAN
TIME SAVE
FILTER
RESET TEST SET CL SWING/FIX
When the cleaning is complete, push the
" FILTER RESET" button.
▼ High-efficiency filter
Replace it when it is time for replacement.
When cleaning the long life prefilter, check the dust
collecting status and the reduction in air volume for the
high-efficiency filter, then replace the prefilter when it is
time for replacement (approximately 2500 hours of
operation is recommended).
Note that the high-efficiency filter cannot be washed
with water and reused.
However, the lifetime of the high-efficiency filter may be
shortened depending on the intake air condition.
ON / OFF
MODE
VENT
UNIT LOUVER
EN
16-EN