Notes On Operations And Performance; Maintenance - Toshiba Carrier MMD-UP0481HFP-UL 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 grounding wire is securely connected.
Make sure the air fi lter 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 pretection
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.
19-EN
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
controller.
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
fi lter 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 confi gured
settings, the running preparation indicator is
displayed on the remote controller and operation stops.
If operation is fi xed to cooling or heating by the air
conditioner administrator, only the confi gured settings
apply to the operation.
Characteristics of heating
When the outside temperature increases, the outdoor
unit may stop.
8

Maintenance

WARNING
For daily maintenance including Air Filter cleaning, make sure to ask the qualifi ed 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 fi lters
Ask qualifi ed service person to clean the fi lters for the models listed in the warning on the top of this chapter.
Clogged fi lters may lower the cooling and heating performance.
Long life prefi lter
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 122°F.
This may cause discoloration or deformation.
Do not expose to fi re. Doing so could cause a fi re.
─ 10 ─
High-effi ciency fi lter
Replace it when it is time for replacement.
When cleaning the long life prefi lter, check the dust
collecting status and the reduction in air volume for the
high-effi ciency fi lter, then replace the prefi lter when it
is time for replacement (approximately 2500 hours of
operation is recommended).
Note that the high-effi ciency fi lter cannot be washed
with water and reused.
However, the lifetime of the high-effi ciency fi lter may
be shortened depending on the intake air condition.
EN
FR
ES
20-EN