Toshiba MMD-AP0481HF2UL Service Manual page 79

7
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.
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 61 and
80 °F.
• The temperature of the air conditioning system can
be set outside of the range of 61 to 80 °F; 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
control.
13-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
• 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
control.
An indoor unit performing heating continues running.
When you attempt an operation without the configured
settings, the running preparation indicator
displayed on the remote control 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
– 7 –
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 (All filters are to be procured locally.)
• When the filter indicator is displayed on the remote control, 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
disappears.
TEMP.
TIMER SET FAN
TIME SAVE
FILTER
RESET TEST SET CL SWING/FIX
When the cleaning is complete, push the
" FILTER RESET" button.
ON / OFF
MODE
VENT
UNIT LOUVER
14-EN