Air to Air Heat Exchanger with DX Coil Unit
Owner’s Manual
Air to Air Heat Exchanger with DX Coil Unit
Owner’s Manual
– 11 –
8
Air Conditioner Operations and
Performance
Check before operation
• Turn on the power switch at least 12 hours before
starting operation.
• Connect the earth wire securely.
• Attach the air filter 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.
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.
Protective device
(High pressure switch)
The high pressure switch stops the Air to Air Heat
Exchanger with DX Coil Unit automatically when
excessive load is applied to the Air to Air Heat
Exchanger with DX Coil Unit.
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
outlet 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 outlet 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
is
displayed on the remote controller and operation stops.
If operation is fixed to cooling or heating by the Air to
Air Heat Exchanger with DX Coil Unit administrator,
only the configured settings apply to the operation.
Heat exchange element
A smell may be emitted from the heat transfer element
during the initial stages of use. This is neither a
malfunction nor harmful.
9
Maintenance
Maintenance of the filter, heat exchange element, and humidifier
WARNING
Cleaning the filter, heat exchange element, humidifier element and other parts involves dangerous work in
high places. Ask a qualified installer or service person to do it.
Do not attempt it by yourself.
CAUTION
Do not push buttons with wet hands.
Doing so may result in electric shock.
◆
Filter maintenance
1
Clean the filter if “ ” is indicated on the remote controller.
2
Press the “
” button after cleaning the filter. The “FILTER RESET” indicator disappears.
CAUTION
Cleaning remote controller
• Use a dry cloth to wipe the remote controller.
• Do not use a damp cloth on the remote controller.
• Do not use a chemically-treated duster for wiping or leave such materials on the
unit for long.
It may damage or fade the surface of the unit.
• Do not use benzine, thinner, polishing powder, or similar solvents for cleaning.
These may cause the plastic surface to crack or deform.
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+00ET99915201_00Ta.book Page 11 Tuesday, February 15, 2011 6:45 PM
