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Confirmation and check
When a problem occurred in the air conditioner, check code
and indoor UNIT No. appear on the display part of the remote
controller.
The check code is only displayed during the operation.
If the display disappears, operate the air conditioner
according to the following "Confirmation of check code" for
confirmation.
Check code
Indoor UNIT No. in which
a problem occurred
99-EN
Confirmation of check code
When a problem occurred on the air conditioner, the check
code can be confirmed with the following procedure. (The
check code is stored in memory up to 4 check codes.)
The log can be confirmed from both operating status and stop
status.
2
3
1
1
When
and
buttons are pushed at the
same time for 4 seconds or more, the
following display appears.
If
is displayed, the mode enters in the
check code mode.
• [01: Order of check code] is displayed in CODE No..
• A check code is displayed on left side.
• [Indoor unit address in which a problem occurred] is
displayed in UNIT No..
.
2
Every pushing of
button used to set
temperature, the check code stored in
memory is displayed in order.
The numbers in CODE No. indicate CODE
No. [01] (latest) [04] (oldest).
REQUIREMENT
Do not push
button because all the check code of the
indoor unit will be deleted.
3
After confirmation, push
button to return
to the usual display.
– 55 –
11
Operations and Performance
▼ Check before running
• Check whether the earth wire is cut or disconnected.
• Check whether the air filter is installed.
• Turn on the circuit breaker 12 hours or more before starting
operation.
▼ 3 minutes protection function
3-minutes protection function prevents the air conditioner
from starting for initial 3 minutes after the main power switch
/ circuit breaker is turned on for re-starting the air conditioner.
▼ Power failure
Power failure during operation will stop the unit completely.
• To restart the operation, push the ON / OFF button on the
remote controller.
• Lightning or a wireless car telephone operating nearby
may cause the unit to malfunction. Turn off the main power
switch or circuit breaker and then turn them on again. Push
the ON / OFF button on the remote controller to restart.
▼ Defrosting operation
If the outdoor unit is frosted during the heating operation,
defrosting starts automatically (for approximately 2 to 10
minutes) to maintain the heating capacity.
• The fans in both indoor and outdoor units will stop during
the defrosting operation.
• During the defrosting operation, the defrosted water will be
drained from the bottom plate of the outdoor unit.
▼ Heating capacity
In the heating operation, the heat is absorbed from the
outside and brought into the room. This way of heating is
called heat pump system. When the outside temperature is
too low, it is recommended to use another heating apparatus
in combination with the air conditioner.
▼ Air conditioner operating conditions
For proper performance, operate the air conditioner under the following temperature conditions:
Refer to the combined outdoor unit installation manual for details about the outdoor temperature.
Room temperature
Cooling operation
Room relative humidity – less than 80 %. If the air conditioner operates in excess of this
[CAUTION]
figure, the surface of the air conditioner may cause dewing.
Heating operation
Room temperature
If air conditioner is used outside of the above conditions, safety protection may work.
▼ Protective device
• Stops operation when the air-conditioner is overloaded.
• If the protective device is activated, the unit stops running,
and the operation indicator and check indicator on the
remote controller blink.
▼ If the protective device is activated
• Turn off the circuit breaker and perform a checkup.
Continued running may cause a malfunction.
• Check whether the air filter is installed. If not, the heat
exchanger may be clogged with dust and water leakage
may occur.
▼ During cooling
• The air intake or discharge of the outdoor unit is clogged.
• Strong wind continuously blows against the discharge of
the outdoor unit.
▼ During heating
• The air filter is clogged with a large amount of dust.
• The air intake or discharge of the indoor unit is clogged.
▼ Do not turn off the circuit breaker
• During the air-conditioning season, leave the circuit
breaker turned on, and use the ON / OFF key on the
remote controller.
▼ Attention to snowfall and freeze on the
outdoor unit
• In snowy areas, the air intake and air discharge of the
outdoor unit are often covered with snow or frozen up.
If snow or freeze on the outdoor unit is left as it is, it may
cause machine failure or poor warming.
• In cold areas, pay attention to the drain hose so that it
perfectly drains water without water remaining inside for
freeze prevention. If water freezes in the drain hose or
inside the outdoor unit, it may cause machine failure or
poor warming.
: 21 °C to 32 °C (Dry bulb temp.), 15 °C to 24 °C (Wet bulb temp.)
: 15 °C to 28 °C (Dry bulb temp.)
100-EN
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