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12
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9
Troubleshooting
When the following symptoms are found, check the points described below before asking repair servicing.
Symptom
Cause
It is not a failure.
Outdoor unit
• White misty cold air or water
is out.
• Fan of the outdoor unit stops automatically and performs
defrost operation.
• Sometimes, noise of air leak
is heard.
• Solenoid valve works when defrost operation starts or
fi
nishes.
Indoor unit
• “Swish” sound is heard
sometimes.
• When the operation has started, during the operation, or
immediately after the operation has stopped, a sound such
as water
fl
ows may be heard, and the operation sound
may become larger for 2 or 3 minutes immediately after the
operation has started. They are
fl
owing sound of refrigerant
or draining sound of dehumidi
fi
er.
• Slight clacking sound is
heard.
• This is sound generated when heat exchanger, etc. expand
and contract slightly due to change of temperature.
• “
” indication is lit.
• When cooling operation cannot be performed because
another indoor unit performs heating operation.
• Is outdoor/suction temperature out of operation temperature
range?
• “
” indication is lit.
• When the manager of the air conditioner has
fi
xed the
operation to COOL or HEAT, and an operation contray to the
setup operation is performed.
• “
” indication is lit.
• When stopping the fan to prevent cool air blow at starting
heating.
• Sound or cool air is output
from the stand by indoor unit.
• Since refrigerant is
fl
owed temporarily to prevent stay of oil
or refrigerant in the stand by indoor unit, sound of
fl
owing
refrigerant, may be heard or white steam when other indoor
unit operates in HEAT mode, and cold air in COOL mode
may be blow-out.
• When power of the air conditioner is turned
on, “Ticktock” sound is heard.
• Sound is generated when the expansion valve operates
when power has been turned on.
• LCD blurs when it is touched.
• LCD may temporarily blur by static electricity.
Check again.
Stops automatically.
• Is the timer “OFF”?
Does not operate.
• Is it a power failure?
• Is the power switch turned off?
• Is the power fuse or breaker blown?
• Has the protective device operated? (The operation lamp
goes on.)
• Is the timer “ON”? (The operation lamp goes on.)
• Are COOL and HEAT selected simultaneously?
• (“
” indication is lit on the display of the remote controller.)
• Is the outdoor/suction air temperature outside of operating
temperature range? The operation is automatically stopped
(“
”on the remote controller display turms on).
If only fan operation is performed
• Is the outdoor/suction air temperature outside of operating
temperature range for cooling and heating? The operation is
automatically switched to the fan mode.
■
Con
fi
rmation and check
If a problem occurs with the air
conditioner, the OFF timer indicator
alternately shows the check code
and the indoor Unit No. in which the
problem occurred.
■
Troubleshooting history and con
fi
rmation
You can check the troubleshooting history with the following procedure if a problem occurs with the air conditioner.
(The troubleshooting history records up to 4 incidents.)
You can check it during operation or when operation is stopped.
• If you check the troubleshooting history during OFF timer operation, the OFF timer will be canceled.
Procedure
Description of operation
1
Push the OFF timer button for over 10 seconds
and the indicators appear as an image indicating
the troubleshooting history mode has been
entered. If [ Service check] is displayed, the
mode enters in the troubleshooting history mode.
• [01: Order of troubleshooting history] appears in
the temperature indicator.
• The OFF timer indicator alternately shows the
[check code] and the [indoor Unit No. ] in which
the problem occurred.
2
Each time the setting button is pushed, the
recorded troubleshooting history is displayed in
sequence. The troubleshooting history appears in
order from [01] (newest) to [04] (oldest).
CAUTION
In the troubleshooting history mode, DO NOT push
the Menu button for over 10 seconds, doing so
deletes the entire troubleshooting history of the
indoor unit.
3
After you have
fi
nished checking, push the ON/
OFF button to return to the regular mode.
• If the air conditioner is operating, it remains
operated even after the ON/OFF button has
been pushed. To stop its operation, push the
ON/OFF button again.
Check code
The indoor Unit No. in which
the problem occurred.
23-EN
24-EN
