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7
Receiver
The signal receivers with the exception of the separately installed signal receiver are mounted
on the indoor units.
A: Receiver This section picks up infrared signals from the wireless remote control unit (transmitter).
Indication lamps One of these lamps will blink when trouble has occurred. When an indicator lamp starts to
blink, refer to “Troubleshooting” on page 14.
B: Operation lamp This lamp lights when the appliance is turned on.
C: Timer lamp This lamp lights when the system is being controlled by the timer.
D: Standby lamp • This lamp lights at the following times during heating operations:
When operation has started, when the thermostat has been activated, during a defrosting
operation
• The lamp blinks when trouble has occurred.
E: Emergency operation
button
This is used when operation cannot be performed due to trouble with or loss of the wireless
remote control unit.
F: ADDRESS switch This switch is used in order to prevent the sending of signals to the wrong indoor unit when a
multiple number of indoor units that can be operated by the wireless remote control units have
been installed in the same room.
G: SWING button When this button is pressed, the airflow sweeps up and down automatically.
H: FILTER lamp This lamp lights to indicate that it is time to clean the filter.
• If two beeps are heard, the operation lamp among the indication lamps has lighted and the timer lamp and standby
lamp blink alternately in cases where heat pump models are used, this indicates a cooling/heating mode
mismatch and, as such, operation in the desired mode cannot be performed. (The same beeps will be heard and
the same operation lamps will light when auto cooling/heating has been selected on a model which does not have
the auto cooling/heating function.)
• When local operation has been set to disable because the centralized control mode is established, for instance,
pressing the ON/OFF operation button, MODE button or temperature setting buttons results in the sounding of
five beeps, and the attempted change in the operation will not be accepted.
X type
K type
T type
Separately installed
signal receiver
(A, U, D type)
OI-837-7-EG