17
OCHT669
• If the unit cannot be operated properly after the test run, refer to the following table to find out the cause.
Symptom
Cause
Wired remote controller
On the wireless remote controller with condition above, following phenomena take place.
• No signals from the remote controller can be received.
• Operation lamp is blinking.
• The buzzer makes a short ping sound.
PLEASE WAIT
PLEASE WAIT
→
check code
No messages appear even
when operation switch is turned
ON (operation lamp does not
light up).
For about 3 minutes after power-on
Subsequent to about 3 minutes
after power-on
•For about 3 minutes after power-on, operation of the
remote controller is not possible due to system startup.
(Correct operation)
•Connector for the outdoor unit’s protection device is not
connected.
•Reverse or open phase wiring for the outdoor unit’s
power terminal block
•Incorrect wiring between indoor and outdoor units.
(incorrect polarity of S1, S2, S3)
•Remote controller wire short
Note:
Operation is not possible for about 30 seconds after cancellation of function selection. (Correct operation)
For description of each LED (LED1, 2, 3) provided on the indoor controller board, refer to the following table.
LED1 (power for microprocessor)
Indicates whether control power is supplied. Make sure that this LED is
always lit.
LED2 (power for remote controller)
Indicates whether power is supplied to the remote controller.
This LED lights only in the case of the indoor unit which is connected to the
outdoor unit refrigerant address “0”.
LED3 (communication between indoor and
outdoor units)
Indicates state of communication between the indoor and outdoor units.
Make sure that this LED is always blinking.
