Mitsubishi Mr.SLIM SLZ-KA25VAQ Technical & Service Manual page 13

• On wired remote controller
Check code displayed in the LCD.
• If the unit cannot be operated properly after the test run, refer to the following table to find out the cause.
Wired remote controller
PLEASE WAIT
PLEASE WAIT → Error code
No messages appear even
when operation switch is turned
ON (operation lamp does not
light up).
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, refer to the following table.
LED1 (power for microprocessor)
LED2 (power for wired remote controller)
LED3 (communication between indoor and
outdoor units)
OCH493D
Symptom
For about 2 minutes after power-on
Subsequent to about 2 minutes
after power-on
Indicates whether control power is supplied. Make sure that this LED is
always lit.
Indicates whether power is supplied to the wired remote controller.
This LED lights only in the case of the indoor unit which is connected to the
outdoor unit refrigerant address "0".
Indicates state of communication between the indoor and outdoor units.
Make sure that this LED is always blinking.
•For about 2 minutes after power-on, operation of the
remote controller is not possible due to system start-up.
(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
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Cause