Mitsubishi Electric Mr.SLIM PKA-MKA Serie Manuel D'installation page 22

7. Test run
• On wireless remote controller
The continuous buzzer sounds from receiving section of indoor unit.
Blink of operation lamp
• On wired remote controller
Check code displayed in the LCD.
• If the unit cannot be operated properly after the above test run has been performed, refer to the following table to remove the cause.
Wired remote controller
Please Wait
Please Wait → Error code
Display messages do not appear even
when operation switch is turned ON
(operation lamp does not light up).
On the wireless remote controller with condition above, following phenomena takes place.
• No signals from the remote controller are accepted.
• OPE lamp is blinking.
en
• The buzzer makes a short piping sound.
Note:
Operation is not possible for about 30 seconds after cancellation of function selection. (Correct operation)
For description of each LED (LED 1, 2, 3) provided on the indoor controller, refer to the following table.
LED 1 (power for microcomputer)
LED 2 (power for remote controller)
LED 3 (communication between indoor and outdoor units)
20
Symptom
LED 1, 2 (PCB in outdoor unit)
For about 2
After LED 1, 2 are lit, LED 2 is turned off, then
minutes following
only LED 1 is lit. (Correct operation)
power-on
Only LED 1 is lit. → LED 1, 2 blink.
After about 2
minutes has
expired following
power-on
Only LED 1 is lit. → LED 1 blinks twice, LED 2
blinks once.
Indicates whether control power is supplied. Make sure that this LED is always lit.
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".
Indicates state of communication between the indoor and outdoor units. Make sure that this LED
is always blinking.
Cause
• For about 2 minutes following 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 (L1, L2, L3)
• Incorrect wiring between indoor and outdoor units
(incorrect polarity of S1, S2, S3)
• Remote controller wire short