Mitsubishi Electric PKA-RP100FAL#1 Service Manual download pdf (Page 18)

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If the unit cannot be operated properly after test run, refer to the following table to find the cause.

Symptom

Cause

Wired remote controller LED 1, 2 (PCB in outdoor unit)

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 → Error code

Display messages do not

appear even when operation

switch is turned ON (operation

lamp does not light up).

For about 2

minutes after

power-on

Subsequent to

about 2 minutes

after power-on

After LED 1, 2 are lighted, LED 2 is

turned off, then only LED 1 is

Only LED 1 is lighted. →

LED 1, 2 blink.

Only LED 1 is lighted.

→

LED 1 blinks twice,

LED 2 blinks once.

•For about 2 minutes following power-on,op-

eration 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

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 microcomputer) 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 addresses “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.

lighted.

(Correct operation)

• 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.

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Mitsubishi Electric PKA-RP100FAL#1 Service Manual Page 18

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