Note: Refer to the manual of the outdoor unit for the detail of remote controller.

Phenomena

Cause

Countermeasure

(1)LED2 on indoor controller board

• When LED1 on indoor controller board is lit.

1 Reconfirm the setting of refrigerant

is off.

1 Mis-setting of refrigerant address for outdoor unit

 

(There is no unit corresponding to refrigerant

address for outdoor unit.

 

address “0”.)

Set the refrigerant address to “0”.

 

 

(For grouping control system under

 

 

which 2 or more outdoor units are

 

 

connected, set one of the units to “0”.)

 

 

Set refrigerant address using SW1 (3-6)

 

 

on outdoor controller circuit board.

 

 

 

(2)LED2 on indoor controller board

• When LED1 on indoor controller board is also blinking.

Check indoor/outdoor unit connecting wire

is blinking.

Connection failure of indoor/outdoor unit connecting

for connection failure.

 

wire

 

 

• When LED1 is lit.

1 Check the connection of remote con-

 

1 Miswiring of remote controller wires

troller wires in case of twin indoor unit

 

Under indoor unit system, 2 indoor units are wired

system. When 2 or more indoor units are

 

together.

wired in one refrigerant system, connect

 

 

remote controller wires to one of those

 

 

units.

 

2 Refrigerant address for outdoor unit is wrong or not

2 Check the setting of refrigerant address

 

set.

in case of grouping control system.

 

Under grouping control system, there are some units

If there are some units whose refrigerant

 

whose refrigerant address is 0.

addresses are 0 in one group, set one of

 

 

the units to 0 using SW1 (3-6) on outdoor

 

 

controller circuit board.

 

3 Shortcut of remote controller wires

34 Remove remote controller wires and

 

4 Defective remote controller

check LED2 on indoor controller board.

 

 

• When LED2 is blinking, check the

 

 

shortcut of remote controller wires.

 

 

• When LED2 is lit, connect remote

 

 

controller wires again and:

 

 

if LED2 is blinking, remote controller

 

 

is defective; if LED2 is lit, connection

 

 

failure of remote controller terminal

 

 

block etc. has returned to normal.

 

 

 

(3)Upward/downward vane

1 The vane is not downward during defrosting and

1 Normal operation (The vane is set to hor-

performance failure

heat preparation and when the thermostat is OFF in

izontal regardless of remote control.)

 

HEAT mode. (Working of COOL protection function)

 

 

2 Vane motor does not rotate.

2 Check 2 (left).

 

• Defective vane motor

• Check the vane motor. (Refer to “How

 

• Breaking of wire or connection failure of connector

to check the parts”.)

 

• Up/down vane setting is “No vanes”.

• Check for breaking of wire or connec-

 

 

tion failure of connector.

 

 

• Check “Up/down vane setting”. (Unit

 

 

function selection by remote controller).

 

3 Upward/downward vane does not work.

3 Normal operation (Each connector on

 

• The vane is set to fixed position.

vane motor side is disconnected.)

 

 

 

(4)Receiver for wireless remote

1 Weak batteries of wireless remote controller

1 Replace batteries of the wireless remote

controller

2 Contact failure of connector (CNB) on wireless

controller.

 

2~4

 

remote controller board(Insert failure)

Check contact failure of each connector.

 

3 Contact failure of connector (CN90) on indoor con-

If no problems are found in connector,

 

troller board(Insert failure)

replace indoor controller board.

 

4 Contact failure of connector between wireless

When the same trouble occurs even if

 

remote controller board and indoor controller board

indoor controller board is replaced,

 

 

replace wireless remote controller

 

 

board.

 

 

 

 

 

 

20

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Mitsubishi Electronics PCA-A24GA Is blinking, 3Upward/downward vane, Performance failure, 4Receiver for wireless remote

PCA-A24GA specifications

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