Mitsubishi Electronics PCA-A24GA Is blinking, 3Upward/downward vane, Performance failure

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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.

 

 

 

 

 

 

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Contents Contents Revised EDITION-BPCA-A24GA PCA-A30GAReference Manual Technical Data BookTechnical Changes Safety Precaution Always Observe for SafetyWhen charging directly from cylinder Additional refrigerant chargePart Names and Functions Indoor UnitDisplay Section Operation Mode display Mode Select buttonTemperature setting display Timer displaySpecifications Service RefPCA-A30GA, PCA-A30GA1Single phase, 60Hz, 208/230V PCA-A36GA, PCA-A36GA1Single phase, 60Hz, 208/230VNoise Criterion Curves PCA-A24GA1PCA-A30GA1 PCA-A36GA1Outlines and Dimensions PCA-A24GA PCA-A24GA1 PCA-A30GA PCA-A30GA1PCA-A36GA PCA-A42GA PCA-A36GA1 PCA-A42GA1 Unit inchmmWiring Diagram Indoor unit Installation ManualRefrigerant System Diagram Heat exchangerTroubleshooting TroubleshootingSELF-DIAGNOSIS Action Table Working Pipe temperatureCause Countermeasure Freezing/overheating protection is Cause Countermeasure Pipe temperature thermistor Remote controller transmissionErrorE0/signal receiving errorE4 ErrorE3/signal receiving errorE5Error Signal receiving error Error Transmitting errorRemote controller control board Indoor controller boardTroubleshooting by Inferior Phenomena Phenomena Cause CountermeasureIs off Ply system4Receiver for wireless remote Is blinking3Upward/downward vane Performance failurePage Vane motor MV Connect to the indoor controller board CN2D Test Point DiagramBetween 1 to 3 12.6-13.7V DC Pin1 + PCA-A36GA PCA-A36GA1 Functions of DIP Switch and Jumper Wire ModelsDisassembly Procedure Operating Procedure Photos & IllustrationsRemoving the air intake grille Removing the electrical boxOperating Procedure Removing the fan motor MFRemoving the sirocco fan Remove the air intake grilleOperating Procedure Photos Removing the vane motor MVRemoving the Indoor coil thermistor TH2/TH5 Removing the Under panelRemoving the drain pan Removing the guide vaneRemove the intake grille. See the figure Removing the Auto vaneRemoving the heat exchanger Parts No Parts Name Specifications Drawing NoR01 29J 130 R01 35J 130Structural Part PCA-A24GA PCA-A30GA PCA-A36GA PCA-A42GA Electrical Parts PCA-A24GA PCA-A30GA PCA-A36GA PCA-A42GA Parts Name Specifications RoHSRemarks Parts NoStructural Part PCA-A24GA1PCA-A30GA1PCA-A36GA1PCA-A42GA1 RoHS Qty/ set Wiring RecomElectrical Parts PCA-A24GA1PCA-A30GA1PCA-A36GA1PCA-A42GA1

PCA-A24GA specifications

Mitsubishi Electronics has long been a pioneer in the field of industrial automation, and the PCA-A24GA is a notable addition to its line of high-performance programmable controllers. This compact yet powerful device is designed to optimize processes and increase efficiency across various applications, making it a preferred choice for industries ranging from manufacturing to building automation.

One of the standout features of the PCA-A24GA is its versatility. The controller offers a wide range of input/output (I/O) options, enabling seamless integration with various sensors and actuators. With 24 digital input channels and 16 relay output channels, the PCA-A24GA can handle complex control tasks while maintaining a compact footprint. This flexibility is further enhanced by its support for analog inputs and outputs, allowing for greater precision in monitoring and controlling processes.

The PCA-A24GA is built with cutting-edge technologies that ensure robust performance. It employs Mitsubishi's advanced processing algorithms, which enhance real-time data processing capabilities. This ensures responsive control, reducing lag and improving overall system performance. Additionally, the controller features an intuitive programming environment, making it accessible to both seasoned engineers and those new to automation programming.

Communications are another strong suit of the PCA-A24GA. It offers multiple communication protocols, including Ethernet and RS-232, which allow for easy connectivity to various devices and systems. This ensures that the PCA-A24GA can be integrated into existing networks without significant modifications, facilitating smoother transitions and upgrades.

In terms of reliability and durability, the PCA-A24GA excels. Designed to operate in demanding environments, it is built to withstand temperature fluctuations, vibrations, and dust, which is essential for industrial settings. The controller's long operational life reduces maintenance costs and downtime, contributing to improved productivity.

Energy efficiency is also a key characteristic of the PCA-A24GA. Mitsubishi Electronics has designed this controller with eco-friendly technologies, making it suitable for organizations looking to reduce their carbon footprint while maintaining high levels of productivity.

In summary, the Mitsubishi Electronics PCA-A24GA stands out with its versatile I/O options, advanced processing capabilities, comprehensive communication protocols, and robust build. These features make it an excellent choice for industries seeking reliable and efficient automation solutions, securing Mitsubishi's reputation as a leader in the field.
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