Mitsubishi Electronics PKA-A24KA4.TH Indoor/outdoor unit communication, Error Transmitting error

Page 19

Error Code

Abnormal point and detection method

Cause

Countermeasure

 

Remote controller transmission

 

 

 

error(E3)/signal receiving error(E5)

2 remote controllers are set as

Set a remote controller to main, and the

 

Abnormal if remote controller could not

“main.”

other to sub.

 

find blank of transmission path for 6 sec-

(In case of 2 remote con-

 

 

onds and could not transmit.

trollers)

Remote controller is connected with only one

 

(Error code: E3)

Remote controller is connected

 

Remote controller receives transmitted

with 2 indoor units or more.

indoor unit.

 

data at the same time, compares the

Repetition of refrigerant

The address changes to a separate setting.

 

data, and when detecting it, judges

address

~ Diagnose remote controller.

 

different data to be abnormal 30

Defective transmitting receiving

E3

continuous times. (Error code: E3)

a) When “RC OK” is displayed, remote con-

circuit of remote controller

or

 

trollers have no problem.

 

Defective transmitting receiving

Abnormal if indoor controller board could

Turn the power off, and on again to check.

E5

circuit of indoor controller board

 

not find blank of transmission path.

When becoming abnormal again, replace

 

(Error code: E5)

Noise has entered into trans-

indoor controller board.

 

Indoor controller board receives trans-

mission wire of remote control-

b) When “RC NG” is displayed, replace

 

mitted data at the same time, compares

ler.

remote controller.

 

the data,and when detecting it, judges

 

c) When “RC E3” or “ERC 00-66” is dis-

 

different data to be abnormal 30

 

played, noise may be causing abnormal-

 

continuous times. (Error code: E5)

 

ity.

 

 

 

 

 

Indoor/outdoor unit communication

Contact failure, short circuit or,

Check LED display on the outdoor control

 

error (Signal receiving error)

miswiring (converse wiring) of

circuit board. (Connect A-control service

 

Abnormal if indoor controller board

indoor/outdoor unit connecting

tool, PAC-SK52ST.)

 

cannot receive any signal normally for 6

wire

Refer to EA-EC item if LED displays EA-EC.

 

minutes after turning the power on.

Check disconnection or looseness of indoor/

 

Defective transmitting receiving

 

Abnormal if indoor controller board

outdoor unit connecting wire of indoor unit or

 

circuit of outdoor controller

 

cannot receive any signal normally for 3

outdoor unit.

 

circuit board

 

minutes.

Check all the units in case of twin indoor

E6

Consider the unit as abnormal under

Defective transmitting receiving

unit system.

the following condition: When 2 or more

circuit of indoor controller board

- Turn the power off, and on again to check.

 

indoor units are connected to an

Noise has entered into indoor/

If abnormality generates again, replace

 

outdoor unit, indoor controller board

outdoor unit connecting wire.

indoor controller board or outdoor

 

cannot receive a signal for 3 minutes

 

controller circuit board.

 

from outdoor controller circuit board, a

 

Other indoor controller board may have

 

signal which allows outdoor controller

 

defect in case of twin indoor unit system.

 

circuit board to transmit signals.

 

 

 

 

 

 

 

Indoor/outdoor unit communication

Defective transmitting receiving

- Turn the power off, and on again to check.

 

error (Transmitting error)

circuit of indoor controller board

If abnormality generates again, replace

 

Abnormal if indoor controller board

Noise has entered into power

indoor controller board.

E7

receives “1” 30 times continuously when

supply.

 

indoor controller board transmits “0” signal.

Noise has entered into outdoor

 

 

 

 

 

control wire.

 

 

 

 

 

 

Indoor controller board

Defective indoor controller

Replace indoor controller board.

 

Abnormal if data cannot be read normally

board

 

Fb

from the nonvolatile memory of the indoor

 

 

controller board.

 

 

 

 

 

 

 

Remote controller control board

Defective remote controller

Replace remote controller.

 

Abnormal if data cannot be read nor-

 

 

 

mally from the nonvolatile memory of the

 

 

 

remote controller control board.

 

 

 

(Error code: E1)

 

 

E1

Abnormal if the clock function of remote

 

 

or

 

 

controller cannot be operated normally.

 

 

E2

 

 

(Error code: E2)

 

 

 

 

 

 

 

 

 

19

Image 19
Contents Revised EDITION-A ContentsParts Catalog OCB488 Reference Manual Remote controller Optional partsAlways Observe for Safety Safety PrecautionPart Names and Functions When charging directly from cylinderFront grille Operation Section Display SectionTimer display Operation Mode displayMode Select button Temperature setting displayService Ref SpecificationsPKA-A24KAL PKA-A30KAL Noise Criterion CurvesPKA-A24KA4.TH PKA-A30KA4.THPKA-A24KA4.TH PKA-A30KA4.TH PKA-A36KA4.TH Outlines and DimensionsUnit inch mm Explanation of symbols Wiring DiagramHeat exchanger Refrigerant System DiagramTroubleshooting TroubleshootingAccording to 9-4. Troubleshooting by inferior phenomena Case of trouble during operation MALFUNCTION-DIAGNOSIS Method by Remote ControllerProcedure Wired remote controllerU9,UH Remote controller wire short Wired remote controller LED 1, 2 PCB in outdoor unitUnit’s power terminal block L1, L2, GR Appear even when operationSELF-DIAGNOSIS Action Table Operating Pipe temperatureCondenser-Evaporator TH5 Cause Countermeasure Pipe temperature thermistorRemote controller transmission ErrorE0/signal receiving errorE4Indoor/outdoor unit communication Error Signal receiving errorError Transmitting error Remote controller control boardController Troubleshooting by Inferior PhenomenaPhenomena Cause Countermeasure 1Upward/downward vane Performance failureCooling Only type When the remote controller cannot be usedEmergency Operation Heat pump typeThermistor TH5 Lower temperatureCondenser/evaporator temperature ThermistorDC Fan motor fan motor/indoor controller circuit board Sensor signal checkTest Point Diagram Functions of DIP Switch and Jumper Wire System constraint Special FunctionOperation Rotation function and Back-up function Outline of functions2nd unit Cut-out Request Code ListRotation setting 2nd stage cut-in settingOutline of functions How to connectSetting method of each function by wired remote controller BACK-UP Heating Function CN152Photo Disassembly ProcedureOperation Procedure Photos & Illustrations Be careful when removing heavy partsRemoving the Nozzle Assembly with Vane Operation Procedure PhotosVane Motor and Drain Hose Remove the liquid pipe thermistor and cond / eva thermistor Disconnect the connector CN44 on the indoor controllerRemove the panel and the corner box. Refer to step Remove the screw fixing motor band. See PhotoDisconnect the connector CN20 on the indoor controller Board Remove the room temperature thermistor

PKA-A36KA4.TH, PKA-A30KA4.TH, PKA-A24KA4.TH specifications

Mitsubishi Electronics introduces its PKA series of commercial air conditioners, comprising models PKA-A24KA4.TH, PKA-A30KA4.TH, and PKA-A36KA4.TH. These units are designed to meet the growing demand for energy-efficient and reliable climate control solutions in commercial spaces. Each model in the series is equipped with advanced features that set them apart in the competitive air conditioning market.

One of the main features of the PKA series is the innovative inverter technology. This technology enables the air conditioning units to adjust their cooling or heating output according to the indoor temperature, leading to significant energy savings. By operating at varying speeds rather than a constant rate, the inverter system provides a more consistent and comfortable environment while reducing energy consumption by up to 30% compared to traditional fixed-speed systems.

Another standout characteristic of the PKA-A24KA4.TH, PKA-A30KA4.TH, and PKA-A36KA4.TH models is their compact design. These units are designed for easy installation in various commercial settings while taking up minimal space. This is particularly beneficial for businesses looking to optimize their floor space without compromising climate control efficiency.

The PKA series features advanced filtration technology, including a highly efficient air purification system. This enhances indoor air quality by removing dust, allergens, and other airborne pollutants, creating a healthier environment for occupants. The inclusion of a self-cleaning function also contributes to maintenance ease, as the unit automatically cleans the heat exchanger, preventing dust buildup and ensuring efficient operation.

Mitsubishi's commitment to whisper-quiet operation is another critical feature of these models. They are engineered to operate at sound levels as low as 19 dB(A), making them ideal for environments where noise control is essential, such as offices, hotels, or healthcare facilities.

Moreover, the PKA series is compatible with Mitsubishi's sophisticated control systems, allowing users to manage their air conditioning remotely via smartphone or tablet. This level of control enhances user convenience and maximizes system efficiency by enabling real-time adjustments based on occupancy and other factors.

Overall, the Mitsubishi Electronics PKA-A24KA4.TH, PKA-A30KA4.TH, and PKA-A36KA4.TH units represent a perfect blend of modern technology and user-centric design, providing businesses with effective, efficient, and quiet climate control solutions. With their advanced features, energy-saving capabilities, and emphasis on air quality, these models stand out as premier choices for managing environmental comfort in commercial applications.