Mitsubishi Electronics PKA-A24KA4.TH Remove the panel and the corner box. Refer to step, Board

Page 31

 

OPERATION PROCEDURE

 

PHOTOS

6. REMOVING THE INDOOR FAN MOTOR AND THE

Photo 7

Screw of the motor band

LINE FLOW FAN

 

 

(1)

Remove the panel and the corner box. (Refer to step 1)

 

Lead wire of pipe thermistor

(2)

Remove the electrical box (Refer to step 2) and the nozzle

 

 

assembly (Refer to step 3).

 

 

(3)

Remove the water cut. (See Photo 2)

 

 

(4)Remove the screw fixing the line flow fan. (See Photo 8)

(5)Remove 5 screws fixing the motor bed. (See Photo 7)

(6)

Remove the lead wire of pipe thermistor from the hook of

 

 

motor bed. (See Photo 7)

Screws of the motor bed

(7)

Remove the screw fixing motor band. (See Photo 7)

(8)

Remove the motor bed together with fan motor and motor

 

(9)

band.

 

Remove 3 screws fixing the left side of the heat exchanger.

 

 

(See Photo 9)

 

(10)Lift the heat exchanger, and pull out the line flow fan to the lower-left.

Photo 9

Photo 8

Screw of the line flow fan

Screws of the left side of the heat exchanger

7. REMOVING THE LIQUID PIPE THERMISTOR AND

Photo 10

COND / EVA PIPE THERMISTOR

 

(1)

Remove the panel and the corner box. (Refer to step 1)

Cond / eva

(2)

Remove the electrical box covers. (Refer to step 2)

thermistor (TH5)

(3)

Remove the water cut. (See Photo 2)

Liquid pipe

(4)

Remove the liquid pipe thermistor and cond / eva thermistor.

(5)

Disconnect the connector (CN44) on the indoor controller

thermistor (TH2)

 

board.

 

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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.