Mitsubishi Electronics PKA-A30KA4.TH, PKA-A36KA4.TH Remove the room temperature thermistor

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OPERATION PROCEDURE

PHOTOS

 

8. REMOVING THE HEAT EXCHANGER

Photo 11

 

 

Heat exchanger

Water cut

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

(2)Remove the electrical box (Refer to step 3) and the nozzle

assembly (Refer to step 4).

(3)Remove the water cut.

(4)Remove the pipe thermistors from each holder.

(5)Disconnect the connector for ground wire.

(6)Remove 3 screws fixing the left side of the heat exchanger. (See Photo 9)

(7)Remove the heat exchanger.

Photo 12

Lead wire for TH5

Connector for

 

ground

Heat exchanger

Liquid pipe thermistor (TH2)

9. REMOVING THE ROOM TEMPERATURE THERMISTOR

Photo 13

(1)

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

 

 

 

(2)

Remove the electrical box covers.

 

 

Indoor controller

(3)

Remove the room temperature thermistor.

 

 

 

 

board (I.B.)

(4)

Disconnect the connector (CN20) on the indoor controller

 

 

 

 

 

 

board.

 

 

 

 

 

 

 

Room temp.

 

 

 

 

thermistor (TH1)

HEAD OFFICE : TOKYO BLDG., 2-7-3, MARUNOUCHI, CHIYODA-KU, TOKYO 100-8310, JAPAN

CCopyright 2010 MITSUBISHI ELECTRIC ENGINEERING CO., LTD. Distributed in May 2011 No.OCH488 REVISED EDITION-A Distributed in Nov. 2010 No.OCH488

Made in Japan

New publication, effective May 2011 Specifications subject to change without notice

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Contents Parts Catalog OCB488 ContentsRevised EDITION-A Remote controller Optional parts Reference ManualSafety Precaution Always Observe for SafetyFront grille When charging directly from cylinderPart Names and Functions Display Section Operation SectionOperation Mode display Mode Select buttonTemperature setting display Timer displaySpecifications Service RefNoise Criterion Curves PKA-A24KA4.THPKA-A30KA4.TH PKA-A24KAL PKA-A30KALUnit inch mm Outlines and DimensionsPKA-A24KA4.TH PKA-A30KA4.TH PKA-A36KA4.TH Wiring Diagram Explanation of symbolsRefrigerant System Diagram Heat exchangerAccording to 9-4. Troubleshooting by inferior phenomena TroubleshootingTroubleshooting MALFUNCTION-DIAGNOSIS Method by Remote Controller ProcedureWired remote controller Case of trouble during operationU9,UH Wired remote controller LED 1, 2 PCB in outdoor unit Unit’s power terminal block L1, L2, GRAppear even when operation Remote controller wire shortSELF-DIAGNOSIS Action Table Pipe temperature OperatingCause Countermeasure Pipe temperature thermistor Remote controller transmissionErrorE0/signal receiving errorE4 Condenser-Evaporator TH5Error Signal receiving error Error Transmitting errorRemote controller control board Indoor/outdoor unit communicationTroubleshooting by Inferior Phenomena Phenomena Cause Countermeasure 1Upward/downward vanePerformance failure ControllerWhen the remote controller cannot be used Emergency OperationHeat pump type Cooling Only typeLower temperature Condenser/evaporator temperatureThermistor Thermistor TH5Sensor signal check DC Fan motor fan motor/indoor controller circuit boardTest Point Diagram Functions of DIP Switch and Jumper Wire Special Function OperationRotation function and Back-up function Outline of functions System constraintRequest Code List Rotation setting2nd stage cut-in setting 2nd unit Cut-outHow to connect Setting method of each function by wired remote controllerBACK-UP Heating Function CN152 Outline of functionsDisassembly Procedure Operation Procedure Photos & IllustrationsBe careful when removing heavy parts PhotoVane Motor and Drain Hose Operation Procedure PhotosRemoving the Nozzle Assembly with Vane Disconnect the connector CN44 on the indoor controller Remove the panel and the corner box. Refer to stepRemove the screw fixing motor band. See Photo Remove the liquid pipe thermistor and cond / eva thermistorRemove the room temperature thermistor Disconnect the connector CN20 on the indoor controller Board

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.