Mitsubishi Electronics PKA-A30KA4.TH Disassembly Procedure, Photo, Front grille Screws

Page 29

11 DISASSEMBLY PROCEDURE

PKA-A24KA4.TH PKA-A30KA4.TH

PKA-A36KA4.TH

 

 

 

 

 

 

 

Be careful when removing heavy parts.

 

 

 

 

 

 

 

 

 

 

 

 

 

OPERATION PROCEDURE

PHOTOS & ILLUSTRATIONS

 

 

 

 

 

 

 

1. REMOVING THE PANEL

 

 

 

 

 

 

Photo 1

 

Front grille

 

Screws

(1) Press and unlock the knobs on both sides of the front grille and lift the front grille until it is level. Pull the hinges forward to remove the front grille. (See Photo 1)

(2) Remove 3 screw caps of the panel. Remove 5 screws. (See Photo 1)

(3)

Unfix 3 hooks. (See Figure 1)

 

 

 

(4)

Hold the lower part of both ends of the panel and pull it

 

 

 

 

slightly toward you, and then remove the panel by pushing

 

 

 

 

 

 

 

 

it upward.

 

 

 

(5) Remove the screw of the corner box. (See Photo 1)

 

 

Screw of the

 

Remove the corner box.

Screws and screw caps

 

corner box

Figure 1

Hooks

 

2. REMOVING THE INDOOR CONTROLLER BOARD

Photo 2

 

Screw of electrical

AND THE WIRELESS CONTROLLER BOARD

 

Water Cut

box cover (side)

 

 

 

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

 

 

 

(2) Remove the front and side electrical box covers (each 1

 

 

 

screw). (See Photo 2)

 

 

 

(3) Disconnect the connectors on the indoor controller board.

 

 

 

(See Photo 3)

 

 

 

(4) Remove the switch board holder and open the cover.

 

 

 

(5) Pull out the indoor controller board toward you then

 

 

 

remove the indoor controller board and switch board. (See

 

 

Switch board

Photo 3)

 

 

holder

(6) Remove the holder of IR wireless remote controller board.

Screw of electrical

Holder of IR wireless

(7) Disconnect the connector of IR wireless remote control-

box cover (Front)

remote controller board

ler board and remove the IR wireless remote controller

 

 

 

 

 

board from the holder.

Photo 3

Terminal block (TB4)

 

 

 

Indoor controller

 

Connector

 

board (I.B.)

 

 

 

 

for ground

 

Terminal block

 

wire

 

 

 

(TB2) (option)

 

 

 

 

 

 

Terminal block

 

Electrical

 

(TB5)

 

 

 

 

box

 

 

29

Image 29
Contents Parts Catalog OCB488 ContentsRevised EDITION-A Reference Manual Remote controller Optional partsAlways Observe for Safety Safety PrecautionFront grille When charging directly from cylinderPart Names and Functions Operation Section Display SectionMode Select button Operation Mode displayTemperature setting display Timer displayService Ref SpecificationsPKA-A24KA4.TH Noise Criterion CurvesPKA-A30KA4.TH PKA-A24KAL PKA-A30KALUnit inch mm Outlines and DimensionsPKA-A24KA4.TH PKA-A30KA4.TH PKA-A36KA4.TH Explanation of symbols Wiring DiagramHeat exchanger Refrigerant System DiagramAccording to 9-4. Troubleshooting by inferior phenomena TroubleshootingTroubleshooting Procedure MALFUNCTION-DIAGNOSIS Method by Remote ControllerWired remote controller Case of trouble during operationU9,UH Unit’s power terminal block L1, L2, GR Wired remote controller LED 1, 2 PCB in outdoor unitAppear even when operation Remote controller wire shortSELF-DIAGNOSIS Action Table Operating Pipe temperatureRemote controller transmission Cause Countermeasure Pipe temperature thermistorErrorE0/signal receiving errorE4 Condenser-Evaporator TH5Error Transmitting error Error Signal receiving errorRemote controller control board Indoor/outdoor unit communicationPhenomena Cause Countermeasure 1Upward/downward vane Troubleshooting by Inferior PhenomenaPerformance failure ControllerEmergency Operation When the remote controller cannot be usedHeat pump type Cooling Only typeCondenser/evaporator temperature Lower temperatureThermistor Thermistor TH5DC Fan motor fan motor/indoor controller circuit board Sensor signal checkTest Point Diagram Functions of DIP Switch and Jumper Wire Operation Special FunctionRotation function and Back-up function Outline of functions System constraintRotation setting Request Code List2nd stage cut-in setting 2nd unit Cut-outSetting method of each function by wired remote controller How to connectBACK-UP Heating Function CN152 Outline of functionsOperation Procedure Photos & Illustrations Disassembly ProcedureBe careful when removing heavy parts PhotoVane Motor and Drain Hose Operation Procedure PhotosRemoving the Nozzle Assembly with Vane Remove the panel and the corner box. Refer to step Disconnect the connector CN44 on the indoor controllerRemove the screw fixing motor band. See Photo Remove the liquid pipe thermistor and cond / eva thermistorDisconnect 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.