Mitsumi electronic PKA-A18HA4 Disassembly Procedure, Operation Procedure Photos & Illustrations

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11

DISASSEMBLY PROCEDURE

 

PKA-A12HA4 PKA-A18HA4

Be careful when removing heavy parts.

 

OPERATION PROCEDURE

PHOTOS & ILLUSTRATIONS

1. REMOVING THE LOWER SIDE OF THE INDOOR

Figure 1

 

UNIT FROM THE INSTALLATION PLATE

 

(1) Remove the front panel.

 

 

(2) Insert the screw driver to the corner hole at both left and

 

 

 

right side as shown in the figure 1.

 

Push

(3) Push it up, then pull down the lower side of indoor unit and

 

 

remove the hook.

 

 

 

 

 

Corner hole

 

 

Be careful

 

 

 

not to damage

 

 

the airflow

 

 

 

adjustment

 

 

 

plate with the

Push Down

 

 

screw driver.

2. REMOVING THE FRONT PANEL

Photo 1

 

(1)

Press and unlock the knobs on both sides of the front

 

 

 

 

panel and lift the front panel until it is level. Pull the hinges

Vanes

Front panel

 

forward to remove the front panel. (See Photo 2)

 

 

 

(2)

Move the horizontal vanes in a downward direction.

 

 

(3)

Remove the screw caps of the panel. Remove the screws.

 

 

 

(See Photo 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.

Screw caps

Photo 2

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Contents Parts Catalog OCB483 ContentsRemote controller Optional parts Service Ref PUZ-A18/24/36NHA4Reference Manual PUZ-A18/24/36NHA4-BS PUY-A12/18/24/36NHA4Always Observe for Safety Safety PrecautionPart Names and Functions Refrigerant recovery equipmentOperation Section Display SectionMode Select button Operation Mode displayTemperature setting display Timer displayService Ref SpecificationsPKA-A12HA4 PKA-A18HA4 Noise Criterion CurvesUnit inch mm Outlines and DimensionsTB5 Wiring DiagramHeat exchanger Refrigerant System DiagramTroubleshooting TroubleshootingCase of trouble during operation MALFUNCTION-DIAGNOSIS Method by Remote ControllerWired remote controller U9,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 typeLower temperature HOW to Check the Parts PKA-A12HA4 PKA-A18HA4Condenser/evaporator temperature ThermistorSensor signal check Test 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 ProcedurePhoto Forward to remove the front panel. See PhotoOperation Procedure Photos Vane Motor and Drain Hose Operation ProcedureRemoving the Nozzle Assembly with Vane Photo Disconnect the connector CN20 on the indoor controller Remove the room temperature thermistorRemove the electrical box cover BoardPage Page Page New publication, effective Nov

PKA-A18HA4, PKA-A12HA4 specifications

Mitsumi Electric Company is known for its innovations in the electronic components sector, and among its noteworthy products are the PKA-A18HA4 and PKA-A12HA4 components. Both models represent advancements in their respective categories, characterized by reliability, high performance, and cutting-edge technology.

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