Mitsumi electronic PKA-A12HA4, PKA-A18HA4 service manual Operation Procedure Photos

Page 30

 

OPERATION PROCEDURE

 

 

 

PHOTOS

3. REMOVING THE INDOOR CONTROLLER BOARD

Photo 3

 

AND IR WIRELESS CONTROLLER BOARD

Screw (top cover)

Screw (side cover) Electrical box

(1)

Remove the front panel. (Refer to step 2)

cover (top)

 

 

 

Electrical box

(2)

Remove the room temp. thermistor TH1. (see Photo 3)

 

 

 

 

 

 

cover (side)

(3)

Remove the electrical box covers (screw 4 × 12).

 

 

 

 

 

 

 

(See Photo 3)

 

 

 

Room temp.

(4)

Disconnect the connectors on the indoor controller board.

 

 

 

thermistor

(5)

Remove the switch board cover.

 

 

 

(TH1)

(6)

Pull out the indoor controller board toward you, then

 

 

 

Thermistor

 

disconnect the rest of connectors.

 

 

 

holder

 

Remove the indoor controller board and switch board.

 

 

 

Screw

(7)

Remove the holder of IR wireless controller board.

 

 

 

(8)

Disconnect the connector of IR wireless controller board

 

 

 

(side cover)

 

and remove the IR wireless controller board from the

Nozzle assembly

Switch holder Holder of IR wireless

 

holder.

 

 

 

 

controller board

 

 

Photo 4

Indoor controller board (I.B)

 

 

 

 

 

 

 

 

Terminal

 

 

 

 

 

block (TB4)

 

 

Fixture (right)

4. REMOVING THE ELECTRICAL BOX

Photo 5

 

(1) Remove the front panel. (Refer to step 2)

Connector for

Fixture

ground wire

(upper)

(2)Remove the electrical box covers. (See Photo 3)

(3)Remove the nozzle assembly. (Refer to step 5)

(4) Disconnect the connecting wire from terminal block (TB4) and terminal block for MA-remote controller (TB5).

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

(6)Disconnect the connector for the ground wire. (See Photo 5)

(7)Pull the disconnected lead wire out from the electrical box.

(8)Remove the screw of electrical box. (See Photo 6)

(9)Push up the upper fixture (See Photo 5) catch to remove the box, then pull the right fixture (See Photo 4) and

remove it from the box fixture.

Photo 6

Terminal

 

 

block (TB4)

 

 

Terminal

 

 

block (TB5)

 

 

Screw

 

 

(Electrical box)

30

Image 30
Contents Contents Parts Catalog OCB483Reference Manual Service Ref PUZ-A18/24/36NHA4Remote controller Optional parts PUZ-A18/24/36NHA4-BS PUY-A12/18/24/36NHA4Safety Precaution Always Observe for SafetyRefrigerant recovery equipment Part Names and FunctionsDisplay Section Operation SectionTemperature setting display Operation Mode displayMode Select button Timer displaySpecifications Service RefNoise Criterion Curves PKA-A12HA4 PKA-A18HA4Outlines and Dimensions Unit inch mmWiring Diagram TB5Refrigerant System Diagram Heat exchangerTroubleshooting TroubleshootingMALFUNCTION-DIAGNOSIS Method by Remote Controller Wired remote controllerCase of trouble during operation U9,UH Appear even when operation Wired remote controller LED 1, 2 PCB in outdoor unitUnit’s power terminal block L1, L2, GR Remote controller wire shortSELF-DIAGNOSIS Action Table Pipe temperature OperatingErrorE0/signal receiving errorE4 Cause Countermeasure Pipe temperature thermistorRemote controller transmission Condenser-Evaporator TH5Remote controller control board Error Signal receiving errorError Transmitting error Indoor/outdoor unit communicationPerformance failure Troubleshooting by Inferior PhenomenaPhenomena Cause Countermeasure 1Upward/downward vane ControllerHeat pump type When the remote controller cannot be usedEmergency Operation Cooling Only typeCondenser/evaporator temperature HOW to Check the Parts PKA-A12HA4 PKA-A18HA4Lower temperature ThermistorSensor signal check Test Point Diagram Functions of DIP Switch and Jumper Wire Rotation function and Back-up function Outline of functions Special FunctionOperation System constraint2nd stage cut-in setting Request Code ListRotation setting 2nd unit Cut-outBACK-UP Heating Function CN152 How to connectSetting method of each function by wired remote controller Outline of functionsPhoto Disassembly ProcedureOperation Procedure Photos & Illustrations Forward to remove the front panel. See PhotoOperation Procedure Photos Operation Procedure Removing the Nozzle Assembly with Vane PhotoVane Motor and Drain Hose Remove the electrical box cover Remove the room temperature thermistorDisconnect the connector CN20 on the indoor controller 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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