Mitsumi electronic PKA-A12HA4, PKA-A18HA4 service manual Test Point Diagram

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9-7. TEST POINT DIAGRAM

Indoor controller board

PKA-A12HA4 PKA-A18HA4

CN105

RFI

(Radio frequency interface)

SWE

Emergency operation connector

SW1

Model selection

SW2

Capacity setting

CN151

Connect to the vane motor (MV)

Jumper wire J41,J42

Pair No. setting for IR wireless remote controller

CN152

 

Connector

 

(Back-up heating)

CN20

 

Room temp. thermistor (TH1)

CN44

Pipe temperature thermistor 1-2 : Liquid (TH2)

3-4 : Condenser/Evaporator (TH5)

SWE2

Emergency operation switch

CN2L

CN41

Connector

Connector

(LOSSNAY)

(HA terminal-A)

CNMF

Connect to the fan motor (MF)

1-3 : DC294~325V

4-3 : DC15V

5-3 : DC0~6.5V

6-3 : DC0 or DC15V

CN01

Connect to the Terminal block (TB4) 1-3 : 208/230VAC

FUSE

(3.15A 250V)

{LED1:Power supply (I.B) LED2:Power supply (R.B) LED3:Transmission

(Indoor/outdodr)

CN3C

Transmission (Indoor/outdodr) (DC 0~24V)

CN22

Connect to the terminal block (TB5) (Remote controller connecting wire)

CN30

Connector (LLC)

CN32

Remote switch

CN90

Connect to the remote operation adapter

CN51

Centrally control

1-2 : Control signal

13VDC pulse input (1: +)

3-4 : Operation indicator 13VDC (3: +)

3-5 : Malfunction indicator 13VDC (3: +)

IR wireless remote controller board

24

Image 24
Contents Contents Parts Catalog OCB483Service Ref PUZ-A18/24/36NHA4 Remote controller Optional partsReference Manual PUZ-A18/24/36NHA4-BS PUY-A12/18/24/36NHA4Safety Precaution Always Observe for SafetyRefrigerant recovery equipment Part Names and FunctionsDisplay Section Operation SectionOperation Mode display Mode Select buttonTemperature setting display 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 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 typeHOW to Check the Parts PKA-A12HA4 PKA-A18HA4 Lower temperatureCondenser/evaporator temperature ThermistorSensor signal check Test 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 & IllustrationsPhoto 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 room temperature thermistor Disconnect the connector CN20 on the indoor controllerRemove 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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