Mitsubishi Electronics PCA-A24GA Test Point Diagram, Between 1 to 3 12.6-13.7V DC Pin1 +

Page 23

<Thermistor Characteristic graph>

< Thermistor for lower temperature >

Thermistor for

Room temperature thermistor(TH1)

lower temperature

Pipe temperature thermistor(TH2)

 

Condenser/evaporator temperature

 

thermistor(TH5)

 

 

 

Thermistor R0=15kΩ ± 3%

 

 

 

 

 

 

 

Fixed number of B=3480 ± 2%

 

 

 

 

 

 

 

t(:):Rt=15exp { 3480(

 

1

 

 

 

 

1

 

 

) }

 

 

273+t

273

 

 

 

 

 

 

 

 

 

 

1

 

 

 

 

 

 

 

1

 

T(˚F):Rt=15exp { 3480(

 

 

 

 

 

 

 

 

) }

273+ T-32

 

 

 

 

273

 

 

1.8

 

 

 

 

 

 

 

 

0: (32˚F)

 

 

15kΩ

 

 

 

 

 

 

 

10: (50˚F)

 

9.6kΩ

 

 

 

 

 

 

 

20: (68˚F)

 

6.3kΩ

 

 

 

 

 

 

 

25: (77˚F)

 

5.4kΩ

 

 

 

 

 

 

 

30: (86˚F)

 

4.3kΩ

 

 

 

 

 

 

 

40:(104˚F)

 

3.0kΩ

 

 

 

 

 

 

 

Resistance (k")

50

40

30

20

10

0

-20 -10 0 10 20 30 40 50 :

-4 -14 32 50 68 86 104 122 ˚F

Temperature

10-6.TEST POINT DIAGRAM

10-6-1. Power board

 

 

PCA-A24GA PCA-A30GA

PCA-A36GA

PCA-A42GA

PCA-A24GA1PCA-A30GA1

PCA-A36GA1

PCA-A42GA1

 

 

CN2S

 

 

Connect to the indoor controller board (CN2D)

 

 

Between 1 to 3 12.6-13.7V DC (Pin1 (+))

CNSK

Connect to the indoor controller board (CNDK)

Between 1 to 3 208/230V AC

23

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Contents PCA-A30GA ContentsRevised EDITION-B PCA-A24GAReference Manual Technical Data BookTechnical Changes Always Observe for Safety Safety PrecautionAdditional refrigerant charge When charging directly from cylinderIndoor Unit Part Names and FunctionsDisplay Section Timer display Operation Mode displayMode Select button Temperature setting displayPCA-A36GA, PCA-A36GA1Single phase, 60Hz, 208/230V SpecificationsService Ref PCA-A30GA, PCA-A30GA1Single phase, 60Hz, 208/230VPCA-A36GA1 Noise Criterion CurvesPCA-A24GA1 PCA-A30GA1PCA-A24GA PCA-A24GA1 PCA-A30GA PCA-A30GA1 Outlines and DimensionsUnit inchmm PCA-A36GA PCA-A42GA PCA-A36GA1 PCA-A42GA1Indoor unit Installation Manual Wiring DiagramHeat exchanger Refrigerant System DiagramTroubleshooting TroubleshootingSELF-DIAGNOSIS Action Table Working Pipe temperatureCause Countermeasure Freezing/overheating protection is ErrorE3/signal receiving errorE5 Cause Countermeasure Pipe temperature thermistorRemote controller transmission ErrorE0/signal receiving errorE4Indoor controller board Error Signal receiving errorError Transmitting error Remote controller control boardPly system Troubleshooting by Inferior PhenomenaPhenomena Cause Countermeasure Is off Performance failure 4Receiver for wireless remote Is blinking 3Upward/downward vanePage Vane motor MV Connect to the indoor controller board CN2D Test Point DiagramBetween 1 to 3 12.6-13.7V DC Pin1 + PCA-A36GA PCA-A36GA1 Models Functions of DIP Switch and Jumper WireRemoving the electrical box Disassembly ProcedureOperating Procedure Photos & Illustrations Removing the air intake grilleRemove the air intake grille Operating ProcedureRemoving the fan motor MF Removing the sirocco fanRemoving the Under panel Operating Procedure PhotosRemoving the vane motor MV Removing the Indoor coil thermistor TH2/TH5Removing the Auto vane Removing the drain panRemoving the guide vane Remove the intake grille. See the figureRemoving the heat exchanger R01 35J 130 Parts No Parts Name SpecificationsDrawing No R01 29J 130Structural Part PCA-A24GA PCA-A30GA PCA-A36GA PCA-A42GA Electrical Parts PCA-A24GA PCA-A30GA PCA-A36GA PCA-A42GA Parts No Parts Name SpecificationsRoHS RemarksStructural Part PCA-A24GA1PCA-A30GA1PCA-A36GA1PCA-A42GA1 RoHS Qty/ set Wiring RecomElectrical Parts PCA-A24GA1PCA-A30GA1PCA-A36GA1PCA-A42GA1
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