Mitsubishi Electronics PCA-A24GA Troubleshooting by Inferior Phenomena, Is off, Ply system

Page 19

10-3. TROUBLESHOOTING BY INFERIOR PHENOMENA

Note: Refer to the manual of outdoor unit for the detail of remote controller.

Phenomena

Cause

Countermeasure

(1)LED2 on indoor controller board • When LED1 on indoor controller board is also off.

 

is off.

1 Power supply of rated voltage is not supplied to out-

1 Check the voltage of outdoor power

 

door unit.

supply terminal block (L1,L2).

 

 

• When AC 208/230V is not detected,

 

 

check the power wiring to outdoor unit

 

 

and the breaker.

 

 

• When AC 208/230V is detected,

 

 

check 2 (below).

 

2 Defective outdoor controller circuit board

2 Check the voltage between outdoor

 

 

terminal block S1 and S2.

 

 

• When AC 208/230V is not detected.

 

 

—Check the fuse on outdoor controller

 

 

circuit board.

 

 

—Check the wiring connection.

 

 

• When AC 208/230V is detected,

 

 

check 3 (below).

 

3 Power supply of 208/230V is not supplied to indoor

3 Check the voltage between indoor terminal

 

unit.

block S1 and S2.

 

 

• When AC 208/230V is not detected,

 

 

check indoor/outdoor unit connecting

 

 

wire for mis-wiring.

 

 

• When AC 208/230V is detected,

 

 

check 4 (below).

 

4 Defective indoor power board

4 Check voltage output from CN2S on indoor

 

 

power board (DC13.1V). Refer to 10-6-1.

 

 

• When no voltage is output, check the

 

 

wiring connection.

 

 

• When output voltage is between

 

 

DC12.5V and DC13.7V, check 5

 

 

(below).

 

5 Defective indoor controller board

5 Check the wiring connection between

 

 

indoor controller board and indoor power

 

 

board. Check the fuse on indoor controller

 

 

board. If no problems are found, indoor

 

 

controller board is defective.

(For the separate indoor/outdoor unit power sup-

 

ply system)

1 Check the voltage of indoor power supply

1 Power supply of 208/230V AC is not supplied to

indoor unit.

terminal block (L1,L2).

 

• When AC208/230V is not detected,

 

check the power supply wiring.

 

• When AC208/230V is detected, check

 

2 (below).

2 The connectors of the optional replacement kit are

2 Check that there is no problem in the

not used.

method of connecting the connectors.

 

• When there are problems in the method

 

of connecting the connectors, connect

 

the connector correctly referring to instal-

 

lation manual of an optional kit.

 

• When there is no problem in the

 

method of connecting the connectors,

 

check 3 (below).

3 Defective indoor controller board

3 Check voltage output from CNDK on

 

indoor controller board.

 

• When AC208/230V is not detected.

 

—Check the fuse on indoor controller board.

 

—Check the wiring connection between

 

indoor power supply terminal block and

 

CND on indoor controller board.

 

• When AC208/230V is detected, check

 

4 (below).

4 Defective indoor power board

4 Check voltage output from CN2S on

 

indoor power board.

 

• When no voltage output, check the

 

wiring connection between CNDK on

 

indoor controller board and CNSK on

 

indoor power board.

 

If no problem are found, indoor power

 

board is defective.

 

• When DC12.5~13.7V is detected,

 

check the wiring connection between

 

CN2S on indoor power board and

 

CN2D on indoor power board.

 

If no problem are found, indoor con-

 

troller board is defective.

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Contents PCA-A30GA ContentsRevised EDITION-B PCA-A24GATechnical Changes Technical Data BookReference Manual 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 Cause Countermeasure Freezing/overheating protection is Pipe temperature Working 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 offPerformance failure 4Receiver for wireless remoteIs blinking 3Upward/downward vanePage Vane motor MV Between 1 to 3 12.6-13.7V DC Pin1 + Test Point DiagramConnect to the indoor controller board CN2D 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 Electrical Parts PCA-A24GA1PCA-A30GA1PCA-A36GA1PCA-A42GA1 Wiring RecomRoHS Qty/ set
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