Diagnosis/Process flowchart

Item

Contents

Summary

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Check

Check winding resistance

 

 

 

A

 

 

 

 

B

 

between phases of compres-

 

 

 

 

 

 

 

 

sor, and resistance between

 

 

 

 

 

 

 

 

 

 

 

 

 

 

outdoor frames by using a

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

tester.

 

 

 

 

 

 

 

 

 

 

 

 

 

• Is not grounded.

OK if 10Mor more

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Replace control

 

 

 

 

 

 

 

 

board assembly.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

• Is not short-circuited

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

OK if 0.51Ω → 0.57

 

 

 

 

 

 

 

 

 

 

 

 

 

between windings.

(Check by a digital tester.)

 

 

Check

NG

 

 

 

 

• Winding is not opened.

 

 

 

compressor

 

 

 

 

winding

 

 

 

 

 

 

 

 

 

 

 

 

resistance.

 

 

 

 

 

 

 

 

 

 

 

 

 

OK

 

 

 

 

 

 

 

Operation

Remove connector CN300 of

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

the outdoor fan motor, turn

 

 

 

 

 

 

 

 

 

 

 

 

 

 

on the power supply breaker,

 

 

 

Replace

 

 

 

 

 

Replace

 

and perform the operation.

 

 

 

control board.

 

 

 

 

 

compressor.

 

(Stops though activation is

 

 

 

 

 

 

 

 

 

 

 

 

 

 

prompted.)

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Check operation within 2 minutes 20 seconds after activation stopped.

11-9. How to Check Simply the Main Parts

11-9-1. How to Check the P.C. Board (Indoor Unit)

(1)Operating precautions

1)When removing the front panel or the P.C. board, be sure to shut off the power supply breaker.

2)When removing the P.C. board, hold the edge of the P.C. board and do not apply force to the parts.

3)When connecting or disconnecting the connectors on the P.C. board, hold the whole housing. Do not pull at the lead wire.

(2)Inspection procedures

1)When a P.C. board is judged to be defective, check for disconnection, burning, or discoloration of the copper foil pattern or this P.C. board.

2)The P.C. board consists of the following 2 parts

a.Main P.C. board part :

DC power supply circuit (5V, 12V, 15V), Indoor fan motor control circuit, CPU and peripheral circuits, buzzer, and Driving circuit of louver.

b.Indication unit of infrared ray receiving infrared ray receiving circuit, LED : To check defect of the P.C. board, follow the procedure described below.

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Toshiba RAS-10SAVP-E How to Check Simply the Main Parts, How to Check the P.C. Board Indoor Unit, Operating precautions

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