Toshiba RAS-13UKV-E2, RAS-13UAV-E2 How to Check Simply the Main Parts, Inspection procedures

FILE NO. SVM-03008

Diagnosis/Process flowchart

Item

Contents

Summary

A

B

C

Check

Check winding resistance

between phases of

compressor, and resistance

between outdoor frames by

Check

NG

using a tester.

→

OK if 10MΩ

or more →

•

Is not grounded.

winding of

compressor.

•

Is not short-circuited

}

OK if 0.51Ω

→ 0.57Ω

between windings.

(Check by a digital tester.)

OK

•

Winding is not opened.

Check

Replace

NG

fan motor

com-

Operation

Remove connector CN300 of

position

pressor.

the outdoor fan motor, turn on

detect

signal.

the power breaker, and

OK

perform the operation. (Stops

though activation is

Replace

prompted.)

outdoor

Check operation within 2

fan

minutes 20 seconds after

motor.

activation stopped.

<Output check of fan motor

a) One or two of three

Replace control

position detect signal>

voltages should be 5 V,

board assembly.

While connecting connector

and others should be 0V.

5P (CN301) for position

(When all are 0V or 5 V,

Check

detection, using a tester,

it is not accepted.)

NG

measure voltage between

b) When rotating the fan

compressor

winding

1-5. Between 5-4 : 5 V

slowly with hands, the

resistance.

voltage between pins

OK

should move from 0V to 5 V.

(Check it with an analog

Replace

Replace

tester.)

control board.

compressor.

10-8. How to Check Simply the Main Parts

10-8-1. 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 connec- tors 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 discolora- tion 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 (5 V, 12 V, 15 V), 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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