Toshiba RAS-13YKV-E, RAS-10YKV-E, RAS-10YAV-E, RAS-13YAV-E How to Diagnose Trouble in Outdoor Unit

10-7. How to Diagnose Trouble in Outdoor Unit

10-7-1. Summarized Inner Diagnosis of Inverter Assembly

Diagnosis/Process flowchart

Item

Contents

Summary

Preparation

Turn “OFF” the power breaker,

Remove

and remove 3P connector

connector of

which connects inverter and

compressor.

compressor.

If fuse was blown, be sure to

Check 25A fuse

NG

Check

• Check whether 25A fuse on

check the electrolytic

the control board assembly

capacitor and diode block.

(Part No.F01).

is blown or not. (F01)

(DB01)

OK

Replace fuse.

•

Connect discharge

resistance (approx.

Check

100Ω 40W) or soldering

electrolytic

iron (plug) between +, –

capacitor, diode

Check

Check whether 15A fuse on

terminals of the electro-

block (DB01),

etc.

the control board assembly

lytic capacitor (500µF) of

is blown or not. (F03)

C14 (with printed CAU-

TION HIGH VOLTAGE) on

P.C. board.

Check

• 15A fuse (F03) on the

NG

control board is provided for

15A fuse

power factor improvement

Discharging position

Plug of

(Part No.F03).

soldering

control circuit. The operation

(Discharging period

iron

10 seconds or more)

OK

Replace control

continues even if fuse is

board assembly.

blown.

Check

NG

terminal voltage

of electrolytic

capacitor.

OK

Check

electrolytic

If 15A fuse is blown,

capacitor, diode

discharge both edges of

(DB01),

etc.

the electrolytic capacitor

with soldering iron.

Operation

Turn on power breaker, and

operate the air conditioner in

OK if 500µF →

Does outdoor

NO

COOL mode by short-circuit of

the timer.

DC280 to 320V

fan rotate?

Measurement

Measure terminal voltage of

YES

the electrolytic capacity.

Does LED on control

YES

Remove CN300 while

board flash or go on?

500µF:400WV x 3

pushing the part indicated

NO

by an arrow because CN01

After operation, turn off the

is a connector with lock.

Remove connector

Check

power breaker after 2 minutes

NG

CN300 of outdoor fan

20 seconds passed, and

motor, and using a

Stop

tester, check resistance

discharge the electrolytic

value between every

capacity by soldering iron.

phases at motor side.

Check voltage between motor

OK

Check

phases.

Measurement

• Is not winding between Q-

Replace

→

R, R-S, or Q-Sopened

Resistance between

outdoor

fan motor.

or short-circuited?

phases should be approx. 55

• Is not frame grounded with

to 77Ω

A

Q, R, or S?

B

C

→

Should be 10MΩ or more.

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