Directed Electronics 9405T Wartungshandbuch PDF herunterladen (Seite 24)

Troubleshooting

5-3

Samsung Electronics

5-3-2 When the Indoor Fan Motor does not Operate.

1) Checkpoints

(1) Is the voltage of the power source normal?(AC 187V-AC 253V)

(2) Is the indoor fan connector (CN71) in good contact?

(3) Is the starting condensor of the fan motor in good contact with the terminal?

(4) Is the resistance at both ends of the relay coil approximately 400L?

2) Checking pro c e d u res(after checking the checkpoints of clause 1)

Turn off the power, and then turn it on in 5 seconds.

Then the indoor fan motor is norm a l .

Then the relay is normal.

Then check and replace the IC3.

Then check and replace the MICOM(IC1).

Then check the wiring harness for open.

Is it low when checking

the output wave for

each airflow at the IC3

pin No. 11, 12,

and 13?

Then replace the relay when resistance is 0¥ or i

Check the resistance level after

t u r ning off the power.

Operate the on/off button, and operation mode key, and place

it in the “FAN” position.

Does the airflow volume of the indoor fan motor change

when converting into high, medium, and low by the FAN

speed key?

Do the RY3(high), RY4(medium), and RY5(low) operate

when converting into high medium and low by the FAN

speed key.

Do the RY3(high), RY4(medium), and RY5(low) operate

when converting into high medium and low by the FAN

speed key.

Is the resistance at both ends/of the relay(RY 3, 4, 5) coil

approximately 400L?

Is it “high” when checking the output wave for airflow at

the MICOM(IC1) pin No. 54, 55, and 56?

Is the voltage at both ends of the relay for each airflow at

the time of selecting the fan speed(high/medium/low) DC

12V?

Is the voltage at both ends/of indoor fan motor AC 220V?

Check and replace the indoor fan motor.

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