SAMSUNG P6091 Service Manual Troubleshooting

5. Trouble Diagnosis

As the micom washing machine is configured of a complicated structure, there might be a need for a service

♦

call. The information below is prepared for exact trouble diagnosis and suitable repair guide.

Caution for the Repair and Replacement

Please follow instructions below for trouble diagnosis and parts replacement.

1) As some electronic components are damaged by the charged static electricity from the resin part of wash machine or the human body, prepare the human body earth or remove the potential difference of the human body and wash machine by contacting the power supply plug when the work contacting to PCB is executed.

POWER SUPPLY PLUG

2) Since AC220~240V is applied to the triac T1 and T2 on P.C.B, the electric shock may occur by touching and be careful that the strong and weak electricity are not mixed.

3) If the P.C.B assembly is out of order, do not replace the component on P.C.B except TACT switch since the component is coated by the urethane.

4) As the P.C.B assembly is designed for easy handling, do not replace the P.C.B assembly by the wrong diagnosis and follow the procedure of trouble diagnosis when the micom is not operated normally.

5) As the parts on P.C.B are coated by the urethane, they can not be tested by the test bar of the meter. Check the trouble by the test mode method according to the procedure.

5-1. Trouble Diagnosis

No Item Cause and treatment

1 The power is not supplied - Is the PCB connector connected well?

- Is the voltage normal?

- Is the power supply plug connectedwell?

- Is the noise filter connectedwell?

- Is the secondary output of thepowersupply transformation normal?

- Is the fuse disconnected? (option) ï If above points are not found, the PCB assembly is outoforder.

Replace it.

2 The water is not supplied. - Is the knob open?

- Did you push START/PAUSE button after selecting the course?

- Is the water supply valve connected well?

- Is the winding of the water supply valve continuous?

- Is the connection and operation of the pressure switch normal? ï If above points are not found, the PCB assembly is outoforder.

Replace it.

3 The wash does not start though

the water supply is stopped.

4 The drum does not rotate during

washing.

5 Thewashisexecutedwhilethewater

is supplied.

6 The drum rotates in one direction

during washing. (The drum rotates in one direction forSPIN.)

7 Drainage problem. - Is the drainage hose bent?

8 Dehydration problem.

- Is the connection and operation of the pressure switch normal?

- Is the pressure switch hose damagedso that the air is leaked?

- Is the pressure switch hosebent?

- Check the operation of thewaterlevel switch. ï If above points are not found, the PCB assembly is outoforder.

Replace it.

- Is the belt connected well?

- Is the winding of the motor continuous? (Rotor winding, stator winding, generator)

- Is the motor protector normal?

ï If above points are not found, the PCB assembly is outoforder.

Replace it.

- The PCB assembly is outoforder. Replace it.

- The PCB assembly is outoforder. Replace it. (Inversion relay open trouble)

- Is the winding of the drainage pump continuous?

- Is the drain filter clogged by waste?

- If above points are not found,the PCB assembly is out of order. Replace it.

- Unbalance is detected.

- Put in the laundry uniformly and start again.

9 Abnormal noise during SPIN. - Is the pulley nut loose?

- Is the transport safety device removed?

- Is the product installed on a level and stablesurface? (Little noise may be generated during the high-speed SPIN.)

10 Leak breaker or current/leak

breaker is down during washing.

11 The heating is not executed.

- When the leak breaker is down,checkand sure it is grounded.

- When the current is down, the currentisleaked.

- Check the rated capacity ofthecurrent and leak breaker. The current breaker may be down due tothelack of the current when the washing machine and other apparatus are used. In this case, execute the coldwater wash to check whether the current capacity is lacking.

- Is the wash heater terminal unplugged?

- Is the wash heater normal?

- If above points are not found,the PCB assembly is out of order. Replace it.

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