Text preview for : 8050_troubleshooting.pdf part of lg wd-1050f servise manual wd-1050f
Back to : wd-1050f.rar | Home
8. ERROR DIAGNOSIS AND CHEK LIST
8-1.DIAGNOSIS AND ANSWER FOR ABNORMAL OPERATION
SYMPTOM NO POWER
GUIDE FOR SERVICE CALL
Is the power plug connected firmly to AC220-240V outlet?
YES
Power failure? or Breaker opened?
NO
Visit to check
Water inlet trouble Is "no inlet" displayed?
no inlet
YES
no inlet
Is the tap opened?
YES
Is the tap frozen?
NO
Is the water supply shut-off?
NO
Is filter in the inlet valve clogged with foreign material?
Clean the filter of inlet valve
YES
NO
Visit to check
15
SYMPTOM ¥ DOOR OPEN ERROR Refer to 7-4 ERROR DISPLAY
GUIDE FOR SERVICE CALL
Did you press the¡A Start/Pause¡B button when the door is open?
YES
Close the door
NO
Visit to check < Check if the door switch is O.K >
¥ Drain Trouble
no drain
Is "no drain" displayed?
YES
no drain
Is the debris filter clogged with foreign material such as pin, coin and etc.?
NO
YES
Clean up the filter.
Is the drain hose frozen with water, kinked or crushed?
NO
Visit to check
16
SYMPTOM ¥ Suds overflow from the appliance. (In this condition, wash and spin do not operate normally)
GUIDE FOR SERVICE CALL Is Low-sudsing detergent for the durm washing machine used?
YES
Is the proper amount of detergent used as recommended? YES Recommend to reduce the using amount of detergent.
LOW LATHERING DETERGENT
TThis appliance has the automatic suds sensing function which operates under much suds condition for good rinse and preventing overflow. T When much suds are sensed, suds removing fuction such as drain, water input and pause will operate without rotating the drum.
¥ No effect of softener
Is softener put in the correct compartment of drawer?
YES
Compartment for softener
Is the drawer closed during wash?
YES
Is the softener cap clogged?
YES
Explain how to use softener < Clean the compartment for softener > ¥OVER FLOW ERROR ¥PRESSURE S/W ERROR ¥THERMISTOR ERROR Refer to 7-4. ERROR DISPLAY Visit to check
17
8-2.FAULT DIAGNOSIS AND TROUBLE SHOOTING
1. Be careful of electric shock or disconnecting the parts while trouble shooting.
CAUTION
2. First of all, check the connection of each part terminal with wiring diagram. 3. Voltage between each terminal is AC 220-240V while applying an electric current (except secondary part of the transformer and sensors)
NO POWER
When measuring the voltage of the outlet, is the voltage AC 220-240V?
NO
Check the fuse?
YES
2 1
When measuring the voltage of blue connector of the PWB assy (Power), is the voltage AC 220-240V?
PWB ASSY (POWER)
NO
Replace PWB assy (Power)
YES
Is ۯconnector disconnected or or is the contact bad or cut?
3
YES
Reconnect and repair connector.
NO
Is wire of the PWB assy(Display) disconnected? Replace PWB assy(Main)
NO YES
Replace PWB assy(Display)
18
NO WATER SUPPLY
Is the water supply shut-off?
NO
Is the tap opened?
NO YES
Open the tap.
When you press both¡A Wash¡B button and Rinse¡B ¡A buttons simultaneously, is the water level frequency YES below 40? NO Is the inlet valve filter clogged with impurity?
Check the chamber(Air) and the tube clogged with impurity.
YES
Clean the filter.
NO
Is resistance of the inlet valve connector between 2 to 8 k§ ?
NO
Replace the inlet valve.
YES
Check the voltage between each terminal of inlet Valve is AV 220~240V. (Refer to 7-2 TEST MODE)
NO
Replace PWB assy(Main)
DETERGENT DOES NOT FLOW IN
Is water supplied?
NO YES
Refer to solution ¡A INLET¡B NO
Wiring diagram
Are replaceptacles correctly connected to the terminals of inlet valve? YES Is detergent put in the correct compartment of the drawer?
NO
Check the wiring on the dispenser. Put the detergent in the correct position
SOFTENER MAIN PRE WASH WASH
NO
PRE+MAIN MAIN WASH : Detergent
YES
MAX
Is the detergent hardened?
YES
Clean the drawer.
19
SOFTENER DOES NOT FLOW IN
Is water supplied?
NO YES
Refer to ¡ANO WATER SUPPLY¡B Check the wiring on the dispenser.
Wiring diagram
Are receptacles conectly connected to the terminals of NO inlet valve?
YES
Is softener put in the correct compartment of
MAX
drawer?
NO
Put it in the correct compartment.
YES
Is the softner cap clogged?
YES
Clean the cap and drawer.
ABNORMAL SOUND
Is the pulley bolt loosened?
YES
Fix the bolt tightly.
NO
Is the belt worn? Replace the V-belt (4400FR3116A)
YES NO
Is there friction noise from the motor?
YES
Replace the motor.
20
HEATING WITHOUT WATER
When pressing WASH£and RINSE£buttons at the £ £ same time after dranining, is the water level frequency 52 or more? When pressing WASH£, RINSE£buttons at the £ £ same time while wash, is the water level frequency between 20~40?
NO
Replace the sensor (pressure)
PWB ASSY(POWER)
YES
Replace the PWB assy (POWER or MAIN)
AC 220-240V
DRAIN MALFUNCTIONING
Is the drain hose kinked or frozen?
YES
Repair drain hose
NO
Is the filter of drain pump clogged?
YES
Remove foreign material.
NO
Is the connector disconnected or is the contact bad?
YES
Reconnect or repair the connector
NO
Is the coil of drain pump cut-off? (resistance of coil is 90~160¥ )
2 1
YES
Replace the pump assy
NO
When checking voltage between two receptacles as shown (¥L ¥M on spinning, is the voltage AC , ) 220-240V ? Replace the PWB assy (Main)
NO
PWB ASSY(MAIN)
21
WASH HEATER TROUBLE
When checking the voltage between two receptacles of the PWB assy(Power) during washing. Is the voltage AC 220-240V?
AC 220-240V
NO
Replace the PWB assy (Power)
YES
After power off, is the resistance between yellow wire and red wire of connector 10 to 30¥ ?
YES
Normal
Yellow
Red
NO
After power off, is the resistance of heater 10 to 30¥ ?
NO
Replace the heater assy
HEATING WATER CONTINUOUSLY ABOVE THE SELECTED WATER TEMPERATURE
1
Is the resistance between two receptacles with BL/WH wires parted from PWB assy 2.5k¥ to 180k¥ (105¡ ~0¡ )?
NO
Replace the thermistor (6322FR2046B)
YES
When checking thermistor on the tub cover, is the thermistor gotten more than 2 mm out of the rubber? Get the thermistor back to the rubber.
YES
22
SPIN TROUBLE
Check the frequency of the water level 48 or more. The frequency can be checked by pressing the Wash£ and Rinse£ £ £ buttons at the same time. Check the sensor (Pressure) or hose (Sensor). If the problem is on the sensor or the hose, replace the sensor or the hose.
NO
YES
Press Power£ button with both Rinse£and Spin£ £ £ £ buttons pressed after power off. Press Start/Pause£ £ YES button 2 times. Does the drum rotate at low spin speed?
Normal
Spin
NO
1 2 3 4
Is it disconnected or badly contacted? ¡a Natural:3pin(€ ),Red:4pin(€L ),Blue:2pin(€Ø ), Yellow:2pin(€OE )¡b
YES
Reconnect or repair it.
NO
Check the motor connector, is the resistance between the terminal in figure the same as below? Resistance between terminals € ~€º :0.5~1.0§ €º :1.5~2.5§ ~€
1 5
10
NO
Replace the motor assy. (4681FR1194A)
Be sure to unplug the machine before measuring. MOTOR TERMINAL
1 2 3 4 5 6 7 8 9 10 YES
Replace the PWB assy (Main)
23