Troubleshooting _ 35
Information
Type
Infor-
mation
Code
Causes
Corrective Actions
Description of Photo
Communication
AC3
• The diagnosis of the DR
communication error.
• Check the wire connections and
terminal contacts between the
main and inverter PBAs.
• Check for disconnected wires.
• If the main or Inverter PBA’s
communication circuit is faulty,
replace it.
AC4
• The diagnosis of the Wifi
communication error.
• Check the wire connections and
terminal contacts between the sub
and main PBAs.
• Check for disconnected wires.
• Check whether the sub PBA
is short-circuited because of
moisture.
• If the main PBA’s communication
circuit is faulty, replace it.
AC5
• The diagnosis of the LCD
communication error.
• Check the wire connections and
terminal contacts between the
main and inverter PBAs.
• Check for disconnected wires.
• If the main or Inverter PBA’s
communication circuit is faulty,
replace it.
Power
UC
(9C)
• Power condition fault.
• An error occurs when under or
over voltage is supplied.
• plug receptacle is used
• Main PBA fault (sometimes)
• Check the consumer’s power
conditions. : Make sure to check
the operating voltage.
• Connect a tester to the internal
power terminals during the Boil
or Dry operations and observe
the washing machine’s operation
carefully.
: Check the voltages. (An error
occurs when under or over
voltage is supplied.)
: Check whether a plug receptacle
is used. When the connecting wire
is 1m, a momentary low voltage
may drop up to 10 V
• Main PBA fault (sometimes)
-
Switch
(Main Relay)
bC2
• The Power button is
continually pressed.
• A button other than the Power
button is continually pressed.
• Main PCB relay fault
• Check whether either the
Power switch or a tact switch is
continually pressed.
• Check whether the service PBA
holding screws are fastened too
much. If they are fastened too
much, loosen them a little.
• If the main PBA switching IC on/
off error has occurred, replace the
main PBA.
Check the contact between the control panel buttons
and their corresponding tact switch.
- There must be a gap between a control panel
button and its corresponding micro switch.
Otherwise, an error occurs after approx. 30
seconds has passed.
gAP
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2018/2/1 17:15:50
