22 _ Troubleshooting
Error Type
Error
Mode
Causes
Corrective Actions
Description of Photo
Water Supply
Error
4C
• This may occur
when The water
supply valve is
defective.
• This may occur
when The main
PCB is defective.
• This may occur
due to frozen
water.
• If the water supply valve is broken,
replace the valve.
• Check if the water supply is blocked
due to an alien substance in the
valve or check if the water is
supplied to the machine.
If a problem is found, take the
appropriate countermeasure.
• Check if the water supply is blocked
due to the water being frozen.
• If the PBA Relay malfunctions,
replace the PBA.
1. Measure the resistance of the water
supply valve.
- Resistance : 0.9KΩ to 1.1KΩ
between the terminals of the
Water Supply Valve.
2. Check whether there is foreign
material in the Water supply valve
filter.
Drain Error
5C
• This may occur
when The
drain pump is
defective.
• This may occur
due to frozen
water.
• Check if there
is any Alien
substance inside
The draining
pump.
• This may occur
when the main
PCB is defective.
• Check if there is any alien substance
inside the draining pump motor.
• Check the natural drain in the same
manner.
• Check if there are any incorrect
connections or broken wires.
• If the machine malfunctions
intermittently when the wash tub
water temperature is high, replace
the pump.
• If the motor stops due to the water
being frozen in winter, remove
the frozen Water referring to the
relevant repair procedures.
Check the drain pump resistance.
(Resistance : 13.05 ~ 16.45Ω)
Communication
Error
AC
• The signals
between the sub
and main PBAs
are not sensed.
• Incorrect wire
connections
between the sub
and main PBAs.
• 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.
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