22 _ Troubleshooting
Check Type
For USA
Causes
Remarks
Communication
Check
AC
- The signals between the sub and main PBAs are not sensed
because of communication Check.
- Check the connector connections between the sub and main
PBAs carefully.
→ Check for incorrect or loose connections, etc.
- Remove the sub PBA C/Panel and check for any faulty
soldering.
AC2
- The diagnosis of the I/O Board communication check.
AC3
- The signals between The DR Module and main PBAs are not
sensed because of communication Check.
- Check The connector connections between The DR Module
and main PBAs carefully.
→ Check for incorrect or loose connections, etc.
- Remove The DR Module and Check for any faulty soldering.
AC4
- The signals between The WIFI Module and main PBAs are not
sensed because of communication Check.
- Check The connector connections between The WIFI Module
and main PBAs carefully.
→ Check for incorrect or loose connections, etc.
- Remove the WIFI Module and Check for any faulty soldering.
AC5
- The signals between The LCD Module and main PBAs are not
sensed because of communication Check.
- Check The connector connections between The LCD Module
and main PBAs carefully.
→ Check for incorrect or loose connections, etc.
- Remove The LCD Module and Check for any faulty soldering.
AC6
- The signals between the Inverter PBA and main PBA are not
sensed because of communication Check.
- Check The connector connections between the Inverter PBA
and main PBA carefully.
→ Check for incorrect or loose connections, etc.
- Remove the Inverter PBA and Check for any faulty soldering.
Switch Check
(Main Relay
Check)
BC2
- The Power button is pressed continually.
(for more than 12 seconds).
- A switch is jammed or stuck due to be pressed unevenly due to
deformation of the control panel or button.
- This Check may occur when the screws that hold the sub PBA
in place are tightened too much.
- A button other than the Power button is continually pressed.
(for more than 30 seconds).
- Deformation of an internal plastic injection part.
- A screw for assembling the sub PBA is tightened too much.
Door Check
DC
- A switch contact Check because of a deformation of the door
hook.
- When the door is pulled by force.
When the door is not
opened after the door
open operation.
- This occurs in the Boil wash because the door is pushed due
to a pressure difference from internal temperature changes.
When the door is not
locked after the door
close operation.
DC1
- The door lock switch terminal is connected incorrectly.
- The door lock switch terminal is broken.
- This occurs intermittently because of an electric wire leakage
- Main PCB fault.
DC2
- This occurs if the Power switch is turned on/off
continually and too much heat is generated (This
check is difficult to be reproduced.)
