Whirlpool LHB Series Product Introduction page 30

Display Functionality
Check
• 7 Segment Display
• LEDs
• Key functionality
Check
•Lid Switch
•Lid Switch Circuit
•PCB Check
Diagnostic Routine
To Be Done /
Monitored
• Manual Inspection of
LEDs & 7 segment
display
• Press all the Keys
(except power key) on UI
• Look for Wash option
LEDs ON & along with
Single Buzzer tone for
every key press
• Open & Close the LID
• While Opening ' Lid
Opn ' Should be
indicated with all LEDs
in OFF, Error buzzer tone
& at Close, it should
proceed to next phase.
• All the Loads will be
turned ON once with
LEDs turned On in
Sequence
Failure
Indication
LEDs or 7 segment
• •
fails to Light up in
sequence •
No Buzzer tone will
• •
be heard for the
failed key press •
'Lid Opn' before
• •
opening the lid
• No Error detection
even after opening
•
the Lid
• Key Lock LED •
glows with Buzzer
tone
• 'PE' in display &
Buzzer tone
Diagnosis
Replacement of User
interface
Check for UI discrete
cable connection i.e.
Loose Connection
Replacement of User
interface
Check for UI discrete
cable connection i.e.
Loose Connection
Ensure that Lid bottom
hinge is activating the
Lid Switch
Check for Lid Switch &
Its connection with PCB
& Replace it.
Replacement of PCB