53
Diagnostics
11-8) If CoolSelect Zone
TM
isn’t operated normally (RS2556, RS2578)
1) If the lamp of CoolSelect Zone
TM
is not lit.
2) Where the Panel PCB key isn’t selected:
- The basic method is applied to check – if you fail in troubleshooting after above the execution, then
Is the connector of
CoolSelect Zone
TM
inserted correctly
in the fridge?
Start
Reinsert the connector; troubleshoot
a bad contact.
Is the connector of main
PCB (CN51) inserted correctly?
Reinsert the connector in the main
PCB.
Is the connector of
CoolSelect Zone
TM
panel PCB
inserted ?
Reinsert the connector; troubleshoot
a bad contact.
1.Check the wires of CoolSelect Zone
TM
– check the disconnection of wire, short between wires.
2. Check the Lighting Circuit of CoolSelect Zone
TM
panel in the main PCB for Short/Open.
3. Check the main PCB of CoolSelect Zone
TM
assembly for Short; the state of wire assembly between
the panel and main PCB.
1. Check the wires of CoolSelect Zone
TM
– check the disconnection of wire, short between wires.
2. Check Short/Open the Lighting Circuit section of CoolSelect Zone
TM
panel in the main PCB from.
3. Check the inside main PCB of CoolSelect Zone
TM
ass’y for Short; the state of wire assembly
between main PCB.
NO
NO
YES
YES
NO
Panel PCB has trouble for itself.
YES
YES
Is lighting operated
normally when the exchange of CoolSelect Zone
TM
panel PCB?
Where the Panel key isn’ t selected:
NO
YES
Reassemble the PCB ass’y/Enforce
the cancellation of pressed keys
NO
Aren’t a key or more pressed
continuously?
YES
Reassemble the PCB asswmbly and
Enforce the cancellation of pressed keys
NO
Isn’t the PCB system
still operated by separation?
NO
Panel PCB has trouble for itself.
YES
Is lighting operated
normally after the exchange of
panel-PCB?
YES
1. Replace the main PCB.
2. Check the wires of CoolSelect Zone
TM
panel for Short.
NO
Is a periodical wave
form outputted from the main
PCB IC5,IC4?
�
Refer to 8-7) CoolSelect Zone
TM
,
Panel Circuit and measure the
wave form.
