Standard Self-Diagnostic Function - LG GC-W061 series Service Manual

STANDARD SELF-DIAGNOSTIC FUNCTION

8. Standard Self-Diagnostic Function
In case if there is any malfunction in the wine cellar, a symbol automatically is indicated on the "set temperature" display.
Symbol explanation is on the circuit diagram on the back panel of the product.
8-1. Indications
Symbol
Symptom/Condition
Over-cooling and weak-cooling in upper
UU/UU
and lower part at the same time
Insufficient cooling in upper and lower part
Operation malfunction and OLP activated
Insufficient cooling in upper part
*EE/88
*88/EE Insufficient cooling in lower part
Improper communication in display
CO/- -
Insufficient cooling in upper part
*8E/88
Insufficient cooling in lower part
*88/8E
Insufficient cooling
*E8/88
*88/E8
Weak cooling/overcooling malfunction
NOTE)
If ' * ' indication appears, press both of the upper part temperature control switch (' ', ' ')at the same time.
NOTE) Turns off 'RED' and 'WHITE' LED of TOP and BOTTOM.
8-2. Presentation Mode
This function was added for salesroom display
1. Turn on the power and press both temperature increase
key (on the left side) and the 'lamp' (on the right side)
button at the same time for 5 seconds.
2. 'SHOP' or 'SH' displays for 3 seconds, then, the normal
temperature display comes up
Check point
VALVE Improper coolant valve location
Capillary tube welding clogged
VALVE PIPE welding
Improper coolant valve
clogged
operation
Upper part interior sensor Sensor line cut
Upper part cooling sensor Sensor malfunction
Lower part interior sensor Sensor line cut
Lower part cooling sensor Sensor malfunction
Display PWB lead wire Cut wire, PWB malfunction
Sensor line cut
Upper part interior sensor
Sensor malfunction
Lower part interior sensor
Sensor line cut
Lower part cooling sensor
Sensor malfunction
Upper part cooling sensor
Sensor line cut
Lower part cooling sensor
Sensor malfunction
Cut wire or a short circuit in the
MAIN PCB
exterior sensor
3. The compressor and the heater operation will be
interrupted. Temperature control and lamp function will
be in normal operation.
4. If you want to cancel the presentation mode, follow the
same instruction from number 1. Normal cooling mode
will resume.
* In case of a power outrage, the presentation mode
automatically cancels itself. Resetting is required.
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Cause
Replace Valve
Switch valve terminal location
Replace Case display
Replace barrier
Replace Case display
Replace Case display
Replace barrier
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Solution