LG THERMA V AHNW16606B0 Service Manual page 59

Display
Title
code
35 Low Presser Error
n Error diagnosis and countermeasure flow chart
Are communication cable/
piping normal?
Yes
Is amount of refrigerant
normal?
Yes
Is strainer Ok?*
Yes
Are the value of manifold
gauge and pressure
sensor same?
(Is the low pressure value
actually low?)
Yes
Check unit LEV
Check unit PCB(Inverter)
Check unit
installation conditions
Cause of error
Excessive decrease of low
pressure
No
check communication/
piping correction.
No
Is there pipe crack or trace
of refrigerant leakage?
Yes
Weld / reconnect the cracked
portion and recharge refrigerant
No
Replace the strainer
No
Replace the pressure sensor
* If the temperature difference between inlet and outlet of strainer
is so large that frost or ice formation can be seen or confirmed
then clogging of strainer should be checked
(Notice: it is not full ice forming of strainer, in case that there is
not at inlet portion but at outlet portion)
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Check point & Normal condition
• Defective low pressure sensor
• Defective unit fan
• Refrigerant shortage/leakage
• Deformation because of damage of refrigerant pipe
• Defective unit EEV
• Covering / clogging (unit covering during the
cooling mode / unit filter clogging during heating
mode)
• SVC valve clogging
• Defective unit PCB(Inverter)
• Defective unit pipe sensor
No
Adjust the amount of
refrigerant (Additive charge)